Introduction
This manual provides detailed instructions for the installation, operation, and maintenance of the LILYTECH ZL-R200A Universal Air Source Heat Pump Water Heater Controller. This controller is designed to manage air source heat pump systems for hot water heating, offering features such as auxiliary heating, water flow warning, pump control ventilation, antifreeze function, auto defrost, and various protection mechanisms.
Key Features:
- Auxiliary heating function
- Water flowing warning
- Pump control ventilation
- Antifreeze function
- Action failure sensor
- Auto Defrost function
- Automatic restart function
- Temperature depletion protection
- Compressor delay and pressure protection
The package includes two sets of water heater controllers and their respective accessories. The main components are made of plastic and come in white, black, and red colors.
Setup and Installation
Wiring Diagram
Refer to the wiring diagram below for proper connection of all components. Incorrect wiring may lead to system malfunction or damage.
Important Installation Notes:
- U34 Setting: Ensure parameter U34 is set correctly. The system will not function properly if U34 is configured incorrectly.
- Real Clock: The internal real-time clock can only maintain accurate time for 72 hours after power supply is lost.
- Sensor Installation: All sensors must be installed in their correct and designated positions as indicated in the wiring diagram.
- Panel Placement: The control panel should be installed indoors to protect it from environmental elements. Do not install it outdoors.
- Power Connection: Avoid plugging or unplugging the panel bundle while the power supply is connected to prevent electrical hazards or damage to the unit.
Operating Instructions
Power ON/OFF
To switch the controller between online and offline modes, press and hold the ON/OFF key for 3 seconds.
Setting Temperature (SP)
Press the SET key to enter temperature setting mode. You can quickly adjust the temperature by holding down the key. The factory default temperature setting is 40°C.
Working Mode Selection
Press the MODE key to toggle between 'AUTO' and 'SAVE' working modes.
- 'AUTO' Mode: The system will continuously heat according to the set parameters.
- 'SAVE' Mode: Heating will only occur within the three predefined time periods.
- If the 'Auto restart function' is disabled, the system will default to 'AUTO' mode after power is supplied.
Clock Setting
To set the clock:
- Press the CLOCK key. The hour digits will begin to blink.
- Use the UP/DOWN keys to adjust the hour.
- Press the CLOCK key again. The minute digits will blink.
- Use the UP/DOWN keys to adjust the minute.
Periods Setting for 'SAVE' Mode
To configure the heating periods for 'SAVE' mode:
- Press and hold the PERIODS key for 3 seconds to enter the period setting interface.
- Press the SELECT key to choose the desired period (up to 3 periods) and its on/off status.
- Use the UP/DOWN keys to set the specific time values for the selected period.
- Press and hold the PERIODS key for 3 seconds to save the settings and exit.
If there is no key operation for 15 seconds, the settings will not be saved, and the system will exit the setting mode. Each period has an on-time and an off-time. If a period's on-time equals its off-time (or is set to 0), that period will be disabled. If the off-time is earlier than the on-time, the off-time is considered to be on the second day.
Keypad Lock
When parameter U81 is set to 1, only the ON/OFF and MODE keys will be responsive.
System Parameter Set
To access and modify system parameters:
- Press and hold the SET key for 3 seconds. The display will show 'P00' for password entry.
- Use the UP/DOWN keys to set the password.
- Press the SET key to confirm. If the password is incorrect, the system will exit.
- If the password is correct, you will enter the parameter set status.
- Use the UP/DOWN keys to select a parameter.
- Press the SET key to view the current value of the selected parameter.
- Use the UP/DOWN keys to adjust the parameter value.
- Press the SET key to return to parameter selection.
- Press and hold the SET key for 3 seconds to save the settings and exit.
The system will exit the parameter setting mode if there is no key operation for 15 seconds, and any unsaved changes will be lost.
