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Servicing 14
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We reserve the right to make any changes due to technical modifications!
Installation and Servicing Instructions Logamax plus GB142-24/30/45/60 • Version 12/2004
Buderus Hydronic Systems • http://www.buderus.net
z Remove the heat exchanger by grabbing its bottom
end and pulling forward and then pushing it upwards
(see fig. 136, pos. 1).
z Assemble the new heat exchanger and all other parts
in reverse order of disassembly.
z Open the gas shut-off valve (see fig. 137, pos. 2)
z Connect the heating system to the power supply,
insert the main fuse or switch on the circuit breaker.
z Set the main switch on the BC10 to "1" (On).
z Also check all joints and gaskets affected by the
replacement activities while carrying out the tight-
ness test in operating conditions.
z Set the gas/air ratio again.
See Chapter 9.8, page 31.
14.30 UBA3; replacing
z Disconnect the heating system from the power
supply, remove the main fuse or switch off the circuit
breaker.
z Set the main switch on the BC10 to "0" (Off).
z Remove the casing.
z Loosen the fastening screw of the UBA3
(see fig. 138, pos. 1).
z Pull the UBA3 forward in the direction indicated by
the arrow (see fig. 138, pos. 2).
z Install the new UBA3.
z Tighten the fastening screw again.
z Fit the casing.
z Connect the heating system to the power supply,
insert the main fuse or switch on the circuit breaker.
z Set the main switch on the BC10 to "1" (On).
Fig. 136 Dismantling the heat exchanger
1
NOTICE!
Fill and purge the Logamax plus GB142 as
required. See page 28.
Fig. 137 Gas shut-off valve closed (1),
gas shut-off valve open (2)
Fig. 138 Dismantling the UBA3
1
2
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