Mi-T-M HOM-SERIES User manual

HOM-SERIES Hot Water Heater module Operator's Manual 1
©Copyright 2009 Form #37-1090-E/F/S-020210
OPERATING INSTRUCTIONS FOR
HOM-SERIES
HOT WATER HEATER MODULES
CAUTION
RISK OF INJURY!
READ MANUAL BEFORE OPERATING!
This manual is an important part of the
heater module and must
remain with the unit when you sell it!

2 HOM-SERIES Hot Water Heater module Operator's Manual
TABLE OF CONTENTS
INTRODUCTION ................................................................................................................................................3
IMPORTANT SAFETY WARNINGS................................................................................................................4-9
RISK OF EXPLOSION OR FIRE.....................................................................................................4
RISK OF ASPHYXIATION ...............................................................................................................5
RISK OF ELECTROCUTION OR ELECTRICAL SHOCK ...............................................................6
RISK OF INJECTION OR SEVERE CUTTING INJURY .................................................................7
RISK OF BURNS.............................................................................................................................8
RISK OF BURSTING.......................................................................................................................8
RISK FROM MOVING PARTS ........................................................................................................8
RISK OF BODILY INJURY ..............................................................................................................9
INSTALLATION ...........................................................................................................................................10-13
LOCATION AND PLACEMENT .....................................................................................................10
ELECTRICAL.................................................................................................................................10
VENTILATION ............................................................................................................................... 11
WATER SUPPLY ...........................................................................................................................12
HIGH PRESSURE CONNECTION................................................................................................12
PRE-OPERATION CHECKLIST....................................................................................................13
PREPARATION ................................................................................................................................................14
ATTIRE ..........................................................................................................................................14
PRE-START SAFETY INSPECTION.............................................................................................14
OPERATING INSTRUCTIONS.........................................................................................................................16
FLUSHING THE SYSTEM ............................................................................................................16
HOT WATER OPERATION............................................................................................................16
SHUTDOWN .................................................................................................................................16
MAINTENANCE ..........................................................................................................................................17-18
PREVENTIVE MAINTENANCE ....................................................................................................17
WINTERIZING...............................................................................................................................17
MAINTENANCE CHARTS..............................................................................................................................17
BURNER ADJUSTMENTS .............................................................................................................................18
TROUBLESHOOTING ................................................................................................................................19-20
STATEMENT OF WARRANTY.........................................................................................................................21
NATIONAL CODES:
ANSI Z223.1 (NFPA NO. 54) NATIONAL FUEL GAS CODE.
NFPA NO. 70 (NEC) NATIONAL ELECTRICAL CODE.
CSA B149.1 GAS INSTALLATION CODE.
CSA C22.1 CANADIAN ELECTRICAL CODE PART 1.

HOM-SERIES Hot Water Heater module Operator's Manual 3
INTRODUCTION
Congratulations on the purchase of your new HOM-SERIES Heater Module! You can be assured your heater module
was constructed and designed with quality and performance in mind. Each component has been rigorously tested to
ensure the highest level of acceptance.
This operator's manual was compiled for your benet. By reading and following the simple safety, installation, operation,
maintenance and troubleshooting steps described in this manual, you will receive years of trouble free operation from
your new heater module. The contents of this manual are based on the latest product information available at the time
of publication. The manufacturer reserves the right to make changes in price, color, materials, equipment, specications
or models at any time without notice.
! IMPORTANT !
These paragraphs are surrounded by a "SAFETYALERT BOX." This box is used to designate
and emphasize Safety Warnings that must be followed when operating this heater module.
Accompanying the Safety Warnings are "signal words" which designate the degree or level
of hazard seriousness. The "signal words" used in this manual are as follows:
DANGER: Indicates an imminently hazardous situation which, if not avoided,
WILL result in death or serious injury.
WARNING: Indicates a potentially hazardous situation which, if not avoided,
COULD result in death or serious injury.
CAUTION: Indicates a potentially hazardous situation which, if not avoided MAY
result in minor or moderate injury.
The symbols set to the left of this paragraph are "Safety Alert Symbols." These symbols
are used to call attention to items or procedures that could be dangerous to you or other
persons using this equipment.
ALWAYS PROVIDE A COPY OF THIS MANUAL TO ANYONE USING THIS EQUIPMENT. READ
ALL INSTRUCTIONS BEFORE OPERATING THIS HEATER MODULE AND ESPECIALLY POINT
OUT THE "SAFETY WARNINGS" TO PREVENT THE POSSIBILITY OF PERSONAL INJURY TO
THE OPERATOR.
Once the unit has been removed from the box, immediately write in the serial number of your unit in the space provided
below.
SERIAL NUMBER_________________________________
Inspect for signs of obvious or concealed freight damage. If damage does exist, le a claim with the transportation
company immediately. Be sure that all damaged parts are replaced and that the mechanical and electrical problems
are corrected prior to operation of the unit. If you require service, contact your customer service.
Please have the following information available for all service calls:
1. Model Number
2. Serial Number
3. Date and Place of Purchase

