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ELECTRICAL SUPPLY
Electrical Supply
230V 1 Phase 50Hz (Fused 3 amp)
Note: THIS APPLIANCE MUST BE EARTHED
All electrical wiring must be carried out by a qualified electrician in
accordance with current I.E.E. Regulations and any Local
Regulations that may apply. The 230v - 50Hz electrical supply to the
unit and auxiliary controls must be fused by a double pole switch
with a contact separation of at least 3mm in both poles and
shuttered socket (both complying with the requirements of BS 1363)
adjacent to the boiler. Fuse supply at 3 amp. The minimum
requirement for the power supply cable should be a PVC sheathed
flexible cord, at least 0.75mm 2 (24x0.2mm) (code designation
H05 VV-F or H05 VVH2-F) as specified in table 16 of BS 6500.
The appliance MUST be earthed and the electrical supply earth
cable must be of a greater length than the current carrying
conductor cables (ie live and neutral supply cables). All external
cables entering the appliance must be secured in position by
strain relief bushes supplied (see diagram on how to secure cable).
Terminal connections are also provided in the control panel for
ancillary controls.
See wiring diagram. Fig 3 Page 25
Warning - High and Low Voltage
In certain parts of the country, where there is a known risk of high
or low voltage fluctuations, the gas burner shall be prevented from
starting by the use of a voltage sensitive device if the voltage drops
or increases sufficiently to endanger installation.
CABLE FIXING GLAND
1
2
B4
S3
T2
T1
N
L1
SWITCH LIVE TO BOILER. FROM EXTERNAL
CONTROLS FROM PROGRAMMER/STATS/ZONE
VALVES IF FITTED. (FROST STAT MAY BE FITTED
TO S3 IF REQUIRED)
LINK WIRE ‘A’ - REMOVE IF BOILER
EXTERNAL CONTROLS ARE FITTED
FUSED 3A PERMANENT SUPPLY