Lennox Core Unit Controller

54
Table 12. CORE Control System Unit Parameters
Control
Parameter
No
Screen Name
Parameter Short
Description
Control Value
Units Description
Min. Default Max.
102
CL STG 3
STGUP TIME
Maximum Stage
2 Cooling Time
Before Call for
Stage 3 Cooling
0 912 3600 Seconds
• Stage 3 stage up timer. The
maximum time that cooling stage 2
runs before calling cooling stage 3.
• Used in room sensor applications.
• Disabled if set to 0.
103
CL STG 4
STGUP TIME
Maximum Stage
3 Cooling Time
Before Call for
Stage 4 Cooling
0 912 3600 Seconds
• Stage 4 stage up timer. The
maximum time that cooling stage 3
runs before calling cooling stage 4.
• Used in room sensor applications.
• Disabled if set to 0
104
CL STAGE
DOWN TIME
Cooling Stage
Down Time
0 912 3600 Seconds
• Time delay before a lower stage
turns off following a higher stage
termination.
• Used in room sensor applications.
105 DEHUMID MODE
Dehumidication
Mode
0
0 - No
Humiditrol is
installed
6 - All Others
(Check Unit
Parameter
Label)
7 Option
DehumidicationMode
• 0 = No reheat.
• 1 = Supermarket reheat using De-
Humidistat (wired thermostat mode
only)
• 2 = Supermarket reheat using
relative humidity sensor.
• 3 = Humiditrol reheat. Conditions:
Blower must be energized, Must
be occupied, At least one previous
cooling demand.
• 4 = Relative Humidity measurement
/ display. No Supermarket or
Humiditrol reheat.
• 5 = Humiditrol reheat. Conditions: At
least one previous cooling demand.
• 6 = Humiditrol reheat. Conditions:
Blower must be energized, Must be
occupied.
• 7 = Humiditrol reheat. Conditions:
None
106
DEHUMID
SETPOINT
Dehumidication
Set Point
0
Default may
be altered at
factory test.
99 % RH
• Percent relative humidity where
supermarket or Humiditrol reheat
demand is energized. Used of
dehumid mode option 2, 3, 5, 6 or
7.Dehumidicationisde-energized
at set point – dead-band (Parameter
107)).
• Digital Input 4 only. Energized input
signalcallsfordehumidication
demand. L Connection Network
Relative Humidity set point will
override this set point. (Such as from
NCP).
107
DEHUMID
DEADBAND
Dehumidication
Dead Band
(neutral zone)
1 3 10 % RH
UsedofdehumidicationParameter105,
option2,3,5,6or7.Dehumidicationis:
• ON when relative humidity is equal
to or greater than Parameter 106.
• OFF when Relative Humidity is
less than Parameter 106 minus
Parameter 107.
108
FREE LO AMB
LCKT SP
Free Cooling Low
Ambient Lockout
Set Point
45 55 80 °F
When outdoor air is suitable for free
cooling and an economizer is present, the
compressor will not run when ambient is
below this value.