Proheat x45 24v инструкция на русском

1. Manuals
2. Brands
3. Proheat Manuals
4. Heater
5. Teleflex X45
6. Installation and service

• Contents

• Table of Contents

• Troubleshooting

• Bookmarks

Summary of Contents for Proheat x45

INSTALLATION AND SE R V I C E M A N U A L

PROHEAT X45

Rev. H

CONTENTS

A. SAFETY .

B. INTRODUCTION .

…………………………………………………………………………. A-1

……………………………………………………………… B-1

C. MODEL DESCRIPTIONS…………………………………………………… C-1

1.0 TECHNICAL SPECIFICATIONS …………………………………………. 1-1

1.1 PHYSICAL – X45 …………………………………………………………… 1-2

1.2 ELECTRICAL – X45 ………………………………………………………… 1-4

1.3 TORQUE SPECIFICATIONS ……………………………………………….. 1-6

2.0 OPERATING YOUR PROHEAT HEATER………………………………. 2-1

3.0 INSTALLATION ……………………………………………………………….. 3-1

3.1 LOCATING THE HEATER ………………………………………………….. 3-2

3.1.1 Select Your Location ……………………………………………… 3-2

3.1.2 General considerations…………………………………………… 3-2

3.1.3 Mounting the Proheat Heater in an Enclosure………………. 3-3

3.2 MOUNTING THE HEATER …………………………………………………. 3-4

3.2.1 Option A – Heater With Enclosure ……………………………… 3-4

3.2.1 Option B – Heater Without Enclosure …………………………. 3-5

3.3 EXHAUST PIPE CONNECTION……………………………………………. 3-6

3.4 PLUMBING THE SYSTEM…………………………………………………. 3-7

3.4.1 General Considerations ………………………………………….. 3-7

3.4.2 Option A – Engine Heat or Supplemental Heat ……………… 3-8

3.4.3 Option B – Engine and Sleeper Heat ………………………….. 3-9

3.5 WIRING & ELECTRICAL CONNECTIONS……………………………… 3-10

3.5.1 General Considerations ………………………………………… 3-10

3.5.2 Power Connection to Batteries ……………………………….. 3-11

3.5.3 Timer Connections (Optional) …………………………………. 3-12

3.5.4 On/Off Switch Connections ……………………………………. 3-13

3.5.5 Sleeper Fan Model Heater Wiring Details ………………….. 3-14

3.5.6 Option A – OEM Heater & Proheat Thermostat ……………. 3-14

3.5.7 Option B – OEM Heater & Thermostat………………………. 3-15

3.5.8 Option C – Auxiliary Sleeper Heater………………………….. 3-16

3.5.9 Option D – Auxiliary Sleeper Heater Current Limited …….. 3-17

3.5.10 Auxiliary Input Model Heater Wiring Details………………. 3-18

3.5.11 Option A –

3.5.12 Option B –

3.5.13 Option C – Standard Mode & Supplemental Mode ………3-20

3.6 FUEL SYSTEM …………………………………………………………….. 3-22

3.6.1 General Considerations ………………………………………… 3-22

3.6.2 Option A – 1/4″ or 1/2″ NPT Port …………………………… 3-23

3.6.3 Option B – Existing Blank Fuel Sender Cover Plate ………. 3-24

3.6.4 Option C – Hole Drilled into Fuel Tank ………………………. 3-24

3.6.5 Installation ………………………………………………………… 3-25

3.7 FIRST TIME STARTUP……………………………………………………. 3-26

Preheat Mode Supplemental Mode Operation
Preheat and Supplemental Mode

………………. 3-20

… 3-19

4.0 PRINCIPLES OF OPERATION …………………………………………… 4-1

4-1 GENERAL DESCRIPTION ………………………………………………….. 4-1

4-2 MODES OF OPERATION …………………………………………………… 4-5

4.2.1 Standard Mode – All Models ……………………………………. 4-5

4.2.2 Preheat Mode – Aux Input Models Only ………………………. 4-6

4.2.3 Supplemental Mode – Aux Input Models Only ………………. 4-7

i

5.0 TROUBLESHOOTING & REPAIR .

5.0.1 Troubleshooting a Problem…………………………………. 5-1

.0.2 Example Proheat Behavior Error – Code 01…………….. 5-2

5

5-1 OPERATION INDICATORS, FUNCTION & COMPONENT

IAGNOSTICS …………………………………………………………. 5-3

D

5.1.1 Operation Indicators …………………………………………. 5-4

5.1.2 Function Diagnostics ………………………………………… 5-5

1 Start …………………………………………………………. 5-5

0

02 Flame Out ………………………………………………… 5-15

03 Coolant Flow …………………………………………….. 5-16

04 Overheat ………………………………………………….. 5-17

05 Voltage ……………………………………………………. 5-18

5.1.3 Component Diagnostics………………………………………… 5-19

06 Flame Sensor……………………………………………. 5-19

07 Temp Sensor ……………………………………………. 5-21

08 Fuel Pump………………………………………………… 5-23

09 Compressor ……………………………………………… 5-23

10 Ignition Coil………………………………………………. 5-25

11 Coolant Pump …………………………………………… 5-27

12 Blower …………………………………………………….. 5-30

13 Sleeper Fan ……………………………………………… 5-32

14 Hour Meter (Auxiliary Output)………………………… 5-33

5-2 COMPONENT MECHANICAL OR ELECTRICAL PROBLEMS ……….. 5-34

5.2.1 Fuel Nozzle ………………………………………………………… 5-34

5.2.2 Fuel Regulator…………………………………………………….. 5-34

5.2.3 Air Compressor …………………………………………………… 5-34

5.2.4 Fuel Pump …………………………………………………………. 5-34

5.2.5 Ignition Electrode ………………………………………………… 5-34

5.2.6 Coolant Pump …………………………………………………….. 5-34

5.2.7 Blower ………………………………………………………………. 5-34

5.2.8 Fuse ………………………………………………………………… 5-35

5-3 OPERATIONAL PROBLEMS ……………………………………………… 5-37

5.3.1 Smoking exhaust ………………………………………………… 5-37

5.3.2 Low heat output ………………………………………………….. 5-37

5.3.3 Engine temperature gauge reads low ……………………….. 5-37

5.3.4 Backfiring ………………………………………………………….. 5-37

………………………………………. 5-1

6.0 MAINTENANCE……………………………………………………………….. 6-1

6-1 WEEKLY MAINTENANCE ………………………………………………….. 6-1

6-2 ANNUAL MAINTENANCE ………………………………………………….. 6-1

6.2.1 Clean Heater Enclosure and Air Intake ……………………….. 6-2

6.2.2 Check Exhaust System …………………………………………… 6-3

6.2.3 Check Heat Exchanger……………………………………………. 6-3

6.2.4 Clean Flame Sensor ………………………………………………. 6-4

6.2.5 Check Cooling System ……………………………………………. 6-4

6.2.6 Check Batteries ……………………………………………………. 6-4

6.2.7 Check Fuel System………………………………………………… 6-5

6.2.8 Check Fuel Filter …………………………………………………… 6-5

6.2.9 Clean Nozzle………………………………………………………… 6-6

6.2.10 Replace Compressor Air Filter ………………………………… 6-6

6.2.11 Check Electrical System ……………………………………….. 6-7

6.2.12 Check Air Pressure ………………………………………………. 6-8

6.2.13 Check

Modes of Operation – Switch, Timer or OEM Signals

.. 6-8

7.0 APPENDICES …………………………………………………………………. 7-1

Bulletins 951528, 967329, SB0003, PB0034, SB0062

8.0 WARRANTY ……………………………………………………………………. 8-1

ii

PROHEAT INSTALLATION & SERVICE

A.

SAFETY

Throughout this manual, you will see notes labeled DANGER, WARNING,
CAUTION and NOTICE to alert you to special instructions or precautions

concerning a particular procedure that would be hazardous if performed
incorrectly or carelessly.

Observe them carefully!

These safety alerts alone cannot eliminate all hazards. Strict compliance
with these special instructions and common sense are major accident
prevention measures.

DANGER

Immediate hazards that will result
in severe injury or death.

WARNING

Hazards or unsafe practices that
could result in severe personal
injury or death.

CAUTION

Hazards or unsafe practices that
could result in minor injury or
product or property damage.

NOTICE

Information that is important to
proper installation or maintenance,
but is not hazard-related.

SECTION A. SAFETY

A-1

SAFETY CONSIDERATIONS

WARNING

WARNING

WARNING

WARNING

WARNING

WARNING

Exhaust

Inhalation of exhaust gas (containing carbon monoxide) may cause severe personal

injury and/or death. Anyone suspected of suffering from CO inhalation should be
removed from the hazardous area and given medical assistance immediately.

Explosion Hazard

Do not operate heater where combustible fumes or airborne particles, such as saw­dust, are present.

Fuel

Exercise extreme caution when working near fuel or fuel-filled equipment. Do not
operate heater during fueling operations. In addition, do not smoke or handle open
flame equipment, such as a blowtorch, around fuel.

Fire Hazard

Do not place any flammable items around the heater and exhaust pipe.

Batteries

Wear hand and eye protection when working near batteries. Do not smoke or use open
flames near batteries.

Electrical

Electric shock can cause severe personal injury, burns, and death. Before working on
any unit, disconnect the batteries. Use only approved materials and methods when
working on the electrical system and follow local electrical codes. Never work with
electricity in wet conditions or when you are feeling fatigued.

WARNING

WARNING

WARNING

DANGER

Poisons/Toxins

Fuel and coolant are toxic and in some cases, carcinogenic. Wear eye and hand
protection at all times. Remove contaminated clothing immediately and wash
contaminated skin. Do not breathe in vapors.

Moving/Hot Parts

Moving/hot parts can cause severe injury and or death. Before working on any unit,
shut it off. Do not operate any unit until protective covers have been replaced. Always
ensure bolts and clamps are correctly torqued and secured. Inspect mechanical com­ponents periodically for damage and corrosion.

Coolant

Never remove the filler cap when the engine is hot – escaping steam or scalding water
could cause serious personal injury. The coolant level in the expansion tank should be
checked at least weekly (more frequently in high mileage or arduous conditions). Always
check the level when the system is cold. Unscrew the filler cap slowly, allowing the
pressure to escape before removing completely. Never run the engine without coolant.

Prevent anti-freeze coming in contact with the skin or eyes. If this occurs, rinse
immediately with plenty of water. Anti-freeze will damage painted surfaces.

Never top-up with salt water. Even when travelling in territories where the water supply
contains salt, always ensure you carry a supply of fresh (rain or distilled) water.

California Proposition 65 Warning

Do not operate heater in garages or in other closed or unventilated areas.
Diesel exhaust and some of its constituents are known to the State of California to

cause cancer, birth defects, and other reproductive harm.
Electrical components in this product may contain lead, a chemical known to the

State of California to cause cancer and birth defects and other reproductive harm.

A-2

PROHEAT INSTALLATION & SERVICE

INTRODUCTIONB.

PROHEAT Model X45

This manual is provided to assist an authorized PROHEAT
dealer to install and service a PROHEAT heater. Although
trucks have been used in the examples, applications for
PROHEAT are by no means limited to trucks. PROHEAT
heaters are designed to be used on any diesel equipped
vehicle including: trucks, buses (school, transit and coach),
construction equipment, off road equipment, military
equipment and cargo.

PROHEAT heaters are used in the following applications:

(1) Engine Block Heat – PROHEAT will preheat an engine

block to ensure reliable starting in cold weather. At
the same time it may be used throughout the year to
reduce the wear associated with cold starts.

