Lennox Core Unit Controller Setup Manual page 56

Control
Parameter Screen Name
No
HEAT RET AIR
115
LIMIT
DCV MAX
117
DAMPER OPEN
DCV DAMP
118
START OPEN
DCV DAMP FULL
119
OPEN
DCV HI TMP OV
120
FL CL
DCV HI TMP OV
121
ST CL
DCV LO TMP OV
122
FL CL
DCV LO TMP OV
123
ST CL
OAC MANUAL
127
RESET
OAC PID P
128
CONSTANT
OAC PID I
129
CONSTANT
OAC PID D
130
CONSTANT
FREE CL MAX
131
DAMPER
MIN DAMPER
132
POSITION
Table 12. CORE Control System Unit Parameters
Parameter Short
Description
Min.
Heating Return
60
Air Limit
Demand Control
Ventilation
0
Maximum
Damper Open
Demand Control
Ventilation
0
Damper Start
Open
Demand Control
Ventilation
Maximum 0
Damper Full
Open Set Point
Demand Control
Ventilation
Outdoor Air
Control Hi -31
Temperature
Override Full
Closed
Demand Control
Ventilation
Outdoor Air
Control Hi -31
Temperature
Override Start
Closing
Demand Control
Ventilation
Outdoor Air
Control Low -31
Temperature
Override Full
Closed
Demand Control
Ventilation
Outdoor Air
Control Low -31
Temperature
Override Start
Closing
Outdoor Air
Control Manual 0
Reset
Outdoor Air
Control PID P 0
Constant
Outdoor Air
Control PID I 0
Constant
Outdoor Air
Control PID D 0
Constant
Free Cooling
Maximum 0
Damper
Minimum Damper
0
Position
Control Value
Default Max.
85 100
50 100
700 2000
1200 2000
105 132
75 132
10 132
40 132
50 100
2 127
30 127
0 127
100 100
0 100
56
Units Description
• Return air limit for heating. If
the return air heating limit is
exceeded, the heating demands are
°F
interrupted.
• Parameter 113 must be set to 1 to
enable.
Maximum allowed demand control
%
ventilation damper open position.
• Damper "start open" CO
for Demand Control Ventilation.
PPM
• Level where fresh air damper begins
to open.
• Damper "full open" CO
Demand Control Ventilation.
PPM
• Level where fresh air damper is
opened to maximum.
High outdoor air temp. where fresh air
°F
damper is closed to minimum position.
High outdoor air temperature where fresh
°F
air damper begins to close.
Low outdoor air temperature where fresh
°F
air damper is closed to minimum position
Low outdoor air temp. where fresh air
°F
damper begins to close.
% Manual reset value.
Counts Outdoor Air Control PID P Constant
Counts Outdoor Air Control PID I Constant
Counts Outdoor Air Control PID D Constant
The maximum allowed fresh air damper
%
opening for free cooling.
Minimum fresh air damper position during
%
occupied operation.
set point
2
set point for
2