Temperature Sensors (Ntcs); Main Heat Exchanger - Vaillant TURBOmax Pro 28 Instructions For Installation And Servicing

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Fig. E.6: NTCs
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Fig. E.7: Main heat exchanger
4
6
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PARTS REPLACEMENT
Temperature sensors
(NTC'S)
Refer to the important information
and initial preparation on page 45.
Identify which sensor(s) is to be
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replaced.
If required remove combustion
chamber cover by unclipping the
three clamps.
Pull off connecting wire from sen-
sor.
Unscrew NTC sensor (1 or 2).
Replace NTC sensor.
Reassemble in reverse order.

Main heat exchanger

Refer to the important information
and initial preparation on page 45.
Release central heating water
pressure.
Remove combustion chamber cover
by unclipping the three clamps.
Remove four screws (4) and pull off
combustion chamber front panel.
Remove the fan, the locating spring
and the fan hood.
Pull off the flow clamp (5) and
disconnect the return connection.
Remove the main heat exchanger
(6), disconnect the return
connection by removing the clamp
(5) and pulling the pipe away from
the heat exchanger.
Reassemble in reverse order.
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