Proheat M50 G-II PCM User manual

G-II PCM SERVICE MANUAL
M50, M80/90 & M105/125
SERIAL NUMBERS
G-II PCM MODEL HEATERS: 705000 – TO DATE
AND ALL MODELS EQUIPPED WITH A
G-II REPLACEMENT PCM
Rev. C

CONTENTS
A. SAFETY ...................................................................................... A-1
SAFETY CONSIDERATIONS ..............................................................A-2
B. INTRODUCTION ......................................................................... B-1
C. PROHEAT CONTROL MODULE (PCM) TYPE ............................ C-1
D. COMPRESSOR TYPE ................................................................ D-1
E. MODEL DESCRIPTIONS ............................................................ E-1
1. TECHNICAL SPECIFICATIONS .................................................. 1-1
1.1 PHYSICAL .............................................................................. 1-2
1.2 G-II PCM ELECTRICAL ............................................................. 1-8
1.3 TORQUE SPECIFICATIONS ....................................................... 1-9
2. PRINCIPLES OF OPERATION ................................................... 2-1
2.1 COMPONENT DESCRIPTION .................................................... 2-1
2.2 THEORY OF OPERATION .......................................................... 2-4
2.3 MODES OF OPERATION .......................................................... 2-6
2.3.1 Standard Mode............................................................2-6
2.3.2 Preheat Mode............................................................. 2-7
2.3.3 Supplemental Mode.................................................... 2-8
3. MAINTENANCE TOOLS ............................................................. 3-1
4. TROUBLESHOOTING AND REPAIR........................................... 4-1
4.1 SYSTEM AND COMPONENT DIAGNOSTICS................................ 4-2
4.1.1 EXAMPLE PROHEAT BEHAVIOR ERROR – Code 1 ........... 4-4
4.1.2 START Diagnosti Code 1............................................ 4-5
4.1.3 FLAME OUT Diagnosti Code 2 .................................. 4-23
4.1.4 COOLANT FLOW Diagnosti Code3 ............................. 4-24
4.1.5 OVERHEAT Diagnosti Code 4.................................... 4-25
4.1.6 VOLTAGE Diagnosti Code 5...................................... 4-26
4.1.7 FLAME FAULT Diagnosti Code 6 ............................... 4-27
4.1.8 TEMP SENSOR/COOLANT FLOW
Diagnosti Code 7 .................................................... 4-27
4.1.9 FUEL SOLENOID VALVE Diagnosti Code 8 ................. 4-29
4.1.10 NOT USED Diagnosti Code 9.................................... 4-29
4.1.11 IGNITION MODULE Diagnosti Code 10 ...................... 4-30
4.1.12 COOLANT PUMP Diagnosti Code 11.......................... 4-31
4.1.13 MOTOR Diagnosti Code 12 ...................................... 4-32
4.1.14 AUXILIARY OUTPUT Diagnosti Code 13 ..................... 4-34
4.1.15 ACCESSORY/SWITCH OUTPUT Diagnosti Code 14 ..... 4-34
4.1.16 INDICATOR OUTPUT Diagnosti Code 15 .................... 4-35
4.1.17 SYSTEM CURRENT Diagnosti Code 16...................... 4-35
4.1.18 MOTOR SPEED SENSOR Diagnosti Code 17 .............. 4-35
4.1.19 CANbus ERROR Diagnosti Code 18 .......................... 4-35
i
PROHEAT M-SERIES G-II PCM SERVICE MANUAL

4.2 COMPONENT MECHANICAL OR ELECTRICAL PROBLEMS.......... 4-36
4.2.1 Fuel Nozzle .............................................................. 4-36
4.2.2 Fuel Solenoid Valve .................................................. 4-36
4.2.3 Fuel Regulator .......................................................... 4-36
4.2.4 Air Compressor......................................................... 4-36
4.2.5 Fuel Supply Pump ..................................................... 4-36
4.2.6 Ignition Ele trodes .................................................... 4-36
4.2.7 G-II PCM Fuse........................................................... 4-36
4.3 OPERATIONAL PROBLEMS..................................................... 4-36
5. MAINTENANCE .......................................................................... 5-1
5.1 WEEKLY MAINTENANCE .......................................................... 5-1
5.2 ANNUAL MAINTENANCE .......................................................... 5-2
5.3 ROTARY VANE COMPRESSOR SERVICE & VANES INSTALLATION .... 5-7
6. PROHEAT WARRANTY .............................................................. 6-1
ii PROHEAT M-SERIES G-II PCM SERVICE MANUAL

