Valent Controls IOM 42 IOM-C1-0616
Part Number 474626
CO2 Enabled
Indicates whether or not CO2 control is actively
modulating the damper.
CO
2
Level
The space CO
2
reading is measured by the field-
installed CO
2
sensor located in the space. The
sensor provides a 0-10 VDC signal to the
controller, which is wired to U5 on the DDC2 I/O
module. 0 VDC = 0 ppm CO
2
, 10 VDC = 2000
ppm CO
2
.
CO
2
Setpoint
The setpoint of CO
2
, in ppm, that the unit will
maintain by modulating the outdoor air damper.
Compressor 1 Ambient Lockout Setpoint
Compressor 1 will not be allowed to run if the
outdoor temperature is below this setpoint. This
setpoint is only used if individual compressor
lockouts are enabled.
Compressor 1 Output
Indicates whether compressor 1 is on or off. This
is Digital Output 2 on the DDC1 I/O module.
Compressor 2 Ambient Lockout Setpoint
Compressor 2 will not be allowed to run if the
outdoor temperature is below this setpoint. This
setpoint is only used if individual compressor
lockouts are enabled.
Compressor 2 Output
Indicates whether compressor 2 is on or off. This
is Digital Output 3 on the DDC1 I/O module.
Compressor 3 Ambient Lockout Setpoint
Compressor 3 will not be allowed to run if the
outdoor temperature is below this setpoint. This
setpoint is only used if individual compressor
lockouts are enabled.
Compressor 3 Output
Indicates whether compressor 3 is on or off. This
is Digital Output 4 on the DDC1 I/O module.
Compressor 4 Ambient Lockout Setpoint
Compressor 4 will not be allowed to run if the
outdoor temperature is below this setpoint. This
setpoint is only used if individual compressor
lockouts are enabled.
Compressor 4 Output
Indicates whether compressor 4 is on or off. This
is Digital Output 5 on the DDC1 I/O module.
Cooling Execution Time
Do not adjust unless given specific direction
from the factory.
Cooling Integral Constant
Do not adjust unless given specific direction
from the factory.
Cooling Proportional Constant
Do not adjust unless given specific direction
from the factory.
Damper Configuration
Indicates the type of damper configuration
installed on the system.
Damper Output
Indicates the position of the modulating outdoor
air damper, where 100% = fully open. Analog
output 1 on the DDC1 I/O module is used to
control the modulating dampers. For units with
no return damper, the outdoor air damper is
controlled open to 15% before the supply fan is
allowed to start. When the damper end-switch
closes, the supply fan is enabled. The units
return air damper, if equipped, modulates
inversely to the outdoor air damper (100%
outdoor airflow = 0% return air flow).
Damper Remote Control
If “True”, indicates that the damper is being
controlled by either a remote 0-10V signal or by
the building automation system.
Defrost Mode
Indicates whether the energy recovery defrost
mode is active. When active:
Units equipped with a flat plate heat exchanger
will modulate the face/bypass damper to bypass
more outdoor air in order to keep the Exhaust
temperature at or above the Flat Plate Defrost
Setpoint.
A unit equipped with a Heat Wheel controlled by
a variable frequency drive will slow the wheel in
order to keep the Exhaust Temperature at or
above the Heat Wheel Defrost Setpoint.
Units equipped with a start-stop type Heat
Wheel will periodically disable the heat wheel
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