Orion System OE392-10 System Manager TS - Manual (Page 37)

SMTS Technical Guide
VCM, VCM-X & VCB-X Controllers
37
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.
Dehumidifi cation Control
Touch the radio button to select the type of Dehumidifi cation control.
Default is None.

None
—The unit does not have a Dehumidifi cation Mode.
 
Dehumidify in Occupied Vent Mode Only —The unit
can only enter Dehumidifi cation during the Occupied Vent
Mode (when there is no call for Cooling or Heating).

Dehumidify in Vent Mode Anytime —The unit can only
enter Dehumidifi cation during the Vent Mode (when there
is no call for Cooling or Heating) in both the Occupied and
Unoccupied operation.
 
Dehumidifi cation in All Modes Occupied —This is
Occupied Mode Dehumidifi cation Priority. The unit can
enter Dehumidifi cation during Cooling, Heating, or Vent
Modes, but only while in Occupied operation.
VCB-X Confi guration

Dehumidifi cation in All Modes Anytime — This is
Occupied and Unoccupied Dehumidifi cation Priority. The
unit can enter Dehumidifi cation during Cooling, Heating, or
Vent Modes while in Occupied or Unoccupied operation.
For units controlled by space humidity sensors, Dehumidifi cation is
initiated based on an Indoor Humidity Setpoint. For 100% OA units
(MUA), Occupied Dehumidifi cation is initiated based on an Outdoor Air
Dewpoint Setpoint. For MUA units, Unoccupied Dehumidifi cation can
only occur if the unit is confi gured for Night Setback recirculating opera-
tion and has a Space Humidity sensor and a Space Humidity Setpoint.
Reheat Type
This confi guration option is available if expansion module EM1 has been
installed and confi gured and if Dehumidifi cation has been confi gured.
If you need Reheat in the Dehumidifi cation mode, this screen allows
you to confi gure what kind of reheat will be used. The output(s) will be
staged or modulated to maintain the Active Supply Air Setpoint. Touch
the radio button to select the desired Reheat Type. Default is None.

None— No Reheat.
 
On/Off HGR Relay—
Single On/Off Reheat stage (Reheat
Relay).
 
Modulating HGR —Modulating Hot Gas Reheat
(MHGR)
 
Use Unit Heat for Reheat—
Using the unit’s heat as
Reheat when Hot Gas Reheat is not available.
 
Mod HGR AND Unit Heat —Using MHGR as the 1 st
form of Reheat, supplemented by unit Heat if necessary.
 
On/Off HGR AND Unit Heat —Using “Reheat Relay”
stage as the 1 st form of Reheat, supplemented by unit Heat
if necessary.
NOTE: This screen will be grayed-out if not using Dehumidifi cation.
Reversing Valve ( Heat Pump Confi guration)
If you are using a Heat Pump, touch the radio button to select the desired
Reversing Valve Signal if your Heat Pump unit activates its reversing
valve during Cooling or Heating operation. Default is None.

None— Not a Heat Pump and no externally controlled
reversing valve.
 
Air to Air Heat Pump Fail to Heating—
Air to Air Heat
Pump and Reversing Valve fails to Heating.
 
Air to Air Heat Pump Fail to Cooling— Air to Air Heat
Pump and Reversing Valve fails to Cooling.
 
Water Source Heat Pump Fail to Heating— Water
Source Heat Pump and Reversing Valve fails to Heating.
 
Water Source Heat Pump Fail to Cooling—
Water
Source Heat Pump and Reversing Valve fails to Cooling.