Gree GRS-CQ6.0Pd/Na-K Service Manual page 31

AIR-TO-WATER HEAT PUMP
25 to 55 . The high temperature cycle suitable for FCU or radiator is equipped
℃ ℃
in the water loop.
If code 19 is set as 1, in space heating， the unit will be operated by low temperature
cycle. The setting value of outflow water temperature ranges from 25
low temperature cycle suitable for under-floor coil is equipped in the water loop.
Function code 20 ：Setting startup temperature of back-up heater（indoor
unit）
Set the outdoor air temperature when half capacity of electric heater starts
operating.
Example : If Value is set as '-1'：
Half capacity of electric heater will start operating when outdoor air temperature is
below -1°... and current outflow water temperature or room air temperature is much
lower than target outflow water temperature or target room air temperature.
Function code 21 ：Setting maximum water tank temperature heated by heat
pump cycle
Set the maximum temperature generated by AWHP compressor cycle.
Example : If Value is set as '50'：
If the target water tank temperature is 60 , and when the current water tank
temperature is below 50 , the water tank is heated by heat pump. When current
water tank temperature is higher than 50
temperature (in this case is 60 ), the water tank is heated by water heater in tank
Function code 22 ：Setting heating temperature of disinfection operation
Set the target temperature of disinfection operation.
Disinfection operation is special sanitary tank operation mode to kill and to prevent
growth of viruses inside the tank.
Before set this function, the value of code 6 should be set as 1.
Function code 23, 24: Setting the range of weather-dependent operation
Weather-dependent operation is that the unit automatically adjusts target
temperature (outflow water or room air) according to the outdoor air temperature.
Value of code 23: Lower limit of the outdoor air temperature;
Value of code 24: Upper limit of the outdoor air temperature;
Function code 25: Setting temperature gap from target temperature of
Set the temperature gap from target temperature (outflow water or room air) in
℃
℃
℃
℃
cooling operation
but lower than target
CONTROL
to 45
℃ ℃，
water tank
27