35
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. 52 and Table 6 to locate the wiring terminals for each S-
Bus sensor.
Use Fig. 52 and Table 7 to set the DIP switches for the de-
sired use of the sensor.
Fig. 52 — S-Bus Sensor DIP Switches
Table 6 — Enthalpy Control Sensor Wiring
Terminations
NOTE: Terminals are polarity insensitive.
Table 7 — Enthalpy Control Sensor
DIP Switch Settings
LEGEND
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
2
Sensor Wiring
When using a CO
2
sensor the black and brown common
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
2
sensor OR make sure the ground for the
power supplies are common. See Fig. 53 for CO
2
sensor
wiring.
Fig. 53 — CO
2
Sensor Wiring
INTERFACE OVERVIEW
This section describes how to use the EconoMi$er
®
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
Use the four navigation buttons (see Fig. 54) to scroll
through the menus and menu items, select menu items, and to
change parameter and configuration settings.
To use the keypad when working with menus:
• Press the ▲ (Up arrow) button to move to the previous
menu.
• Press the ▼ (Down arrow) button to move to the next
menu.
• Press the (Enter) button to display the first item in
the currently displayed menu.
• Press the (Menu Up/Exit) button to exit a menu’s item
and return to the list of menus.
Fig. 54 — W7220 Controller
TERMINAL
TYPE DESCRIPTION
NUMBER LABEL
1S-BUSS-BUS
S-BUS
Communications
(Enthalpy Control
Sensor Bus)
2S-BUSS-BUS
S-BUS
Communications
(Enthalpy Control
Sensor Bus)
USE
DIP SWITCH POSITIONS FOR SWITCHES 1, 2, AND 3
123
DA OFF ON OFF
RA ON OFF OFF
OA OFF OFF OFF
DA — Discharge Air
OA — Return Air
RA — Outside Air
DIP
SWITCH
LABEL
DIP
SWITCHES
(3)
S-BUS
2 PIN SIDE
CONNECTOR
S-BUS
TERMINALS
(1 AND 2)
CO
2
SENSOR
24V
ANALOG
OUT
L1
(HOT)
L2
RED
BLACK
YELLOW
BROWN
ORANGE
GREEN
+
–
POWER SUPPLY. PROVIDE DISCONNECT
MEANS AND OVERLOAD PROTECTION
AS REQUIRED.
1
1
2 LINE
LCD
MENU UP
(EXIT)
BUTTON
SCROLL
UP/DOWN
BUTTONS
SELECT
(ENTER)
BUTTON
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