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101
12.1.6.2 Target Zone 2 water temperature setting control
Start
condition
o Heating zone 2 is ON by remote control or Timer or Auto Mode OR
o Cooling zone 2 is ON by remote control or Timer or Auto Mode.
o Cooling zone 2 is ON by remote control or Timer or Auto Mode.
Cancel
condition
o Heating zone 2 is OFF by remote control or Timer or Auto mode AND
o Cooling zone 2 is OFF by remote control or Timer or Auto mode.
o Cooling zone 2 is OFF by remote control or Timer or Auto mode.
Target Zone 2 water temperature is calculated as below condition.
o Target Zone 2 water temperature = A (Base temperature) + B (shift temperature)
A (Base Temperature)
Compensation Direct
Value from the curve + User shift value set
Direct value from user setting
* During heat mode and compensation select, if powerful mode is activated, higher value of WLo or WHi will be use
as curve value.
o B (shift temperature) value is depend on the room sensor selection at remote controller as below table:
B (Shift Temp.)
B shift value depend on the room sensor selection at remocon as table below
Sensor selection
Water temperature
B = 0
External Room thermostat
B = 0
Internal Room thermostat &
Room thermistor
Room thermistor
Cool Mode:
B = 0 ; when Zone OFF or Zone Room Thermo OFF
B = B = 1* (room set temp (R/C) - actual room temp)
Max/Min Regulation of B: (Max = 5 ; Min = -5)
Heat Mode:
B = 0 ; when Zone OFF or Zone Room Thermo OFF
B = follow Heating Room Temperature PI control logic
B = 0 ; when Zone OFF or Zone Room Thermo OFF
B = B = 1* (room set temp (R/C) - actual room temp)
Max/Min Regulation of B: (Max = 5 ; Min = -5)
Heat Mode:
B = 0 ; when Zone OFF or Zone Room Thermo OFF
B = follow Heating Room Temperature PI control logic
Pool Function Selected
B = Delta value setting from remocon
* B = 0 regardless of which sensor selection, if SHP control bit is enable except Pool function select (maintain Pool
“B” value)
** Pool function also can be select at Zone 2 when optional PCB is connected and Zone 2 system is select.
Maximum/minimum regulation of Target Water Temperature.
Heating
Cooling
Max 55°C 20°C
Min 20°C 5°C
Target Zone 2 Water Temperature (Heat mode only) during SG ready control
o If buffer tank selection is “NO” then following shift is carried out.
While digital input is “10” or “11” then,
Final Target Zone 2 water temperature
= Target Zone 1 water temperature* (SG ready % setting (remote control menu))%
= Target Zone 1 water temperature* (SG ready % setting (remote control menu))%
o If buffer tank selection is “YES”
No shift of Target Zone 2 Water Temperature. Target Buffer Tank Temperature will change accordingly.
* Refer to “Buffer tank temperature control”
102
12.1.6.3 Zone Temperature Control Contents
During Standard System (Optional PCB not connected)
o Only 1 zone temperature control is available
o This zone room temperature is control by either one of the 4 room sensor (Room Th, Int/Ext Room
o This zone room temperature is control by either one of the 4 room sensor (Room Th, Int/Ext Room
Thermostat, Water temperature)
o Target Zone Water Temperature is calculated based on selected temperature control type (Compensation or
Direct) and selected room sensor. Target Water Temperature will set same as Target Zone Water
Temperature
Temperature
o Target Water Temperature is the temperature for heat pump to operate refer to indoor water outlet sensor.
o Heat pump and water pump OFF when ROOM Thermo OFF (Zone thermo OFF by Room Th or Room
o Heat pump and water pump OFF when ROOM Thermo OFF (Zone thermo OFF by Room Th or Room
Thermostat).
* There will be no zone sensor connected to zone 1 (No zone sensor error), mixing valve and zone pump will not
operate.
operate.
During Extension System (Optional PCB connected)
Buffer Tank connection select "NO" &
o One zone system is select
This zone room temperature control by either one of the 4 room sensor (Room Th, Int/Ext Room
Thermostat, Water temp.)