(2)

Cab or Sleeper Heat (engine off) – PROHEAT will supply
heat to the cab or sleeper. Drivers can sleep in comfort
not only in the cold of winter but also in the spring
and fall when the weather is miserable. Substantial
savings through reduced fuel consumption and engine
wear can be obtained by not idling the engine.

(3)

Supplemental Heat (engine running) – as the efficiency
of modern diesel engines are improved there is no
longer adequate reject heat available to heat the
vehicle’s interior. This is particularly true for buses.
PROHEAT can be used while the vehicle is operating
to provide supplemental heat for the interior.

(4) Cargo Heat – PROHEAT can be used to provide heat to

protect valuable cargo such as produce or beverages
from damage due to freezing.

(5) Marine – Marine applications typically involve the

engineering and installation of a complete hot-water
heating system of which PROHEAT is only one
component. Proheat recommends that only an
expert in marine hot-water heating systems install a
PROHEAT on a boat. It is the installer’s responsibility
to ensure that the installation complies with all
applicable regulations.

SECTION B. INTRODUCTION

B-1

B-2

PROHEAT INSTALLATION & SERVICE

C.

Sleeper Fan Output or Auxiliary Input
Identification.

MODEL DESCRIPTIONS

This manual covers all models of PROHEAT X45. Please refer to the X45 Parts
Book at www.proheat.com for detailed part descriptions and part numbers.
Included in the parts book are optional features such as a timer, sleeper fan

ontrol kit, impact switch (for school bus applications) and associated

c
installation and maintenance tools.

The following information describes the three general characteristics of X45
models covered in this manual: voltage, enclosure and Proheat Control Module
(PCM) options.

PROHEAT CONTROL MODULE (PCM): SLEEPER FAN
OUTPUT OR AUXILIARY INPUT

The PCM comes in either a sleeper fan output or auxiliary input model. The
sleeper fan model is limited to a 3 amp output and is generally installed on
trucks that require sleeper fan power (it is only available on 12 V models).
The

Auxiliary
Mode and Supplemental Mode. This operation is typically used for transit and
coach installation. Refer to page 4-2 for more information.

Input model uses two special input pins that allow for a Preheat

Voltage Identification.

VOLTAGE CONFIGURATION: 12 V OR 24 V

The X45 is available in either a 12 V or 24 V models.

ENCLOSURE

An optional enclosure provides environmental protection.

SECTION C. MODEL DESCRIPTIONS

C-1

C-2

PROHEAT INSTALLATION & SERVICE

1.0

TECHNICAL
SPECIFICATIONS

X45 12V X45 24V

RATING 45,000 BTU (13 kW)

YSTEM VOLTAGE 10 –15 VDC 20 – 30 VDC

S

ominal Voltage Range

N

CURRENT DRAW 7.5 Amps 3.75 Amps

FUEL CONSUMPTION

(Average to Maximum) 0.1 – 0.45 gal/hr. (0.4 – 1.7 L/hr.)

COOLANT FLOW 8.0 gal/min. (30 L/min.)

COOLANT TEMPERATURE (at Heater) 150°F to 185°F (65°C to 85°C)

OPERATING TEMPERATURE RANGE -40°F to +122°F (-40°C to +50°C)

IGNITION TYPE Electronic Spark Ignition

HEAT EXCHANGER CAPACITY 1 quart (0.95 L)

WEIGHT Heater ONLY 40 lbs (18 Kg)

WEIGHT Heater with Enclosure 55 lbs (25 Kg)

DIMENSIONS – HEATER (L x W x H) 18.9 x 11.2 x 10.6 inches

DIMENSIONS – ENCLOSURE (L x W x H) 20.2 x 12.3 x 10.5 inches

WARRANTY Two years parts and labor

(520 x 320 x 280 mm)

(513 x 313 x 267 mm)

DANGER

DO NOT use gasoline.

FUEL TYPES

COMPATIBLE Diesel (ULSD, #1, #2, Arctic), JP8, Jet A1

Bio Fuels – Contact Proheat www.proheat.com

SYSTEM OUTPUTS

HOUR METER Same as System Voltage

(AUXILIARY OUTPUT) Maximum 1 Amp draw (over-load shut-off protection)

High-side switched

SWITCH/TIMER Same as System Voltage
POWER Maximum 1 Amp draw (over-load shut-off protection)

High-side switched

SLEEPER FAN Same as System Voltage
(Certain Models Only) Maximum 3 Amp draw (over-load shut-off protection)

High-side switched

INDICATOR LIGHT Same as System Voltage

Maximum 1 Amp draw (over-load shut-off protection)
High-side switched

SYSTEM INPUTS

SWITCH 10 – 15 VDC (12V X45) | 20 – 30 VDC (24V X45)

Standard Run Mode
Preheat Run Mode (Certain Models Only)
Supplemental (Certain Models Only)

POWER 12 VDC or 24 VDC

SECTION 1. TECHNICAL SPECIFICATIONS

1-1

1.1

PHYSICAL – X45

X45 HEATER1.1.1

Figure 1-1 Heater Dimensions – X45

1-2

PROHEAT INSTALLATION & SERVICE

X45 WITH ENCLOSURE1.1.2

Figure 1-2 Heater Dimensions including Enclosure – X45

SECTION 1. TECHNICAL SPECIFICATIONS

1-3

1.2

ELECTRICAL – X45

Figure 1-3 Wiring Diagram – X45

1-4

PROHEAT INSTALLATION & SERVICE

Figure 1-4 PCM Electrical Connections – X45

SECTION 1. TECHNICAL SPECIFICATIONS

1-5

TORQUE SPECIFICATIONS1.3

FAN END CASTING

Apply anti-seize to bolts (3)

•

• Torque bolts (3) to 75±5 in/lbs (8.5±0.5 Nm)

REGULATOR

• Apply anti-seize to cap screw

• Torque cap screw to 94±6 in/lbs (10.6±0.7 Nm)

FLAME SENSOR

• Torque sensor to 25±3 in/lbs (2.8±0.3 Nm)

IGNITER

• Apply anti-seize to igniter threads

• Ensure gasket is present before installing

• Torque igniter to 50±5 in/lbs (5.6±0.6 Nm)

COMBUSTION TUBE

• Apply anti-seize to cap screws

• Torque cap screws (4) to 25±3 in/lbs (2.8±0.3 Nm)

1-6

PROHEAT INSTALLATION & SERVICE

OVERHEAT SENSOR

• Lubricate o-ring with o-ring lubricant

• Torque senor to 500±50 in/lbs (56±5.6 Nm)

TEMPERATURE SENSOR

• Lubricate o-ring with o-ring lubricant

• Torque senor to 25±3 in/lbs (2.8±0.3 Nm)

AIR FILTER

• Torque cap screw to 50±5 in/lbs (5.6±0.6 Nm)

SECTION 1. TECHNICAL SPECIFICATIONS

BLOWER ASSEMBLY

• Apply anti-seize to bolts (4)

• Torque bolts (4) to 25±3 in/lbs (2.8±0.3 Nm)

PROHEAT CONTROL MODULE (PCM)

• Apply anti-seize to bolts (3)

• Torque bolts (3) to 75±7 in/lbs (8.5±0.8 Nm)

1-7

MAIN INTERNAL HARNESS

• Torque bolt (1) to 10±2 in/lbs (1.1 +/- 0.2)

NOZZLE TO FAN END

• Lubricate o-ring on nozzle with diesel

• Torque nozzle to 150±10 in/lbs (17±1.1 Nm)

NOZZLE REASSEMBLY

• Torque nozzle (1) to 30±3 in/lbs (3.4±0.3 Nm)

BAND CLAMPS

• Torque clamps (4) to 25±3 in/lbs (2.8±0.3 Nm)

ENCLOSURE LID (Optional)

• Anti-seize recommended on bolts

• Torque clamps (2) to 30±3 in/lbs (3.4±3.4 Nm)

1-8

PROHEAT INSTALLATION & SERVICE

HARNESS GROUND LUG

• Apply anti-seize to bolt

• Torque bolt (1) to 75±5 in/lbs (8.5±0.5 Nm)

FUEL PUMP ASSEMBLY

A

• Apply Loctite 242 to threads

• Torque bolts (2) to 25±3 in/lbs (2.8±0.3 Nm).

B

• Lubricate o-ring with diesel fuel

• Torque relief valve to 22±2 in/lbs (2.5±0.2 Nm).

C

• Apply Loctite 59241 sealant to threads

• Torque elbow (1) to 55±5 in/lbs (6.2±0.5 Nm) minimum or until
elbow is at correct orientation

FUEL FILTER

• Lubricate o-ring with diesel fuel

• Torque nut (1) to 150±10 in/lbs (17±1.1 Nm)

SECTION 1. TECHNICAL SPECIFICATIONS

1-9

1-10

PROHEAT INSTALLATION & SERVICE

2.0

OPERATING YOUR
PROHEAT HEATER

NOTICE

These instructions cover Standard
Mode operation that are normally
installed on trucks. To operate your
heater in Preheat or Supplemental,
refer to page 3-18 to page 3-20 and
page 4-6 to page 4-7.

NOTICE

Regular use of your PROHEAT
throughout the year will improve
its reliability. Weekly operation is
recommended.

NOTICE

The PROHEAT heater can be
operated by either using a toggle
switch or a 7 day timer.
Refer to page 3-10 for WIRING &
ELECTRICAL CONNECTIONS.

ENGINE HEAT ONLY

1. Switch the ON/OFF switch located in the vehicle dash to “ON.”

The switch will light and the heater will cycle on. It will continue to operate until
the coolant reaches 185˚F (85˚C) at the heater outlet and then cycle “OFF.”

When the coolant temperature falls below 150˚F (65˚C) at the heater
outlet, it will refire and repeat the cycle.
It will continue to cycle until:

a) the heater is switched “OFF,”
b) the heater runs out of fuel,
c) the vehicle battery voltage drops below 10.0 Volts, or
d) an error occurs and the switch light flashes

(See Troubleshooting & Repair, Section 5)

NOTE: The PROHEAT may be operated if the engine is running or not running.

2. When engine preheat is no longer required, switch the PROHEAT heater

“OFF.”

ENGINE AND SLEEPER HEAT

1. Switch the ON/OFF switch located in the vehicle dash to “ON.”

The switch will light and the heater will cycle on. It will continue to operate until
the coolant reaches 185˚F (85˚C) at the heater outlet and then cycle “OFF.”

When the coolant temperature falls below 150˚F (65˚C) at the heater
outlet, it will refire and repeat the cycle.
It will continue to cycle until:

a) the heater is switched “OFF,”
b) the heater runs out of fuel,
c) the vehicle battery voltage drops below 10.0 Volts, or
d) an error occurs and the switch light flashes

(See Troubleshooting & Repair, Section 5)

SECTION 2. OPERATING YOUR PROHEAT HEATER

NOTE: The PROHEAT may be operated if the engine is running or not running.

2. For sleeper heat – set the thermostat in the sleeper to the desired
temperature. If the set temperature is higher than the temperature in the
sleeper the fan will cycle “ON.” When the air reaches the set temperature
the fan will cycle “OFF.” The fan will cycle “ON” and “OFF” to maintain the
set temperature.

3. When engine and/or sleeper preheat is no longer required, switch the
PROHEAT heater “OFF.”

2-1

2-2

PROHEAT INSTALLATION & SERVICE

3.0

INSTALLATION

NOTICE

If additional installation information is
required
Dealer regarding your specific
application.

