Toshiba HWS-802XWHM3-E - Page 25

4.HYDRO UNIT
Engineering Data book
24
4
3-way mixing valve connection
Required Actuator Specification
Electrical Specification:230 V; 50 Hz; <100 mA
The 3-way mixing valve is used to achieve the temperature differential needed in a 2-zone heating system.
• Connect the 3-way mixing valve to terminals 2, 3 and 4 on Terminal Block 04 (for Type 1 mixing valve) or on
terminals 1, 2 and 3 on Terminal Block 04 (for Type 2 mixing valve).
• Connect the 3-way mixing valve in accordance with the diagrams below:-
Hot water cylinder connection (optional)
Hot water cylinder electrical box connections
2
1
3
4
2
1
3
4
Type 1: SPDT Type 2: SPST
port “A” to Zone 2 Heating
port “AB” to
Hydro unit
port “B” BLANK OFF
port “A”
close
open
port “A” to Zone 2 Heating
port “AB” to
Hydro unit
port “B” BLANK OFF
port “A”
close
open
Hydro Unit
TB 04
Hydro Unit
TB 04
12 LN
1
2
Earth leakage breaker
INPUT Power 230 V ~ 50 Hz
Terminal block 03
Hot water cylinder
Hydro unit