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AERCO Control System (ACS)
CHAPTER 2
: ACS Installation
Page 20 of 139
AERCO International, Inc.
•
100 Oritani Dr.
•
Blauvelt, New York 10913
11/22/2017
GF-131
Phone: 800-526-0288
OMM-0081_0F
PROBE DEPTH MUST
EXTEND AT LEAST 2"
INTO PIPE
WELDED 1/2"
COUPLING OR
4"x4*x1/2"
T - FITTING
HEADER SENSOR
WITH THERMOWELL
INSTALLED
Figure 2-3: Header Sensor Installation Details
2.5.3 Outdoor Air Sensor Installation
The Outdoor Air Temperature Sensor (P/N GP-122662) is required when operating in the ACS
in the Outdoor Reset Mode (paragraph 4.2). An Outdoor Air Sensor Kit (P/N GM-122781) is also
available. This kit contains the Sensor (GP-122662) and a Mounting Bracket for wall mounting.
The Outdoor Air Sensor should be mounted on the North side of the building, shielded from
direct sunlight, and away from air intakes or outlets from the building. Shielded pair 18 AWG
cable (Belden # 8760 or equiv.) is recommended for sensor wiring. The Outdoor Air Sensor can
be mounted up to 600 feet from the ACS. See instructions below.
NOTE
The Outdoor Air Sensor is a thermistor type sensor. The Resistance
vs. Temperature Chart for this sensor is provided in Appendix E.
Length of Header Sensor wire leads should not exceed 600 feet.
Installing the Outdoor Air Sensor
1.
Refer to Figure 2-4 for a typical Outdoor Air Sensor installation.
2.
Attach the sensor to the mounting bracket and secure the bracket in a suitable location on
the North side of the building.
3.
Using shielded pair cable (Belden #8760 or equiv.), connect the two Sensor leads to
terminals 1 and 2 on the ACS. There is no polarity to observe when connecting the sensor.
4.
Terminate the cable shield at SHLD terminal 3 of the ACS. DO NOT terminate the shield at
the Sensor end of the cable.