For more technical information,
please contact PROHEAT Product
Support at www.proheat.com

please contact your PROHEAT

The installation details described in this manual focuses on truck applications
and does not cover all of the possible installations. As seen in the figures
below, the PROHEAT X45 is installed on a variety of equipment including
trucks, school buses, coaches, drill rigs, mine dump trucks and excavators.
In these cases the manual should be used as a guideline only.

There are seven major steps that must be completed to successfully install
the PROHEAT heater.

3.1 LOCATING THE HEATER………………………………………………… page 3-2

3.2 MOUNTING THE HEATER ………………………………………………. page 3-4

3.3 EXHAUST PIPE CONNECTION …………………………………………. page 3-6

3.4 PLUMBING THE SYSTEM………………………………………………. page 3-7

3.5 WIRING & ELECTRICAL CONNECTIONS …………………………… page 3-10

3.6 FUEL SYSTEM ………………………………………………………….. page 3-22

3.7 FIRST TIME STARTUP…………………………………………………. page 3-26

Prior to the installation of your PROHEAT, consult your engine owner’s manual
or engine manufacturer for any restrictions or changes that may apply to
plumbing into the engine coolant system.

Figure 3-1 Other Applications.

SECTION 3. INSTALLATION

3-1

3.1

LOCATING THE HEATER

3.1.1

You Choose



CAUTION

Do not weld PROHEAT heater
mounting brackets to the
vehicle frame.

If repairs to the vehicle require
welding, disconnect the PROHEAT
power cable at the PCM. This will
prevent damage to the PROHEAT
electronics.

SELECT YOUR LOCATION

The most suitable location for mounting the heater will vary depending
on the type of vehicle. Recommended mounting locations are:

• Behind the cab across the frame rails (1).

• On either side of the frame rails (2).

• In an existing enclosure on the vehicle (step or toolbox) (3).

1

2

3

2

Figure 3-2 Recommended Mounting Positions

3.1.2

WARNING

Never locate the heater inside
the vehicle cab. (See Figure 3-3)

GENERAL CONSIDERATIONS

• Never mount the heater to two separate parts of the vehicle.

• Avoid mounting the heater in areas of excessive vibration.

• Do not mount the heater directly to the engine.

• Do not mount the heater beneath a wood floor without a proper fire wall
above the heater.

• Avoid mounting the heater in areas of excessive dust, dirt and moisture
accumulation.

• The heater must be easily accessed for service.

COOLANT OUT

FUEL IN

Figure 3-3

MINIMUM
CLEARANCE 6″

Figure 3-4 Allow minimum 6″ clearance

for hose connections.

COOLANT IN

3-2

PROHEAT INSTALLATION & SERVICE

Heater must be mounted below the highest point in the cooling system. An
expansion tank may be added to the coolant system above the heater if this
is not possible.

HIGHEST POINT IN
COOLING SYSTEM

HEATER MUST
BE MOUNTED
BELOW
HIGHEST POINT

PROHEAT ENGINE OR RADIATOR

Figure 3-5 Height Requirement

3.1.3

MOUNTING THE PROHEAT HEATER IN AN ENCLOSURE

Do not locate the heater in an
airtight enclosure. If the heater is to
be mounted in an enclosure other
than the PROHEAT enclosure,
adequate air flow must be provided
to ensure proper combustion. The
enclosure must also be adequately
ventilated so that the ambient
temperature inside the enclosure
does not exceed 185 °F (85 °C).
The openings must be positioned to prevent moisture dirt and snow from
accumulating in the enclosure. The heater enclosure must be easily
accessed for servicing of the heater.

Heater must be mounted within 5˚ of horizontal, as shown.

Figure 3-6 Adequate Air Flow

SECTION 3. INSTALLATION

5˚

5˚

Figure 3-7 Mounting Angle

5˚
5˚

3-3

3.2

MOUNTING THE HEATER

Select Your Mounting Option

Figure 3-8 Mounting Tray

3.2.1

OPTION A

1. Remove the enclosure cover.

2. Drill the (4) mounting holes and exhaust pipe clearance hole.

3. Using the bolts supplied, fasten the enclosure to the mounting

tray or brackets.

4. Ensure that the combustion tube can be removed for service.

See Figure 1-2 on page 1-3 for service space requirements.

– Heater With Enclosure

20″ (508 mm)

1 5/8″

(45 mm)

3″ (76 mm) Dia.

5″ (127 mm)

12″

(306 mm)

5 3/4″ (146 mm)

3/4″ (20 mm) MOUNTING HOLES
(4 REQUIRED)

Figure 3-9 X45 Enclosure Base Dimensions

5″ (127 mm)

CENTERLINE OF ENCLOSURE

8 13/16″

(223 mm)

5″ (127 mm)

16 11/16″ (427 mm)

1 5/8″ (45 mm)

3-4

PROHEAT INSTALLATION & SERVICE

NOTICE

3.2.2

OPTION B

– Heater Without Enclosure

Heater supplied without an enclosure (mount in an existing enclosure on the
vehicle ie. tool box). Heater supplied with an auxiliary mounting plate.

Use anti-seize compound on fasteners
to prevent galling and corrosion.

3″ (76 mm) Dia.

. Ensure that the proposed enclosure is big enough for the heater.

1

2

1

⁄2W x 11H x 201⁄2L inches (318 x 280 x 521 mm)

12

. Using the indicated dimensions, drill the (4) mounting holes

and exhaust pipe clearance hole.

3. Ensure that the combustion tube can be removed for service.

See Figure 1-2 on page 1-3 for service space requirements.

8.5″ (216 mm)

1.0″ (25 mm)

4 X .38″ (10MM)
MOUNTING HOLES

5″

(127 mm)

2.02″

(51 mm)

Figure 3-10 X45 Mounting Plate Dimensions & Exhaust Hole

5.5″

(140 mm)

6.4″

(163mm)

5″ (127 mm)

7.5″ (191 mm)

SECTION 3. INSTALLATION

3-5

3.3

NOTICE

If additional information is required,
please contact your PROHEAT Dealer
regarding your specific application.
Alternatively, please contact PROHEAT
Product Support at www.proheat.com.

EXHAUST PIPE CONNECTION

1. Push the exhaust pipe through the hole in the enclosure and onto the

exhaust outlet port of the heater. Ensure that the pipe is pushed onto
the spigot at least 11⁄2» (38 mm).

2. Route the exhaust pipe such that:

• exhaust gasses do not enter the passenger compartment.

• exhaust gasses do not enter the heater’s combustion air inlet

• exhaust system does not rest against or be directed toward any parts
of the vehicle that may be damaged by heat (i.e. brake lines, seals, wires
rubber hoses or bumpers). The exhaust pipe may be have to be insulated
if it’s within 6″ of combustible materials or composite body parts

• the exhaust outlet does not face the same direction as vehicle travel

• debris and snow will not plug the outlet

• the exhaust pipe is protected from curb damage

• the exhaust system should have a downwards slope for condensation
to drain. If needed a 3/8″ hole should be drilled into the exhaust pipe
at the lowest point so that the condensation will drain.

3. Disassemble the exhaust pipe clamp and apply anti-seize compound to
the threads.

4. Assemble the exhaust clamp over the exhaust pipe (clamp goes inside
the enclosure) and tighten the nuts.

,

WARNING

Exhaust gases must not enter
the vehicle interior. Direct
exhaust pipe away from vehicle.

NOTICE

Use of muffler or other restrictions in the
exhaust system is not recommended.

NOTE: 11⁄2» exhaust pipe should not exceed 5 ft and have no more than

180 degrees of bends. The bends must be formed for best results.
Do not use 90 degree welded pipe to turn corners.

Use formed elbows.

Do not use welded
90˚ elbows.

DIRECTION
OF VEHICLE
TRAVEL

EXHAUST CLAMP
U BOLT (APPLY
ANTI-SEIZE
COMPOUND
TO THREADS)

3-6

ENSURE THERE ARE
NO AIR LEAKS AROUND
THE CONNECTION

Figure 3-11 Exhaust Pipe

PROHEAT INSTALLATION & SERVICE

3.4

PLUMBING THE SYSTEM

MA

X

I

MUM

C

ROS

S

—

F

Figure 3-12 Maximum cross-flow

3.4.1

L

OW

GENERAL CONSIDERATIONS

Coolant flow must be maintained throughout the coolant system

nder all conditions.

u

• Keep the engine inlet and outlet ports as far apart as possible to maximize

cross-flow through engine.

• Coolant pump and engine water pump must flow in the same direction.

• Ensure that no sharp kinks or bends exist in the hoses which may restrict

coolant flow.

• Avoid high points in the hose routing to prevent air traps.

• For systems requiring more than 50 feet of coolant line, contact Proheat

Product Support at www.proheat.com for coolant pump recommendations.

For plumbing the system use:

1

⁄2» NPT pipe fittings or bigger.

3

⁄4» ID heater hose.

NOTE: Use of silicone hose requires special hose clamps.

Shut-off valves are not required at the engine inlet and outlet connections but
may be used if desired. They should be left open at all times so that the heater
can be operated throughout the year.

You Choose



Select Your Plumbing Option

Option A:

Engine heat or supplemental heat.

The PROHEAT heats the engine block only.

NOTE: When the engine block is preheated you will have nearly

instant heat from the dash heat exchanger.

Option B: Engine and sleeper heat.

The PROHEAT heats the engine block and the sleeper.

NOTE: Plumbing the PROHEAT through the dash fan is not

recommended.

SECTION 3. INSTALLATION

3-7

Instructions for Options A and B

WARNING

Opening the radiator cap when
the engine is hot may cause
serious injury.

3.4.2

1. Remove the radiator cap to release the system pressure.

2. Drain the coolant system.

3. Plumb the system as per Figure 3-13 or Figure 3-15

. Add engine coolant to the system as per the specific engine

4

manufacturer’s recommendations and re-install the radiator cap.

NOTE: Plumbing the PROHEAT through the dash fan is not recommended.

OPTION A – Engine Heat or Supplemental Heat

DASH HEATER

RETURN TO ENGINE

RETURN TO ENGINE

SUPPLY TO PROHEAT

SUPPLY TO PROHEAT

Figure 3-13 Engine Heat or Supplemental Heat

ENGINE

NOTE: On coolant systems where the return from the PROHEAT is plumbed to

the bottom of the main coolant supply line from the radiator to engine
pump, the return line must be moved to avoid loss of heat through the
radiator.

ENGINE

RETURN TO ENGINE

SUPPLY TO PROHEAT

ENGINE

Figure 3-14 Correct Return Line Plumbing

3-8

PROHEAT INSTALLATION & SERVICE

3.4.3

or best results these vehicles

F
should use an auxiliary heater.

International with single heater

OPTION B – Engine and Sleeper Heat

OEM OR AUXILIARY
SLEEPER HEATER

DASH HEATER

For vehicles with solenoid valves
in the normally closed position.

Western Star

SOLENOID VALVE
OEM COMBO HEATERS
ONLY (NORMALLY OPEN)

SUPPLY TO PROHEAT

Figure 3-15 Engine and Sleeper Heat

RETURN TO ENGINE

ENGINE

NOTE: Vehicles equipped with a combination heater/air-conditioner will have

a solenoid operated shut-off valve in the heater unit. Typically this valve
is normally open with the truck engine turned off and the key removed.

(See Figure 3-16 for plumbing)

Due to the many options available in vehicle heating and air
conditioning systems, the installer should be looking for any
restrictions that may affect coolant flow, with vehicle ignition in the
“OFF” position.

