Carrier 50FC 04 Series Service And Maintenance Instructions page 43

Table 9 — Economizer Module —
Right Hand Terminal Blocks
LABEL TYPE
Top Right Terminal Blocks
AUX2 I 24 vac IN The first terminal is not used.
Shut Down (SD) or HEAT (W)
Conventional only
OCC 24 vac IN and
Heat Pump Changeover (O-B) in Heat
Pump mode.
E-GND E-GND Occupied/Unoccupied Input
EXH1 24 vac OUT Exhaust Fan 1 Output
Programmable:
Exhaust fan 2 output
or
AUX1 O 24 vac OUT
ERV
or
System alarm output
Bottom Right Terminal Blocks
Y2 in — Cooling Stage 2 Input from
Y2-I 24 vac IN
space thermostat
24 vac OUT Y2 out — Cooling Stage 2 Output to
Y2-O
stage 2 mechanical cooling
Y1 in — Cooling Stage 2 Input from
Y1-I 24 vac IN
space thermostat
Y1 out — Cooling Stage 2 Output to
Y1-O 24 vac OUT
stage 2 mechanical cooling
C COM 24 vac Common
R 24 vac 24 vac Power (hot)
S-BUS SENSOR WIRING
The labels on the sensors and controller are color coded for ease of
installation. Orange labeled sensors can only be wired to orange
terminals on the controller. Brown labeled sensors can only be
wired to S-bus (brown) terminals. Use Fig. 73 and Table 10 to lo-
cate the wiring terminals for each S-Bus sensor.
Use Fig. 73 and Table 10 to locate the wiring terminals for each
enthalpy control sensor.
S-Bus
Terminals
(1 and 2)
Fig. 73 — S-Bus Sensor DIP Switches
DESCRIPTION
DIP
Switch
Label
DIP
Switches
(3)
S-Bus
2 Pin Side
Connector
Table 10 — HH57AC081 Sensor Wiring Terminations
TERMINAL
NUMBER LABEL
1 S-BUS
2 S-BUS
Use Fig. 73 and Table 11 to set the DIP switches for the desired
use of the sensor.
Table 11 — HH57AC081 Sensor DIP Switch
DIP SWITCH POSITIONS FOR SWITCHES 1, 2, AND 3
USE
1
DA OFF
RA ON
OA OFF
NOTE: When an S-Bus sensor is connected to an existing net-
work, it will take 60 minutes for the network to recognize and
auto-configure itself to use the new sensor.
During the 60-minute setup period, no alarms for sensor failures
(except SAT) will be issued and no economizing function will be
available.
CO SENSOR WIRING
2
When using a CO sensor the black and brown common wires are
2
internally connected and only one is connected to "IAQ COM" on
the W7220. Use the power from the W7220 to power the CO
sensor OR make sure the ground for the power supplies are com-
mon. See Fig. 74 for CO
CO Sensor
24V
Analog
Out
1
Power Supply. Provide Disconnect
Means and Overload Protection
As Required.
Fig. 74 — CO
43
TYPE DESCRIPTION
S-BUS
Communications
S-BUS
(Enthalpy Control
Sensor Bus)
S-BUS
Communications
S-BUS
(Enthalpy Control
Sensor Bus)
2
ON
OFF
OFF
sensor wiring.
2
Red L1
(Hot)
Black
L2
1
Yellow
+
Brown
–
Orange
Green
Sensor Wiring
2
3
OFF
OFF
OFF
2