Installation
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26
Installation and maintenance instructions for Buderus 500 - 24/S • 08/2006
Buderus • http://www.buderus-domestic.co.uk
Subject to modifications resulting from technical improvements!
1.10.4 External 230V controls (see also Y-plan and S-plan
on page 28 and 29)"
z
Connect the black pre-wired lead to a permanent live
supply (from the same fused isolator as all other controls
on the heating system), L N E (fig. 24).
z
Remove the securing screw of the DBA and lower the DBA
(see fig. 31).
z
Remove the cover of the rth-converter (fig. 33, item 1).
z
Feed the 230V switch live and neutral (from external
controls) through the cable gland.
z
Identify the 230V terminal block by the shaded area and
230V label.
z
Connect the switch live to terminal "1" and a neutral to
terminal "2" (fig. 33, item 2).
z
Replace covers.
1.10.5 Volt free external control device connection
z
Connect the black pre-wired lead to a permanent live
supply (from the same fused isolator as all other controls
on the heating system), L N E (fig. 24).
z
Remove the securing screw of the DBA and lower the DBA
(see fig. 31).
z
Remove the cover of the rth-converter (fig. 33, item 1).
z
Lead the control device wire through the cable lead.
z
Fix the wire to terminal 1 and 2
of the volt free connection
(fig. 33, item 3).
fig. 33 Connection box - 230 Volt and Volt free connection
2
1
3
WARNING!
This appliance must be earthed.
NOTE
Terminal 3 (fig. 33, item 2) is not used.
