Orion System System Manager TS II In-House - Manual (Page 54)

Zone
Zone
VCM, VCM-X & VCB-X Controllers
SMTS II Technical Guide 54
VCB-X Controllers
Static Setpoints
Touch the
< Static>
button to access the Static Setpoint
Screens.
Heating Maximum Fan VFD Speed
If this unit is confi gured for Single Zone VAV operation, and you have a
Modulating Heat source that will allow VAV heating, then the Heat Mode
Minimum Fan VFD Signal will be the fan speed at which the VFD will
start operating at when heating is initiated. It can then modulate up to the
Heating Maximum Fan VFD Signal Setpoint as the Space Temperature
falls within the range created by the High Space Setpoint and the Low
Space Setpoint. If this is a CAV unit or a Single Zone VAV unit that will
have CAV Heating, these minimum and maximum setpoints should both
be set at the same value which represents the constant speed you want
the fan to operate at during the Heating Mode. High limit = 100%; Low
limit = 30%; Default = 100%.
Vent Mode Minimum Fan VFD Signal
The Vent Mode Minimum Fan VFD Signal is the speed at which the fan
will operate at during the Vent Mode in a unit confi gured for Single Zone
VAV operation. High limit = 100%; Low limit = 0%; Default = 20%.
Economizer Minimum Position
The Economizer (OA Damper) Minimum Position Setpoint is maintained
during the Occupied Mode even if the Economizer is disabled due to
the OA Temperature being above the Economizer Enable Setpoint. High
limit = 100%; Low limit = 0%; Default = 10%.
Economizer Max Pos in High CO2
This Setpoint allows you to set the Maximum Position the Economizer
will open if high CO
2
conditions occur in the space. The Maximum
Economizer Position Setpoint is used to limit the amount of Outdoor
Air that will be introduced to the HVAC unit in order to ensure the unit
is operating within its Heating and Cooling design limitations. The
Minimum setting for this Setpoint is the value previously set for the
Economizer Min Position Setpoint. High limit = 100%; Low limit =
0%; Default = 50%.
Economizer Max Pos in Heating Mode
This Setpoint allows you to set the Maximum Position the Outdoor Air
Damper will open to while Heating is operating. This takes priority over
the Economizer Maximum Position in High CO
2
Setpoint. High limit =
100%; Low limit = 0%; Default = 50%.
VCB-X Temperature & Static Setpoints
Minimum Outdoor CFM
If controlling the Outdoor Air Damper to an airfl ow setpoint, this screen
allows you to set the design Minimum Outdoor Air CFM Setpoint. High
limit = 200.00 kCFM; Low Limit = 0.10 kCFM; Default = 2.00 kCFM.
Outdoor CFM Deadband
The Outdoor CFM Setpoint uses this proportional value to calculate the
maximum reset of the minimum CFM requirements. High limit = 9999
CFM; Low Limit = 10 CFM; Default = 200 CFM.
IAQ Altitude {For CO2 Sensor}
Enter the distance above sea level for the installed Carbon Dioxide Sen-
sor. Altitude correction is required for valid readings if you are above
500 feet. High limit = 15,000 feet; Low limit = 0 feet; Default = 1000.
IAQ Minimum CO2 Setpoint
The CO
2
Minimum Setpoint is the threshold CO
2
level at which the
Economizer Minimum Position will begin to be reset higher. In between
the set minimum and maximum CO
2
levels, the Economizer Minimum
Position will be proportionally reset between the set Economizer
Minimum and Maximum position. High limit = 2000 PPM; Low limit
0 PPM; Default = 900 PPM.
IAQ Maximum CO2 Setpoint
The CO
2
Maximum Setpoint is the CO
2
level at which the Economizer
Minimum Position will be reset to the Economizer Maximum Position.
In between set minimum and maximum CO
2
levels, the Economizer
Minimum Position will be proportionally reset between the set Econo-
mizer Minimum and Maximum position. High limit = 2000 PPM; Low
limit 0 PPM; Default = 1000 PPM.
Static
Setpoints for Unit 0001
Heating Maximum Fan VFD Signal 100 %
Vent Mode Minimum Fan VFD Signal
Economizer Minimum Position
60
8
Static & Air Setpoints
Economizer Max Pos in High C 2 O
Page 1 of 4
50
Economizer Max Pos in Heating Mode 50
%
%
%
%
Figure 103: VCB-X Static & Air Setpoints Screen 1
Setpoints for Unit 0001
Minimum Outdoor CFM 2.00 kCFM
Outdoor CFM Deadband
IAQ Altitude (For C 2 Sensor) O
200
1000
Static & Air Setpoints
CFM
Feet
IAQ Minimum C 2 Setpoint O
Page 2 of 4
PPM 900
PPM IAQ Maximum C 2 Setpoint O 1000
Figure 104: VCB-X Static & Air Setpoints Screen 2