Справочник Пользователя для Carrier 50TFQ008-012
53
Table 29 — EconoMi$er IV Input/Output Logic
*For single enthalpy control, the module compares outdoor
enthalpy to the ABCD set point.
†Power at N terminal determines Occupied/Unoccupied setting:
24 vac (Occupied), no power (Unoccupied).
**Modulation is based on the supply-air sensor signal.
††Modulation is based on the DCV signal.
***Modulation is based on the greater of DCV and supply-air sen-
sor signals, between minimum position and either maximum
position (DCV) or fully open (supply-air signal).
position (DCV) or fully open (supply-air signal).
†††Modulation is based on the greater of DCV and supply-air sen-
sor signals, between closed and either maximum position (DCV)
or fully open (supply-air signal).
or fully open (supply-air signal).
INPUTS
OUTPUTS
Demand Control
Ventilation (DCV)
Enthalpy*
Y1
Y2
Compressor
N Terminal†
Outdoor
Return
Stage
1
Stage
2
Occupied
Unoccupied
Damper
Below set
(DCV LED Off)
(DCV LED Off)
High
(Free Cooling LED Off)
(Free Cooling LED Off)
Low
On
On
On
On
Minimum position
Closed
On
Off
On
Off
Off
Off
Off
Off
Low
(Free Cooling LED On)
(Free Cooling LED On)
High
On
On
On
Off
Modulating** (between min.
position and full-open)
position and full-open)
Modulating** (between
closed and full-open)
closed and full-open)
On
Off
Off
Off
Off
Off
Off
Off
Minimum position
Closed
Above set
(DCV LED On)
(DCV LED On)
High
(Free Cooling LED Off)
(Free Cooling LED Off)
Low
On
On
On
On
Modulating†† (between min.
position and DCV maximum)
position and DCV maximum)
Modulating†† (between
closed and DCV
maximum)
closed and DCV
maximum)
On
Off
On
Off
Off
Off
Off
Off
Low
(Free Cooling LED On)
(Free Cooling LED On)
High
On
On
On
Off
Modulating***
Modulating†††
On
Off
Off
Off
Off
Off
Off
Off
Fig. 51 — EconoMi$er IV Functional View