Carrier 48PG20-28, 48HG14-28, 48PM16-28, 48HJ20-28 User Manual

0 (0)

48HG14---

28, 48HJ20---

28

48PG20---

28, 48PM16---

28

Gas Heating/Electric Cooling Unit

User’s Information Manual

NOTE TO INSTALLER:

This manual should be left with the equipment owner.

TABLE OF CONTENTS

SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . . . . . . . . . 1 DETERMINE TYPE OF UNIT CONTROL . . . . . . . . . . . . . . . 2 TO LIGHT UNIT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-6 Units with Thermostat Control . . . . . . . . . . . . . . . . . . . . . . . . . 2 Units with ComfortLINKt Control . . . . . . . . . . . . . . . . . . . . 3 TO SHUT UNIT OFF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-8 Units with Thermostat Control . . . . . . . . . . . . . . . . . . . . . . . . . 6 Units with ComfortLINK Control . . . . . . . . . . . . . . . . . . . . . . 6 MAINTAINING YOUR UNIT . . . . . . . . . . . . . . . . . . . . . . . . . . 8

ROUTINE MAINTENANCE AND CARE FOR

THE EQUIPMENT OWNER . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 REGULAR DEALER MAINTENANCE . . . . . . . . . . . . . . . . 10

BEFORE YOU CALL FOR SERVICE, CHECK

FOR SEVERAL EASILY SOLVED PROBLEMS . . . . . . . . . 11

!WARNING

FIRE, EXPLOSION HAZARD

Failure to follow this warning could result in personal injury, death and/or property damage.

1. Improper installation, adjustment, alteration, service, or maintenance can cause property damage, personal injury, or loss of life. Refer to the User’s Information Manual provided with this unit for more details.

2.Do not store or use gasoline or other flammable vapors and liquids in the vicinity of this or any other

appliance.

What to do if you smell gas:

1.DO NOT try to light any appliance.

2.DO NOT touch any electrical switch, or use any phone in your building.

3.Leave the building immediately.

4.IMMEDIATELY call your gas supplier from a neighbor’s phone. Follow the gas supplier’s

instructions.

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

SAFETY CONSIDERATIONS

Installation and servicing of air-conditioning equipment can be hazardous due to system pressure and electrical components. Only trained and qualified service personnel should install, repair, or service air-conditioning equipment.

Untrained personnel can perform the basic maintenance functions of replacing filters. All other operations should be performed by trained service personnel. When working on air-conditioning equipment, observe precautions in the literature, tags and labels attached to the unit, and other safety precautions that may apply.

Follow all safety codes. Wear safety glasses and work gloves. Have fire extinguishers available for all brazing operations.

Recognize safety information. This is the safety-alert symbol . When you see this symbol on the furnace and in instructions or manuals, be alert to the potential for personal injury.

Understand the signal words DANGER, WARNING, and CAUTION. These words are used with the safety-alert symbol. DANGER identifies the most serious hazards which will result in severe personal injury or death. WARNING signifies a hazard which could result in personal injury or death. CAUTION is used to identify unsafe practices which may result in minor personal injury or product and property damage. NOTE is used to highlight suggestions which will result in enhanced installation, reliability, or operation.

!WARNING

PERSONAL INJURY, DEATH AND / OR PROPERTY DAMAGE HAZARD

Failure to follow this warning could result in personal injury, death or property damage.

Improper installation, adjustment, alteration, service, maintenance, or use can cause explosion, fire, electrical shock, or other conditions which may cause personal injury or property damage. Consult a qualified installer, service agency, or your distributor or branch for information or assistance. The qualified installer or service agency must use factory-authorized kits or accessories when modifying this product.

!WARNING

ELECTRICAL SHOCK HAZARD

Failure to follow this warning could result in personal injury or death.

Before performing recommended maintenance, be sure main power switch to unit is turned off and lockout tag is installed.

Your combination heating/cooling unit is equipped with direct spark ignition and induced draft power combustion blower.

!WARNING

FIRE, EXPLOSION HAZARD

Failure to follow this warning could result in personal injury, death and/or property damage.

Burners will light automatically. Do not attempt to light by hand.

!WARNING

ELECTRICAL OPERATION HAZARD

Failure to follow this warning could result in personal injury, death, or property damage.

Do not use this unit if any part has been under water. A flood-damaged unit is extremely dangerous. Attempts to use the unit can result in fire or explosion. A qualified service agency should be contacted to inspect the unit and to replace all gas controls, control system parts, electrical parts that have been wet or the furnace if deemed necessary.

