Orion System PT-Link II LON - Manual (Page 51)

PT-Link II Interface
PT-Link II LON ® Technical Guide
51
Appendix F - SA Controller LON Parameters
SNVTs for the SA Controller
Binary Output SNVTs are SNVT_lev_disc
all other SNVTs are SNVT_count_inc_f
Parameter Name Object Description Limits
Unoccupied
Heating
Offset
UnHtOst Analog
Input
During the
Unoccupied Mode
of Operation, this
Setpoint spreads
the Occupied
Heating Setpoint
out by a user
adjustable amount.
If you do not want
Heating to operate
during the Unoc-
cupied Mode, use
the default setting
of 30°F for these
setpoints.
0 30
Static
Pressure
Setpoint
DuctPrSt Analog
Input
This is the target
duct pressure to be
maintained by the
VFD blower signal.
0.01 3
Preheater
Setpoint
PreHtSp Analog
Input
Low Outside Air
Ambient
Protection Setpoint
0 100
Entering
Air Offset
Setpoint
EaTpOst Analog
Input
If the Entering
Air Temperature
Sensor is reading
incorrectly, you
can use this option
to enter an offset
temperature to
adjust the Sensor’s
Temperature.
Entering
Water
Offset
Setpoint
EwTpOst Analog
Input
If the Entering
Water Temperature
Sensor is reading
incorrectly, you
can use this option
to enter an offset
temperature to
adjust the
Sensor’s
Temperature.
Bad Supply
Air Sensor
SaTpAlm Binary
Output Alarm that
indicates a failure
in the supply air
sensor.
Cooling
Enabled
ClEnbl Binary
Output
Status that indicates
mechanical cooling
is enabled.
Economizer
Enabled
EcoEnbl Binary
Output Status that indicates
the economizer is
enabled.
Fan Start Up
Delay
FanDly Binary
Output
Status that indicates
the fan is com-
manded to run, but
it is in the start up
delay mode.
SNVTs for the SA Controller
Binary Output SNVTs are SNVT_lev_disc
all other SNVTs are SNVT_count_inc_f
Parameter Name Object Description
Fan
Proving
Alarm
PofAlm Binary
Output Alarm that indicates a failure in
the fl ow of the VFD blower.
Heating
Enabled
HtEnbl Binary
Output Status that indicates that
mechanical heating is enabled.
High
Supply Air
Temperature
Alarm
HiSaAlm Binary
Output The Supply Air has risen above
the Hi SAT Cutoff Setpoint.
Heating stages begin to
deactivate and the fan
continues to run.
Low Supply
Air
Temperature
Alarm
LoSaAlm Binary
Output The Supply Air has fallen below
the Hi SAT Cutoff Setpoint and
cooling stages will begin to
deactivate. If the unit is in
Economizer, Vent, or Heating
Mode the Supply Fan
will shut off.
MODGAS II
Connected
MdHt2Ins Binary
Output Status that indicates
the MODGAS II controller
is connected.
REHEAT II
Connected
Rt2Ins Binary
Output Status that indicates
the MHGRV
controllers is connected
to the system.
Mechanical
Cooling
Alarm
MchClAlm Binary
Output Compressor Relays are enabled
but the Supply Air Temperature
has not fallen 5°F w/in a user-
adjustable time period. This does
not indicate compressors are
active and will not
shut the unit down.
Mechanical
Heating
Alarm
MchHtAlm Binary
Output Heating Mode has been initiated
but the Supply Air Temperature
has not risen 5°F w/in a
user-adjustable time period.
This does not indicate heat
stages are active and will not
shut the unit down.
Dirty Filter
Detected
DrtFlAlm Binary
Output Alarm that indicates
the fi lters are dirty.
Control
Temperature
Cool Failure
CtrlTpCF Binary
Output This alarm is activated if the
control temperature does not
get within 5°F to the occupied
cooling setpoint in an hour in the
cooling mode. This alarm is not
used in 100% outside air units or
supply air control.
Control
Temperature
Heat Failure
CtrlTpHF Binary
Output This alarm is activated if the
control temperature does not
get within 5°F to the occupied
heating setpoint in an hour in the
heating mode. This alarm is not
used in 100% outside air units or
supply air control.