BOILER REPLACEMENT: OPTIMAX 25C TO MODENA 32C HE
13. Open the cold water isolation valve and thoroughly flush the cold/hot water pipe-work by
opening all the hot taps.
14. Reinstate the gas supply, purge and test in accordance with BS 6891 and IGE/UP/1.
15. Connect the boiler to the electrical supply;
the boiler is provided with a 1m cable and
plug. Reconnect any external controls to
the
volt free
terminal block in the boiler.
To access the connections remove the securing
screw and hinge the controls cover to the left.
Connect the external controls to terminal
block (72) as shown in Fig. 12.
Grommets to accept wiring from external controls are
found on the right underside of the boiler.
Please note:
All electrical work must be in accordance with IEE Wiring Regulations - BS 7671:
External controls need to be compliant with Building Regulations L1A/L1B; further information is
available from the “Domestic Building Services Compliance Guide”
Fig.12