SLEEPER HEATER

SOLENOID VALVE
(NORMALLY CLOSED)

DASH HEATER

NOTICE

The PROHEAT PCM sleeper fan circuit
has a one minute delay during ignition.
Power to open a sleeper fan coolant
valve must be taken from another
source such as the wire for the hour
meter (auxiliary output). (See PROHEAT

Wiring Diagram on page 1-4.)

SECTION 3. INSTALLATION

SUPPLY TO PROHEAT

Figure 3-16 Engine and Sleeper Heat

RETURN TO ENGINE

ENGINE

3-9

3.5

WIRING & ELECTRICAL
CONNECTIONS

3.5.1

Figure 3-17 Test Battery

WARNING

Do not use on positive ground
vehicles.

GENERAL CONSIDERATIONS

• Prior to installation of the PROHEAT Heater system, ensure that the

vehicle batteries are in good condition.

• Do not kink or abrade wires when routing them through the vehicle during

installation.

• Ensure wires are well supported and secured with tie-wraps.

• Do not use acid core solder when making solder connections.

Major Electrical Connections Required

a) Power connection to batteries …………………………………………. page 3-11

b) Timer or ON/OFF switch connections…………………………………. page 3-12

c) Sleeper fan model heater connections (optional)………………….. page 3-14

d) Auxiliary Input model heater connections (optional)……………….. page 3-18

TO SLEEPER FAN OR AUX INPUT
DEPENDING ON MODEL

CAUTION

If repairs to the vehicle require
welding, disconnect the PROHEAT
power cable at the PCM. This will
prevent damage to the PROHEAT
electronics.

CAUTION

Vehicles using ground side battery
disconnect switches must install an
in-line 10 Amp fuse on the internal
harness (Proheat part # PK0310).
This will prevent damage to the
harness and PCM, (refer to Service
Bulletin SB0003 in Appendix).

TO BATTERIES

TO ON/OFF SWITCH
AND/OR TIMER

Figure 3-18 Major Electrical Connections

3-10

PROHEAT INSTALLATION & SERVICE

3.5.2

CAUTION

2 Volt products should not use

1
power split from a 24 Volt system.
This will cause uneven charging of
the batteries.

POWER CONNECTION TO BATTERIES

1. Route wire harness from PCM to the battery. Cut the harness to length

as required.

2. Strip outer wire jacket of harness back to expose the positive (red) and

negative (black) leads. Strip the leads as shown and crimp the ring
tongue terminals supplied to the wires. Connect the leads to the battery

erminals. (See Figure 3-19.)

t

NOTICE

Systems providing heat to both engine
and sleeper require four (4) batteries.

3. Leave power harness disconnected. (See Figure 3-19.) Do not install until

PROHEAT coolant pump system has been purged of air. (See First Time

Startup, page 3-26)

NOTE:

When power is connected to the PCM, all segments of the LED will flash
on the PCM. This indicates that power has been supplied. See page 5-4
for more information.

NOTE: Ensure the battery terminals are clean and free of corrosion. Remove

and clean. Prior to re-connecting grease terminals with electrically
conductive grease.

STRIP WIRE AS SHOWN AND
CRIMP TO TERMINAL

3/16″

POWER SUPPLY
HARNESS

BLACK (-) NEGATIVE

RED (+) POSITIVE

Figure 3-19 Power Connection to Battery

SECTION 3. INSTALLATION

3-11

3.5.3

CAUTION

The switch input circuit should only
be used to supply power to the
ON/OFF Switch, the Timer, or as a
signal to trip a relay. Failure to
follow this installation practice will
result in damage to the PCM.

NOTICE

The PCM must be reset (power
disconnected and reconnected)
when changing from a Timer to an
ON/OFF Switch or from an ON/OFF
Switch to a Timer.

Do not connect an ON/OFF Switch
and a Timer in the same circuit.

TIMER CONNECTIONS (OPTIONAL)

Black wire Ground
Red wire Power
White wire Operational signal from heater
Green wire “ON” Signal to heater
Grey wire Keyswitch backlighting (optional)

Figure 3-20 Timer Connections

3-12

PROHEAT INSTALLATION & SERVICE

3.5.4

ON/OFF SWITCH CONNECTIONS

1. Select a suitable location in the vehicle dash for the ON/OFF Switch.

CAUTION

The switch input circuit should only
be used to supply power to the
ON/OFF Switch, the Timer, or as a
signal to trip a relay. Failure to
follow this installation practice will
result in damage to the PCM.

NOTICE

The PCM must be reset (power
disconnected and reconnected)
when changing from a Timer to an
ON/OFF Switch or from an ON/OFF
Switch to a Timer.

Do not connect an ON/OFF Switch
and a Timer in the same circuit.

DASH

1/2″ DIA.
HOLE

SWITCH
LABEL

NOTE: Many dash panels have switches which are not utilized. It may be

convenient to remove one and replace it with the PROHEAT switch.

2. Drill a1⁄2» diameter hole through the dash for the switch. Make sure you

have clearance behind the dash for the switch wires and connections.
Install the switch as per the diagram. (Figure 3-21)

3. Route the switch wire harness from the PCM to the dash panel. You will

have to pass the wire harness through the vehicle firewall. If possible use
an existing hole. Use a grommet to prevent the wire from being damaged
when it is passed through the hole.

4. Cut the harness to length.

5. Strip outer wire jacket of harness back to expose the 4 wires. Strip the

wires as shown and crimp the supplied1⁄4» spade terminals.

NOTE: Use fully insulated disconnects when connecting Switch.

ON/OFF
SWITCH

NUT

Figure 3-21 ON/OFF Switch Assembly

Figure 3-22 ON/OFF Switch Connections

6. Connect the terminals to the switch as shown. (Figure 3-22)

NOTE: The PCM must be reset (power disconnected and reconnected) when

changing from a Timer to an ON/OFF Switch or from an ON/OFF Switch
to a Timer. Connecting an ON/OFF Switch and a Timer in the same
circuit will cause the indicator light to flash incorrectly.

SECTION 3. INSTALLATION

3-13

3.5.5

SLEEPER FAN MODEL HEATER WIRING DETAILS

NOTICE

These instructions require a Sleeper
Fan model. For more information see

age 4-2.

p

You Choose



NOTICE

Sleeper Fan output does not supply
power during ignition (1 minute after
switch ON). DO NOT use for controlling
coolant valves. See page 4-5 for
operational sequence information.

The Hour Meter (Auxiliary) Output may
be used to control supplemental relays
to turn on coolant valves.

If additional installation information is
required, please contact your PROHEAT
Dealer or Product Support at
www.proheat.com

These installation options allow the operator to:

1. Run the PROHEAT with the ignition key in the “OFF” position.

2. Return full control to the OEM system in normal operation mode.

Select one of the following wiring options

NOTE: PROHEAT IS NOT RESPONSIBLE FOR CHANGES IN SLEEPER

FAN SYSTEMS BY ORIGINAL EQUIPMENT MANUFACTURING
COMPANIES.

Due to the wide variety of wiring schematics that exist, we emphasize that
if you are in any doubt you should contact your dealer or PROHEAT Product
Support at www.proheat.com

Option A: Used when climate control systems in sleepers require one or

more of the following features to be controlled.

1. Normal OEM fan speed selection.

2. A separate thermostat is required to turn the sleeper fan
motor “ON” and “OFF” because the OEM system uses a
constant running fan.

3.

A valve in the sleeper heater coolant line regulates the flow
must be fully opened when the PROHEAT is running.

4. Prevent possible back-feeding on ground side switched
systems.

and

3.5.6

Option B: Used in larger sleepers requiring greater fan speed to provide

sufficient air movement to the sleeper. This allows the driver to
select the fan speed.

Option C: Used when a dedicated auxiliary heater is required.

Option D: Limits the power provided to the sleeper fan motor to

3 Amps. With this system the total electrical draw is controlled
by PROHEAT.

NOTE: For larger systems in the latest model trucks this may not provide

enough fan speed and therefore Option A, B or C should be used.

OPTION A – OEM Heater & Proheat Thermostat

Please go to www.proheat.com for equipment specific installation instructions.

3-14

PROHEAT INSTALLATION & SERVICE

3.5.7

OPTION B – OEM Heater & Thermostat

1. Make sure the vehicle ignition is switched “OFF.”

2. Locate the PROHEAT thermostat in a central area of the sleeper,

approximately 12″ above the bunk. Avoid direct air flow from sleeper fan
ducts. (Figure 3-25)

3. Remove the adjusting knob and face cover. Mark and drill mounting
holes. Mount thermostat using the screws provided. (Figure 3-27)

4. Install relay 1, always between OEM sleeper fan control and OEM
thermostat.

NOTE: The constant power supply wire must be of sufficient size to handle

sleeper fan motor electrical current draw.

5. Route sleeper fan harness from PCM to PROHEAT thermostat. Cut to length.
Connect white wire to terminal 1 of the thermostat.

6. Route a wire from terminal 2 of the thermostat to relay 1 (can be cut from left
over wire harness). Ground the relay using PROHEAT sleeper fan ground
wire (black).

VEHICLE

FUSE

PANEL

PROHEAT
THERMOSTAT

WHITE

SLEEPER FAN
HARNESS

PCM

WHITE

BLACK

OEM THERMOSTAT

15 AMP

RELAY 1 STANDARD
12 OR 24/30 AMP

RESISTOR ASSEMBLY

NOTE: MAY OR MAY NOT BE LOCATED

INSIDE SLEEPER HEATER ASSEMBLY

OEM

SLEEPER

HEATER

ASSEMBLY

(SINGLE WINDING TYPE)

CONSTANT POWER
SOURCE

(i.e. CIGARETTE LIGHTER)

OEM FAN

MOTOR

CONTROL

(2 OR 3 SPEED)

FAN MOTOR

SECTION 3. INSTALLATION

Figure 3-23 Option B

3-15

3.5.8

OPTION C – Auxiliary Sleeper Heater

1. Make sure the vehicle ignition is switched “OFF.”

2. Locate the auxiliary heater in a suitable area of the vehicle. Install plumbing

and air duct connections as per the manufacturer’s recommendations.

3. Locate the PROHEAT thermostat in a central area of the sleeper,
approximately 12″ above the bunk. Avoid direct air flow from sleeper fan
ducts. (Figure 3-25)

4. Remove the adjusting knob and face cover. Mark and drill mounting
holes. Mount thermostat using the screws provided. (Figure 3-27)

5. Route sleeper fan harness from PCM to PROHEAT thermostat. Cut to
length. Connect white wire to terminal 1 of the thermostat using the fork
terminal provided. Black wire is not used.

6. Route a wire from terminal 2 of the thermostat to an appropriate wire on
the sleeper fan motor. Make a splice connection and seal the splice with
tape or heat shrink.

NOTE: The electrical power and operation in this option is controlled by the

PROHEAT. See Option B should a relay be required to provide more
electrical power.

WARNING

Systems using a ground side
battery disconnect must install
a 10 Amp fuse to protect the
sleeper fan harness.

