Valent_IOM_Controls - RJI-Sales.com

Air Flow Measuring Station (Universal Input 11)
Measured by the either the Inlet cone sensor or AMD
damper located in the outside air inlet. This is the
actual air flow being measured in CFM as calculated
by the factory calibrated air flow measuring station.
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Primary Static Pressure Input (Universal Input 12)
Displays the interpreted value of the voltage read
from the space or duct static pressure sensor. The
static pressure sensor should be field installed in the
space/duct served by the rooftop unit. The output
signal from the sensor must be 0-10 VDC. The space
/ duct static pressure sensor, when used, must be
connected to Universal Input 12 on the 34 point
module depending on the configuration of the
ventilator. For the sensor voltage to be interpreted
correctly, the conversion scale and offset values must
be set up correctly for that device (refer to the
Appendix).
Filter Status Input (Universal Input 13)
The filter status differential pressure switch
(optional) indicates the pressure across the filters. If
the contacts close for five continuous minutes on the
pressure switch, the controller interprets a dirty filter
condition. The unit operates normally, but the alarm
LED is illuminated on the controller.
Space Setpoint Adjustment (Universal Input 14)
Represents the amount of offset currently being
applied to the space temperature setpoint. A positive
value will increase the space temperature setpoint by
the amount shown. A negative value will decrease the
space temperature setpoint by the amount shown.
Occupancy Input (Universal Input 15)
The hardwired occupancy input of the controller can
be used to determine the occupancy mode. When the
input contacts are closed, the mode of the controller
is occupied. When the contacts are open, the mode is
unoccupied. The factory-installed jumper wire should
be removed when a field-installed occupancy device
is used. If the hardwired input is used to determine
the occupancy of the controller, the OCC
HARDWIRED field (operator interface or PC tool)
should be set to TRUE. When the hardwired input is
not being used to determine the occupancy, the OCC
HARDWIRED field should be set to False
Shutdown Input (Universal Input 16)
The shutdown input of the controller prevents unit
operation when the input contacts are open. The
factory-installed jumper wire should be removed
when a field-installed shutdown device is used.
16 Point Module
Secondary Static Pressure Input (Universal Input 1)
When the unit is equipped with both a space and duct
static pressure sensor, universal input 1 of the 16
point module will always be used for the duct static
pressure sensor input. For the sensor voltage to be
interpreted correctly, the conversion scale and offset
values must be set up correctly for that device (refer
to the Appendix).
Exhaust Temperature (Universal Input 2)
Measured with a thermistor (type III) factory
installed at the exhaust side of the heat wheel. The
sensor is wired to Universal Input 2 on the expansion
module of the controller.
Pressure Sensor Circuit A (Universal Input 3)
Measured with a pressure transducer factory installed
in the refrigeration piping. The signal from the sensor
will be a 0-10 VDC signal with a range of 0-750 psi.
The sensor is wired to Universal Input 3 on the
expansion module of the controller.
Exhaust Fan Status (Universal Input 4)
Reflects the status of the differential pressure switch
for the exhaust fan (Universal Input 4, expansion 16
point module). When the input contacts are closed,
the exhaust fan status is true. When the input contacts
are open, the exhaust fan status is false.
CO2 Sensor (Universal Input 5)
Measured by the field installed CO2 sensor located in
the space/room served by the rooftop unit. That
sensor provides a 0-10 VDC signal to the controller,
Universal Input 5, of the expansion module that
corresponds to the space CO2: 0 VDC = 500 ppm
CO2, 10 VDC = 1500 ppm CO2.
Fan / Damper Remote Command (Universal Input 6)
Displays the fan speed command coming from the
remote fan input, universal input 6 on the expansion
16 point module. 0vdc will equal the units minimum
supply fan speed, and 10 vdc equals the units
maximum supply fan speed.
Low Limit (Universal Input 7)
Displays the status of the low limit sensor, when
applicable (factory supplied with hot water coils).
The ventilator will go into a low limit alarm, shutting
down the fans, closing the outside air damper, and
forcing the hot water valve open, any time the input
is closed. Once triggered the low limit will be
enabled for five minutes and then automatically reset.
After three strikes the controller must be reset. Input
open=normal, input closed=alarm.
Controls V2 IOM 8 May 2011
Part Number 474626