Lennox Core Unit Controller

66
Table 12. CORE Control System Unit Parameters
Control
Parameter
No
Screen Name
Parameter Short
Description
Control Value
Units Description
Min. Default Max.
246 ALTITUDE STPT
AdvancedAirow
Altitude Set Point
0 650 25000 Feet
ApplicabletoStandardEfciency3-to
6-ton units only.
247
BLR CALIB
RAMP RATE
Blower Calibration
Ramp Rate
4 10 40 %
ApplicabletoStandardEfciency3-to
6-ton units only.
258
DISPLAY UNITS
F/C
Display Unit
(Fahrenheit or
Celsius)
FAHRENHEIT
or
CELSIUS
Option Temperature unit of measurement.
285
FRCL COMP
LCKOUT MD
Free Cooling
Compressor
Lockout Mode
0 2 2 Option
• 0 = Disable Free Cooling Low
Ambient Compressor Lockout
(default).
• 1 = Lockout Compressor whenever
the outdoor air is suitable regardless
of outdoor air temperature.
• 2 = Enable Free Cooling Low
Ambient Compressor Lockout.
287
ALGORITHMS
ENABLED
Algorithms
Enabled
NOTE: Options for Parameter 287 are not accessible via the CORE Unit Controller user
interface. Options can be set using the Lennox UC software.
Here is an example of the selection options for Algorithms Enable via the Lennox UC Software:
Set Bit Description
0x00000002 Enable Fresh Air Heating (ALGO_FAH)
0x00000004 Enable Fresh Air Cooling (ALGO_FAC)
0x00000008 Enable DACC Return Air Reset (ALGO_DACC_RAT_RESET)
0x00000010 Enable DACC Outdoor Air Reset (ALGO_DACC_OAT_RESET)
0x00000020 Enable DACH Return Air Reset (ALGO_DACH_RAT_RESET)
0x00000040 Enable DACH Outdoor Air Reset (ALGO_DACH_OAT_RESET)
0x00000080 Enable Supply Static Pressure Sensor Alarm (ALGO_LO_STATIC_PRESSURE_
ALARM)
0x00000100 Enable Low Outdoor Temp override of DCV/OAC operation (ALGO_LO_OAT_
DCV_OAC_OVERRIDE)
0x00000200 Enable High Outdoor Temp override of DCV/OAC operation (ALGO_HI_OAT_
DCV_OAC_OVERRIDE)
0x00000800 Enable Free Cooling Blower Stage Up
.
305
LON
HEARTBEAT
TIME
LonTalk Heartbeat
Time
0 100 10,000 Seconds
Heartbeatcongurationproprietiesdene
how often a network variable update is
transmitted from a sending node.
313
FAH REHEAT
MODE
Fresh Air Reheat
Mode
0 0 3 Option
• 0 = Disabled
• 1 = Allowed, must be occupied
• 2 = Allowed, blower must be
energized and in occupied mode.
• 3 = Allow. No conditions apply.
314
MSAV MIN VFD
DR OUT
MSAV Minimum
VFD Drive Output
10 33 50 %
The CORE Unit Controller will ensure
that active VFD drive output is equal or
greater than Minimum VFD drive output.
If conversion from CFM setting to VFD
drive yields lower value. The system will
use Minimum VFD drive output instead
output.
317
OUT AIR UNIT
OPTNS
Outdoor Air Unit
Options
0 0 2 Option
This Parameter is applicable in Zone
Sensor mode (i.e. not applicable for local/
remote thermostat mode).
321
ENTH HIGH TMP
LIMT
Enthalpy High
Temperature Limit
45 75 85 °F
When in Enthalpy mode, the outdoor air
suitability (OAS) will be set only if the
outdoor air temperature is lesser than this
Parameter set point.
323
ZON SNSR CAL
OFFSET
Zone Sensor
Calibration Offset
-5 0 5 °F
This setting is applicable to local
temperature sensor only.
327
BPC MANUAL
RESET
Building Pressure
Control Manual
Reset
0 50 100 %
Manual reset value. This Parameter
denesthedefaultoutdoorairdamper
position