Carrier CRECOMZR052A00 - Page 24

Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
Catalog No. 04-53480314-01 Printed in U.S.A. Form IIK-CRECOMZR52-02 Pg 24 8-21 Replaces: IIK-CRECOMZR52-01
© 2021 Carrier
Table 6 — EconoMi$er IV Input/Output Logic
* For single enthalpy control, the module compares outdoor enthalpy to the ABCD set point.
† Power at B 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 sensor signals, between minimum position and either maximum position (DCV) or fully
open (supply-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 signal).
INPUTS OUTPUTS
Demand
Controlled
Ventilation (DCV)
Enthalpy*
Y1 Y2
Compressor N Terminal†
Outdoor Return
Stage
1
Stage
2
Occupied Unoccupied
Damper
Below set
(DCV LED Off)
High
(Free Cooling LED Off)
Low
On On On On
Minimum position ClosedOn Off On Off
Off Off Off Off
Low
(Free Cooling LED On)
High
On On On Off Modulating**
(between min. position and
full-open)
Modulating**
(between closed and full-
open)
On Off Off Off
Off Off Off Off Minimum position Closed
Above set
(DCV LED On)
High
(Free Cooling LED Off)
Low
On On On On
Modulating††
(between min. position and
DCV maximum)
Modulating††
(between closed and DCV
maximum)
On Off On Off
Off Off Off Off
Low
(Free Cooling LED On)
High
On On On Off
Modulating*** Modulating†††On Off Off O ff
Off Off Off Off