Orion System System Manager TS II In-House - Manual (Page 57)

SMTS II Technical Guide
VCM, VCM-X & VCB-X Controllers
57
VCB-X Controllers
VCB-X Staging Delay Setpoints
Heating Stage Up Delay Time
This is the amount of time that must elapse between each Heat Stage
activation to prevent all Heat Stages from activating at the same time
due to large heating demands. High limit = 15 minutes; Low limit = 3
minutes; Default = 3 minutes.
Heating Stage Down Delay Time
This is the amount of time that must elapse between each Heat Stage
deactivation to prevent all Heat Stages from deactivating at once as
the heating demand decreases. High limit = 15 minutes; Low limit = 1
minute; Default = 1 minute.
Heating Minimum Run Time
This is the minimum amount of time the Heat Stages must remain on
once they have been activated. This overrides the Stage Down Delay if
that is not as long as this delay. High limit = 15 minutes; Low limit =
2 minutes; Default = 5 minutes.
Heating Minimum Off Time
Once a Heat Stage has been staged back off, it must remain off for this
amount of time to prevent short cycling. High limit = 15 minutes; Low
limit = 1 minutes; Default = 1 minute.
Mod Heating Time Period
The Mod Heating Time Period is the delay before another Modulating
Heating Signal increase or decrease can be made and is user-adjustable.
Short Mod Heating Time Periods may cause hunting of the Modulat-
ing Heating Signal. This is the rate at which the Modulating Heating
Signal is calculated. High limit = 240 seconds; Low limit = 5 seconds;
Default = 30 seconds.
Heat/Cool Changeover Delay
The amount of time that must elapse after the last stage has turned off
before switching to the opposite HVAC mode. High limit = 20 minutes;
Low limit = 0 minutes; Default = 5 minutes.
Mechanical Heat/Cool Alarm Timer
Enter a time delay between 0-240 minutes for a delay in the time that it
takes the Mechanical Heat/Cool Alarm to be generated. When Heating
or Cooling Mode is initiated and staging is activated, if the Supply Air
Temperature does not rise or fall 5°F within this time period, a Mechani-
cal Heating or Cooling failure alarm will be generated. The Alarm is
for Status Reporting only. The HVAC unit will continue to run. This
alarm does not apply if Modulating Cooling or Heating are confi gured.
High limit = 240 minutes; Low limit = 0 minutes; Default = 15 minutes.
Heat Pump Aux Heat Delay
If the Supply Air is not reaching setpoint, Auxiliary Heat can be added
after this amount of delay running at full heating. High limit = 60 min-
utes; Low limit = 0 minutes; Default = 3 minutes.
Economizer Control Loop Time
This is the time period between changes to the Economizer position.
High limit = 30 seconds; Low limit = 1 seconds; Default = 10 seconds.
Building Pressure Control Rate
The Building Pressure Control Rate is the time period between changes
to the Building Pressure Control signal. High limit = 30 seconds; Low
limit = 1 second; Default = 10 seconds.
Setpoints for Unit 0001
Heating Stage Up Delay Time
Heating Minimum Off Time
Mod Heating Time Period
3
1
30
Min
Heating Stage Down Delay Time
Heating Minimum Run Time
1
5
Staging Delays
Min
Min
Min
Min
Page 2 of 5
Figure 108: VCB-X Staging Delay Setpoints Screen 2
Setpoints for Unit 0001
Heat/Cool Changeover Delay
Economizer Control Loop Time
Building Pressure Control Rate
5
10
10
Min
Mechanical Heat/Cool Alarm Timer
Heat Pump Aux Heat Delay
15
30
Staging Delays
Min
Min
Min
Min
Page 3 of 5
Figure 109: VCB-X Staging Delay Setpoints Screen 3