20
8
Electrical
8.1 Connecting the Power
Supply
Ensure that the electrical supply has
been isolated before making any
connections to the boiler.
The boiler requires a permanent 230 V
mains supply (fused at 5 Amp).
The Vortex Pro External Combi e is
supplied fitted with an electrical isolation
plug, located in the left hand end of the
boiler control panel. All electrical wiring
to the boiler must be made to this plug.
The isolation plug is connected to the
power supply and heating / hot water
controls as follows:
1. The isolation plug is located the
control panel. Pull the plug to the
left to remove it from the socket in
the left hand end of control panel.
2. Remove the two screws and prise
off the cover from the plug to gain
access to the five terminals.
Pass the cable from the electrical
power supply and heating / hot water
controls through the cable clamp on
the underside of the control panel
before making connections to the
isolating plug.
3. Connect the electrical supply and
heating / hot water controls to the
terminals in the isolating plug as
follows:
• Terminal L1 - Heating on (from
Timer, Thermostat or
Programmer).
• Terminal L2 - Hot water on (from
Programmer).
• Earth Terminal - Green / Yellow
to
mains
Earth.
• Terminal N - Blue to mains
Neutral.
• Terminal L3 - Brown to mains
Live (including permanent live
for
Frost Thermostat).
The terminal numbers are marked
on the top cover of the plug. Refer
to Sections 8.3 and 8.4 for details
of controls wiring BEFORE making
connections to the isolating plug.
4. Replace the cover on the plug, refit
the two screws and ensure it is
securely fitted. Measure a maximum
of 350mm of cable between the
plug and the cable clamp below the
control panel and tighten the cable
clamp to secure the cable.
Check that the cable is securely
clamped and that the cable length
between the clamp and plug is no
more than 350mm.
5. Re-fit the isolation plug into the
socket in the control panel.
A Service switch is fitted to the
control panel to allow the Service
Engineer to test-fire the boiler.
When set to ‘ON’ the switch
temporarily by-passes the external
control system to operate the boiler.
This is a ‘momentary’ or non-latching
switch that cannot be left set to ON.
The boiler will automatically revert to
normal operation when 15 minutes
have elapsed since it was last operated.
If required, this 15 minute override
period can be stopped by switching
the boiler On / Off switch OFF and then
back to ON.
The boiler will then operate as normal
under control of the external heating/
hot water controls (timer, room
thermostat or programmer).
!
WarninG
!
WarninG
Do not switch on the electricity
supply at this stage.
!
WarninG
!
nOtE
!
nOtE
Burner Lead Plug/Socket Connector
On all three models, the electrical
cable between the boiler control panel
and burner is now fitted with an in-line
3-way plug and socket connector.
This enables the burner to be easily
disconnected from the boiler control
panel for ease of removal for servicing.
