Carrier 48HJ015-025 - User Manual

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User’s Information Manual

NOTE TO INSTALLER:

This manual should be left with the equipment owner.

FOR YOUR SAFETY

Do not store or use gasoline or other ﬂam-

mable vapors and liquids in the vicinity of

this or any other appliance.

Improper installation, adjustment, alteration, serv-

ice or maintenance can cause injury or prop-

erty damage. Refer to this manual. For assis-

tance or additional information consult a qualified

installer, service agency, or the gas supplier.

FOR YOUR SAFETY

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.

Before performing recommended maintenance, be

sure main power switch to unit is turned off. Elec-

trical shock could cause personal injury.

Your combination heating/cooling unit is equipped with

an automatic intermittent pilot and induced draft power

combustion blower.

Pilot will light automatically. Do not attempt to light

by hand; personal injury may result.

TO LIGHT UNIT

1. Do not turn off the electrical power to unit with-

out ﬁrst turning of the gas supply.

2. Before attempting to start the gas heating sec-

tion, familiarize yourself with all the proce-

dures that must be followed.

3. Never attempt to manually light the pilot on unit

with a match, lighter, or any other ﬂame. If the

electric sparking device fails to light the pilot,

refer to the shutdown procedures, then call your

dealer as soon as possible.

If you do not follow these instructions exactly, a

ﬁre or explosion may result, causing property dam-

age, injury, or loss of life.

See Fig. 1 for location of gas valves. Refer to Fig. 2 while

proceeding with the following steps.

Step 1 — Set room thermostat to the lowest temperature

setting and set SYSTEM switch to HEAT position.

Step 2 — Close the external manual gas valve.

Step 3 — Turn off the electrical supply to the unit.

Step 4 — Remove the burner compartment access panel.

Step 5 — Turn the control dial on the internal gas valve

counterclockwise to the OFF position and wait

5 minutes.

Step 6 — Turn control dial on internal gas valve clock-

wise to ON position.

Step 7 — Replace the burner compartment access panel.

Step 8 — Turn on the electrical supply to unit.

Step 9 — Open the external gas valve.

Step 10 — Set room thermostat selector slightly above

room temperature to start unit. The induced-draft combus-

tion air fan will start. Main burners light within 30 seconds.

Indoor blower will start within a few minutes of main gas

ignition.

Step 11 — Set the temperature selector on room thermo-

stat to desired setting.

48HJ015-025

48TJ016-028

Combination Heating/Cooling Units

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

Book 1 4

Tab 1a 6a

PC 111 Catalog No. 564-930 Printed in U.S.A. Form 48H,T-2SO Pg 1 9-96 Replaces: 48H,T-1SO

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Summary

Users Information Manual

General Safety Precautions

Safety guidelines for users, including handling flammable vapors and electrical shock prevention.

Gas Leak Response

Steps to take if you smell gas, emphasizing immediate actions and contacting the gas supplier.

Unit Lighting Procedure

Step-by-step instructions for lighting the unit, including critical safety warnings.

Maintaining Your Unit

Routine Maintenance and Owner Care

Guidance for owners on routine maintenance and care, including area clearance.

Servicing Safety Precautions

Safety warnings to turn off gas and electrical power before servicing.

Air Filter Maintenance

Instructions for checking, cleaning, or replacing air filters and filter data.

How to Shut Unit Off

Step-by-step procedures to safely shut down the unit, including gas and electrical.

Panel Locations and Component Maintenance

Heat Exchanger Maintenance

Checks and cleaning for the heat exchanger, recommending qualified personnel.

Fans and Belts Inspection

Periodically checking fan wheels, housings, and belt tension.

Motor and Fan Shaft Bearing Lubrication

Lubrication recommendations for motors and fan shaft bearings.

Coil and Drain Maintenance

Cleaning evaporator/condenser coils and condensate drain line.

Compressor Oil Level

Information on compressor oil levels and service technician's role.

System Inspection and Troubleshooting

Condenser Fan Safety

Warning against inserting objects into the condenser fan blades.

Electrical Controls and Wiring Checks

Guidance on checking electrical controls and wiring, recommending dealer service.

Integrated Gas Controller (IGC)

Information on the IGC board and its LED alarm codes.

Combustion Area and Vent System Inspection

Visual inspection of combustion area and vent system for dirt, soot, or scale.

Proper Flame Appearance

Description of correct burner flame appearance (bright blue).

Regular Dealer Maintenance and Service Advice

Regular Dealer Maintenance Checklist

A list of items a qualified service technician should inspect annually.

Easily Solved Problems

Checks for insufficient heating/cooling and units not operating at all.

In Case of Trouble

Action to take if performance is unsatisfactory after checks, including dealer contact.

The provided document is a User's Information Manual for Carrier 48HJ015-025 and 48TJ016-028 Combination Heating/Cooling Units. These units are designed for both heating and cooling functions, featuring an automatic intermittent pilot and an induced draft power combustion blower for heating.

Function Description:

These Carrier units serve as combination heating and cooling systems, providing climate control for residential or commercial spaces. The heating section utilizes a gas-fired furnace with an automatic intermittent pilot ignition system and an induced draft power combustion blower to ensure efficient and safe operation. The cooling section operates as a standard air conditioning unit. The manual emphasizes safety procedures for lighting and shutting down the unit, as well as routine maintenance to ensure optimal performance and longevity.

