Coleman DGAH077BBSA, DGAH056BBSA, DGAA090BDTA, DGAA077BDTA, DGAA070BDTA Owner’s Manual

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OWNER'S MANUAL

SEALED COMBUSTION

DOWNFLOW

GAS FURNACE

WARNING

FOR YOUR SAFETY - Do not store or use gasoline or other flammable vapors and liquids in the vicinity of this or any other appliance.

improper installation, adjustment, alteration, service or maintenance can cause property damage, personal injury or loss of life. Installation and service must be

performed by a qualified installer, service agency or the gas supplier. Do not

store or use gasoline or other flammable vapors and liquids in the vicinity of this or any other appliance.

Never attempt to modify this furnace. Fire, explosion, or asphyxiation may result. If malfunction occurs, obtain the assistance of a qualified service agent.

If not installed, operated, and maintained in accordance with the manufacturer's

instructions, this product could expose you to substances in fuel or from fuel combustion which are known to the State of California to cause cancer, birth defects or other reproductive harm. Also, operation, installation and servicing of

this product could expose you to airborne particles of glasswool fibers known to the State of California to cause cancer through inhalation.

Use of furnace or air conditioning components that are not included in the Inter- tek Testing Services (ETL) certification of this appliance may create a hazard,

will invalidate the certification, and will in many states make installation illegal. UL listed air conditioning components are specified on the furnace label.

I CAUTION'

Before placing furnace in service, itmust be checked to makesure it is equipped for the type of gas being used. Failure to observe this caution may result in unsafe operation, explosion, and/or fire or asphyxiation. Use of other compo- nents not tested in combination with this furnace may make the equipment in

violation of State Codes, may create a hazard, and may ruin the equipment.

035-16329-002 Rev. B (0304)

C onBratuL_tion_...

On your purchase of one of the most versatile furnaces available in the industry today. This compact, energy-efficient furnace

has been precision designed, manufactured of high-quality materials and has passed many rigorous inspections and tests to ensure many years of satisfactory service. This booklet is meant to increase your understanding of your unit, tell you how to

operate it e_ciently and how to obtain the greatest measure of comfort at the lowest operating expense. Please read this book- let thoroughly. We appreciate your interest in our product and your decision to purchase our furnace. Enjoy your comfort.

INTRODUCTION

WARRANTY AND RESPONSIBILITIES

It is the sole responsibilityof the home owner to make certain that

the gas furnace has been correctly

set up and converted to the proper

fuel (Propane or Natural gas) and

adjustedto operate properly.

The manufacturerwarrants the fur-

nace to be free from defects in material or workmanship for the

stated time in the warranty agree- ment (see warranty certificate packedwith the furnace).

However, the manufacturerwill not be responsiblefor any repair costs

to correct problems due to improper set-up, improper installa- tion, furnaceadjustments, improper

operating procedure by the user, etc.

Some specific examples of service calls which cannot be included in

warrantypayments are:

1. Convertingthe furnace to use another type of gas.

2. Correctingfaulty duct work in

the home.

3. Correcting wiring problems in the electricalcircuit tothe fur-

nace.

4. Resetting circuitbreakers or

otherswitches.

5. Adjusting the burner air shut-

ter or service calls madeto cor-

rectproblems caused by improper air adjustment.

6. Correctingproblemscaused by impropergas supplypressure

to the furnace.

7. Instructionaltraining on how to light and operate furnace.

8. Furnace problemscaused by

installationof air conditioner, heat pump, or other airquality

device which is not approved.

9. Problemscaused by improper

installationof the furnace flue assembly (roofjack).

10. Adding a roofjack extension

because of unusualwind con- ditionsor snowconditions.

11. Adjusting or calibrating the

thermostat.

12. Problems caused by construc- tiondebds whichhas fallen into

the flue or combustion air openings.

13. Replacement of fuses.

14. Problems caused by odfice plugged or restricted by spider

webs.

You should establish a firm under- standing of these responsibilities

with your manufactured housing dealer, service company or gas

supplier sothere will be no misun- derstandingat a later time.

GAS SUPPLY The gas supply to your home will

either be Natural Gas or Propane gas. Your furnace will be factory equipped to operate on onlyone of

these two differentgases.

A small metal tag secured to the

fumace next to the gas valve will specify the type of gas your fur-

nace is equippedto use. If the gas is different from that

specified on the metal tag, the fur- nace can be converted byfollowing

the instructions on the furnace

safety label inside lower front panel. Parts for conversion are

containedin the small bag attached to the gas valve. Be sure the

proper size odficeis used, as spec- ifiedon the furnace name plate.

