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Item
8-3.
4) Control by the flow switch
Hydro Unit Control
Whether water flows or not is judged with the ON/OFF of the flow switch.
Model
HWS-P805**-E
HWS-P1105**-E
Without water-flow determination from the flow switch after the hot water supply operation, heating operation, or cooling
operation, The HP, backup heater and booster heater are not energized. Similarly, The "A01" error indication flashes if
the flow switch judged that water does not flow.
The specification of the flow switch is the same in P805**-E and P1105**-E. The flow setting differs due to the
specification of piping in the hydro unit.
5) Mixing Valve control (2-temperature heating control)
To set different radiator unit supply temperatures or floor heating supply temperatures, the unit performs Mixing Valve
control.
When Mixing Valve "Yes" is selected, the unit controls Mixing Valve every 4 minutes (FC) based on the difference TSC_Δ
T between the Zone2 set temperature and TFI (floor inlet water temperature sensor) temperature as follows:
Control value
Initial value
To enable 2 zone temperature control switch DP_SW12-3 to ON.
NOTE:
The mixing valve will automatically be reset if 24 hours pass with the valve fully closed.
2 zone temperature control by boiler with P1 OFF is required DP_SW10-3 OFF.
Related FC
FC No.
0C
59
6) Room temperature control
You can install a sub remote controller (separately purchased) in a room to control room temperature.
6-1) Installing the sub remote controller
• Wiring with the main unit (See the figure on the right) : After detaching the front
panel, connect the sub remote controller to the right terminal on the main remote
controller, which is connected with the hydro unit. (No polarity)
• Place to install (inside a room): At the height of 100 cm-150 cm on a wall
Opposite to the radiator or fan coil installed
No assignment when floor heating is used on the room.
6-2) Room temperature control settings
• Function code setting:FC_40="1"
• Setting of the remote controller Temperature control "ON".
(Setting → Initial setting → Temperature control)
Operation flow and applicable data, etc.
Determined that water flows when:
13L or more water flows per minute
18L or more water flows per minute
TSC_ΔT
2 ≤ TSC_ΔT
+ 1 step (Open)
Driving range
6
0-12
Setting item
Mixing Valve operation time
Mixing Valve control time
Determined that water does not flow when:
Water less than 13L flows per minute
Water less than 18L flows per minute
-2 ≤ TSC_ΔT < 2
± 0 step
1 step
3 WV move 7.5 degrees
Default
60
4
60
-2 > TSC_ΔT
- 1 step (Close)
Control cycle
4 min (FC)
Setting available range
30 - 240 sec
1 - 30 min
Right terminal on the
main remote controller
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