4 HOM-SERIES Hot Water Heater module Operator's Manual
POTENTIAL CONSEQUENCE PREVENTION
SAFETY WARNINGS
WARNING: When using this product, basic precautions should always be observed, including the following:
READ ALL SAFETY WARNINGS BEFORE INSTALLING AND USING HEATER MODULE
HAZARD
RISK OF
EXPLOSION OR FIRE
Serious injury or death may
occur from normal sparks in the
multiple ignition sources.
Never leave operating machine unattended.
Install the heater module where open ame or
torch is permitted.
Always operate heater module in a well
ventilated area free of ammable vapors,
combustible materials including dust or
gases.
Do not allow lint or dust to collect in burner
area.
Do not use this heater module to spray
ammable liquids! Flammable liquids can
create fumes which can ignite.
This heater module has multiple safety devic-
es which should never be altered, modied,
removed or made inoperative. If a device
fails, replace immediately with only genuine
manufacturer replacement part.
Serious injury or death may
occur if system safety's are not
properly maintained.
Serious injury or death may
occur from improper installation. Installation of this unit including all gas piping must comply with all local, state and national
codes. (Standards to be followed include the
National Fuel Gas Code ANSI Z223.1/NFPA
No. 54. In Canada; Refer to the CSA B149.1
Gas Installation Code).

HOM-SERIES Hot Water Heater module Operator's Manual 5
POTENTIAL CONSEQUENCE PREVENTION HAZARD
Serious injury or death may occur
from inhaling burner exhaust or
dangerous vapors.
Installation of this unit including the
ventilation of the combustion gases must
comply with all local, state and national
codes. (Standards to be followed include
the National Fuel Gas Code ANSI Z223.1/
NFPA No. 54. In Canada; Refer to the CSA
B149.1 Gas Installation Code).
Always make certain there is adequate
ventilation (fresh outside air) for breathing
and combustion. This will prevent the
buildup of dangerous carbon monoxide
gases. Beware of poorly ventilated areas,
or areas with exhaust fans which can
cause poor air exchange.
Follow all safety instructions provided with
the materials you are spraying. Use of a
respirator may be required when working
with some materials. Do not use this
heater module to dispense hazardous
materials.
RISK OF ASPHYXIATION
SAFETY WARNINGS
READ ALL SAFETY WARNINGS BEFORE INSTALLING AND USING HEATER MODULE

6 HOM-SERIES Hot Water Heater module Operator's Manual
POTENTIAL CONSEQUENCE PREVENTION
HAZARD
RISK OF
ELECTROCUTION
OR
ELECTRIC SHOCK
Serious injury or death could
occur if the heater module is not
properly grounded. Your heater
module is powered by electricity
and may cause electric shock or
electrocution if not used properly.
Installation of this unit including all
electrical connections must comply
with all local, state and national codes.
(Standards to be followed include NFPA
No. 70/NEC National Electrical Code.
In Canada; Refer to the CSA C22.1
Canadian Electrical Code Part 1)
This unit must be connected to a
grounded, permanent wiring system; or
an equipment-grounding conductor must
be run with the circuit conductors and
connected to the equipment-grounding
lead on the unit.
Make sure the heater module is
connected to a properly grounded source
which provides correct voltage and
adequate fuse protection. Disconnect
from power source when not in use or
when making repairs.
Never operate heater module with
electrical enclosures open, removed or
damaged.
Do not touch machine while standing in
water or with wet hands. Never let the
electrical supply or any connections lay
in the water.
DO NOT direct spray on or into electrical
installations of any kind! This includes
electrical outlets, light bulbs, fuse boxes,
transformers, the unit itself, etc.
DO NOT allow metal components of the
heater module to come in contact with
live electrical components.
Any electrical wiring or repairs performed
on this heater module should be done
by authorized service personnel in
accordance with local and national
electrical codes.
Before opening any electrical enclosure,
always shut off the heater module, relieve
pressure and disconnect the heater
module from the power source. Allow
heater module to cool down. Never
assume the heater module is safe to work
on just because it is not operating. It
could restart at any time!
Electrical shock may occur if heater
module is not operated properly.
Serious injury or death may occur
from contact with electricity.
Serious injury or death may occur if
electrical repairs are attempted by
unqualied persons.
Serious injury or death could result
from improper installation.
SAFETY WARNINGS
READ ALL SAFETY WARNINGS BEFORE INSTALLING AND USING HEATER MODULE

