PT-Link II N2-3 Interface
PT-Link II N2-3
®
Technical Guide
25
Appendix B - VCM-X WSHP N2 Parameters
NOTE:
The following points for the VCM-X WSHP Controllers
are additional points. All points and property identifi ers
in the VCM-X Controller table (
pages 27-32
) also apply
to the VCM-X WSHP Controllers.
N2 Properties for VCM-X WSHP (Tulsa)
Parameter
Name
Object
Description
Limits
Modulating
Compressor 2
MdCmp2
AI: 206
Current position
of the
2nd Stage of
Compressor
Modulation.
Head Pressure 1
HdPr1
AI: 207
Head Pressure
for
1st Compressor
Head Pressure 2
HdPr2
AI: 208
Head Pressure
for
2nd Compressor
Condenser Fan 1
CdFan1
AI: 209
Condenser Fan 1
Signal Status
Condenser Fan 2
CdFan2
AI: 210
Condenser Fan 2
Signal Status
Water Temp. A
WaterTpA
AI: 220
Current water
temperature of
refrigerant for
System A.
Water Temp. B
WaterTpB
AI: 221
Current water
temperature of
refrigerant for
System B.
Compressor A1
Low Suction
Pressure Alarm
A1LSPAlm
BI: 222
Alarm that
indicates
Suction Pressure
for
Compressor A1
is below the Low
Suction Pressure
Cooling (Heat-
ing) Setpoint.
Compressor A1
Lockout Alarm
A1LktAlm
BI: 223
Alarm that
indicates
Compressor A1
is locked out.
N2 Properties for VCM-X WSHP (Tulsa)
Parameter
Name
Object
Description
Limits
Compressor A2
Low Suction
Pressure Alarm
A2LSPAlm
BI: 224
Alarm that
indicates
Suction Pressure
for
Compressor A2
is below the Low
Suction Pressure
Cooling (Heat-
ing) Setpoint.
Compressor A2
Lockout Alarm
A2LktAlm
BI: 225
Alarm that
indicates
Compressor A2
is locked out.
Compressor B1
Low Suction
Pressure Alarm
B1LSPAlm
BI: 226
Alarm that
indicates
Suction Pressure
for
Compressor B1
is below the Low
Suction Pressure
Cooling (Heat-
ing) Setpoint.
Compressor B1
Lockout Alarm
B1LktAlm
BI: 227
Alarm that
indicates
Compressor B1
is locked out.
Compressor B2
Low Suction
Pressure Alarm
B2LSPAlm
BI: 228
Alarm that
indicates
Suction Pressure
for
Compressor B2
is below the Low
Suction Pressure
Cooling (Heat-
ing) Setpoint.
Compressor 4
Lockout Alarm
B2LktAlm
BI: 229
Alarm that
indicates
Compressor B2
is locked out.
Low Water
Temperature 1
Alarm
LWT1Alm
BI: 230
Alarm that
indicates water
temperature
is below the
Leaving Water
Safety Setpoint
(Heating only)
for System A.
Low Water
Temperature 2
Alarm
LWT2Alm
BI: 231
Alarm that
indicates water
temperature
is below the
Leaving Water
Safety Setpoint
(Heating only)
for System B
Proof of Water 1
Flow Alarm
POWF1Alm
BI: 232
Alarm that indi-
cates no Proof of
Water Flow for
System A (A1/
A2)
NOTE:
When a new setpoint is received from N2, it is main-
tained and used in temporary memory until the unit goes
unoccupied. It is then stored in permanent memory and
will become the new default setpoint even if power is
cycled. Therefore, if power is cycled prior to the unit
going unoccupied, the setpoint will not have been stored
in permanent memory.
NOTE:
Objects labeled AI and BI are read-only. Objects labeled
AO are read/writeable. You cannot write directly to Sensor
Inputs.
