Lennox Core Unit Controller

53
Table 12. CORE Control System Unit Parameters
Control
Parameter
No
Screen Name
Parameter Short
Description
Control Value
Units Description
Min. Default Max.
83 LAC SP TEMP 1
Low Ambient
Outdoor Air Limit
Temperature 1
Set Point
10 40 60 ºF
• Low ambient outdoor air limit temp.
1. Parameters 83 and 84 are used
to shed fans.
• Temperature setting must be less
than or equal to Parameter 84.
84 LAC SP TEMP 2
Low Ambient
Outdoor Air Limit
Temperature 2
Set Point
10 55 60 ºF
• Low ambient outdoor air limit temp.
2. Parameters 83 and 84 are used
to shed fans.
• Temperature setting must be greater
than or equal to Parameter 83.
85
COMP1 LO TMP
LCKOUT
Low Ambient
Temperature
Lockout for
Compressor 1
-31
Default may
be altered at
factory test.
80 ºF
• Low ambient lockout for compressor
1.
• A value of (-31°F) will disable low
ambient lockout function.
• Temperature setting must be less
than or equal to Parameter 86.
86
COMP2 LO TMP
LCKOUT
Low Ambient
Temperature
Lockout for
Compressor 2
-31
Default may
be altered at
factory test.
80 ºF
• Low ambient lockout for compressor
2.
• A value of (-31ºF) will disable low
ambient lockout function.
• Temperature setting must be greater
than or equal to Parameter 85 and
less than or equal to Parameter 87.
87
COMP3 LO TMP
LCKOUT
Low Ambient
Temperature
Lockout for
Compressor 3
-31
Default may
be altered at
factory test.
80 ºF
• Low ambient lockout for compressor
3.
• A value of (-31ºF) will disable low
ambient lockout function.
• Temperature setting must be greater
than or equal to Parameter 86 and
less than or equal to Parameter 88.
88
COMP4 LO TMP
LCKOUT
Low Ambient
Temperature
Lockout for
Compressor 4
-31
Default may
be altered at
factory test.
80 ºF
• Low ambient lockout for compressor
4.
• A value of (-31ºF) will disable low
ambient lockout function.
• Temperature setting must be greater
than or equal to Parameter 87.
89
COMP MIN OFF
DELAY
Compressor
Minimum Off
Delay
60 300 510 Seconds Compressor minimum off delay.
91
COMP MIN RUN
TIME
Compressor
Minimum Run
Time
60 240 510 Seconds Compressor minimum run time.
98
MAX HP
OCCURRENCES
Maximum
High Pressure
Occurrences
1 3 7 Occurrences
Maximum High Pressure occurrences
that are stored before control locks off
compressor stage and energizes the
service output.
99
MAX LP
OCCURRENCES
Maximum
Low Pressure
Occurrences
1 3 7 Occurrences
Maximum Low Pressure occurrences
that are stored before control locks off
compressor stage and energizes the
service relay.
100
LP SW IGNORE
TIME
Low Pressure
Switch Ignore
Time
0 120 600 Seconds Low Pressure Switch Ignore Time
101
CL STG 2
STGUP TIME
Maximum Stage
1 Cooling Time
Before Call for
Stage 2 Cooling
0 912 3600 Seconds
• Stage 2 stage up timer. The
maximum time that cooling stage 1
runs before calling cooling stage 2.
• Used in room sensor applications.
• Disabled if set to 0.