multi EA 5100
Maintenance and care
137
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Insert the septum and screw the screw cap back onto the combustion tube.
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Replacing the septum on the combustion tube is now complete.
14.7 Replacing the check valves and particle filters
14.7.1 Replacing the check valves on the gas box
The check valves must be replaced if the gas flow can no longer be set to the target
value (observe the message in the software) and possible leaks in the system have been
excluded. The check valves are located in the valve block on the gas box on the left side
of the device.
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Switch off the basic module and disconnect the power plug from the
power outlet.
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Switch off the gas supply at the shut-off valve.
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Remove the protective ground conductor on the left side panel. Loosen
the 4 screws on the left side panel and lift off the side panel.
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Pull hoses 3 and 4 out of their connections on the valve block (see ar-
rows).
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Unscrew the screw on the valve block with a 2.5 mm hexagon socket
wrench.
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Remove the top part of the valve block and take the check valves out of
the "main" and "inlet" connections.
