Orion System VCM - Manual (Page 25)

Operator Interfaces
Technical Guide
25
Setpoint Screen #8
VCM Spts ID 59
Cutoff Temperature
Lo SAT: 40 ° F
Hi SAT: 150 ° F
The VCM 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 VCM 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
0
°
F 40
°
F 250
°
F
Hi SAT Cutoff
0
°
F 170
°
F 250
°
F
Setpoint Screen #9
VCM Spts ID 5
Minimum Supply
Fan VFD Speed
For Heating: 50%
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
%
50% 100%
Setpoint Screen #6
VCM Spts ID 59
Stage Control Window
Cooling...: 5 ° F
Heating...: 5 ° F
When the VCM controller is in Cooling Mode, if the Supply Air Tem-
perature drops below the Active Supply Air Temperature Setpoint mi-
nus the Cooling Stage Control Window value, a Cooling Stage will be
deactivated after its Minimum Run Time. In the Heating Mode, if the
Supply Air Temperature rises above the Active Supply Air Tempera-
ture Setpoint plus the Heating Stage Control Window value, a Heating
stage will be deactivated after its Minimum Run Time.
Description Minimum Default Maximum
Stage Control Window
Cooling
1
°
F 5
°
F 20
°
F
Stage Control Window
Heating
1
°
F 5
°
F 20
°
F
Setpoint Screen #7
VCM Spts ID 59
Outdoor Air Lockouts
Cooling...: 50 ° F
Heating...: 75 ° F
The VCM will Lockout Mechanical Heating or Cooling when the Out-
door Air Temperature is above or below these Setpoints.
Description Minimum Default Maximum
Outdoor Air Lockouts
Cooling
0
°
F 50
°
F 80
°
F
Outdoor Air Lockout
Heating
50
°
F 70
°
F 90
°
F