The PROHEAT II Series Heat Pump is an air/water system designed to heat pool basins, extending the bathing season by utilizing energy from the air. This equipment is supplied fully assembled with complete electrical wiring and a definitive charge of R410A refrigerant gas. Each machine undergoes testing in a laboratory before shipping.
Function Description:
The PROHEAT II heat pump is controlled by the NA8981 regulator, which is suitable for air-water heat pumps with one or two compressors. It features temperature probes for water input and output, evaporator defrost, compressor discharge, and ambient temperature. Safety sensors include high and low-pressure switches, a flow switch for water flow control, a compressor consumption meter, and an internal fan thermal switch.
The regulator offers four operating modes: Cool, Heat, Auto, and Manual selection. In Heat mode, the machine starts heating when the probe temperature is below the "Temperature setpoint - Temperature differential" and stops when it is above the "Setpoint temperature + Temperature differential." In Cool mode (chiller models), the machine starts cooling when the probe temperature is above the "Temperature setpoint + Temperature differential" and stops when it is below the "Setpoint temperature - Temperature differential." In Auto mode (chiller models), the machine cools when the probe temperature is above the "Temperature setpoint + Auto mode temperature differential" and heats when it is below the "Setpoint temperature - Auto mode temperature differential."
The system includes an Auto Defrost Controlling feature with an optimized logical defrost design, ensuring normal operation at low temperatures. It also has a Sequential Compressor Start-up to prevent excessive peak power consumption. For winter protection, the Winter Anti-Freeze Protection recirculates water by starting the water treatment pump to prevent freezing in pipes. An Emergency Stop push-button with manual interlock and reset cuts off general power.
Important Technical Specifications:
The PROHEAT II series is available in various power outputs, including 35 kW, 45 kW, 60 kW, 90 kW, and 120 kW, with both standard/chiller and indoor models.
- Power Supply: 230V±10% or AC 380V±10%.
- Refrigerant Gas: R410-A (quantities vary by model: 4 kg for 35 kW, 6 kg for 45 kW, 9 kg for 60 kW, 2x7 kg for 90 kW, and 2x9 kg for 120 kW).
- Water Flow: Ranges from 12-15 m³/h for 35 kW to 50-70 m³/h for 120 kW models.
- Connection Diameter: 63 mm for 35 kW and 45 kW, 75 mm for 60 kW, 90 kW, and 120 kW.
- Maximum Output Capacity: Water pump (30A/220VAC), Fan (10A/220VAC), Compressor 1 & 2 (5A/220VAC each), 4-way valve (5A/220VAC).
- Temperature Probes: NTC R25=5kΩ, B(25/50)=3470K.
- Sound Pressure (Standard/Chiller): Ranges from 66.20 dBA to 72.53 dBA (at 1m) and 60.85 dBA to 69.39 dBA (at 5m).
- Net Weight: Ranges from 185 kg (35 kW) to 500 kg (120 kW).
Usage Features:
- Temperature Display and Controlling: The display shows water temperature, and users can set the desired temperature within operating limits. Probe settings can also be viewed.
- Different Period of Operation: Two operating modes: "Heating" and "Schedule programming." In "Heating" mode, the machine operates until the setpoint temperature is reached. In "Schedule programming" mode, up to three operating periods can be scheduled.
- Remote Switch: Allows the unit to be turned ON/OFF remotely. When closed, the unit operates normally; when open, it stops and displays "OFF."
- Keypad Blocking: Buttons on the display can be locked/unlocked by pressing the up and down arrows simultaneously for 5 seconds.
- Manual Reset: The machine can be manually switched ON/OFF.
Maintenance Features:
- Preventive Maintenance: A record of all maintained components and actions/repairs should be kept.
- Power Disconnection: Always disconnect the equipment from the power supply before performing any maintenance.
- Exterior Cleaning: Exterior panels can be cleaned with a soft cloth and non-abrasive cleaner.
- Evaporator Coil: Should be kept clean and free of obstacles. Clean with low-pressure water and non-abrasive detergents.
- Compressor: Check oil (if equipped with a viewer), crankcase heater function, refrigerant charge, power consumption, discharge/intake pressures, fasteners, and ensure no frost develops.
- Condenser: Chemical product dosifiers should be installed "downstream" from the heat pump, at a lower height, and as far away as possible. Never in the suction pipe of the water treatment pump. Avoid placing concentrated chemical products in pool skimmers.
- Antifreeze Protection: In climates with sporadic freezing, circulate water with the treatment pump to keep water above 0ºC. For persistent freezing, drain all water treatment and heating system components.
- Fan: Verify fan flows annually. Clean fan louvers and protection grill regularly.
- Electrical Panel: Check all electrical connections, verify no overheating of terminals, ensure safety systems work correctly, and calibrate the thermostat/main control with a mercury thermometer.
Safety Precautions:
- Installation and maintenance must be performed by certified professionals in electrical, hydraulic, and refrigeration fields.
- Do not install in flammable or explosive environments.
- Wear personal protective equipment (safety work clothes, shoes, glasses, earplugs, heat/cold protective gloves) when working with the equipment.
- Be aware of hazards such as liquid accumulations (slippage), electrical shock, moving parts (fans), sharp edges, refrigerant gas, hot/cold surfaces, pressurized gases, and fire.
- Ensure safety devices are in working order and not tampered with.
- The primary hydraulic circuit must not be galvanized steel or aluminum to prevent corrosion.
- The unit should never operate without water circulating through the hydraulic system.
- Maintain the packaged equipment upright to prevent compressor damage.
- Condensation drain must always be unobstructed. Install a siphon in the condensation drainage to prevent liquid and odor returns.
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