Carrier ZW, ZN030-105, Z6, 48ZT, Z8075-105, 48ZG specifications Condenser Fan

Fan and Belts — Periodically check the condition of fan wheels and housings and belt tension. When service is neces- sary, call your dealer.

Evaporator-Fan Motor, Condenser-Fan Motor and Combustion-Fan Motor — Lubrication is not recommended. Bearings will not require lubrication for at least 5 years of normal operation. After 5 years, motor life can be extended by having the motors serviced at an authorized motor service shop.

Fan Shaft Bearings — Charge fittings annually with Shell Alvania No. 2 or equivalent grease.

Evaporator and Condenser Coils — Cleaning of the coils should only be done by qualified service personnel. Contact your dealer for the required maintenance as needed.

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.

Compressors — All compressors are factory shipped with a normal charge of the correct type refrigeration grade oil in them and should rarely require additional oil. The service technician must be certain the proper oil level is maintained in the compressor when it is installed and running.

Condenser Fan

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 prop- er cooling. Contact your dealer for any required service.

Electrical Controls and Wiring — Electrical controls are difficult to check without proper instrumentation; therefore, 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; therefore, if inadequate cooling is suspected, contact your dealer for service.

Combustion Area and Vent System — The com- bustion area and vent system should be visually inspected be- fore each heating season. The normal accumulation of dirt, soot, rust, and scale can result in loss of efficiency and improp- er performance if allowed to build up. Accumulation on the burner crossover tube can result in the burners firing out of nor- mal time sequence. This delayed ignition is characterized by an especially loud sound.

If your unit makes an unusual or especially loud noise when the main burners are lit, shut down the heating section and call your dealer. Bodily injury or unit damage may result.

See Fig. 1 and 5 and proceed as follows to inspect the com- bustion area and power-venting system of your unit.

1.Turn off gas supply and then electrical power to your unit.

2.Open gas section access door.

3.Using a flashlight, carefully inspect the burner areas for dirt, soot, rust, or scale.

If dirt, soot, rust, or scale accumulations are found, call your dealer and do not operate your heating section. Bodily injury or unit damage may result.

4.When you have completed your inspection, follow the start-up procedures in this manual to restore your unit to operation.

5.Observe unit heating operation, and watch the burner flame core to see if it is bright blue. If you observe a sus- pected malfunction, or if the burner flame cores are not bright blue, call your dealer. See Fig. 6.

NOTE: Burner flame cores that have a mixture of orange, yellow, or red flames together with the blue may not be burning gas efficiently. Your dealer may have to adjust the air/gas mixture.

6.Replace gas section access panel.

Unit Panels and Doors — After performing any main- tenance or service on the unit, be sure all panels and doors are securely fastened in place to prevent rain from entering unit cabinet and to prevent disruption of the correct unit airflow pattern.

Fig. 5 — Typical Location of Access Panel

Fig. 6 — Proper Flame Appearance

7