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Table 30 -- EconoMi$erlV Input/Output Logic
Demand Control
Ventilation (DCV)
Below set
(DCV LED Off)
Above set
(DCV LED On)
INPUTS
Enthalpy* Compressor
Outdoor Return Y1 Y2 Stage Stage
1 2
High Low On On On On
(Free Cooling LED Off) On Off On Off
Off Off Off Off
Low High On On On Off
(Free Cooling LED On) On Off Off Off
Off Off Off Off
High Low On On On On
(Free Cooling LED Off) On Off On Off
Off Off Off Off
Low High On On On Off
(Free Cooling LED On) On Off Off Off
Off Off Off Off
*For single enthalpy control, the module compares
enthalpy to the ABCD set point.
tPower at N terminal determines Occupied/Unoccupied
24 vac (Occupied), no power (Unoccupied).
**Modulation is based on the supply air sensor signal.
1-tModulation is based on the DCV signal.
OUTPUTS
N Terminalt
Occupied
Minimum position
Modulating** (between rain.
position and full-open)
Minimum position
Modulating1-1- (between min.
position and DCV maximum)
Modulating***
Unoccupied
Dam )er
Closed
Modulating** (between
closed and full-open)
Closed
Modulatingtl- (between
closed and DCV
maximum)
Modulatingtl-t
outdoor
setting:
***Modulation is based on the greater of DCV and supply air sensor
signals, between minimum position and either maximum position
(DCV) or fully open (supply air signal).
ttl-Modulation is based on the greater of DCV and supply air sen-
sor signals, between closed and either maximum position (DCV)
or fully open (supply air signal).
Fig. 61 -- EconoMiSerlV Functional View
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