System Parameter Table
| No. | Code | Setting function | Range | Indication | Default |
|---|---|---|---|---|---|
| 1 | U01 | Hysteresis | 2 - 10 °C | 5 | |
| 2 | U30 | Defrost start time | 10 - 60 min | 45 | |
| 3 | U31 | Defrost start temperature | -9 - 0 °C | -5 | |
| 4 | U32 | Defrost stop temperature | 2 - 30 °C | 10 | |
| 5 | U33 | Maximum defrost time | 2 - 15 min | 8 | |
| 6 | U34 | Valve mode | 0 - 1 | 0: heat off, defrost on 1: heat on, defrost off | 0 |
| 7 | U50 | Exhaust protection temperature | 50 - 125 °C | 110 | |
| 8 | U51 | High/low pressure warning mode | 0 - 2 | 0: Disable 1: Closed when warning 2: Open when warning | 0 |
| 9 | U52 | Water flowing switch mode | 0 - 2 | 0: Disable 1: Effective when closed 2: Effective when open | 0 |
| 10 | U80 | Auto restart function | 0 - 1 | 0: Disable; 1: Enable | 0 |
| 11 | U81 | Keypad lock | 0 - 1 | 0: Unlocked; 1: Locked | 0 |
| 12 | U90 | Passwords | 00 - 99 | 11 |
Control Functions
The ZL-R200A controller manages various aspects of the heat pump system:
Temperature Control
- Heating Start: When the water temperature (T-water) is less than or equal to the Set Point (SP) minus parameter U01, heating will commence.
- Heating Stop: When T-water is greater than or equal to SP, heating will stop.
- Pump Start Procedure: 30 seconds after heating starts, the outdoor fan turns on and the valve takes action. After another 30 seconds, the compressor starts.
- Pump Stop Procedure: 30 seconds after heating stops, the outdoor fan turns off and the valve takes action. After another 30 seconds, the pump turns off.
- Note: The four-way valve operates according to the setting of parameter U34.
Auxiliary Electrical Heater Control
- Heater Start: If the outdoor temperature (T-outdoor) is less than or equal to 10°C AND the water temperature (T-water) is less than or equal to 33°C, the electrical heater will start.
- Heater Stop: If T-outdoor is greater than or equal to 12°C OR T-water is greater than or equal to 35°C, the electrical heater will stop.
- Note: The auxiliary heater will also activate during defrosting cycles.
Water Ventilation Pump Control
- The pump will turn on 60 seconds before the compressor starts and turn off 60 seconds after the compressor stops.
- The pump will remain active throughout the defrosting process.
- If no water flow is detected for 10 seconds, the compressor and heater will stop, and a warning will be issued. The system control will resume once water flow is restored.
Avoid Freezing in Winter (Offline Standby State)
- Anti-freezing Pumping Start: If T-outdoor is less than or equal to 2°C, anti-freezing pumping will start, running the pump for 3 minutes every 30 minutes.
- Anti-freezing Pumping Stop: If T-outdoor is greater than or equal to 3°C, this anti-freezing protection will cease.
Auto Defrost
- Start Auto Defrosting: When the compressor has been running for the duration set by U33, and if the pipe temperature (T-pipe) is less than or equal to U31, defrosting will begin. The compressor and outdoor fan will stop, the valve will act after 55 seconds, and the compressor will restart after another 5 seconds.
- Stop Defrosting: When T-pipe is greater than or equal to U32, or the compressor has been running for the duration set by U33, defrosting will stop. The compressor will stop, the valve will act after 55 seconds, and heating control will resume after another 5 seconds.
- Defrost after turning the system online: If the system is turned online and T-pipe is less than or equal to U31, a 1-second defrost cycle will occur.
Timer Defrost
- If the pipe sensor fails, and the compressor has been running for the duration set by U30, AND if the outdoor sensor is functional and T-outdoor is less than or equal to U31, defrosting will start.
- If the outdoor sensor fails, defrosting will also start.
