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Additional control capabilities include automatic detection of
new sensors and detection of sensor failure or loss of
communication.
The W7220 control module includes an integral user
interface with keypad and LCD display that permits direct
input of setpoint values and configurations and display of
status and alarms.
The W7220 controller is located in the RTU base unit's
Control Box. See the Installation Instructions for this base
unit for the location of the Control Box access panel.
User Interface
The user interface consists of a 2- - line LCD display and a
4- - button keypad on the front of the economizer controller.
MENU UP
SCROLL
(EXIT)
UP/DOWN
BUTTON
BUTTONS
Fig. 2 - - W7220 Controller
Keypad
The four navigation buttons (see Fig. 2) are used to scroll
through the menus and menu items, select menu items,
and to change parameter and configuration settings.
Using the Keypad with Menus
To use the keypad when working with menus:
S Press the
(Up arrow) button to move to the previous
menu.
S Press the
(Down arrow) button to move to the next
menu.
S Press the
(Enter) button to display the first item in
the currently displayed menu.
S Press the
(Menu Up/Exit) button to exit a menu's
item and return to the list of menus.
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SELECT
(ENTER)
BUTTON
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The Menus in display order are:
S STATUS
S SETPOINTS
S SYSTEM SETUP
S ADVANCED SETUP
S CHECKOUT
S ALARMS
Using the Keypad with Settings and Parameters
To use the keypad when working with Setpoints, System
and Advanced Settings, Checkout tests and Alarms:
1. Navigate to the desired menu.
2. Press the
the currently displayed menu.
3. Use the
parameter.
4. Press the
currently displayed item.
2 LINE
5. Press the
LCD
parameter value.
6. Press the
parameter value.
NOTE: When values are displayed, pressing and
holding the
display to automatically increment.
7. Press the
value and store it in nonvolatile RAM.
8. "CHANGE STORED" displays.
C11548
9. Press the
menu parameter.
10. Press the
previous menu.
Menu Structure
IMPORTANT: Table 2 illustrates the complete hierarchy.
Your menu parameters may be different depending on your
configuration. For example if you do not have a DCV (CO
sensor, then none of the DCV parameters appear.
The menu hierarchy has been modified to reflect controller
configuration for 2- - speed indoor fan application in the
Staged Air Volume option.
NOTE: Some parameters in the menus use the letters MA
or MAT, indicating a mixed air temperature sensor
location before the cooling coil. This unit application has
the control sensor located after the cooling coil, in the fan
section, where it is designated as (Cooling) Supply Air
Temperature or SAT sensor.
4
(Enter) button to display the first item in
and
buttons to scroll to the desired
(Enter) button to display the value of the
button to increase (change) the displayed
button to decrease (change) the displayed
or
button causes the
(Enter) button to accept the displayed
(Enter) button to return to the current
(Menu Up/Exit) button to return to the
)
2
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