Orion System System Manager TS II In-House - Manual (Page 26)

VCM & VCM-X Controllers
SMTS II 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.
Config
Figure 35: VCM-X Confi guration Screen 1
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 Temperatur

Single Zone VAV

Single Zone VAV w/ CV Heat
Setpoints for Unit 0102 Configuration
Reset Source No Reset
Page 2 of 14
Single Zone VAV
Space Temperature
Return Air Temperature
External Analog Input
Fan VFD Signal Percentage
Outdoor Air Temperature
Single Zone VAV w/CV Heat
Figure 36: VCM-X Confi guration Screen 2
Revised 4/21/15