Carrier 48PG20-28, 48HG14-28, 48PM16-28, 48HJ20-28 User Manual
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.........
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
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.
!
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.
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)
!
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.
DANGER
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.
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
andsetSYSTEMswitchtoOFFposition.
Step 2 — Close theexternal 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.
!
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 theblower fails to come on,
shut down gas heating section and call your dealer for service.
TO LIGHT UNIT
(UNITS WITH COMFORTLINK™
CONTROL)
HEAT
EXCHANGER
SECTION
IGC BOARD
(HIDDEN)
Fig. 1 -- Typical Gas Heating Section
MAIN BURNER
SECTION
COMBUSTION
FAN HOUSING
INDUCED
DRAFT
MOTOR
MAIN GAS
VALV E
C07259
!
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.
DANGER
3
MAIN
OFF
ON
STEP 1
STEP 4
CONTROL I.D.
LABEL
SWITCH (SHIPPED IN
“ON” POSITION)
1/4˝ X .032˝ MALE SPADE
TERMINALS (2) COMMON
STEP 2
STEP 5
T
U
-O
K
C
LO
G
TA
STEP 3
CONTROL I.D.
LABEL
OFF
ON
SWITCH (SHIPPED IN
“ON” POSITION)
1/4˝ X .032˝ MALE SPADE
TERMINALS (2) COMMON
OFF
ON
STEP 6
STEP 7
STEP 8
STEP 10
Fig. 2 -- To Light Unit
4
STEP 9
C09513
Loading...