Thermostat Wire Connection Detail

Screw # Wire Colour

1 White (from PCM)
2 White (to sleeper heater)
3 Not used
4 Not used

PCM

SLEEPER FAN
HARNESS

SPLICE WIRES

FAN MOTOR
(MULTIPLE WINDING TYPE)

ORANGE

RED
(NOT USED)

B

H

W

K

C

A

L

TE

HI

W

ITE

THERMOSTAT

1

1

2

2

3

4

AUXILIARY
SLEEPER HEATER

10 AMP
FUSE

GROUND

3-16

Figure 3-24 Option C

PROHEAT INSTALLATION & SERVICE

INSTALLATION AND SE R V I C E M A N U A L

PROHEAT X45

Rev. H

CONTENTS

A. SAFETY .

B. INTRODUCTION .

…………………………………………………………………………. A-1

……………………………………………………………… B-1

C. MODEL DESCRIPTIONS…………………………………………………… C-1

1.0 TECHNICAL SPECIFICATIONS …………………………………………. 1-1

1.1 PHYSICAL – X45 …………………………………………………………… 1-2

1.2 ELECTRICAL – X45 ………………………………………………………… 1-4

1.3 TORQUE SPECIFICATIONS ……………………………………………….. 1-6

2.0 OPERATING YOUR PROHEAT HEATER………………………………. 2-1

3.0 INSTALLATION ……………………………………………………………….. 3-1

3.1 LOCATING THE HEATER ………………………………………………….. 3-2

3.1.1 Select Your Location ……………………………………………… 3-2

3.1.2 General considerations…………………………………………… 3-2

3.1.3 Mounting the Proheat Heater in an Enclosure………………. 3-3

3.2 MOUNTING THE HEATER …………………………………………………. 3-4

3.2.1 Option A – Heater With Enclosure ……………………………… 3-4

3.2.1 Option B – Heater Without Enclosure …………………………. 3-5

3.3 EXHAUST PIPE CONNECTION……………………………………………. 3-6

3.4 PLUMBING THE SYSTEM…………………………………………………. 3-7

3.4.1 General Considerations ………………………………………….. 3-7

3.4.2 Option A – Engine Heat or Supplemental Heat ……………… 3-8

3.4.3 Option B – Engine and Sleeper Heat ………………………….. 3-9

3.5 WIRING & ELECTRICAL CONNECTIONS……………………………… 3-10

3.5.1 General Considerations ………………………………………… 3-10

3.5.2 Power Connection to Batteries ……………………………….. 3-11

3.5.3 Timer Connections (Optional) …………………………………. 3-12

3.5.4 On/Off Switch Connections ……………………………………. 3-13

3.5.5 Sleeper Fan Model Heater Wiring Details ………………….. 3-14

3.5.6 Option A – OEM Heater & Proheat Thermostat ……………. 3-14

3.5.7 Option B – OEM Heater & Thermostat………………………. 3-15

3.5.8 Option C – Auxiliary Sleeper Heater………………………….. 3-16

3.5.9 Option D – Auxiliary Sleeper Heater Current Limited …….. 3-17

3.5.10 Auxiliary Input Model Heater Wiring Details………………. 3-18

3.5.11 Option A –

3.5.12 Option B –

3.5.13 Option C – Standard Mode & Supplemental Mode ………3-20

3.6 FUEL SYSTEM …………………………………………………………….. 3-22

3.6.1 General Considerations ………………………………………… 3-22

3.6.2 Option A – 1/4″ or 1/2″ NPT Port …………………………… 3-23

3.6.3 Option B – Existing Blank Fuel Sender Cover Plate ………. 3-24

3.6.4 Option C – Hole Drilled into Fuel Tank ………………………. 3-24

3.6.5 Installation ………………………………………………………… 3-25

3.7 FIRST TIME STARTUP……………………………………………………. 3-26

Preheat Mode Supplemental Mode Operation
Preheat and Supplemental Mode

………………. 3-20

… 3-19

4.0 PRINCIPLES OF OPERATION …………………………………………… 4-1

4-1 GENERAL DESCRIPTION ………………………………………………….. 4-1

4-2 MODES OF OPERATION …………………………………………………… 4-5

4.2.1 Standard Mode – All Models ……………………………………. 4-5

4.2.2 Preheat Mode – Aux Input Models Only ………………………. 4-6

4.2.3 Supplemental Mode – Aux Input Models Only ………………. 4-7

i

5.0 TROUBLESHOOTING & REPAIR .

5.0.1 Troubleshooting a Problem…………………………………. 5-1

.0.2 Example Proheat Behavior Error – Code 01…………….. 5-2

5

5-1 OPERATION INDICATORS, FUNCTION & COMPONENT

IAGNOSTICS …………………………………………………………. 5-3

D

5.1.1 Operation Indicators …………………………………………. 5-4

5.1.2 Function Diagnostics ………………………………………… 5-5

1 Start …………………………………………………………. 5-5

0

02 Flame Out ………………………………………………… 5-15

03 Coolant Flow …………………………………………….. 5-16

04 Overheat ………………………………………………….. 5-17

05 Voltage ……………………………………………………. 5-18

5.1.3 Component Diagnostics………………………………………… 5-19

06 Flame Sensor……………………………………………. 5-19

07 Temp Sensor ……………………………………………. 5-21

08 Fuel Pump………………………………………………… 5-23

09 Compressor ……………………………………………… 5-23

10 Ignition Coil………………………………………………. 5-25

11 Coolant Pump …………………………………………… 5-27

12 Blower …………………………………………………….. 5-30

13 Sleeper Fan ……………………………………………… 5-32

14 Hour Meter (Auxiliary Output)………………………… 5-33

5-2 COMPONENT MECHANICAL OR ELECTRICAL PROBLEMS ……….. 5-34

5.2.1 Fuel Nozzle ………………………………………………………… 5-34

5.2.2 Fuel Regulator…………………………………………………….. 5-34

5.2.3 Air Compressor …………………………………………………… 5-34

5.2.4 Fuel Pump …………………………………………………………. 5-34

5.2.5 Ignition Electrode ………………………………………………… 5-34

5.2.6 Coolant Pump …………………………………………………….. 5-34

5.2.7 Blower ………………………………………………………………. 5-34

5.2.8 Fuse ………………………………………………………………… 5-35

5-3 OPERATIONAL PROBLEMS ……………………………………………… 5-37

5.3.1 Smoking exhaust ………………………………………………… 5-37

5.3.2 Low heat output ………………………………………………….. 5-37

5.3.3 Engine temperature gauge reads low ……………………….. 5-37

5.3.4 Backfiring ………………………………………………………….. 5-37

………………………………………. 5-1

6.0 MAINTENANCE……………………………………………………………….. 6-1

6-1 WEEKLY MAINTENANCE ………………………………………………….. 6-1

6-2 ANNUAL MAINTENANCE ………………………………………………….. 6-1

6.2.1 Clean Heater Enclosure and Air Intake ……………………….. 6-2

6.2.2 Check Exhaust System …………………………………………… 6-3

6.2.3 Check Heat Exchanger……………………………………………. 6-3

6.2.4 Clean Flame Sensor ………………………………………………. 6-4

6.2.5 Check Cooling System ……………………………………………. 6-4

6.2.6 Check Batteries ……………………………………………………. 6-4

6.2.7 Check Fuel System………………………………………………… 6-5

6.2.8 Check Fuel Filter …………………………………………………… 6-5

6.2.9 Clean Nozzle………………………………………………………… 6-6

6.2.10 Replace Compressor Air Filter ………………………………… 6-6

6.2.11 Check Electrical System ……………………………………….. 6-7

6.2.12 Check Air Pressure ………………………………………………. 6-8

6.2.13 Check

Modes of Operation – Switch, Timer or OEM Signals

.. 6-8

7.0 APPENDICES …………………………………………………………………. 7-1

Bulletins 951528, 967329, SB0003, PB0034, SB0062

8.0 WARRANTY ……………………………………………………………………. 8-1

ii

PROHEAT INSTALLATION & SERVICE

A.

SAFETY

Throughout this manual, you will see notes labeled DANGER, WARNING,
CAUTION and NOTICE to alert you to special instructions or precautions

concerning a particular procedure that would be hazardous if performed
incorrectly or carelessly.

Observe them carefully!

These safety alerts alone cannot eliminate all hazards. Strict compliance
with these special instructions and common sense are major accident
prevention measures.

DANGER

Immediate hazards that will result
in severe injury or death.

WARNING

Hazards or unsafe practices that
could result in severe personal
injury or death.

CAUTION

Hazards or unsafe practices that
could result in minor injury or
product or property damage.

NOTICE

Information that is important to
proper installation or maintenance,
but is not hazard-related.

SECTION A. SAFETY

A-1

SAFETY CONSIDERATIONS

WARNING

WARNING

WARNING

WARNING

WARNING

WARNING

Exhaust

Inhalation of exhaust gas (containing carbon monoxide) may cause severe personal

injury and/or death. Anyone suspected of suffering from CO inhalation should be
removed from the hazardous area and given medical assistance immediately.

Explosion Hazard

Do not operate heater where combustible fumes or airborne particles, such as saw­dust, are present.

Fuel

Exercise extreme caution when working near fuel or fuel-filled equipment. Do not
operate heater during fueling operations. In addition, do not smoke or handle open
flame equipment, such as a blowtorch, around fuel.

Fire Hazard

Do not place any flammable items around the heater and exhaust pipe.

Batteries

Wear hand and eye protection when working near batteries. Do not smoke or use open
flames near batteries.

Electrical

Electric shock can cause severe personal injury, burns, and death. Before working on
any unit, disconnect the batteries. Use only approved materials and methods when
working on the electrical system and follow local electrical codes. Never work with
electricity in wet conditions or when you are feeling fatigued.

WARNING

WARNING

WARNING

DANGER

Poisons/Toxins

Fuel and coolant are toxic and in some cases, carcinogenic. Wear eye and hand
protection at all times. Remove contaminated clothing immediately and wash
contaminated skin. Do not breathe in vapors.

Moving/Hot Parts

Moving/hot parts can cause severe injury and or death. Before working on any unit,
shut it off. Do not operate any unit until protective covers have been replaced. Always
ensure bolts and clamps are correctly torqued and secured. Inspect mechanical com­ponents periodically for damage and corrosion.

Coolant

Never remove the filler cap when the engine is hot – escaping steam or scalding water
could cause serious personal injury. The coolant level in the expansion tank should be
checked at least weekly (more frequently in high mileage or arduous conditions). Always
check the level when the system is cold. Unscrew the filler cap slowly, allowing the
pressure to escape before removing completely. Never run the engine without coolant.

Prevent anti-freeze coming in contact with the skin or eyes. If this occurs, rinse
immediately with plenty of water. Anti-freeze will damage painted surfaces.

Never top-up with salt water. Even when travelling in territories where the water supply
contains salt, always ensure you carry a supply of fresh (rain or distilled) water.

California Proposition 65 Warning

Do not operate heater in garages or in other closed or unventilated areas.
Diesel exhaust and some of its constituents are known to the State of California to

cause cancer, birth defects, and other reproductive harm.
Electrical components in this product may contain lead, a chemical known to the

State of California to cause cancer and birth defects and other reproductive harm.

A-2

PROHEAT INSTALLATION & SERVICE

INTRODUCTIONB.

PROHEAT Model X45

This manual is provided to assist an authorized PROHEAT
dealer to install and service a PROHEAT heater. Although
trucks have been used in the examples, applications for
PROHEAT are by no means limited to trucks. PROHEAT
heaters are designed to be used on any diesel equipped
vehicle including: trucks, buses (school, transit and coach),
construction equipment, off road equipment, military
equipment and cargo.

PROHEAT heaters are used in the following applications:

(1) Engine Block Heat – PROHEAT will preheat an engine

block to ensure reliable starting in cold weather. At
the same time it may be used throughout the year to
reduce the wear associated with cold starts.

