Servicing
5
50
Installation and maintenance instructions for wall-mounted condensing gas boiler 600 - 28C • 01/2004
Subject to modifications resulting from technical improvements!
Boulter Buderus Ltd. • http://www.boulter-boilers.com
z
Remove the venturi (fig. 69).
z
Insert the venturi into the new fan and reassemble in
reverse order.
z
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.
z
Loosen the screw (fig. 62, item 1) and remove the UBA
(fig. 62, item 2).
z
Carry out the power test on position 15 and 16 of the high
voltage pin connector (fig. 62, item 3).
z
Refit the UBA and tighten the screw.
5.3.5
Checking the fuse
z
Disconnect the system from the mains power supply.
z
Remove the UBA (see fig. 62).
z
Release the fuse clamp (fig. 71, item 2) by turning it to the
left with a screw driver.
z
Remove and check the fuse (fig. 71, item 1).
z
Replace with a new fuse (2.5 AT) if necessary.
z
Reassemble in reverse order.
fig. 69 Remove venturi
fig. 70 Checking the mains supply
Pin
1
28 55
Pin
81
Pin
16
Pin
1
KIM
81 pin lo
w v
oltage
16 pin high v
oltage
3
fig. 71 Checking the fuse
1
2
