Panasonic WH-SXC09H3E8 - Page 109

109
12.1.8 Tank Mode Operation
 3 ways valve direction
o 3 ways valve switch to tank side during Tank Thermo ON condition. Switch 3 ways valve to room side
when tank achieve Tank Thermo OFF temperature.
 Tank Thermo ON/OFF Characteristic
o Tank Thermo OFF
Case 1: Internal Tank Heater is select and Tank Heater ON
a) Tank temperature > Tank Set Temperature continuously for 15 seconds.
b) Water outlet >75°C
Case 2: Tank Heater OFF OR External Heater is select
a) When heat pump OFF due to water thermos & Tank temperature > Tank water set temperature for
continuously 20 seconds. OR
b) Tank temperature > Tank set temperature + 1°C for continuously 20 seconds.
o Tank Thermo ON
Case 1: Internal Tank Heater is select and Tank Heater ON
a) Tank temperature < Tank set temperature + R/C (Tank re-heat temperature)
Case 2: Tank Heater select OFF OR External Heater is select
a) Tank temperature < Tank water set temperature + 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 51°C whichever lower.
 2 ways valve close
 Heat pump Thermostat Characteristic
o Heat pump Water Outlet set temperature is set to below table:
Outdoor ambient temperature Heat pump water outlet temperature
< 5°C 55°C
> 5°C 57°C
Characteristic of heat pump thermos ON/OFF under tank mode condition:
1) Water Outlet Thermo Condition
- Heat pump thermos OFF temperature:
1. Heat pump thermo OFF temperature = Target Water outlet temperature + (2°C)
2. Water outlet temperature > heat pump thermo OFF temperature for continuously 3 minutes, 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.
2) Water inlet thermo protection condition
- Heat pump thermo OFF temperature:
1. Water inlet temperature > [57°C/55°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 < [57°C/55°C].
Outdoor ambient temperature Water inlet temperature
< 5°C 55°C
>= 5°C 57°C