Bryant 549B User Manual
Page 11
—
11
—
WIRE
CONNECTIONS
TO
LOW-VOLTAGE
SECTION
(CONNECTION
BOARD)
COOL STAGE 1
FAN
HEAT STAGE 1
COOL STAGE 2
HEAT STAGE 2
24 VAC HOT
24 VAC COM
N/A
OUTDOOR AIR
SENSOR
Y1/W2
G
W/W1
Y/Y2
O/W2
R
C
S1
S2
THERMOSTAT DIPSWITCH SETTINGS
R
G
Y1
Y2
W1
W2
C
IPD/X
ON
OFF
A
B
C
D
COMPRESSOR
NO. 2
DISCONNECT
BOARD
DISCONNECT
SWITCH
(OPTIONAL)
RACEWAY
HOLE IN
END
PANEL
COMPRESSOR NO. 1
CONVENIENCE
OUTLET
LEGEND
NOTE: Underlined letter indicates active thermostat output when con-
figured for A/C operation.
Fig. 7 — Low-Voltage Connections With or
Without Economizer or Two-Position Damper
Field Wiring
Fig. 8 — Typical Field Control Wiring Raceway
Fig. 9 — Defrost Board
SCREWS
(SIDE)
MANUAL
OUTDOOR-AIR
ADJUSTMENT
SCREWS
DAMPER
BLADE
FILTER
ACCESS
PANEL
OUTDOOR AIR
OPENING
PANEL
Fig. 10 — Damper Panel with Manual
Outdoor-Air Damper Installed