Carrier 48DJE - Manual (Page 3)

TO SHUT UNIT OFF
A WARNING
1. Do not turn off the electrical power to unit without
first turning off the gas supply.
2. 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 burn­
ers, refer to the following shutdown procedures, then
call your dealer as soon as possible.
Failure to follow these procedures can result in serious
fire or personal injury.
Refer to Fig. 3 while proceeding with the following steps.
Step 1 — Set room thermostat to lowest temperature set­
ting and set SYSTEM switch to OFF.
Step 2 — Close the external manual gas valve.
Step 3 — Turn off electrical power supply to unit.
Step 4 — Remove the burner compartment access panel.
Step 5 — Turn the control dial on the gas valve clock­
wise Q to the OFF position.
Step 6 — Replace the burner compartment access panel.
Step 7 — 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 to ensure opera­
tion 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 shut­
ting 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 which has been under water.
MAINTAINING YOUR UNIT
All maintenance should be handled by skilled, experi­
enced personnel. Your dealer ean help you establish a stan­
dard procedure.
For your safety, keep the area around the unit clear and
free of combustible materials, gasoline and other flamma­
ble liquids and vapors.
To assure proper functioning of the unit, the flow of com­
bustion and ventilating air must not be obstructed from reach­
ing the unit. Clearance of at least 3 ft on flue and condenser
sides and 6 in. on all other sides is required.
ROUTINE MAINTENANCE AND CARE
FOR THE EQUIPMENT OWNER
Before proceeding with those things you might want to
maintain yourself, please carefully consider the following:
A WARNING
1. TURN OFF GAS SUPPLY AND THEN ELECTRI­
CAL POWER TO YOUR UNIT BEFORE SERVIC­
ING OR PERFORMING MAINTENANCE.
2. Do not turn off electrical power to this unit without
first turning off the gas supply.
3. When removing access panels or performing main­
tenance functions inside your unit, be aware of sharp
sheet metal parts and screws. Although special care
has been taken to reduce sharp edges to a minimum,
be extremely careful when handling parts or reach­
ing into the unit.
Air Filter(s) — Air filter(s) should be checked at least
every 3 or 4 weeks and changed or cleaned whenever they
become dirty. Table 1 indicates the correct filter size for
your unit. See Fig. 4 for filter access door location.
To replace or inspect filters:
1. On 48DJD,DJE units, lift open the filter access door and
lift and pull the filter track until it falls toward you. On
48LJD,LJE units, remove screws on filter access panel
and remove panel. Lift up filter track and pull track un­
til it falls toward you. If the 48LJD,LJE unit has a field-
installed accessory filter access door, follow instructions
above for 48DJD,DJE units.
2. Remove the left filter by pulling outward from the track.
3. Slide the right filter over to the left and then remove.
When installing filters, note the direction of airflow ar­
rows on the filter frame.
NOTE: It is recommended that filters be field installed out­
side of the unit on horizontal economizer/two-position damper
applications. Otherwise, the economizer/two-position damper
will have to be partially removed to access the filters. The
area of the field-installed filters should be equal to the area
of the factory-installed filters as shown in Table 1.
If you have difficulty in locating your air filter, or if you
have questions concerning proper filter maintenance, con­
tact your dealer for instructions. When replacing your unit
filters, always use the same size and type of filter that was
originally supplied by the installer.
Units with outdoor air capability have a cleanable filter
for the outdoor air. This filter should be checked annually
and cleaned as necessary with steam or hot water and a
mild detergent. Do not use disposable filters in place of
cleanable filters.
A WARNING
Never operate your unit without filters in place. Fail­
ure to heed this warning may result in damage to the
blower motor and/or compressor. An accumulation of
dust and lint on internal parts of your unit can cause
loss of efficiency and, in some cases, fire.
Table 1 — Indoor-Air Filter Data
UNfT SIZE
48DJD/DJE
48UD,LJE
INDOOR-AIR FILTERS
(Disposable Fiberglass)
Quantity Size (in.)
004-007 2 1 6 x 2 5 x 2
008,009 4 1 6 x 2 0 x 2
012,014 4 2 0 X 2 0 X 2
NOTE: Replacement filters should be UL (Underwriters’ Laborato­
ries) certified or equivalent.