2.20 ELECTRICAL CONNECTIONS
For IE reference should be made to the current ETCI rules
for electrical installations
Wiring should be 3 core PVC insulated cable, not less
than 0.75 mm
2
(24 x 0.2 mm), and to BS EN 50525-1:2011
Table 16.
Connection must be made in a way that allows complete
isolation of the electrical supply. The means of isolation
must be accessible to the user after installation.
A mains supply of 230 V ~ 50 Hz is required.
3 A fuse required. All external controls and wiring must be
suitable for mains voltage.
Wiring external to the boiler must follow current I.E.E
(BS7671) wiring regulations and local regulations.
2.21 INSTALLER WIRING
The boiler must be connected to a permanent live power
supply.
Accessing the installer wiring
1.
Isolate the mains supply from the boiler.
2.
Remove the front panel.
Refer to Section
3.4
3.
Swing down the control box into the service position,
unclip and swing back the installer wiring cover and latch
into the retaining clips.
4.
Carefully pierce the grommet, release the cable clamp
via the screws and pull wiring through.
5.
Connect external wiring to the appropriate connections
securely and then refit the cable clamp.
Once any wiring is completed, to secure the boiler, reverse
the order above.
The link wire on the 230 V installer room stat/timer
connection gives a demand in conjunction with the timer
option plug inside the timer option cover. This is located on
the front of the control box.
WARNING:
This appliance must be earthed
WARNING:
Ensure the supply cord is not damaged
COMBI
HEA
T / SYSTEM
SL1
L
IN
L
IN
SL2
OPTIONAL
FROST STAT
ROOM
STAT/
TIMER L N
MAINS IN
UIN
230010 A01
L N
MAINS IN
COMBI
HEA
T / SYSTEM
SL1
L
IN
L
IN
SL2
OPTIONAL
FROST STAT
ROOM
STAT/
TIMER L N
MAINS IN
UIN
230010 A01
L N
MAINS IN
OPEN THERM./
WEATHER COMP.
27
Installation and Servicing
Section 2 - Installation
INST
ALLA
TION
Installer Connections (LHS)
Installer Connections (RHS)
