Checking The Gas Control Valve; Cable Connections - Buderus Logamax plus GB142-24 Servicing Instructions

8 Actions

8.1.18 Checking the gas control valve; cable connections

 Switch off the power supply of the heating system on the circuit
breaker.
 Set the main switch on the BC10 to "0" (Off).
 Remove the casing.
 Check that the plug of the gas control valve has been installed
correctly (see fig. 32, pos. 1).
 Fit the casing.
 Switch on the power supply of the heating system on the circuit
breaker.
 Set the main switch on the BC10 to "1" (On).
8.1.19 Checking the gas control valve; Control
NOTICE
You can drive the burner (the gas valve) using the
relay test in combination with the RC control
device. See installation and maintenance instruc-
tions of the RC control device.
WARNING!
Avoid damage: do not push the measuring pin of
the volt-ohm-multimeter too deeply into the socket.
 Remove the casing.
 Switch off the power supply of the heating system on the circuit
breaker.
 Set the main switch on the BC10 to "1" (On).
 Start up the boiler in accordance with the "Flue gas test" menu.
See page 10 "Flue gas test" menu.
 Use a volt-ohm-multimeter to check that, while operating code
[0/l/\| is displayed, there is a voltage on the plug of the gas
control valve. The test must indicate a voltage of 20 – 24 VDC
both when testing on the central and left contacts and when
testing on the central and right contacts (see fig. 33).
 Fit the casing.
98 Logamax plus GB142-24/30/45/60 - We reserve the right to make any changes due to technical modifications!
fig. 32 Checking the cable connections to the gas control
valve (e.g. HONEYWELL gas control valve)
fig. 33 Voltage testing on the gas control valve
1