Lennox EDA - 6 Thermostat Demand Signal

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6. thermostat demand sIGnal
Table 9. Demand Signals - Humiditrol
Operating Sequence System Demand System Response
Thermostat Demand Relative Humidity
Blower CFM
Com pr (Cool) %
System Type Step Y1 Y2 O G Status D Comments
Cooling Demand - No Dehumidication Demand
Single-stageoutdoorunit 1 ON (na) ON ON Acceptable 24 VAC High 100
Compressorandindoorblowerfollowthermostat
demand.
Two-stageoutdoorunitY1 1 ON - ON ON Acceptable 24 VAC Low 70
Two-stageoutdoorunitY2 2 ON ON ON ON Acceptable 24 VAC High 100
CoolingDemand-DehumidicationDemand
Single-stageoutdoorunit 1 ON (na) ON ON Demand 24 VAC High 100
Coolingoperationhaspriority.
Two-stageoutdoorunitY1 1 ON - ON ON Demand 24 VAC Low 70
Two-stageoutdoorunitY2 2 ON ON ON ON Demand 24 VAC High 100
NoCoolingDemand-DehumidicationDemand
Single-stageoutdoorunit 1 ON (na) ON ON Demand 0 VAC High 60-82* A Humiditrol
Humiditrolequippedsystemisallowedtooperate
andcoolroomtemperaturebelowsetpointwhen
tryingtosatisfyapersistinghumiditysetpoint(see
UserHumiditrolAdjustonPage9);itisnotallowedto
operateatallwhenoutdoortemperatureis>95ºFor
whentheindoortemperatureis<65ºF.
Two-stageoutdoorunitY2 2 ON ON ON ON Demand 0 VAC High 60-82*
NOTE: * Blower CFM speed (percentage) will vary depending on selected indoor equipment (furnace, coil blower, etc.).