0020277262_02 ecoFIT sustain Installation and maintenance instructions
23
7.10.4 Establishing the power supply
1
1.
Observe all valid regulations.
2.
Ensure that the nominal mains voltage is 230 V.
3.
Do not interrupt the mains supply with a time switch or
programmer.
4.
Set up a fixed connection and install a partition with
a contact gap of at least 3 mm (e.g. fuses or power
switches).
5.
Isolation should preferably be by a double pole
switched fused spur box having a minimum contact
separation of 3mm on each pole. The fused spur box
should be readily accessible and preferably adjacent to
the boiler. It should be identified as to its use.
6.
Provide one common power supply for the boiler and
for the corresponding control:
–
Power supply: Single-phase, 230 V, 50 Hz
–
Fuse protection:
≤
3 A
7.
Open the electronics box. (
8.
Observe the routing of the power supply cable
(1)
in the
electronics box in order to guarantee that there is no
strain.
≤ 30 mm
N
L
X1
230V~
RT
9.
Carry out the wiring. (
10. Close the electronics box.
11. Make sure that access to the power supply is always
available and is not covered or blocked.
7.10.5 Connecting the heating pump
▶
Connect the heating pump to the boiler; see the wiring
diagram in the appendix.
7.10.6 Connecting controls to the electronics
X2
X22
X41
– +
24V=
RT
BUS
Burner
off
X106
BUS
24 V
BUS
RT
B.of
f
B
ur
ner
of
f
R
T
24V
=
-
+
B
U
S
1
4
3
2
1
Safety thermostat for
underfloor heating
2
24 V control
3
eBUS control or radio
receiver unit
4
Outdoor temperature
sensor, wired
1.
Open the electronics box. (
2.
Carry out the wiring. (
3.
Connect the individual components depending on the
installation type.
