Saunier Duval THEMA F 23 E Installation Instruction

Warning. This boiler must be earthed
All system components must be of an approved
type.
The mains electrical cable is supplied with the boiler.
It is coiled ans tucked inside the boiler

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 con-
tact separation of 3 mm on each pole. The fused
spur box should be readily accessible and prefer-
ably 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 cur-
rent 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.

Warning: This appliance must be wired in accord-
ance with these instructions. Any fault arising from
incorrect wiring cannot be put right under the terms
of the Saunier Duval guarantee.

Time clock
A mechanical or digital time clock is available as
an accessory, Saunier Duval part N

°

 86148 (me-

chanical) or 86149 (digital).

External controls
The THEMA boiler is designed to operate at maxi-
mum efficiency at all times. The of a programma-
ble electronic room thermostat is recommended
for optimum performance, Saunier Duval part
number 40010. Please contact your supplier.

The boiler will work for heating without a room ther-
mostat and/or timeswitch being connected pro-
vided that the wire link fitted between the two ter-
minals of the connector (E) is left in place, see dia-
gram 19.

A 230V room thermostat can be used but do not
make any connection to the compensating resis-
tor, see diagram 19.
ON NO ACCOUNT must any electrical voltage be
applied to any of the terminals of the external con-
trols plug.

sch 229

sch 228

°

C

For no external controls

leave wire link (E) in place

When fitting room thermostat,

remove wire link (E) and connect

voltage free thermostat as shown

Diagram 19

sch 227

°

C

°

C

The mains electrical cable is supplied with the

boiler. It is coiled and tucked inside the boiler

Cylinder