EverHot IGE-199R-10N, IGE-199R-10X, IGE-199C-5N, IGE-199C-5X Service Manual

Tankless Gas Water Heater

SERVICE

MANUAL

Troubleshooting Guide

and Instruction for Service

(To be performed ONLY by qualified service providers)

Document 11014

For the LAARS®Heating System

®

EverHot

Gas Water Heater Models:

IGE-199R-10(N,X) IGE-199C-5(N,X)

Save this manual for future reference

Exterior Tankless

Key to Warning Symbols

Failure to comply with the following instructions may results in serious personal injury or
damage to the appliance.

Be careful of possible electric shock. Wiring inside this appliance may potentially be at
120 volts.

Disconnect power supply to unit when carrying out the following service repairs.

Read Fault Diagnosis and Wiring Diagram carefully to avoid incorrect wiring.

Do not disassemble. Parts within can not be exchanged or diagnosed faulty.

Please follow t

he instructions in the following chapters

to ensure safe and appropriate service.

ter completing the service and confirming that there are no water or

Af
gas leaks or incorrect wiring, test operation of the appliance.

2

TABLE OF CONTENTS

Section Description Page

- - - Glossary of Terms and Symbols..................................................... 4

I ......................General Information........................................................................ 5

a. How to Use This Manual. ................................................ 6

b. Cut Away illustration. ...................................................... 7

c. Schematic illustration...................................................... 8

II .....................Specifications. (General) ................................................................. 9

a. Combustion Specifications.............................................. 11

b. Default Dip Switch Settings............................................. 12

III ....................Main Components. ......................................................................... 13

IV ....................Safety Device Function. .................................................................. 15

V .....................Sequence of Operation................................................................... 17

a. Operation Sequence Flow Chart. .................................... 19

b. Sequence Timing Chart. .................................................. 21

VI ....................Troubleshooting (error messages).................................................. 23

a. Quick Reference Diagnostic Points. ................................ 25

b. Wiring Diagram ................................................................ 27

c. Troubleshooting Flow Chart. ........................................... 29

d. Trouble Shooting Procedure. .......................................... 34

VII ...................Gas Pressure Setting Procedure. ................................................... 44

VIII ..................Service Procedures. ........................................................................ 46

IX ....................Flushing Procedure for Lime Scale Removal .................................. 52

X .....................Parts Breakdown ............................................................................ 53

Refer t

o installation and oper

• General Dimensions.

• Piping Recommendations.

• Remote Control Features.

• Water Flow Rates vs Temperature.

ation manual for the following reference information:

3

GLOSSARY OF TERMS AND SYMBOLS

This glossary of terms and symbols is provided to assist you in understanding some of the
language used throughout this manual.

dB(A) - sound pressure level in decibels, "A" range
DC - direct current
AC - alternating current
WFCD - water flow control device
FB - feedback information
Hz - hertz
IC - integrated circuit
BTU/H - British thermal units per hour
PSI - Pounds per square inch
LED - light emitting diode
GPM - gallons per minute
mA - milliamps
W.C. - inches of water column
mm - millimeters
NOx - oxides of nitrogen NO & NO

OHS - overheat switch
PCB - printed circuit board
CPU - central processing unit
POT - potentiometer
rpm - revolutions per minute
SV - solenoid valve

Ø - diameter

∆°F - delta T or temperature rise above ambient
POV - modulating valve
TE - thermal efficiency
TH - thermistor
T

IN

T

out

- temperature of incoming water

- temperature of outgoing water

2

4

I - GENERAL INFORMATION

This tankless water heater is a high output, high efficiency appliance, which heats the water
continuously as hot water is being drawn for use. Unlike tank type storage water heaters, this water
heater does not store hot water. The burner operates whenever there is a demand for hot water and
is off when the water flow stops. Hot water is continuously supplied for any length of time required,
as long as the specified flow rates are not exceeded. There is no need to set the temperature higher
than required for sufficient capacity. The water heater has sufficient capacity to supply several hot
water faucets simultaneously. The hot water flow capability will be dependent upon the temperature
of the outlet water selected. Operational features of this water heater include:

• This water heaters is designed to be installed outdoors on an outside wall using the
supplied wall bracket. No indoor space is needed and the water heater can be
mounted at a height convenient for servicing.

• The burners ignite by direct spark ignition within 3 seconds of detecting minimum
operational water flow. There is no standing pilot.

• A variable speed combustion air blower forces the combustion air supply into the
burner compartment.

• No venting system required. For outdoor installation only.

• An optional recess box is available which allows the water heater to be recessed into
an outside wall and conceal the piping behind a cover for a more attractive installation.

1

The box enclosure dimensions are: 40

⁄2" H x 14 3⁄4" W x 9 1⁄2" D. Contact your supplier

to order this optional accessory.

• The burner flame is continuously monitored and modulated to match the heating
requirements of the water flow. Temperature and flow sensors continually monitor the
water flow and outlet water temperature and adjust the burner and combustion air
blower to maintain temperature.

• The included, r

emote mount Main Control may be conveniently located near the point
of use and is adjustable from 96-160°F for residential models or 96-180°F for
commercial models. In addition to the Main Control, up to two optional bathroom
controls are available on the residential models f

or setting the temperature in the

bathroom fixtures up to 120°F.

• The Remote Main Control also displa

ys fault codes if the water heater malfunctions to

assist with servicing the water heater.

• The heat exchanger coil is provided with anti-freeze heaters for cold climate conditions
for protection as low as -30°F (-34°C). Drain solenoids should be installed to drain the
water heater in the event of a power failure. (See installation instructions)

Tools Required for Troubleshooting

Multifunction Digital Test Meter
Long reach (12") Magnetic Phillips screw driver (#2 Tip).
3/16 Allen wrench.
Small (pocket size) blade screw driver.
Monometer or Magnehelic inches water column gage.

with needle point test leads.

5

I - GENERAL INFORMATION (cont.)

HOW TO USE THIS MANUAL

It is intended for this manual to be used by qualified service personnel for the primary purpose of
troubleshooting analysis and repair of this tankless gas fired water heater. Understanding the basic
operation of the "Main Components" and the "Sequence of Operation" sections of this manual will
contribute greatly to your success in the troubleshooting analysis of this product.

Sections of this manual reference general information and specifications. The primary focus is trouble
shooting analysis and repair. The trouble shooting section consists of the following:

Error Message Table

•

Table showing Error Message as displayed on remote control indicating likely fault and
remedy.

•

Quick Reference Diagnostics Points Table

This guide will identify the specific diagnostic point for each component as well as the
correct electrical value for each component.

• Troubleshooting Flow Chart

The "Trouble Shooting Flow Chart" identifies fault potentials and directs service to the
appropriate diagnostic check points. The check points are identified in the
troubleshooting procedure and are shown on the wiring diagram by means of an
encircled letter with a subscript number.

Example:

This chart will also refer to a page number to reference a pictorial version of the
component analysis as outlined in the "Trouble Shooting Procedure" section of this manual.

Trouble Shooting Pr

•

ocedure

Pictorial procedure including diagnostic points, electrical values and referral to
"Service Procedure" for replacement of faulty components.

Quick Reference Diagnostics Points Table

•

Quick reference guide for all diagnostic points.

Service Procedure

•

Pictorial procedure for removal and replacement of components.

6

I - GENERAL INFORMATION (cont.)

CUT-AWAY ILLUSTRATION

7

I - GENERAL INFORMATION (cont.)

SCHEMATIC ILLUSTRATION

8

II - SPECIFICATIONS – GENERAL

Type of appliance Temperature controlled continuous flow gas hot water system
Operation With/without remote controls
Exhaust system Direct Vent - Forced combustion

Model Type Residential Commercial

Maximum/Minimum
gas rate (Input Btu's)

Thermal Efficiency Natural Gas 84% Propane Gas 85%
Energy Factor (EF) Natural Gas 0.82 Propane Gas 0.84
Capacity (Gallons 1st Natural Gas 218 Propane Gas 227

Hour @ 90°F rise)
NOx Emissions (at 3% 02) Less than 40 ppm
Hot water capacity (50°F rise) 0.5 to 6.5 GPM's
Setpoint Temperature Factory setting - 120°F

(without remote)

Temperature range
with remote keypads connected BSC-45-4US 96 - 120°F

Approved gas type Natural or Propane – Ensure unit matches gas supply type.
Installation Outdoor installation ONLY
Dimensions Height 235⁄8"

Weight 46 Lbs.
Noise levels 49 dB's
Connections Gas supply 3⁄4" MNPT

Ignition system Direct electronic ignition
Electrical consumption Operating 63 watts

199,000 Btu's – 15,000 Btu's Natural gas
199,000 Btu's – 15,000 Btu's Propane Gas

BC-45-4US 96 - 120°F MCC-45-4US 96 - 160°F

MC-45-4US 96 - 180°F

3

Width 13

⁄4"

Depth 87⁄8"

3

Cold water inlet
Hot wat

er outlet

⁄4" MNPT

3

⁄4" MNPT

Water temperature control Simulation feedforward and feedback
Water flow control Water flow sensor and automatic electro-mechanical water

Recommended Minimum water
supply pressure 20 PSI (recommend 50-80 PSI for maximum performance)

Maximum water supply pressure 150 PSI

Standby 5.5 watts
Anti-frost protection 84 watts

control device

9

II - SPECIFICATIONS – GENERAL (cont.)

Power Supply Appliance – 120 Volts A.C. – 60 Hz.

