Carrier 50FC 04 Series Service And Maintenance Instructions page 44

INTERFACE OVERVIEW
This section describes how to use the EconoMi$er
interface for:
• Keypad and menu navigation
• Settings and parameter changes
• Menu structure and selection
User Interface
The user interface consists of a 2-line LCD display and a 4-button
keypad on the front of the economizer controller.
Keypad
Use the four navigation buttons (see Fig. 75) to scroll through the
menus and menu items, select menu items, and to change parame-
ter and configuration settings.
To use the keypad when working with menus:
• Press the ▲ (Up arrow) button to move to the previous
menu.
• Press the ▼ (Down arrow) button to move to the next
menu.
• Press the (Enter) button to display the first item in the
currently displayed menu.
• Press the (Menu Up/Exit) button to exit a menu's item
and return to the list of menus.
Menu Up
Scroll
(Exit)
Up/Down
Button
Buttons
Fig. 75 — W7220 Controller Navigation Buttons
To use the keypad when working with Setpoints, System and Ad-
vanced Settings, Checkout tests and Alarms:
1. Navigate to the desired menu.
2. Press the (Enter) button to display the first item in the
currently displayed menu.
3. Use the ▲ and ▼ buttons to scroll to the desired
parameter.
4. Press the (Enter) button to display the value of the
currently displayed item.
5. Press the ▲ button to increase (change) the displayed
parameter value.
6. Press the ▼ button to decrease (change) the displayed
parameter value.
NOTE: When values are displayed, pressing and holding the ▲or
▼ button causes the display to automatically increment or
X user
®
decrement.
7.
8.
9.
Menu Structure
Table 12 illustrates the complete hierarchy of menus and parame-
ters for the EconoMi$er
The Menus in display order are:
•
•
•
•
•
•
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 locat-
ed after the cooling coil, in the fan section, where it is designated
as (Cooling) Supply Air Temperature or SAT sensor.
Setup and Configuration
Before being placed into service, the W7220 Economizer module
must be set up and configured for the installed system.
.
2 Line
LCD
IMPORTANT: During setup, the economizer module is live at
all times.
The setup process uses a hierarchical menu structure that is easy to
use. Press the ▲ and ▼ arrow buttons to move forward and back-
ward through the menus and press the button to select and confirm
setup item changes.
Select
Time-Out and Screensaver
(Enter)
Button
When no buttons have been pressed for 10 minutes, the LCD dis-
plays a screen saver, which cycles through the Status items. Each
Status items displays in turn and cycles to the next item after
5 seconds.
44
Press the (Enter) button to accept the displayed value
and store it in nonvolatile RAM. "CHANGE STORED"
displays.
Press the (Enter) button to return to the current menu
parameter.
Press the (Menu Up/Exit) button to return to the
previous menu.
® X system.
STATUS
SETPOINTS
SYSTEM SETUP
ADVANCED SETUP
CHECKOUT
ALARMS