26
DIP
Switch
Label
DIP
Switches
(3)
S-Bus
2 Pin Side
Connector
S-Bus
Terminals
(1 and 2)
C14178
Fig. 39 -- S--Bus Sensor DIP Switches
Table 10 – Enthalpy Control Sensor Wiring
Termina tio n s*
Ter m in a l
Type Description
Nbr Label
1 S --- B U S S --- B U S
S --- B u s C o m m u n i c a t i o n s
(Enthalpy C ontrol Sensor Bus)
2 S --- B U S S --- B U S
S --- B u s C o m m u n i c a t i o n s
(Enthalpy C ontrol Sensor Bus)
* Terminals are polarity insensitive.
Table 1 1 – Enthalpy Control Sensor DIP Switch Settings
Use
DIP Switch Positions for Switches 1, 2, and 3
1 2 3
DA * OFF ON OFF
RA
[
ON OFF OFF
OA** OFF OFF OFF
*DA=DischargeAir
[ RA = Return Air
** OA = Outside Air
NOTE: When a S--Bus sensor is connected to an existing
network, 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 t he power supplies are common. See Fig. 40 for CO
2
sensor wiring.
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
C14158
Fig. 40 -- Wiring for CO
2
Sensor
Interface Overview
This section describes how to use the economizer ’s user
interface for:
S Keypad and menu navigation
S Settings and parameter changes
S Menu structure and selection
User Interface —
The user interface consists of a 2--line LCD display and a
4--butt on keypad on t he front of the economizer cont roller.
2 LINE
LCD
MENU UP
(EXIT)
BUTTON
SCROLL
UP/DOWN
BUTTONS
SELECT
(ENTER)
BUTTON
C14206
Fig. 41 -- W7220 Controlle r
Keypad —
The four navigation buttons (see Fig. 41) are used to scroll
through the menus and menu items, select menu items,
and to change parameter and configuration settings.
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