Valent_IOM_Controls - RJI-Sales.com

Setpoint Descriptors
System
Current Alarm
Displays the current alarm state of the unit.
View Only
Reset
This point allows the user to reset all of the units
alarms and reboots the units controller. To reset the
controller down arrow to the reset option, hit the
enter button once, down arrow once to reset allow 5
min, press enter again:
Normal (default)
Reset allow 5 min.
Editable
Occupancy
Displays Occupied during the day (occupied hours),
Unoccupied and night (unoccupied hours), and
Standby (when unit is running in standby. The
occupancy of the controller is determined by:
• Hardwired occupancy input
• Local time clock/schedule
• Communicated command from building
automation system
When a hardwired occupancy input is used, remove
the occupancy input jumper wire on Universal Input
15. Connect the occupancy device to that input. The
setup parameter for Occupancy Hardwired must be
set to True.
To use the units standby feature the Occupancy
Hardwired must be left at false, occupied and
unoccupied will be set via the units stand alone
controller. When the stand alone schedule is occupied
and the universal input 15 is open the unit will run in
standby mode. When the stand alone schedule is
occupied and the universal input 15 is closed the unit
will run in occupied mode. When the stand alone
schedule is unoccupied and the universal input 15 is
either open or closed the unit will be in unoccupied
mode.
The occupancy can also be determined by the local
time clock/schedule in the controller. When the local
clock/schedule is used, set Occupancy Hardwired to
False. Ensure that the time and date are set correctly
in the controller.
Finally, a communicated command from a building
automation system (BAS) can be used to determine
the occupancy of the controller. When a
communicated command is to be used, set
Occupancy Hardwired to False. Communication is
possible via several communication protocols
including LonTalk, BACnet IP, and BACnet MS/TP.
View Only
Sup Fan Start Stop
True when:
Run Stop Input (hardwired) is AllowToRun and
System enable is True and
All fan alarms are False and
Duct static pressure high limit is False (duct static
VAV units) and
Occupancy is True (occupied) or
Night operation is True (night heating, cooling, or
dehumidification)
View Only
Range: True, False
Supply Fan Speed
Displays the defined speed for the supply fan. The
rooftop unit includes a variable frequency drive
(VFD) for the supply fan motor. In constant volume
operation, the speed of the fan remains constant at the
defined speed (50-100%, adjustable). At 100%, the
fan speed is determined according to the setup of the
VFD (the design frequency, in Hz). The speed of the
supply fan may be slowed for constant volume
operation by adjusting the supply fan speed in the
controller (50-110%). The minimum speed must not
be less than 50% of the design flow to ensure proper
heating and cooling operation.
For variable air volume (VAV) applications, the
speed of the fan is automatically determined by the
controller (50-100%).
Editable
Range: 50-100%
Default: 100%
Sup Fan Status
Reflects the status of the differential pressure switch
for the supply fan (Universal Input 8). When the
input contacts are closed, the supply fan status is
True. When the input contacts are open, the supply
fan status is False.
View Only
Range: True, False
System Enable
Must be True for normal unit operation. When
system enable is False, the unit is completely
disabled and will not operate.
Editable
Range: True, False
Default: True
Controls V2 IOM 18 May 2011
Part Number 474626