Orion System SA Controller - Manual (Page 28)

Zone
Zone
Programming
SA Controller Operator Interface 28
Setpoint Screen #8 - Stage Control Window
SA Unit Spts ID 102
Stage Control Window
Cooling.........: 5ºF
Heating.........: 5ºF
When the SA Controller is in Cooling Mode, if the Supply Air Tempera-
ture drops below the Active Supply Air Temperature Setpoint minus the
Cooling Stage Control Window value, a Cooling Stage will be deacti-
vated after its Minimum Run Time. In the Heating Mode, if the Supply
Air Temperature rises above the Active Supply Air Temperature Setpoint
plus the Heating Stage Control Window value, a Heating stage will be
deactivated after its Minimum Run Time. This staging window is also
used for the coil temperature during Dehumidifi cation Mode.
Description Minimum Default Maximum
Stage Control Window Cooling 1ºF 5ºF 20ºF
Stage Control Window Heating 1ºF 5ºF 20ºF
Setpoint Screen #9 - Entering Air Lockouts
SA Unit Spts ID 102
Entering Air Lockouts
Cooling......: 50ºF
Heating......: 70ºF
The SA Controller will Lockout Mechanical Heating or Cooling when
the Entering Air Temperature is above or below these Setpoints.
Description Minimum Default Maximum
EA Lockouts Cooling 0ºF 50ºF 100ºF
EA Lockouts Heating 35ºF 70ºF 150ºF
Setpoint Screen #10 - Cutoff Temperature
SA Unit Spts ID 102
CutOff Temperatures
Lo SAT.......: 40ºF
Hi SAT.......: 170ºF
The SA Controller will temporarily disable Heating or Cooling if while
in Heating or Cooling Mode the Supply Air Temperature rises above
the Hi SAT Cutoff Temperature Setpoint or falls below the Lo SAT
Cutoff Temperature Setpoint. See the SA Controller Technical Guide for
detailed information on the Lo and Hi Supply Air Temperature Cutoff
sequence of operation.
Description Minimum Default Maximum
Lo SAT Cutoff 0ºF 40ºF 250ºF
Hi SAT Cutoff 0ºF 170ºF 250ºF
SA Controller Setpoint Screens
Setpoint Screen #11 - Minimum Supply Fan
VFD Speed For Heating
SA Unit Spts ID 102
Minimum Supply
Fan VFD Speed
For Heating..: 30%
If the Supply Fan VFD Signal falls below the Minimum Supply Fan
VFD Speed For Heating Setpoint, Heating will be disabled.
Description Minimum Default Maximum
Min Supply Fan VFD
Speed For Heating
0% 30% 100%
Setpoint Screen #12 - Morning Warm Up Temp
SA Unit Spts ID 102
Morning WarmUp
Target Temp: 72º F
Max Length.: 60 Min
When the SA Controller is confi gured for VAV operation and the con-
troller enters the Occupied Mode, the SA Controller looks at the Enter-
ing Air Temperature to determine if the unit should initiate Morning
Warm-up Mode. If the Entering Air Temperature is below the Morning
Warm-up Target Temperature and the Max Length is greater than “0,”
the SA Controller will initiate Heating. This is considered Morning
Warm-up and will run until the Entering Air Temperature rises above
the Morning Warm-up Target Temperature or until the Max Length
Setpoint time expires.
Description Minimum Default Maximum
Morning Warm Up
Target Temp
50ºF 72ºF 90ºF
Morning Warm Up
Max Length
0 Min 60 Min 240 Min