Honeywell Design and Application Technical Reference Manual page 143

Section 11 - W7220 JADE™ Economizer Module
If you are not sure the com port on your computer you can check the com port by pressing the
Window key and the Pause key at the same time on your keyboard.
With a laptop you may need to press and hold the Fn key, then press and hold the windows key
and then press and hold the pause key.
137 Honeywell Economizers 63-8594-02