(2)

Cab or Sleeper Heat (engine off) – PROHEAT will supply
heat to the cab or sleeper. Drivers can sleep in comfort
not only in the cold of winter but also in the spring
and fall when the weather is miserable. Substantial
savings through reduced fuel consumption and engine
wear can be obtained by not idling the engine.

(3)

Supplemental Heat (engine running) – as the efficiency
of modern diesel engines are improved there is no
longer adequate reject heat available to heat the
vehicle’s interior. This is particularly true for buses.
PROHEAT can be used while the vehicle is operating
to provide supplemental heat for the interior.

(4) Cargo Heat – PROHEAT can be used to provide heat to

protect valuable cargo such as produce or beverages
from damage due to freezing.

(5) Marine – Marine applications typically involve the

engineering and installation of a complete hot-water
heating system of which PROHEAT is only one
component. Proheat recommends that only an
expert in marine hot-water heating systems install a
PROHEAT on a boat. It is the installer’s responsibility
to ensure that the installation complies with all
applicable regulations.

SECTION B. INTRODUCTION

B-1

B-2

PROHEAT INSTALLATION & SERVICE

C.

Sleeper Fan Output or Auxiliary Input
Identification.

MODEL DESCRIPTIONS

This manual covers all models of PROHEAT X45. Please refer to the X45 Parts
Book at www.proheat.com for detailed part descriptions and part numbers.
Included in the parts book are optional features such as a timer, sleeper fan

ontrol kit, impact switch (for school bus applications) and associated

c
installation and maintenance tools.

The following information describes the three general characteristics of X45
models covered in this manual: voltage, enclosure and Proheat Control Module
(PCM) options.

PROHEAT CONTROL MODULE (PCM): SLEEPER FAN
OUTPUT OR AUXILIARY INPUT

The PCM comes in either a sleeper fan output or auxiliary input model. The
sleeper fan model is limited to a 3 amp output and is generally installed on
trucks that require sleeper fan power (it is only available on 12 V models).
The

Auxiliary
Mode and Supplemental Mode. This operation is typically used for transit and
coach installation. Refer to page 4-2 for more information.

Input model uses two special input pins that allow for a Preheat

Voltage Identification.

VOLTAGE CONFIGURATION: 12 V OR 24 V

The X45 is available in either a 12 V or 24 V models.

ENCLOSURE

An optional enclosure provides environmental protection.

SECTION C. MODEL DESCRIPTIONS

C-1

C-2

PROHEAT INSTALLATION & SERVICE

1.0

TECHNICAL
SPECIFICATIONS

X45 12V X45 24V

RATING 45,000 BTU (13 kW)

YSTEM VOLTAGE 10 –15 VDC 20 – 30 VDC

S

ominal Voltage Range

N

CURRENT DRAW 7.5 Amps 3.75 Amps

FUEL CONSUMPTION

(Average to Maximum) 0.1 – 0.45 gal/hr. (0.4 – 1.7 L/hr.)

COOLANT FLOW 8.0 gal/min. (30 L/min.)

COOLANT TEMPERATURE (at Heater) 150°F to 185°F (65°C to 85°C)

OPERATING TEMPERATURE RANGE -40°F to +122°F (-40°C to +50°C)

IGNITION TYPE Electronic Spark Ignition

HEAT EXCHANGER CAPACITY 1 quart (0.95 L)

WEIGHT Heater ONLY 40 lbs (18 Kg)

WEIGHT Heater with Enclosure 55 lbs (25 Kg)

DIMENSIONS – HEATER (L x W x H) 18.9 x 11.2 x 10.6 inches

DIMENSIONS – ENCLOSURE (L x W x H) 20.2 x 12.3 x 10.5 inches

WARRANTY Two years parts and labor

(520 x 320 x 280 mm)

(513 x 313 x 267 mm)

DANGER

DO NOT use gasoline.

FUEL TYPES

COMPATIBLE Diesel (ULSD, #1, #2, Arctic), JP8, Jet A1

Bio Fuels – Contact Proheat www.proheat.com

SYSTEM OUTPUTS

HOUR METER Same as System Voltage

(AUXILIARY OUTPUT) Maximum 1 Amp draw (over-load shut-off protection)

High-side switched

SWITCH/TIMER Same as System Voltage
POWER Maximum 1 Amp draw (over-load shut-off protection)

High-side switched

SLEEPER FAN Same as System Voltage
(Certain Models Only) Maximum 3 Amp draw (over-load shut-off protection)

High-side switched

INDICATOR LIGHT Same as System Voltage

Maximum 1 Amp draw (over-load shut-off protection)
High-side switched

SYSTEM INPUTS

SWITCH 10 – 15 VDC (12V X45) | 20 – 30 VDC (24V X45)

Standard Run Mode
Preheat Run Mode (Certain Models Only)
Supplemental (Certain Models Only)

POWER 12 VDC or 24 VDC

SECTION 1. TECHNICAL SPECIFICATIONS

1-1

1.1

PHYSICAL – X45

X45 HEATER1.1.1

Figure 1-1 Heater Dimensions – X45

1-2

PROHEAT INSTALLATION & SERVICE

X45 WITH ENCLOSURE1.1.2

Figure 1-2 Heater Dimensions including Enclosure – X45

SECTION 1. TECHNICAL SPECIFICATIONS

1-3

1.2

ELECTRICAL – X45

Figure 1-3 Wiring Diagram – X45

1-4

PROHEAT INSTALLATION & SERVICE

Figure 1-4 PCM Electrical Connections – X45

SECTION 1. TECHNICAL SPECIFICATIONS

1-5

TORQUE SPECIFICATIONS1.3

FAN END CASTING

Apply anti-seize to bolts (3)

•

• Torque bolts (3) to 75±5 in/lbs (8.5±0.5 Nm)

REGULATOR

• Apply anti-seize to cap screw

• Torque cap screw to 94±6 in/lbs (10.6±0.7 Nm)

FLAME SENSOR

• Torque sensor to 25±3 in/lbs (2.8±0.3 Nm)

IGNITER

• Apply anti-seize to igniter threads

• Ensure gasket is present before installing

• Torque igniter to 50±5 in/lbs (5.6±0.6 Nm)

COMBUSTION TUBE

• Apply anti-seize to cap screws

• Torque cap screws (4) to 25±3 in/lbs (2.8±0.3 Nm)

1-6

PROHEAT INSTALLATION & SERVICE

OVERHEAT SENSOR

• Lubricate o-ring with o-ring lubricant

• Torque senor to 500±50 in/lbs (56±5.6 Nm)

TEMPERATURE SENSOR

• Lubricate o-ring with o-ring lubricant

• Torque senor to 25±3 in/lbs (2.8±0.3 Nm)

AIR FILTER

• Torque cap screw to 50±5 in/lbs (5.6±0.6 Nm)

SECTION 1. TECHNICAL SPECIFICATIONS

BLOWER ASSEMBLY

• Apply anti-seize to bolts (4)

• Torque bolts (4) to 25±3 in/lbs (2.8±0.3 Nm)

PROHEAT CONTROL MODULE (PCM)

• Apply anti-seize to bolts (3)

• Torque bolts (3) to 75±7 in/lbs (8.5±0.8 Nm)

1-7

MAIN INTERNAL HARNESS

• Torque bolt (1) to 10±2 in/lbs (1.1 +/- 0.2)

NOZZLE TO FAN END

• Lubricate o-ring on nozzle with diesel

• Torque nozzle to 150±10 in/lbs (17±1.1 Nm)

NOZZLE REASSEMBLY

• Torque nozzle (1) to 30±3 in/lbs (3.4±0.3 Nm)

BAND CLAMPS

• Torque clamps (4) to 25±3 in/lbs (2.8±0.3 Nm)

ENCLOSURE LID (Optional)

• Anti-seize recommended on bolts

• Torque clamps (2) to 30±3 in/lbs (3.4±3.4 Nm)

1-8

PROHEAT INSTALLATION & SERVICE

HARNESS GROUND LUG

• Apply anti-seize to bolt

• Torque bolt (1) to 75±5 in/lbs (8.5±0.5 Nm)

FUEL PUMP ASSEMBLY

A

• Apply Loctite 242 to threads

• Torque bolts (2) to 25±3 in/lbs (2.8±0.3 Nm).

B

• Lubricate o-ring with diesel fuel

• Torque relief valve to 22±2 in/lbs (2.5±0.2 Nm).

C

• Apply Loctite 59241 sealant to threads

• Torque elbow (1) to 55±5 in/lbs (6.2±0.5 Nm) minimum or until
elbow is at correct orientation

FUEL FILTER

• Lubricate o-ring with diesel fuel

• Torque nut (1) to 150±10 in/lbs (17±1.1 Nm)

SECTION 1. TECHNICAL SPECIFICATIONS

1-9

1-10

PROHEAT INSTALLATION & SERVICE

2.0

OPERATING YOUR
PROHEAT HEATER

NOTICE

These instructions cover Standard
Mode operation that are normally
installed on trucks. To operate your
heater in Preheat or Supplemental,
refer to page 3-18 to page 3-20 and
page 4-6 to page 4-7.

NOTICE

Regular use of your PROHEAT
throughout the year will improve
its reliability. Weekly operation is
recommended.

NOTICE

The PROHEAT heater can be
operated by either using a toggle
switch or a 7 day timer.
Refer to page 3-10 for WIRING &
ELECTRICAL CONNECTIONS.

ENGINE HEAT ONLY

1. Switch the ON/OFF switch located in the vehicle dash to “ON.”

The switch will light and the heater will cycle on. It will continue to operate until
the coolant reaches 185˚F (85˚C) at the heater outlet and then cycle “OFF.”

When the coolant temperature falls below 150˚F (65˚C) at the heater
outlet, it will refire and repeat the cycle.
It will continue to cycle until:

a) the heater is switched “OFF,”
b) the heater runs out of fuel,
c) the vehicle battery voltage drops below 10.0 Volts, or
d) an error occurs and the switch light flashes

(See Troubleshooting & Repair, Section 5)

NOTE: The PROHEAT may be operated if the engine is running or not running.

2. When engine preheat is no longer required, switch the PROHEAT heater

“OFF.”

ENGINE AND SLEEPER HEAT

1. Switch the ON/OFF switch located in the vehicle dash to “ON.”

The switch will light and the heater will cycle on. It will continue to operate until
the coolant reaches 185˚F (85˚C) at the heater outlet and then cycle “OFF.”

When the coolant temperature falls below 150˚F (65˚C) at the heater
outlet, it will refire and repeat the cycle.
It will continue to cycle until:

a) the heater is switched “OFF,”
b) the heater runs out of fuel,
c) the vehicle battery voltage drops below 10.0 Volts, or
d) an error occurs and the switch light flashes

(See Troubleshooting & Repair, Section 5)

SECTION 2. OPERATING YOUR PROHEAT HEATER

NOTE: The PROHEAT may be operated if the engine is running or not running.

2. For sleeper heat – set the thermostat in the sleeper to the desired
temperature. If the set temperature is higher than the temperature in the
sleeper the fan will cycle “ON.” When the air reaches the set temperature
the fan will cycle “OFF.” The fan will cycle “ON” and “OFF” to maintain the
set temperature.

3. When engine and/or sleeper preheat is no longer required, switch the
PROHEAT heater “OFF.”

2-1

2-2

PROHEAT INSTALLATION & SERVICE

3.0

INSTALLATION

NOTICE

If additional installation information is
required
Dealer regarding your specific
application.

For more technical information,
please contact PROHEAT Product
Support at www.proheat.com

please contact your PROHEAT

The installation details described in this manual focuses on truck applications
and does not cover all of the possible installations. As seen in the figures
below, the PROHEAT X45 is installed on a variety of equipment including
trucks, school buses, coaches, drill rigs, mine dump trucks and excavators.
In these cases the manual should be used as a guideline only.

