Honeywell RTHL3550 User Manual

5
5 Mount Wallplate
Mount the new wallplate using the included screws and anchors.
Drill 3/16-in. holes for drywall
Drill 3/32-in. holes for plaster
M28345
Remove metal
jumper if you
have both R and
Rc wires.
MCR31270A
W2 G
G
W
W
Y
Y
R
R
RcY2
We are here to help. Call 1-800-468-1502 for wiring assistance.
6 Connect Wires
Simply match wire labels.
If labels do not match letters on the thermostat, check “Alternate Wiring
(Conventional Systems)” on page 6 and connect to terminal as shown (see
notes, below).

Honeywell RTHL3550 Specifications

General

Brand	Honeywell
Model	RTHL3550
Category	Thermostat
Language	English