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13.3 Mains Voltage External Controls
WARNING: UNDER NO CIRCUMSTANCES MUST ANY MAINS
VOLTAGE BE APPLIED TO ANY OF THE TERMINALS ON THE
VOLTAGE FREE HEATING CONTROLS CONNECTION
TERMINAL.
When mains voltage external controls are used, remove the
MAINS VOLTAGE HEATING CONTROLS CONNECTION PLUG
from the fittings pack and install on the control interface PCB
as follows.
Gain access to the control interface by unclipping the fascia
panel and hinging forward, see diagram 13.3.
Route the external heating controls cable (not supplied) and
connect to the plug
, see diagram 13.3.
Insert plug onto controls interface PCB, see diagram 13.3.
Close the fascia panel and remove the screws to open the rear
cover of control panel, see diagram 13.1.
Secure the external heating control cable in the strain relief, and
thread the cable through rear of the control panel and out of the
cables exit, see diagram 13.4.
Close and secure rear cover of control panel.
IMPORTANT: Remove the wire link from the voltage free
heating controls connector, see diagram 13.1.
Connect external heating controls as diagram 13.5.
External controls should be fitted in accordance with the rules
in force.
13.4 Electrical Connections - Testing
Carry out preliminary electrical system checks as below:
1. Test insulation resistance to earth of mains cables.
2. Test the earth continuity and short circuit of cables.
3. Test the polarity of the mains.
230V~ 50H
PERMANEN
MAINS
3 AMP FUSE
DOUBLE POLE
ISOLATOR
EXTERNAL
JUNCTION BOX
LNE
EXTERNAL
FROST
THERMOSTAT
EXTERNAL
ROOM
THERMOSTAT
DO NOT
CONNECT
X
INTERNAL PROGRAMMER
EXTERNAL 230V AC ROOM THERMOSTAT
EXTERNAL 230V AC FROST THERMOSTAT
3
2
1
REMOVE LINK
WHEN EXTERNAL
CONTROLS ARE USED
TO MAIN PCB
CONNECTOR J15
VOLTAGE FREE
HEATING CONTROLS
CONNECTION
(ON CONTROLS
BOX COVER)
MAINS VOLTAGE
HEATING CONTROLS
CONNECTION PLUG
ON/OFF
SWITCH
CONTROLS
INTERFACE PCB
BOILER
PROGRAMMER
230V~ 50H
PERMANEN
MAINS
3 AMP FUSE
DOUBLE POLE
ISOLATOR
EXTERNAL
JUNCTION BOX
LNE
EXTERNAL
FROST
THERMOSTAT
EXTERNAL
ROOM
THERMOSTAT
DO NOT
CONNECT
X
EXTERNAL PROGRAMMER/CLOCK
EXTERNAL 230V AC ROOM THERMOSTAT
EXTERNAL 230V AC FROST THERMOSTAT
3
2
1
REMOVE LINK
WHEN EXTERNAL
CONTROLS ARE USED
TO MAIN PCB
CONNECTOR J15
EXTERNAL
PROGRAMMER
VOLTAGE FREE
HEATING CONTROLS
CONNECTION
(ON CONTROLS
BOX COVER)
MAINS VOLTAGE
HEATING CONTROLS
CONNECTION PLUG
ON/OFF
SWITCH
CONTROLS
INTERFACE PCB
BOILER
11993
11992
STRAIN
RELIEF
EXTERNAL
CONTROLS
CABLE
MAINS
CABLE
Diagram 13.4
Diagram 13.5
13 Electrical Connection
11659
CONTROL PANEL USER INTERFACE
RETAINING LATCHES
11974
➜
➜
EXTERNAL
CONTROLS
CABLE(MAINS
VOLTAGE)
PLUG
CONTROLS
INTERFACE
PCB
The type of plug and
orientation may be
different to that
illustrated but the
wiring should always
be as wiring diagrams
ci only
si only
Diagram 13.3
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