Carrier 25HNB5 Heat Pump Maintenance

WARNING: ELECTRICAL SHOCK HAZARD Failure to follow this warning could result in personal injury or death. Disconnect all electrical power to unit before performing any maintenance or service on outdoor unit. Remember to disconnect power supply to air hand

The minimum maintenance that should be performed on this equipment is as follows:

CAUTION: UNIT DAMAGE HAZARD Failure to follow this caution may result in equipment damage or improper operation. Because of possible damage to the equipment or personal injury, maintenance should be performed by qualified personnel only.

Desert and Seacoast Locations

Special consideration must be given to installation and maintenance of condensing units installed in coastal or desert locations. This is because salt and alkali content of sand adheres to aluminum fins of coil and can cause premature coil failure due to

Preventive measures can be taken during installations, such as:

Maintenance in desert and seacoast locations:

Cleaning Coil

NOTE: 4--sided deluxe units employ one louver spacer on each of the four sides to prevent louver movement during operation. The louver spacers are trapped between the coil surface and louver at the approximate center of each side (See Fig. 4). This louver

CAUTION: UNIT DAMAGE HAZARD Failure to follow this caution may result in equipment damage or improper operation. Coil fin damage can result in higher operating costs or compressor damage. Do not use flame, high--pressure water, steam, volatile or corrosiv

Cleaning Outdoor Fan Motor and Blade

Electrical Controls and Wiring

Refrigerant Circuit

Final Check--Out

After the unit has been operating, the following items should be checked.