Lennox Core Unit Controller Setup Manual page 51

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