Orion System VCC-X Controller - Manual (Page 101)

VCC-X Controller Technical Guide
APPENDIX D - VCC-X BACnet ®
101
VCC-X BACnet ® Parameters
BACnet ® Properties for the VCC-X Controller
Parameter Object Description Limits
Low Ambient
Protection
Setpoint
AV:36 Temperature at which the
Low Ambient Relay will
activate in the Occupied or
Unoccupied Mode.
-30 70
SAT Cool
Setpoint Reset
Source Low
Limit
AV: 37 If doing Supply Air Setpoint
Reset, this is the Low Reset
Source value in Cooling
that will correspond to the
Supply Air Cool High Reset
Setpoint.
-30 150
SAT Cool
Setpoint Reset
Source High
Limit
AV: 38 If doing Supply Air Setpoint
Reset, this is the High Reset
Source value in Cooling
that will correspond to the
Supply Air Cooling Setpoint
(Low Reset).
1 150
SAT Heat
Setpoint Reset
Source Low
Limit
AV: 39 If doing Supply Air Setpoint
Reset, this is the Low Reset
Source value in Heating that
will correspond to the
Supply Air Heating High
Reset Setpoint.
-30 150
SAT Heat
Setpoint Reset
Source High
Limit
AV: 40 If doing Supply Air Setpoint
Reset, this is the High Reset
Source value in Heating
that will correspond to the
Supply Air Heating Setpoint
(Low Reset).
1 150
Control
Temperature
High Alarm
Offset
AV:41 If the temperature of the
controlling sensor rises
above the Occupied Cooling
Setpoint by this value, a
High Control Temp Alarm
will occur. Only applies
if confi gured for Space or
Return Air Temp Control, or
as Single Zone VAV.
0 50
Control
Temperature
Low Alarm
Offset
AV:42 If the temperature of the
controlling sensor falls
below the Occupied Heating
Setpoint by this value, a
Low Control Temp Alarm
will occur. Only applies
if confi gured for Space or
Return Air Temp Control, or
as Single Zone VAV.
0 50
Heat Pump
Compressor
Heat Lockout
AV:43 Compressor Heat will
be locked out below this
setpoint.
-30 100
Maximum
Main Fan
VFD in Heat
Mode
AV:44 In Single Zone VAV
confi guration, this is the
max fan speed the VFD
can modulate up to in Heat
Mode.
0 100
BACnet ® Properties for the VCC-X Controller
Parameter Object Description Limits
Minimum
Main Fan
VFD in
Cooling Mode
AV:45 In Single Zone VAV
confi guration, this is the fan
speed at which the VFD will
start when Cooling is
initiated. In a VAV
confi guration this is the
lowest fan speed allowed in
the Cooling Mode. In CAV
and MUA confi gurations
this should be set to 100%.
0 100
Minimum
Main Fan
VFD in
Heating Mode
AV:46 In Single Zone VAV
confi guration, this is the
fan speed at which the VFD
will start when Heating is
initiated. In a VAV
confi guration this is the
lowest fan speed allowed in
the Heating Mode. In CAV
and MUA confi gurations
this should be set to 100%.
0 100
Minimum
Main Fan
VFD in Vent
Mode
AV:47 Speed at which the VFD
will operate in the Vent
Mode in Single Zone VAV.
0 100
Maximum
Economizer in
Heating Mode
AV:48 Max position the
Economizer Damper can
open in the Heating Mode.
Takes priority over Max
Position in High CO2.
0 100
Minimum
Economizer
Position
AV:49 The minimum position of
the Outdoor Air damper in
the Occupied Mode. This
can be reset upwards based
on indoor CO2 levels.
0 100
Maximum
Economizer
CO2 Reset
Limit
AV:50 The maximum value the
Economizer
Minimum Position can be
reset up to
during CO2 override.
0 100
CO
2
Minimum
Setpoint
AV:51 This is the threshold CO
2
level at which the
Economizer Min Damper
Position Setpoint will begin
to be reset higher.
0 2000
CO
2
Maxi-
mum
Setpoint
AV:52 This is the CO
2
level at
which the Economizer Min
Damper Position will be re-
set to the Economizer Max
Position in High CO
2
. In
between the Min and Max
CO
2
levels the Economizer
Min Damper Position will
be proportionally reset
between the confi gured Min
Damper Position and the
Max Position in High CO
2
.
0 2000