Potterton Gold 4 kW Installation And Servicing Instructions page 11

MAINS SUPPLY
N L
DOUBLE POLE
RCD OR DOUBLE
POLE ISOLATION
LOCAL TO BOILER
DOUBLE POLE
ISOLATION SWITCH
OR DOUBLE POLE
RCD
PUMP
FIGURE EIGHT: BOILER SUPPLY USING EXISTING CONSUMER UNIT
CONSUMER UNIT
MCB MCB
N R E N L
CONN1
ELECTRIC BOILER
AIR
MCB
GAP
N E L
CONN5
BOILER SUPPLY
MCB
3A FUSED
SPUR OR MCB
L
TO CONTROLS
PROGRAMMER / ETC
N
DEMAND SIGNAL
FROM CONTROLS/
PROGRAMMER ETC
(SEE TYPICAL
WIRING DIAGRAMS)
HEAT RESISTANT
CABLE
EARTH BONDING
TO BE PERFORMED
IN ACCORDANCE
WITH BS7671
11