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6 Electrical installation
Model (power
Connections to backup heater power
supply)
*6V (6V3: 1N~ 230 V)
SWB
F1B
1N~, 50 Hz
230 V AC
*6V (6T1: 3~ 230 V)
K5M
SWB
F1B
Q1DI
3~, 50 Hz
230 V AC
F1B
Overcurrent fuse (field supply). Recommended fuse:
4‑pole; 20 A; curve 400 V; tripping class C.
K5M
Safety contactor (in the lower switch box)
Q1DI
Earth leakage circuit breaker (field supply)
SWB
Switch box
X6M
Terminal (field supply)
NOTICE
Do NOT cut or remove the backup heater power supply
cable.
Installation manual
16
supply
2
4
6
(14) 8
K5M
1
3
5
(13) 7
X6M
1
3
5
7
I
I
I
I
2
4
6
8
Q1DI
L
N
2
4
6
(14) 8
1
3
5
(13) 7
X6M
1
3
5
7
I
I
I
I
2
4
6
8
L1 L2 L3
6.3.3
To connect the shut-off valve
INFORMATION
Shut-off valve usage example. In case of one LWT zone,
and a combination of underfloor heating and heat pump
convectors, install a shut-off valve before the underfloor
heating to prevent condensation on the floor during cooling
operation.
Wires: 2×0.75 mm²
Maximum running current: 100 mA
230 V AC supplied by PCB
[2.D] Shut off valve
1 Open the following (see
"4.2.1 To open the indoor
1 Top panel
2 User interface panel
3 Upper switch box cover
2 Connect the valve control cable to the appropriate terminals as
shown in the illustration below.
NOTICE
Wiring is different for a NC (normally closed) valve and a
NO (normally open) valve.
A
B
A
B
B
3 Fix the cable with cable ties to the cable tie mountings.
unit" [ 4 6]):
1
3
2
M2S
NO
21 28
X2M
NC
21 29
X2M
ETVH16SU18+23E
Daikin Altherma 3 H HT F
4P644729-1E – 2023.10
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