Heat Exchanger —
To ensure dependable and efficient
heating operation, the heat exchanger should be checked by
a qualified maintenance person before each heating season,
and cleaned when necessary. This checkout should not be
attempted by anyone not having the required expertise and
equipment to do the job properly. Checking and/or cleaning
the heat exchanger involves removing the gas controls as-
sembly and the flue collector box cover and, when com-
pleted, reinstalling the gas controls assembly for proper op-
eration. Also, the flue collector box cover must be replaced
correctly so that a proper seal is maintained. Contact your
dealer for the required periodic maintenance.
Fans and Belts —
Periodically check the condition of
fan wheels and housings, and belt tension. When service is
necessary, call your dealer.
Evaporator-, Condenser-, and Combustion Fan
Motors —
Lubrication is not recommended. Bearings will
not require lubrication for at least 5 years of normal opera-
tion. After 5 years, motor life can be extended by having the
motors serviced at an authorized motor service shop.
Fan Shaft Bearings —
Lubrication is not recom-
mended. When service is necessary, call your dealer.
Evaporator and Condenser Coils —
Cleaning of
the coils should only be done by qualified service personnel.
Contact your dealer for the required annual maintenance.
Condensate Drain —
The drain pan and condensate
drain line should be checked and cleaned at the same time
the cooling coils are checked by your dealer.
Compressors —
All compressors are factory shipped
with a normal charge of the correct type refrigeration grade
oil in them and should rarely require additional oil. The serv-
ice technician must be certain the proper oil level is main-
tained in the compressor when it is installed and running.
48HJ015,017 AND 48TJ016,020
48HJ025 AND 48TJ024,028
Fig. 4 — Panel Locations
BURNER ACCESS
PANEL (HIDDEN)
HOOD
(OPTION)
OUTDOOR-AIR
FILTER
RETAINER
OUTDOOR-AIR
FILTERS
MOTORS AND FILTER
ACCESS PANEL
MOTOR AND
FILTER
ACCESS PANEL
HOOD
(OPTION)
BURNER ACCESS
PANEL (HIDDEN)
OUTDOOR-
AIR FILTERS
OUTDOOR-
AIR FILTER
RETAINER
5
