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IMPORTANT: Table 7 illustrates the complete hierarchy.
Your menu parameters may be different depending on
your configuration.
For example, if you do not have a DCV (CO
none of the DCV parameters appear and only MIN POS will
display. If you have a CO
MAX will appear AND if you have 2 speed fan DCV MIN
(high and low speed) and DCV MAX (high and low speed
will appear).
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.
) sensor, then
2
sensor, the DCV MIN and DCV
2
SETUP AND CONFIGURATION
Before being placed into service, the W7220 economizer module
must be setup and configured for the installed system.
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.
TIME-OUT AND SCREENSAVER
When no buttons have been pressed for 10 minutes, the LCD
displays a screen saver, which cycles through the Status items.
Each Status items displays in turn and cycles to the next item after
5 seconds.
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