Daikin Altherma 3 H MT W, Installer'S Reference Manual

Page: 116 / 296

9 | Electrical installation
Installer reference guide
116
EPRA08~W1 + ETBH/9W
Daikin Altherma 3 H MT W
4P634885-1 – 2021.03
Model (power supply) Connections to backup heater power supply
*9W (3N~ 400 V)
3N~, 50 Hz
400 V AC
SWB
Q1DI
L1 L2 L3 N
1
2
3
4
5
6
7
8
F1B
I I I I
X6M
2
1
K5M
4
3 6
5 14
13
BRN GRY
BLK BLU
F1B Overcurrent fuse (field supply). Recommended fuse: 4‑pole; 20 A; curve 400 V;
tripping class C.
K5M Safety contactor (in the 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.
9.3.3 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.
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 "7.2.5 To open the indoor unit" [
4
71]):
1 Front panel
1
2
3
2 Switch box cover
3 Switch box
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.