9
ALL WIRING MUST BE CARRIED OUT IN ACCORDANCE WITH CURRENT IEE WIRING REGULATIONS.
The POTTERTON GOLD boiler must be installed by a qualified competent tradesman in accordance
with supplied instructions and drawings to ensure correct operation.
Check the main incoming supply to the property to ensure there is sufficient current and voltage
for the size of the boiler or boilers to be installed. Remember to also take account of the supply
requirements for the rest of the property. Ensure the correct cable size is used to feed the boiler
(refer to IEE wiring regulations).
A double pole RCD with a trip level sensitivity of 30mA and capable of breaking the full load current
to BS EN 61008:1994, must be used.
In order to provide a means of isolation, the boiler must be connected to the supply through a double
pole linked switch with a minimum contact gap of 3mm in all poles. The RCD is suitable for this
requirement if it is mounted in close proximity to the boiler.
A correctly rated MCB must be used in the supply, see Technical Specifications (page 3). An additional
3A supply is required for the controls etc. NOTE, a blank must be fitted between each MCB to provide
ventilation, check with the MCB manufacturer/supplier.
NOTE: The high current mains supply MUST NOT be routed through the programmer, controls etc.
Follow the wiring diagrams. Use a standard programmer, room thermostat, etc. The high current
switching is carried out inside the boiler, only standard switched live (low current) control signals
are supplied by the programmer etc.
Electrical Connections
Access can be gained to the electrical connections by removing the top front panel.
CONN 5: MAIN POWER. Main power-supply cables. Connect the power cables from the power
1.
“supply” (CONN 5) terminals on the PCB assembly in the boiler directly to the isolation switch, live,
neutral and earth. Use the correct rated cable. Do not connect the power through the programmer,
thermostats etc. The main power PCB terminals in the boiler are suitable for cables up to 10mm
2
.
NOTE: THESE CONNECTIONS MUST BE TIGHT. LOOSE CONNECTIONS WILL CAUSE BURNING AT
CONN 5 CONNECTOR, THIS IS NOT COVERED BY THE WARRANTY.
CONN 1 pins 2 & 3: CONTROL SIGNAL. Connect switched live to ‘R’ and neutral to ‘N’ on the
2.
control terminal block in the boiler to the switched live and neutral from the programmer control
circuit. A neutral must be connected, as this control signal is optically isolated from the main
supply in the boiler and will not run without a neutral. Do not connect any wires to the terminal
marked N/C.
CONN 1 pins 4, 5 & 6: PUMP CONNECTIONS. The supply to the pump must be connected to the
3.
‘PUMP’ terminal on the control terminal block in the boiler. This supply is fused in the boiler at
2A.
Cable access is made from either the right or left hand side via the x3 knockouts provided (x1
4.
25mm for power and x2 20mm for pump and thermostat cables). Having decided which side to
route the cables, remove x3 knockouts only (This can be achieved with a small tap from a ball
nose hammer, then twisting the knockout untill it is removed. Note: Take care not to damage the
casing, ensure the metal discs are retrieved and no sharp edges are present. The cables should
be installed using a cable compression gland (not supplied).
INSTALLATION - ELECTRICAL REQUIREMENTS
x3 KNOCKOUTS
LEFT HAND SIDE
X3 KNOCKOUTS
RIGHT HAND SIDE
FIGURE FIVE: CASE KNOCKOUTS
FIGURE SIX: TWISTING KNOCKOUT