Honeywell RTH5100B Installation Instructions Manual page 13

Step 6. Mount New Wallplate to Wall (Cont)
3. Position the wallplate on the wall with the arrow
pointing up. Level the wallplate (for appearance
only) and mark the two mounting holes with
a pencil.
LEVEL
R
C
R
Y
NOT
USED
(O/B) W
G
WALLPLATE
M22044
PLACE LEVEL ON TABS
MARK MOUNTING
HOLES (2)
13 69-1716