SAFETYA.
Throughout this manual, you will see notes labeled DANGER,WARNING,
CAUTION, and NOTICE to alert you to spe ial instru tions or pre autions
on erning a parti ular pro edure that would be hazardous if performed
in orre tly or arelessly.
Observe them arefully!
These safety alerts alone annot eliminate all hazards. Stri t omplian e
with these spe ial instru tions and ommon sense are major a ident
prevention measures.
DANGER
Imme iate hazar s that will result
in severe injury or eath.
WARNING
Hazar s or unsafe practices that
coul result in severe personal
injury or eath.
NOTICE
Information that is important to
proper installation or maintenan e,
but is not hazard-related.
CAUTION
Hazar s or unsafe practices that
coul result in minor injury or
pro uct or property amage.
A-1
PROHEAT M-SERIES G-II PCM SERVICE MANUAL

SAFETY CONSIDERATIONS
Exhaust
Inhalation of exhaust gas ( ontaining arbon monoxide) may ause severe personal
injury and/or death. Anyone suspe ted of suffering from CO inhalation should be
removed from the hazardous area and given medi al assistan e immediately.
Explosion Hazar
Do not operate heater where ombustible fumes or airborne parti les, su h as saw-
dust, are present.
Fuel
Exer ise extreme aution 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, su h as a blowtor h, around fuel.
Fire Hazar
Do not pla e any flammable items around the heater and exhaust pipe.
Batteries
Wear hand and eye prote tion when working near batteries. Do not smoke or use open
flames near batteries.
Electrical
Ele tri sho k an ause severe personal injury, burns, and death. Before working on
any unit, dis onne t the batteries. Use only approved materials and methods when
working on the ele tri al system and follow lo al ele tri al odes. Never work with
ele tri ity in wet onditions or when you are feeling fatigued.
Poisons/Toxins
Fuel and oolant are toxi and in some ases, ar inogeni . Wear eye and hand
prote tion at all times. Remove ontaminated lothing immediately and wash
ontaminated skin. Do not breathe in vapors.
Moving/Hot Parts
Moving parts an ause severe injury and or death. Before working on any unit, shut it
off. Do not operate any unit until prote tive overs have been repla ed. Always ensure
bolts and lamps are orre tly torqued and se ured. Inspe t me hani al omponents
periodi ally for damage and orrosion.
Coolant
Never remove the filler ap when the engine is hot – es aping steam or s alding water
ould ause serious personal injury. The oolant level in the expansion tank should be
he ked at least weekly (more frequently in high mileage or arduous onditions). Always
he k the level when the system is cold. Uns rew the filler ap slowly, allowing the
pressure to es ape before removing ompletely. Never run the engine without oolant.
Prevent anti-freeze oming in onta t with the skin or eyes. If this o urs, rinse
immediately with plenty of water. Anti-freeze will damage painted surfa es.
Never top-up with salt water. Even when travelling in territories where the water supply
ontains salt, always ensure you arry a supply of fresh (rain or distilled) water.
California Proposition 65 Warning
Do not operate heater in garages or in other close or unventilate areas.
Diesel exhaust an some of its constituents are known to the State of California to
cause cancer, birth efects, an other repro uctive harm.
Electrical components in this pro uct may contain lea , a chemical known to the
State of California to cause cancer an birth efects an other repro uctive harm.
WARNING
WARNING
WARNING
WARNING
WARNING
WARNING
WARNING
WARNING
WARNING
DANGER
A-2 PROHEAT M-SERIES G-II PCM SERVICE MANUAL

