ACCESS PANEL
FILTER ACCESS
PANEL*
*For accessory filter rack.
C99094
Fig. 2—Accessory Filter Rack Access Panel
1.Remove the filter access panel using a
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.
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.
CAUTION: Never operate your unit without the filter(s) in place. Failure to follow this caution will result in damage to the blower motor and/or compressor. An accumulation of dust and lint on internal parts of your unit can cause loss of efficiency and , in some cases, a fire.
FANS AND FAN MOTORS
Periodically, check the condition of fan wheels and housings and
INDOOR AND OUTDOOR COILS
Cleaning of the coils should only be done by qualified service personnel. Contact your dealer for the required annual mainte- nance.
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
CONDENSER (OUTDOOR) FAN
CAUTION: Do not poke sticks, screwdrivers, or any other objects into revolving fan blades. Injury or equip- ment damage will result.
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 instrumen- tations. If there are any discrepancies in the operating cycle, contact your 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.
WARNING: System under pressure. Relieve pressure and recover all refrigerant before system repair or final unit disposal to avoid serious injury or death. Use all service ports and open all
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.
C. Regular Dealer Maintenance
In addition to the type of routine maintenance you might be willing to perform, your unit should be inspected regularly by a properly trained service technician. An inspection (preferably each year, but at least every other year) should include the following:
1.Inspection and, if required, cleaning of the outdoor and indoor coils.
2.Inspection and, if required, cleaning of the indoor coil drain pan.
3.Inspection and cleaning of blower wheel housing and motor.
4.Inspection of all
5.Inspection of the unit base to ensure that no cracks, gaps, etc., exist which may cause a hazardous condition.
6.Inspection of the unit casing for signs of deterioration.
7.Inspection of all electrical wiring and components to assure proper connection.
8.Inspection for leaks in the refrigerant circuit. Pressure- check to determine appropriate refrigerant charge.
9.Operational check of the unit to determine working condi- tions. Repair or adjustment should be made at this time.
Your servicing dealer may offer an economical service contract that covers seasonal inspections. Ask for further details.
Complete service instructions can be found in the unit Installation,
D. Warranty Certificate
Unit 674B has a limited warranty. Be sure to read the warranty carefully to determine the coverage for your unit.
