Lennox Core Unit Controller

51
Table 12. CORE Control System Unit Parameters
Control
Parameter
No
Screen Name
Parameter Short
Description
Control Value
Units Description
Min. Default Max.
40
BLOWER MAX
OUTPUT
Constant Air
Volume with
Bypass Damper
Maximum Output
Percentage Set
Point
40 100 100 %
• Constant air volume with bypass
damper maximum output.
• This sets the maximum air delivered.
• Bypass damper motor is set to 10 to
2 volts with 10 volts being closed.
• 100% setting = 10 volts or damper
completely closed.
41
SUPPLY
MANUAL RESET
Constant Air
Volume with
Bypass Damper
Manual Reset
Value Output
Percentage Set
Point
20 52 100 %
Constant air volume with bypass damper
manual reset value output. This is the
output when unit is off.
42
STATIC
SHUTDOWN SP
Air Supply Static
Shutdown Set
Point
0 2 5 w.c.
Supply static shutdown set point. Unit will
shutdown for Parameter 110 minutes if
duct pressure exceeds this value for 20
seconds.
43
STATIC
LOCKOUT CNT
Static Pressure
Lockout Counter
Set Point
1 3 7 Counts
• The number of occurrences before
permanent lockout. Counter resets
when unit controller resets.
• Refer to Parameter 226 to either
enable or disable this feature.
44
STATIC LO
ALARM CHK
Supply Static
Sensor (A30) Low
Alarm Percentage
Set Point
30 40 100 %
• Supply Static Pressure Sensor
(A30) connected at (A133_P195_6)
(TB18_6) alarm threshold.
• Blower percent speed before
checking sensor after a 20 second
delay.
• A value of 30% disables the low
threshold or “open” alarm trap.
Electric Heating Parameters
58
HT ELEC
WARMUP DLAY
Electric Heat
Warm-up
Time Delay for
Economizer
0 60 136 Minutes
Warm-up time delay. The time that the
economizer is forced closed during warm-
up(rstoccupied+heatdemand)
60
HT ELEC BL OFF
DLAY
Electric Heat
Blower Off Delay
Set Point.
0
System
Dependent
300 Seconds
The time the blower stays on after the
heatingdemandissatised.
61
HT ELEC MAX LT
OCC
Electric Heat
Maximum Primary
and Secondary
1 3 15 Counts
Service output activation. Maximum
Primary and Secondary Limit occurrences
stored before service relay is energized.
NOTE: Heating stage is not locked out.
62
HT ELEC STAGE
DELAY
Electric Heat Time
Delay Between
Heat Stages
12 12 60 Seconds Time delay between heat stages.
63
HT ELEC STG
UP TMR
Electric Heat
Maximum Lower
Stage Run Time
in Room Sensor
Applications
0 912 3600 Seconds
• Stage up timer. The maximum time
that lower stage runs before calling
next heat stage. Used in room
sensor applications.
• Disabled if set to 0.
64
HT ELEC STG
DWN TMR
Electric Heat Time
Delay for Lower
Stage Termination
Following Higher
Stage Termination
0 0 3600 Seconds
• Time delay before a lower stage
turns off following a higher stage
termination.
• Used in room sensor applications.
Gas Heating Parameters
65
HT GAS
WARMUP DELAY
Gas Time Delay
for Economizer
Being Closed
During Warm-up
0 60 136 Minutes
Warm-up time delay. The time that the
economizer is forced closed during warm-
up(rstoccupied+heatdemand).