Target Zone Water Temperature calculate base on selected temperature control type (Compensation or
Direct) and selected room sensor.
Target Water Temperature will set same as Target Zone Water Temperature
Target Water Temperature is a temperature for heat pump to operate refer to indoor water outlet sensor.
Heat pump and water pump OFF when ROOM Thermo OFF (Zone thermo OFF by Room Th or Room
Thermostat).
* There will be no zone sensor connected to zone 1 (No zone sensor error), mixing valve and zone pump will not
operate.
operate.
o 2 zone system select
Each zone room temperature is control by each sensor which select from either one of the 4 room sensor
Target Zone 1 & 2 Water Temperature is calculated based on selected temperature control type
(Compensation or Direct) and selected room sensor.
* Zone Mixing Valve & Zone pump will operate to achieve Target Zone Water Temperature which refer to
zone sensor.
* Zone Sensor will detect if zone sensor is open or short.
* Zone Mixing Valve & Zone pump will operate to achieve Target Zone Water Temperature which refer to
zone sensor.
* Zone Sensor will detect if zone sensor is open or short.
Target Water Temperature will set same as the active & higher zone water temperature setting. (When
cooling mode, lower zone water temp setting)
Target Water Temperature is the temperature for heat pump to operate refer to indoor water outlet
sensor.
Heat pump and water pump OFF when ROOM Thermo OFF (Both Zone thermo OFF by Room Th or
Room Thermostat).
Buffer Tank Connection select "YES" &
o 1 zone system or 2 zone system select
Each zone control by each sensor which select from either one of the 4 room sensor
Target Zone 1 & 2 Water Temperature calculate base on selected temperature control type
(Compensation or Direct) and selected room sensor. Each zone have their own Target Zone Water
Temperature.
* Zone Mixing Valve & Zone pump will operate to achieve each Target Zone Water Temperature which
refer to zone sensor
* Zone Sensor will detect if zone sensor is open or short.
Temperature.
* Zone Mixing Valve & Zone pump will operate to achieve each Target Zone Water Temperature which
refer to zone sensor
* Zone Sensor will detect if zone sensor is open or short.
Target Buffer Tank Temperature will be set as active & higher zone water temperature setting + Buffer
Delta T. (Heating) Target Buffer Tank Temperature will be set as active & lower zone water temperature
setting (Cooling).
setting (Cooling).
Target Water Temperature will set as Target Buffer Tank Temperature + [2°C] (Heating) Target Water
Temperature will set as Lower or Active Target Zone Water Temp. + [-3°C] (Cooling)
Target Water Temperature is a temperature for heat pump to operate refer to indoor water outlet sensor.
Heat pump and water pump OFF when ROOM thermo OFF
Heat mode: ROOM thermo OFF (Buffer Tank Temperature
>
Target Buffer Tank + [0°C]
Cool mode: ROOM Thermo OFF (Both Zone thermo OFF by Room Th or Room Thermostat)
103
12.1.7 Auto Mode Operation
Outdoor Ambient
Cool To Heat
Setting Temp.
COOL
MODE
HEAT
MODE
Heat To Cool
Setting Temp.
Control
details:
o To enable the unit to operate either heat or cool mode automatically, heat to cool set temperature and
cool to heat set temperature can be set by control panel.
o Automatic operation is judged based on control panel setting temperature and outdoor ambient
temperature.
* Minimum setting of heat to cool set temperature is 1°C higher than cool to heat set temperature.
Judgement
control:
o If outdoor ambient temperature < Heat to Cool Set Temperature, unit will operate in Heat Mode or else
the unit will operate in Cool Mode.
o If current operation is Cool mode, outdoor ambient temperature > Cool to Heat Temperature, unit will
maintain Cool mode operation or else the unit will operate Heat mode.
o If current operation is Heat mode, outdoor ambient temperature > Heat to Cool Temperature, unit will
maintain Heat mode operation or else the unit will operate Cool mode.
o Every 60 minutes the outdoor ambient temperature is judged.
o When Auto + Tank mode is selected, operation mode switching is judged by both outdoor ambient
o When Auto + Tank mode is selected, operation mode switching is judged by both outdoor ambient
temperature and indoor air temperature.
