Orion System OE392-10 System Manager TS - Manual (Page 26)

VCM & VCM-X Controllers
SMTS Technical Guide 26
VCM & VCM-X Confi guration
VCM-X Confi guration
Touch the
< Confi guration>
button to access the
Confi guration Setpoints Screens.
For screens that contain radio buttons, touch the radio but-
ton next to your selection. For screens with square buttons, touch one or
more square buttons to make your confi guration selections for the unit.
HVAC Mode Enable Source
Touch the radio button to select the Temperature Sensor that will deter-
mine the Heating, Cooling, or Vent Mode of operation. The available
selections are as follows:
 
Supply Air Temperature
—This is typical for VAV
applications. Occupied Cooling with Morning Warm-up.

Outdoor Air Temperature —This is for 100% Outdoor
Air (MUA) units. Dehumidifi cation utilizing 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/Unoccu-
pied Heating, Cooling, and Vent Modes of operation.

Return Air Temperature
—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 w/ 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.
HVAC Reset Source
The Supply Air Heating and Cooling Temperature Setpoints can be reset
using various input sources. Default is No Reset. Touch the radio button
to 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 Supply Fan
VFD Reset will occur. The available selections are as follows:
 
No Reset
 
Space Temperature

Return Air Temperature

External Analog Input

Fan VFD Signal Percentage

Outdoor Air Temperature

Single Zone VAV
Config
Heat Pump Control
Select this item if the HVAC unit is a Heat Pump.
Reversing Valve Used for Cooling
Select this item if your Heat Pump unit activates its reversing valve dur-
ing the Cooling operation. Do not select this item if your Heat Pump unit
activates its reversing valve during the Heating operation.
Fan Proving Switch Installed
Select this item if your HVAC unit has a fan proving switch installed.
Fan Cycles with Heating & Cooling
Select this item if you want the HVAC unit’s Supply Fan to only run
during Heating, Cooling, or Dehumidifi cation Modes. DO NOT select
this item if you want the HVAC unit’s Supply Fan to run continuously
while in the Occupied Mode, regardless of the Heating, Cooling, or
Dehumidifi cation Modes.
Has Static Pressure Control
Select this item if the HVAC unit has a Supply Fan that delivers a Variable
Volume of Air using a VFD or a Bypass Damper to maintain Duct Static
Pressure. DO NOT select this item if the HVAC unit has a Supply Fan
that delivers a Constant Volume of air. If you have a VFD on a constant
volume unit, select this option for Filter Loading Control.
Controls Economizer
Select this item if the VCM-X is controlling the economizer.
Outdoor RH Sensor Installed
Select this item if the HVAC unit is equipped with an Outdoor Air Hu-
midity Sensor.
Indoor RH Sensor Installed
Select this item if the HVAC unit is equipped with an Indoor Air Humid-
ity Sensor
Has Humidity Control
Select this item if your system has Dehumidifi cation control.
Has Night Humidity Control
Select this item if your system has Dehumidifi cation control during
unoccupied hours. Unoccupied Dehumidifi cation is activated based on
Indoor Air Humidity only.
Humidity Control Has Priority
Select this item if Dehumidifi cation is a priority during the Occupied
Mode. Priority means that the Cooling stages will activate based on the
Coil temperature, and Reheat will be used regardless of Heating, Cooling
or Vent Modes of operation.