Installation
1
Installation and servicing instructions condensing gas boiler 800 - 24/29/43/60 and 800 - 24T25/29T25 H/V • edition 02/2006
17
Subject to modifications resulting from technical improvements !
Buderus • http://buderus-domestic.co.uk
1.9
Electrical connections
1.9.1
Mains connection
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
0.75 mm
2
(24 x 0.2 mm), and to table 16 of
BS.6500
.
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 (1/8'') 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. 19, 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.
fig. 19 UBA
1
NOTE
All Buderus boilers require a
permanent live.
WARNING!
Do not connect 230V to the connection block
on the UBA.
