Air Pressure Switch - Rendamax R3400 Notice D'installation Et D'emploi

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Commissioning

Air pressure switch

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Adjustment Air pressure switch
Connect a pressure gauge to the indi-
cated measuring points on the switch
(1). Start the boiler at service mode for
minimum load operation (W1). Measure
the pressure differential across the
switch, this should be ≈ 0.8 mbar. Turn
the dial on the switch (2) counter-
clockwise until the end. Reduce the
setting on parameter P17 step by step
until the pressure differential is 0.4
mbar. Slowly turn the dial on the switch
clockwise until the boiler goes to lock-
out. Set P17 back to its original setting!!
Reset the lockout. Restart the boiler
and check if the switch contact closes
at 0.4 mbar (indicator at DW in display
of the boiler controller (3). If required,
repeat the above procedure.
2

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