Exhaustion Over Temperature Protection
- Protection Start: If the exhaustion temperature (T-exhaustion) is greater than or equal to U50 while the compressor is running, the compressor will stop.
- Protection Stop: When T-exhaustion is less than or equal to U50 minus 10°C, the protection will cease, and heating control will resume.
High/Low Pressure Warning and Protection
- Pressure Protection Start: If high/low pressure is detected as effective for 15 seconds while the compressor is running, pressure protection will activate, stopping the compressor until the high/low pressure is no longer effective.
- Machine Protection Mode: If pressure protection occurs 3 times within one hour, or if high/low pressure effectiveness persists for one hour, the controller will enter machine protection mode. In this mode, heating will not restart until the power supply is cycled (turned off and on again).
- Note: High/low pressure is not checked for the first 3 minutes after the compressor starts. The high/low pressure mode is configured via parameter U51.
Compressor Delay Protection
- After power is supplied, the compressor will only start after a 3-minute delay.
- After the compressor stops, it will not restart for another 3 minutes.
Water Sensor Failure Warning
If the water sensor fails, the system will stop heating and issue a warning.
Maintenance
General Care
- Keep the control panel clean and free from dust. Use a soft, dry cloth for cleaning.
- Ensure the control panel is installed indoors to protect it from moisture, extreme temperatures, and direct sunlight.
Sensor Checks
- Periodically inspect all sensors (water, pipe, exhaustion, outdoor, pressure, water flow) to ensure they are securely installed and free from damage or corrosion.
- If a water sensor fails, the system will stop heating. Replace faulty sensors promptly.
System Reset for Protection Modes
- If the controller enters machine protection mode due to persistent high/low pressure issues, you must cycle the power (turn off and then on again) to reset the system and clear the protection mode.
Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| System not heating | Water sensor failure | Check water sensor connection and functionality. Replace if faulty. |
| System not heating / Machine protection mode active | Persistent high/low pressure issues | Check for blockages or leaks in the system. Cycle power to reset the controller after resolving the pressure issue. |
| System malfunction / Incorrect operation | Incorrect U34 parameter setting | Access system parameters and verify U34 setting according to the manual. Adjust if necessary. |
| Clock loses time frequently | Power supply interruptions exceeding 72 hours | This is normal behavior. Reset the clock after prolonged power outages. |
| Keypad unresponsive (except ON/OFF and MODE) | Keypad lock (U81=1) is active | Access system parameters and set U81 to 0 to unlock the keypad. |
| No water flow detected / Warning | Water flow issue (e.g., pump failure, blockage) | Inspect pump operation and water circulation path for any obstructions. |
Specifications
- Model: ZL-R200A
- Type: Universal Air Source Heat Pump Water Heater Controller
- Material: Plastic
- Color: White, Black, Red
- Package Dimensions (approx.):
- Length: 20 cm
- Width: 15 cm
- Height: 5 cm
- Package Weight (approx.): 1.402 kg
Operational Parameters (Configurable via System Parameter Set)
- Hysteresis (U01)
- Defrost start time (U30)
- Defrost start temperature (U31)
- Defrost stop temperature (U32)
- Maximum defrost time (U33)
- Valve mode (U34)
- Exhaust protection temperature (U50)
- High/low pressure warning mode (U51)
- Water flowing switch mode (U52)
- Auto restart function (U80)
- Keypad lock (U81)
- Passwords (U90)
User Tips
- Always ensure all sensors are properly connected and functioning for optimal system performance and safety.
- Familiarize yourself with the system parameter table to customize settings like defrost cycles and temperature thresholds to best suit your specific heating needs and local climate.
- In case of repeated pressure protection activations, thoroughly inspect the entire heat pump system for underlying issues before simply resetting the controller.
Warranty and Support
For any technical assistance, troubleshooting beyond this manual, or warranty inquiries, please contact the seller or manufacturer directly. Keep your purchase records for warranty validation.
