Modine Manufacturing HD User manual

t DIJVE
February, 2003
RESIDENTIAL OWNER'S MANUAL
gas-fired unitheaters
model HD
Low Profile, Gas-Fired Residential Heater
All models approved for use in California by the CEC,
in New York by the MEA division, and in Massachusetts.
Unit heater is certified for residential and commercial
applications.
Improper installation,adjustment, alteration,
service or maintenance can cause property
damage, injuryor death, and could cause
exposure to substances which have been
determined by various state agencies to
cause cancer, birth defects or other
reproductive harm.
If the information in this manual is not
followed exactly, afire or explosion may
result, causing property damage, personal
injuryor death.
To prevent premature heat exchanger failure
do not locate ANY gas-fired units in areas
where chlorinated, halogenated or acid
vapors are present in the atmosphere.
All installationand service of these units MUST
be performed by a qualified installationand
service agency.
The use and storage of gasoline or other
flammable vapors and liquidsin open
containers in the vicinity of this appliance is
hazardous.
WHAT TO DO IF YOU SMELL GAS:
•Open windows.
• Do nottry to lightany appliance.
•Do nottouch any electrical switch;do not
use any phone in your building.
•Immediately cell your gas supplier from a
neighbor's phone. Follow the gas supplier's
instructions.
•If you cannot reach your gas supplier, call
your fire department.
THIS MANUAL IS THE PROPERTY OF THE OWNER,
PLEASE BE SURE TO LEAVE IT WITH THE OWNER WHEN YOU LEAVE THE JOB.

All installationand service of these units
MUST be performed by a qualified installation
and service agency.
INTRODUCTION AND GENERAL COMMENTS GENERAL OPERATIONAL INFORMATION
Congratulations on Your New Purchase
Thank you for choosing Modine's low profile, tubular "Hot
Dawg" unit heater. We are convinced that you will be pleased
with the design and quality of this heater. You should receive
years of trouble-free heat and comfort from the Hot Dawg with
proper maintenance and care.
Enclosed is an additional sales brochure for you to pass on to
a friend. Thank you again for placing your trust in Modine.
Keep the heater area dear:
1. Do not use the area around the heater for storage.
2. Never obstruct the air openings into the heater.
3. Never place any items (paper, tcols, etc.) on top of the
heater. There are air openings on the top of the heater.
4. Do not place any combustible materials (paper, wood, cloth,
etc.) next to the heater or vent.
Supply Air:
1. Makecertainthatthefan guard inthe rear oftheheateris
unobstructed.
2. For optimum performance, do not completely close the
deflector blades. If needed, adjust the deflector blades
slightly to direct the air towards the ground.
3. When initially started in acold environment, the air coming
out of the heater may not feel warm. As the temperature in
the environment increases, and as the heat exchanger
tubes become hot, the air temperature coming out of the
heater will increase.
Combustion Air."
This gas-fired unit heater must be supplied with adequate
combustion air. Today's current construction techniques, which
result in tighter homes and buildings (or significantly less air
infiltration from the outside), makes it more important than
ever that heating equipment have adequate combustion air.
The installer of this unit heater has determined what it takes to
be assured that your unit heater has adequate combustion air.
if this heater has been installed in a confined space, two
permanent openings (one near the top of the enclosure and
one near the bottom) have been provided. These two
openings must freely communicate with areas having
adequate combustion infiltration from the outside. Do not
block or alter in any way the combustion air openings.
It is very important to abide by the following:
1. Do not block or alter in any way the combustion air
openings.
2. Refrain from creating excessive amounts of dust near the
heater (i.e. saw dust from sanding, cutting, etc.)
3. Do not use or store corrosive chemicals in the area near
the heater (these include pool chlorine, fertilizers, etc.)
4. Refrain from prolonged use of ventilation fans or hoods as
this may deplete the amount of combustion air.
