The Reclaim Energy Heat Pump Controller V1.1 is designed to manage the operation of a Reclaim CO2 domestic hot water heat pump. It acts as the central interface for users to monitor and control their hot water system, offering various operational modes and displaying key system information.
Function Description:
The controller measures the tank temperature and compares it to stored set points, which can vary based on the selected operational option and time of day. When the lower temperature set point is reached, the controller signals the heat pump to begin heating via an RJ45 cable. Once the upper temperature set point is attained (typically 59°C), the controller signals the heat pump to stop heating. It also incorporates a Legionella safety feature, ensuring the water is heated to 59°C at least once every 24 hours.
The V1.1 controller introduces "Option 6," a remote control feature activated by a dry contact signal from a home management system, PV inverters, or dry contact smart switches. This allows for external control of the boost function.
Important Technical Specifications:
- Temperature Sensor: NTC 10K @25°C Beta 3435K. The sensor cable can be extended up to 15 meters.
- Communication Cable: RJ45 (CAT5 or CAT6) with specific wiring sequences (T-568A or T-568B). Positions 1, 2, 3, and 6 are the only differences between the two standards.
- Real Time Clock: Maintained by a Super Capacitor on the main circuit board, capable of keeping time for 3 weeks without power. The clock operates in 24-hour mode, and daylight saving adjustments must be made manually.
- Enclosure: Water-resistant (to rain) and UV-resistant, made of non-burning tough polycarbonate.
- Power: Prewired for "plug n play" installation. Requires suitable over-current and RCD protection.
- Display: 7-segment display showing time of day or measured temperature.
- Status LEDs:
- Green LED (Power): Flashing in standard mode, steady on in Boost mode.
- Yellow LED (Output): Steady on when the heat pump is active. Flashing in Boost mode.
- Red LED (Fault): Solid on to display a fault code. Flashing indicates a sensor fault.
Usage Features:
The controller offers several operational modes, selectable through the "User Menu":
- Option 1 (Temperature only control mode): Heat pump operates based solely on temperature set points (37°C T-on, 59°C T-off).
- Option 2 (Time control): Temperature control enabled from 22:00 for 9 hours.
- Option 3 (Time control): Temperature control enabled from 00:00 (midnight) for 6 hours.
- Option 4 (Time control): Temperature control enabled from 10:00 for 6 hours.
- Option 5 (User Settable): Two operational windows, with the first requiring at least 3 hours and the second configurable for 0 hours or more.
- Option 6 (Remote Control): One-shot boost activated by a dry contact closure. The system heats to 59°C and then stops. If the dry contact remains closed, the system enters "temperature mode" with the green light flashing. If the dry contact is not closed within an 18-hour cycle, the system automatically runs to meet the Legionella requirement.
Front Panel Operation:
- BOOST key (↑ EXIT):
- Normal Mode: Toggles Boost on/off.
- Menu Mode: Exits menu.
- Data Change Mode: Increments values.
- TEMP key (←↓):
- Normal Mode: Displays sensor temperature (°C).
- Menu Mode: Moves to the next setting.
- Data Change Mode: Decrements values.
- MENU key (ENTER):
- Normal Mode: Enters menu mode.
- Menu Mode: Enters/accepts settings.
Commissioning and Setting Time:
- Ensure the controller is powered on and the correct version ("r1" to "2" for V1.1) is set on the heat pump PCB.
- To set the time:
- Press MENU, then TEMP until "TIME" is displayed.
- Press MENU again, and "XX:XX" or "AdJ-" will appear.
- Use BOOST (UP) or TEMP (DOWN) to adjust the time.
- Press MENU to confirm, then BOOST (exit) to return to normal display.
Purge Mode:
This mode is used to purge air from the heat pump system.
- Ensure the controller is in Normal Display mode (Time or Temperature).
- Press and hold the MENU button for ~5 seconds.
- "Purg" will flash, the heat pump output will disable, and the purge output will enable for 5 minutes.
- All menu and display modes are disabled during this time.
- After 5 minutes, the purge output turns off, and control functionality resumes.
- Open the PTRV on the tank for 5 seconds until water comes out, then close it.
- Purge mode can be manually turned off by pressing and holding the MENU button for 5 seconds. It also automatically turns off if a heat pump error code is displayed.
Maintenance Features:
- Annual Checks: The installation should be checked at least annually for damage or malfunction by qualified personnel.
- Troubleshooting: The controller displays error codes (Eg-1 to Eg-10) for various heat pump faults. These codes correspond to fault conditions on the heat pump PCB for more detailed diagnostics.
- Sensor Replacement: Instructions are provided for replacing the temperature sensor, emphasizing the need to isolate mains power and use the correct NTC 10K @25°C Beta 3435K sensor.
- RJ45 Cable Check: If the tank is cold with no hot water and no error codes, a faulty RJ45 patch cable is suspected, requiring checks at both ends or replacement.
- Service Manual: For detailed troubleshooting procedures, a "Service Manual" is referenced, to be used only by licensed installers.
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