Wiring The Appliance - Potterton Combi 80 Installation & Service Instructions Manual

Installation - Page 15
2.6

Wiring the Appliance

The wiring diagram is located on the inside of the front
casing panel.
1. Undo the single retaining screw on the top of the
controls panel and allow the panel to swing down.
2. Using PVC insulated cable of not less than 0.75 mm².
(24/0.2 mm to BS 6500 Table 16), wire up the panel
referring to the termination label. (Fig. 10).
Note: Ensure cables pass through the bushes and are
securely fixed by the cable clamps.
If a room thermostat is to be fitted, remove the Red link
wire between terminals 3 and 4 and discard prior to
wiring in the thermostat. If no room thermostat is to be
fitted retain link wire.
If a programmable room thermostat is to be used it must
be fitted in place of the external timer and the link
between 3 & 4 retained.
If the installation does not have an internal or external
timer the central heating switch on the front of the
appliance must be set to Constant during periods when
central heating is required.
If using an internal timer connect the timers lead to PL11
on the modulation control board - See
Electrical Diagram, Page 41.
If an external frost thermostat is required it should be
connected to terminals 3 and 8 on the boiler terminal
block. For the frost thermostat to function the boiler
switch must be set to 'On'.
Fig 10
3. Check all wiring and reposition the control panel.
4. Secure with screw provided.
Note: The electrical mains supply must be fused at 3 A,
and the connection must be made to the wiring panel in
such a way that should the lead disengage from the
cable clamp, the current carrying conductors become
taut before the earth conductor.
Notes:
1. If a Room Thermostat is to be fitted the link wire
between 3 & 4 on the wiring panel must be
removed.
2. If an External timer is not required, two internal
timers are available.
3. If using an internal timer, connect it to plug 11 on
the PCB. If a timer is not being installed, the central
heating switch on the front of the appliance must be
set to 'Constant' for the heating to operate.