Honeywell CT3550 Manual

A SERVICE OF

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69-1284—210

❑ If the thermostat is alread

y

mounted on the wall, remove the thermostat

b

y

placin

g

y

our thumb between the thermostat and wallplate and

pullin

g

the thermostat up and awa

y

as shown.

When the batteries are runnin

g

low, a REPL BAT messa

g

e flashes for one

to two months before the batteries run out completel

y

. Replace the

batteries as soon as possible once the messa

g

e flashes.

IMPORTANT

Although the thermostat has a low battery indicator, replace the

batteries once per year to prevent leakage and to prevent the

thermostat and heating/cooling system from shutting down due

to lack of battery power in the thermostat.

If

y

ou insert new batteries within 20 to 30 seconds of removin

g

the old

batteries, the s

y

stem retains the current time and da

y

. If the displa

y

is

blank, the batteries are dead or installed incorrectl

y

. You must reset the time and da

y

. Refer to Set the Clock for

instructions.

As a precaution when leavin

g

home for lon

g

er than a month, chan

g

e batteries before leavin

g

to prevent

the s

y

stem from shuttin

g

down due to lack of power. Alwa

y

s use fresh alkaline batteries. Nonalkaline

batteries do not last as lon

g

. The

y

also can leak, causin

g

dama

g

e to the thermostat and the wall surface.

Hone

y

well recommends Ener

g

izer® batteries.

STEP 6. MOUNT THE THERMOSTAT

M16424

8

0

90

70

60

90

80

70

60

M12703

B.

PRESS LOWER

EDGE OF CASE

TO LATCH.

A. ENGAGE TABS AT TOP

OF THERMOSTAT

AND WALLPLATE.