Checking The Fan Unit; Supply Cord (120 Vac) - Buderus Logamax plus GB142-24 Installation And Servicing Instructions

Servicing
Connect the heating system to the power supply,
insert the main fuse or switch on the circuit breaker.
Set the main switch on the BC10 to "1" (On).
Start up the appliance.
Check that while the operating code
displayed, 120 VAC is available on the outer two
contacts (blue and brown) of the plug (see fig. 47).
Disconnect the heating system from the power
supply, remove the main fuse or switch off the circuit
breaker.
Set the main switch on the BC10 to "0" (Off).
Reconnect the plug to the fan unit.
Fit the casing.
Connect the heating system to the power supply,
insert the main fuse or switch on the circuit breaker.
Set the main switch on the BC10 to "1" (On).
14.4 Checking the fan unit; Supply cord
(120 VAC)
WARNING!
Avoid damage: do not push the measuring
pin of the volt-ohm-multiammeter too
deeply into the socket.
Remove the casing.
Disconnect the heating system from the power
supply, remove the main fuse or switch off the circuit
breaker.
Set the main switch on the BC10 to "0" (Off).
Disconnect the 120 VAC plug of the fan unit.
Loosen the fastening screw of the UBA3 (see fig. 48,
pos. 1).
Remove the UBA3 by pulling it forward as indicated
by the arrow (see fig. 48, pos. 2).
Set the volt-ohm-multiammeter to "Resistance
testing".
Test the fan unit supply cord to make sure that there
is no short circuit in it and that it is not broken
anywhere (see fig. 49 and fig. 25 on page 26).
Reconnect the plug to the fan unit.
Re-assemble the UBA3 in reverse order of
disassembly.
Connect the heating system to the power supply,
insert the main fuse or switch on the circuit breaker.
Set the main switch on the BC10 to "1" (On).
Fit the casing.
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
is
1
Fig. 48 Dismantling the UBA3
Fig. 49 UBA3 installation base
2
Buderus Hydronic Systems • http://www.buderus.net
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