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7-3.
Hydro Unit Control
6-3) Control method
• The water temperature setting at starting operation is 40°C (DN_9D) at heating and 20°C (DN_96) at cooling.
If the temperature setting calculated by Auto curve at starting operation will be used instead of the fixed
temperature 40°C (DN_9D), DN_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 DN_18 ~ 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 DN_02 (for heating) and
DN_03 (for cooling) on the remote controller.
How to shift up/down the temperature by remote controller DN_02, 03
• Ambient temperature (remote controller) is higher than room temperature: example. 1deg
Change remote controller DN_02, 03 = “-1K” to “-2K”
• Ambient temperature (remote controller) is lower than room temperature: example. 1deg
Change remote controller DN_02, 03 = “-1K” to “0”
Related DN
Item Operation flow and applicable data, etc.
TSC_rc + 2K
TSC_rc + 1K
TSC_rc
TSC_rc - 0.5K
Warm-mode
TSC_rc + 0.5K
TSC_rc
TSC_rc - 1.0K
Cool-mode
A zone: Thermo off
A’ zone: Thermo off
B zone: Down water temp
A zone: Thermo off
B zone: Up water temp
C zone: Keep water temp
D zone: Up water temp
C zone: Keep water temp
D zone: Down water temp
T_rc
Correction control
Heating Cooling
D zone
Setting is corrected upward.
Water temperature setting is up by 1deg every
30 minutes.
Setting is corrected downward.
Water temperature setting is down by 1deg every
30 minutes.
C zone No correction No correction
B zone
Setting is corrected downward.
Water temperature setting is down by 1deg every
30 minutes.
Setting is corrected upward.
Water temperature setting is up by 1deg every
30 minutes.
A zone
Setting is corrected downward.
Water temperature setting is down by 1deg every
30 minutes.
Setting is corrected upward.
Water temperature setting is up by 1deg every
30 minutes.
Thermo off. But if inlet water detected less 25°C, then
heat pump restart.
Thermo off.
A’ zone
Setting is corrected downward.
Water temperature setting is down by 1deg every
30 minutes.
Thermo off.
* ( ): 801, 1101
DN Setting item Default Variable range
18 Upper limit of cooling temperature setting 25 18 - 30°C
19 Lower limit of cooling temperature setting 7 7 - 20°C
1A Upper limit of heating temperature setting (Zone 1) 55 (65) 37 - 55 (65) °C
1B Lower limit of heating temperature setting (Zone 1) 20 20 - 37°C
40 Room temperature control 0
0: Not permitted
1: Permitted
96
Initial water temperature setting when controlling
cooling by the room temperature remote controller and
room temperature thermostat
20 5 - 30°C
9D
Initial water temperature setting when controlling
heating by the room temperature remote controller and
room temperature thermostat
40 20 - 55 (65) °C
02 (Remote controller)
Room temperature correction (at heating) -1 -10K - +10K, 1K step
03 (Remote controller)
Room temperature correction (at cooling) -1 -10K - +10K, 1K step
B2 Heat pump restart water condition in A zone. 25 20 - 37°C
B5
Choose of the initial setting temperature.
Either use the temperature set in DN_9D, or use the
temperature calculated by Auto curve.
This applies heating operation only.
0
0: Use the temperature
set in DN_9D
1: Use the temperature
calculated by Auto curve
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