Carrier 50HCQ12 Installation Instructions Manual page 40

Table 20 — Enthalpy Operation, No Demand Controlled Ventilation (DCV) (CO
OUTSIDE AIR
DCV GOOD TO
ECONOMIZE?
No
None
Yes
*With 2SP FAN DELAY (Advanced Setup Menu) when in the economizing
mode there is a delay for the high speed fan to try to satisfy the call for
second stage cooling by turning on the fan to high and opening the OA
damper 100% before the first stage mechanical cooling is enabled.
Table 21 — Enthalpy Operation, with Demand Controlled Ventilation (DCV) (CO
OUTSIDE AIR
DCV GOOD TO
ECONOMIZE?
No
Below Set
Yes
No
Above Set
Yes
*With 2SP FAN DELAY (Advanced Setup Menu) when in the economizing
mode there is a delay for the high speed fan to try to satisfy the call for
second stage cooling by turning on the fan to high and opening the OA
damper 100% before the first stage mechanical cooling is enabled.
Y1-I Y2-I FAN SPEED
Off Off Low
On Off Low
On On High
Off Off Low
On Off Low
On On High
Y1-I Y2-I FAN SPEED
Off Off Low
On Off Low
On On High
Off Off Low
On Off Low
On On High
Off Off Low
On Off Low
On On High
Off Off Low
On Off Low
On On High
Y1-O Y2-O
0-v/Off 0-v/Off MIN POS L
24-v/On 0-v/Off MIN POS L
24-v/On 24-v/On MIN POS H
0-v/Off 0-v/Off MIN POS L
0-v/Off 0-v/Off MIN POS L to Full-Open
DELAY*
0-v/Off MIN POS H to Full-Open
†
24-v/On
With stage 3 delay (STG3 DLY) in Advanced setup menu, second stage
†
of mechanical cooling Y2-O can be turned on after the delay if the calls for
Y1-I and Y2-I have not been satisfied.
Y1-O Y2-O
0-v/Off 0-v/Off VENTMIN L
24-v/On 0-v/Off VENTMIN L
24-v/On 24-v/On VENTMIN H
0-v/Off 0-v/Off VENTMIN L
0-v/Off 0-v/Off VENTMIN L to Full-Open
24-v/On 0-v/Off VENTMIN H to Full-Open
†
0-v/Off 0-v/Off VENTMIN L to VENTMAX
24-v/On 0-v/Off VENTMIN L to VENTMAX
24-v/On 24-v/On VENTMIN H to VENTMAX
0-v/Off 0-v/Off VENTMIN L to VENTMAX
0-v/Off 0-v/Off VENTMIN L to Full-Open
DELAY*
0-v/Off † VENTMIN H to Full-Open
24-v/On
With stage 3 delay (STG3 DLY) in Advanced setup menu, second stage
†
of mechanical cooling Y2-O can be turned on after the delay if the calls for
Y1-I and Y2-I have not been satisfied.
40
Sensor) — 2 Speed Fan
2
OCCUPIED UNOCCUPIED
Closed
Closed
Closed
Closed
Closed to Full-Open
Closed to Full-Open
Sensor) — 2 Speed Fan
2
OCCUPIED UNOCCUPIED
Closed
Closed
Closed
Closed
Closed to Full-Open
Closed to Full-Open
Closed
Closed
Closed
Closed
Closed to Full-Open
Closed to Full-Open