Panasonic WH-MXF09D3E8 Service Manual page 47

i. 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.
•
Next THERMO ON TEMP:
1. THERMO ON TEMP = Heat pump tank target temperature + [-3°C].
2. If tank temperature < THERMO ON TEMP AND External Room Thermo OFF, switch to tank side.
ii. Case 2
•
Heat pump THERMO OFF TEMP:
1. Heat pump THERMO OFF TEMP = 53°C + [+4°C].
Water outlet temperature > Heat pump THERMO OFF TEMP for continuous 3 minutes, switch 3
o
ways valve to room side.
•
Next THERMO ON TEMP:
1. THERMO ON TEMP = Tank temp. when heat pump thermo off + [-3°C].
2. If tank temperature < THERMO ON TEMP AND External Room Thermo OFF, switch to tank side.
iii. Case 3
•
Heat pump THERMO OFF TEMP:
1. Water inlet temperature > 55°C for continuous 60 sec, switch 3 ways valve to room side.
•
Next THERMO ON TEMP:
1. THERMO ON TEMP = Tank temp. when heat pump thermo off + [-3°C].
2. If tank temperature < THERMO ON TEMP AND External Room Thermo OFF, switch to tank side.
iv. Case 4 (Only during solar priority is set condition)
When solar request ON, solar valve will ON and switch 3 ways valve to room side.
•
THERMO ON TEMP:
1. THERMO ON TEMP = Heat pump tank target temperature + [-3°C].
2. If tank temperature < THERMO ON TEMP AND External Room Thermo OFF AND Solar 3WV OFF,
switch to tank side.
3. Backup Heater control:-
•
During External Room Thermo ON time, follow normal backup heater control operation.
•
During External Room Thermo OFF time, Backup heater OFF.
4. Booster heater control:
•
Booster heater ON/OFF follow normal operation.
* Under solar priority is set condition, when solar 3 way valve is ON, booster heater turn OFF.
5. Solar 3 way valve:
•
Solar 3 way valve operates follow solar operation specification.
* Under solar priority is set condition, when solar 3WV turn ON, booster heater turn OFF and 3 ways valve
switch to room side.
* Under solar priority is not set condition, solar 3WV will OFF when heat pump operate to tank side.
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. Tank mode is the Initial running mode of this heat + tank mode
(heating no priority).
47