SOLID STATE ECONOMIZER SYSTEM
3 63-2484—03
SPECIFICATIONS
IMPORTANT
The specifications given in this publication do not
include normal manufacturing tolerances. Therefore,
these units may not exactly match the specifications
listed. Also, these products are tested and calibrated
under closely controlled conditions and some minor
differences in performance can be expected if these
conditions are changed.
Models:
Specifications for each model are listed separately.
C7046 Discharge Air Sensors
Intended for use as a discharge sensor in rooftop applications.
Sensing Element:
Carbon type, thermistor-resistor element.
Performance Characteristics:
Reaction Time Constant with Air Approach Velocity of
8.33 ft/sec (2.54 m/sec): 60 seconds.
Resistance/Temperature (NTC):
Nominal Resistance: 3000 ohms at 77°F (24°C). Nominal
Sensitivity: 70 ohms per degree F (124 ohms per degree
C) at midrange.
Mounting Arrangement:
Integral mounting flange that requires two no. 8 screws
(not provided).
Maximum Ambient Temperature:
250°F (121°C).
Operating Temperature Range:
40°F to 150°F (4°C to 66°C).
Wiring Connections:
6 in. (152 mm) leadwires.
Dimensions:
See Fig. 1.
C7150B Mixed Air Sensor
Used to sense mixed air in rooftop packaged air conditioning
equipment.
Resistance/Temperature (NTC):
Nominal Resistance: 3000 ohms at 77°F (24°C). Nominal
Sensitivity: 70 ohms per degree F (124 ohms per degree
C) at midrange.
Maximum Ambient Temperature:
250°F (121°C).
Operating Temperature Range:
-40°F to +110°F (-40°C to +44°C).
Dimensions:
See Fig. 2.
C7400 Solid State Enthalpy Sensor/C7660
Solid State Temperature Sensor
Senses enthalpy or temperature of outdoor and return air.
Temperature Sensing Element:
Thermistor.
Output Signal:
C7400: 4 to 20 mA current signal; increases from 4 mA to
20 mA as enthalpy decreases.
C7660: 4 or 20 mA signal; 4 mA not OK to economize and
20 mA OK to economize.
Ambient Operating Temperature Range:
-40°F to +125°F (-40°C to +52°C).
Approval:
Underwriters Laboratories Inc. Flammability Rating: UL94-5V.
Dimensions:
See Fig. 3.
Fig. 1. Approximate dimensions of C7046C Air Temperature Sensor in in. (mm).
9/16
(14)
7/8
(22)
3/4 (19)
1-1/2 (38)
1/2 (13)
DIAMETER
1/4 (6)
DIAMETER
(2)
3/8 (10)
DIAMETER
IMMERSION LENGTH: 8 (203)
M9087
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