Economizer Operation - Fan Type = 1Speed; Standard Or Single Speed Fan Operation - Carrier 50FC Series Service And Maintenance Instructions

Standard or Single Speed Fan Operation

The W7220 controller will control a standard 1 speed unit
when configured for FAN TYPE = 1 SPEED. Refer to Table 14
for economizer operation.
DEMAND
OUTSIDE AIR
CONTROLLED
GOOD TO
VENTILATION
ECONOMIZE
(DCV)
NO
NONE
YES
NO
Below CO2 Set
YES
NO
Above CO2 Set
YES
*With stage 3 delay (STG3 DLY) in Advanced setup, COOL Y2-OUT will be turned ON after the delay time specified.
N/A = Not applicable
Table 14 — Economizer Operation - FAN TYPE = 1SPEED
INPUTS
W COOL
(HEAT ON) Y1-IN
N/A OFF
N/A ON
N/A ON
N/A OFF
N/A ON
N/A ON
N/A OFF
N/A ON
N/A ON
N/A OFF
N/A ON
N/A ON
N/A OFF
N/A ON
N/A ON
N/A OFF
N/A ON
N/A ON
FAN SPEED
COOL COOL COOL
Y2-IN Y1-OUT Y2-OUT
OFF OFF OFF
OFF ON OFF
ON ON ON
OFF OFF OFF
OFF OFF OFF
ON ON OFF*
OFF OFF OFF
OFF ON OFF
ON ON ON
OFF OFF OFF
OFF OFF OFF
ON ON OFF*
OFF OFF OFF
OFF ON OFF
ON ON ON
OFF OFF OFF
OFF OFF OFF
ON ON OFF*
49
OUTPUTS
DAMPER POSITION
(reference
OCCUPIED
only)
HIGH MIN POS
HIGH MIN POS
HIGH MIN POS
HIGH MIN POS
MIN POS to
HIGH
Full Open
MIN POS to
HIGH
Full Open
HIGH VENTMIN
HIGH VENTMIN
HIGH VENTMIN
HIGH VENTMIN
VENTMIN to
HIGH
Full Open
VENTMIN to
HIGH
Full Open
VENTMIN to
HIGH
VENTMAX
VENTMIN to
HIGH
VENTMAX
VENTMIN to
HIGH
VENTMAX
VENTMIN to
HIGH
VENTMAX
VENTMIN to
HIGH
Full Open
VENTMIN to
HIGH
Full Open
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
Closed
Closed
Closed
Closed
Closed to
Full Open
Closed to
Full Open