9
93
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500W electric heater
】
This unit has included two electric heaters inside. Two electric heaters are used to keep the
water temperature when heat pump capacity is not enough or heat pump fail to work, as well
as heat the water up more rapidly when water temperature is low.
1. 500W electric heater only can be controlled by digital thermostat.
2. Power supply is 230V/50Hz/1Ph, and temperature setting range is 30~75
℃.
3. This heater is mainly used to get high temperature sanitary hot water or get hot water faster.
4. If heat pump fails to work, this heater can still work.
Operation knob for 500W heater is on front panel, for easy access. Please refers to following
picture.
【
】
Digital thermostat
Digital thermostat
SET
℃
Power supply: 110~240V.
Indicator light OUT
When the electric heater is turned on, the indicator light is always ON.
When the electric heater is turn off, the indicator light is OFF.
Temperature setting: Press SET, the set temperature flickers, press or to increase or
decrease the set temperature. The controller will save the setting.
Press SET again to exit and show the actual water tempeture in the display. If SET is not pressed,
the controller will also exit the setting after 3 seconds and show the actual water temperature in
the display.
Control logic
When the thermostat is powered on, the display shows the actual water temperature. When the
actual water tempeture is lower than (the set tempeture-3
℃
), the electric heater is turned on.
When the actual water temperature equals or higher than the set temperature, the electric heater stops.
Failure code
When the actual temperature which sensor detects is higher than 120
℃
or the sensor for thermostat
is short circuit, the display shows the failure code HH, and the electric heater stops.
When the actual temperature which sensor detects is lower than -45
℃
or the sensor for thermostat
is open circuit, the display shows the failure code LL, and the electric heater stops.
8. Electric Heater
Notice:
1. Please connect the cables according the wiring diagram.
2. The sensor cable can't be packed with power cable or communication cable, please connect
them separately, in order to avoid interference.
3. Sensor can't be dip into the hot water for a long time.
4. The thermostat initilize the setting the first second after power on, so don't touch the button
in the first second.
5. When the thermostat start to work, please remove the film on the display.
