Access the ISU (installer setup) menu by pressing the system key from the main screen then press and hold the two keys on either side of the center for approximately five seconds. Hit next until you find 0670 and then change the value to 4. http://www.forwardthinking.honeywell.com/related_links/thermostats/commercial_pro/install/62_0221.pdf On a side note, this information was insanely hard to find.
Configure Installer Setup
1. Press and release the System key. (Left key)
2. Press System and Done keys simultaneously. (Left and Right keys)
3. Hold keys for approximately five seconds, until the screen changes.
4. When the display changes, release the System and Done keys.
5. Press Next (Center key) until the number "0670" appears in the center.
6. Press Up or Down key until the number on the right is "0."
7. Press Done key (Right key).
8. Additional information: Right number sets for 0670
0-Unlocked
1-Partial Lockout
2-Partial Lockout
3-Fully Locked
Details are on the installer manual on page 10.
https://www.manualslib.com/manual/534861/Honeywell-Tb7220u-Commercialpro.html?page=1#manual
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