There are seven major steps that must be completed to successfully install
the PROHEAT heater.

3.1 LOCATING THE HEATER………………………………………………… page 3-2

3.2 MOUNTING THE HEATER ………………………………………………. page 3-4

3.3 EXHAUST PIPE CONNECTION …………………………………………. page 3-6

3.4 PLUMBING THE SYSTEM………………………………………………. page 3-7

3.5 WIRING & ELECTRICAL CONNECTIONS …………………………… page 3-10

3.6 FUEL SYSTEM ………………………………………………………….. page 3-22

3.7 FIRST TIME STARTUP…………………………………………………. page 3-26

Prior to the installation of your PROHEAT, consult your engine owner’s manual
or engine manufacturer for any restrictions or changes that may apply to
plumbing into the engine coolant system.

Figure 3-1 Other Applications.

SECTION 3. INSTALLATION

3-1

3.1

LOCATING THE HEATER

3.1.1

You Choose



CAUTION

Do not weld PROHEAT heater
mounting brackets to the
vehicle frame.

If repairs to the vehicle require
welding, disconnect the PROHEAT
power cable at the PCM. This will
prevent damage to the PROHEAT
electronics.

SELECT YOUR LOCATION

The most suitable location for mounting the heater will vary depending
on the type of vehicle. Recommended mounting locations are:

• Behind the cab across the frame rails (1).

• On either side of the frame rails (2).

• In an existing enclosure on the vehicle (step or toolbox) (3).

1

2

3

2

Figure 3-2 Recommended Mounting Positions

3.1.2

WARNING

Never locate the heater inside
the vehicle cab. (See Figure 3-3)

GENERAL CONSIDERATIONS

• Never mount the heater to two separate parts of the vehicle.

• Avoid mounting the heater in areas of excessive vibration.

• Do not mount the heater directly to the engine.

• Do not mount the heater beneath a wood floor without a proper fire wall
above the heater.

• Avoid mounting the heater in areas of excessive dust, dirt and moisture
accumulation.

• The heater must be easily accessed for service.

COOLANT OUT

FUEL IN

Figure 3-3

MINIMUM
CLEARANCE 6″

Figure 3-4 Allow minimum 6″ clearance

for hose connections.

COOLANT IN

3-2

PROHEAT INSTALLATION & SERVICE

Heater must be mounted below the highest point in the cooling system. An
expansion tank may be added to the coolant system above the heater if this
is not possible.

HIGHEST POINT IN
COOLING SYSTEM

HEATER MUST
BE MOUNTED
BELOW
HIGHEST POINT

PROHEAT ENGINE OR RADIATOR

Figure 3-5 Height Requirement

3.1.3

MOUNTING THE PROHEAT HEATER IN AN ENCLOSURE

Do not locate the heater in an
airtight enclosure. If the heater is to
be mounted in an enclosure other
than the PROHEAT enclosure,
adequate air flow must be provided
to ensure proper combustion. The
enclosure must also be adequately
ventilated so that the ambient
temperature inside the enclosure
does not exceed 185 °F (85 °C).
The openings must be positioned to prevent moisture dirt and snow from
accumulating in the enclosure. The heater enclosure must be easily
accessed for servicing of the heater.

Heater must be mounted within 5˚ of horizontal, as shown.

Figure 3-6 Adequate Air Flow

SECTION 3. INSTALLATION

5˚

5˚

Figure 3-7 Mounting Angle

5˚
5˚

3-3

3.2

MOUNTING THE HEATER

Select Your Mounting Option

Figure 3-8 Mounting Tray

3.2.1

OPTION A

1. Remove the enclosure cover.

2. Drill the (4) mounting holes and exhaust pipe clearance hole.

3. Using the bolts supplied, fasten the enclosure to the mounting

tray or brackets.

4. Ensure that the combustion tube can be removed for service.

See Figure 1-2 on page 1-3 for service space requirements.

– Heater With Enclosure

20″ (508 mm)

1 5/8″

(45 mm)

3″ (76 mm) Dia.

5″ (127 mm)

12″

(306 mm)

5 3/4″ (146 mm)

3/4″ (20 mm) MOUNTING HOLES
(4 REQUIRED)

Figure 3-9 X45 Enclosure Base Dimensions

5″ (127 mm)

CENTERLINE OF ENCLOSURE

8 13/16″

(223 mm)

5″ (127 mm)

16 11/16″ (427 mm)

1 5/8″ (45 mm)

3-4

PROHEAT INSTALLATION & SERVICE

NOTICE

3.2.2

OPTION B

– Heater Without Enclosure

Heater supplied without an enclosure (mount in an existing enclosure on the
vehicle ie. tool box). Heater supplied with an auxiliary mounting plate.

Use anti-seize compound on fasteners
to prevent galling and corrosion.

3″ (76 mm) Dia.

. Ensure that the proposed enclosure is big enough for the heater.

1

2

1

⁄2W x 11H x 201⁄2L inches (318 x 280 x 521 mm)

12

. Using the indicated dimensions, drill the (4) mounting holes

and exhaust pipe clearance hole.

3. Ensure that the combustion tube can be removed for service.

See Figure 1-2 on page 1-3 for service space requirements.

8.5″ (216 mm)

1.0″ (25 mm)

4 X .38″ (10MM)
MOUNTING HOLES

5″

(127 mm)

2.02″

(51 mm)

Figure 3-10 X45 Mounting Plate Dimensions & Exhaust Hole

5.5″

(140 mm)

6.4″

(163mm)

5″ (127 mm)

7.5″ (191 mm)

SECTION 3. INSTALLATION

3-5

3.3

NOTICE

If additional information is required,
please contact your PROHEAT Dealer
regarding your specific application.
Alternatively, please contact PROHEAT
Product Support at www.proheat.com.

EXHAUST PIPE CONNECTION

1. Push the exhaust pipe through the hole in the enclosure and onto the

exhaust outlet port of the heater. Ensure that the pipe is pushed onto
the spigot at least 11⁄2» (38 mm).

2. Route the exhaust pipe such that:

• exhaust gasses do not enter the passenger compartment.

• exhaust gasses do not enter the heater’s combustion air inlet

• exhaust system does not rest against or be directed toward any parts
of the vehicle that may be damaged by heat (i.e. brake lines, seals, wires
rubber hoses or bumpers). The exhaust pipe may be have to be insulated
if it’s within 6″ of combustible materials or composite body parts

• the exhaust outlet does not face the same direction as vehicle travel

• debris and snow will not plug the outlet

• the exhaust pipe is protected from curb damage

• the exhaust system should have a downwards slope for condensation
to drain. If needed a 3/8″ hole should be drilled into the exhaust pipe
at the lowest point so that the condensation will drain.

3. Disassemble the exhaust pipe clamp and apply anti-seize compound to
the threads.

4. Assemble the exhaust clamp over the exhaust pipe (clamp goes inside
the enclosure) and tighten the nuts.

,

WARNING

Exhaust gases must not enter
the vehicle interior. Direct
exhaust pipe away from vehicle.

NOTICE

Use of muffler or other restrictions in the
exhaust system is not recommended.

NOTE: 11⁄2» exhaust pipe should not exceed 5 ft and have no more than

180 degrees of bends. The bends must be formed for best results.
Do not use 90 degree welded pipe to turn corners.

Use formed elbows.

Do not use welded
90˚ elbows.

DIRECTION
OF VEHICLE
TRAVEL

EXHAUST CLAMP
U BOLT (APPLY
ANTI-SEIZE
COMPOUND
TO THREADS)

3-6

ENSURE THERE ARE
NO AIR LEAKS AROUND
THE CONNECTION

Figure 3-11 Exhaust Pipe

PROHEAT INSTALLATION & SERVICE

3.4

PLUMBING THE SYSTEM

MA

X

I

MUM

C

ROS

S

—

F

Figure 3-12 Maximum cross-flow

3.4.1

L

OW

GENERAL CONSIDERATIONS

Coolant flow must be maintained throughout the coolant system

nder all conditions.

u

• Keep the engine inlet and outlet ports as far apart as possible to maximize

cross-flow through engine.

• Coolant pump and engine water pump must flow in the same direction.

• Ensure that no sharp kinks or bends exist in the hoses which may restrict

coolant flow.

• Avoid high points in the hose routing to prevent air traps.

• For systems requiring more than 50 feet of coolant line, contact Proheat

Product Support at www.proheat.com for coolant pump recommendations.

For plumbing the system use:

1

⁄2» NPT pipe fittings or bigger.

3

⁄4» ID heater hose.

NOTE: Use of silicone hose requires special hose clamps.

Shut-off valves are not required at the engine inlet and outlet connections but
may be used if desired. They should be left open at all times so that the heater
can be operated throughout the year.

You Choose



Select Your Plumbing Option

Option A:

Engine heat or supplemental heat.

The PROHEAT heats the engine block only.

NOTE: When the engine block is preheated you will have nearly

instant heat from the dash heat exchanger.

Option B: Engine and sleeper heat.

The PROHEAT heats the engine block and the sleeper.

NOTE: Plumbing the PROHEAT through the dash fan is not

recommended.

SECTION 3. INSTALLATION

3-7

Instructions for Options A and B

WARNING

Opening the radiator cap when
the engine is hot may cause
serious injury.

3.4.2

1. Remove the radiator cap to release the system pressure.

2. Drain the coolant system.

3. Plumb the system as per Figure 3-13 or Figure 3-15

. Add engine coolant to the system as per the specific engine

4

manufacturer’s recommendations and re-install the radiator cap.

NOTE: Plumbing the PROHEAT through the dash fan is not recommended.

OPTION A – Engine Heat or Supplemental Heat

DASH HEATER

RETURN TO ENGINE

RETURN TO ENGINE

SUPPLY TO PROHEAT

SUPPLY TO PROHEAT

Figure 3-13 Engine Heat or Supplemental Heat

ENGINE

NOTE: On coolant systems where the return from the PROHEAT is plumbed to

the bottom of the main coolant supply line from the radiator to engine
pump, the return line must be moved to avoid loss of heat through the
radiator.

ENGINE

RETURN TO ENGINE

SUPPLY TO PROHEAT

ENGINE

Figure 3-14 Correct Return Line Plumbing

3-8

PROHEAT INSTALLATION & SERVICE

3.4.3

or best results these vehicles

F
should use an auxiliary heater.

International with single heater

OPTION B – Engine and Sleeper Heat

OEM OR AUXILIARY
SLEEPER HEATER

DASH HEATER

For vehicles with solenoid valves
in the normally closed position.

Western Star

SOLENOID VALVE
OEM COMBO HEATERS
ONLY (NORMALLY OPEN)

SUPPLY TO PROHEAT

Figure 3-15 Engine and Sleeper Heat

RETURN TO ENGINE

ENGINE

NOTE: Vehicles equipped with a combination heater/air-conditioner will have

a solenoid operated shut-off valve in the heater unit. Typically this valve
is normally open with the truck engine turned off and the key removed.

(See Figure 3-16 for plumbing)

Due to the many options available in vehicle heating and air
conditioning systems, the installer should be looking for any
restrictions that may affect coolant flow, with vehicle ignition in the
“OFF” position.

SLEEPER HEATER

SOLENOID VALVE
(NORMALLY CLOSED)

DASH HEATER

NOTICE

The PROHEAT PCM sleeper fan circuit
has a one minute delay during ignition.
Power to open a sleeper fan coolant
valve must be taken from another
source such as the wire for the hour
meter (auxiliary output). (See PROHEAT

Wiring Diagram on page 1-4.)

