Diagram 11.3
11.3 Electrical Cartridge Securing
Close the cartridge and secure with the previously removed
screw.
Push the electrical cartridge into the interface housing on
completion of the wiring, see diagram 11.3.
Secure with the two cartridge retaining screws provided in the
cartridge body.
11.4 Electrical Connections - Testing
Carry out preliminary electrical system checks as below:
1. Test insulation resistance to earth of mains cables.
2. Test the earth continuity and short circuit of cables.
3. Test the polarity of the mains.
NOTE: If you require to test the appliance refer to section 14.
12 Commissioning
12.1 Preliminaries - All Systems
The commissioning should be carried out by a competent
person in accordance with the current issue of BS6798.
DO NOT operate the boiler without water.
Make sure that the system has been thoroughly ushed
out with cold water and that all cleanser, if used, has been
removed.
Isolate the boiler from the mains electrical supply.
Test for gas tightness and purge air from the gas supply.
12.2 Filling the Heating Circuit
With the gas service isolation valve closed and with no
demand from any external controls.
1. Fill the heating system.
Sealed system only - ll the system to a pressure of
1.0bar.
2. Vent all air from the system - repeat as
neccessary until the system is full and all the air has
been vented.
12.3 Gas Supply
The gas valve is factory set for natural gas (G20) and should
need no adjustment. Turn on the gas supply at the isolation
valve, see diagram 12.1. Check the supply pressure at the
pressure test point is 20mbar.
Diagram 12.1
14507
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