Greenheck Fan Energy Recovery Ventilator APEX-200 - Manual (Page 12)

12 ®
Rotation Sensor
Dirty Filter Sensor
Service Outlet
Temperature Control Package
Optional Accessories
Vapor Tight Lights
The rotation sensor monitors energy recovery wheel rotation. If the wheel should stop rotating, the sensor will
close a set of contacts in the unit control center. Field wiring of a light (or other alarm) to these contacts will
notify maintenance personnel when a failure has occurred.
Dirty filter sensors monitor pressure drop across the outdoor air filters, exhaust air filters, or both. If the
pressure drop across the filters exceeds the set point (set at factory), the sensor will close a set of contacts in
the unit control center. Field wiring of a light (or other alarm) to these contacts will notify maintenance
personnel when filters need to be replaced.
Temperature control package allows for stand-alone operation
of energy recovery units provided with supplemental cooling
and heating. Controller can be ordered for discharge or room
control. Room control would require a room thermostat (or
other call for heat) be wired to the controller. A remote panel
option is also available to allow set points and other controller
parameters to be adjusted from a remote location. For
additional information, refer to the following documents:
Catalog: Temperature Control Package
IOM: Temperature Control Package, Part #461468
120 VAC GFCI service outlet ships loose for field installation.
Requires separate power source so power is available when unit
main disconnect is turned off for servicing.
Vapor tight lights provide light to each of the
compartments in the energy recovery unit. The
lights are wired to a switch mounted on the
outside of the unit. The switch requires a separate
power source to allow for power to the lights
when the unit main disconnect is off for servicing.
CO2 Sensor
This accessory is often used to provide a modulating control signal to a variable frequency drive to raise and
lower airflow in relationship to the CO2 levels in the space. This strategy is often referred to as Demand Control
Ventilation and provides further energy savings to the system.