Orion System VCM-X/RNE Controller - Manual (Page 36)

RNE CONFIGURATION
VCM-X / RNE Operator Interface SD 36
RNE Confi guration Screens
Confi guration Screen #3 - HVAC Mode Enable
RNE Cnfg ID 101
HVAC Mode Enable
Supply Air
Use < Or > To Change
Select the Temperature Sensor that will determine the Heating, Cooling,
or Vent Mode of operation. The selections are:
 
Supply Air
This is typical for VAV applications. Occupied Cooling
with Morning Warm-up.

Outdoor Air
This is for 100% Outdoor Air (MUA) units.
Dehumidifi cation utilizes a Dewpoint Calculation if
equipped with an Outdoor Air Humidity Sensor.

Space Temperature
This is for any unit that conditions a space and is not 100%
Outdoor air. Occupied/Unoccupied Heating, Cooling, and
Vent Modes of operation.

Return Air
This selection can be used when an Average Building
Temperature (the Return Air Temperature) needs to
determine Heating, Cooling, and Vent Modes of operation.

Supply Air/Tempering
This selection is for VAV “cooling only” applications where
because of cold outdoor temperatures, even at minimum
damper position, you may need to enable heat to maintain
the cooling near its Cooling Supply Air Setpoint. When
heat is enabled during this sequence, it will control to
a non-adjustable setpoint that is 2ºF less than the Cooling
Supply Air Setpoint. Includes a Morning Warm-up
sequence.
Confi guration Screen #4 - HVAC Reset Source
RNE Cnfg ID 101
HVAC Reset Source
No Reset
Use < Or > To Change
The Supply Air Heating and Cooling Temperature Setpoints can be reset
using various input sources. Default is No Reset. Select the desired
Reset Source for Supply Air Temperature Reset. The Single Zone VAV
option should be selected in applications where the Supply Fan VFD
speed is reset based on the Space Temperature. If you select No Reset,
then neither the Supply Air Setpoint nor the Supply Fan VFD Reset will
occur. The selections are:

No Reset

Fan VFD Percentage

Sp ace Sensor

Outdoor Sensor

Return Air Sensor

Single Zone (SZ) VAV

Remote Reset Signal

SZ VAV with CV Heating
Confi guration Screen #5 - Reset Interval Rate
RNE Cnfg ID 101
Reset Interval
Rate...: 20 s
[1-255 Seconds]
If you selected Space or Return Air Temperature Reset in Screen #4,
enter a value in seconds between 1-255. This value determines how fast
the Supply Air Temperature Setpoint is adjusted as the Reset Source
changes. Default is 20 seconds.
Confi guration Screen #6 - Dehumidifi cation
Control
RNE Cnfg ID 101
Dehumidification
Control: NO
Use < Or > To Change
Select YES if your system requires Dehumidifi cation Control. Default
is NO.
Confi guration Screen #7 - Dehumidifi cation
Priority
RNE Cnfg ID 101
Dehumidification
Priority: NO
Use < Or > To Change
Select YES if Dehumidifi cation is a Priority during the Occupied Mode.
Priority means that the Cooling stages will activate based on Coil Tem-
perature and Reheat will be used regardless of Heating, Cooling, or Vent
Modes of Operation. Default is NO.
Confi guration Screen #8 - Dehumidifi cation
Unoccupied
RNE Cnfg ID 101
Dehumidification
Unoccupied: NO
Use < Or > To Change
Select YES if Dehumidifi cation is required during the Unoccupied
mode. Unoccupied Dehumidifi cation is activated based on Indoor Air
Humidity only. Default is NO.