Flue System; Electrical Connections; Electrical Wiring - Potterton Envoy System 30 Installation & Service Instructions Manual

Installation - Page 13

Flue System

Assemble and attach the flue system to the boiler by
following the instructions supplied with the flue kit.
Fig.11

Electrical Connections

The boiler and all external control circuit wiring must be
supplied from the same isolating switch or plug and socket.
The boiler terminal block which is situated in the control box
is not designed to accept wiring from all the on-site controls
therefore the installer will need to incorporate an external
junction box.
Remove the securing screw and lower the expansion vessel.
Open the control box by removing the two M4 securing
screws and lowering the access door as illustrated.

Electrical Wiring

EN0044A
Route a four core cable from the external junction box
through the cable clamp in the underside rear of the control
box and connect to boiler terminal block as follows.
Fig.12
Permanent live to terminal marked L
Neutral to terminal marked N
Earth to terminal marked
Switched live from external controls to terminal marked SwL
If there are no external controls fitted connect SwL terminal to permanent live in the junction box.
Note: The electrical mains supply must be fused at 3A and the connection must be made to the boiler terminals in such a
way that should the lead disengage from the cable clamp, the current carrying conductors become taut before the earth
conductor.
Close the control box and replace the two M4 securing screws.
Publication No. 559787 Installation 13
Supplied By www.heating spares.co Tel. 0161 620 6677