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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 plug of the gas control valve (see
fig. 73).
z Loosen the fastening screw of the UBA3 (see fig. 74,
pos. 1).
z Pull the UBA3 forward in the direction indicated by
the arrow (see fig. 74, pos. 2).
z Test the resistance of the cable between the plug of
the gas control valve and the UBA3 installation base
(see fig. 75, fig. 76 and circuit diagram, fig. 25 on
page 26).
z Reconnect the plug to the gas control valve (see
fig. 73).
z Re-install the UBA3 (see fig. 74).
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. 74 Dismantling the UBA3
1
2
Fig. 75 Testing the cable between the gas control valve and
the UBA3 installation base
Fig. 76 UBA3 installation base
Pin 1
28
55
Pin 81
Pin 16
Pin 1
KIM
16-pole connector
81-pole connector
63


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