12
ELECTRICAL INSTALLATION
WARNING. This boiler must be earthed.
All system components shall be of an approved type.
Connection of the whole electrical system and any
heating system controls to the electrical supply must
be through a common isolator.
Isolation should preferably be by a double pole swit-
ched fused spur box having a minimum contact
separation of 3 mm on each pole. The fused spur box
should be readily accessible and preferably adja-
cent to the boiler. It should be identified as to its use.
Connect the integral supply lead, coiled and tucked
behind the boiler, to the mains supply.
Important :
The integral mains supply lead is specific to
the boiler. A replacement can be obtained by quo-
ting part number 57037.
A fused three pin plug and socked outlet may be
used instead of the fused spur box provided that,
a)
They are not used in a room contaning a fixed bath
or shower
b)
Both the plug and socket comply with the current
issue of BS 1363.
The mains electrical supply must be maintained at all
times in order to provide correct operation of the
boiler.
Do not interrupt the supply with a time switch or pro-
grammer.
WARNING. ON NO ACCOUNT MUST ANY EXTERNAL
VOLTAGE BE APPLIED TO ANY OF THE TERMINALS ON
THE HEATING CONTROLS CONNECTION PLUG.
Warning :
This appliance must be wired in accord-
ance with these instructions. Any fault arising from in-
correct wiring cannot be put right under the terms of
the
Saunier Duval
guarantee.
External controls
The boiler will work for heating without a room ther-
mostat and/or timeswitch being connected provid-
ed that the wire link fitted between the top two ter-
minals of the connector is left in place, see diagram
14
.
A 230V room thermostat can be used but do not
make any connection to the compensating resistor,
see diagram
14
.
ON NO ACCOUNT must any electrical voltage be
applied to any of the terminals of the external con-
trols plug.
For use with a timeswitch or timeswitch and room
thermostat see diagram
14
.
All models
In case of difficulty obtaining a suitable timeclock/
room thermostat, a programmable room thermostat
is available as an accessory,
Saunier Duval
part
number 40010. Please contact your supplier.
Diagram 14
No external controls
Room thermostat only
Room thermostat and time clock
Factory
fitted link
Boiler
connector
Voltage free room
thermostat
Time clock
Do not
connect
External controls
plug
Voltage free room
thermostat
Do not
connect
External
controls plug
Warning:
- All external controls must be voltage free
- On no account must any external voltage
be applied to any of the external controls
plug terminals
EXTERNAL CONTROLS CONNECTIONS
