–26–
Hydro Unit
Installation Manual
EN
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:
▼ Fig. 7-28
▼ Fig. 7-29
Hot water cylinder connection (optional)
• Please refer to “Electrical supply/cable
specifications” for fuse/cable size and for
connection details.
Electrical Connection (Hot Water Cylinder
Electric Heater)
• The electric heater, incorporated in the hot water
cylinder, requires a separate supply to Hydro Unit.
• Connect the hot water cylinder heater electrical
supply in accordance with shown below:
Live conductor: Terminal L on Terminal Block 03
Neutral conductor: Terminal N on Terminal Block 03
Earth Conductor: Earth terminal on Terminal Block
03
• Connect the hot water cylinder heater to the Hydro
Unit as shown below:
Live conductor to hot water cylinder: Terminal 1 on
Terminal Block 03
Neutral conductor to hot water cylinder: Terminal 2
on Terminal Block 03
Earth conductor to hot water cylinder: Earth terminal
on Terminal Block 03
▼ Fig. 7-30
port “A” to Zone 2 Heating
port “AB” to
Hydro unit
port “B” BLANK OFF
port “A”
close
open
Hydro Unit
TB 04
Type 2: SPST
port “A” to Zone 2 Heating
port “AB” to
Hydro unit
port “B” BLANK OFF
port “A”
close
open
Hydro Unit
TB 04
Earth leakage breaker
INPUT Power
220-230 V ~
50 Hz
Terminal block 03
Hot water
cylinder
26-EN
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