Daikin Altherma 3 H MT ECH2O, Installation Manual

Page: 19 / 44

6 Electrical installation
Installation manual
19
ETSH/X(B)12P30+50EF
Daikin Altherma 3 H MT ECH
₂ O
4P663479-1 – 2021.07
Model (power
supply)
Connections to backup heater power
supply
*6V (6V: 1N~ 230 V)
1N~, 50 Hz
230 V AC
SWB2
Q1DI
N L
X6M
1
2
3
4
F1B
32A
I I
*9W (3N~ 400 V)
3N~, 50 Hz
400 V AC
SWB2
Q1DI
L1 L2 L3 N
X6M
1
2
3
4
5
6
F1B
20A
I I I
F1B Overcurrent fuse (field supply). Recommended fuse:
tripping class C.
Q1DI Earth leakage circuit breaker (field supply)
SWB Switch box
X6M Terminal (field supply)
6.3.4 To connect the backup heater to the main
unit
Wires: The connection cables are already connected to the
option backup heater EKECBU*.
[9.3] Backup heater
1 Open the following (see "4.2.1 To open the indoor unit" [
4
7]):
1 User interface panel
1
3
4
2
2 Switch box
3 Switch box cover
4 Top cover
2 Connect both connection cables from the backup heater
EKECBU* to the appropriate connectors as shown in the
illustration below.
3 Fix the cable with cable ties to the cable tie mountings. General
information, see
"6.3.1 To connect the electrical wiring to the
indoor unit" [
4
15].
6.3.5 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. For more information, see the installer reference
guide.
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 unit" [
4
7]):
1 User interface panel
1
3
4
2
2 Switch box
3 Switch box cover
4 Top 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.