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Temperature Control Parameter Setting and Etc
• Function Code 22 : Setting Cut-off Temperature in Cooling Mode (FCU setting included)
Determine leaving water temperature when the unit is turned off. This function is used for
preventing condensation on the floor in cooling mode.
- Value #1 : cut-off temperature. Value #1 is valid when Value #2 is ʼ00 (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 unit stops operation in cooling mode when the leaving water
temperature is below 10°C(50°F).
- Example : If Value #1 is set as ʻ10ʼ and Value #2 is ʼ00ʼ and actually FCU is installed in the water
loop, the unit does NOT stop operation in cooling mode when the leaving water
temperature is below 10°C(50°F).
NOTICE
FCU Installation
• If FCU is used, 2way valve should be installed and connected to the Main PCB assembly 1.
• If Value #2 is set as ʼ00ʼ but FCU or 2way valve is NOT installed, the unit may not operate
normally.
• Function Code 23, 24, and 25 : Setting Weather-dependent operation
Weather-dependent operation is that the unit automatically adjusts target temperature (leaving
water or room air) according to the outdoor air temperature.
- Value #1 and Value #2 of Function Code 23 : range of outdoor air temperature
- Value #1 and Value #2 of Function Code 24 : range of auto-adjustable target room air temperature
- Value #1 and Value #2 of Function Code 25 : range of auto-adjustable target leaving water
Note : Weather-dependent operation is applied for heating mode only.
Auto-Adjustable
Target Temperature
Value #1 of
Function Code
24 or 25
Value #2 of
Function Code
24 or 25
temperature
Value #2 of
Function Code 23
Function Code 23
Temperature profile
of Weather-dependent
operation
Outdoor
Value #1 of
air temperature
Hydro Kit Installation Manual 47
System Set-Up
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