38
Wiring of the 3-way valve is different for NC(normal close) and NO (normal open). Before wiring, read the Installation
& Owner's manual for the 3-way valve carefully and install the valve as showed in the picture. Make sure to connect it
to the correct terminal numbers.
NOTE
3) For 3-way value SV3
Control port signal type
Voltage
Maximum running current(A)
Wiring size(mm
2
)
Type 2
220-240VAC
0.2
0.75
SV1
1ON
5
1OFF
6
N
16
SV2
2ON
7
2OFF
8
N
17
SV3
3ON
19
3OFF
20
N
18
Procedure
Connect the cable to the appropriate terminals as shown in the picture.
Fix the cable reliably.
Connection of the booster heater cable depends on the application. Only when the domestic hot water tank is installed will
this wiring be needed. The unit only sends a turn on/off signal to the booster heater. An additional circuit breaker is needed
and a dedicated terminal is needed to supply power to the booster heater.
See also "8 Typical application examples" and "10.7 Field settings/DHW control” for more information.
Procedure
Connect the cable to the appropriate terminals as shown in the picture.
Fix the cable with cable ties to the cable tie mountings to ensure stress relief.
5) For tank booster heater:
Control port signal type
Voltage
Maximum running current(A)
Wiring size(mm
2
)
Type 2
220-240VAC
0.2
0.75
N
13
16
TBH
TANK BOOST HEATER
CONTROL SIGNAL OUTPUT
Procedure
Connect the cable to the appropriate terminals as
shown in the picture.
Fix the cable reliably.
Control port signal type
Voltage
Maximum running current(A)
Wiring size(mm
2
)
Type 2
220-240VAC
0.2
0.75
P_c
N
9
21
PUMP_c
CONTROL SIGNAL
OUTPUT
(For zone 2 pump)
P_o
N
PUMP_o
CONTROL SIGNAL
OUTPUT
(For zone 1 pump or
outside circulating pump )
10
22
P_s
N
PUMP_s
CONTROL SIGNAL
OUTPUT
(For solar pump)
11
23
P_d
N
PUMP_d
CONTROL SIGNAL
OUTPUT
(For DHW tank
circulating pump)
12
24
4) For different functions pumps
：
V.2
Summary of Contents for ETH220VMA
Page 164: ...V 2...
