Potterton Performa System 12e, Installation And Servicing Instructions, Page: 15 / 44

7.0 Site Requirements
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7.5 Ventilation of Compartments
1. Where the appliance is installed in a cupboard
or compartment, no air vents are required.
2. BS 5440: Part 2 refers to room sealed
appliances installed in compartments. The
appliance will run sufficiently cool without
ventilation.
7.6 Gas Supply
1. The gas installation should be in accordance
with BS 6891.
2. The connection to the appliance is a 22mm
copper tail located at the rear of the gas service
cock (Fig. 7).
3. Ensure that the pipework from the meter to the
appliance is of adequate size. Do not use pipes of
a smaller diameter than the boiler gas connection
(22mm).
7.7 Electrical Supply
1. External wiring must be correctly earthed,
polarised and in accordance with current I.E.E.
Wiring Regulations.
2. The mains supply must be 230V ~ 50Hz and
fused at 3A maximum.
NOTE: The method of connection to the
electricity supply must facilitate complete
electrical isolation of the appliance.
Connection may be via a fused double-pole
isolator with a contact separation of at least
3mm in all poles and servicing the boiler and
system controls only.
3. When the system includes an indirect domestic
hot water cylinder it is recommended that a
cylinder thermostat is used in conjunction with a
3 port 2 position valve or 2 port zone valve.
Fig. 7
Gas Service Cock