IMPORTANT: Always keep the unit’s area clear of combustible materials. Do not obstruct the air openings to the unit. Air is required for combustion and ventilation proper operation. Follow the instructions provided in this book for lighting and shutting down the unit. Should the gas supply fail to shut off or if overheating occurs, shut off the gas valve to the unit before shutting off the electrical supply. The following inspections must be completed post unit installation. The detailed routine maintenance inspections are in the Maintaining Your Unit section.

Post Unit Installation Inspection:

1.All flue and vent connections are clear and free of obstructions, are leak-free and not damaged.

2.Duct connections are leak-free and physically sound.

3.The unit base support is free of cracks, gaps, etc.

4.There are no signs of unit deterioration.

5.Burners are aligned correctly.

6.Follow routine maintenance inspection.

DETERMINE TYPE OF UNIT CONTROL

The procedures used to light or shut off the unit depend on the type of unit control. This section will help determine the control type of the unit.

Electro-Mechanical Control

These units may be controlled directly by a thermostat, or indirectly by a third-party control that connects to the thermostat inputs. For direct thermostat control, use the Electro-Mechanical Control procedures in this book. For units with third-party controls connected to the thermostat inputs, refer to the third-party control instructions for procedures to ensure complete unit shut off.

ComfortLinkt Control

These units have a factory-installed Carrier ComfortLink control. A Scrolling Marquee display is located on the front of the unit control box behind the control box and compressor access door. These units may be controlled directly by a thermostat, directly by a space temperature sensor, or indirectly through other Carrier Comfort Networkr (CCN) communication devices. To ensure complete unit shut off, use the ComfortLink Control procedures in this book.

TO LIGHT UNIT

(UNITS WITH THERMOSTAT CONTROL)

!DANGER

FIRE, EXPLOSION HAZARD

Failure to follow this warning could result in personal injury or death.

1.Do not turn off the electrical power to unit without first turning off the gas supply and apply lockout tags.

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

3.Never attempt to manually light the burners on the unit with a match, lighter, or any other flame. If the electric sparking

device fails to light the burners, refer to the shutdown procedures, then call your dealer as soon as possible.

See Fig. 1 for location of gas valve. 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 OFF position.

Step 2 — Close the external gas pipings manual shut off valve located outside the unit.

Step 3 — Turn off the electrical supply to the unit and install lockout tag.

Step 4 — Remove the heat section access panel.

Step 5 — Turn the Off/On selector switch on the gas valve to the OFF position and wait 5 minutes.

Step 6 — Move the Off/On selector switch on the gas valve to the ON position.

Step 7 — Replace the heat section access panel.

2

Step 8 — Remove lockout tag and turn on the electrical supply to unit.

Step 9 — Open the external gas pipings manual shut off valve located outside the unit.

Step 10 — Set room thermostat temperature selector slightly above room temperature and set system switch to HEAT position to start the unit. The induced-draft combustion air fan will start. Main burners light within 30 seconds. Indoor blower will start within a few seconds of main gas ignition.

Step 11 — Set the temperature selector on room thermostat to desired setting.

 

COMBUSTION

 

FAN HOUSING

HEAT

INDUCED

EXCHANGER

DRAFT

SECTION

MOTOR

 

IGC BOARD

MAIN GAS

VALVE

(HIDDEN)

 

 

MAIN BURNER

 

SECTION

C07259

Fig. 1 - Typical Gas Heating Section

!WARNING

FIRE, EXPLOSION HAZARD

Failure to follow this warning could result in personal injury, death, and/or property damage.

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.

TO LIGHT UNIT

(UNITS WITH COMFORTLINK

CONTROL)

!DANGER

FIRE, EXPLOSION HAZARD

Failure to follow this warning could result in personal injury, death, and/or property damage.

1.Do not turn off the electrical power to unit without first turning off the gas supply and apply lockout tags.

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

3.Never attempt to manually light the burners on the unit with a match, lighter, or any other flame. If the electric sparking

device fails to light the burners, refer to the shutdown procedures, then call your dealer as soon as possible.

3

Carrier 48PG20-28, 48HG14-28, 48PM16-28, 48HJ20-28 User Manual

STEP 1

STEP 4

STEP 7

STEP 2

CONTROL I.D.

LABEL

SWITCH (SHIPPED IN

ON

OFF

“ON” POSITION)

1/4˝ X .032˝ MALE SPADE TERMINALS (2) COMMON

MAIN

ON

OFF

LOCK-OUT

TAG

STEP 3

CONTROL I.D.

LABEL

SWITCH (SHIPPED IN

ON

OFF

“ON” POSITION)

1/4˝ X .032˝ MALE SPADE TERMINALS (2) COMMON

STEP 5

STEP 6

STEP 8

STEP 9

STEP 10

C09513

Fig. 2 - To Light Unit

4

Loading...
+ 7 hidden pages