Remote control 12 volt D.C. (Digital)

Safety Devices Flame failure - Flame rod

Boiling protection - 203˚F
Remaining flame (OHS) 194˚F bi-metal switch
Fusible link
Automatic frost protection

- Bimetal sensor & anti-frost heaters
Combustion fan rpm check - integrated circuit

Over current - Glass fuse (3 amp)
Remote control cable Non-polarized two core cable
Clearances from combustibles Top of heater 12"

Front of heater 24"

Sides of heater 6"

Back of heater 0"

Ground 12"

Installations within RGB-25 Recess Box: Clearances

from combustibles to recess box top, bott

sides = 0"
Clearances from eaves, Top of heater 36"
porches, overhangs

om, back and

10

II - SPECIFICATIONS (cont.)

COMBUSTION SPECIFICATIONS

Item Gas Type Natural Propane
Gas Consumption Minimum Btu's 15,000 15,000

Injector Diameter Upper ø.045 (1.15mm) ø.029 (.75mm)
Inches (mm) Lower ø.070 (1.8mm) ø.045 (1.15mm)
Main Burner B3A7-1 (Lean and Rich Bunsen Burner)
Main Damper H73-115 (Upper: ø6, Lower: Not Used)
Gas Pressure
Supply/Manifold Minimum Supply 6" W.C. 10" W.C.

Maximum Btu's 199,000 199,000

Maximum Supply 10.5" W.C. 13.5" W.C.
Low Fire Manifold 0.56" W.C. 0.88" W.C.
High Fire Manifold 3.4" W.C. 5.1" W.C.

11

II - SPECIFICATIONS (cont.)

DIP SWITCH SETTINGS

Do not attempt to adjust dip switch settings from there factory default settings.

Doing so will result in damage to unit, property damage, personal injury or death.

Contact Technical Support for information pertaining to dip switch function.

FACTORY DEFAULT SETTING, RESIDENTIAL UNITS

Natural Gas Model Propane Gas Models
Dip Switch Settings: Dip Switch Settings:
(SW1) (SW2) (SW1) (SW2)
#1 = Off #1 = On #1 = Off #1 = Off
#2 = On #2 = Off #2 = On #2 = Off
#3 = Off #3 = Off #3 = Off #3 = Off
#4 = Off #4 = Off #4 = Off #4 = Off
#5 = Off #5 = Off
#6 = Off #6 = Off
#7 = Off #7 = Of
#8 = Off #8 = Off

DANGER

f

FACTORY DEFAULT SETTING, COMMERCIAL UNITS

Natural Gas Models Propane Gas Models
Dip Switch Settings: Dip Switch Settings:
(SW1) (SW2) (SW1) (SW2)
#1 = Off #1 = On #1 = Off #1 = Off
#2 = On #2 = Off #2 = On #2 = Off
#3 = Off #3 = Off #3 = Off #3 = Off
#4 = Off #4 = On #4 = Off #4 = On
#5 = Off #5 = Off
#6 = Of
#7 = Off #7 = Off
#8 = Off #8 = Off

f #6 = Off

12

III - MAIN COMPONENTS

1. Mechanical Water Regulator

The unique water regulator mechanism ensures the hot water is maintained with no noticeable
change to the desired temperature during use, even if water pressure drops due to another tap being
turned on and increasing the demand.

2. Preset Bypass

A preset volume of cold water is mixed with water heated in the heat exchanger.

3. Burner

The burner assembly is made up of 16 identical stainless steel
Bunsen burners, secured by an aluminized steel framework.
An aluminum manifold with 32 integral injectors supplies gas
to the burners, and is attached to the front lower cover of the
burner box and gas control assembly.

4. Gas Control Valve

The gas control valve uses four solenoids to fully modulate within four different input ranges to
respond quickly and accurately to changes in water flow rate. The four ranges are as follows: up to
18% of total btu's (using three burners), up to 33% (using five burners), up to 50% (using eight
burners, and up to 100% (using sixteen burners) This increases the flexibility of the regulator/
modulating valve by supplying gas equally to each burners.

13

III - MAIN COMPONENTS (cont.)

5. Combustion Fan

Air for the combustion is supplied by a centrifugal fan
driven by a DC motor. After a pre-purge period of 0.2
seconds, the fan speed is controlled by the PCB to
provide the correct volume of air for combustion. The
calculation for the fan speed is based upon incoming
water temperature, water flow and the temperature
selected on the remote controls.

The actual speed of the motor is continuously monitored
by a magnetic pulse sensor.

This sensor emits (4) pulses per rotation of the fan. This is
the fan feedback or confirmation data processed by the PCB.

The fan speed is constantly correcting to provide optimum combustion conditions. In addition,
the fan speed will determine the opening degree of the modulating gas valve. This enables the
gas rate to always match the volume of air for combustion, as well as the input required to
heat the water.

1. Water Flow Sensor and Water Flow Control device

Water flow is detected by a turbine/magnetic pulse generating device. Water flows through the
turbine/magnetic sensor providing information to the PCB by generating a pre-determined number of
pulses in proportion to the water flow. These pulses are counted by the PCB – no pulse indicates no
water flow. The frequency of the magnetic pulses increases as the water flow increases, this enables
the PCB to calculate the exact water flow, and determine the water flow in gallons per minute. As
soon as the required water flow is detected, the PCB activates the combustion fan. The combustion
fan speed is monitored by a magnetic pulse sensor. The output from this sensor is processed by the
PCB which opens the gas modulating valve to a degree proportional to the fan speed.
See above for further details on the combustion fan.

The water flow control consists of a plug and barrel valve which is rotated by a motor to increase or
decrease the volume of water passing through the heat exchanger.

Automatic water flow control device

14

IV - SAFETY DEVICE FUNCTION

Flame Failure

Situated to the right of the burner in the front of the combustion chamber, the flame rod monitors the
combustion process. This sensor monitors the flame intensity, while the PCB compares this signal to
the feed back signal from the combustion fan motor, water flow control, and gas flow through the POV
valve. If any one of the feedback signals are incorrect, the unit will shut off, preventing discharge of
gas to the burner.

Over Heat Protection Device

Also referred to as an Over Heat Switch. This device is fitted to a bend section at the left side of the
heat exchanger. If the flame remains on to the burner after the tap is closed and the water
temperature inside the heat exchanger reaches 194° F, a 12 volt DC bi-metal cut-off switch will shut
off the gas supply to the solenoids.

No Water

Should the incoming water flow become restricted or stop, the water flow sensor will cease to send a
magnetic pulse signal to the PCB, in turn preventing gas to flow into the combustion chamber. If you
have restricted flow, first check to ensure the inline water filter is not clogged.

Thermal Fuse (Non-Resettable)

Wrapped around the entire surface of the heat exchanger you will find a thermal fuse. This device
activates in the event of excessive heat exchanger temperature or the temperature outside the heat
exchanger reaches 264 °F. If the thermal fuse melts, it breaks an electronic circuit which in turn shuts
off the power supply to the gas solenoids, deactivating the unit.

Combustion Fan Revolution Check

The combustion fan rpm's are continually monitored by a magnetic pulse generator connected to the
PCB. If the fan revolutions deviate from the speed required for complete combustion, a signal is sent
to the PCB and the revolutions adjust accordingly. (If not the unit deactivates)

Automatic Frost Protection

When the temperature inside the appliance drops below 37°F , the frost sensing device inside the
appliance activates the anti-frost heaters to prevent the water inside the unit from freezing. The
antifrost heaters remain ON until the temperature inside the appliance rises to 57°F. There are five
(16) watt anti-frost heaters located at various points throughout the main water flow area of the
appliance. The unit also incorporates the ability to fire for (3) seconds in the event the anti-frost
heaters can not keep the water temperature from dropping below 37°F. This unique feature will heat
the water in the lines inside the appliance back up to 57°F.

Both of the above features function as

long as the unit has power and gas. There is an optional freeze protection system that can be

added to the unit's piping. See the auto drain down drawing in the product Owner's manual for
instructions on how to install the option freeze protection in the event of a power failure in cold
climates.

15

IV - SAFETY DEVICE FUNCTION (cont.)

Over temperature Cut-Off

The temperature of the outgoing hot water is constantly monitored by the water temperature
thermistor located near the outlet of the appliance. If the outgoing water temperature reaches 5 °F
above the preset temperature, the burner will automatically deactivate. The burner will ignite again
when the outgoing hot water temperature falls below the preset temperature.

16

V - SEQUENCE OF OPERATION

The preset temperature is selected at one of the remotes controls (where fitted). Where no remote
control is fitted , the default temperature can be set at 108, 120, 130, 140, 150, 160, 170, or 180 °F.
To select one of the above temperatures as your default setting, you
and training. (Contact your technical service group)

When the unit is first plugged into 120 volts, the PCB assumes an incoming water temperature of
77°F. This prevents the appliance from starting in "High fire" and producing very hot water the first
time it is used.

The data used to determine the outgoing water temperature, initially, is incoming water flow and the
remote control pre-set temperature.

From the incoming water flow and remote control pre-set temperature data, the CPU is able to
determine a suitable gas rate to initiate the appliance operation once a hot water tap opens.

The calculation of temperature rise and water flow is called simulation feed-forward.

The water heater calculates incoming water temperature by subtracting the theoretical temperature
rise from the outgoing hot water temperature to establish the correct gas flow.

MUST obtain written permission

When a hot water tap is opened, water begins to flow through the water heater. The turbine in the
water flow sensor begins to revolve. The revolution speed is proportional to the water flow. A sensor
located inside the device relays information in the form of magnetic pulses to the main PCB to
determine whether or not water is flowing, and also, the volume of water flowing. When a
predetermined water flow is sensed, the ignition sequence begins.

