90
o
Tank Thermo ON
Case 1: Internal Tank Heater is select and Tank Heater ON
o
Tank temperature < Tank set tempe R/C (Tank re-heat temperature)
Case 2: Tank Heater select OFF OR External Heater is select
o
Tank temperature < Tank water set tempe R/C (Tank re-heat temperature)
* When tank thermo ON, water pump will ON for 3 minutes then only heat pump turn ON.
* Tank water set temperature = tank set temperature or tank limit temperature whichever lower.
Outdoor ambient temperature
Tank limit temperature
OD < -17°C
48°C
-17°C <= OD < 36°C
52°C
36°C <= OD
50°C
2 ways valve close
Heat pump Thermostat Characteristic
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Heat pump Water Outlet set temperature is set to below table:
Outdoor ambient temperature
Heat pump water outlet set temperature
OD < -17°C
54°C
-17°C <= OD < -3°C
56°C
-3°C <= OD
59°C
Characteristic of heat pump thermos ON/OFF under tank mode condition:
Water Outlet Thermo Condition
Heat pump thermos OFF temperature:
1 Heat pump thermo OFF temperature = Target Water outlet tempe (2°C)
2 Water outlet temperature > heat pump thermo OFF temperature for continuously 90 seconds, heat pump
OFF but water pump continue ON.
Heat pump thermo ON temperature:
1 Heat pump thermo ON temperature = water inlet during thermo OFF time + [-3°C]
2 When water outlet temperature < heat pump thermo ON temperature, heat pump ON.
Water inlet thermo protection condition
Heat pump thermo OFF temperature:
1 Water inlet temperature > [60°C] for continuously 30 seconds, heat pump OFF, water pump continue ON.
Heat pump thermo ON temperature:
1 Heat pump thermos ON temp = water inlet temperature < [60°C].
Thermo ON/OFF for Heat Pump in Tank Operation:
When tank temperature achieve heat pump OFF condition, refer below condition:
Condition 1: When Internal Tank Heater is select and Tank Heater ON
Heat pump will turn OFF, water pump continue ON and room heater will continue ON if tank temperature below
tank heater thermo ON condition. 3 ways valve will only switch to room side after tank temperature reach tank
heater thermo OFF condition.
Condition 2: When Tank Heater select OFF
OR
when External Tank Heater is select and Tank heater ON
If tank temperature achieve tank thermo OFF, heat pump turn OFF, water pump turn OFF, room heater OFF and
3 ways valve switch to room side.
When tank temperature achieve heat pump ON condition, water pump ON, heat pump ON and room heater turn OFF.
