COM.AIR
Dew Point Monitor
04/02/2015
Rev. B
4
1.0 GENERAL DESCRIPTION
The Edgetech Instruments Model COM.AIR is a chilled mirror based hygrometer designed
especially to monitor the dew point in compressed air systems.
It is an integrated system including a microprocessor-based instrument, a chilled mirror dew
point sensor, a sample flow meter and valve, and associated tubing and fittings.
The wall mount enclosure is easily mounted to any vertical surface.
The Instrument includes:
An eight-digit, alphanumeric, LED display to report the dew point and system status.
Periodic sensor balance check.
Programmable Alarm Set Point with visual, audible, and contact closure alarm indications.
A SPDT (Form C) Alarm Relay.
A 4 to 20mA analog output.
2.0 INSTALLATION
2.1 MOUNTING
The COM.AIR can be installed on any flat vertical surface with four ¼ inch screws. See Figure
2-1 for dimensional information.
2.2 WIRING CONNECTIONS
The COM.AIR is designed to operate on AC voltages of 90 to 260 VAC with a maximum power
requirement of 40 Watts. The power entrance hole, located on the bottom of the enclosure, is
designed to accept a standard conduit, clamp type fitting or a compression type fitting
(supplied). The power line connections to the instrument are made using pigtail leads and wire
nuts.
Connect the power leads as follows:
1. Remove the three thumbscrews and the access cover as shown in Figure 2-2
2. Pull the three wires, black, white and green out of the wire box as shown in
Figure 2-3.
3. Insert the power line wires into the bottom of the enclosure and feed them up
through the wire box and out the access opening. Strip the wire ends back about
½". Using the three wire nuts, connect the wires black to black, white to white
and green to green. Tighten the wire nuts securely, making sure there are no
exposed wires.
4. Push the wires down into the wire box.
2.3 SAMPLE CONNECTIONS
The sample may be brought to the instrument with ¼" copper, stainless steel, or plastic tubing
and terminated in a ¼" female fitting.
Connect the sample supply line to the ¼" tubing fitting located on the top of the sensor. The
return line connect to the 1/4'” female fitting on the top of the enclosure Figure 2.2).
NOTE:
The maximum inlet pressure is 150 PSIG.
Summary of Contents for COM.AIR
Page 6: ...COM AIR Dew Point Monitor 04 02 2015 Rev B 6 FIGURE 2 1 MOUNTING ...
Page 7: ...COM AIR Dew Point Monitor 04 02 2015 Rev B 7 FIGURE 2 2ACCESS PANEL REMOVAL ...
Page 8: ...COM AIR Dew Point Monitor 04 02 2015 Rev B 8 FIGURE 2 3WIRING CONNECTIONS ...
Page 12: ...COM AIR Dew Point Monitor 04 02 2015 Rev B 12 FIGURE 4 1SETUP ...