INTRODUCTION
MODEL: M50, M80, M90,
M105, & M125 G-II PCM
This manual is provided to assist in troubleshooting and maintaining the
PROHEAT M-Series heater. They are designed for use on any diesel-equipped
vehi le in luding tru ks, buses (s hool, transit and oa h), onstru tion
equipment, off road equipment, military equipment and argo.
PROHEAT heaters are used for the following appli ations:
(1) Engine Blo k Heat – The PROHEAT will preheat an engine blo k to ensure
reliable starting in old weather. Its’ use throughout the year will redu e
engine wear aused by old starts.
(2) Supplemental Heat (engine running) – The PROHEAT an be used while
the vehi le is operating to provide supplemental heat for the engine
and/or passenger ompartment.
(3) Cargo Heat – The PROHEAT an supply heat to individual ompartments
as a stand-alone heating system, or it an provide supplemental heat to
an existing heating system.
(4) Marine – Marine applications typically involve the engineering an
installation of a complete hot-water heating system of which PROHEAT
is only one component. SeaStar Solutions recommen s that only an
expert in marine hot-water heating systems install a PROHEAT for
marine applications. NOTE: It is the installer’s responsibility to ensure
that an installation complies with all applicable co es an regulations.
B.
Figure B-1.
B-1
PROHEAT M-SERIES G-II PCM SERVICE MANUAL

PROHEAT M-SERIES G-II PCM SERVICE MANUAL
B-2

PROHEAT CONTROL
MODULE (PCM) TYPE
C.
The G-I Proheat Control Module (PCM) is no longer available has been repla ed
with the G-II PCM. The new G-II PCM in orporates a new dual mode analog/digital
temperature sensor and advan ed Data Link software. Both styles an be
identified in the figures below.
THIS MANUAL COVERS ONLY THE G-II PCM.
Please see G-I PCM Service Manual (M50/M80) part number
SL9150. This can be foun by visiting www.proheat.com
Figure C-1. G-I PCM and G-II PCM.
G-I PCM G-II PCM
METRI-PACK
12052644 AUX
CONNECTOR
KEYING
7 PIN
DATA LINK
CONNECTOR
FOUR PIN
DUAL MODE
TEMPERATURE
SENSOR
CONNECTOR
METRI-PACK
12052641 AUX
CONNECTOR
KEYING
2 X TWO PIN
ANALOG
TEMPERATURE
SENSOR
CONNECTORS
6 PIN
DATA LINK
CONNECTOR
NO AIR FILTER
RETENTION
TANGS
AIR FILTER
RETENTION
TANGS
STATUS
INDICATOR
LIGHT
PROHEAT M-SERIES G-II PCM SERVICE MANUAL C-1

C-2 PROHEAT M-SERIES G-II PCM SERVICE MANUAL
DUAL MODE
TEMP SENSOR
STATUS
INDICATOR
LIGHT
DUAL MODE
HAS 4 PIN
CONNECTOR
G-II PCM
DUAL MODE
TEMP
SENSOR
ANALOG TEMP
SENSOR
NO STATUS
INDICATOR
LIGHT
ANALOG SENSOR
HAS 2 PIN
CONNECTOR
G-I PCM
ANALOG
TEMP
SENSOR
Figure C-2. G-II PCM can be identified on a heater by looking for the status indicator light.
Also the Dual Mode Temp Sensor has a 4 pin connector.
Figure C-3. G-I PCM can be identified on a heater by not having the status indicator light.
Also the Analog Temp Sensor has a 2 pin connector.