HOM-SERIES Hot Water Heater module Operator's Manual 7
Serious injury or death could
occur from high pressure spray
penetrating the skin.
Keep clear of nozzle and spray! Never put
your hand, ngers or body directly over the
spray nozzle.
Never point the high pressure discharge
stream at persons.
This equipment is to be used only by
trained operators.
Always keep operating area clear of all
persons.
To reduce the risk of injury, close
supervision is necessary when using this
equipment near children. DO NOT allow
children to operate this unit.
SEEK EMERGENCY MEDICAL CARE if
the spray appears to have penetrated the
skin! DO NOT TREAT AS A SIMPLE CUT!
Be prepared to tell a physician exactly what
kind of cleaning agents you were using
by reading the Material Safety Data Sheet
(MSDS) provided with your detergent.
High pressure hoses should be inspected
daily for signs of wear. If evidence of
failure exists, promptly replace all suspect
hoses to prevent the possibility of injury
from the high pressure spray. If a hose or
tting is leaking, NEVER PLACE YOUR
HAND DIRECTLY ON THE LEAK.
Before using heater module, or when quick
connecting high pressure hoses and spray
nozzles, be certain the "collar" on the
female quick connect is locked securely to
prevent accidental discharge and that all
quick coupler ttings are secure.
NEVER operate the gun with the trigger
wired in the open position. To prevent
accidental discharge, the trigger gun
should be securely locked when not in use.
Before removing the spray nozzle or
servicing the unit, ALWAYS shut off the
unit and trigger the gun to release trapped
pressure. (Even after you shut off the
unit, there is high pressure water left in the
pump, hose and gun until you release it by
triggering the gun.)
POTENTIAL CONSEQUENCE PREVENTION
HAZARD
SAFETY WARNINGS
READ ALL SAFETY WARNINGS BEFORE INSTALLING AND USING HEATER MODULE
RISK OF INJECTION
OR
SEVERE CUTTING INJURY

8 HOM-SERIES Hot Water Heater module Operator's Manual
RISK OF BURNS
RISK OF BURSTING
RISK FROM MOVING PARTS
Serious injury may occur from
touching the heat exchanger or
vent piping. These areas can
remain hot for some time after the
heater module is shutdown.
Never exceed manufacturers maximum
allowable pressure rating of attachments.
Do not allow any hoses to make contact
with the heat exchanger to prevent the
possibility of bursting. Avoid dragging the
hoses over abrasive surfaces such as
cement.
Use only manufacturer recommended
repair parts for your heater module.
In freezing temperatures, the unit must
always be warm enough to ensure there
is no ice formation in the unit. Do not
start the heater module without rst
allowing the unit to thaw.
Never allow any part of your body to
contact the heat exchanger or the vent
piping.
POTENTIAL CONSEQUENCE PREVENTION
HAZARD
Serious injury may occur to the
operator from moving parts on the
heater module.
Do not operate the unit without all
protective covers in place or make any
adjustments without shutting off the
heater module, relieving pressure and
disconnecting the heater module from
the power source. Allow heater module
to cool down. Never assume the heater
module is safe to work on just because
it is not operating. It could restart at any
time!
Serious injury may occur from a
heater module malfunction or
exploding accessories if in-
correct system components,
attachments or accessories are
used.
Serious injury or death may occur if
attempting to start the heater mod-
ule when the unit is frozen.
SAFETY WARNINGS
READ ALL SAFETY WARNINGS BEFORE INSTALLING AND USING HEATER MODULE

