27
4000121771-2
10212
CONTROL PANEL USER INTERFACE
RETAINING LATCHES
11974
Diagram 13.3
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 11.3.
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~ 50Hz
PERMANENT
MAINS
SUPPLY
3 AMP FUSE
DOUBLE POLE
ISOLATOR
EXTERNAL
JUNCTION BOX
L
N
E
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~ 50Hz
PERMANENT
MAINS
SUPPLY
3 AMP FUSE
DOUBLE POLE
ISOLATOR
EXTERNAL
JUNCTION BOX
L
N
E
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
11984
EXTERNAL
CONTROLS
CABLE(MAINS
VOLTAGE)
11983
STRAIN
RELIEF
EXTERNAL
CONTROLS
CABLE
MAINS
CABLE
Diagram 13.4
Diagram 13.5
13 Electrical Connection
CONTROLS
INTERFACE PCB
PLUG
