23
T
O
PREVENT
PERSONAL
INJURY
OR
DEATH
DUE
TO
IMPROPER
INSTALLATION
,
ADJUSTMENT
,
ALTERATION
,
SERVICE
OR
MAINTENANCE
,
REFER
TO
THIS
MANUAL
. F
OR
ADDITIONAL
ASSISTANCE
OR
INFORMATION
,
CONSULT
A
QUALIFIED
INSTALLER
,
SERVICE
AGENCY
OR
THE
GAS
SUPPLIER
.
WARNING
S
HEET
METAL
PARTS
,
SCREWS
,
CLIPS
AND
SIMILAR
ITEMS
INHERENTLY
HAVE
SHARP
EDGES
,
AND
IT
IS
NECESSARY
THAT
THE
INSTALLER
AND
SERVICE
PERSONNEL
EXERCISE
CAUTION
.
CAUTION
Preventive maintenance is the best way to avoid unneces-
sary expense and inconvenience. Have this system inspected
at regular intervals by qualified service personnel, at least
twice a year. Routine maintenance should cover the follow-
ing items:
1. Tighten all belts, set screws, and wire connections.
2. Clean evaporator and condenser coils mechanically
or with cold water, if necessary. Usually any fouling is
only matted on the entering air face of the coil and
can be removed by brushing.
3. Lubricate motor bearings.
4. Align or replace belts as needed.
5. Replace filters as needed (see below).
6. Check for blockage of condensate drain.
7. Check power and control voltages.
8. Check running amperage.
9. Check operating temperatures and pressures.
10. Check and adjust temperature and pressure controls.
11. Check and adjust damper linkages.
12. Check operation of all safety controls.
13. Examine gas furnaces (see below and the User’s
Information Manual).
14. Check condenser fans and tighten set screws.
FILTERS
CAUTION
T
O PREVENT PROPERTY DAMAGE DUE TO FIRE AND LOSS OF
EQUIPMENT EFFICIENCY OR EQUIPMENT DAMAGE DUE TO DUST AND LINT
BUILD UP ON INTERNAL PARTS, NEVER OPERATE UNIT WITHOUT AN AIR
FILTER INSTALLED IN THE RETURN AIR SYSTEM.
Every application may require a different frequency of replace-
ment of dirty filters. Filters must be replaced at least every
three (3) months during operating seasons.
Dirty filters are the most common cause of inadequate heat-
ing or cooling performance. Filter inspection should be made
at least every two months; more often if necessary because
of local conditions and usage.
Dirty throwaway filters should be discarded and replaced with
a new, clean filter.
Disposable return air filters are supplied with this unit. See
the unit Specification Sheet or Technical Manual for the cor-
rect size and part number. To remove the filters, remove the
filter access panel on return side of the unit.
CABINET FINISH MAINTENANCE
Use a fine grade automotive wax on the cabinet finish to
maintain the finish’s original high luster. This is especially
important in installations with extended periods of direct sun-
light.
CLEAN OUTSIDE COIL (QUALIFIED SERVICER ONLY)
The coil with the outside air flowing over it should be inspected
annually and cleaned as frequently as necessary to keep the
finned areas free of lint, hair and debris.
CONDENSER, EVAPORATOR, AND INDUCED DRAFT MOTORS
Bearings on the air circulating blower motor, condenser mo-
tor and the combustion fan motor are permanently lubricated.
No additional oiling is required.
FLAME SENSOR (QUALIFIED SERVICER ONLY)
A drop in the flame current can be caused by a nearly invis-
ible coating on the flame sensor. This coating, created by the
fuel or combustion air supply, can be removed by carefully
cleaning the flame sensor with steel wool.
NOTE: After cleaning, the microamp signal should be stable
and in the range of 4 - 6 microamps DC.
FLUE PASSAGES (QUALIFIED SERVICER ONLY)
At the start of each heating season, inspect and, if neces-
sary, clean the unit flue passage.
LUBRICATION
The fan shaft bearings, the 1 to 2 HP supply fan motors the
condenser fan motors and compressors are permanently lu-
bricated.
INSPECTION & CLEANING
All flue product carrying areas of the furnace, its vent sys-
tem, and main burners should be examined by a qualified
service agency before the start of each heating season. This
examination is necessary for continued safe operation. Par-
ticular attention should be given to deterioration from corro-
sion or other sources. This examination is accomplished in
the following manner.
1. Disconnect power to the unit and remove furnace
section access panel.
2. Remove burner assembly:
a. Disconnect the wires from the gas valve after noting
which wires are connected to each terminal.