NOTICE
For ontinuity, all figures shown in this
manual will use a diaphragm ompressor
unless where spe ial instru tions or
illustrations are required .
Figure D-2. Diaphragm Compressor Type.
COMPRESSOR TYPED.
The rotary vane ompressor is no longer available has been repla ed with the
diaphragm type. Both styles an be identified in the Figures below. Please refer
to the M-Series Parts Book at www.proheat. om for part numbers. This manual
overs both styles of ompressors and learly identifies the differen es
where appli able.
Figure D-1. Rotary Vane Compressor Type.
DIAPHRAGM COMPRESSOR
Serial Numbers:
700000 – To Date
Serial Numbers:
500000 – 699999
ROTARY VANE COMPRESSOR
D-1
PROHEAT M-SERIES G-II PCM SERVICE MANUAL

PROHEAT M-SERIES G-II PCM SERVICE MANUAL
D-2

Please refer to the M-Series Parts Book at www.proheat. om for detailed part
des riptions and part numbers . In luded in the parts book are optional features
su h as a timer, oolant pump and asso iated installation equipment and
maintenan e tools. The following information des ribes the general hara teristi s
of M-Series models overed in this manual: Heat Output, G-II PCM CANbus,
Voltage, Fuel Fitting optional onfigurations, and Air Intake optional onfigurations.
The M Series is available in:
Heat Output
CANbus SAE J1939.
The M-Series G-II Proheat Control Module (G-II PCM) is available with CANbus
SAE J1939.
G-II PCM
12 V or 24 V.
The M-Series is available in either a 12 V (10 – 15 VDC) or 24 V (20 – 30
VDC) model.
Voltage
Figure E-1.
MODEL: M80-24V
S/N : X X XXXX
POWER: 95 WATTS
FUEL TYPE: DIESEL
MAX PRESS: 2 BAR
OPER. VOLT: 20-30 VDC
HEAT OUTPUT: 24.0 KW
INSTALLATION DATE:
07 08 09 10 11 12
Made by SeaStar Solutions
Richmond BC Canada
PID 200101
MODEL DESCRIPTIONSE.
50,000 BTU/H (15 kW/H)
80,000 BTU/H (23 kW/H)
90,000 BTU/H (26 kW/H)
105,000 BTU/H (31 kW/H)
125,000 BTU/H (37 kW/H)
PROHEAT M-SERIES G-II PCM SERVICE MANUAL E-1

PROHEAT M-SERIES G-II PCM SERVICE MANUAL
E-2
Splash Guar , Straight an Right Angle Snorkel Attachments.
The M-Series an be equipped with a splash guard, straight and right angle
intake snorkels. Refer to parts book at www.proheat. om
Air Intake – Optional
Configurations
NOTICE
For ontinuity, all figures shown in this
manual will use a splash guard intake.
SPLASH GUARD STRAIGHT 3" OD
STRAIGHT SNORKEL
2.25" (55 mm) OD
SNORKEL ELBOW
26° SNORKEL ELBOW
Figure E-3. Air Intake Options.
Figure E-2.
-4 JIC, NPT 1/8” an -4 Hose Barb.
There are fuel fitting options in luding JIC, NPT, hose barb and tight a ess.
Refer to parts book at www.proheat. om.
Fuel Fitting – Optional
Configurations

