Ohming Out The Gas Control Valve - Buderus Logamax plus GB142-24 Installation And Servicing Instructions

14 Servicing

14.20 Ohming out the gas control valve

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).
Remove the casing.
Remove the plug of the gas control valve
(see fig. 77).
Set the volt-ohm-multiammeter to "Resistance
testing". Use a scale of 200
Test the resistance of both coils of the gas control
valve using the volt-ohm-multiammeter. The resis-
tance measured between the left and central
contacts (see fig. 78) must be approx. 75
between the right and central contacts (see fig. 79)
this must be approx. 185
case, the gas control valve will probably be defective.
It must then be replaced.
Attach the plug to the gas control valve.
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).
We reserve the right to make any changes due to technical modifications!
64
or greater.
and
(+/- 10 ).If this is not the
Installation and Servicing Instructions Logamax plus GB142-24/30/45/60 • Version 12/2004
Fig. 77 Removing the gas control valve plug
Fig. 78 Testing the resistance on the gas burner ass'y (1)
Fig. 79 Testing the resistance on the gas burner ass'y (2)
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