HOM-SERIES Hot Water Heater module Operator's Manual 9
RISK OF BODILY INJURY
Serious injury or death may occur
from detergents contacting or
penetrating the skin.
SEEK EMERGENCY MEDICAL CARE if
the spray appears to have penetrated the
skin! DO NOT TREAT AS A SIMPLE CUT!
Be prepared to tell a physician exactly what
kind of cleaning agents you were using
by reading the Material Safety Data Sheet
(MSDS) provided with your detergent.
Never use any solvents or highly corrosive
detergents or acid type cleaners with this
heater module.
Protective equipment such as rubber suits,
gloves and respirators are advisable,
especially when using cleaning detergents.
Keep all detergents out of the reach of
children!
ALWAYS wear protective goggles when
operating the unit to shield the eyes from
ying debris and detergents.
DO NOT direct spray toward fragile
materials such as glass for shattering could
occur.
Stay alert-watch what you are doing. Do
not operate the unit when fatigued or under
the inuence of alcohol or drugs.
NEVER squeeze the trigger unless
securely braced.
DO NOT overreach or stand on unstable
support.
Wet surfaces can be slippery, wear
protective foot gear and keep good footing
and balance at all times.
NEVER trigger the gun while on a ladder
or roof.
ALWAYS hold on rmly to the gun/lance
assembly when starting and operating the
unit. Failure to do so can cause the lance
to fall and whip dangerously.
Know how to stop the heater module and
bleed pressures quickly. Be thoroughly
familiar with controls.
DO NOT leave pressurized unit
unattended. Shut off the heater module
and release trapped pressure before
leaving.
DO NOT operate the unit if you see any
oil or water leaks from the machine. DO
NOT resume operation until the unit has
been inspected and repaired by a qualied
serviceman.
Never make adjustments on the machine
while in operation.
Before servicing the unit: shut off the
heater module, relieve pressure and
disconnect the heater module from the
power source. Allow heater module to cool
down. Never assume the heater module
is safe to work on just because it is not
operating. It could restart at any time!
POTENTIAL CONSEQUENCE PREVENTION
HAZARD
Serious injury can occur from
loose debris being propelled at a
high speed from the spray gun.
Injury may occur if the operator
loses his balance caused by the
thrust of water traveling through
the spray nozzle.
Injury may occur from the heater
module.
SAFETY WARNINGS
READ ALL SAFETY WARNINGS BEFORE INSTALLING AND USING HEATER MODULE
SAVE THESE INSTRUCTIONS

10 HOM-SERIES Hot Water Heater module Operator's Manual
1. This unit should be installed indoors by a qualied serviceman in a non-
freezing, dry environment away from damaging winds and rain. If any part of
the unit becomes frozen, excessive pressure may build up in the unit which
could cause it to burst resulting in possible serious injury to the operator or
bystanders. Normal precautions should be taken so that excess moisture
does not reach the electrical controls or the power unit.
2. It should be placed in an area away from ammable or combustible material.
These types of material should be kept at least 20 feet away from the
unit.
3. Avoid small areas and exhaust fans. Combustion becomes difcult and
carbonmonoxidemayresultintheseareas. Allowenoughspaceforservicing.
Some codes will require certain distances from walls and ooring. Two feet
away from the walls should sufce.
4. This unit should only be placed on a level surface. NEVER spray water
directly on the unit.
5. DO NOT place unit in an area:
a. where ammable gas vapors may be present.
b. with insufcient ventilation.
c. where there is evidence of oil or fuel leaks.
RISK OF EXPLOSION OR FIRE!
DO NOT PLACE UNIT IN AN
AREA WHERE FLAMMABLE
GASVAPORSMAYBEPRESENT.
A SPARK COULD CAUSE AN
EXPLOSION OR FIRE!
RISK OF UNIT BURSTING!
DO NOT LOCATE THE UNIT IN
FREEZING ENVIRONMENTS!
RISK OF ASPHYXIATION!
USE THIS PRODUCT ONLY IN
WELLVENTILATEDAREAS! THE
EXHAUST CONTAINS CARBON
MONOXIDE, A POISONOUS,
ODORLESS AND INVISIBLE
GAS. BREATHING THIS GAS
CAN CAUSE SERIOUS INJURY,
ILLNESS & POSSIBLE DEATH.
INSTALLATION
ELECTRICAL:
1. Installation of this unit should be performed by a qualied serviceman and
all electrical installation must conform to all local, state and national codes,
including NFPA No. 70 (NEC) National Electrical Code. In Canada; Refer
to the CSA C22.1 Canadian Electrical Code Part 1.
2. Ensure electrical supply is identical to the specications listed on the heater
module data plate.
3. Ensure all connections are secure and covers are replaced.
LOCATION AND PLACEMENT:
RISK OF ELECTROCUTION!
THISUNITMUSTBECONNECTED
TO A PROPERLY GROUNDED
OUTLET.
DANGER
WARNING
WARNING

