Orion System System Manager TS II In-House - Manual (Page 44)

Zone
Zone
VCM, VCM-X & VCB-X Controllers
SMTS II Technical Guide 44
VCB-X Controllers
SAT Reset Source
This confi guration option is not available if Single Zone VAV was
selected as the HVAC source. The Supply Air Setpoint can be “auto-
matically” adjusted based on a selected reset source. This screen allows
you to choose this source. Select No Reset for Single Zone VAV units.
Default is No Reset. The available selections are as follows:
 
No Reset
— No SAT Setpoint Reset will occur. The SAT
Setpoints remain fi xed.
 
Space Temperature —The SAT Setpoints will be
adjusted based on the Space Temperature.
 
Outdoor Air —The SAT Setpoints will be adjusted based
on the Outdoor Air Temperature.
 
Return Air
—The SAT Setpoints will be adjusted based on
the Return Air Temperature.
 
Fan VFD Signal —The SAT Setpoints will be adjusted
based on the VFD Signal. This is good for Adjusting the
Setpoints based on the building’s load by looking at the
VFD speed.
NOTE:
This screen will be grayed-out if Single Zone VAV was selected
as the HVAC Mode Enable Source.
 Fan Cycle Mode— Touch the square button to select this item if
you want the HVAC unit’s Supply Fan to only run during
Heating or Cooling Mode. 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 or Cooling Mode.
 Has Head Pressure Control— Touch the square button to
select this item if you have the EM1 Module installed and
confi gured and if a Head Pressure Sensor is installed for Head
Pressure
Control.
 Has Water Side Condenser—
Touch the square button to
select this item if you have the EM1 Module installed and
confi gured and if using a Water Side Condenser.
VCB-X Confi guration

Outdoor Air Temperature
—This is for a 100% Outdoor
Air Unit (MUA) using the Outdoor Air Temperature Sensor to
determine the Heating, Cooling, and Vent Modes of operation.
Dehumidifi cation utilizes an Outdoor Air Dewpoint Setpoint

Supply Air Cooling Only
—This is for a standard
Cooling Only VAV unit with optional Morning Warm Up.
In the Occupied Mode, the unit will be in the Cooling
Mode controlling to the Cooling Supply Air Setpoint.

Return Air Temperature —Optional recirculating unit
confi guration using the Return Temperature Sensor to
determine the Heating, Cooling, and Vent Modes of
operation.

Space Temp w/ High OA Content —If it is preferable
to use Space conditions (instead of Outside Air) to control
a 100% or high percentage outdoor air unit, this option
allows tempering of the outdoor air in the Space Vent
Mode of operation to prevent dumping of hot or cold air
into the space.
Setpoints for Unit 0001 Configuration
Static Pressure Control
None
Page 4 of 19
Fan VFD or Single Zone VAV
Bypass Damper
Figure 76: VCB-X Relay Confi guration Screen 4
Setpoints for Unit 0001 Configuration
SAT Reset Source
Page 5 of 19
No Reset
Space Temperature
Outdoor Air
Return Air
Fan VFD Signal
Figure 77: VCB-X Relay Confi guration Screen 5
Setpoints for Unit 0001 Configuration
Use Fan Cycle Mode
Has Head Pressure Control
Has Water Side Condenser
Page 6 of 19
Figure 78: VCB-X Relay Confi guration Screen 6
Static Pressure Control
This confi guration option is available if expansion module EM1 is
installed and confi gured. Default is Fan VFD. The options are:

None —This unit is not controlling Duct Static Pressure.

Fan VFD or Single Zone VAV
—This unit has a Supply
Fan VFD that modulates to control the Duct Static Pressure.

Bypass Damper —This unit uses a Bypass Damper to
control the Duct Static Pressure.