Technical data

11
ELECTRICAL CONNECTION
Warning: This boiler must be earthed.
All system components must 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
switched fuse spur box having a minimum contact
separation of 3 mm 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 the fused spur box, provided
that:
a) They are not used in a room containing a 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 and
frost protection
Note: For further information, see The Building
Regulations 1991 - Conservation of fuel and power
- 1995 edition - Appendix G, table 4b.
INSTALLATION INSTRUCTIONS
DO NOT INTERRUPT THE MAINS SUPPLY TO THE BOILER
WITH A TIME SWITCH OR PROGRAMMER.
The combitek F 23 E is delivered with 1metre mains
supply lead ready connected.
External controls
The boiler will work for heating AS DELIVERED without
a room thermostat fitted provided the two wires on
the integral external controls connection REMAIN
LINKED TOGETHER (as supplied).
If a room thermostat is required, it must be connected
as shown below and the link must be removed.
ANY ROOM THERMOSTAT USED MUST BE OF THE VOL-
TAGE FREE TYPE.
WARNING: ON NO ACCOUNT MUST ANY ELECTRICAL
VOLTAGE BE APPLIED TO EITHER OF THE TERMINALS OF
THE EXTERNAL CONTROLS CONNECTION
WARNING: This boiler must be wired in accordance
with these instructions. Any fault arising from incor-
rect wiring cannot be put right under the terms of the
guarantee.
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E
°C
For no external controls
leave wire link (E) in place
When fitting an external control,
remove wire link (E) and connect
voltage free thermostat as shown
Diagram 13
The mains electrical cable is supplied
with the boiler. It is coiled and tucked
inside the boiler
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