Temperature Control Parameter Setting And Etc - LG THERMA V Air-to-Water Heat Pump Installation Manual

Temperature Control Parameter Setting
• Function Code 21 : Setting Electric Heater On/Off temperature
Using Half capacity of electric heater : when DIP Switch No. 6 and 7 is set as ʻOFF-ONʼ :
- Value #1 : outdoor air temperature where half capacity of electric heater starts operation.
- Value #2 : not used.
- Example : If Value #1 is set as ʻ-1ʼ and DIP Switch No 6. and 7 is set as ʻOFF-ONʼ, then half
capacity of electric heater will start operation when outdoor air temperature is below -1°C and
current leaving water temperature or room air temperature is much belower than target leaving
water temperature or target room air temperature.
Using Full capacity of electric heater : when DIP Switch No. 6 and 7 is set as ʻOFF-OFFʼ :
- Value #1 : base outdoor air temperature.
- Value #2 : temperature gap (it means ʻhow much colder than base outdoor air temperature?ʼ)
- Example : If Value #1 is set as ʻ-1ʼ and Value #2 is set as ʻ3ʼ and DIP Switch No 6. and 7 is set as
ʻOFF-OFFʼ, then full capacity of electric heater will start operation when outdoor air temperature is
below -4°C (-4 = Value #1 – Value #2) and current leaving water temperature or room air
temperature is far much belower than target leaving water temperature or target room air
temperature.
• Function Code 22 : Setting Cut-off Temperature in Cooling Mode (FCU setting included)
Determine leaving water temperature when the product is turned off. This function is used fr
preventing condensation on the floor in cooling mode.
- Value #1 : cut-off temperature. Value #1 is valid when Value #2 is ʼ01 (that means, FCU is
installed)ʼ.
- Value #2 : determines if FCU is installed or not. ʼ01ʼ means ʻFCU is NOT installedʼ, and ʼ00ʼ means
ʻFCU is installed.ʼ
- Example : If Value #1 is set as ʻ10ʼ and Value #2 is ʼ01ʼ and actually FCU is NOT installed in the
water loop, the product stop operation in cooling mode when the leaving water temperature is
below 10 °C.
- Example : If Value #1 is set as ʻ10ʼ and Value #2 is ʼ00ʼ and actually FCU is installed in the water
loop, the Value #1 is not used and the product do NOT stop operation in cooling mode when the
leaving water temperature is below 10 °C.
FCU Installation
• If FCU is used, related 2way valve should be installed and connected to the indoor unit PCB.
• If Value #2 is set as ʼ00ʼ but FCU or 2way valve is NOT installed, the product can abnormal
operation.
Function Code 23 and 24 : Setting Weather-dependent operation Mode
System Set-Up
Installation Manual 83