48VG: Owner’s Information Manual
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
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A07797
Fig. 7 – To Shut-off Unit Electric Cooling
To replace or inspect filters in accessory filter rack (See
):
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. See
sizes supplied with accessory filter rack.
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 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.
Compressor
All compressors are factory shipped with a normal charge of the correct
type of refrigeration grade oil.
Condenser (Outdoor) Fan
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.
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.
Combustion Area and Vent System
For proper and safe operation, the unit needs air for combustion and
ventilation. The air openings, on the unit, the air openings to the area in
which the unit is installed, and the spacing around the unit must not be
blocked or obstructed.
The combustion air inlet area and vent hood should be inspected visually
before each heating season. The normal accumulation of dirt, soot, rust,
and scale can result in loss of efficiency and improper performance if
allowed to build up. This inspection should be done by a trained service
person.
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OFF
ON
MAIN
WARNING
!
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
!
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
!
FIRE, EXPLOSION HAZARD
Failure to follow this warning could result in personal injury, death
and/or property damage.
If your unit makes an especially loud noise when the main burners are
ignited, shut down the heating section and call your dealer.
