Panasonic WH-MXC16G9E8 Service Manual ▷ View online
53
Start with tank
mode first
Room thermo
OFF
Tank thermo
OFF (End)
Heat pump
thermo OFF
Solar
request ON
Go in tank interval
only after solar OFF
Switch to tank heat-up
when room thermo OFF
Heat pump OFF at room
side when room thermo
OFF and high tank temp.
Booster heater OFF
after achieve
tank temp.
On
Off
On
Off
3 ways valve
On
Off
Room Thermo
On
Off
Backup Heater
On
Off
Booster Heater
Water Pump
On
Off
On
Off
Solar Valve
On
Off
2 ways valve
On
Off
Solar Request
Heat Pump
T1
T2
T2
T1
T1
T2
T2
T1 = Back up heater delay time
T2 = Booster heater delay time
T2 = Booster heater delay time
54
Heat + Tank Mode (Heating priority not set)
Under Solar Priority Not Set Condition:
Under Solar Priority Not Set Condition:
On
Off
Room Thermo
On
Off
On
Off
3 ways valve
On
Off
Backup Heater
On
Off
Booster Heater
Water Pump
On
Off
On
Off
Solar Valve
On
Off
2 ways valve
On
Off
Solar Request
Heat Pump
Start with tank
mode first
Tank thermo
OFF (End)
T1
T2
T1
T2
T1
T2
T2
Go in room interval
only after solar OFF
Heat pump
thermo OFF
Heat pump OFF at room
side when room thermo
OFF and high tank temp.
Solar
request ON
Booster heater OFF
after achieve
tank temp.
Solar valve close
when heat pump
switch to tank.
Room thermo
OFF
Switch to tank heat-up
when room thermo OFF
T1 = Back up heater delay time
T2 = Booster heater delay time
T2 = Booster heater delay time
55
12.1.7 Cool + Tank Mode Operation
12.1.7.1
Cooling Priority SET
1. 3 ways valve control:
3 ways valve switch to room side during External Room Thermo ON OR Tank Thermo OFF time, and switch to
tank side at External Room Thermo OFF AND Solar 3 ways valve OFF.
2. Heat pump operation control:-
During External Room Thermo ON time: (When room thermo ON heat pump must operate to room side).
Heat pump operates follow normal operation at room side.
During External Room Thermo OFF time:
a) Switch 3 ways valve to tank side, IF
Under Solar Priority Set condition:
Tank temperature > Tank THERMO OFF TEMP AND Solar Valve OFF.
Under Solar Priority Not Set condition:
Tank temperature < Tank THERMO ON TEMP.
b) Switch back 3 ways valve to room side, Heat pump and water pump turn OFF, IF
Under Solar Priority Set condition:
Tank temperature > Tank THERMO OFF TEMP for continuous 10 seconds OR Solar Valve ON.
Under Solar Priority Not Set condition:
Tank temperature > Tank THERMO OFF TEMP for continuous 10 seconds.
*THERMO ON and THERMO OFF point refer to case below.
Operation condition when 3 ways valve switch to tank side:
Tank water set temperature = tank set temperature or [55°C] whichever lower.
Heat Pump Water Outlet set temperature is set to 53°C.
Initial Tank THERMO ON TEMP = heat pump tank target temperature + [-2°C].
Tank Thermo ON/OFF characteristic
o
o
THERMO OFF TEMP:
1. THERMO OFF TEMP = Tank water set temperature + [0°C].
2. Tank temperature > THERMO OFF TEMP for continuous 10 seconds, switch 3 ways valve to room side.
3. Tank temperature > Tank set temperature + [2°C] for continuous 10 seconds, switch 3 ways valve to room
2. Tank temperature > THERMO OFF TEMP for continuous 10 seconds, switch 3 ways valve to room side.
3. Tank temperature > Tank set temperature + [2°C] for continuous 10 seconds, switch 3 ways valve to room
side.
o
Next THERMO ON TEMP:
1. THERMO ON TEMP = Tank water set temperature + [-2°C].
2. If tank temperature < THERMO ON TEMP AND External Room Thermo OFF, switch to tank side.
2. If tank temperature < THERMO ON TEMP AND External Room Thermo OFF, switch to tank side.
56
Characteristic of heat pump thermo ON/OFF under tank side condition
a) Water Outlet Thermo Condition
o
a) Water Outlet Thermo Condition
o
Heat pump THERMO OFF TEMP:
1. Heat pump THERMO OFF TEMP = [53°C] + [+4°C].
2. Water outlet temperature > Heat pump THERMO OFF TEMP for continuous 3 minutes, heat pump OFF.
2. Water outlet temperature > Heat pump THERMO OFF TEMP for continuous 3 minutes, heat pump OFF.
o
Next THERMO ON TEMP:
1. THERMO ON TEMP = Water inlet when heat pump thermo OFF + [-3°C].
2. When water outlet temperature < Heat pump THERMO ON TEMP, heat pump ON.
2. When water outlet temperature < Heat pump THERMO ON TEMP, heat pump ON.
b) Water Inlet Thermo Condition
o
Heat pump THERMO OFF TEMP:
1. Water inlet temperature > [55°C] for continuous 60 seconds, heat pump OFF.
o
Next THERMO ON TEMP:
1. THERMO ON TEMP = Water inlet temperature < 55°C.
c) Solar Operation Condition (Only under Solar Priority Set Condition)
o
o
When solar request ON, solar valve will ON and switch 3 ways valve to room side.
o
THERMO ON TEMP:
1. THERMO ON TEMP = Heat pump tank target temperature + [-2°C].
2. If tank temperature < THERMO ON TEMP AND External Room Thermo OFF AND Solar 3WV OFF,
2. If tank temperature < THERMO ON TEMP AND External Room Thermo OFF AND Solar 3WV OFF,
switch to tank side.
3. Backup heater control:-
o
Back-up heater does not operate at Cool + Tank Mode.
4. Booster heater control:-
o
Booster heater ON/OFF follow normal operation.
* Under solar priority is set condition, when solar 3 way valve is ON, booster heater turns OFF.
5. Solar 3 way valve:
o
Solar 3 way valve operates follow solar operation specification.
* Under solar priority is set condition, when solar 3WV turns ON, booster heater will turn OFF and 3 ways valve
switch to room side.
* Under solar priority is not set condition, solar 3WV will OFF when heat pump operates to tank side.
switch to room side.
* Under solar priority is not set condition, solar 3WV will OFF when heat pump operates to tank side.
6. 2 ways valve control:
o
2 ways valve is closed.
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