Electrical Connections - Saunier Duval Xeon 18 HE Instructions For Use Installation And Servicing

ELECTRICAL CONNECTIONS

WARNING: This boiler must be earthed.
This appliance must be wired in accordance with
these instructions. Any fault arising from incorrect
wiring cannot be put right under the terms of the
Saunier Duval guarantee.
All system components must be of an approved
type.
Electrical components have been tested to meet
the equivalent requirements of the BEAB.
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
switched fused spur box having a minimum contact
separation of 3mm on each pole. The fused spur
box should be readily accessible and preferably
adjacent to the boiler. It should be identified as
to its use.
A fused three pin plug and shuttered socket
outlet may be used instead of a fused spur box
provided that:
a) They are not used in a room containing a fixed
bath or shower.
b) Both the plug and socket comply with the current
issue of BS1363.
The mains electrical supply must be maintained at
all times in order to provide domestic hot water.
Do not interrupt the mains supply with a time
switch or programmer.
9.1 External controls (Mains Voltage)
Important: If a replacement supply cable is required
it must be purchased. Part No. S1008600.
Ensure that a separate external controls cable and
pump supply cable are fed to the boiler.
Refer to wiring diagram in section 12.
All HE boilers are fitted with a connection box
located at the base of the boiler into which all
connections are made.
To gain access to the connection box remove the
two retaining screws indicated in Diagram 9.1 and
carefully lower and pull forward the box to reveal
the terminal strip inside.
Remove the test cable from the terminal strip
and discard.
Connect both the mains supply and switched live
from the external controls (room thermostat and,
if applicable, frost thermostat) into the marked
terminals as shown in diagrams 9.2 and 9.3.
If a room thermostat is not fitted, then the
connecting link must be fitted between terminals
1 and 2, see diagram 12.2.
Connect the pump supply into the marked pump
terminals as shown in diagram 9.2.
Observe all terminal markings and colour codes
as shown in diagram 12.2.
NOTE: The boiler incorporates a pump overrun
thermostat. Only feed the pump from the marked
terminals in the connection box on the boiler, not
from a separate supply.
Ensure that all flexible cords are routed through
the strain relief cable glands on the inlet of the
connection box.
Refit the connection box to the underside of the
boiler using the two retaining screws.
RETAINING
SCREWS (2)
CONNECTION
BOX
30
Diagram 9.1