Owner's Manual

5
Air Filters
UNIT OPERATION HAZARD
Failure to follow this caution may result in property
damage.
Never operate your unit without filters in place. An
accumulation of dust and lint on internal parts of your unit
can cause loss of efficiency and blower motor and/or
compressor damage.
!
CAUTION
The air filter(s) should be checked every 3 or 4 weeks and
changed or cleaned whenever it becomes dirty. Dirty filters
produce excessive stress on the blower motor and can cause the
motor to overheat and shut down.
This unit must have air filters in place before it can be operated.
These filters can be located in one of at least two places. In many
applications, the installer will provide return air filter grilles
mounted on the wall or ceiling of the conditioned structure. In the
instance of filter grilles, the filters can simply be removed from the
grille and replaced.
The other typical application is an accessory filter rack installed
inside the unit itself. The following information is given to assist in
changing filters used in these internal filter racks.
Filter kits are available as a purchased accessory or a factory
installed option. The same filter kit is included with the accessory
economizers and factory installed economizers.
Table 1 – Replacement Filter Sizes
48VR Unit Size Filter Size in . (mm)
24-040/060
2each20x12x1
(508 x 305 x 25 mm)
30-040/060
2each20x12x1
(508 x 305 x 25 mm)
36-060/090
1 each 24 x 14 x 1 (610 x 406 x 25),
24 x 16 x 1 (610 x 406 x 25)
42-060/090
1 each 24 x 14 x 1 (610 x 356 x 25),
24 x 16 x 1 (610 x 406 x 25)
48-090/115/130*
1 each 24 x 16 x 1 (610 x 406 x 25),
24 x 18 x 1 (610 x 457 x 25)
60-090/115/130*
1 each 24 x 16 x 1 (610 x 406 x 25),
24 x 18 x 1 (610 x 457 x 25)
*Units with bent indoor coil.
To replace or inspect filters in accessory filter rack (See Fig. 2):
1. Remove the filter access panel using a 5/16--in. nut driver .
2. Remove the filter(s) by pulling it out of the unit. If the
filter(s) is dirty, clean or replace with a new one.
When installing the new filter(s), note the direction of the airflow
arrows on the filter frame which should be pointing at the indoor
coil.
3. Reinstall filter access panel ensuring opening is air and
water tight.
If you have difficulty locating your air filter(s) or have questions
concerning proper filter maintenance, contact your dealer for
instructions. When replacing filters, always use the same size and
type of filter that was supplied originally by the installer.
Fans and Fan Motors
Periodically check the condition of fan wheels and housings and
fan motor shaft bearings. Contact your dealer for the required
annual maintenance.
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 properly do the job. Contact
your dealer for the required periodic maintenance.
Indoor and Outdoor Coils
Cleaning of the coils should only b e 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.
Compressor
All compressors are factory shipped with a normal charge of the
correct type of refrigeration grade oil. A compressor should rarely
require additional oil.
Condenser (Outdoor) Fan
PERSONAL INJURY AND UNIT DAMAGE
HAZARD
Failure to follow this warning could result in personal
injury , death or property damage.
Do not insert sticks, screwdrivers, or any other objects into
revolving fan blades.
!
WARNING
The fan must be kept free of all obstructions to ensure proper
cooling. Contact your dealer for any required service.
Electrical Controls and Wiring
Electrical controls are difficult to check without proper
instrumentation. If there are any discrepancies in the operating
cycle, contact your local dealer and request service.
Refrigerant Circuit
The refrigerant circuit is difficult to check for leaks without the
proper equipment. If inadequate cooling is suspected, contact your
local dealer for service.
EXPLOSION AND ENVIRONMENTAL HAZARD
Failure to follow this warning could result in personal
injury , death or property damage.
System under pressure. Relieve pressure and recover all
refrigerant before system repair or final unit disposal. Use
all service ports and open all flow--control devices,
including solenoid valves.
!
WARNING
Unit Panels
After performing any maintenance or service on the unit, be sure
all panels are fastened securely in place to prevent rain from
entering unit cabinet and to prevent disruption of the correct unit
airflow pattern.