PT-Link II N2-3 Interface
PT-Link II N2-3
®
Technical Guide
35
Appendix D - SA Controller N2 Parameters
N2 Properties for SA Controller
Parameter
Name
Object
Description
Limits
Unoccupied
Heating
Offset
UnHtOst
AO: 125
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
AO: 152
This is the target
duct pressure to be
maintained by the
VFD blower signal.
0.01
3
Preheater
Setpoint
PreHtSp
AO: 196
Low Outside Air
Ambient
Protection Setpoint
0
100
Entering
Air Offset
Setpoint
EaTpOst
AO: 238
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
AO: 239
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.
N2 Properties for SA Controller
Parameter
Name
Object
Description
Bad Supply
Air Sensor
SaTpAlm
BI: 2
Alarm that indicates a failure in
the supply air sensor.
Cooling
Enabled
ClEnbl
BI: 6
Status that indicates
mechanical cooling is enabled.
Economizer
Enabled
EcoEnbl
BI: 15
Status that indicates
the economizer is enabled.
Fan Start Up
Delay
FanDly
BI: 25
Status that indicates
the fan is commanded to run, but
it is in the start up delay mode.
Fan
Proving
Alarm
PofAlm
BI: 26
Alarm that indicates a failure in
the fl ow of the VFD blower.
Heating
Enabled
HtEnbl
BI: 30
Status that indicates that me-
chanical heating is enabled.
High
Supply Air
Temperature
Alarm
HiSaAlm
BI: 33
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
BI: 37
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
BI: 39
Status that indicates
the MODGAS II controller is
connected.
REHEAT II
Connected
Rt2Ins
BI: 58
Status that indicates
the MHGRV
controllers is connected to the
system.
Mechanical
Cooling
Alarm
MchClAlm
BI: 94
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.
