Carrier 48TM004-014, 48TF004-014 User Manual
Single-Package Rooftop Heating/
User’s Information Manual
48TF004-014
48TM004-014
Cooling Units
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 per-
formed by a qualified installer, service
agency or the gas supplier.
Improper installation, adjustment, alteration,
service or maintenance can cause injury or
property damage. 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 and lockout tag is
installed. Electrical shock could cause personal injury.
Your rooftop com bination heating/cooling unit is equipped
with an automatic direct spark ignition and induced draft combustion blower.
TO LIGHT UNIT
1. Do not turn off the electrical power to unit without
first turning off the gas supply .
2. Before attempting to start the gas heating sec tion, familiarize yourself with all the procedures that must be
followed.
3. Never 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, then ca ll
your dealer as soon as possible.
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 —
install lockout tag.
Step 4 —
Step 5 —
position 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. 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 and
Remove the burner access panel.
Move the control on the gas valve to the OFF
Move control on gas valve to ON position.
Replace the burner 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
Do not attempt to light by hand; personal injury 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. 534-80104 Printed in U.S.A. Form 48T-1SO Pg 1 502 3-02 Replaces: 48TF-2SO
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 personal injury.
GAS VALVE
Fig. 1A — Gas Valve Location (Sizes 004-007)
Fig. 1B — Gas Valve Location (Sizes 008-014)
Step 4 —
Step 5 —
position.
Step 6 —
Step 7 —
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 uni t 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 any gas control
which has been under water.
Remove the burner access panel.
Move the control on the gas valve to the OFF
Replace the burner access panel.
If unit is being shut down because of a malfunc-
MAINTAINING YOUR UNIT
All maintenance should be handled by skilled, experienced
personnel. Your dealer can help you establish a standard
procedure.
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 prevented from reaching
the unit. Clearance of at least 3 ft on size 004-007 units and 4 ft
on size 008-014 units on the flue and condenser sides and 6 in.
on all other sides is required. A clearance of 5 ft is required
above the condenser discharge.
TO SHUT UNIT OFF
Do not turn off the electrical power to unit w ithout first
turning off the gas supply .
Failure to follow this procedure can result in serious fire
or personal injury.
Refer to Fig. 3 while proceeding with the following steps.
Step 1 —
and set SYSTEM switch to OFF position.
Step 2 —
Step 3 —
install lockout tag.
Set room ther m ostat to lowest te m pe r ature setting
Close the external manual gas valve.
Turn off the electrical power supply to unit and
ROUTINE MAINTENANCE AND CARE
FOR THE EQUIPMENT OWNER
Consider the following information before maintaining or
servicing equipment:
1. TURN OFF GAS SUPPLY AND THEN ELECTRICAL POWER TO YOUR UNIT BEFORE SERVICING OR PERFORM ING MAI NTE NAN CE.
2. Do not turn off electrical power to this unit without
first turning off the gas supply .
3. When removing access panels or performing maintenance functions inside your unit, be aware of sharp
sheet metal parts and screws. Although special care
has been taken to reduce sharp edges inside the unit,
be extremely careful when handling parts or reaching
into the unit.
2
MAIN
OFF
ON
LOCK-OUT
TAG
STEP 1
ONE-STAGE VALVE
STEP 4
TWO-STAGE VALVE
STEP 2
ONE-STAGE VALVE
ONE STAGE
48TFD,TMD005-009
48TFE,TME004-007
48TFF,TMF004-006 (single phase)
48TFG,TMG005,006
48TFH,TMH004-006
48TFK,TMK004-006
48TFL,TML005,006
48TFM,TMM004-006
48TFN,TMN004-006
TWO-STAGE VALVE
TWO STAGE
48TFF,TMF004-006 (3 phase)
48TFD,TMD012, 014
48TFE,TME008-014
48TFF,TMF007-014
STEP 5
STEP 3
ONE STAGE
48TFD,TMD005-009
48TFE,TME004-007
48TFF,TMF004-006 (single phase)
48TFG,TMG005,006
48TFH,TMH004-006
48TFK,TMK004-006
48TFL,TML005,006
48TFM,TMM004-006
48TFN,TMN004-006
STEP 8
→
TWO STAGE
48TFF,TMF004-006 (3 phase)
48TFD,TMD012, 014
48TFE,TME008-014
48TFF,TMF007-014
STEP 6
STEP 9
Fig. 2 — To Light Unit
3
STEP 7
STEP 10
502
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