Boulter Buderus 500 Series Installation And Maintenance Instructions Manual page 26

1 Installation
1.10.3 External 230V controls
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. 30).
Remove the cover of the rth-converter (fig. 32, 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. 32, item 2).
Replace covers.
NOTE
Terminal 3 (fig. 32, item 2) is not used.
1.10.4 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. 30).
Remove the cover of the rth-converter (fig. 32, 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. 32, item 3).
Subject to modifications resulting from technical improvements!
26 Installation and maintenance instructions for Buderus 500 - 24/C and 500 - 28/C • 02/2005
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2
fig. 32 Connection box - 230 Volt and Volt free connection
Boulter Buderus Ltd. • http://www.boulter-buderus.co.uk
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