97
Heat pump OFF condition at Tank Mode
o
Tank temperature > tank water set temperature continuously for 20 seconds after heat pump thermos OFF
due to water thermo. (Heat pump turn OFF but water pump continue ON and room heater turn ON to achieve
tank set temperature)
OR
o
Tank temperature > tank set tempe [1°C] for continuously 20 seconds. (Heat pump OFF, water pump
OFF, room heater OFF and 3 ways valve switch to room side)
Heat pump ON condition at Tank Mode
o
Tank temperature < tank water set tempe R/C setting (Tank re-heat temp)
(Water pump turn ON OR continue ON, heat pump ON and 3 ways valve switch to tank side or maintain at
tank side)
Internal heater control
Internal heater only operates to tank side if the Internal Tank Heater is select, Tank heater ON and backup heater
is enable.
Internal heater turn ON condition:
Tank temperature < tank set temperature
AND
Heat pump thermos OFF
AND
20 minutes from previous heater off
AND
Internal tank heater selects USE from control panel.
Internal heater turn OFF condition:
Tank temperature > tank set temperature for continuously 15 seconds
OR
Heat pump thermo ON
OR
Mode change or operation is off by control panel.
External Heater control
External heater only operate to tank side if tank heater ON & External Heater select.
13.1.10 Heat + Tank Mode Operation
1 3 ways valve control:
o
3 ways valve switch to room side during room heat-up interval and switch to tank side during tank heat-
up interval. Both modes will switch alternately. Tank mode is the initial running mode of Heat + Tank
mode.
2 Heat pump operation control:
o
During room heat-up interval
Follow normal heating operation.
Switching to tank side depends to below cases:
Case 1:
[Previous switch from tank interval to room interval due to thermo OFF]
Switch to tank heat-up interval when Tank temp < Tank thermos ON temp (Room heat-up interval
ends)
Case 2:
[If heating operation at room side is less than 30 minutes and switch to tank side 3 times
consecutively]
Maintain at room heat-up 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 due to tank interval timer is complete]
Maintain at room heat-up 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.
