1. Introduction and Product Overview
The GRE HPG70 Easy Pool Heat Pump is an efficient solution for heating swimming pool water, allowing for an extended swimming season. This system operates by extracting heat from the ambient air, converting it into energy, and transferring it to the pool water.
This heat pump is designed to increase the water temperature for pools up to 70 cubic meters. It is capable of operating in ambient temperatures as low as 7°C.
Key features include:
- Efficient heating for pools up to 70 m³.
- Minimum operating temperature: 7°C.
- Equipped with a rotary compressor for reliable performance.
- Features an automatic defrosting system.
- Standard 50 mm pipe connection.
- Includes a protective cover for winter storage.
2. Safety Information
Please read all safety instructions carefully before installation and operation to prevent injury or damage to the unit.
- Electrical Safety: Ensure the unit is connected to a properly grounded electrical outlet. All electrical work must be performed by a qualified electrician and comply with local regulations.
- Installation Location: The heat pump must be installed outdoors in a well-ventilated area to ensure proper airflow and efficient operation. Do not obstruct the air intake or exhaust.
- Water Connection: Ensure all plumbing connections are secure and watertight to prevent leaks.
- Children and Pets: Keep children and pets away from the unit during operation.
- Maintenance: Disconnect power before performing any maintenance or cleaning.
- Refrigerant: This unit contains R32 refrigerant. Servicing involving the refrigerant circuit should only be performed by certified personnel.
3. Product Components
The GRE HPG70 heat pump consists of several key components:
- Control Panel: Digital display and buttons for setting temperature and operating modes.
- Pressure Gauge: Displays the system's operating pressure.
- Water Inlet/Outlet: Connections for the pool's water circulation system.
- Air Intake/Exhaust: Vents for drawing in and expelling air.
- Compressor: The core component responsible for heat transfer.
- Evaporator/Condenser: Coils for heat exchange.
Image 3.1: Close-up view of the GRE HPG70 heat pump's control panel and pressure gauge. The digital display allows users to monitor and adjust settings, while the pressure gauge indicates the system's operational status.
4. Setup and Installation
Proper installation is crucial for the efficient and safe operation of your heat pump. It is recommended to have a qualified professional perform the installation.
4.1. Placement
- The heat pump must be installed outdoors in a well-ventilated area.
- Ensure there is sufficient clearance around the unit for proper airflow (refer to the technical specifications for exact distances).
- Place the unit on a solid, level surface to minimize vibration and noise.
- Avoid installing the unit near windows or areas where noise might be a concern.
4.2. Plumbing Connection
- The heat pump must be installed after the filtration system and before any chemical injection points (e.g., chlorinator).
- A bypass kit is essential for the heat pump to function correctly. This allows for controlled water flow through the heat pump and enables isolation for maintenance.
- Connect the heat pump to your pool's circulation system using 50 mm piping. Ensure all connections are sealed properly to prevent leaks.
- Use flexible connectors to reduce vibration transmission to the plumbing.
4.3. Electrical Connection
- The heat pump requires a 220-240V~/50Hz/1PH power supply.
- Ensure the electrical circuit is adequately sized for the heat pump's maximum current (32A) and protected by a suitable circuit breaker and residual current device (RCD).
- All electrical connections must be waterproof and comply with local electrical codes.
- Consult a qualified electrician for electrical installation.
5. Operating Instructions
Once installed and connected, operating the GRE HPG70 heat pump is straightforward.
5.1. Initial Start-up
- Ensure the pool pump is running and water is circulating through the heat pump.
- Open the bypass valves to allow water to flow through the heat pump.
- Switch on the electrical power to the heat pump.
- The unit will typically perform a self-check and then display the current water temperature.
5.2. Setting Desired Temperature
- Use the control panel buttons (refer to Image 3.1) to adjust the desired water temperature.
- The heat pump will automatically turn on and off to maintain the set temperature.
- Allow sufficient time for the pool water to reach the desired temperature, especially during initial heating.
5.3. Automatic Defrosting
The HPG70 features an automatic defrosting system. In colder ambient conditions, frost may form on the evaporator coils. The unit will automatically initiate a defrost cycle to remove this frost, ensuring continuous efficient operation. This is a normal function and does not indicate a fault.
6. Maintenance
Regular maintenance ensures the longevity and efficiency of your heat pump.
6.1. Routine Cleaning
- Keep the area around the heat pump clear of debris, leaves, and other obstructions to ensure proper airflow.
- Periodically clean the exterior of the unit with a soft cloth and mild detergent. Do not use harsh chemicals or abrasive cleaners.
- Inspect the evaporator coils for dirt or blockages. If dirty, gently clean with a soft brush or low-pressure water spray.
6.2. Winterization
Before the winter season or when temperatures consistently drop below 7°C, it is recommended to winterize your heat pump:
- Turn off the heat pump and disconnect its electrical power.
- Close the bypass valves and drain all water from the heat pump's plumbing to prevent freezing damage.
- Disconnect the water pipes from the unit.
- Clean the exterior of the unit.
- Place the provided protective cover over the heat pump to shield it from harsh winter weather.
7. Troubleshooting
This section provides solutions to common issues you might encounter.
| Problem | Possible Cause | Solution |
|---|---|---|
| Heat pump not turning on | No power supply; Circuit breaker tripped; Control panel error. | Check power connection; Reset circuit breaker; Consult manual for control panel error codes. |
| Insufficient heating | Low ambient temperature; Insufficient water flow; Dirty coils; Incorrect temperature setting. | Ensure ambient temperature is above 7°C; Check pool pump and bypass valves; Clean coils; Verify temperature setting. |
| Unit making unusual noise | Loose components; Fan obstruction; Compressor issue. | Inspect for loose parts; Clear any obstructions from fan; If noise persists, contact support. |
| Water leaks | Loose plumbing connections; Damaged piping. | Tighten all connections; Inspect pipes for damage and replace if necessary. |
For issues not listed here or if problems persist, please contact customer support.
8. Specifications
Detailed technical specifications for the GRE HPG70 heat pump:
Image 8.1: Technical specifications label for the GRE HPG70 heat pump, detailing electrical, refrigerant, and performance data.
| Specification | Value |
|---|---|
| Model Number | HPG70 |
| Dimensions (L x W x H) | 1096 x 410 x 698 mm (External) / 69.5 x 104 x 41 cm (Product) |
| Net Weight | 76 - 77 kg |
| Material | Plastic |
| Heating Capacity (Air 28°C, Water 28°C, 80% humidity) | 14 KW |
| Power Supply | 220-240V~ / 50Hz / 1PH |
| Nominal Current | 11.5 A |
| Max Current | 32 A |
| Protection Rating | IPX4 |
| Refrigerant Type - Charge | R32 - 850g |
| GWP Value | 675 - 0.57 |
| Maximum Allowable Pressure | 4.2 MPa |
| Functioning Temperature Range | +7°C / 43°C |
| Water Flow Rate | 4-7.9 m³/h |
9. Warranty and Support
For warranty information, please refer to the documentation provided at the time of purchase or contact your retailer. Keep your proof of purchase for warranty claims.
For technical support, spare parts, or service inquiries, please contact Gre customer service or your authorized dealer. When contacting support, please have your model number (HPG70) and serial number ready.
