Carrier WeatherMaster 50HC14 Installation Instructions Manual page 27

Table 5 — 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
Y2 out - Cooling Stage 2 Output to
Y2-O 24 vac OUT
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. 50 and Table 6 to locate the wiring terminals for each S-
Bus sensor.
Use Fig. 50 and Table 6 to locate the wiring terminals for
each enthalpy control sensor.
S-BUS
TERMINALS
(1 AND 2)
Fig. 50 — S-Bus Sensor DIP Switches
DESCRIPTION
DIP
SWITCH
LABEL
DIP
SWITCHES
(3)
S-BUS
2 PIN SIDE
CONNECTOR
Table 6 — HH57AC081 Sensor Wiring Terminations
TERMINAL
NUMBER LABEL
1 S-BUS
2 S-BUS
Use Fig. 50 and Table 7 to set the DIP switches for the de-
sired use of the sensor.
Table 7 — HH57AC081 Sensor DIP Switch
DIP SWITCH POSITIONS FOR SWITCHES 1, 2, AND 3
USE
1
DA OFF
RA ON
OA OFF
NOTE: When a 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
wires are 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
2
supplies are common. See Fig. 51 for CO
CO SENSOR
2
24V
ANALOG
OUT
1
POWER SUPPLY. PROVIDE DISCONNECT
MEANS AND OVERLOAD PROTECTION
AS REQUIRED.
Fig. 51 — CO
INTERFACE OVERVIEW
This section describes how to use the Economizer's user
interface for:
• Keypad and menu navigation
• Settings and parameter changes
• Menu structure and selection
USER INTERFACE
The user interface consists of a 2-line LCD display and a
4-button keypad on the front of the economizer controller.
KEYPAD
The four navigation buttons (see Fig. 52) are used to scroll
through the menus and menu items, select menu items, and to
change parameter and configuration settings.
27
TYPE DESCRIPTION
Communications
S-BUS
(Enthalpy Control
Sensor Bus)
Communications
S-BUS
(Enthalpy Control
Sensor Bus)
2
ON
OFF
OFF
sensor, the black and brown common
2
sensor wiring.
2
RED L1
(HOT)
BLACK
L2
1
YELLOW
+
BROWN
–
ORANGE
GREEN
Sensor Wiring
2
S-BUS
S-BUS
3
OFF
OFF
OFF