131
Time from start (minutes) Below 20 minutes Below 40 minutes Below 60 minutes Above 60 minutes
Coefficient 0.5 0.5 + (0.5/3) 0.5 + 2*(0.5/3) 1.0
The operating frequency will gradually increase when the capacity is deemed insufficient by referring to dRange
value:-
dRange = Current water outlet temperature - Water outlet set temperature
dRange value is checked every 10 minutes.
If current dRange < previous dRange, the new coefficient value will increase by 0.1.
Maximum frequency after change is limited by Zone limit maximum Hz.
Stop condition
When any one of below conditions achieved
Remote control setting = Comfort
It is test mode
Compressor run time ≥ 1 hour
Present water outlet temperature - Water outlet set temperature < -10°C
Outdoor ambient < -10°C
14.1.3 Cooling Operation
14.1.3.1 Thermostat Control
Compressor is OFF when Water Outlet Temperature – Internal Water Setting Temperature > -1.5°C for
continuously 3 minutes.
Compressor is ON after waiting for 3 minutes, if the Water Outlet Temperature – Water Inlet Temperature
(temperature at thermostat OFF is triggered) >3°C.
14.1.3.2 Cool Mode Operation
1. ways valve control:
o 3 ways valve switch and fix to cooling side.
2. Heat pump operates follow normal cooling operation.
3. Room heater DOES NOT operate during cool mode.
4. 2 ways valve control:
o 2 ways valve is closed.
14.1.4 Target Water Temperature Setting
14.1.4.1 Target Water Temperature Control of Standard System (Optional PCB not
connected)
There are 2 types of temperature control selection which are Compensation and Direct.
Temperature control type selection by installer:
1 Compensation : Wlo, WHi, ODLo, ODHi can be set at installer menu.
2 Direct : Direct Water Temperature Set
Remote control setting by user:
1 Compensation : Shift value ±5°C from the compensation curve
2 Direct : Direct water temperature set change
*This setting only able to set when room sensor select as Water Temperature.
*Instead of water temperature, user will set target room temperature when room sensor select as Room Thermistor
OR Internal Room Thermostat.
Target water temperature is calculated as below condition.
o Target 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