Specifications

DI RECT MOUNT ECONOMIZER SE QUENCE OF OP ER A TION
GEN ERAL
This accessory economizer package is designed to save energy costs by using outdoor air for cooling and ventilation in
place of mechanical cooling whenever possible. The economizer continuously monitors indoor and outdoor air conditions
and compares them to a user-selected setpoint to determine if free cooling is available.
AC CES SO RIES
RXRX-AV02 — Dual Enthalpy Upgrade Kit
For maximum energy savings, this upgrade kit will allow the economizer to compare the outdoor air enthalpy to the return
air enthalpy, instead of a user-selected setpoint to determine if "free cooling" is available.
RXRX-AR02 — Wall-Mounted Carbon Dioxide Sensor
For installations requiring Demand Control Ventilation (DCV) based upon indoor air levels of carbon dioxide (CO
2
). When
the unit supply fan is running, the CO
2
sensor modulates the outside air damper to maintain a user-selected CO
2
level
inside the occupied space. Energy savings are achieved by not bringing in excessive amounts of outdoor air when the
indoor air conditions are suitable. Energy savings can be substantial on buildings with highly variable occupancy rates.
Wall-Mounted Remote Potentiometer
For installations requiring remote adjustment of damper minimum position by the occupants, a remote potentiometer,
such as the Honeywell S963B1128 can be used.
RXRX-BFG03/4C, RXRX-BGF03/4D, RXRX-BGF03/4Y — Power Exhaust Kit
For installations requiring more space static pressure relief than can be obtained with the standard barometric relief
damper included with the economizer, a power exhaust kit can be added.
STARTUP
Attach connector from Economizer Controller to Rooftop Control Panel Connector and install discharge/mixed air
temperature sensor per installation guide.
AD JUST MENTS
5 po ten ti om eters with screw driver
ad just ment slots, start ing from top
of con trol ler
1. EXH Set — Adjustments for (optional) power
exhaust
A. The outside air damper position at which
the power exhaust fan(s) will engage. The
LED labeled EXH below the
potentiometer adjustment will indicate
when power exhaust is available. When
the power exhaust call is made, the
controller provides a 60 ±30 second delay
before exhaust fan activation to allow the
damper to reach the appropriate position.
B. Range of adjustment is from 0-100%
(2-10V); in most applications the power
exhaust is set to engage at about 70%
outside air.
2. Min Pos — Outside Air Damper minimum position
A. Adjust the minimum position
potentiometer to allow the minimum
amount of outdoor air, as required by local
codes, to enter the building.
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