Honeywell RTH3100C - System Switch Operation

RTH3100C
5
1. Turn off poweratheating/coolingsystem(orfuse/circuit-breakerpanel).
2. Remove cover and thermostat, but leave wallplate with wires attached.
Remove your old thermostat
Leavewallplateinplace.
Old thermostat
Cover
Is there a sealed tube containing mercury?
If so, see inside front cover of this manual
for proper disposal instructions.
69-1891ES-1-RTH3100C-IG.CS5.indd 5 5/17/2011 11:21:06 AM