The combustion fan pre-purges the combustion chamber. A rev counter on the combustion fan
indicates the fan rpm to the main PCB. When the pre-purge cycle is completed, the PCB controls the
fan rpm by varying the DC voltage to the fan motor. This maintains the correct air/gas ratio
throughout the time the water heater is in use and ensures proper combustion.

The gas is ignited by direct spark and the flame is sensed by the flame rod. The opening degree of
the modulating valve is determined by the combustion fan speed.

The changeover valve directs gas to one side or both sides of the burner. At the point where the
changeover valve opens or closes the modulating valve is instantly re-adjusted by the PCB to
compensate for the change in the number of burners in use. From the information provided by the
water flow sensor and the water temperature thermistor, the PCB determines how much gas is
required to heat the water to the temperature selected on the remote control.

The PCB is programmed to provide the maximum volume of water possible at a given temperature
rise. As the water flow from the tap is increased, the PCB increases the gas and air flow to the burner.

17

V - SEQUENCE OF OPERATION (cont.)

When the hot water tap is turned off, the water flow sensor stops revolving, and the magnetic pulse
ceases, indicating to the PCB that there is no water flowing, in turn the PCB closes the gas valves. The
combustion fan continues to operate for 65 seconds. This will provide quicker ignition when the tap is
turned on and off in rapid succession, and removes the need for a pre-purge cycle allowing the burner
to re-light immediately when a hot water tap is opened again.

18

V - SEQUENCE OF OPERATION (cont.)

OPERATION SEQUENCE FLOW CHART

19

V - SEQUENCE OF OPERATION (cont.)

OPERATION SEQUENCE FLOW CHART

20

V - SEQUENCE OF OPERATION (cont.)

SEQUENCE TIMING CHART

21

V - SEQUENCE OF OPERATION (cont.)

SEQUENCE TIMING CHART

22

VI - TROUBLESHOOTING

ERROR MESSAGES

Error Faulty Remedy

10 Air Supply or Exhaust Blockage Check intake and exhaust ports for obstructions.

Check that nothing is blocking the flue inlet or exhaust.

Did you maintain the proper clearance from combustibles

around the unit?
11 No Ignition Ensure you have gas to the appliance.

Ensure gas type and pressure is correct.

Bleed all air from gas lines.

Verify dip switches are set properly.

Disconnect all MSA controls.

Ensure gas line, meter, and/or regulator is sized properly.

Ensure appliance is properly grounded.

k gas solenoid valves for open or short circuits.

Chec

Ensure igniter is operational.

Check igniter wiring harness for damage.
12 Flame Failure Ensure you have gas to the appliance.

Ensure gas type and pressure is correct.

Bleed all air from gas lines.

Verify dip switches are set properly.

Ensure flame rod wire is connected.

Check flame rod for carbon build-up.

Ensure gas line, meter, and/or regulator is sized properly.

e appliance is properly g

Ensur

as solenoid valves for open or short circuits.

k g

Chec

k power suppl

Chec

y for loose connections.
Check power supply for proper voltage and voltage drops.
Disconnect all MSA controls.
Disconnect keypad.
Disconnect and re-connect all wiring harnesses on unit and PC
board.
Immediate code 12 usually indicates a defective gas valve

oblem.

or po

er suppl

w

y pr

14 Thermo Fuse Ensure dip switches are set to the proper position.

Ensure high fire and low fire manifold pressure is correct.

as type of unit and ensure it matches gas type

k g

Chec
being used.

k heat exchanger for cracks and/or separations.

Chec
Check resistance on safety circuit.
Check for improper conversion of product.
Check for restrictions in air flow around unit and vent
exhaust discharge.
Check for a low flow circulating system that is causing the
unit to short cycle.

eign materials in combustion chamber

or

or a f

k f

Chec
and/or exhaust piping.

6

1

Over Temperature Warning Check for clogged heat exchanger.

Check for restrictions in air flow around unit and vent terminal.

or a low flow circulating system that is causing the unit

k f

Chec
to short cycle.

or foreign materials in combustion chamber and/or

k f

Chec
exhaust.

rounded.

23

VI - TROUBLESHOOTING (cont.)

ERROR MESSAGES

Error Faulty Remedy

32 Outgoing Water Check sensor wiring for damage.

Temperature Sensor Faulty Check resistance on sensor.

Check and clean scale from sensor.
Replace sensor.

33 Heat Exchanger Outgoing Check sensor wiring for damage.

Temperature Sensor Faulty Check resistance on sensor.

Check and clean scale from sensor.
Replace sensor.

34 Combustion Air Check sensor wiring for damage.

Temperature Sensor Faulty Check resistance on sensor.

Check and clean dirt from sensor.
Ensure fan blade is tight on motor shaft and it is in good
condition. Clean blower blades if dirty.
Check for restrictions in air flow around unit and vent terminal.
Replace sensor.

52

61 Combustion Fan Failure Ensure fan motor will turn freely. Motor will operate with a

71 SV0, SV1, SV2, and SV3 Check wiring harness to all solenoids for damage and/or loose

72 Flame Sensing Device Faulty Check micro amps produced by flame rod.

LC Scale Build-up in Heat Exchanger Turn off power supply, then reapply power; if code does not

No Nothing happens when water flow Clean inlet water supply filter.
Code is activated Ensure you have at least the minimum flow rate required to fire

Modulating Solenoid Valve Check modulating gas solenoid valve wiring harness for loose
Signal Abnormal or damage terminals.

Check resistance on solenoid valve.

small amount of r

k wiring harness t

Chec

estriction.

o mot

or for damaged and/or loose
connections.
Check resistance on motor winding.

Solenoid Valve Circuit Faulty connections.

k resistance on each solenoid.

Chec

Remove f

lame rod and check for carbon build-up, clean with
sand paper.
Ensure flame rod is touching flame when unit fires.
Check inside burner chamber for any foreign material blocking

od.

flame at f
Chec
Replace f

lame r

k all wiring t

lame rod.

lame rod f

o f

or damag

e.

reappear separate control wires from the unit's power supply.
Flush heat exchanger.
Replace heat exchanger.

unit.
Chec

or pipe dope inside w

k f

ater flow control turbine.
On new installations ensure hot and cold water lines are not
crossed.
Check for bleed over. Isolate unit from building by turning off
hot w
If unit f

er line t

at

o building, t

hen open y

ires, there's a bleed over in your plumbing.

our pressure relief valve.

If a circulating system is in use, it must be isolated also.
Remote control does not light up but you have 12 VDC at the
terminals for controls.
Disconnect water flow control motor, then turn on hot water, if
unit fires replace water flow control assembly.
Chec

k resistance on water flow control sensor.

24

VI - TROUBLESHOOTING (cont.)

QUICK REFERENCE DIAGNOSTIC POINTS

IMPORTANT SAFETY NOTES:

There are a number of (live) tests that are required when fault finding this product. Extreme care
should be used at all times to avoid contact with energized components inside the water heater.

Only trained and qualified service agencies should attempt to repair this product.
R

emember, before checking for resistance readings, you should disconnect the power source

(unplug it) to the unit and isolate the item to be checked from the circuit.

(TR) Transformer:

Wire color Voltage Resistance Connector # Pin #'s
Black ~White 100

Blue ~Brown 110

(SV0, SV1, SV2, SV3 and POV) Gas valve and Modulating solenoids: (Set meter above 2K)

(SV0) Pink ~Black 80 ~100 VDC 1,8K ~2K ohms E1 1 ~2
(SV1) Black ~Yellow 80 ~100 VDC 1,8K ~2K ohms E2 2
(SV2) Black ~Blue 80 ~100 VDC 1,8K ~2K ohms E3 2 ~4
(SV3) Black ~Brown 80 ~100 VDC 1,8K ~2K ohms E4 2 ~5
(POV) Pink ~Pink 2 ~15 VDC 67 ~81 ohms C2 3 ~4

120 VAC 51 ~63 ohms F9 1 ~2

~

120 VAC 51 ~63 ohms F7 1 ~3

~

~

3

(M) Water Flow Control Device Servo or Geared Motor:

Red ~Blue 11
Grey ~Brown 4
Grey ~Yellow N/A N/A B2 5
Grey ~Orange 11 ~14 VDC N/A B2 5

NOTE: The grey wire listed above turns to black at B connector on the PCB, the orange wire turns to red.

13 VDC 22 ~26 ohms B2 9 ~10

~

6 VDC N/A B2 5 ~7

~

~
~

8
6

(QS) Water Flow Sensor:

Black
Yellow ~Black 4

Red 11

~

13 VDC 5.5K

~

7 VDC 1 meg ~1.4 meg B4 1 ~5

~

6.2K B4 5

~

~

6

By-pass Flow Control:

Brown ~White2

6 VDC Unit in operating G4 ~G5 4 ~5

~

Orange ~White mode G2 ~G5 2 ~5
Yellow ~White 15 ~35K G1

Red ~White/Ground 3

G5 1 ~5

~

~

5

(IG) Ignition System:

Grey ~Grey 90

100 VAC N/A F8 2 ~3

~

(FM) Combustion Fan Motor:

Red ~Black 6 ~45 VDC N/A A1 1
White ~Black 6
Yellow

Black 11

~

45 VDC 9.2K ~9.4K A1 2

~

13 VDC 3.5K

~

Set your meter to the Hertz scale. Reading across the red and yellow wires at terminals 2 and 3 you
should read between 60 and 350 Hertz.

