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Table 64. M3 Control Parameters
Control Parameter
DescriptionUnits
Control Value
No DescriptionUnitsMax.DefaultMin.Parameter Short DescriptionScreen Name
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 Dehumidification Mode 0
0 - No Humiditrol is
installed
6 - All Others
(Check Unit
Parameter Label)
7 Option
Dehumidification 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 Dehumidification Setpoint 0
Check unit parameter
label as 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. Dehumidification is de-energized at set point – dead-band
(parameter 107)).
Digital Input 4 only. Energized input signal calls for dehumid
demand. L Connection Network Relative Humidity set point
will override this set point. (Such as from NCP).
107 DEHUMID DEADBAND
Dehumidification Dead Band
(neutral zone)
1 3 10 % RH
Used of dehumidification option 2, 3, 5, 6 or 7. Dehumidification is :
ON when relative humidity is equal to or greater than Paramet
er126.
OFF when Relative Humidity is less than Parameter126 minus
Parameter107.
108 FREE LO AMB LCKT SP
Free Cooling Low Ambient
Lockout Setpoint
45.0 55.0 80.0 °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.
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