HOM-SERIES Hot Water Heater module Operator's Manual 11
INSTALLATION
VENTILATION:
1. Installationofthisunit inan indooror in anenclosed area shouldbe performed
by a qualied serviceman and all venting must conform to all local, state and
national codes, including the National Fuel Gas Code ANSI Z223.1/NFPA
No. 54. In Canada; Refer to the CSA B149.1 Gas Installation Code. The
burner exhaust should be stacked to the outside atmosphere and a draft
diverter should be installed as well.
NOTE: There should be no more than 6500 BTU per square inch of ue.
2. A draft diverter must be installed above the exhaust outlet. This diverter
breaks the chimney effect and enhances the draft through the burner for a
more efcient ame. It also helps prevent cold air down drafts from freezing
the heat exchanger.
3. Install the recommended ue pipe per local, state and national codes,
including the National Fuel Gas CodeANSI Z223.1/NFPANo. 54. In Canada;
Refer to the CSA B149.1 Gas Installation Code. If the ue pipe exceeds 10
feet in length or contains more than two elbows, the natural draft may be
eliminated and the burner will not ignite. DO NOT install a movable ue
pipe damper.
4. If the unit is being installed in an enclosed room, provide adequate air for
combustion by installing openings to the room near the ceiling for ventilation
and near the oor for burner combustion. These openings should be sized
using one square inch for each 1000 BTU per inch of the machine.
Example: A heater module with a 400,000 BTU input requires openings of 400
square inch or approximately 3 feet x 1 foot.
5. If the building in which the unit is being installed seems unusually tightly
constructed, it is recommended that air intakes extending to the outside of the
building be employed to supply combustion air. End the intakes outside the
building with a downward opening to protect these intakes from snow and/or
rain. Include a mesh screen no smaller than 1/4" over the opening.
DRAFT DIVERTER
ENCLOSED ROOM VENTILATION

12 HOM-SERIES Hot Water Heater module Operator's Manual
INSTALLATION
WATER SUPPLY:
1. Using the quick connect at the inlet of the unit, connect the water supply
to the unit. For best results, the input to the unit should be 3-6 GPM.
NOTE: Incoming water pressure must not exceed 3500 PSI.
2. Connect the discharge hose provided to the outlet of the unit.
3. Connect gun/wand/lance assembly to the discharge hose.
4. Make sure all connections are secured before start-up.
HIGH PRESSURE HOSE CONNECTION
QUICK CONNECT
HOSE CONNECTION
HIGH PRESSURE CONNECTION:
Connect the high pressure discharge hose by connecting one end to the
heater module and the other end to the gun assembly. Make certain the
quick connects are securely locked together.

HOM-SERIES Hot Water Heater module Operator's Manual 13
INSTALLATION
QUESTIONS
CODES:
1. Does the electrical supply meet respected codes?
2. Does the ventilation system meet respected codes?
LOCATION:
1. Is the unit installed indoors on a level surface in a dry area
protected from excessive wind, rain and moisture?
2. Is the unit located away from ammable and combustible
material?
3. Is the unit located in a large enough area for adequate air ow?
ELECTRICAL:
1. Is the unit properly grounded?
2. Do all electrical components used meet requirements shown
on the unit I.D. Plate and is the voltage correct?
VENTILATION:
1. Are the correct ue pipe and draft hood sizes employed?
2. Is there adequate ventilation for burner combustion?
3. Is the unit properly vented to allow adequate air ow?
4. Is exhaust stacked to outside atmosphere?
GENERAL:
1. Have all operators using this unit read the Installation and
Operator's Manual and understood all safety warnings?
2. Has the unit been installed by qualied service people who
followed the Installation and Operator's Manual instructions?
3. Is there ample water supply?
YES NO
PRE-OPERATION CHECKLIST:
Before starting the unit, answer the questions in this checklist:
IF NO WAS MARKED FOR ANY OF THESE QUESTIONS, CORRECT THE SITUATION BEFORE
OPERATING THIS UNIT.

