Outdoor Air Humidity Sensor | Bryant 580F guide

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.

CO2 SENSOR MAX RANGE SETTING

	6000
(ppm)	5000
(ppm)
CONFIGURATION	4000						800 ppm
							800 ppm
	3000						900 ppm
	3000						1000 ppm
							1000 ppm
	2000						1100 ppm
	2000

RANGE	1000
RANGE
	0
	2	3	4	5	6	7	8
	DAMPER VOLTAGE FOR MAX VENTILATION RATE

Fig. 26 — Indoor Air Quality Voltage Setting

ECONOMI$ER+ CONTROLLER

HOOD

ACTUATOR

RETURN AIR

TEMP SENSOR

(HIDDEN)

GROMMET

CURB

INDOOR AIR

HUMIDITY SENSOR

VERTICAL ECONOMI$ER+

(3 TO 12 1/2 TON UNITS)

(SIDE VIEW)

Fig. 27 — Return Air Temperature Sensor

ECONOMI$ER+

CONTROLLER

	WIRING
	GROMMET
	OUTDOOR AIR
	HUMIDITY	RELIEF
	SENSOR	RELIEF
	SENSOR	BLADE
		BLADE
	OUTDOOR AIR
	TEMPERATURE
	SENSOR

Fig. 28 — Outdoor-Air Humidity Sensor

—19—

580F specifications

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Bryant 580F Outdoor Air Humidity Sensor, Indoor Air Quality Voltage Setting

Models: 580F