ecoTEC plus 937 installation and maintenance manual
28
4.19 Electrical
connection
4.19.1 General
requirements
e
Danger!
Risk of fatal electric shock from touching live
connections!
Before working on the appliance, turn off the
power supply and secure against restart!
All work on the electrical system should be
carried out by a competent person and must be
in accordance with BS 7671 (IEE Regulations).
In the Irish Republic the current issue of the
ETCI Regulations (Electro-Technical Council for
Ireland) must be observed.
a
Caution!
For the electrical connection observe the
relevant installation instructions for the
ecoTEC combi boilers and the country-specific
regulations.
The appliance is designed for connection to 230 V,
~ 50 Hz supply with a 3 A rating. Connection to the
mains supply shall be made via a fused 3 pin plug to an
unswitched shuttered, and should comply with BS 1363.
(Alternatively the connection can also be carried out
with a 3 A fused two-pole isolator, whose contact
separation at all poles is at least 3 mm and which
supplies only the appliance and controls). The
connection must permit complete isolation of the
appliance and its connected controller from the mains
supply. It should be easily accessible and be located in
the proximity of the combi boiler. Use a three core
flexible cable in accordance with BS 6500, Tables 6, 8
or 16 (3 x 0.75 to 3 x 1.5 mm
2
).
e
Danger!
Danger of death by electric shock!
The unit must be earthed.
Danger!
Danger of death by electric shock!
The power connections L and N continue to be
under power when the main switch of the combi
boiler is switched off.
a
Caution!
Danger of damage to the equipment!
Do not connect mains 230 V power to the
terminals 7-8-9 or eBUS (+, -).
h
Note!
Ensure that all wiring passes through the cable
clamps in the rear of the control box and are
securely fixed.
• Check that when connecting the mains wiring that the
current carrying conductors become taut before the
earth conductor should the supply cable slip from the
cable clamp.
4.19.2 Connecting shift load storage tank
1
2
X12
X31
Fig. 4.15 Opening the electronics box
• Pull the electronics box forward and lower.
• Unclip the back cover of the electronics box and lift
the cover upwards to reveal the connections.
4 Sequence of operations during installation