IA CAUTIONj

The furnace must be

converted by a qualified technician. Improper

conversion can cause unsafe operation, explo-

sion, and/or fire or asphyxiation.

Natural Gas Operation

The fumece is designedfor7" W.C.

inletpressure. Pressure is reduced

to 3 1/2" W.C. by the pressurereg-

ulatorin the gas valve. Propane Gas Operation

Inlet pressure to the gas valve must be 11" W.C. When properly

converted to Propane gas, the

pressureis regulated at 10"W.C.

SAFETY INFORMATION For your safety read before light-

ing.

1. The firstlightingof the furnace

after any home setup must be performedby a qualified ser-

vicetechnician.

If this appliance has a pilotthat must be lit by hand, follow

these instructionsexactly.

BEFORE LIGHTING smell all aroundthe furnace for gas. Be

sure to smellnext tothe floor because some gas is heavier

than air and willsettle on the

floor.

2 Unitary Products Group

035-16329-002 Rev. B (0304)

WHAT TO DO IF YOU SMELL

GAS:

DOnot try to lightany appli-

ance.

Do not touch any electric switch and do not use any phone in your building.

Immediately call your gas sup- plier from a neighbor's phone.

Follow the gas supplier's instructions. If you cannot reach your gas supplier, call

the fire department.

4. Use only your hand to move the gas control lever or switch.

Never use tools. If the lever or switch will not move by hand,

don't try to repair it. Call a qual- ifiedservice technician. Force

or attempted repair may result in a fire or explosion.

5. Do not use this furnace if any part has been under water.

Immediately call a qualified

service technician to inspect the furnace and to replace any

part of the controlsystem and any gas controlwhich has

been underwater.

INSTRUCTIONS FOR

STANDING PILOT

MODELS

LIGHTING INSTRUCTIONS

1. STOP! Read the Safety Infor-

mation.

2. Set the thermostat to the low-

est setting.

3. Turn off all electrical powerto

the appliance.

4. Remove the furnace doors.

5. Push in the gas controllever slightlyand move rightto

"OFF". DO NOT FORCE.

6. Wait ten (10) minutes to clear out any gas. Then smell for

gas, including near the floor. If you smell gas, STOP! Follow

Step 3 in the Safety Informa- tion above. If you don't smell

gas, go to the next step.

7. Open hinged observation door, the pilot is found at the end of

the pilot shield on the left side

of the burner.

8. Slightly depress the gas control lever and move itto the left to

the "ON" position and release; then move it to the "PILOT"

position.

9. Move the control lever to "SET" and hold. Immediately light the

pilot with a match (use match holder provided). Continue to

hold the control lever for about one (1) minute after the pilot is

lit. Release the lever and it will spring back to the =PILOT"

position. Pilot should remain lit.

If it goes out, repeat steps 5

through 9 above.

If the lever does not spdng

back when released, stop and immediately call your service

technician or gas supplier.

If the pilot will not stay lit after

several tdes, move the gas control lever to =OFF"and call

your service technician or gas supplier.

10. Move the gas control lever to "ON".

11. Replace the furnace doors.

12. Turn on all electric power to the furnace. Set the thermostat to

"HEAT" and/or the desired tem- perature setting. Set the ON-

OFF-FAN switch to =ON".

In the event of any flashback or explosion, immediately shut off the furnace and call your service

technician.

To Turn off Gas to Appliance

1. Set the thermostat to the low-

est setting.

2. Turn offall electdcpowerto the appliance if service isto be

performed.

3. Remove the furnace doors.

4. Move gas control switch to

=OFF"position. DO NOT FORCE.

5. Replace the furnace doors.

GAS CONTROL LEVER

PRESSURE

REGULATING

DEVICE

FIGURE I:STANDING PILOT

GAS VALVE

SEQUENCE OF

OPERATION

1. On a call for heat, the thermo- statcontactsclose, supplying

24 VAC to the gas valve.

2. When the gas valve is ener- gized it initially opens at a

reduced flow and opens fully after approximately 30 sec-

onds.

3. About 1-2 minutes after the burner lights, the furnace air

circulation blower will come on.

4. When the cell for heat is satis- fied the thermostatcontacts

open, the gas valve shutsoff gas flow.

5. After the burner shutsoff,the

air circulationblowerwill con-

tinue to run for 2-4 minutes, until the furnace has cooled.

Unitary Products Group 3

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