Orion System System Manager TS II In-House - Manual (Page 38)

VCM & VCM-X Controllers
SMTS II Technical Guide 38
VCM & VCM-X Staging Delay & Miscellaneous Setpoints
Heating Min 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 minute; Default = 1 minute.
Warm-up Timeout
If the equipment has entered the Morning Warm-up Mode, it will remain
in that mode until the Return Air Temperature rises above the Morning
Warm-up Setpoint or until this Warm-up Timeout expires. The Warm-
up Timeout must be greater than zero for Morning Warm-up to occur.
High limit = 240 minutes; Low limit = 0 minutes; Default = 60 minutes.
Misc
Fan Starting Delay
This is the Supply Fan Starting Delay Timer initiated whenever the VCM-
X initiates Supply Fan operation. This is useful when you are using mul-
tiple VCM-X-controlled HVAC units and want to be sure that all the units
do not start at exactly the same time when the Occupied schedule occurs.
Each VCM-X should be set with staggered Fan Starting Delay Setpoint
values. When the 255-second default setpoint is used, it multiplies each
VCM-X controller’s address by 5 and uses this value in seconds as the
Fan Starting Delay Time. This provides a staggered start for each VCM-X
controller on the system without having to individually set each VCM-X
controller for its own time delay. High limit = 255 seconds; Low limit =
0 seconds; Default = 255 seconds.
Heat Pump Delay
If your VCM-X is confi gured to operate as a Heat Pump, the Heat Pump
Auxiliary Heating Delay Setpoint can be confi gured to provide a time delay
period before Auxiliary Heating Stages can be activated once activation
of the Compressor Heating Stages have been initiated. High limit = 30
minutes; Low limit = 0 minutes; Default = 3 minutes.
Mod Cooling Time Period
The Time Period is the delay before another signal increase or decrease
can be made and is user-adjustable. Short Time Periods may cause hunt-
ing of the Modulating Signal. This is the rate at which the Modulating
Cooling Signal is calculated. High limit = 250 seconds; Low limit = 5
seconds; Default = 30 seconds.
Mod Heating Time Period
The Mod Heating Time Period is the delay before another signal increase
or decrease can be made and is user-adjustable. Short Time Periods may
cause hunting of the Modulating Signal. This is the rate at which the
Modulating Heating Signal is calculated. High limit = 250 seconds; Low
limit = 5 seconds; Default = 5 seconds.
Setpoints for Unit 0102
Fan Starting Delay 255 Sec
Heat Pump Delay 3
Staging Delays
Min
Page 3 of 3
Mod Cooling Time Period 5 Sec
Mod Heating Time Period 5 Sec
Figure 63: VCM-X Staging Delays Setpoints Screen 3
Miscellaneous Setpoints
Touch the
< Miscellaneous>
button to access the
Miscellaneous Setpoint Screens.
Figure 64: VCM-X Miscellaneous Setpoints Screen 2
Controlling Week Schedule
If the VCM is not using its own internal week schedule, enter the external
schedule number that will control this unit. Enter 0 to use the internal
schedule. Enter 1 through 5 to use an external schedule. A GPC Plus
is required for schedules 1 through 5. High limit = 5; Low limit = 0;
Default = 0.
Push-Button Override Duration
If the VCM-X has a Space Temperature Sensor installed and it has the
Override Button option, the HVAC unit will initiate the Occupied Mode
any time the Override Button is pressed and held for less than 3 seconds.
The Push-Button Override Duration Setpoint allows you to adjust the
amount of time the Override will remain in effect when the Override
Button is pressed. To cancel the Override before the Override Duration
time period expires, press the Override Button for 5 to 10 seconds. High
limit = 8 hours; Low limit = 0 hours; Default = 2 hours.
Maximum Slide Offset Effect
If the VCM-X has a Space Temperature Sensor with the Slide Adjust
option installed, the HVAC Mode Enable Heating and Cooling Setpoints
can be offset by the Maximum Slide Offset Effect Setpoint. When the
Slide Adjust bar is in the middle, no offset will occur. If the Slide Adjust
bar is moved all the way to the top of the Sensor, the Heating and Cooling
Setpoints will be raised by the Setpoint value you have entered. If the
Slide Adjust bar is moved all the way down to the bottom of the Sensor,
the Heating and Cooling Setpoints will be lowered by the Setpoint value
you have entered. High limit = 10ºF; Low limit = 0ºF; Default = 0ºF.
Optimal Start Soak Factor
If you are using the Optimal Start feature, you can force the calculated
start to time to activate. The Optimal Start Soak Factor is a multiplier that
if set to a number greater than 0 will be used as a multiplier for calculat-
ing the Optimal Start Time for the HVAC unit. This multiplier is only
applied if the unit has been off for more than 24 hours. See the VCM-X
Controller Technical Guide for more detailed information regarding the
Optimal Start. This multiplier is only applied if you are using the VCM-
X Internal Schedule. High limit = 5.0; Low limit = 0.0; Default = 0.0.
CO2 Sensor Scaling
If you have installed a CO
2
sensor for Indoor Air Quality, enter the maxi-
mum reading the sensor can provide when the maximum input signal is
applied. High limit = 3000 ppm; Low limit = 0 ppm; Default =2000 ppm.