Aquazone™ Constant Volume Water-Cooled Horizontal Water Source Heat Pump Unit 50HQP| Service

IMPORTANT: When a compressor is removed from this unit, system refrigerant circuit oil will remain in the compressor. To avoid leakage of compressor oil, the refrigerant lines of the compressor must be sealed after it is removed.

IMPORTANT: All refrigerant discharged from this unit must be recovered without exception. Technicians must follow industry accepted guidelines and all local, state and federal statutes for the recovery and disposal of refrigerants.

CAUTION: To avoid the release of refrigerant into the atmosphere, the refrigerant circuit of this unit must only be serviced by technicians which meet local, state and federal proficiency requirements.

WARNING: To prevent injury or death due to electrical shock or contact with moving parts, open unit disconnect switch before servicing unit.

Filters

• Filters must be clean for maximum performance

• Inspect filters every month under normal operating conditions.

IMPORTANT: Units should never be operated without a filter.

Water Coil

• Keep all air out of the water coil.

• Check open loop systems to be sure the well head is not allowing air to infiltrate the water line. Always keep lines airtight.

• Inspect heat exchangers regularly, and clean more frequently if the unit is located in a “dirty” environment.

• The heat exchanger should be kept full of water at all times.

• Open loop systems should have an inverted P trap placed in the discharge line to keep water in the heat exchanger during off cycles.

• Closed loop systems must have a minimum of 15 psig during the summer and 40 psig during the winter.

• Check P trap frequently for proper operation

IMPORTANT: To avoid fouled machinery and extensive unit clean-up, DO NOT operate units without filters in place. DO NOT use equipment as a temporary heat source during construction.

Condensate Drain Pans

• Check condensate drain pans for algae growth twice a year. If algae growth is apparent, consult a water treatment specialist for proper chemical treatment

• The application of an algaecide every 3 months will typically eliminate algae problems in most locations.

Refrigerant System

• Verify air and water flow rates are at proper levels before servicing. To maintain sealed circuitry integrity, do not install service gages unless unit operation appears abnormal.

Condensate Drain Cleaning

• Clean the drain line and unit drain pan at the start of each cooling season.

• Check flow by pouring water into drain. Be sure trap is filled to maintain an air seal.

Air Coil Cleaning

• Remove dirt and debris from evaporator coil as required by condition of the coil.

• Clean coil with a stiff brush, vacuum cleaner, or compressed air.

• Use a fin comb of the correct tooth spacing when straightening mashed or bent coil fins.

Condenser Cleaning

• Water-cooled condensers may require cleaning of scale (water deposits) due to improperly maintained closed-loop water systems.

• Sludge build-up may need to be cleaned in an open water tower system due to induced contaminants.

• Local water conditions may cause excessive fouling or pitting of tubes. Condenser tubes should therefore be cleaned at least once a year, or more often if the water is contaminated.

• Proper water treatment can minimize tube fouling and pitting. If such conditions are anticipated, water treatment analysis is recommended. Refer to the Carrier System Design Manual, Part 5, for general water conditioning information.

CAUTION: Follow all safety codes. Wear safety glasses and rubber gloves when using inhibited hydrochloric acid solution. Observe and follow acid manufacturer’s instructions. Failure to follow these safety precautions could result in personal injury or equipment or property damage.