14 HOM-SERIES Hot Water Heater module Operator's Manual
1. Before starting the unit, perform the following procedures:
a. Check all hose connections to ensure they are securely tightened.
b. Inspect for system water and oil leaks.
c. Check to ensure the voltage is on.
d. Inspect high pressure hoses for kinking, cuts and leaks. If a cut or leak
is found, DO NOT USE HOSE! Replace hose before starting unit. See
"Risk of Injection" warnings, pg. 7. Be sure that all damaged parts are
replaced and that the mechanical problems are corrected prior to opera-
tion of the unit. If you require service, contact your Customer Service
Representative.
PRE-START INSPECTION PROCEDURES:
PREPARATION
ATTIRE:
Proper attire is essential to your safety. It is advised to utilize whatever means
necessary to protect eyes, ears, and skin. Additional safety attire (such as
respiratory mask) may be required when using detergent cleaning agents with
this heater module.

HOM-SERIES Hot Water Heater module Operator's Manual 15
WARNING
THE FOLLOWING PAGES CONTAIN OPERATING AND
MAINTENANCE INSTRUCTIONS.
DO NOT ATTEMPT TO OPERATE THIS HEATER MODULE
UNTIL YOU HAVE READ AND UNDERSTOOD ALL
SAFETY PRECAUTIONS AND INSTRUCTIONS
LISTED IN THIS MANUAL. FOLLOW THE MAINTENANCE
INSTRUCTIONS SPECIFIED IN THE MANUAL.
INCORRECT OPERATION OF THIS UNIT CAN CAUSE
SERIOUS INJURY!!
DO NOT ALTER OR MODIFY THIS EQUIPMENT
IN ANY MANNER!

16 HOM-SERIES Hot Water Heater module Operator's Manual
SHUTDOWN:
1. If the burner switch is still on, turn it off.
2. Squeeze the trigger and discharge the water for a period of three minutes
to cool the heat exchanger and high pressure hose. (Insufcient cool down
period of the high pressure hose will cause excessive wear and eventual
rupturing of the hose.)
3. Turn off the water supply to the heater module.
4. Trigger the gun momentarily to relieve trapped pressure.
RISK OF BURN!
THE WATER TEMPERATURE
COULD BECOME VERY
HOT DURING HOT WATER
OPERATION. BE CAUTIOUS
WHEN ADJUSTING PRESSURE
ORCONTROLLINGTHETRIGGER
GUN/LANCE ASSEMBLY.
WHEN COLD WATER IS BEING
PUMPED INTO THE HEAT
EXCHANGER AND THE BURNER
ISON,CONDENSATIONMAYFORM
ON THE COIL AND DRIP. THIS
WILLGIVETHEAPPEARANCEOF
A LEAKING COIL PARTICULARLY
IN COLD HUMID WEATHER.
IMPORTANT
WARNING
OPERATING INSTRUCTIONS
Once your unit has been installed by a qualied serviceman and you have
completed the PRE-OPERATION CHECKLIST on pg. 13, you are ready for
operation. The following steps will help you operate your machine safely.
FLUSHING THE SYSTEM:
1. This unit has a steel coil which, after setting, will cause the water remaining
in the coil from the previous usage to turn brown or black. This water must
be ushed from the system before start-up. This procedure should be
performed without a gun and lance installed.
a. Attach garden hose to machine.
b. Turn on water supply.
c. Run the water for 3-5 minutes.
d. Turn off water supply when clear water is discharged from coil.
HOT WATER OPERATION:
1. Push in the burner switch to turn on the burner. On initial start-up, water
will begin turning hot in approximately 60 seconds and will reach maximum
temperature in approximately 3 minutes, provided the trigger remains
squeezed. The burner will stop ring when the trigger is released.
2. Set thermostat to the desired setting.
At this point, the unit is operating as a hot water heater module. Be certain to
be extremely cautious when adjusting the pressure and controlling the trigger
gun/lance assembly to avoid the possibility of burns.
RISK OF UNIT DAMAGE!
BE CERTAIN THE GUN &
LANCE ASSEMBLY ARE
NOT CONNECTED TO THE
UNIT WHILE FLUSHING THE
SYSTEM. FLUSHING ALLOWS
MINERAL DEPOSITS TO BE
RELEASED FROM THE SYSTEM
WHICH WOULD OBSTRUCT
OR DAMAGE THE GUN AND
NOZZLEASSEMBLYRESULTING
IN COSTLY REPAIRS.
CAUTION

