FScurtis RNP100, Operator'S Manual

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4
INSTRUMENTATION
ON/OFF Switch
The dryer is equipped with an ON/OFF switch on the front
panel. A light signals when the dryer is on.
Dew Point Indicator
(75 through 150 scfm models)
All dryers are equipped with a dew point indicator which
indicates dryer conditions as follows:
It is normal for the dew point indicator to be in the red zone
when the dryer is first turned on and then move to the
green zone when the dryer reaches its normal operating
temperature. If this indicator is in the red zone during
normal operation, turn the dryer off to avoid compressor
damage. Refer to the Field Service Guide for additional
information, or call your local distributor.
Dryer System Monitor (DSM)
(200 through 5000 scfm models)
The Dryer System Monitor (DSM) has LED type dew point
temperature indicators and electronic drain valve timing
controls. When the dryer is running normally, the green LEDs
will illuminate. If the red LED is illuminated, there is a need
for the dryer's operating condition to be checked.
NOTE:
When the dryer is turned on, all LEDs will be
illuminated. Allow 15 minutes for the red and yellow LEDs to
be extinguished.
The automatic drain valve controls allow the period of drain
opening to be set from 0.5 seconds to 9 seconds and drain
valve closed time to be set from 0.5 minutes to 9 minutes.
When the "PUH TO TEST" button is pushed, the drain valve
opens and remains open for the adjusted "open" time.
Automatic
Drain Valve
All models are equipped with an electronic drain valve that
automatically discharges condensate from the dryer. Drain
valve operation is controlled by a drain valve timer. The drain
opening can be set from 0.5 seconds to 9 seconds. The drain
cycle can be set from 0.5 minutes to 9 minutes.
Models 75 through 150 have the timer mounted directly on
the drain valve. For models 200 through 500, drain valve
adjustments are made on the Dryer System Monitor (DSM).
Electronic Drain Valve Adjustment
To minimize air losses, the drain valve control time should
be adjusted to open the drain port just long enough to
discharge accumulated condensate. Set the drain valve
operating time so that only air discharges at the end of the
open period. Recommended initial settings are a 1 to 2
second drain opening and 30 seconds drain closed time. If
liquid still discharges as the port is closing, set the timer for a
shorter cycle or a longer opening.
timer should be adjusted to open the drain port just long
enough to discharge accumulated condensate. Set the timer
so that only air discharges at the end of the open period.
Dew Point Indicator
(Models RNP75, RNP100, RNP125 and RNP150)
3 4
2
1
5
Drain Timer
(Models RNP75, RNP100, RNP125 and RNP150)
1. Adjustment knob for the drain valve open time. The
values on the dial correspond to the time in seconds
that the valve is open in each drain cycle.
2. Adjustment knob for the drain valve closed time. The
values on the dial correspond to the time in minutes
that the valve is closed in each drain cycle.
3. LED to indicate when the drain valve is open.
4. Drain test button. When the button is pressed, the
drain valve opens for the time corresponding to the
setting on item 1.
5. LED to indicate when the drain valve is closed.