3.9K A1 2

~

25

~
~
~

2
4
3

VI - TROUBLESHOOTING (cont.)

Thermal Fuse:
Red ~Red 100 VAC Below 1 ohm B ~C B6

Overheat Switch:
Red ~Red 100 VAC Below 1 ohm B ~C B6

Flame Rod:

Place one lead of your meter to the flame rod and the other to earth or ground. With the unit running
you should read between 5 ~ 150 VAC. Set your meter to the µ amp scale, series your meter in line
with the flame rod. You should read 1µ or greater for proper flame circuit. In the event of low flame
circuit remove the flame rod and check for carbon and/or damage.

Heat Exchanger, Air Temperature, and Outgoing Water Temperature Thermistors:

Check all thermistors by inserting meter leads into each end of the thermistor plug. Set your meter to
the 20K scale and read resistance. You should be able to apply heat to the thermistor bulb and see
the resistance decrease. Then apply some ice to the thermistor and the resistance should increase.
See below for examples of temperatures and resistance reading at those temperatures.

~

~

C1

C1

Example: 59°F = 11.4 ~14 K

86°F = 6.4 ~7.8K

113°F = 3.6 ~4.5K
140°F = 2.2 ~2.7K
221°F = 0.6 ~0.8K

Outgoing Water Thermistor:

White ~White N/A See example above B B3 ~B4

Heat Exchanger Temperature Thermistor:

White ~Pink at board N/A See example above B B3

~

B12

Surge Protector:

Black ~White 108

Blue ~Brown 108

132 VAC N/A Surge Protector D11 ~3

~

132 VAC N/A Surge Protector D21 ~2

~
With the power off you can check the continuity through the surge protector. Place one meter lead on
the top pin #1 of the surge protector and pin #2 on the bottom of the surge protector. Then check
across top pin #3 and bottom pin #1

, if you read continuity across these two points the surge

protector is good. If you do not get continuity, replace the surge protector.

Remote Controls:

Terminals D

1

10 ~13 VDC digital 1.5K ~1.9K ohms H 1 ~3

Frost Protection:

This unit has four frost protection heaters mounted at different points inside the unit to protect the
water heater from freeze ups. There are two heaters located on the outlet hot water line next to the
thermistor.

26

VI - TROUBLE SHOOTING (cont.)

Using a voltage meter set to the 200 ohm scale, you should have a resistance reading of 26 - 30
ohms through each of these heaters. The heater located on the heat exchanger piping should have a
resistance reading of 81 – 86 ohms and the one located in the water flow sensor valve has a
resistance reading of 16 – 19 ohms. Voltage throughout this circuit should be 120 VAC.

Fuses:
This unit has 2 in line (3) amp glass fuses. Remove the fuse and check continuity through them. If you
have continuity through the fuse, it is good. If you cannot read continuity, the fuse is blown and must
be replaced.

WIRING DIAGRAM

27

VI - TROUBLE SHOOTING (cont.)

WIRING SCHEMATIC

28

VI - TROUBLESHOOTING (cont.)

Troubleshooting Flow Chart

BEFORE CARRYING OUT CHECKS MARKED WITH

A # SIGN, DISCONNECT THE POWER SUPPLY.

Nature of Fault

A. The LED on
the remote
control does not
light up, when
the system is
powered up

Examination

Point Diagnostic Point Values Y/N Action

1. Do you have
voltage to the unit?

2. Is supply voltage
correct?

3. Check surge
protector.

4. Check both 3
amp electrical fuses.

5. Check for short
cuits.

cir

Power source

Measure voltage at
power point.

Inspect visually Do you have 120

# Disconnect and
measure resistance to
confirm if fuse is blown.
Normal < than 1 MΩ

1. Measure resistance of
h solenoid valve. #

eac
Remove connector E
from the PCB before
measuring.
Pink ~ Black (SV0)

1.7 ~ 2.1KΩ

Yellow ~ Black (SV1)

1.7 ~ 2.1KΩ

Brown ~ Black (SV2)

2.1KΩ

1.7

~

(See pag

1
resistance.
# Disconnect sparker
connector F
measure the resistance
between both terminals.

(See pag

3. Chec

e 38)

. Measure the

8

e 37)

k wiring.

and

Do you have 120
VAC at the power
supply?

120 VAC Yes

volts AC across the
blue and brown
wires at the surge

or?

protect

Is fuse blown? Yes

Are valves within
those specified at
left? # Measure
after checking that
there are no broken
wires or shorts.

ance >1MΩ ?

t

esis

Is r

y

e an

her

e t

Ar
shorts?

Yes

No

No

Yes

No

No

Yes

No

Yes

No

Yes

Go to A – (2)

Plug in cord

Go to A – (3)

Check power
supply circuit.
Check fuses.

Go to A – (4)

Go to A – (5)

Go to A – (5)
replace fuse

Go to A – (6)

Go to
A – (6) - 2

Replace gas
valve.

o

Go t
A (5 – 3)

eplace

R
sparker.

ectify

R
/Replace

Service

Procedure

IGE – 9

IGE – 4

6. Check to ensure
you have 120 VAC
across both
terminals feeding
the surge protector.

1. Measure voltage at

the blue and brown
wires.

100 ~120 VAC Yes

29

No

No

eplace PCB

R

Go to A (6 – 2)

Check for
proper voltage
to unit.

IGE – 2

VI - TROUBLESHOOTING (cont.)

Troubleshooting Flow Chart

BEFORE CARRYING OUT CHECKS MARKED WITH

A # SIGN, DISCONNECT THE POWER SUPPLY.

Nature of Fault

B. Digital monitor
lights up, but

tion does

combus
not commence.
(when remotes
are connected).

Error code "72"
displayed on the
digital monitor.

E

xamination

Point Diagnostic Point

2. Measure the voltage

at connector F with
appliance power supply
on.

F – Black ~White

100 ~120 VAC

F7– Blue ~Brown

100 ~120 VAC

7. Check remotes (s)
e connected.)

(wher

1. Check water flow

sensor.

2. Check flame rod

Measure voltage
between remote control
terminals at D.

1. Measure voltage
between red ~black of
connector B

(See page 35)

2. Measure voltage
between yellow
at connector B

(See page 35)

# Measure resistance
between flame rod
terminal C

(See page 36)

.

4

~

.

4

and earth.

1

black

Values Y/N Action

Are values within
those specified at
left.

11 ~13 VDC Digital

11 ~13 VDC

4 ~7 VDC

Resistance > 1MΩ? Yes

Yes

No

Yes

No
Yes

No

Yes
No

No

Go to A – (7)

Replace
transformer

Check cable
for shorts or
broken wires.
Replace
remote
control.
Replace PCB.

Go to B–1-2
Replace PCB.

Go to B - 2
Replace water
flow sensor.

Replace PCB
Replace flame
rod

S

ervice

Procedure

IGE – 7

IGE – 2

IGE – 2

IGE – 3

IGE – 2

Error code "32"
displayed on the
digital monitor.

Error code "61"

yed on the

displa
digital monitor.

3. Check outgoing

water temperature
thermistor.

4. Check

tion fan.

combus

# Disconnect connector
B5 and measure
resistance.
Open circuit: > 1MΩ

cuit: < 1Ω

t cir

Shor

(See page 36)

1. Check motor.
Measure voltage
between black ~red at
connector A

(See page 37)

2. Check fan rotation
sensor. Measure voltage
between black ~yellow
at connector A

(See page 37)

3. Measur
between black ~ white
of connect

(See page 37)

e v

or A

.

1

.

1

e

ag

olt

.

1

Are values as shown
at left?

6 ~45 VDC (Fan on)
0 VDC (Fan off)

11 ~13 VDC

6 ~45 VDC

Yes

No

Yes
N

es

Y
N

es

Y
No

Replace water
temperature
thermistor.
Go to B - 4

Go to B – 5-2

o

o

eplace PCB

R

Go to B – 4-3
Replace PCB

o B – 5

Go t

an

eplace f

R

IGE – 6

IGE – 2

IGE – 2

IGE – 5

30

VI - TROUBLESHOOTING (cont.)

Troubleshooting Flow Chart

BEFORE CARRYING OUT CHECKS MARKED WITH

A # SIGN, DISCONNECT THE POWER SUPPLY.

Nature of Fault

Error code "11"
displayed on

igital monitor.

d

Examination

Point

5. Check ignition

module.

6. Check main gas

solenoid valve (SV0)
Error code 71

7. Check solenoid

valve (SV1)

Diagnostic Point Values Y/N Action

. Measure voltage

1
between grey ~grey of

connector F
module

. # Remove connector

2
F

and measure the

8

resistance between
ignition module and

erminals.

t

3. Chec
sparking.

1. # Disconnect the main
solenoid valve connector
E from the PCB, and
measure the resistance
between pink ~black
(SV0)

2. Measure voltage
between pink ~black of
SV0 connector.

(See page 38)

1. # Disconnect
connector E from the
PCB. Measure resistance
between yellow ~black
of (SV1).

(ignition

8

).(See page 37)

See page 37)

(

k if unit is

90 ~110 VA C

Is resistance >1MΩ?

Is the ignition
module

1.7 ~2.1KΩ

80 ~100 VDC

1.7 ~2.1KΩ

sparking?