HOM-SERIES Hot Water Heater module Operator's Manual 17
PREVENTIVE MAINTENANCE:
LEAKS: Promptly eliminate any leaks found in the pumping system by
removing suspect parts, applying thread sealant to the threads and
reinstalling.
NOTE: If using teon tape, be certain no tape gets inside any plumbing to
prevent the possibility of a plugged spray nozzle.
QUICK COUPLERS: There are o-ring seals inside the couplers which will
deteriorate. To replace, simply install a replacement o-ring to correct
the leak. (Additional o-rings can be purchased from your dealer.)
NOZZLE: Water ow through the spray nozzle will erode the orice,
making it larger, resulting in a pressure loss. Nozzles should be
replaced whenever pressure is less than 85% of the maximum. The
frequency of replacement will depend upon such variables as mineral
content in the water and number of hours the nozzle is used.
MAINTENANCE
32˚F 0˚C
WINTERIZING:
For storage and transportation purposes in subfreezing ambient temperatures,
it will be necessary to winterize this unit. This unit must be protected to the
lowest incurred temperature for the following reasons:
1. If any part of the water handling system becomes frozen;
excessive pressure may build up in the unit which could cause the
unit to burst resulting in possible serious injury to the operator or
bystanders.
2. The water handling system in this unit may be permanently
damaged if frozen. FREEZE DAMAGE IS NOT COVERED BY
WARRANTY.
If you must store your unit in an area where the temperature may fall below
32°F, you can protect your unit by following the procedure outlined below.
AIR BLOW OUT:
1. Remove the nozzle from the wand assembly. Squeeze the trigger
until water ceases to exit the wand assembly.
2. Connect an air tting from an air hose to the heater module inlet.
3. Run compressed air into the system to remove all water from the
system.
RISK OF UNIT BURSTING.
DO NOT STORE / OPERATE
U N I T I N A F R E E Z I N G
ENVIRONMENT!
WARNING
QUICK COUPLERS
PREVENTIVE OPERATOR MAINTENANCE CHART
DEALER MAINTENANCE CHART
PROCEDURE DAILY
Fuel inspection X
Water leak inspection X
Quick-connect and hose inspection X
PROCEDURE 12 MONTHS
Inspect fuel pump internal lter X
Check burner electrodes X
Burner inspection X
Exhaust ventilation inspection X
*Descale coil X
*Scale buildup will vary with mineral content in the water and amount off us-
age. Descaling can range from monthly to yearly maintenance.