SECTION 3. INSTALLATION

SUPPLY TO PROHEAT

Figure 3-16 Engine and Sleeper Heat

RETURN TO ENGINE

ENGINE

3-9

3.5

WIRING & ELECTRICAL
CONNECTIONS

3.5.1

Figure 3-17 Test Battery

WARNING

Do not use on positive ground
vehicles.

GENERAL CONSIDERATIONS

• Prior to installation of the PROHEAT Heater system, ensure that the

vehicle batteries are in good condition.

• Do not kink or abrade wires when routing them through the vehicle during

installation.

• Ensure wires are well supported and secured with tie-wraps.

• Do not use acid core solder when making solder connections.

Major Electrical Connections Required

a) Power connection to batteries …………………………………………. page 3-11

b) Timer or ON/OFF switch connections…………………………………. page 3-12

c) Sleeper fan model heater connections (optional)………………….. page 3-14

d) Auxiliary Input model heater connections (optional)……………….. page 3-18

TO SLEEPER FAN OR AUX INPUT
DEPENDING ON MODEL

CAUTION

If repairs to the vehicle require
welding, disconnect the PROHEAT
power cable at the PCM. This will
prevent damage to the PROHEAT
electronics.

CAUTION

Vehicles using ground side battery
disconnect switches must install an
in-line 10 Amp fuse on the internal
harness (Proheat part # PK0310).
This will prevent damage to the
harness and PCM, (refer to Service
Bulletin SB0003 in Appendix).

TO BATTERIES

TO ON/OFF SWITCH
AND/OR TIMER

Figure 3-18 Major Electrical Connections

3-10

PROHEAT INSTALLATION & SERVICE

3.5.2

CAUTION

2 Volt products should not use

1
power split from a 24 Volt system.
This will cause uneven charging of
the batteries.

POWER CONNECTION TO BATTERIES

1. Route wire harness from PCM to the battery. Cut the harness to length

as required.

2. Strip outer wire jacket of harness back to expose the positive (red) and

negative (black) leads. Strip the leads as shown and crimp the ring
tongue terminals supplied to the wires. Connect the leads to the battery

erminals. (See Figure 3-19.)

t

NOTICE

Systems providing heat to both engine
and sleeper require four (4) batteries.

3. Leave power harness disconnected. (See Figure 3-19.) Do not install until

PROHEAT coolant pump system has been purged of air. (See First Time

Startup, page 3-26)

NOTE:

When power is connected to the PCM, all segments of the LED will flash
on the PCM. This indicates that power has been supplied. See page 5-4
for more information.

NOTE: Ensure the battery terminals are clean and free of corrosion. Remove

and clean. Prior to re-connecting grease terminals with electrically
conductive grease.

STRIP WIRE AS SHOWN AND
CRIMP TO TERMINAL

3/16″

POWER SUPPLY
HARNESS

BLACK (-) NEGATIVE

RED (+) POSITIVE

Figure 3-19 Power Connection to Battery

SECTION 3. INSTALLATION

3-11

3.5.3

CAUTION

The switch input circuit should only
be used to supply power to the
ON/OFF Switch, the Timer, or as a
signal to trip a relay. Failure to
follow this installation practice will
result in damage to the PCM.

NOTICE

The PCM must be reset (power
disconnected and reconnected)
when changing from a Timer to an
ON/OFF Switch or from an ON/OFF
Switch to a Timer.

Do not connect an ON/OFF Switch
and a Timer in the same circuit.

TIMER CONNECTIONS (OPTIONAL)

Black wire Ground
Red wire Power
White wire Operational signal from heater
Green wire “ON” Signal to heater
Grey wire Keyswitch backlighting (optional)

Figure 3-20 Timer Connections

3-12

PROHEAT INSTALLATION & SERVICE

3.5.4

ON/OFF SWITCH CONNECTIONS

1. Select a suitable location in the vehicle dash for the ON/OFF Switch.

CAUTION

The switch input circuit should only
be used to supply power to the
ON/OFF Switch, the Timer, or as a
signal to trip a relay. Failure to
follow this installation practice will
result in damage to the PCM.

NOTICE

The PCM must be reset (power
disconnected and reconnected)
when changing from a Timer to an
ON/OFF Switch or from an ON/OFF
Switch to a Timer.

Do not connect an ON/OFF Switch
and a Timer in the same circuit.

DASH

1/2″ DIA.
HOLE

SWITCH
LABEL

NOTE: Many dash panels have switches which are not utilized. It may be

convenient to remove one and replace it with the PROHEAT switch.

2. Drill a1⁄2» diameter hole through the dash for the switch. Make sure you

have clearance behind the dash for the switch wires and connections.
Install the switch as per the diagram. (Figure 3-21)

3. Route the switch wire harness from the PCM to the dash panel. You will

have to pass the wire harness through the vehicle firewall. If possible use
an existing hole. Use a grommet to prevent the wire from being damaged
when it is passed through the hole.

4. Cut the harness to length.

5. Strip outer wire jacket of harness back to expose the 4 wires. Strip the

wires as shown and crimp the supplied1⁄4» spade terminals.

NOTE: Use fully insulated disconnects when connecting Switch.

ON/OFF
SWITCH

NUT

Figure 3-21 ON/OFF Switch Assembly

Figure 3-22 ON/OFF Switch Connections

6. Connect the terminals to the switch as shown. (Figure 3-22)

NOTE: The PCM must be reset (power disconnected and reconnected) when

changing from a Timer to an ON/OFF Switch or from an ON/OFF Switch
to a Timer. Connecting an ON/OFF Switch and a Timer in the same
circuit will cause the indicator light to flash incorrectly.

SECTION 3. INSTALLATION

3-13

3.5.5

SLEEPER FAN MODEL HEATER WIRING DETAILS

NOTICE

These instructions require a Sleeper
Fan model. For more information see

age 4-2.

p

You Choose



NOTICE

Sleeper Fan output does not supply
power during ignition (1 minute after
switch ON). DO NOT use for controlling
coolant valves. See page 4-5 for
operational sequence information.

The Hour Meter (Auxiliary) Output may
be used to control supplemental relays
to turn on coolant valves.

If additional installation information is
required, please contact your PROHEAT
Dealer or Product Support at
www.proheat.com

These installation options allow the operator to:

1. Run the PROHEAT with the ignition key in the “OFF” position.

2. Return full control to the OEM system in normal operation mode.

Select one of the following wiring options

NOTE: PROHEAT IS NOT RESPONSIBLE FOR CHANGES IN SLEEPER

FAN SYSTEMS BY ORIGINAL EQUIPMENT MANUFACTURING
COMPANIES.

Due to the wide variety of wiring schematics that exist, we emphasize that
if you are in any doubt you should contact your dealer or PROHEAT Product
Support at www.proheat.com

Option A: Used when climate control systems in sleepers require one or

more of the following features to be controlled.

1. Normal OEM fan speed selection.

2. A separate thermostat is required to turn the sleeper fan
motor “ON” and “OFF” because the OEM system uses a
constant running fan.

3.

A valve in the sleeper heater coolant line regulates the flow
must be fully opened when the PROHEAT is running.

4. Prevent possible back-feeding on ground side switched
systems.

and

3.5.6

Option B: Used in larger sleepers requiring greater fan speed to provide

sufficient air movement to the sleeper. This allows the driver to
select the fan speed.

Option C: Used when a dedicated auxiliary heater is required.

Option D: Limits the power provided to the sleeper fan motor to

3 Amps. With this system the total electrical draw is controlled
by PROHEAT.

NOTE: For larger systems in the latest model trucks this may not provide

enough fan speed and therefore Option A, B or C should be used.

OPTION A – OEM Heater & Proheat Thermostat

Please go to www.proheat.com for equipment specific installation instructions.

3-14

PROHEAT INSTALLATION & SERVICE

3.5.7

OPTION B – OEM Heater & Thermostat

1. Make sure the vehicle ignition is switched “OFF.”

2. Locate the PROHEAT thermostat in a central area of the sleeper,

approximately 12″ above the bunk. Avoid direct air flow from sleeper fan
ducts. (Figure 3-25)

3. Remove the adjusting knob and face cover. Mark and drill mounting
holes. Mount thermostat using the screws provided. (Figure 3-27)

4. Install relay 1, always between OEM sleeper fan control and OEM
thermostat.

NOTE: The constant power supply wire must be of sufficient size to handle

sleeper fan motor electrical current draw.

5. Route sleeper fan harness from PCM to PROHEAT thermostat. Cut to length.
Connect white wire to terminal 1 of the thermostat.

6. Route a wire from terminal 2 of the thermostat to relay 1 (can be cut from left
over wire harness). Ground the relay using PROHEAT sleeper fan ground
wire (black).

VEHICLE

FUSE

PANEL

PROHEAT
THERMOSTAT

WHITE

SLEEPER FAN
HARNESS

PCM

WHITE

BLACK

OEM THERMOSTAT

15 AMP

RELAY 1 STANDARD
12 OR 24/30 AMP

RESISTOR ASSEMBLY

NOTE: MAY OR MAY NOT BE LOCATED

INSIDE SLEEPER HEATER ASSEMBLY

OEM

SLEEPER

HEATER

ASSEMBLY

(SINGLE WINDING TYPE)

CONSTANT POWER
SOURCE

(i.e. CIGARETTE LIGHTER)

OEM FAN

MOTOR

CONTROL

(2 OR 3 SPEED)

FAN MOTOR

SECTION 3. INSTALLATION

Figure 3-23 Option B

3-15

3.5.8

OPTION C – Auxiliary Sleeper Heater

1. Make sure the vehicle ignition is switched “OFF.”

2. Locate the auxiliary heater in a suitable area of the vehicle. Install plumbing

and air duct connections as per the manufacturer’s recommendations.

3. Locate the PROHEAT thermostat in a central area of the sleeper,
approximately 12″ above the bunk. Avoid direct air flow from sleeper fan
ducts. (Figure 3-25)

4. Remove the adjusting knob and face cover. Mark and drill mounting
holes. Mount thermostat using the screws provided. (Figure 3-27)

5. Route sleeper fan harness from PCM to PROHEAT thermostat. Cut to
length. Connect white wire to terminal 1 of the thermostat using the fork
terminal provided. Black wire is not used.

6. Route a wire from terminal 2 of the thermostat to an appropriate wire on
the sleeper fan motor. Make a splice connection and seal the splice with
tape or heat shrink.

NOTE: The electrical power and operation in this option is controlled by the

PROHEAT. See Option B should a relay be required to provide more
electrical power.

WARNING

Systems using a ground side
battery disconnect must install
a 10 Amp fuse to protect the
sleeper fan harness.

Thermostat Wire Connection Detail

Screw # Wire Colour

1 White (from PCM)
2 White (to sleeper heater)
3 Not used
4 Not used

PCM

SLEEPER FAN
HARNESS

SPLICE WIRES

FAN MOTOR
(MULTIPLE WINDING TYPE)

ORANGE

RED
(NOT USED)

B

H

W

K

C

A

L

TE

HI

W

ITE

THERMOSTAT

1

1

2

2

3

4

AUXILIARY
SLEEPER HEATER

10 AMP
FUSE

GROUND

3-16

Figure 3-24 Option C

PROHEAT INSTALLATION & SERVICE

PH0404: Same as PH0401 excluding sleeper control kit – 24 Volt

PK0001 – 7-Day Timer