Bryant 581B036--072 Installation Instructions Manual page 59

INPUTS
Demand Control Demand Control
Ventilation (DCV) V til ti (DCV)
Below set Below set High High
(DCV LED Off) (DCV LED Off) (Free Cooling LED Off) (F C
Low Low
(Free Cooling LED On) (F C
Above set Above set High High
(DCV LED O ) (DCV LED On) (F (Free Cooling LED Off) C
Low Low
(Free Cooling LED On) (F C
*For single enthalpy control, the module compares outdoor enthalpy to the ABCD set point.
†Power at N terminal determines Occupied/Unoccupied setting:
**Modulation is based on the supply-air sensor signal.
††Modulation is based on the DCV signal.
***Modulation is based on the greater of DCV and supply-air sensor signals, between minimum position and either maximum position (DCV) or fully open (sup-
ply-air signal).
†††Modulation is based on the greater of DCV and supply-air sensor signals, between closed and either maximum position (DCV) or fully open (supply-air sig-
nal).
Table 44—EconoMi$er IV Input/Output Logic
Enthalpy*
Y1 Y1
Outdoor Outdoor Return Return
On On
Low Low
li LED Off)
On Off
Off Off
On On
High High
li LED O )
On Off
Off Off
On On
Low Low
li LED Off)
On Off
Off Off
On On
High High
li LED O )
On Off
Off Off
24 vac (Occupied), no power (Unoccupied).
Fig. 67 --- EconoMi$er IV Functional View
Compressor
Stage Stage
Occupied
Y2 Y2
1 2
On On
Minimum position Minimum position
On Off
Off Off
On Off
Modulating** (between min. Modulating
position and full-open) i i
Off Off
Off Off Minimum position
On On
Modulating†† (between min. Modulating†† (between min.
position and DCV maximum) i i
On Off
Off Off
On Off
Modulating Modulating***
Off Off
Off Off
59
OUTPUTS
N Terminal†
Unoccupied
Damper
Closed Closed
(between min. Modulating Modulating** (between
d f ll ) closed and full-open) l d d f ll
Closed
Modulating†† (between Modulating†† (between
d DCV i ) closed and DCV l d d DCV
maximum) maximum)
Modulating††† Modulating†††
(between
)
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