Orion System VCM-X/RNE Operator Interfaces - Manual (Page 41)

VCM-X / RNE Operator Interfaces Technical Guide
VCM-X / RNE SETPOINTS
41
Setpoint Screen #8 - Stage Control Window
VCM-X / RNE Spts
Stage Control Window
Cooling.........: 5ºF
Heating.........: 5ºF
When the VCM-X or RNE is in Cooling Mode, if the Supply Air
Temperature drops below the Active Supply Air Temperature Setpoint
minus 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 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 5ºF 5ºF 30ºF
Stage Control Window Heating 5ºF 5ºF 30ºF
Setpoint Screen #9 - Outdoor Air Lockouts
VCM-X / RNE Spts
Outdoor Air Lockouts
Cooling......: 50ºF
Heating......: 70ºF
The VCM-X or RNE will Lockout Mechanical Heating or Cooling when
the Outdoor Air (OA) Temperature is above or below these Setpoints.
On Air to Air Heat Pump units, Compressor Cooling and Heating can
only operate if the OA Temperature is above the Outdoor Air Cooling
Lockouts. If using the VCM-X WSHP (Water Source Heat Pump) Con-
troller, the OA Cooling Lockout is ignored. Since Emergency Heat can
only be used below the Compressor Lockouts, Emergency Heat is there-
fore not available on WSHP units using the VCM-X WSHP Controller.
Description Minimum Default Maximum
OA Lockouts Cooling 0ºF 50ºF 100ºF
OA Lockouts Heating 50ºF 70ºF 150ºF
Setpoint Screen #10 - Cutoff Temperature
VCM-X / RNE Spts
Cutoff Temperatures
Lo SAT.......: 40ºF
Hi SAT.......: 170ºF
The VCM-X or RNE will temporarily disable Heating or Cooling if
while in Heating or Cooling Mode the Supply Air Temperature rises
above the High SAT Cutoff Temperature Setpoint or falls below the Low
VCM-X / RNE Setpoint Screens
SAT Cutoff Temperature Setpoint. See the VCM-X Controller Technical
Guide, VCM-X Modular E-BUS Controller Technical Guide, or RNE
Controller Technical Guide for detailed information on the Low and
High Supply Air Temperature Cutoff sequence of operation.
Description Minimum Default Maximum
Lo SAT Cutoff 0ºF 40ºF 250ºF
Hi SAT Cutoff 0ºF 170ºF 250ºF
Setpoint Screen #11 - Minimum Supply Fan
VFD Speed For Heating
VCM-X / RNE Spts
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
VCM-X / RNE Spts
Morning WarmUp
Target Temp: 72º F
Max Length.: 60 Min
When the VCM-X or RNE is confi gured for VAV operation and the
controller enters the Occupied Mode, the VCM-X or RNE looks at the
Return Air Temperature to determine if the unit should initiate Morning
Warm-up Mode. If the Return Air Temperature is below the Morning
Warm-up Target Temperature and the Max Length is greater than “0,”
the VCM-X or RNE will initiate Heating. This is considered Morning
Warm-up and will run until the Return 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