Kutzner + Weber MUC, Руководство по установке

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MUC IOM
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Operation - Inputs and Outputs
Enable Input
The MUC has an Enable terminal point that receives a constant 24VDC signal for
normal operation but if disconnected by a remote switch the MUC immediately disables
the gas relay. After a 60 second delay the MUC enters the OFF mode without regard to
the slide pot position.
If the Enable input is re-energized before the delay expires the MUC will enter RUN
mode when all requirements for run are met and energizes the gas relay to closed
position.
Prover Input
The MUC has a Prover terminal point that receives a constant 24VDC signal for normal
operation but if disconnected by a remote switch the MUC after a 15 second delay
enters Fail mode and disables the gas relay.
This input is ignored in OFF mode.
Fan Motor Control
The MUC controls the fan motor speed via a 0-10VDC signal and is set by the slide
potentiometer mounted on the unit. Adjusting the slide potentiometer to the right
enables the MUC and increases the fan speed. Adjusting the slide potentiometer to the
left will decrease motor speed until the signal output is <1.5VDC which places the MUC
into Off mode.
RPM Frequency Monitoring
The MUC will provide a constant 5VDC excitation voltage to the fan motor to receive
back a pulse train of 36 pulses per revolution. 60 pulses per second = 100 RPMs
When the motor frequency feedback is >150 pulses per second the motor frequency
requirement is proven for run operation.
This input is ignored in OFF mode.
A Bypass jumper is available to disable
the MUC motor RPM frequency
feedback monitoring requirement for run
operation. To enable the RPM Bypass
Enable, the 2 position jumper for RPM
Bypass Enable needs to be put in the
RPM Bypass On position as illustrated
in figure 8. The jumper should short the
middle pin with the right pin marked
“ON.”
ON
RPM Bypass Enable
Jumper Select
OFF
2 Position Jumper
JUMPER
OFF
ON
Figure 8