Start Up - General
Beforestartup,itisimportanttoreadthe"ForYourSafetyRead
BeforeOperating"messagebelow. Thismessagealsoappears
on the access cover of your HD gas-firadunit heater. The
messagefollows:
FOR YOUR SAFETY READ BEFORE OPERATING
WARNING: If you do not follow these instructions exactly, a
fire or explosion may result causing property damage,
personal injury or death.
A. This appliance does not have a pilot flame. It is equipped
with an ignition device which automatically lights the
burner.
B. BEFORE OPERATING smell all around the appliance area
for gas. Be sure to smell next to the floor because some
gas is heavier than air and will settle on the floor.
WHAT TO DO IF YOU SMELL GAS:
Do not try to light any appliance.
Do not touch any electric switch; do not use any
phone in your building
Immediately call your gas supplier from a
neighbors phone. Follow the gas supplier's
instructions.
If you cannot reach your gas supplier, call the fire
department.
C. Use your hand to move the gas control switch. Never use
tools. Ifthe switch will not move, don't try to repair it; call a
qualified technician. Force or attempted repair may result
in a fire or explosion.
D. Do not use this appliance if any part has been under water.
Immediately call a qualified service technician to inspect
the appliance and replace any part of the control system
and any gas control which has been under water.
The control operating sequence of your gas-fired unit heater is
as follows:
Upon a call for heat from the thermostat, power is supplied
to the power exhaust motor.
The unit will go through apre-purge period and then the
hot surface ignitor will be energized.
After the ignitor becomes hot, the main valve in the control
will open to allow gas flow to the burners.
if the fan motor has not already started, it will start shortly.
If a burner flame is not sensed for any reason, the main
valve will close and there will be a short purge period
before ignition is tried again.
If the flame is not sensed after four tries there will be at
least a one hour wait before ignition is tried again.
Shut Down - General:
TO TURN OFF GAS TO APPLIANCE
1. Set thermostat to lowest setting.
2. Turn manual shut-off valve located outside of the unit to the
closed position (see Figure 1).
3. Turn off all electric power to the appliance if service is to be
performed.
4. Remove access panel.
5. Turn the gas valve switch to the "OFF" position.
6. Replace the access panel.

All installationand service of these units
MUST be performed by a qualified installation
and service agency.
TROUBLESHOOTING INFORMATION MAINTENANCE
General
There are a few troubleshooting items that you may perform.
They are listed below. All other troubleshooting MUST BE
PERFORMED BY A QUALIFIED INSTALLATION AND
SERVICE AGENCY
If the heater does not light .....
1. Make sure the thermostat is set above room temperature.
2. Make sure there is power to the heater (check the circuit
breaker).
3. Make sure the main gas supply is on (check the manual
shut-off valve outside the unit and make sure it is in the
open position - see Figure 1).
4. If none of the above solve the problem, contact a qualified
installation and service agency.
Air feels cold coming out of the heater .....
1. Make sure the burner lit. (If it didn't, refer to "If heater does
not light" above)
2. If the room WAS cold, it will take a while for the air coming
out of the heater to feel warm.
3. If the air coming out of the heater continues to feel cold
after 5 minutes and the room is not warming up, contact a
qualified installation and service agency.
Itis recommendedthat a qualifiedinstallal_onand service
agency inspectthe heater and vent systempriorto each
heatingseason.
There are no components behind the service access door that
are serviceable by the homeowner, however,there are a few
checks that you can do:
(REMEMBER TO ALWAYS TURN OFF THE POWER AND
SETTHERMOSTAT TO THE LOWESTSETTING BEFORE
PERFORMING ANY MAINTENANCETO THE HEATER)
1. Periodically dust and clean the heater.
2. Periodically remove the dust from the fan blades.
3. Remove the deflector blades and vacuum inside the heat
exchanger area.
4. The motors on the heater (power exhaust and fan) do NOT
require oiling. They are permanently lubricated at the
factory. DO NOT attempt to oil the motors.
