L. Indoor Air Humidity Sensor
For differential enthalpy sensing, the EconoMi$er+ control- ler uses the standard outdoor air temperature sensor, the outdoor air humidity sensor, and the optional indoor air humidity sensor, an optional return air temperature sensor (RAT). The
ECONOMI$ER+
ECONOMI$ER+
CONTROLLER
GROMMET
RETURN AIR
HUMIDITY SENSOR
RETURN DUCT
Mount the
The outdoor enthalpy changeover curve is set with at the EconoMi$er+ controller. The selectable curves are A, B, C, and D. The factory default is curve “A.” See Fig. 29. See Fig. 30 for Sensor Curve vs. Humidity.
M. Occupied/Unoccupied Switch
The EconoMi$er+ supports the use of a
NOTE: The remote potentiometer (see below) will override the occupied minimum position if the potentiometer setting is greater than the occupied minimum position.
A wire from
An occupied/unoccupied switch can be
N. Power Exhaust
Refer to the Accessory Power Exhaust installation instruc- tions for information on installing the power exhaust accessory.
O. Remote EconoMi$er+ Enable Control
When the control is used with energy management systems that enable and disable the EconoMi$er+, the user can install a
P. Remote Potentiometer Occupied Minimum Position
The occupied minimum position set point remote potentiom- eter
Fig. 31 — Return Air Humidity Sensor
The accessory
The plug is installed on pins 15, 16 and 17 on J3 of the EconoMi$er+ controller. The pins are labeled with the ground symbol, MIN and VREF on the EconoMi$er+ control- ler. See Fig. 22. The pink wire from the harness is connected to pin 15 (ground symbol). The gray wire from the harness is connected to pin 16 (MIN). The yellow wire from the harness is connected to pin 16 (VREF). The wiring harness should be extended with wires and wire nuts and routed from the EconoMi$er+ controller to the remote potentiometer location.
NOTE: Pins 13 (ground symbol) and 14 (IAQ), which are wired to the accessory
The unoccupied minimum position can only be set at the controller. The occupied minimum position set point config- ured at the EconoMi$er+ controller should be set to 0 when using a remote potentiometer. The occupied minimum posi- tion will also be used as part of the IAQ routing; it will be the maximum position the damper moves to when there is an IAQ call.
If the remote potentiometer (occupied) position is greater than the EconoMi$er+ controller unoccupied minimum posi- tion, then the remote potentiometer setting will be used. The remote potentiometer is field supplied and must be a
Q. Demand Ventilation Control
Demand ventilation control uses an IAQ sensor (CRE+PLUG001A00 required) to control the amount of out- side air admitted into the system. Normally, the minimum position of the EconoMi$er+ damper is established based on the demand occupancy of the space. The IAQ sensor will be used to modulate the EconoMi$er+ minimum damper position below the normal minimum position based on full occupancy. The lower limit is called the base ventilation rate. See Fig. 32.
If there is no IAQ signal the damper will be in the unoccu- pied minimum position (configuration item number 3). If there is an IAQ signal the damper will be in the occupied