To Connect The Backup Heater To The Main Unit; To Connect The Shut-Off Valve - Daikin Altherma 3 H MT ECH2O Series Installation Manual

Model (power Connections to backup heater power
supply)
X6M
*6V (6V: 1N~ 230 V)
SWB2
F1B
32A
Q1DI
1N~, 50 Hz
230 V AC
X6M
*9W (3N~ 400 V)
SWB2
F1B
20A
Q1DI
3N~, 50 Hz
400 V AC
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
1 User interface panel
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.
ETSH/X(B)12P30+50EF
Daikin Altherma 3 H MT ECH₂O
4P663479-1 – 2021.07
supply
1 3
I I
2 4
L N
1 3 5
I I I
2 4 6
L1 L2 L3 N
unit" [ 4 7]):
3 Fix the cable with cable ties to the cable tie mountings. General
information, see
unit" [ 4 15].
indoor
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
1 User interface panel
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.
4
3
2
1
6 Electrical installation
"6.3.1 To connect the electrical wiring to the
"4.2.1 To open the indoor
Installation manual
unit" [ 4 7]):
4
3
2
1
19