Figure 1
Recommended Piping to Controls
GAS
SUPPLY LINE
iii
i i
i i
i i
i i
i , i
GAS , ,
SUPPLY LINE_
_ -FT
GROUND
JOINT
UNION
W/BRASS
MANUAL GAS SEAT
_ToSHUT_OFF VALVE
/ CONTROLS
PLUGGED
1/8" NPT TEST
GAGE CONNECTION
SEDIMENT
TRAP
•Manual shut-off valve is in"off" position when perpendicular to pipe.

MODINE MANUFACTURING COMPANY
LIMITED WARRANTY
(Residential Use Only)
WHAT THIS WARRANTY COVERS
This warranty covers all defects in material and workmanship in
your Modine unit heater, when used for your home or garage.
WHAT THIS WARRANTY DOES NOT COVER
Unit heater, or any of its parts:
1. which have been improperly installed or removed.
2. which have been damaged other than by normal use.
3. which have not been properly maintained.
4. which have been exposed to gas input more than 5% higher
than specified on the serial plate of the unit heater, resulting in
over-firing of the heater.
5. which have been exposed to possibly corrosive chemicals of
chemical vapors (such as found in swimming pools), or
potentially explosive or flammable atmospheres laden with
grain dust, sawdust, or similar air-borne materials.
6. where any defect has been caused by abuse, misuse, neglect,
carelessness, or accident.
7. where the serial number of the unit heater has been altered,
defaced, or removed.
8. which are used in a confined space without adequate
combustion air, such as can be found in more air4ight
construction.
WHO THIS WARRANTY COVERS
This warranty covers the purchaser of the unit heater or anyone
else who owns it during the warranty period.
HOW LONG THE WARRANTY LASTS
1. The warranty for the heat exchanger of the unit heater remains
in force for ten years from the date you purchased the unit
heater.
2. The warranty on all other parts of the heater remains in force
for two years from the date you purchased the unit heater.
WHAT MODINE WILL DO TO CORRECT ANY WARRANTY
DEFECTS, AND HOWYOU CAN GET WARRANTY SERVICE
In the event of a warranty failure, Modine will provide replacement
parts at Modine's cost. To obtain warranty repairs or replacement
of defective parts, you must, within the period of warranty
coverage, contact the agency from whom you purchased the unit
heater. That seller, or the service agency performing service for
the seller, will determine whether or not the unit heater, or any of
its parts, is in fact defective, and will then either repair or obtain
and install the necessary replacement parts for you. If it is
determined that the unit heater or parts were not defective, you
may be charged for any replacement parts.
CAUTION - Do not attempt to repair the unit heater yourself, nor
remove it or any of its parts. This must be done by a qualified
service agency.
If you have any questions about this warranty, call the person from
whom you purchased the unit heater; or a Modine Heating
Products Representative at 1-800-828-4328.
WHAT MODINE WILL NOT DO
Modine will not reimburse you for any labor costs or service
charges related to warranty repairs or replacements.
INCIDENTAL AND CONSEQUENTIAL DAMAGES DISCLAIMED
This warranty does not cover incidental damages, such as use of
substitute heating equipment, or other costs arising from the loss
of use of the unit heater. This warranty also does not cover
consequential damages, such as the cost of repairing or replacing
other property which is damaged when this unit heater does not
work properly,
HOW STATE LAW RELATES TO THIS WARRANTY
Some states do not allow the exclusion or limitation of incidental or
consequential damages so the above limitations or exclusions may
not apply to you.
This warranty gives you specific legal rights, and you may also
have other rights which vary from state to state.
@ Modine Manufacturing Company 2003
CommercialHVAC&R Division
Modine Manufacturing Company
1221 Magnolia Avenue
Buena Vista, Virginia 24416
Phone: [phone] (HEAT)
Fax: [phone] (Service & Parts)
www.modine.com
10/03- ?M Lithe in USA