13
MAINTENANCE
HIGH VOLTAGE!
D
ISCONNECT
ALL
POWER
BEFORE
SERVICING
OR
INSTALLING
THIS
UNIT
. M
ULTIPLE
POWER
SOURCES
MAY
BE
PRESENT
. F
AILURE
TO
DO
SO
MAY
CAUSE
PROPERTY
DAMAGE
,
PERSONAL
INJURY
OR
DEATH
.
WARNING
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 unnecessary ex-
pense and inconvenience. Have this system inspected at regular
intervals by qualified service personnel, at least twice a year. Rou-
tine maintenance should cover the following 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.
F
ILTERS
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 heating or
cooling performance. Filter inspection should be made at least
every two months; more often if necessary because of local condi-
tions 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 correct size
and part number. To remove the filters, remove the filter access
panel on return side of the unit.
C
ABINET
F
INISH
M
AINTENANCE
Use a fine grade automotive wax on the cabinet finish to maintain
the finish’s original high luster. This is especially important in in-
stallations with extended periods of direct sunlight.
C
LEAN
O
UTSIDE
C
OIL
(Q
UALIFIED
S
ERVICER
O
NLY
)
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.
C
ONDENSER
F
ANS
Bearings on the condenser fan motors are permanently lubricated.
No additional oiling is required.
L
UBRICATION
The fan shaft bearings and the supply fan motor have grease fit-
tings that should be lubricated during normal maintenance checks.
F
UNCTIONAL
P
ARTS
Refer to the unit Parts Catalog for a list of functional parts. Parts
are available from your distributor.
