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8-3.
6-3) Control method
Hydro Unit Control
• The water temperature setting at starting operation is 40 °C (FC_9D) at heating and 20 °C (FC_96) at cooling.
If the temperature setting calculated by Auto curve at starting operation will be used instead of the fixed
temperature 40 °C (FC_9D), FC_B5 should be set to "1".
• The target water outlet temperature is adjusted by 1deg every 30 minutes based on the TSC_rc, the temperature
setting on the remote controller, and the room temperature (temperature indicated on the remote controller: T_rc).
The adjustable range of water temperature is set with FC18-1B.
• The temperature set on the remote controller and actual room temperature may differ depending on the place of
the remote controller or room space. In that case, adjust temperature detection using FC02 (for heating) and FC03
(for cooling) on the remote controller.
Warm-mode
TSC_rc+2K
TSC_rc+1K
TSC_rc
TSC_rc-0.5K
How to shift up/down the temperature by remote controller FC02, 03
• Ambient temperature (remote controller) is higher than room temperature: example. 1deg
Change remote controller FC02, 03 = "-1K" to "-2K"
• Ambient temperature (remote controller) is lower than room temperature: example. 1deg
Change remote controller FC02, 03 = "-1K" to "0"
T_rc
D zone
C zone
B zone
A zone
A' zone
Related FC
FC No.
02 (Remote controller) Room temperature correction (at heating)
03 (Remote controller) Room temperature correction (at cooling)
Operation flow and applicable data, etc.
A' zone:Thermo off
A zone:Thermo off
B zone:Down water temp
C zone:Keep water temp
D zone:Up water temp
Correction control
Heating
Setting is corrected upward
Water temperature setting is up by 1deg every 30
minutes.
No correction
Setting is corrected downward.
Water temperature setting is down by 1deg every 30
minutes.
Thermo off. But if inlet water detect less 25 °C, then
heat pump restart.
Setting is corrected downward.
Water temperature setting is down by 1deg every 39
minutes.
Thermo off
18
Upper limit of cooling temperature setting
19
Lower limit of cooling temperature setting
1A
Upper limit of heating temperature setting (Zone 1)
1B
Lower limit of heating temperature setting (Zone 1)
40
Room temperature control
Initial water temperature setting when controlling
96
cooling by the room temperature remote controller and
room temperature thermostat
Initial water temperature setting when controlling
9D
heating by the room temperature remote controller and
room temperature thermostat
B2
Heat pump restart water condition in A zone.
Choose of the initial setting temperature.
Either use the temperature set in FC_9D, or use the
B5
temperature calculated by Auto curve.
This applies heating operation only.
Cool-mode
TSC_rc+0.5K
TSC_rc
TSC_rc+0K
TSC_rc-1.0K
Cooling
Setting is corrected upward
Water temperature setting is down by 1deg every 30
minutes.
No correction
Setting is corrected downward.
Water temperature setting is down by 1deg every 30
minutes.
Thermo off
Setting item
61
D zone:Down water temp
C zone:Keep water temp
B zone:Up water temp
A zone:Thermo off
Default
Variable range
25
18-25 °C
7
7-18 °C
60
37-60 °C
20
20-37 °C
0
0:Not permitted 1:Permitted
20
10-25 °C
40
20-60 °C
-1
-10K - +10K, 1K step
-1
-10K - +10K, 1K step
25
20-37 °C
0 : Use the temperature
set in FC_9D
0
1 : Use the temperature
calculated by Auto curve
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