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7. HYDRO UNIT INSTALLATION MANUAL
Engineering Data Book
7
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)
• 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
Electrical Connection (Hot Water Cylinder temperature Sensor)
• Connect the hot water cylinder temperature sensor as shown below to terminals A & B on Terminal Block 06 in
the Hydro Unit.
• Please ensure that the interconnecting cable, between the Hydro Unit and the hot water cylinder, is connected
to earth at both ends of the cable using the shield wire.
▼
Fig. 7-28
2
1
3
4
▼
Fig. 7-29
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
2
1
3
4
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
1
2
L
N
1
2
▼
Fig. 7-30
Earth leakage breaker
INPUT Power 230 V ~ 50 Hz
Terminal block 03
Hot water cylinder
26-EN
Summary of Contents for ESTIA HWS-1102H-E
Page 3: ...2 1 INTRODUCTION ...
Page 7: ...6 2 SYSTEM OVERVIEW ...
Page 10: ...9 3 SYSTEM SPECIFICATION ...
Page 12: ...11 4 HYDRO UNIT ...
Page 44: ...43 5 OUTDOOR UNIT ...
Page 57: ...56 6 HOT WATER CYLINDER ...
Page 63: ...62 7 HYDRO UNIT INSTALLATION MANUAL ...
Page 107: ...105 8 OUTDOOR UNIT INSTALLATION MANUAL ...
Page 131: ...129 9 OWNER S MANUAL ...
Page 146: ...Air to Water Heat Pump Engineering Data Book Aug 2009 ...