Potterton Prorile Prima 30e Installation And Servicing Instructions page 16

INSTALLATION INSTRUCTIONS - Page 16
ELECTRICAL
The boiler and all external control circuit wiring must be
supplied from the same single isolating switch or plug
and socket, and should be fused at 3A.
Care must be taken to ensure that all wiring to the boiler
is kept clear of sharp edges and hot surfaces.
FIG. 22 ACCESS TO THE BOILER ELECTRICAL
FIG. 21 PRINCIPLE OF WIRING
The boiler terminal block which is situated in the control
box is not designed to accept wiring from all the on site
controls and therefore the installer will usually need to
incorporate a suitable junction box. This may not be
required if a Potterton Electronic Programmer is used as
this incorporates a junction box. The principle of wiring is
shown in FIG. 21.
Further information on wiring of system controls can be
found in the Control System, Pipework and Wiring Guide.
Remove control box securing screw and lower the control
box to gain access to the boiler terminal block.
Remove packaging from rear of the control box.