Zehnder Rittling ComfoAir Q, Installer Manual

Page: 33 / 52

32 - EN EN - 33
9.7 How to gain access to the mid-section sensor
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Remove the modulating by-pass valve
as instructed in its relevant chapter:
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Open the semi-transparent visor;
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Change the unit to SERVICE MODE;
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Disconnect the power to the unit;
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Remove the 3 screws of the front
cover;
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Remove the front cover;
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Pull the strap of the heat exchanger.
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Pull the clamp, located at the back
of the valve, away from the valve.
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While holding the clamp away from
the valve pull the valve towards you.
Release the connection joint of the
modulating by-pass valve. Remove the insulation cover behind
the modulating by-pass valve.
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Remove the fan connectors from the
sensor cover.
Remove the sensor cover by opening
the snap connection.
During installation: Place the
sensor cover underneath the
guide rails and place the fan
connectors back. This will
guarantee a good fit of the
insulation cover.
Remove the connector for the sensor Pull the sensor up out of its rubber
pressure sensor holder.
Then pull the sensor sideways and out
of the sensor compartment.