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