Valent Controls IOM 43 IOM-C1-0616
Part Number 474626
motor in order to raise the unit Exhaust
Temperature.
Dehumidification Priority
Sets whether a unit in Dehumidification mode
should choose to maintain Space Temperature
or Space Humidity should the space become
over-cooled. When set to Temperature Priority: if
the space temperature falls 4 degrees (Def)
below the Space Temperature Setpoint, the unit
will exit Dehumidification mode until the space
Temperature rises to Setpoint. If set to Humidity
Priority, the unit will continue to dehumidify
regardless of the Space Temperature.
Dehumidification Status
Indicates whether dehumidification is currently
active.
Digital/Chilled Water Output
If the unit is configured with a Digital Scroll™
Compressor, this reflects the percentage of
output being sent to the digital scroll
compressor. If the unit is configured with a
Chilled Water coil, this reflects the percentage
open (if setup as direct acting) or the percentage
closed (if setup as reverse acting) of the water
valve. The control signal is output from AO6 of
the DDC1 I/O module.
Duct Pressure
Displays the duct static pressure reading, in
InWc, from the hardwired sensor wired to U12 of
the DDC1 I/O module. The sensor outputs 0-
10VDC which equates to 0-5 InWc. When
installing the duct static pressure sensor, you
should run the sensor no less than 2/3 down
duct.
Duct Pressure High Limit Setpoint
If the static pressure rises above this setpoint
(default 2.50 InWc) for 15 seconds, the unit will
shut down and an alarm will be displayed.
Duct Pressure Setpoint
The duct static pressure that the system should
maintain, in InWc. As the duct static pressure
drops below this setpoint the supply fan speed
will increase to raise the duct static pressure.
When the duct static pressure rises above this
setpoint the supply fan speed will decrease to
reduce the duct static pressure.
DX Coil Leaving Temperature
The leaving air temperature of the DX coil as
measured using a 10K Type-III thermistor
downstream of the coil. The sensor is wired to
U2 of the DDC1 I/O module.
DX Coil Low Limit Safety
Sets the DX Coil Leaving Temperature at which
the unit will automatically reduce cooling
capacity to prevent freezing. Must be set 4°F
above the DX Coil Low Limit Setpoint.
DX Coil Low Limit Setpoint
Sets the DX Coil Leaving Air temperature at
which the unit will disable mechanical cooling to
protect the DX coil. Mechanical cooling is
allowed once more at DX Coil Low Limit
Setpoint +4. Also see DX Coil Low Limit Safety.
DX Coil Setpoint
The requested temperature of the DX coil during
dehumidification mode.
Economizer Configuration
Indicates the type of economizing the system is
running: outdoor enthalpy, comparative
enthalpy, or outdoor temperature.
Economizer Enable Setpoint Enthalpy
The enthalpy value at which the system will start
economizing.
Economizer Enable Setpoint Temperature
The ambient temperature at which the system
will start economizing.
Electric Heat Output
The percentage of output of electric heating. The
electric heater control module is wired to AO5 on
the 34-input module.
Enable Compressor 1 Ambient Lockout
If enabled, compressor 1 will not be allowed to
run below the Outdoor Air Temperature set by
Compressor 1 Ambient Lockout.
Enable Compressor 2 Ambient Lockout
If enabled, compressor 2 will not be allowed to
run below the Outdoor Air Temperature set by
Compressor 2 Ambient Lockout.
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