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12.1.11 Cool + Tank Mode Operation
1. 3 ways valve control:
-
3 ways valve switch to room side during room cooling interval and switch to tank side during tank heat-up
interval. Both mode will switch alternately. Tank mode is the initial mode of cool + tank mode.
2. Heat pump operation control:
a) During room operation interval
-
Follow normal cooling operation.
Switch to Tank side depends on below case:
Case 1:
[Previous switch from tank interval to room interval is due to tank thermo OFF.]
-
Switch to tank heat-up interval when Tank temperature < Tank Thermo ON temperature (Room interval will
ends)
Case 2:
[If cooling operation at room side is less than 30 minutes and switch to tank side for 3 times consecutively]
-
Maintain at room cooling interval regardless of the tank temperature. Switch to tank heat-up interval only
when (Room interval timer is complete
OR
Room heat pump thermo OFF)
AND
Tank temperature < Tank
thermo ON temperature.
Case 3:
[Previous switch from tank interval to room interval is due to tank interval timer is complete]
-
Maintain at room cooling interval regardless of the tank temperature. Switch to tank heat-up interval only
when (Room interval timer is complete
OR
Room heat pump thermo OFF)
AND
Tank temperature < Tank
thermo ON temperature.
*Tank Thermo ON temperature:
Internal Tank Heater
select USE
<Tank set tempe R/C setting (Tank re-heat temperature)
Others
<Tank water set tempe R/C setting (Tank re-heat temperature)
b) During tank heat-up interval
-
Tank interval is the first mode running when the cool + tank mode is select.
-
Switch to room interval only when tank achieve tank thermo OFF
OR
tank heat-up interval timer is complete.
-
Heat pump operates according to normal tank mode operation.
3. Room heater control:
a) During room cooling interval
-
Room heater is OFF and not operates.
4. Tank heater control:
a) During room cooling interval
i.
If external tank heater is select.
-
External heater ON/OFF according to external tank heater operation control.
ii.
If internal tank heater is select and tank heater ON
-
Internal tank heater will not function under room cooling interval.
b) During tank heat-up interval
i.
If external tank heater is select
-
Once room cooling interval switch to tank heat-up interval, tank heater will turn OFF and tank heater
delay timer will start counting.
-
Tank heater turns ON after tank heater delay timer is fulfill and tank temperature is lower than tank
set temperature.
-
Tank heater delay timer is clear when switch to room cooling interval.
ii.
If internal tank heater is select and tank heater ON.
-
Internal tank heater will turn ON after heat pump thermos off to boil tank temperature to tank set
temperature.