Important Technical Specifications:

Models Covered: 48HJ015-025 and 48TJ016-028.
Heating System: Gas-fired furnace with automatic intermittent pilot and induced draft power combustion blower.
Ignition: Automatic electric sparking device for pilot ignition. Manual lighting is strictly prohibited.
Air Filters:
- 48HJ Units: Fiberglass Throwaway, 4 filters, size 20 x 20 x 2 inches or 4 filters, size 16 x 20 x 2 inches.
- 48TJ Units: Fiberglass Throwaway, 4 filters, size 20 x 20 x 2 inches or 4 filters, size 16 x 20 x 2 inches.
- 48TJ028 Specific: Requires 2-inch industrial grade filters capable of handling face velocities up to 625 ft/min (e.g., American Air Filter no. 5700 or equivalent).
Control System: Integrated Gas Controller (IGC) board with an LED indicator for alarm codes (2 to 8 flashes in succession).
Flame Appearance (Heating): Proper burner flame should be bright blue, with a distinct flame core and flame tip. Some yellow flame may be present when the access panel is removed.

Usage Features:

Thermostat Control: The unit is controlled via a room thermostat with temperature selector and SYSTEM switch (HEAT, COOL, OFF).
Lighting Procedure:
1. Set room thermostat to lowest temperature and SYSTEM switch to HEAT.
2. Close external manual gas valve.
3. Turn off electrical supply.
4. Remove burner compartment access panel.
5. Turn internal gas valve control dial counterclockwise to OFF and wait 5 minutes.
6. Turn internal gas valve control dial clockwise to ON.
7. Replace burner compartment access panel.
8. Turn on electrical supply.
9. Open external gas valve.
10. Set room thermostat slightly above room temperature to start. Induced-draft fan starts, main burners light within 30 seconds, and indoor blower starts within a few minutes.
11. Set thermostat to desired setting.
Shutdown Procedure:
1. Set room thermostat to lowest temperature and SYSTEM switch to OFF.
2. Close external manual gas valve.
3. Turn off electrical supply.
4. Remove burner compartment access panel.
5. Turn internal gas valve control dial counterclockwise to OFF.
6. Replace burner compartment access panel.
Safety Warnings:
- Do not store or use flammable vapors/liquids near the appliance.
- Improper installation, adjustment, service, or maintenance can cause injury or property damage.
- Do not attempt to manually light the pilot.
- Always turn off the gas supply before turning off electrical power to the unit.
- Be aware of sharp sheet metal parts and screws when accessing internal components.
- Never operate the unit without filters in place to prevent damage and fire.
- Do not poke objects into revolving fan blades.
- If gas is smelled, do not light appliances, touch electrical switches, or use phones in the building. Call the gas supplier from a neighbor's phone or the fire department.
- If the pilot or main burner fails to light, or the blower fails to come on, shut down the heating section and call for service.
- If the unit makes a loud noise when main burners ignite, shut down the heating section and call for your dealer.
- If any part of the unit has been under water, call a qualified service technician.

Maintenance Features:

General: All maintenance should be handled by skilled, experienced personnel. Keep the area around the unit clear of combustible materials.
Air Filters:
- Check every 3-4 weeks and change/clean when dirty.
- Remove filters by pulling outward from the track.
- Always use the same size and type of filter originally supplied.
- Units with outdoor air capability have a cleanable filter for outdoor air, to be checked annually and cleaned by removing screws in the retainer.
Heat Exchanger: Checked and cleaned annually by a qualified maintenance person. Involves removing gas controls and flue collector box cover.
Fans and Belts: Periodically check condition of fan wheels, housings, and belt tension.
Motors (Evaporator, Condenser, Combustion Fan): Lubrication not recommended for at least 5 years. After 5 years, motor life can be extended by servicing at an authorized motor service shop.
Fan Shaft Bearings: Lubrication not recommended.
Evaporator and Condenser Coils: Cleaning should only be done by qualified service personnel annually.
Condensate Drain: Drain pan and line should be checked and cleaned annually.
Compressors: Factory-shipped with correct refrigeration grade oil; rarely requires additional oil. Service technician must ensure proper oil level.
Electrical Controls and Wiring: Difficult to check without proper instrumentation; contact dealer for discrepancies.
Refrigerant Circuit: Difficult to check for leaks without proper equipment; contact dealer for suspected inadequate cooling.
Combustion Area and Vent System: Visually inspected before each heating season for dirt, soot, rust, and scale. If found, call dealer and do not operate heating section.
Unit Panels: Ensure all panels are securely fastened after maintenance to prevent rain entry and maintain correct airflow.
Regular Dealer Maintenance (Annual/Biennial):
- Inspection of flue product passages (burners, baffles, heat exchanger, flue collector box, vent pipe).
- Inspection of combustion- and ventilation-air passages/openings.
- Inspection of gas pipes.
- Cleaning of condenser and evaporator coils.
- Cleaning of evaporator drain pan.
- Cleaning and lubrication of blower wheel housing and motor.
- Inspection of supply- and return-air ducts for leaks, obstructions, insulation integrity.
- Inspection of unit base for cracks, gaps.
- Inspection of unit casing for deterioration.
- Inspection of electrical wiring and components.
- Inspection for leaks in refrigerant circuit and pressure check.
- Operational check of the unit.
- Servicing dealer may offer service contracts.