Carrier WEATHERMAKER® 48A CV/SAV, Vertical Commercial Rooftop HVAC Maintenance

Consider the following information before maintaining or servicing equipment:

Warning

1. TURN OFF GAS SUPPLY AND THEN ELECTRICAL POWER TO YOUR UNIT BEFORE SERVICING OR PERFORMING MAINTENANCE.

2. Do not turn off electrical power to this unit without first turning off the gas supply

3. When removing access panels or performing maintenance functions inside your unit, be aware of sharp sheet metal parts and screws. Although special care has been taken to reduce sharp edges inside the unit, be extremely careful when handling parts or re

Failure to follow these procedures can result in serious fire or personal injury.

Air Filter(s)

To replace or inspect filters:

Fig. 4 — To Shut Unit Off

If you have difficulty in locating your air filter or if you have questions concerning proper filter maintenance, contact your dealer for instructions. When replacing your unit filters, always use the same size and type of filter that was originally suppl

Units with outdoor air capability have a cleanable filter for the outdoor air. This filter should be checked annually and cleaned as necessary with steam or hot water and a mild detergent. Do not use throwaway filters in place of cleanable filters.

Warning !

Never operate your unit without filters in place. Failure to heed this warning may 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, fir

Heat Exchanger

Fans and Belts

Periodically check the condition of the

When service is necessary, call your dealer.

Indoor-Fan Motor, Outdoor-Fan Motor, and Combustion Fan Motor

Fan Shaft Bearings

Evaporator and Condenser Coils

Contact your dealer for the required annual maintenance.

Condensate Drain

Compressor

Condenser Fan

Warning! Do not poke sticks, screwdrivers, or any other object into revolving fan blades. Severe bodily injury may 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

Refrigerant Circuit

Combustion Area and Vent System

CAUTION ! If your unit makes any unusual or especially loud noises during heating, shut down the heating section and call your dealer

See Fig. 1 and 2 and proceed as follows to inspect the combustion area and power-venting system of your unit.

Using a flashlight, carefully inspect the burner areas for

CAUTION! If dirt, soot, rust, or scale accumulations are found, call your dealer and do not operate your heating section.

WARNING! Components in heat section may be hot after unit has been started. When observing flame, be careful not to get close to or touch heating components. Serious personal injury may result

Unit Panels

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 follow

Inspection of all flue product passages including the

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 Controls, Start-Up, Operation, Service and Troubleshooting literature.

BEFORE YOU CALL FOR SERVICE, CHECK FOR PROBLEMS THAT CAN BE EASILY SOLVED

If insufficient heating or cooling is suspected:

If your unit is not operating at all, check the following list for easy solutions:

If closed, has the gas been shut off for safety reasons? Otherwise, you may open the valve and follow the start-up procedures listed in this manual.

NOTE: Before proceeding with the next check, turn OFF the electrical power supply to the unit. Remove the gas section access panels

If the dealer knows exactly which unit you have, he may be able to offer suggestions over the phone, or save valuable time through knowledgeable preparation for the service call.

IN CASE OF TROUBLE

If, after performing the above checks, unit performance is unsatisfactory, shut off the unit and call your dealer