M50 12V M50 24V M80 12V M80 24V M90 24V M105 24V M125 24V
RATING BTU/hr (kW) 50,000 50,000 80,000 80,000 90,000 105,000 125,000
(15) (15) (23) (23) (26) (31) (37)
SYSTEM VOLTAGE 12 24 12 24 24 24 24
Nominal DC Voltage (Range) (10–15) (20–30) (10–15) (20–30) (20–30) (20–30) (20–30)
CURRENT DRAW (MAX) Amps 9.5 5.2 8.5 5.2 5.2 9.5 9.5
FUEL CONSUMPTION US gal/hr (L/hr) 0.48 0.48 0.78 0.78 0.82 1.05 1.10
(1.8) (1.8) (2.95) (2.95) (3.10) (3.97) (4.16)
IGNITION TYPE Ele troni Spark Ignition
COOLANT OUTPUT TEMPERATURE MAX. 185°F (85°C)
AMBIENT OPERATING TEMPERATURE -40°F to +122°F (-40°C to +50°C)
WEIGHT lbs (kg) 53 (24) 57.5 (26.1) 60 (27.2)
HEAT EXCHANGER CAPACITY US gal (l) 0.5 (2) 0.6 (2.3) 0.7 (2.6)
COOLANT SYSTEM
Minimum Capacity/Recommen e Flow
Rate Through Heater US gpm (lpm) 7.5 (28) 7.5 (28) 12 (45) 12 (45) 13.2 (50) 15.8 (60) 18 (68)
Maximum Coolant Pressure PSI (bar) 29 (2) 29 (2) 29 (2) 29 (2) 29 (2) 29 (2) 29 (2)
SYSTEM INPUTS
SWITCH Same as Power Supply Voltage
Standard Run Mode
Preheat Run Mode
Supplemental Run Mode
COOLANT PUMP Same as Power Supply Voltage
AUXILIARY Allows independent operation of Coolant Pump through
the G-II Proheat Control Module
POWER 12 Volt or 24 Volt
PROHEAT M-SERIES G-II PCM SERVICE MANUAL 1-1
TECHNICAL
SPECIFICATIONS
1.
SYSTEM OUTPUTS
AUXILIARY OUTPUT Same as Power Supply Voltage
Maximum 1 Amp draw (over-load shut-off prote tion)
High-side swit hed
SWITCH/TIMER Same as Power Supply Voltage
POWER Maximum 1 Amp draw (over-load shut-off prote tion)
High-side swit hed
COOLANT PUMP Same as Power Supply Voltage
Maximum 10 Amp draw (over-load shut-off prote tion)
High-side swit hed
INDICATOR LIGHT Same as Power Supply Voltage
Maximum 1 Amp draw (over-load shut-off prote tion)
High-side swit hed
DANGER
Do not use gasoline.
FUEL TYPES
COMPATIBLE Diesel (ULSD, #1, #2, Ar ti ), JP8, Jet A1
Bio Fuels - Conta t Proheat www.proheat. om

EXHAUST
(SEE NOTE 2 AND 4)
-4 JIC MALE FUEL INLET (INTERNAL
FUEL FILTER) (SEE NOTE 5)
2.75 (70)
12.60 (320)
23.24 (590)
4.45
(113)
8.14 (207)
2.03 (52)
FRONT VIEW
6 x .41 (10)
BOTTOM VIEW
AIR INTAKE
ALTERNATE
SNORKELS
AVAILABLE
(SEE PAGE 1-3 )
3.23 (82)
3.98
(101)
SIDE VIEW
SERVICE SPACE REQUIREMENT
(MAY VARY SEE NOTE 3 & PAGE 1-3)
G-II
PCM
5.39
(137)
8.58
(218)
7.63
(194)
REAR VIEW
4.33
(110)
5.90
(150)
4 x M8 x 1.25 MOUNTING PEM NUTS
HEAT EXCHANGER
(SEE NOTE 6)
.75 (19)
10.13 (257)
9.00 (229)
5.77
(147)
DUAL MODE TEMPERATURE
SENSOR
9.55 (243)
TOP VIEW
COOLANT INLET
COOLANT OUTLET
2 x 1.50 (38)
1.97 (50)
1. DIMENSIONS ARE IN INCHES MILLIMETERS IN BRACKETS).
2. TYPICAL EXHAUST CUTOUT 3.25" CENTERED ON EXHAUST.
3. SERVICE SPACE REQUIRED TO REMOVE BURNER HEAD AND
COMBUSTION TUBE FOR PERIODIC INSPECTION AND CLEANING.
4. THE EXHAUST PIPE SHOULD HAVE A MINIMUM DIAMETER OF
2.75", A MAXIMUM LENGTH OF 5' AND HAVE NO MORE THAN
180° OF BENDS.
5. ALTERNATE FUEL INLET CONFIGURATIONS AVAILABLE, SEE
PARTS BOOK FOR FURTHER INFORMATION.
6. ALTERNATE HEAT EXCHANGERS AVAILABLE, SEE PARTS BOOK
FOR FURTHER INFORMATION.
7. SNORKEL HOSE REQUIRED FOR THIS AIR INTAKE OPTION.
CONTACT TECH SUPPORT AT WWW.PROHEAT.COM FOR
LENGTH AND BEND RESTRICTIONS.
NOTES:
PHYSICAL – M50/M801.1
1-2 PROHEAT M-SERIES G-II PCM SERVICE MANUAL

