Panasonic WH-SDC14C9E8 / WH-UD14CE8 [51/141] Heat tank mode operation

12.1.7 Heat + Tank Mode Operation

Setting 1: When Heating priority is set by control panel:

1 3 ways valve control:

o 3 ways valve switch and fix to room side.

2 Heatpump operation control:

o Heatpump operate follow normal operation

3 Backup Heater control:

o Backup heater operate follow normal operation

4 Booster heater control:

o Booster heater On/Off follow normal operation

5 Solar 3 way valve:

o Solar 3 way valve operates follow solar operation specification.

6 2 ways valve control:

o 2 ways valve opens.

* Under solar priority is set condition, when solar 3 way valve is ON, booster heater turn OFF

Setting 2: When heating priority is not set by control panel:

 When Solar Priority is set/not set by control panel:

1 3 ways valve control:

o 3 ways valve switch to room side during heating heat-up interval, and switch to tank side during tank

heat-up interval. Both mode will switch alternatively.

2 Heatpump operation control:

a. During heating heat-up interval

o Follow normal heating operation.

Under solar priority set condition:

- Always detect the tank temperature after heating heat-up interval. Switch only to tank heat-up

interval and start counting tank heat-up timer when tank temperature < THERMO ON TEMP AND

solar 3WV OFF

Under solar priority not set condition:

- Always detect the tank temperature after heating heat-up interval. Switch only to tank heat-up

interval and start counting tank heat-up timer when tank temperature < THERMO ON TEMP

* THERMO ON TEMP is defined form following Case1 to Case4.

b. During tank heat-up interval

o Heatpump tank target temperature = Tank set temperature or [55°C] whichever lower

o Heatpump Water Outlet set temperature is set to Maximum (55°C) during tank interval

Case 1:

o THERMO OFF TEMP:

1. THERMO OFF TEMP = Heatpump tank target temperature + [+2°C].

2. Tank temperature > THERMO OFF TEMP for continuous 3 minutes, switch 3 ways valve to room side.

End Tank heat-up interval and start count heating heat-up interval.

o THERMO ON TEMP:

1. THERMO ON TEMP = Heatpump tank target temperature + [-3°C].

2. After Heating heat-up interval, always detect tank temperature. Switch to next tank heat-up interval

when tank temperature < THERMO ON TEMP.