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1.8
Electrical connections
1.8.1
Mains connection
NOTE
All Buderus boilers require a
permanent live.
A mains supply of 230 V - 50Hz is required.
External controls are suitable for volt free or 230 V installation.
Wiring to the boiler MUST be in accordance with the current
I.E.E. (BS.7671) Wiring Regulations and any local regulations.
Wiring should be a 3 core PVC insulated cable, not less than
2
(24 x 0.2 mm), and to table 16 of BS.6500.
0.75 mm
Connection must be made in a way that allows complete isola-
tion of the electrical supply such as a double pole switch
having 3 mm contact separation in both poles, or by a three pin
connector, serving only the boiler and system controls. This
boiler is equipped with a double pole switch see fig. 24, item 1.
The means of isolation must be accessible to the user after
installation.
The electrical connection to the mains supply should be readily
accessible and adjacent to the boiler.
If the supply cord is damaged, it must be replaced by a regis-
tered Corgi installer to avoid a hazard and must be an original
spare part.
The electrical supply for both the boiler and the system must
be taken from the same fused spur outlet.
WARNING!
Do not connect 230V to the connection block
on the back of the DBA.
1.9
DBA wiring diagram
JP1 JP2
JP4
JP3
WARNING!
Do not connect 230V to the connection block on the back of the DBA.
Subject to modifications resulting from technical improvements!
Installation and maintenance instructions for Buderus 500 - 24/S • 08/2006
fig. 24 DBA
JP1
JP2
High voltage
DBA
Installation
ON
OFF
1
JP4
Low voltage
Buderus • http://www.buderus-domestic.co.uk
1
JP3
21
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