Yes

N

Yes
No

Yes

No

Yes

No

Yes
No

Yes

No

Go to B-5-2

o

eplace PCB

R

Go to B-5-3
Adjust/

eplace

R

gnition

i
module

Go to B-6

Adjust/
Replace
electrode

Go to B-6-2

Replace gas
valve

Go to B-7
Replace PCB

Go to B-7-2

Replace gas
valve

Service

Procedure

IGE – 2

GE – 4

I

IGE – 9

IGE – 2

IGE – 9

8. Check

changeover solenoid

e (SV2)

v

al

v

or code "1

r

Er
displayed on

al monit

digit

4"

9. Chec

fuse

or

0. Chec

1
(remaining flame) bi­metal switch

mal

her

k t

k overheat

2. Measure voltage
between yellow ~black
of SV1 connector.

(See page 38)

1. # Disconnect
connect
PCB. And measure
resistance between blue

black (SV2)

~

2. Measure the voltage
between blue ~black or
SV2 connector.

(See page 38)

. # Disconnect

1
connector B
measur
between red ~red.

2. # Disconnect OHS
(remaining flame) bi-

al switch festoon

met
terminal B
measure resistance

een t

betw

h. (

c

swit

or E fr

3

esis

e r

and C3, and

3

minal on

er

See pag

om the

and C

ance

t

e 40)

3

80 ~100 VDC

1.7 ~2.1KΩ

80 ~100 VDC

Is r

Is r

31

ance < 1Ω?

t

esis

tance < 1Ω?

esis

Yes
No

Yes

N

Yes
No

Y

No

Y

N

Go to B-8
Replace PCB

Go to B-8-2

o

es

es

o

eplace g

R
valve

Go to B-9
Replace PCB

0

1

o B-

Go t
Replace

mal fuse

her

t

eplace PCB

R

Replace
remaining
flame bi-metal
switch

IGE – 2

IGE – 9

as

IGE – 2

IGE – 11

IGE – 2

VI - TROUBLESHOOTING (cont.)

Troubleshooting Flow Chart

BEFORE CARRYING OUT CHECKS MARKED WITH

A # SIGN, DISCONNECT THE POWER SUPPLY.

Nature of Fault

C

. Combustion
occurs, but flame
f

ails.

Error code "12"
displayed on
digital monitor.

D. Cannot adjust
water
temperature.

Examination

Point Diagnostic Point Values Y/N Action

1

. Check flame rod.

2. Check ground
wire.

1. Check hot water
thermistor.
(outgoing
thermistor)

2. Check
changeover solenoid
valve (SV3).

3. Check
modulating valve.

4. Check water flow
o.

serv

1

. Measure the voltage

between flame rod

a

t

erminal C

appliance ground.

2. Check to ensure flame
rod bracket is not loose.

Check for faulty ground
wire connections at unit,
receptacle, and ground
rod to home, and for
broken or shorted wires.

# Disconnect connector

and measure the

B

5

resistance between
white

(See page 41)

1. # Disconnect
connector E from PCB
and measur
resistance between
brown ~black.

(See page 39)

2. Measure the v
between brown ~black

e of the changeover

wir
solenoid valve (SV3) at
connector E.

(See pag

1. # Disconnect
modulating valve at C

festoon terminal and
measure resistance at
solenoid t

(See page 42)

2. Measure the voltage
between two harness
terminals at C

(See page 42)

3. Check whether the
manif
when remote control
temperature is altered
betw

, # Measure resistance

1
between red ~blue

es of t

wir
servo connector B

(See page 42)

nd

1

white.

~

e the

e 39)

minals.

er

.

2

essure alters

old pr

een 96° ~1

at

he w

age

olt

40°F

er flow

.

2

2

.

5

~1

50 VAC

I

s it secure?

Are connections
OK?

Resistance values
match table on page
#41

1.7 ~2.1KΩ

80 ~100 VDC

67 ~8

1Ω

5 VDC

2 ~1

he manif

Does t
pressure change?

22 ~26Ω

old

Y

es

No

Y

es

No

Yes

No

Yes
No

Yes
No

Yes
No

Yes
No

Yes
N

Yes
N

es

Y
No

o

o

G

o to C-1-2

Replace PCB

Go to C-2
Replace/

rectify

Check for
other causes
of flame
failure.
Replace or
repair
grounding
circuit to unit.

Go to D – 2
Replace water
temperature

tor.

mis

ther

Go to D – 2-2
Replace

old

manif
assembly

o D – 3

Go t
Replace PCB

Go t

o D – 3-2
replace gas
valve

Go to D – 3-3
Replace PCB

Go to D – 4
Replace gas
valve

o D – 4-2

Go t
Replace water
flow servo

.

sensor

Service

Procedure

I

GE – 2

IGE – 6

IGE – 8

IGE – 2

IGE – 9

IGE – 2

IGE – 9

IGE – 3

32

VI - TROUBLESHOOTING (cont.)

Troubleshooting Flow Chart

BEFORE CARRYING OUT CHECKS MARKED WITH

A # SIGN, DISCONNECT THE POWER SUPPLY.

Nature of Fault

E. Anti-frost
heater does not
work.

Examination

Point Diagnostic Point Values Y/N Action

1. check anti-frost
heater.

k frost

2. Chec
h

sensing swit

c

2. Measure voltage
between orange (+) and
grey (-) of the water flow
servo connector B

.

2

3. Measure voltage
between brown ~grey
of water flow servo
connector B

(Don not

2

turn water on)

(See page 42)

4. Measure voltage
between yellow ~grey
of the water flow servo
connector B

(Do not

2

turn water on)

(See page 42)

1. # Disconnected
connector F

and F

4

5

measure resistance
across each of the
heating elements. (white
wires)

(See page 43)

2. # Read resistance of
the heating element that
is mounted on the front
of the heat exchanger.
(white wires)

(See page 43)

3. Read resistance of
heating elements on the
heat exchanger outlet
hot water line.

(See pag

e 43)

# Disconnect connector

and measure across

F

2

the bi-metal sensing
switch located on the
upper right hand of the
heat exchanger. check
this switch at

emperatures below 37

t
°F. You can place an ice
cube against the switch
to activate it.

(See page 43)

11 ~ 13 VDC

4~ 6 VDC

4~ 6 VDC

348 ~ 375Ω

100 ~ 11 0 Ω

33 ~ 39Ω

esistance <1Ω

Is r

ying ice to

er appl

t

af
this switch for five
minut

es?

Yes
No

Yes
No

Yes
No

Yes
No

Yes
No

Yes
No

Yes
No

Go to 4-3
Replace PCB

Go to D-4-4
Replace water
flow servo
sensor.

Normal
Replace water
flow servo
sensor.

Go to E-1-2
Replace Anti­frost sensing
switch.

Go to E-2
Replace Anti­frost heater
that is
defective.

Go to E-2
Replace Anti­frost heater
that is
defective.

k wiring

Chec

eplace Anti-

R
frost sensing
swit

c

h.

Service

Procedure

IGE – 2

IGE – 3

IGE – 3

33

VI - TROUBLESHOOTING (cont.)

Troubleshooting Procedure

BEFORE CARRYING OUT CHECKS MARKED WITH A # SIGN, DISCONNECT THE POWER SUPPLY.

Unit’s wiring diagram can be found on page 27.

Appliance fails to operate (even remote control fails to operate).

1) Is the fuse blown?
Check fuse.

a. Disconnect unit from power supply.
b. # Measure resistance to check the electric fuse

Fuses are located in plastic

holders in the main harness,

on the lower right hand side

of the appliance.

(3 amp)

Normal: less than 1Ω
If normal, proceed to check item 2 below.
Faulty: Replace 3 amp glass fuse. If the fuse
blows again, investigate cause of short circuit.

2) Is the main transformer normal?

Check the transformer.

a. Measure the voltage and/or resistance at

connector F, black ~white wires.

Normal: 100 ~120 VAC

51 ~63 Ω resistance

Faulty: Check for 120 ~125 VAC at the surge

protect
F

.

7

or, blue

brown wir

~

es, connector

Resistance reading 51 ~63 Ω

If normal, check item 3 on next page.
Faulty: Replace the transformer.

(Service Procedure IGE-7, page 49)

34

VI - TROUBLESHOOTING (cont.)

3) Is the remote control normal?

Check voltage between the two remote control cable
connectors.

a. Check the voltage between terminals on the

remote control terminal mount D

.

1

Normal: 11 ~13 VDC
If normal, check for an open circuit or short before
replacing the remote control.

Faulty: Replace PCB.

(Service Procedure IGE-2, page 47)

No combustion (despite remote control indication)

1) Is the water flow sensor normal?

Check the water flow sensor.
a. Check the voltage at PCB connector B4 , red and

black wires.
Normal: 11 ~ 13 VDC or 5.8 ~ 6.4K Ω
If normal, check (b) below.
Faulty: Replace the PCB.

(Service Procedure IGE-2, page 47)

b. Check the voltage at PCB connector B4, yellow and

black wires.
Normal: 4 ~ 7 VDC or 1M ~ 1.2M Ω.
If normal, proceed to check item 2 on next page.
Faulty: Replace the water flow sensor.

(Service Procedure IGE-2, page 47)

35

VI - TROUBLESHOOTING (cont.)

BEFORE CARRYING OUT CHECKS MARKED WITH A # SIGN, DISCONNECT THE POWER SUPPLY.

2) Is the flame rod normal? Error “72” is displayed

Checking the flame rod.
a. # Detach the flame rod terminal C1, and re-attempt

operation.
(“72 is displayed)
Proceed to check item 3 below.
(no “72” displayed)
Inspect flame rod wiring for current leak and inspect
flame rod for carbon build-up.

Measure resistance between the flame rod
Terminal C1 and the appliance earth.
Normal: 1 M Ω or more.
If normal, replace the PCB unit.

