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5
Servicing
Remove the venturi (fig. 69).
Insert the venturi into the new fan and reassemble in
reverse order.
Check all couplings for leaks.
5.3.4
Checking the mains supply
If the mains supply is interrupted or seems faulty, carry out a
power test procedure for safe testing of the mains electrical
supply.
Loosen the screw (fig. 62, item 1) and remove the UBA
(fig. 62, item 2).
Carry out the power test on position 15 and 16 of the high
voltage pin connector (fig. 62, item 3).
Refit the UBA and tighten the screw.
5.3.5
Checking the fuse
Disconnect the system from the mains power supply.
Remove the UBA (see fig. 62).
Release the fuse clamp (fig. 71, item 2) by turning it to the
left with a screw driver.
Remove and check the fuse (fig. 71, item 1).
Replace with a new fuse (2.5 AT) if necessary.
Reassemble in reverse order.
Subject to modifications resulting from technical improvements!
50
Installation and maintenance instructions for wall-mounted condensing gas boiler 600 - 28C • 01/2004
fig. 69 Remove venturi
fig. 70 Checking the mains supply
2
fig. 71 Checking the fuse
Boulter Buderus Ltd. • http://www.boulter-boilers.com
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