52
Hydro Kit
System Set-Up
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 prevent-
ing condensation on the floor in cooling mode.
- Value #1 : cut-off temperature. Value #1 is valid when Value #2 is ’01
(that means, FCU is NOT installed)’.
- Value #2 : determines if FCU is installed or not. ’01’ means ‘FCU is NOT installed’, and ’00’ means
‘FCU is installed.’
- Example : If Value #1 is set as ‘10’ and Value #2 is ’01’ and actually FCU is NOT installed in the
water loop, the unit stops operation in cooling mode when the leaving water tempera-
ture is below 10°C(50°F).
- Example : If Value #1 is set as ‘10’ and Value #2 is ’00’ and actually FCU is installed in the water
loop, the unit does NOT stop operation in cooling mode when the leaving water tem-
perature is below 10°C(50°F).
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 ’00’ but FCU or 2way valve is NOT installed, the unit may not operate nor-
mally.
NOTICE
• 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 tem-
perature
Note :
Weather-dependent operation is applied for heating mode only.
Value #2 of
Function Code 23
Value #1 of
Function Code 23
Auto-Adjustable
Target Temperature
Outdoor
air temperature
Temperature profile
of Weather-dependent
operation
Value #1 of
Function Code
24 or 25
Value #2 of
Function Code
24 or 25
Summary of Contents for ARNH04GK2A2
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