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Toshiba
8-3.
Hydro Unit
Control
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:
For 2-temperature control, DP_SW12-3 Zone2 "Yes" must be selected.
Related FC
6)Q-H characteristics of hydro unit
The following shows the Q-H characteristics.
6-1)HWS-801XWHM3-E, T6-E
6-2)HWS-1402XWHM3-E, T6-E, T9-E
Item Operation flow and applicable data, etc.
TSC_ΔT2 TSC_ΔT -2 TSC_ΔT < 2 -2 > TSC_ΔT
Control value + 1 step (Open) ± 0 step - 1 step (Close)
Initial value Driving range 1 step Control cycle
6 0-12 3 WV move 7.5 degs 4 mins (FC)
FC No. Setting item Default Setting available range
0C Mixing Valve operation time 60 30 - 240 secs
59 Mixing Valve control time 4 1 - 30 mins
Flow rate(L/min)
Pump head(m)
0
10 15 20 25 30
1
2
3
4
5
6
7
8
Out of
Operation
Range
SW1
SW2
SW3
Minimum flow rate
Hydraulic heat exchanger(8kW)QH characteristics
0
0 5 10 15 20
Flow rate(L/min)
25 30 35 40 45 50 55 60 65
1
2
3
4
Pump head(m)
5
6
7
8
9
Minimum flow rate
Hydraulic heat exchanger(14kW)QH characteristics
10
Out of Operation
Range
SW1
SW2
SW3
+00A09-002_01EN_SVM_ALL_Air_to_Water.book Page 53 Monday, October 5, 2009 2:09 PM