5.3
Connecting the gas supply
1.
Install a gas filter in the connection of the appliance when the gas
can be polluted.
2.
Connect the appliance gas valve to the gas pipe.
3.
Check the boiler's data plate to ensure that the appliance has been
set for the correct gas supply. The boiler is supplied for Natural Gas
(G20). A propane (G31) gas conversion set is available and an
appropriate sticker is included (see §7.7).
4.
The meter governor should deliver a dynamic pressure of 20mbar
for natural gas or 37mbar for propane.
5.
To prevent the ingress of foreign matter and possible damage to the
gas-regulating block, the gas supply pipe must be checked for
contaminants prior to connection to the boiler.
6.
On final connection of the gas supply to the boiler, the complete gas
installation, including the meter, must be tested for gas soundness
and purged as described in BS6891.
5.4
Electrical connection
CAUTION
The appliance requires a 230 V ac 50 Hz mains supply, and
must be earthed and connected via a double pole isolating
switch fitted with a 3 amp fuse. The switch must be readily
accessible, within 1m of the appliance, and provide
complete electrical
isolation for the boiler and control
system.
The appliance is supplied factory wired complete with 1 m
of mains cable. (Note – the plug must be removed from the
cable). All electrical connections to the mains supply must
be made in full accordance with the current I.E.E.
regulations (BS 7671).
Isolate the supply by opening the double pole switch
when carrying out maintenance activities.
1.
Remove the pipework cover forwards.
2.
Unscrew the screws (A) in order to gain access to the space of the
burner controller (B).
3.
The cover plate hinges open downwards. Here hold the display
window.
4.
Consult § 5.4 and § 10.1 for making connections.
5.
After having made the required connections, connect the appliance
to a switched supply, as given above.
5.4.1
Electrical connections
Temperature control
Connector X4
Remarks
Room thermostat
6 - 7
-
Outside temperature sensor 8 - 9
-
External economy switch
4 - 5
Remove link
Frost thermostat
6 - 7
Parallel through
room thermostat
Power 24 V dc (3VA)
6= +, 9= -
Power supply
available for clock
thermostat, etc
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