(Service Procedure IGE-2, page 47)

Faulty: Replace the flame rod.

See page 40 for additional information and resistance values
pertaining to the flame rod.

3) Is the water temperature thermistor normal?

If error “32” is displayed, check the water
temperature thermistor.
a. # Disconnect connector B5, and measure resistance of

the white ~ white wires.

Resistance > 1 M Ω = open circuit.
Resistance < 1 Ω = short circuit.

Normal: Proceed to check item 4 on the next page.
Faulty: Replace the water temperature thermistor.

(Service Procedure IGE-6, page 48)

See page 41 for additional information and
resistance readings pertaining to the
temperature themistor.

36

VI - TROUBLESHOOTING (cont.)

BEFORE CARRYING OUT CHECKS MARKED WITH A # SIGN, DISCONNECT THE POWER SUPPLY.

4) Is the combustion fan motor normal?

Motor check.
If error “61” is displayed, check the combustion fan.

a. Measure voltage at connector A1. Black and red wires.

Normal: 6 ~ 45 VDC (Fan on)
0 VDC (Fan off)
If normal, check item b below.
Faulty: Replace the PCB unit.

(Service Procedure IGE-2, page 47)

Fan revolution sensor check.

b. Measure voltage at connector A1, black and yellow wires.

Normal: 11 ~ 13 VDC or 3.1 ~ 3.7 K Ω
If normal, check item c below.
Faulty: Replace the PCB unit.

(Service Procedure IGE-2, page 47)

c. Measure voltage at connector A1, black and white wires.

Normal: 6 ~ 45 VDC or 9 ~ 9.4 K Ω
(33 ~ 400 Hz.)
If normal, proceed to check item 5 below.
Faulty: Replace the combust ion fan motor.

(Service Procedure IGE-5, page 48)

5) Is the ignition module operating normally?

.

Check the sparker module.

a. Measure voltage at connector F8, grey and grey wires.

Normal: 90 ~ 110 VAC
0 VDC (when fan is off)
If normal, check b below.
Faulty: Replace the PCB unit.

(Service Procedure IGE-2, page 47)

b. # Disconnect connector F8, and measure the

resistance between the two sparker terminals.

Normal: > 1 M Ω
Faulty: Replace the igniter module.

(Service Procedure IGE-5, page 48)

Electrode gap should be 3/16” to 1/4" .

37

VI - TROUBLESHOOTING (cont.)

BEFORE CARRYING OUT CHECKS MARKED WITH A # SIGN, DISCONNECT THE POWER SUPPLY.

6) Is the main gas solenoid valve (SV0) operating normally?

If error “11” or “71” is displayed, check the main gas solenoid
valve.
a. # Disconnect the main gas solenoid valve (SV0)

connector and measure the resistance at the solenoid
terminals.
Normal: 1.7 ~ 2.1 K Ω
If normal, check b below.
Faulty: Replace gas valve.

(Service Procedure IGE-9, page 50)

b. Measure voltage at the main gas solenoid (SV0)

Pink and black wires.
Normal: 80 ~ 100 VDC
If normal, proceed to check item 7 below.
Faulty: Replace PCB unit.

(Service Procedure IGE-2, page 47)

7) Is the change over solenoid (SV1) operating normally?

8) Is the change over solenoid (SV2) operating normally?

If error “11” or “71” is displayed, check the change over
solenoid (SV1).
a. # Disconnect t

he change over solenoid (SV1)
connector, and measure resistance at the solenoid
terminals.
Normal: 1.7 ~ 2.1 K Ω
If normal, check b below.
Faulty: Replace the gas valve.

(Service Procedure IGE-9, page 50)

b. Measure voltage at the change over solenoid

(SV1) yellow ~ black wires.
Normal: 80 ~ 100 VDC
If normal, check 8 below.
Faulty: Replace PCB unit.

(Service Procedure IGE-2, page 47)

If error “11” or “71” is displayed, check the change over

solenoid (SV2).

a. # Disconnect the changeover solenoid (SV2) connector,

and measure the resistance at the solenoid terminals.
Normal: 1.7 – 2.1 K Ω If normal, chec

k b below.

Faulty: Replace the gas valve.

(Service Procedure IGE-9, page 50)

b. Measure the voltage at the changeover solenoid (SV2),

blue – black wires.
Normal: 80 – 100 VDC
If normal, check 9, on next page.
Faulty: Replace the PCB unit.

(Service Procedure IGE-2, page 47)

38

VI - TROUBLESHOOTING (cont.)

BEFORE CARRYING OUT CHECKS MARKED WITH A # SIGN, DISCONNECT THE POWER SUPPLY.

9) Is the change over solenoid (SV3) operating normally?

If error “11” or “71” is displayed, check the change over

solenoid (SV3).

a. # Disconnect the changeover solenoid (SV3)

connector, and measure the resistance at the
solenoid terminals.
Normal: 1.7 – 2.1 K Ω
If normal, check b below.
Faulty: Replace the manifold assembly.

(Service Procedure IGE-8, page 49)

b. Measure the voltage at the changeover solenoid

(SV3), brown – black wires.
Normal: 80 – 100 VDC
If normal, reconfirm gas pressures are correct.
Faulty: Replace the PCB unit.

(Service Pr

ocedure IGE-2, page 47)

39

VI - TROUBLESHOOTING (cont.)

BEFORE CARRYING OUT CHECKS MARKED WITH A # SIGN, DISCONNECT THE POWER SUPPLY.

Error code “14” Check the thermal fuse.
a. # Disconnect connector B3 and C3, measure the

resistance between the red – red wires.
Normal: Less than 1 Ω
If normal, check b below.
Faulty: Check manifold gas pressure. Check heat
exchanger for cracks and/or separations. If there is
nothing abnormal, replace the thermal fuse.

(Service Procedure IGE-11, page 51)

b. Check bi-metal switch, (remaining flame safety

device). Measure resistance between the two
terminals at B3 and C3.
Normal: Less than 1 Ω
If normal, process to item a below.
Faulty: Replace the bi-metal switch.

Combustion stops due to flame failure

1) Is the flame rod functioning normally?

2) Is the earth lead wire connected?

a.

Measure the voltage between the flame rod
terminal C

and the appliance earth.

1

Normal: 5 – 150 VAC from yellow to ground.
If normal, check b below.
Faulty: Replace the PCB unit.

(Service Procedure IGE-2, page 47)

b. Check that the flame rod attachment is not loose.

Normal: Replace the PCB unit.

(Service Procedure IGE-2, page 47)

Faulty: Secure the flame rod bracket.

a. Check for defective earth terminal, or an open

circuit or short. If normal, investigate other
possible causes for the flame failure.
(Eg. Is the gas valve open ? Is the filter mesh

ked ?) Was proper venting material used?

bloc
Did you regulate your gas supply pressure to the
proper gas pressure for gas type being used?

Faulty: Ensure unit is properly grounded. Check
ground circuit outside home at service pole.
There should be an eight foot ground rod driven
in the earth and a copper lead tied to the service
meter. Ensure connection on ground rod is tight.

40

VI - TROUBLESHOOTING (cont.)

BEFORE CARRYING OUT CHECKS MARKED WITH A # SIGN, DISCONNECT THE POWER SUPPLY.

Unable to adjust hot water temperature

1) Is the water temperature thermistor operating normally?

a. # Disconnect the connector B5, and measure the

resistance between the white wires, see below
for resistance readings.

Thermistor resistance valves:

59 ºF = 11.4 ~ 14 K Ω
86 ºF = 6.4 ~ 7.8 K Ω

113 ºF = 3.6 ~ 4.5 K Ω
140 ºF = 2.2 ~ 2.7 K Ω
221 ºF = 0.6 ~ 0.8 K Ω

Normal: Proceed to check item 2 below.
Faulty: Replace the water temperature

thermistor.

(Service Procedure IGE-6, page 48)

2) Is the change over solenoid (SV1) normal?

a. # Disconnect the changeover solenoid (SV1)

connector

, and measure resistance at the
solenoid terminals.
Normal: 1.7 ~2.1 K Ω
If normal, proceed to b.

Faulty: Replace the gas valve.

(Service Procedure IGE-9, page 50)

b. Measure the voltage at the changeover solenoid

(SV1) yellow ~black wires.
Normal: 80 ~100 VDC
If normal, proceed to check item 3, on next

page.
Faulty: Replace the PCB unit.

(Service Procedure IGE-2, page 47)

41

BEFORE CARRYING OUT CHECKS MARKED WITH A # SIGN, DISCONNECT THE POWER SUPPLY.

3) Is the modulating valve operating normally? Error code 52

a. # Disconnect the modulating valve festoon C2

terminals and measure the resistance at the terminals.
Normal: 67 ~81 Ω
If normal, check b.

Faulty: Replace gas valve.

(Service Procedure IGE-9, page 50)

b. Re-connect terminal C2 and measure voltage

across the pink ~pink wires when the unit is firing.

Normal: 2 ~15 VDC

If normal, check c below.
Faulty: Replace the PCB unit.

(Service Procedure IGE-2, page 47)

c. Investigate the change in the manifold gas

pressure, when the remote control pre-set
temperature is altered from 96 ~140 ºF.

Normal: If the manifold pressure changes,
proceed to check item 4 below.

DO NOT

adjust manifold pressures.
Faulty: Replace gas valve.

(Service Procedure IGE-9, page 50)

4) Is the water flow servo normal?

a. # Disconnect connector B2 and measure the

resistance of the water flow servo, red ~blue wires.

Normal: 22 ~26 Ω
If normal, proceed to b.

