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Modulating OA Damper
100 % Outside Air
Unit Status Overview
CO
r
o
amp
uTpuT
2
The CO
Ramp Output screen will be active if the unit is configured for CO
2
control. This screen displays the CO
status of the control ramp.
e
r
s
nergy
ecovery
TaTus
This screen provides overall status of the energy recovery device. The device
installed, heat wheel, face damper, or bypass damper will appear with the speed
or position of the device.
d
r
o
eFrosT
amp
uTpuT
This screen only appears if the unit has energy recovery and a frost control
method was provided on the unit.
If the energy recovery device is a polymer wheel, the state of the wheel high
differential pressure switch will be displayed.
Upon sensing a high differential pressure across the energy wheel, the unit will
go into defrost if the outside air temperature is below the defrost temperature
setpoint.
p
s
reheaT
TaTus
This screen displays the position of the Outside Air Damper and whether the
preheater is active or inactive. When the outside air damper is modulating, the
damper setpoint for the preheater is also displayed.
c
r
1
ooling
amp
This screen displays the active setpoint, supply discharge temperature, cooling
enable/disable, cooling ramp being sent from the controller, and the overall
capacity being demanded.
h
p
h
r
eaT
ump
eaTing
amp
The Heat Pump Heating Ramp status screen is active when the unit is configured
as a heat pump. The screen displays the active setpoint, supply temperature,
status of the heat pump heating control ramp, the current ramp percentage, and
the current capacity of the operating compressors.
c
r
ompressor
equesT
The compressor request screen will be active if the unit is equipped with DX
cooling. This screen displays overall status of individual compressor operation
being sent from the unit controller. Example: Circuit A compressor enable (On)
with modulating value of 26%.
setpoint, CO
level from the space, and the
2
2
Microprocessor Controller for DOAS
2
15
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