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13.1.7. Heat + Tank Mode Operation
Setting 1:- When Heating priority is set by control panel:
1. 3 ways valve control:
• 3 ways valve switch and fix to room side.
2. Heat pump operation control:-
• Heat pump operate follow normal operation
3. Backup Heater control:-
• Backup heater operate follow normal operation
4. Booster heater control:
• Booster heater On/Off follow normal operation
5. Solar 3 way valve:
• Solar 3 way valve operates follow solar operation specification.
6. 2 ways valve control:
• 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:
• 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. Heat pump operation control:
a. During heating heat-up interval
• 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
• Heat pump tank target temperature = tank set temperature or [55°C] whichever lower
• Heat Pump Water Outlet set temperature is set to Maximum (55°C) during tank interval
Case 1:
• THERMO OFF TEMP:
1. THERMO OFF TEMP = Heat pump 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.
• THERMO ON TEMP:
1. THERMO ON TEMP = Heat pump tank target temperature + [-3°C].
2. After Heatng heat-up interval, always detect tank temperature. Switch to next tank heat-up interval when tank temper-
ature < THERMO ON TEMP.
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