12.1.8 Auto Cooling Mode Operation Limit
16°C
Compressor
ON
Compressor
OFF
Outdoor Ambient
Temperature
Temperature
19°C
Auto Mode Cooling Only operation will start once the outdoor ambient temperature reaches 19°C and
compressor will continue to run until the outdoor ambient temperature drops to 16°C.
Due to this limitation,
If Heat to Cool temperature is set lower than 19°C, the compressor will not operates until the outdoor
ambient temperature reaches 19°C or higher.
ambient temperature reaches 19°C or higher.
12.1.9 Tank Mode Operation
3 ways valve direction
o 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.
Tank Thermo ON/OFF Characteristic
o Tank Thermo OFF
Case 1: Internal Tank Heater is select and Tank Heater ON
o Tank temperature > Tank Set Temperature continuously for 15 seconds.
o Water outlet >75°C
o Tank temperature > Tank Set Temperature continuously for 15 seconds.
o Water outlet >75°C
104
Case 2: Tank Heater OFF OR External Heater is select
o When heat pump OFF due to water thermos & Tank temperature > Tank water set temperature for
continuously 20 seconds. OR
o Tank temperature > Tank set temperature + 1°C for continuously 20 seconds.
o Tank Thermo ON
Case 1: Tank Heater ON (Internal Tank Heater)
o Tank temperature < Tank set temperature + R/C (Tank re-heat temperature)
o Tank temperature < Tank set temperature + R/C (Tank re-heat temperature)
Case 2: Tank Heater OFF (Internal Tank Heater)
o Tank temperature < Tank water set temperature + R/C (Tank re-heat temperature)
* When tank thermo ON, water pump will ON for 3 minutes then only heat pump turn ON.
* Tank water set temperature = tank set temperature or 51°C whichever lower.
* Tank water set temperature = tank set temperature or 51°C whichever lower.
2 ways valve close
Heat pump Thermostat Characteristic
o Heat pump Water Outlet set temperature is set to below table:
Outdoor ambient temperature
Heat pump water outlet temperature
< 5°C
55°C
> 5°C
57°C
Characteristic of heat pump thermos ON/OFF under tank mode condition:
Water Outlet Thermo Condition
Heat pump thermos OFF temperature:
1 Heat pump thermo OFF temperature = Target Water outlet temperature + (2°C)
2 Water outlet temperature > heat pump thermo OFF temperature for continuously 3 minutes, heat pump OFF
2 Water outlet temperature > heat pump thermo OFF temperature for continuously 3 minutes, heat pump OFF
but water pump continue ON.
Heat pump thermo ON temperature:
1 Heat pump thermo ON temperature = water inlet during thermo OFF time + [-3°C]
2 When water outlet temperature < heat pump thermo ON temperature, heat pump ON.
2 When water outlet temperature < heat pump thermo ON temperature, heat pump ON.
Water inlet thermo protection condition
Heat pump thermo OFF temperature:
1 Water inlet temperature > [57°C/55°C] for continuously 30 seconds, heat pump OFF, water pump continue
ON.
Heat pump thermo ON temperature:
1 Heat pump thermos ON temp = water inlet temperature < [57°C/55°C].
Outdoor ambient temperature
Water inlet temperature
< 5°C
55°C
>= 5°C
57°C
Thermo ON/OFF for Heat Pump in Tank Operation:
When tank temperature achieve heat pump OFF condition, refer below condition:
Condition 1: Tank Heater ON (Internal Tank Heater)
Heat pump will turn OFF, water pump continue ON and room heater will continue ON if tank temperature below
tank heater thermo ON condition. 3 ways valve will only switch to room side after tank temperature reach tank
heater thermo OFF condition.
heater thermo OFF condition.
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