PROHEAT M-SERIES G-II PCM SERVICE MANUAL 1-3
AIR INTAKE OPTION:
3" OD SNORKEL SEE NOTE 7
AIR INTAKE OPTION:
2.25" OD ELBOW WITH 26° ADAPTER PLATE
SEE NOTE 7
CAN BE INSTALLED AT: 26°, 116°, 206°, 296°
AIR INTAKE OPTION:
2.25" OD SNORKEL SEE NOTE 7
AIR INTAKE OPTION: 2.25" OD ELBOW SEE NOTE 7
CAN BE INSTALLED AT 0°, 90°, 180°, 270°
24.31 (617)
4.71
(120)
SERVICE
SPACE
REQUIREMENT
(SEE NOTE 3)
9.21 (234)
29.09 (637)
3.93
(100)
SERVICE
SPACE
REQUIREMENT
(SEE NOTE 3)
9.99 (254)
24.00 (610)
5.20
(132)
SERVICE
SPACE
REQUIREMENT
(SEE NOTE 3)
8.90 (226)
24.80 (630)
4.22
(107)
SERVICE
SPACE
REQUIREMENT
(SEE NOTE 3)
9.70 (246)
90°
0°
270°
180°
116°
26°
296°
206°
1. DIMENSIONS ARE IN INCHES MILLIMETERS IN BRACKETS).
2. TYPICAL EXHAUST CUTOUT 3.25" CENTERED ON EXHAUST.
3. SERVICE SPACE REQUIRED TO REMOVE BURNER HEAD AND
COMBUSTION TUBE FOR PERIODIC INSPECTION AND CLEANING.
4. THE EXHAUST PIPE SHOULD HAVE A MINIMUM DIAMETER OF
2.75", A MAXIMUM LENGTH OF 5' AND HAVE NO MORE THAN
180° OF BENDS.
5. ALTERNATE FUEL INLET CONFIGURATIONS AVAILABLE, SEE
PARTS BOOK FOR FURTHER INFORMATION.
6. ALTERNATE HEAT EXCHANGERS AVAILABLE, SEE PARTS BOOK
FOR FURTHER INFORMATION.
7. SNORKEL HOSE REQUIRED FOR THIS AIR INTAKE OPTION.
CONTACT TECH SUPPORT AT WWW.PROHEAT.COM FOR
LENGTH AND BEND RESTRICTIONS.
NOTES:

EXHAUST
(SEE NOTE 2 AND 4)
-4 JIC MALE FUEL INLET (INTERNAL
FUEL FILTER) (SEE NOTE 5)
2.75 (70)
12.60 (320)
25.74 (654)
5.37
(136)
8.14 (207)
2.03 (52)
FRONT VIEW
2 x .394 (10)
BOTTOM VIEW
AIR INTAKE
ALTERNATE
SNORKELS
AVAILABLE
(SEE PAGE 1-3 )
3.22 (82)
5.00 (27)
3.98
(101)
SIDE VIEW
SERVICE SPACE REQUIREMENT
(MAY VARY SEE NOTE 3 & PAGE 1-3)
G-II
PCM
5.39
(137)
9.5
(241)
8.55
(217)
REAR VIEW
4.33
(110)
4.33
(110)
5.91
(150)
.394
(10)
3 x M8 x 1.25
HEAT EXCHANGER
(SEE NOTE 6)
10.13 (257)
9.00 (229)
8.25
(210)
DUAL MODE TEMPERATURE
SENSOR
12.05 (306)
TOP VIEW
COOLANT INLET
COOLANT OUTLET
2 x 1.50 (38)
1.97 (50)
1. DIMENSIONS ARE IN INCHES MILLIMETERS IN BRACKETS).
2. TYPICAL EXHAUST CUTOUT 3.25" CENTERED ON EXHAUST.
3. SERVICE SPACE REQUIRED TO REMOVE BURNER HEAD AND
COMBUSTION TUBE FOR PERIODIC INSPECTION AND CLEANING.
4. THE EXHAUST PIPE SHOULD HAVE A MINIMUM DIAMETER OF
2.75", A MAXIMUM LENGTH OF 5' AND HAVE NO MORE THAN
180° OF BENDS.
5. ALTERNATE FUEL INLET CONFIGURATIONS AVAILABLE, SEE
PARTS BOOK FOR FURTHER INFORMATION.
6. ALTERNATE HEAT EXCHANGERS AVAILABLE, SEE PARTS BOOK
FOR FURTHER INFORMATION.
7. SNORKEL HOSE REQUIRED FOR THIS AIR INTAKE OPTION.
CONTACT TECH SUPPORT AT WWW.PROHEAT.COM FOR
LENGTH AND BEND RESTRICTIONS.
NOTES:
PHYSICAL – M90/105
1-4 PROHEAT M-SERIES G-II PCM SERVICE MANUAL

