Carrier 48HJ004-014 User Manual

Single-Package Rooftop

Heating/Cooling Units

User’s Information Manual

48HJ004-014

NOTE TO INSTALLER:

This manual should be left with the equipment owner.

WARNING: If the information in this manual is not followed exactly, a fire or explosion may result causing property damage, personal injury or loss of life.

— Do not store or use gasoline or other flam-

mable vapors and liquids in the vicinity of this or any other appliance.

— WHAT TO DO IF YOU SMELL GAS

• Do not try to light any appliance.

• Do not touch any electrical switch; do not use any phone in your building.

• Immediately call your gas supplier from a neighbor’s phone. Follow the gas supplier’s instructions.

• If you cannot reach your gas supplier, call the fire department.

— Installation and service must be performed

by a qualified installer, service agency or the gas supplier.

Improper installation, adjustment, alteration, service or maintenance can cause property damage, serious injury or death. Refer to this manual. For assistance or additional information consult a qualified installer, service agency, or the gas supplier.

Before performing recommended maintenance, be sure main power switch to unit is turned off. Electrical shock could cause serious injury or death.

TO LIGHT UNIT

1. D o not turn off the electrical power to unit without first turning off the gas supply .

2. Before attempting to start the gas heating section, familiarize yourself with all the procedures that must be followed.

If you do not follow these instructions exactly, a fire or explosion may result. Property damage, injury, or loss of life could occur.

See Fig. 1A and 1B for location of gas valve. Refer to Fig. 2

while proceeding with the following steps.

Step 1 —

setting and set SYSTEM switch to HEA T or AUT O. position.

Step 2 —

Step 3 —

disconnect.

Step 4 —

Step 5 —

and wait 5 minutes.

Step 6 —

Step 7 —

Step 8 —

Step 9 —

Step 10 —

room temperature to start unit. The induced-draft combustion air fan will start. Main gas valve will open and main burners should ignite within 5 seconds. If the burners do not light, there is a 22-second delay before another 5-second try. If the burner still does not light, the time delay is repeated. If the burner does not light within 15 minutes, there is a lockout. To reset the control, break the 24-v power to W1. Repeat Steps 1-10. If burners still do not light, call for service.

Step 11 —

to desired setting.

Set room thermostat to the lowest temperature

Close the manual gas valve. Turn off the electrical supply to the unit, tag

Remove the compressor access panel. Move the gas valve switch to the OFF position

Move the gas valve switch to the ON position. Replace the compressor access panel. Turn on the electrical supply to unit. Open the manual gas valve.

Set room thermostat selector slightly above

Set the temperature selector on room thermostat

Your rooftop com bination heating/cooling unit is equipped with an automatic direct spark ignition and induced-draft combustion blower.

Do not attempt to light by hand; serious injury or death may result.

Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.

Book 1 4 Ta b 1 a 6 a

PC 111 Catalog No. 534-80017 Printed in U.S.A. Form 48HJ-2SO Pg 1 11-00 Replaces: 48GJ,HJ-1SO

If the main burners fail to light, or the blower fails to come on, shut down gas heating section and call your dealer for service. Failure to follow these requirements could result in serious injury or death.

COMPRESSOR ACCESS PANEL

Fig. 1A — Gas Valve Location

(48HJ004-007)

Fig. 1B — Gas Valve Location

(48HJ008-014)

TO SHUT UNIT OFF

GAS VALVE

INTAKE LOUVERS

FLUE OPENING

Refer to Fig. 3 while proceeding with the following steps.

Step 1 —

Set room ther m ostat to lowest te m pe ra t u r e set ting

and set SYSTEM switc h to O FF.

Step 2 — Step 3 —

Close the external manual gas valve. Turn off the electrical power supply to unit;

install lockout tag.

Step 4 — Step 5 — Step 6 — Step 7 —

Remove the compressor access panel. Move the gas valve switch to the OFF position. Replace compressor access panel. If unit is being shut down because of a malfunc-

tion, call your dealer as soon as possible.

If unit is being shut down because the heating season has ended, restore electrical power to the unit and set thermostat to the COOL position to ensure operation of the cooling system during the cooling season.

Should overheating occur, or the gas supply fail to shut off, shut off the manual gas valve to the unit before shutting off the electrical supply.

Do not use this unit if any part has been under water. Immediately call a qualified service technician to inspect the unit and to replace any part of the control system and gas control that has been under water.

MAINTAINING YOUR UNIT

All maintenance should be handled by skilled, experienced personnel. Your Carri er service technician ca n help you set up a maintenance schedule.

For your safety, keep the area around the unit clear and free of combustible materials, gasoline, and other flammable liquids and vapors.

To ensure proper functioning of the unit, flow of combustion and ventilating air must not be obstructed f rom reaching the unit. Clearance of at least 3 ft on flue and condenser sides and 6 in. on all other sides is required.

1. D o not turn off the electrical power to unit without first turning off the gas supply .

2. N ever attempt to manually light the main burners on unit with a match, lighter, or any other flame. If the electric sparking device fails to light the main burners, refer to the following shutdown procedures. Call your dealer as soon as possible.

Failure to follow these procedures can result in fire, seri-

ous injury or death.

STEP 1

MAIN

OFF

LOCK-OUT

TAG

STEP 3STEP 2

2-STAGE GAS VALVE

48HJD005,006* 48HJE004-006* 48HJF004-006* 48HJD007-014 48HJE007-014 48HJF007-014

STEP 4

SINGLE-STAGE GAS

VALVE

48HJD005,006† 48HJE004-006† 48HJF004-006† 48HJG005,006 48HJH004-006 48HJK004-006 48HJL005,006 48HJM004-006 48HJN004-006

STEP 6

2-STAGE GAS VALVE

48HJD005,006* 48HJE004-006* 48HJF004-006* 48HJD007-014 48HJE007-014 48HJF007-014

STEP 7

STEP 5

SINGLE-STAGE GAS

VALVE

48HJD005,006† 48HJE004-006† 48HJF004-006† 48HJG005,006 48HJH004-006 48HJK004-006 48HJL005,006 48HJM004-006 48HJN004-006

*3-phase units only. †Single-phase units only.

STEP 8

STEP 9

STEP 10

Fig. 2 — To Light Unit

+ 5 hidden pages