Carrier 40QA024-060 - Manual (Page 19)

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SPECIAL OPERATION, HEATING — Outdoor cooling units
may be matched with heat pump ceiling-suspended fan coil
units to provide supplemental electric heat. All other operation
is the same as a cooling-only system, except these units have
heating capability as follows:
When the room thermostat initiates a call for heating, the
electric heater is turned on. The indoor unit fan will start at the
same time, if it was not already running.
When the heating requirement is satisfied, the room thermo-
stat will open, and the heater will turn off.
CLEANING AND MAINTENANCE
For proper system operation, perform the cleaning and
maintenance operations in Table 6.
Lubrication — The indoor-fan, automatic air sweep, and the
outdoor-fan motors are factory lubricated and require no oiling.
Air Filters (Fig. 23)
REMOVE AIR FILTERS — Remove filters by pulling them
straight out.
CLEAN OR REPLACE FILTERS — Filters can be vacu-
umed or washed in warm water. Shake filter to remove any ex-
cess water, and replace by sliding filter behind grille until filter
snaps in place. Refer to Fig. 23.
If the filter has begun to break down or is torn, replace it.
Replacement filters are available through your dealer.
Table 6 — Cleaning and Maintenance Schedule
NOTE: Maintenance procedures for the outdoor units are in the individual unit installation instructions.
To avoid the possibility of electric shock, before performing
any cleaning and maintenance operations, always turn off
power to the system by pressing the mode button on the
remote thermostat until the display shows “OFF,” and turn-
ing off the outdoor disconnect switch located near the out-
door unit. If the indoor unit is on a separate switch, be sure
to turn this disconnect off as well.
Do not wash filter in water over 120 F (to avoid shrinkage).
Do not expose filter to fire (to avoid fire damage). Do not
expose filter to direct sunlight. Clean filter more frequently
when air is extremely dirty.
Operating the system with dirty air filters may damage the
indoor unit and, in addition, can cause reduced cooling per-
formance, intermittent system operation, frost build-up on
the indoor coil, and blown fuses. Inspect and clean or
replace the air filters monthly.
TASK MONTHLY QUARTERLY YEARLY
INDOOR UNIT
Clean Air Filters X
Clean Drain Pipe X
Clean Condensate Drain Pan X
Clean Indoor Coil X
Clean Indoor Unit Front Panel X
OUTDOOR UNIT
Clean the Fins From Outside X
Open the Unit and Clean Fins Inside X
Remove Dust From Electrical Parts X
Check Electrical Connections are Tight X
Clean Outdoor Fan X
Clean Outdoor Coil X
Check that Outdoor Fan Assembly is Tight X
Clean Drain Pan X
Fig. 22 — Inserting Water into Drain Pan