AIR INTAKE OPTION:
3" OD SNORKEL SEE NOTE 7
AIR INTAKE OPTION:
2.25" OD ELBOW WITH 26° ADAPTER PLATE
SEE NOTE 7
CAN BE INSTALLED AT: 26°, 116°, 206°, 296°
AIR INTAKE OPTION:
2.25" OD SNORKEL SEE NOTE 7
AIR INTAKE OPTION: 2.25" OD ELBOW
SEE NOTE 7
CAN BE INSTALLED AT 0°, 90°, 180°, 270°
26.81 (681)
7.21
(183)
SERVICE
SPACE
REQUIREMENT
(SEE NOTE 3)
9.21 (234)
31.59 (802)
6.43
(163)
SERVICE
SPACE
REQUIREMENT
(SEE NOTE 3)
9.99 (254)
26.50 (673)
7.70
(196)
SERVICE
SPACE
REQUIREMENT
(SEE NOTE 3)
8.90 (226)
27.30 (693)
6.72
(171)
SERVICE
SPACE
REQUIREMENT
(SEE NOTE 3)
9.70 (246)
90°
0°
270°
180°
116°
26°
296°
206°
1. DIMENSIONS ARE IN INCHES MILLIMETERS IN BRACKETS).
2. TYPICAL EXHAUST CUTOUT 3.25" CENTERED ON EXHAUST.
3. SERVICE SPACE REQUIRED TO REMOVE BURNER HEAD AND
COMBUSTION TUBE FOR PERIODIC INSPECTION AND CLEANING.
4. THE EXHAUST PIPE SHOULD HAVE A MINIMUM DIAMETER OF
2.75", A MAXIMUM LENGTH OF 5' AND HAVE NO MORE THAN
180° OF BENDS.
5. ALTERNATE FUEL INLET CONFIGURATIONS AVAILABLE, SEE
PARTS BOOK FOR FURTHER INFORMATION.
6. ALTERNATE HEAT EXCHANGERS AVAILABLE, SEE PARTS BOOK
FOR FURTHER INFORMATION.
7. SNORKEL HOSE REQUIRED FOR THIS AIR INTAKE OPTION.
CONTACT TECH SUPPORT AT WWW.PROHEAT.COM FOR
LENGTH AND BEND RESTRICTIONS.
NOTES:
1-5
PROHEAT M-SERIES G-II PCM SERVICE MANUAL

