Panasonic WH-MXC16G9E8 Service Manual ▷ View online
45
12.1.5 Tank Mode Operation
Control contents:
3 ways valve direction
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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 and SOLAR turn ON condition.
Heat Pump Thermostat characteristic
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Water set temperature = Tank set temperature or [50°C] whichever lower.
o
Heat pump Water Outlet set temperature is set to [53°C] at tank mode.
Tank Thermo ON/OFF characteristic
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THERMO OFF TEMP:
1. THERMO OFF TEMP = Tank water set temperature + [0°C].
2. Tank temperature > THERMO OFF TEMP for continuous 10 seconds after heat pump OFF, water pump
2. Tank temperature > THERMO OFF TEMP for continuous 10 seconds after heat pump OFF, water pump
OFF or
3. Tank temperature > Tank set temperature + [2°C] for continuously 20 seconds.
o
THERMO ON TEMP:
1. THERMO ON TEMP = Tank water set temperature + [-2°C].
When detect tank temperature < THERMO ON TEMP, water pump ON for 3 minutes then heat pump ON.
When detect tank temperature < THERMO ON TEMP, water pump ON for 3 minutes then heat pump ON.
Characteristic of heat pump thermo ON/OFF under Tank Mode condition:
Water Outlet Thermo Condition
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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
Heat pump THERMO ON TEMP:
1. Heat pump THERMO ON TEMP = Water inlet during thermo OFF time + [-3°C].
2. Heat pump ON back when water outlet temperature < Heat pump THERMO ON TEMP.
2. Heat pump ON back when water outlet temperature < Heat pump THERMO ON TEMP.
Water Inlet Thermo Condition
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Heat pump THERMO OFF TEMP:
1. Water inlet temperature > 55°C for continuous 60 seconds, heat pump OFF.
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Heat pump THERMO ON TEMP:
1. Heat pump THERMO ON TEMP = Water inlet temperature < 55°C.
Booster heater control
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Booster heater turns ON and OFF follow normal operation.
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Booster heater turns ON condition:
1. During start up time (initialization), Booster heater turns ON after DELAY TIMER.
2. When tank temperature lower than HEATER ON TEMP.
3. 20 minutes from previous heater OFF.
2. When tank temperature lower than HEATER ON TEMP.
3. 20 minutes from previous heater OFF.
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Booster heater turns OFF CONDITION:
1. When tank temperature higher than tank set temperature for continuous 15 seconds.
Solar 3-way valve
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Solar pump operates follow solar operation specification.
2 way valve closes
Other
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Indoor backup heater cannot be ON during tank mode only.
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Tank Mode Tank set Temp. = 65°C
Tank side
Tank Thermo Off
On
Off
On
Off
3 ways valve
ID Water Pump
On
Off
Booster Heater
On
Off
Heat Pump
Booster Heater
Delay Time
Tank Mode (Solar Priority is not set)
On
Off
On
Off
3 ways valve
ID Water Pump
On
Off
Solar request
On
Off
Solar 3 way valve
On
Off
Booster Heater
On
Off
Heat Pump
Timer for Booster
heater turn On back
from previous off
Booster Heater
Delay Time
HeatPump Thermo Off
Tank Thermo Off
Tank Thermo On
Solar 3 way valve off eventhough solar request
on due to heat pump operates
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12.1.6 Heat + Tank Mode Operation
Setting 1: When Heating priority is set by control panel:
1. 3 ways valve control:
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3 ways valve switch to room side during External Room Thermo ON OR Solar 3 ways valve 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:-
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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.
o
During External Room Thermo ON time:
Switch 3 ways valve to tank side, IF
Under Solar Priority Set condition:
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Tank temperature < Tank THERMO ON TEMP AND Solar Valve OFF
Under Solar Priority Not Set condition:
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Tan temperature < Tank THERMO ON TEMP
Switch back 3 ways valve to room side, Heat pump and water pump turn OFF, IF
o
External Room Thermo ON back OR
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.
* Judge only after heat pump THERMO OFF
* THERMO ON and THERMO OFF point refer to case below.
* 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 [50°C] whichever lower.
Heat Pump Water Outlet set temperature is set to [53°C] during tank interval.
Initial Tank THERMO ON TEMP = heat pump tank target temperature + [-2°C].
Tank Thermo ON/OFF Characteristic
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THERMO OFF TEMP:
1. THERMO OFF TEMP = Heat pump tank target temperature + [0°C].
2. Tank temperature > THERMO OFF TEMP for continuous 10 seconds after heat pump OFF due to water
2. Tank temperature > THERMO OFF TEMP for continuous 10 seconds after heat pump OFF due to water
thermo, switch 3 ways valve to room side OR
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 = Heat pump tank target temperature + [2°C] or
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.
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Characteristic of heat pump thermo ON/OFF under tank side condition
Water Outlet Thermo condition
Water Outlet Thermo condition
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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 90 seconds, heat pump OFF
2. Water outlet temperature > Heat pump THERMO OFF TEMP for continuous 90 seconds, heat pump OFF
and water pump continue ON.
o
Next THERMO ON TEMP:
1. THERMO ON TEMP = Water inlet when heat pump THERMO OFF + [-3°C].
2. If water outlet temperature < THERMO ON TEMP AND External Room Thermo OFF, heat pump ON.
2. If water outlet temperature < THERMO ON TEMP AND External Room Thermo OFF, heat pump ON.
Water Inlet Thermo condition
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Heat pump THERMO OFF TEMP
1. Water inlet temperature > [55°C] for continuous 30 seconds, heat pump OFF, water pump continue ON.
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Next THERMO ON TEMP:
1. THERMO ON TEMP = Water inlet temperature <55°C.
2. If water inlet temperature < THERMO ON TEMP AND External Room Thermo OFF, heat pump ON.
2. If water inlet temperature < THERMO ON TEMP AND External Room Thermo OFF, heat pump ON.
Solar Operation Condition (Only during solar priority is set condition)
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When solar request ON, solar valve will ON, turn OFF heat pump and water pump and switch 3 ways valve to
room side.
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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, switch
2. If tank temperature < THERMO ON TEMP AND External Room Thermo OFF AND Solar 3WV OFF, switch
to tank side. Turn ON heat pump after water pump turns ON for 3 minutes.
3. Backup heater control:-
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During External Room Thermo ON time, follow normal backup heater control operation.
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During External Room Thermo OFF time, Backup heater OFF.
4. Booster heater control:-
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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:
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Solar 3 way valve operates follow solar operation specification.
* Under solar priority is et condition, when solar 3WV turns ON, booster heater will turns 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.
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2 way valve open.
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