Faulty: Replace the water flow servo and sensor.

(Service Procedure IGE-2, page 47)

b. Disconnect connector B2 , and measure the

voltage on the PCB unit side, were the orange
(+), and/or grey or black (-) wires connect to the board.
Normal: 3.3 ~4.5 VDC
If normal, proceed to c.

Faulty: Replace the PCB unit.

(Service Procedure IGE-2, page 47)

c. With connector B2, connected (do not turn water

ON … wait for the water flow servo to return to
fully open), measure the voltage at the brown

~

grey wires.

Normal: 4 ~6 VDC vent limiter OFF
Faulty: Replace the water flow servo and sensor.

(Service Procedure IGE-2, page 47)

d. With connector B2 , connected (do not turn

water ON… wait for the water flow servo to
return to fully open), measure the voltage at the
yellow ~grey wires.
Normal: Less than 0.5 VDC when unit is set at

120 °F and there is no water flowing through the unit.
Faulty: Replace water flow servo and sensor.

(Service Procedure IGE-2, page 47)

42

BEFORE CARRYING OUT CHECKS MARKED WITH A # SIGN, DISCONNECT THE POWER SUPPLY.

Anti-frost heaters do not operate

1) Are the ceramic anti-frost heaters operating normally?

a. # Disconnect connector F4, and measure the

resistance of the heater mounted in the water
flow control valve, these are white wires.
Disconnect connector F5, and measure the
resistance of the heater in the outlet line
connector. See connectors in the first and second
picture to the left.
Normal: 348 ~375 Ω
If normal, proceed to b.

Faulty: Replace defective element.

b. # Take an ohm meter and read resistance across

the heater on the face of the heat exchanger. The
resistance across this element is listed below. See
third picture to the left for location of this element.
These are white wires.
Normal: 100 ~110 Ω
If normal, proceed to check item 2 below.

Faulty: Replace defective anti frost heater
assembly.

c. Check resistance of the two heat exchanger

outlet line heater elements, as shown in the
third picture to the left. Check across each heater
independently.

Normal: 33 ~39 Ω
Faulty: Replace defective anti frost heater

assembly.

2) Is the frost sensor switch operating normally?

a. # Disconnect connector F2, and measure the

resistance through this switch, measure when
atmospheric temperature is 39°F + or – 3°F. (See Note)
See drawing to left for location of this bimetal
switch. These are white wires to this switch.
Normal: Less than 1 Ω
If normal, check wiring har
(100 volts AC)
Faulty: Replace the frost sensing bimetal switch.

Note: If the atmospheric temperature is too high,

he switch with ice.

cool t

ness for defects.

43

VII - GAS PRESSURE SETTING PROCEDURE

All settings/adjustments must be performed

by a qualified Service Technician.

1. Turn unit off at power source and turn off the gas to the water heater.

2. Remove the front cover from the water heater.

3. Remove the gas pressure test port plug. Connect manometer to this port. (See Figure #1 for
location of the test port plug.) Turn on the gas and power to the water heater.

4. Flow water through the water heater at the maximum flow rate obtainable, at least three
gallons per minute.

5. To adjust the "
control dip switch #7 to the "

Low" fire pressure, use small (pocket) common screwdriver to set combustion

ON" position, and switch #8 to the "OFF" position (see figure #2

for location of combustion control switches.) This will put the unit into forced low fire. Check
the pressure reading on your manometer. If the pressure needs adjusting, remove the rubber
plug from the bottom of the water heater casing (located beneath the regulator), to access the
regulator adjustment screw. Adjust the regulator screw to achieve the correct gas pressure.
(See figure #1 for location of the regulator adjustment screw.) Below are the proper pressures

Low" fire, per gas type.

for "

Propane 0.88" w.c. @ 10" w.c. supply (Low fire rate of 15,000 BTU's)
Natural 0.56" w.c. @ 6" w.c. supply (Low fire rate of 15,000 BTU's)

6. To adjust the "High" fire pressure, use small (pocket) common screwdriver to set combustion
control dip switch #7 to the "ON" position, and switch #8 to the "ON" position (see figure #2
for location of the combustion control switches), this will put the unit into forced high fire.
Check the pressure reading on your manometer. If the pressure needs adjusting, use small
(pocket) common screwdriver to adjust the high pressure "

high pressure setting pot"). Below are the proper pressures for "High" fire.

"

Propane 5.1" w

.c. @ 10" w.c. supply (High fire rate of 199,000 BTU's)

Pot". (See figure #2 for location of

Natural 3.4" w.c. @ 6" w.c. supply (High fire rate of 199,000 BTU's)

7. Verify both low and high fire pressures by placing the water heater into "Forced Low Fire" and

Forced High Fire" as described in steps 5 and 6 above. This completes the gas pressure

"
setting procedure. Dip switches #7 and #8 (combustion control switches), MUST be returned
to the "

Off" position, after setting the pressures.

Refer to page 12 for factory default dip switch settings.

44

WARNING

Dip switched #7 and #8 (combustion control switches) MUST

be returned to the "OFF" position, after setting pressures.

8. Turn off the gas to the water heater. Remove the manometer connection. Reinstall the
pressure port plug. Turn on the gas to the water heater and check for gas leaks around
test port with a leak solution.

9. Reinstall the front cover and place the unit back into operation.

10. Verify the proper water temperature, as set on the controller at your outlets. If controllers are
not being used the output temperature should be 120°F, for residential models or 140˚ for
commercial models.

Figure #1 Figure #2

45

VIII - SERVICE PROCEDURE

NOTE: Before proceeding with dismantling, be sure to follow the CAUTION
instructions before each explanation. Always disconnect the electrical supply, turn off water
and gas supply service valves, and drain all water from the unit before proceeding.

Only trained and qualified service agencies should attempt to repair this product.

Service Procedure

IGE - 1. Removal of the Front Panel..........................................................47

IGE - 2. Removal of the PC Board.............................................................47

IGE - 3. Removal of the Water Flow Control and Sensor ..........................47

IGE - 4. Removal of the Ignition Module...................................................48

IGE - 5. Removal of the Combustion Fan ..................................................48

IGE - 6. Removal of the Water Temperature Thermistor ..........................48

IGE - 7. Removal of the Transformer.........................................................49

IGE - 8. Removal of the Burner and Burner Manifold...............................49

IGE - 9. Removal of the Gas Valve Assembly ............................................50

IGE - 10. Removal of the Heat Exchanger Assembly ..................................50

IGE - 11. Removal of the Thermal Fuse ......................................................51

Re-assembly in all tasks listed above in the reverse order of dismantling (unless stated otherwise.)

46

WARNING

Dip switched #7 and #8 (combustion control switches) MUST

be returned to the "OFF" position, after setting pressures.

Dip switch #1 MUST be returned to the proper position

based upon the length of vent pipe (see page 13).

IMPORTANT

When dismantling the unit you should always isolate
the following items:

• Gas supply

• Electrical supply

• Water supply

• Drain all water from the appliance

The following diagram may be of assistance in locating
the above.

IGE - 2. Removal of PC board

CAUTION

120 volt potential exposure. Isolate the appliance and
reconfirm power has been disconnected using a
multimeter.

a. Remove the two (2) screws holding the

PCB in place with a Phillips screw driver,
then pull the PC board out of the
appliance.
Disconnect all connectors.

IGE - 1. Remo

120 volt potential exposure. Isolate the appliance and
reconfirm power has been disconnected using a
multimet

a. Remove the four (4) screws holding the

val of the Front Panel

CAUTION

er.

panel in place with a Phillips driver.

IGE - 3. Removal of the Water Flow Sensor and
Water Flow Control Valve Assembly

CAUTION

20 volt potential exposure. Isolate the appliance and

1
reconfirm power has been disconnected using a
multimeter.

a. Remove one (1) Phillips screw from the

heat exchanger water supply line and (1)
screw from the bypass valve assembly. Lift

he water line retainer up and over the

t
housing it attaches to, pull water line

ards yourself to disconnect water lines

w

o

t
from the assembly. Inspect o-rings for
damage, replace if defective.

47

a. Remove the four (4) Phillips screws that

secure the water inlet filter housing to the
unit. See picture below for location of
screws. Once screws are removed reach
into the unit and pull up and out on the
flow control assembly to remove it from
the appliance. Inspect o-ring for damage.

b. Disconnect wiring harness from assembly

and remove the water flow control
assembly from the unit.

IGE - 5. Removal of the Combustion Fan:

CAUTION

120 volt potential exposure. Isolate the appliance
and reconfirm power has been disconnected
using a multimeter.

a. Disconnect wiring harness from fan motor.

b. Remove the (2) Phillips screws that secure

the combustion fan motor to the fan
housing. Pull the fan motor assembly
towards yourself to remove it.

IGE - 4. Removal of Ignition Module:

CAUTION

120 volt potential exposure. Isolate the appliance
and reconfirm power has been disconnected
using a multimeter.

a. Remove one (1) Phillips screw that secures

the sparker module to the unit casing.

b. Disconnect high tension lead and

connector.

IGE - 6. Removal of the Water Temperature
Thermistor:

CAUTION

120 volt potential exposure. Isolate the appliance
and reconfirm power has been disconnected
using a multimeter.

a. Remove the two (2) Phillips screws that

secure the thermistor in place to remove
the water outlet temperature thermistor.

