Bryant 580F Humidity Sensor Current vs. Humidity, N. Power Exhaust, Return Air Humidity Sensor

CURRENT IN mA

20											RH (%)			CURRENT
18														(mA)
												10		5.6
16											20		7.2
											30		8.8
											40		10.4
14											50		12.0
											60		13.6
											70		15.2
											80		16.8
12											90		18.4
10
8
6
4
0	10	20	30	40	50	60	70	80	90	100

HUMIDITY IN % RH

RH — Relative Humidity

Fig. 30 — Humidity Sensor Current vs. Humidity

ECONOMI$ER+

ECONOMI$ER+

CONTROLLER

GROMMET

RETURN AIR

HUMIDITY SENSOR

RETURN DUCT (FIELD-PROVIDED)

An occupied/unoccupied switch can be field-installed in place of the jumper to allow the user to force the control into occu- pied or unoccupied mode of operation for EconoMi$er+ damper position. The occupied/unoccupied switch is required if the user wants to use unoccupied free cooling or different EconoMi$er+ damper vent positions in the unoccupied mode.

N. Power Exhaust

Refer to the Accessory Power Exhaust installation instructions for information on installing the power exhaust accessory.

O. Remote EconoMi$er+ Enable Control

When the control is used with energy management systems that enable and disable the EconoMi$er+, the user can install a field- supplied enable/disable switch. The switch must be wired in series with a 3K ohm, 1 watt or greater resistor. The switch is wired to terminals ORH (pin 11) and VREF (pin 12) on J3. Refer to the Start-Up section for details on how to configure the control.

P. Remote Potentiometer Occupied Minimum Position

The occupied minimum position set point remote potentiom- eter (field-supplied) is used when requiring additional tem-

Fig. 31 — Return Air Humidity Sensor

M. Occupied/Unoccupied Switch

The EconoMi$er+ supports the use of a field-supplied occupied/ unoccupied switch. When the switch is closed it provides a 24-vac signal to the unit for occupied mode and when open, there is no signal to indicate unoccupied mode. The control can be configured to allow different minimum economizer damper positions and to control how mechanical cooling will and will not be used in the occupied mode.

NOTE: The remote potentiometer (see below) will override the occupied minimum position if the potentiometer setting is greater than the occupied minimum position.

For 3 to 121/2 ton units, a wire from J1-OCC (pin 4) and a wire from J1-24V (pin 5) are wire-nutted together to jumper the terminals.

porary ventilation. The remote potentiometer (10K ohm - closed damper, 100K ohm - open damper) will only control the occupied minimum position.

The accessory 5-in wiring plug, CRE+PLUG001A00 is required to connect the potentiometer.

The plug is installed on pins 15, 16 and 17 on J3 of the EconoMi$er+ controller. The pins are labeled with the ground symbol, MIN and VREF on the EconoMi$er+ controller. See Fig. 22. The pink wire from the harness is connected to pin 15 (ground symbol). The gray wire from the harness is con- nected to pin 16 (MIN). The yellow wire from the harness is connected to pin 16 (VREF). The wiring harness should be extended with wires and wire nuts and routed from the EconoMi$er+ controller to the remote potentiometer location.

NOTE: Pins 13 (ground symbol) and 14 (IAQ), which are wired to the accessory 5-pin plug, are not used for the remote potentiometer installation. They are used for an accessory IAQ sensor (if required).

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