Lennox Core Unit Controller Setup Manual page 50

Control
Parameter Screen Name
No
PWREXH STG2
30
MIN BLR
SUPPLY PID P
31
CONST
SUPPLY PID I
32
CONST
SUPPLY PID D
33
CONST
BLR STC PRESS
34
SMK SP
BLR STC PRES
35
VT SP
BLR STC PRES
36
HT SP
BLR STC PRES
37
CL SP
MIN OUTPT CL
38
VT SMK
MIN OUTPUT
39
HEAT
Table 12. CORE Control System Unit Parameters
Parameter Short
Description
Min.
Power Exhaust
Stage 2 Minimum 0
Blower
Supply
Proportional
Base Control
Loop for Variable
0
Air Volume or
Constant Air
Volume with
Bypass Damper
Supply Integral
Base Control
Loop for Variable
Air Volume or 0
Constant Air
Volume with
Bypass Damper
Supply Derivative
Base Control
Loop for Variable
Air Volume or 0
Constant Air
Volume with
Bypass Damper
Constant Air
Volume with
Bypass Damper
0
Static Pressure
Set Point During
Smoke Alarm
Constant Air
Volume with
Bypass Damper
0
Static Pressure
Set Point for
Ventilation
Constant Air
Volume with
Bypass Damper
0
Static Pressure
Set Point for
Heating
Constant Air
Volume with
Bypass Damper
0
Static Pressure
Set Point for
Cooling
Constant Air
Volume with
Bypass Damper
Minimum Output
20
Percentage Set
Point for Cooling,
Ventilation and
Smoke Alarms
Constant Air
Volume with
Bypass Damper
20
Minimum Output
Percentage Set
Point for Heating
Control Value
Default Max.
70 100
17 127
12 127
0 127
1 5
1 5
1 5
1 5
20 100
20 100
50
Units Description
% Power Exhaust Stage 2 Minimum Blower
Variable Air Volume or Constant Air
Counts Volume with Bypass Damper supply PID
Proportional constant.
Variable Air Volume or Constant Air
Counts Volume with Bypass Damper supply PID
Integral constant.
Variable Air Volume or Constant Air
Counts Volume with Bypass Damper supply PID
derivative constant.
Constant air volume with bypass damper
w.c. static pressure set point during smoke
alarm.
Constant air volume with bypass damper
w.c.
static pressure set point for ventilation.
Constant air volume with bypass damper
w.c.
static pressure set point for heating
Constant air volume with bypass damper
w.c.
static pressure set point for cooling
• Constant air volume with bypass
damper minimum output for cooling,
ventilation and during smoke alarms.
This sets the minimum air delivered.
%
• Bypass damper motor is set to 10 to
2 volts with 10 volts being closed.
• 20% setting = 2 volts or damper
completely opened.
• Constant air volume with bypass
damper minimum output for heating.
• This sets the minimum air delivered.
%
• Bypass damper motor is set to 10 to
2 volts with 10 volts being closed.
• 20% setting = 2 volts or damper
completely opened.