48

IGE - 7. Removal of Transformer:

CAUTION

120 volt potential exposure. Isolate the appliance
and reconfirm power has been disconnected
using a multimeter.

a. Remove the combustion fan motor

assembly as described in section 5-a,b.

b. Remove the two (2) Phillips screws to

release the transformer.

c. Disconnect wiring harness connectors to

transformer and pull out towards you.

d. To remove the burner assembly remove

(8) Phillip screws around the sight glass
panel. Remove this panel.

e. Locate the (2) Phillip screws inside the

burner chamber that hold the burner
assembly in place. Remove these two
screws, grip the burner assembly and slide
it out of the combustion housing.

IGE - 8. Removal of Burner Manifold and the
Burner:

CAUTION

120 volt potential exposure. Isolate the appliance
and reconfirm power has been disconnected
using a multimeter.

a. To remove the burner manifold, remove

(6) Phillip screws around the burner plate
as shown in the upper right picture.

b. Remove the (3) Phillip screws at the gas

valve assembly.

c. Grip the burner manifold and remove it

from the unit.

f. If you need to remove each burner from

this housing remove the (2) Phillip screws
on each side of the burner, as shown
below.

49

IGE - 9. Removal of the Gas Valve Assembly:

CAUTION

120 volt potential exposure. Isolate the appliance
and reconfirm power has been disconnected
using a multimeter.

b. Remove the heat exchanger water

connection lines, refer to section 3-a.

c. Remove the three (3) Phillip screws

securing the gas manifold assembly to the
gas control valve.

a. Remove the burner manifold, refer to

section 8-a,b,c.

b. Remove the four (4) Phillips screws that

hold the gas connection and gas control
valve in place at the bottom of the unit.
Pull the gas connection down to
disconnect it from the gas valve assembly.
Inspect o-ring for damage and/or defects.
Ensure o-ring is in place when
re-assembling this connection.

d. Remove the six (6) Phillip screws that

secure the heat exchanger assembly in
place.

e. Disconnect connectors B1, B5, B6, C1, C3,

F1and F8. These are the igniter, flame rod,
thermo-fuse, hot water inlet and outlet
thermistor, and the anti-freeze heater
connections.

f. Pull the heat exchanger out of the heater.

c. Disconnect connectors from solenoids,

note which connector goes to each
solenoid, along with the proper wire
colors. Pull gas valve assembly out of unit.

IGE - 10. Removal of Heat Exchanger:

CAUTION

120 volt potential exposure. Isolate the appliance
and reconfirm power has been disconnected
using a multimeter.

g. Transfer all components found on the old

heat exchanger over to the new exchanger.

a. Remove PCB unit, refer to section 2-a.

50

IGE - 11. Removal of Thermal Fuse:

CAUTION

120 volt potential exposure. Isolate the appliance
and reconfirm power has been disconnected
using a multimeter.

This process may involve removing the heat
exchanger if the thermo-fuse on the rear of the
heat exchanger is blown.

(Service Procedure IGE-10, page 50)

a. The unit has four thermal fuses, see

picture below for location.

b. Disconnect and remove the thermal fuse.

Re-install new thermo fuse using the
existing thermo fuse clips. Reconfirm inlet
and manifold gas pressures are set to
the proper setting. Ensure unit matches
gas type being supplied to the heater.

51

IX - FLUSHING PROCEDURE FOR LIME

SCALE REMOVAL FROM HEAT EXCHANGER

The amount of calcium carbonate (lime) released from water is in direct proportion to water temperature and
usage. The higher the water temperature or water usage and the harder the water (more dissolved calcium
carbonate), the more lime deposits are dropped out of the water. This is the lime scale that forms in pipes,
water heaters and on cooking utensils.

Lime accumulation reduces the efficiency and longevity of the heat exchanger coil and will cause the water
heater to malfunction. The lime scale may need to be periodically removed from the heat exchanger (indicated
by the "LC" code on the remote display). The usage of water softening equipment greatly reduces the
hardness of the water. However, this equipment does not always remove all of the hardness (lime). The heat
exchanger may occasionally need to be flushed to clear out the lime deposits. Use the following procedure
and diagram to flush the heat exchanger and remove the lime scale.

1. Disconnect power to the water heater.

2. Close valves in the cold water inlet and outlet supply.

3. Connect PVC hoses (may use garden hose to the drain valve outlet fittings). Connect a
circulator pump to the hose connected to the cold water inlet. See figure 11 for hose and
circulator connections.

4. Pour 4 gallons of fresh vinegar into a 5 gallon bucket.

5. Place the ends of the hose into the bucket.

6. Open t

he dr

ves to the hose fittings.

ain val

7. Turn on power to the circulating pump and allow the vinegar to circulate through the heat
exchanger coil for at least 45 minutes. Heavily limed heat exchangers may require several

s.

hour

8. Turn off power to the circulating pump.

9. Run hose fr

om hot water outlet to a drain.

10. Close the drain valve on the cold water inlet.
Leave hot water drain valve open. Open cold
water inlet to flush with fresh water.

11. Allow water to flow out of the hose for 5
minutes to flush vinegar from the water heater.

12. Shut off cold water inlet valve. Remove filter
screen and clean out any sediment. Reinstall.

Close the hot water drain valve. Open the

3.

1

cold water inlet and hot water supply valves.

14. Disconnect the hoses from the drain valve
connections.

15. Restore power to the water heater and check

ation.

oper

52

X - PARTS BREAKDOWN

DISASSEMBLED VIEW - CABINET

53

X - PARTS BREAKDOWN

DISASSEMBLED VIEW - INTERNALS

54

X - PARTS BREAKDOWN

DISASSEMBLED VIEW - INTERNALS

55

X - PARTS BREAKDOWN

DISASSEMBLED VIEW - ELECTRICAL

56

PARTS LIST

umber Description Quantity

N
001 Front Panel Assembly 1
002 Casing Assembly 1

03 Wall Installation Bracket 1

0
004 Connection Reinforcement Panel 1
005 Heat Protection Plate 1

06 Rubber Bushing 1

0
007 Front Panel Gasket 1
008 Front Panel Gasket - Side 1

09 Front Air Inlet Grill 1

0
011 Rubber Bushing 1
102 Gas Connection (3/4" NPT) 1

03 Burner Unit Assembly 1

1
104 Burner Case Front 1
105 Burner Case Bottom Panel 1
106 Burner Air Orifice Plate 1
107 Bunsen Burners 16
108 Burner Case Back Panel 1
109 Damper Plate 1
110 Manifold Assembly – Natural Gas 1
110 Manifold Assembly – L.P. Gas 1
111 Gasket – Combustion Chamber 1
112 Lower Gasket – Combustion Chamber 1
113 Combustion Chamber Pressure Tap Screw 1
115 Combustion Chamber Front Plate 1
116 Spark Ignition Electrode 1
117 Flame Sense Rod 1
118 Electrode Gasket 1
119 Electrode Holder 1
120 Upper Combustion Chamber Gasket 1
122 Combustion Blower Assembly 1
123 Blower Motor 1
127 Blower Mounting Bracket 1
128 Blower Gasket 1
132 Combustion Chamber Bracket 1
136 Flue Outlet 1
137 Flue Outlet Gasket 1
138 Flue Outlet Gasket - 6 1

40

1
400 Water Inlet – _" NPT 1

1 Water Flow Servo and Sensor Assembly 1

40
402
403 By-pass Servo Assembly 1
404 Stop Bracket 2
405
406 Water Filter Assembly 1
407 Filter Plug 1
408
409 Stop Bracket 1
410 Plug Band - Small 1

1

1

4
702 PCB Cover - Side 1
703 PCB Cover - Front 1
704
705 Ignitor Bracket 1
706 Ignitor 1
707
708 Spark Electrode Boot 1
709 Thermistor 2

0 Thermistor Clip - Large 1

1

7

1

1

7

Heat Ex

R

changer – Complete Assembly 1

ier 1

ectif

Plug Band 1

Hot Wat

er Outlet – _" NPT 1

Drain Valve 1

ansformer Assembly 1

r

T

ension Lead

High T

use Clip

mal F

Ther

57

1

5

15 120v Valve Heater Assembly 1

7
716 Anti-Frost Heater Clip 2
717 Anti-Frost Heater Clip A 1

18 Anti-Frost Heater Clip 1

7
720 Power Supply Harness 1
721 Fuse Harness 1

22 100v Harness 1

7
723 Solenoid Valve Harness 1
725 Thermal Fuse Harness 1

26 Mold-type Limit Switch 1

7
730 PCB Assembly 1
731 Surge Protector 1

32 Frost Sensing Switch 1

7
733 120V Anti-Frost Heater Assembly 1
734 Sensor Harness - 2 1

00 Screw 8

8
801 Screw 4
802 Washer 4
803 Screw 3
804 Screw 1
805 Screw 3
806 Screw 4
807 Washer 4
808 Screw 4
809 Screw 4
810 O-Ring 3
813 O-Ring 2
814 O-Ring 2
815 O-Ring 2
817 O-Ring 1
818 Gasket 2
238-44959-00 Installation and Operating Instructions 1
239-44509-00 Main Remote Temperature Control - Residential 1
239-44510-00 Main Remote Temperature Control - Commercial 1
239-44507-00 Bathroom Remote Temperature Control 1
239-44508-00 2nd Bathroom Remote Temperature Control 1

58

Notes

59

800.900.9276 • Fax [phone] (Customer Service, Service Advisors)

20 Industrial Way, Rochester, NH 03867 • 603.335.6300 • Fax [phone]
1869 Sismet Road, Mississauga, Ontario, Canada L4W 1W8 • 905.238.0100 • Fax [phone]

www.Laars.com Litho in U.S.A. © Laars Heating Systems 0806 Document 11014