EXHAUST
(SEE NOTE 2 AND 4)
-4 JIC MALE FUEL INLET (INTERNAL
FUEL FILTER) (SEE NOTE 5)
2.75 (70)
12.60 (320)
27.24 (692)
4.45
(113)
8.14 (207)
2.03 (52)
FRONT VIEW
6 x .41 (10)
BOTTOM VIEW
AIR INTAKE
ALTERNATE
SNORKELS
AVAILABLE
(SEE PAGE 1-3 )
3.23 (82)
3.98
(101)
SIDE VIEW
SERVICE SPACE REQUIREMENT
(MAY VARY SEE NOTE 3 & PAGE 1-3)
G-II
PCM
5.39
(137)
8.58
(218)
7.63
(194)
REAR VIEW
4.33
(110)
5.90
(150)
4 x M8 x 1.25 MOUNTING PEM NUTS
HEAT EXCHANGER
(SEE NOTE 6)
.75 (19)
10.13 (257)
9.00 (229)
9.78
(248)
DUAL MODE TEMPERATURE
SENSOR
13.55 (344)
TOP VIEW
COOLANT INLET
COOLANT OUTLET
2 x 1.50 (38)
1.97 (50)
1. DIMENSIONS ARE IN INCHES MILLIMETERS IN BRACKETS).
2. TYPICAL EXHAUST CUTOUT 3.25" CENTERED ON EXHAUST.
3. SERVICE SPACE REQUIRED TO REMOVE BURNER HEAD AND
COMBUSTION TUBE FOR PERIODIC INSPECTION AND CLEANING.
4. THE EXHAUST PIPE SHOULD HAVE A MINIMUM DIAMETER OF
2.75", A MAXIMUM LENGTH OF 5' AND HAVE NO MORE THAN
180° OF BENDS.
5. ALTERNATE FUEL INLET CONFIGURATIONS AVAILABLE, SEE
PARTS BOOK FOR FURTHER INFORMATION.
6. ALTERNATE HEAT EXCHANGERS AVAILABLE, SEE PARTS BOOK
FOR FURTHER INFORMATION.
7. SNORKEL HOSE REQUIRED FOR THIS AIR INTAKE OPTION.
CONTACT TECH SUPPORT AT WWW.PROHEAT.COM FOR
LENGTH AND BEND RESTRICTIONS.
NOTES:
PHYSICAL – M125
1-6 PROHEAT M-SERIES G-II PCM SERVICE MANUAL

AIR INTAKE OPTION:
3" OD SNORKEL SEE NOTE 7
AIR INTAKE OPTION: 2.25" OD ELBOW
WITH 26° ADAPTER PLATE
SEE NOTE 7
CAN BE INSTALLED AT:
26°, 116°, 206°, 296°
AIR INTAKE OPTION:
2.25" OD SNORKEL SEE NOTE 7
AIR INTAKE OPTION: 2.25" OD
ELBOW SEE NOTE 7
CAN BE INSTALLED AT:
0°, 90°, 180°, 270°
28.31 (719)
8.71
(221)
SERVICE
SPACE
REQUIREMENT
(SEE NOTE 3)
9.21 (234)
33.09 (840)
7.93
(201
SERVICE
SPACE
REQUIREMENT
(SEE NOTE 3)
9.99 (254)
28.00 (711)
9.02
(22.9)
SERVICE
SPACE
REQUIREMENT
(SEE NOTE 3)
8.90 (226)
28.80 (732)
8.22
(209)
SERVICE
SPACE
REQUIREMENT
(SEE NOTE 3)
9.70 (246)
90°
0°
270°
180°
116°
26°
296°
206°
1. DIMENSIONS ARE IN INCHES MILLIMETERS IN BRACKETS).
2. TYPICAL EXHAUST CUTOUT 3.25" CENTERED ON EXHAUST.
3. SERVICE SPACE REQUIRED TO REMOVE BURNER HEAD AND
COMBUSTION TUBE FOR PERIODIC INSPECTION AND CLEANING.
4. THE EXHAUST PIPE SHOULD HAVE A MINIMUM DIAMETER OF
2.75", A MAXIMUM LENGTH OF 5' AND HAVE NO MORE THAN
180° OF BENDS.
5. ALTERNATE FUEL INLET CONFIGURATIONS AVAILABLE, SEE
PARTS BOOK FOR FURTHER INFORMATION.
6. ALTERNATE HEAT EXCHANGERS AVAILABLE, SEE PARTS BOOK
FOR FURTHER INFORMATION.
7. SNORKEL HOSE REQUIRED FOR THIS AIR INTAKE OPTION.
CONTACT TECH SUPPORT AT WWW.PROHEAT.COM FOR
LENGTH AND BEND RESTRICTIONS.
NOTES:
1-7
PROHEAT M-SERIES G-II PCM SERVICE MANUAL