Bryant DuraPac Series 580f - Manual (Page 19)

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The user can read the value of the sensor using the Read
mode, described in the EconoMi$er+ Controller section.
Mount the return air temperature sensor on the
EconoMi$er+, through pre-punched holes. See Fig. 27.
The return air temperature (RAT) sensor is provided with a
2-wire, 42-in. long wiring harness with a 2-pin connector. The
plug is installed on pins 5 and 6 on J3 of the EconoMi$er+
controller. The pins are labeled with a ground symbol and
RAT on the EconoMi$er+ controller. See Fig. 22. The red wire
of the harness is connected to pin 5 (ground). The black wire
of the harness is connected to pin 6 (RAT). The wiring har-
ness should be routed from the EconoMi$er+ controller to the
sensor. The controller compares the temperatures of the two
airstreams, chooses the best one, and modulates the
EconoMi$er+ actuator accordingly.
This 10K thermistor is used to measure the return air
temperature vs. resistance curve, per Table 5. The range of
temperature measurement is between 0° and 158 F. See
Table 6 for resolution.
K. Outdoor Air Humidity Sensor
The EconoMi$er+ controller accepts input from the accessory
outdoor air humidity sensor in addition to the outdoor air
temperature sensor shipped with the EconoMi$er+. By using
both sensors, the total enthalpy of the outside air is
calculated.
Mount the outdoor-air humidity sensor in to the
EconoMi$er+, through the pre-punched holes. See Fig. 28.
The outdoor-air humidity sensor is provided with a 2-wire,
42-in. wiring harness with a 2-pin connector. The plug is
installed on pins 11 and 12 on J3 of the EconoMi$er+ con-
troller. The pins are labeled ORH and VREF on the
EconoMi$er+ controller. See Fig. 22. The orange wire of the
harness is connected to pin 11 (ORH). The blue wire of the
harness is connected to pin 12 (VREF). The wiring harness
should be routed from the EconoMi$er+ controller to the sen-
sor location.
The outdoor enthalpy changeover curve is set at the
EconoMi$er+ controller. The factory default is curve “A.” See
Fig. 29. See Fig. 30 for Sensor Curve vs. Humidity.
ECONOMI$ER+ CONTROLLER
ACTUATOR
RETURN AIR
TEMP SENSOR
(HIDDEN)
HOOD
GROMMET
CURB
VERTICAL ECONOMI$ER+
(3 TO 12 1/2 TON UNITS)
(SIDE VIEW)
INDOOR AIR
HUMIDITY SENSOR
Fig. 27 — Return Air Temperature Sensor
ECONOMI$ER+
WIRING
GROMMET
OUTDOOR AIR
HUMIDITY
SENSOR
OUTDOOR AIR
TEMPERATURE
SENSOR
RELIEF
BLADE
CONTROLLER
ECONOMI$ER+
Fig. 28 — Outdoor-Air Humidity Sensor
0
1000
2000
3000
4000
5000
6000
2 3 4 5 6 7 8
800 ppm
900 ppm
1000 ppm
1100 ppm
RANGE
CONFIGURA
TION
(ppm)
DAMPER VOLTAGE FOR MAX VENTILATION RATE
CO SENSOR MAX RANGE SETTING 2
Fig. 26 — Indoor Air Quality Voltage Setting