Champion CRN Series Instruction Manual page 7

2.8 Electronic Demand Drain – I-Controller Level 3
A. An automatic electric demand drain (EDD)
discharges condensate removed by the
separator.
B. All standard I-Controller Level 3 models are supplied
with one EDD. Models with the additional (optional)
cold coalescing filter are supplied with a second EDD.
C. For manual draining, convenient dryer
depressurization, and EDD service, a three-way valve
at the bottom of the moisture separator and before
the EDD is installed. For manual draining, turn the
valve handle so it is in a horizontal position. Open the
petcock on the side of the dryer base pan to
discharge the condensate or to depressurize the
dryer if it has been by-passed. The petcock can be left
in a throttled (partially opened) position should there
be a problem with EDD.
The drains are piped to the right side panel, bottom
right corner of the unit.
Discharge is at system pressure. Drain line
should be anchored.
NOTE: Condensate may contain oil. Comply with
applicable laws concerning proper disposal.
D. Verify that isolation valves are open. If the drain fails
to discharge after the valve is energized, the
electronic control circuit will repeatedly energize the
valve in an attempt to clear the discharge port. If,
after 60 seconds, the drain still fails to discharge, the
control circuit then switches to the alarm mode. In
this mode the valve is de-energized and the red alarm
light is activated on the drain and control panel and
the green LED on the process diagram. The valve is
then automatically energized every 4 minutes for 5
seconds. Check the drain operation. Push drain
(push-to-test) button on the I-Controller level 3
control panel to energize drain. A flow of condensate
and/or air should be present at the drain outlet. The
alarm mode automatically clears after the drain
returns to normal operation.
E. Condensate enters the reservoir (1) through the inlet
port. When the condensate level in the reservoir
covers the capacitance sensor, an electronic signal is
sent to the solid state countdown processor. The
processor delays the opening of the solenoid valve
for a given period of time. Once the time has
elapsed, the solid state processor transmits
information to energize the coil in the solenoid valve
(2).The magnetic force of the coil causes the solenoid
core (3) to move, closing the pilot air supply line and
opening the pilot air exhaust line. After the pilot air
above the diaphragm (4) is vented, pressure in the
reservoir opens the discharge port and forces the
condensate through the discharge port and outlet
piping.
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2.9 Operating Instructions – I-Controller Level 3
1. Check the following on a periodic basis:
a.
b. Compressor-on light glows (green) indicating the
c.
d. Warning/Maintenance Alert light (yellow) is NOT
e.
f.
2. ALARM/ALERT Fault Condition Activation
(See wiring diagram for N/O contact location.)
Upon activation, text identifying the Fault will be
displayed on the VFTD. An Audible Alarm will sound, a
Flashing Panel light (Warning/Yellow or, Alarm/Red)
and, a Flashing Process Diagram LED (Green or Red)
combine to indicate the fault condition. Where
applicable (see table 2 on page 17) a normally open
(N/O) circuit will activate a customer supplied remote
alarm.
NOTE: If yellow Alert light or, red Alarm light ARE flashing,
see fault condition identified in VFTD window. Reference
the condition in the Troubleshooting Guide on page 17.
3. AUTO RESTART Function
Software programming allows the dryer to
automatically restart in the event of an interruption
of power. Consult factory for details.
4. REMOTE START/STOP Function
Software programming allows the dryer to be
stopped and started by a remotely controlled signal.
Consult factory for details.
5. DOWNLOADABLE MEMORY Function
Software programming allows the dryer to store the
last 10 alarm related events. Output command
delivers the events complete with the date, time and,
fault condition. Consult factory for details.
6. RS-232 & RS-485 Communications Capable
Dedicated pin arrangement is used to monitor dryer
operation from a host computer. Consult factory for
details.
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3
4
Power-on light glows (green) indicating power to
the dryer
refrigeration compressor is operating
VFTD is automatically scrolling every 3 seconds
through OPERATION mode readings and settings
flashing
Alarm light (red) is NOT flashing
Condensate is draining
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