Bwt Horizontal Inverter Heat Pump HI-HC-66 User Manual

bwt Horizontal Inverter Heat Pump HI-HC-66 Manual

The bwt Horizontal Inverter Heat Pump HI-HC-66 is a compact pool heating and cooling system designed for residential swimming pools with a recommended water volume of approximately 15 to 30 m³. Its full-inverter technology continuously adjusts compressor speed to match the required heating load, helping maintain a stable water temperature while reducing unnecessary cycling and operating noise.

This horizontal inverter pool heat pump uses a titanium heat exchanger, R32 refrigerant, and a variable-speed compressor for efficient seasonal operation. It can heat pool water to a selected temperature and, where configured for cooling, help lower water temperature during hot weather. The unit is suitable for homeowners, pool installers, and property managers who want automatic temperature control across a longer swimming season.

The HI-HC-66 is particularly useful for smaller pools, spas with compatible circulation systems, and outdoor pools that require supplementary heating. It should be installed in a well-ventilated location with adequate clearance around the air inlet and outlet. A correctly adjusted bypass, clean filtration system, and consistent water flow are essential for reliable performance.

Before operating the bwt Horizontal Inverter Heat Pump HI-HC-66, read the installation instructions and confirm that the electrical supply, pipework, water chemistry, and protective devices meet local requirements. Professional installation is recommended because the appliance combines mains electricity, pressurized water, and refrigerant components.

bwt Horizontal Inverter Heat Pump HI-HC-66 Specifications

• Product type: Horizontal full-inverter swimming pool heat pump.
• Recommended pool volume: Approximately 15–30 m³, depending on climate, pool cover, insulation, wind exposure, and desired temperature.
• Heating output: Approximately 6.6 kW at 26°C air and 26°C water conditions.
• Certified heating output: Approximately 5.0 kW at 15°C air and 26°C water conditions.
• Cooling output: Approximately 3.0 kW under published 35°C air and 28°C water test conditions.
• Electrical supply: 230 V, single phase, 50/60 Hz configuration.
• Maximum operating current: Approximately 6.5 A.
• Refrigerant: R32.
• Heat exchanger: Titanium and PVC construction for swimming-pool applications.
• Water connections: 50 mm female solvent-weld connections.
• Recommended water flow: Approximately 2–4 m³/h for this model range.
• Temperature settings: Heating range approximately 18–40°C; cooling range approximately 12–30°C.
• Operating conditions: Performance is optimized in moderate outdoor temperatures. Do not operate outside the limits stated on the unit identification plate and current manual.
• Ingress protection: IPX4 for electrical parts.
• Dimensions: Approximately 894 × 349 × 648 mm.
• Approximate weight: 42 kg.

How to Install and Set Up the HI-HC-66 Pool Heat Pump

1. Place the unit on a stable, level base in an open, well-ventilated area. Keep the air intake and discharge free from walls, fences, plants, and other obstructions.
2. Confirm that the circulation pump, filter, pipe diameter, and electrical supply are suitable for the installation. Fit an approved residual-current device, isolator, circuit protection, and earth connection as required by local regulations.
3. Connect the pool return pipe to the heat-pump inlet and outlet using compatible 50 mm plumbing. Check the flow-direction markings before solvent welding or tightening fittings.
4. Install a bypass arrangement when required. Adjust the valves gradually so water flows through the heat pump within the recommended range without restricting the rest of the filtration system.
5. Open the plumbing valves and run the circulation pump. Inspect every connection for leaks and remove trapped air from the system.
6. Switch on the electrical isolator, then use the heat-pump control panel to select heating or cooling mode and set the target temperature.
7. Allow the unit to operate continuously during initial heating. A pool cover can reduce heat loss and shorten warm-up time.
8. If the model or installation includes wireless control, complete pairing using the control-panel or application instructions supplied for the specific controller. Do not assume that every regional version has identical connectivity features.

Safety warning: Never bypass electrical protection, operate the unit without water flow, remove sealed refrigerant covers, or modify internal components. Installation, electrical work, refrigerant servicing, and removal must be performed by qualified professionals.

HI-HC-66 Troubleshooting and Maintenance

Insufficient water flow or HP warning

Check that the circulation pump is running, the filter is clean, the valves are open, and the bypass is correctly adjusted. Confirm that water enters through the designated inlet and leaves through the outlet. Low flow can also result from blocked pipework or an incorrectly sized pump.

Unit runs but the pool does not warm

Verify the selected operating mode and temperature set point. Check whether the pool is losing heat through wind, evaporation, or an uncovered surface. Clean the air-side coil carefully and make sure the fan outlet is unobstructed. Heating performance naturally decreases in colder outdoor conditions.

Excessive noise or vibration

Confirm that the unit is level and firmly supported. Check for contact between the cabinet and nearby structures, loose panels, or debris in the fan area. Do not open the refrigerant circuit to investigate unusual sounds.

Water leakage

Stop the circulation system and inspect unions, solvent-weld joints, drain points, and the heat-pump connections. Electrical power should be isolated if water may have reached electrical components.

Preventive maintenance

Keep the air inlet and outlet clear, maintain balanced pool chemistry, clean the filter regularly, inspect pipe connections, and protect the unit from prolonged freezing conditions according to the official winterization procedure. Record unusual display messages and operating conditions before contacting support. For warranty claims, installation questions, or model-specific error-code interpretation, contact the BWT support service or the authorized dealer listed in the documentation supplied with the appliance. Do not rely on generic error-code lists when the exact display message is uncertain.

Pros and Cons of the bwt Horizontal Inverter Heat Pump HI-HC-66

Advantages

• Variable-speed operation: Full-inverter control can modulate output instead of repeatedly switching between full power and standby.
• Compact format: The horizontal cabinet is suitable for many equipment areas where vertical clearance is limited.
• Pool-compatible exchanger: Titanium construction is designed for use with treated swimming-pool water when chemistry is correctly maintained.
• Heating and cooling capability: The operating modes provide greater seasonal flexibility than a heating-only pool appliance.
• Small-pool suitability: The approximately 15–30 m³ recommendation makes it appropriate for many domestic pools and smaller installations.
• R32 refrigerant: The unit uses a modern refrigerant specified for this product family.

Limitations

• Dependence on outdoor conditions: Heating output falls as air temperature decreases, so cold-weather performance may not match the rated warm-condition figure.
• Requires correct hydraulics: Poor filtration, incorrect bypass adjustment, or inadequate flow can trigger protection warnings and reduce performance.
• Professional installation: Electrical, plumbing, and refrigerant-related work is not suitable for unqualified DIY installation.
• Not ideal for every pool: Larger or poorly insulated pools may require a higher-capacity heat pump, a pool cover, or additional heating support.
• Space and airflow requirements: The heat pump needs clear air circulation and should not be enclosed in a small, unventilated shed.

The bwt Horizontal Inverter Heat Pump HI-HC-66 best suits owners of smaller outdoor pools seeking modulated temperature control and efficient seasonal heating. Consider a larger model or a different heating system when the pool volume, climate, desired warm-up speed, or installation conditions exceed this model’s practical range.