18 HOM-SERIES Hot Water Heater module Operator's Manual
MAINTENANCE
FUEL FILTER/WATER SEPARATOR:
Inspect bowl on fuel lter/water separator for water accumulation. If water exists,
unscrew drain valve on bowl to drain water, then close.
BURNER AIR ADJUSTMENT:
The air shutter has been factory preset for proper operation between sea level
and 2000 feet elevation at standard conditions (60°F ambient water and air tem-
peratures). In colder temperatures or higher altitudes, it may be necessary to
adjust the air supply to the combustion chamber. This adjustment will maximize
burner efciency and avoid inefcient operation or excessive sooting of the heat
exchanger coil. A smoke spot test is recommended during any air shutter and
band adjustment. If you do not have the equipment to perform a smoke spot
test, follow the procedures listed below.
1. The machine must be running and the burner ON.
2. Loosen the Locking Screw (#3) on the shutter.
3. Check for smoke from the heat exchanger exhaust. If smoke is
not present, slowly close the Air Shutter (#1) by moving the dial
counterclockwise to a lower number. Continue moving the dial until
smoke appears.
4. Record this setting.
5. Open Air Shutter (#1) two increments. Example: If Air Shutter was
set at 2, move it to 4.
6. Slowly trigger the gun on and off. This will cause the burner to turn
on and off. Look for a smoke puff when the burner ignites.
7. Repeat steps 5 and 6 until a smoke puff is noticed. Record the Air
Shutter Setting.
8. The difference between the recorded settings in steps 4 and 7 is the
combustion window. Set the dial 1/2 way between these settings.
NOTE: If you are unable to detect a setting on either step 3 or 7, more or less
air may be needed to achieve a proper combustion window. Loosen the
Bolt (#4 at left) and open the Air Band (#2) in 1/4" increments. Repeat
steps 3-8 until proper combustion window is achieved.
BURNER AIR ADJUSTMENT

HOM-SERIES Hot Water Heater module Operator's Manual 19
SYMPTOM PROBABLE CAUSE REMEDY
TROUBLESHOOTING
Water is leaking under heat Condensation. May occur in cool, humid conditions.
exchanger coil.
Ruptured heat exchanger coil. Replace.
Burner will not ignite Switch is defective. Check switch position or replace.
Adjustable Thermostat is defective Check switch position or replace.
or in the "Off" position.
No voltage. Contact Customer Service.
Out of fuel. Refuel.
Fuel tank inlet tube screen obstructed. Remove, clean or replace tube.
Trigger gun is closed. Open trigger gun for pressure.
Fuel pickup screen is obstructed. Remove, clean or replace.
Temperature above thermostat Unit will automatically reignite when
setting. cool.
Flexible coupler broken. Replace.
Dirty or clogged fuel lter. Drain or replace as necessary.
Fuel pump sucking air. Tighten all fuel intake connections.
Eliminate leaks in intake line.
Fuel pump inoperative. Check pressure, replace if needed.
(Pressure should be checked by an
authorized service technician.)
Dirty or clogged fuel nozzle. Replace.
Improper burner air adjustment. Adjust as explained on page 18.
Ignition transformer failure. Replace.
Ignition electrodes not set properly, Contact Customer Service.
damaged or worn.
Fuel solenoid valve failure. Replace.
High PSI mode. Verify burner switch is in the
"ON" position.

20 HOM-SERIES Hot Water Heater module Operator's Manual
Burner motor will not run. Switch is defective position. Check switch position or replace.
No voltage. Contact Customer Service.
Motor overload. Reset when cool.
Fuel pump seized. Allow motor to cool. Repair or
replace.
Burner runs erratically. Water in the fuel oil. Drain fuel lter/water separator.
Drain fuel tank, and replace with
clean fuel.
Dirty fuel lter/water separator. Replace element.
Fuel pickup screen is obstructed. Contact Customer Service.
Dirty fuel nozzle. Replace.
Improper air adjustment setting. Adjust as explained on page 18.
Fuel pump malfunctioning. Replace.
Burner runs, but will not heat. Low fuel pump pressure. Check fuel pump pressure, adjust or
replace if needed. (Pressure should
be checked by an authorized
service technician.)
Dirty fuel nozzle. Replace.
Improper air adjustment setting. Adjust as explained on page 18.
Burner discharges white smoke. Low on fuel. Refuel. If white smoke persists,
contact Customer Service.
Low fuel pressure. Check fuel pump pressure, adjust or
replace if needed. (Pressure should
be checked by an authorized
service technician.)
Fuel pickup screen is obstructed. Contact Customer Service.
Dirty fuel nozzle. Replace.
Improper air adjustment setting. Adjust as explained on page 18.
Cold combustion chamber start-up. Run burner for several minutes.
Excessive air supply. Adjust as explained on page18.
Burner discharges black smoke. Insufcient air supply. Adjust as explained on page 18.
Fuel nozzle orice is too large. Replace with correct nozzle.
Fuel pressure is too high. Contact Customer Service.
Combustion chamber loaded with Contact Customer Service.
unburned fuel.
SYMPTOM PROBABLE CAUSE REMEDY
TROUBLESHOOTING