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Modifications to these settings may be made during installation even with the burner working by pro-
ceeding as follows:
CAM ST2: to increase the aperture of the air intake damper rotate the cam clockwise (+). Vice-versa,
rotate anticlockwise (-) to reduce the air flow.
CAM ST1: to increase the aperture of the air intake damper rotate the cam clockwise (+). Vice-versa,
rotate anticlockwise (-) to reduce the air flow.
CAM MV: to delay the aperture of the 2nd stage solenoid valve rotate the cam clockwise (+). Vice-
versa, rotate anticlockwise (-) to advance aperture.
FOR VERSIONS JM 18/2L
COMPACT VALVE SEAL CONTROL DEVICE VP5
504
A seal control device to attach to the MULTIBLOK unit
is available on request.
CALIBRATION OF AIR PRESSURE SWITCH
The air pressure switch serves as failsafe or lock-out for
the burner if comburent air pressure is cut off. It should
be calibrated at approximately 15% lower than the air
pressure level inside the burner when the latter is opera-
ting at its rated output on 1st stage, and by ensuring that
the CO figure remains lower than 1%.
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