Honeywell CT3550 STEP 1. PREPARE FOR INSTALLATION

5 69-1284—2

STEP 1. PREPARE FOR INSTALLATION

❑Check Table 1, the compatibilit

y

chart, to make sure the thermostat is compatible with

y

our s

y

stem. If

y

our s

y

stem

is not compatible, call Hone

y

well Customer Relations Center, toll-free, 1-800-468-1502.

Table 1. Compatibility Chart.

aCompatible with 2-wire Hone

y

well and Taco zone valves. Not compatible with 3-wire zone valves or 2-wire White

Rod

g

ers no. 1361 zone valves.

bNot compatible with an

y

120/240 volt s

y

stem.

Package Contents.

•Thermostat •Wallplate

•Screws and anchors •Wirin

g

labels

•3 Ener

g

izer® AA batteries •Owners manual

Tools Required

•Screwdriver

•Drill

System Type Compatibility with CT3550

Gas — Standin

g

Pilot Yes

Gas — Electronic I

g

nition Yes

Gas-fired Boilers Yesa

Gas — 750 Millivolt Heat Yes

Oil-Fired Boilers Ye sa

Oil-Fired Furnace Yes

Electric Furnace Yes

Electric Air Conditionin

g

Yes

Baseboard Electric (120/240 line volt)bNo

Sin

g

le Sta

g

e Heat Pump Yes

Multista

g

e Heat Pumps/Multista

g

e Equipment No

Contents

Main OWNERS GUIDE Honeywell CT3550 PROGRAMMABLE THERMOSTAT Table of Contents Total comfort temperature management with Smart Response Technology. MERCURY NOTICE TYPICAL LOCATION OF A MERCURY SWITCH IN A THERMOSTAT Page AM STEP 1. PREPARE FOR INSTALLATION Package Contents. Tools Required STEP 2. REMOVE OLD THERMOSTAT Special Installations Replacing a Clock Thermostat that has C or C1 Clock Terminals Replacing a Thermostat that has Six or More Wires Replacing a Thermostat that has Three Wires STEP 3. MOUNT THERMOSTAT WALLPLATE STEP 4. WIRE WALLPLATE TERMINALS R W Y G STEP 5. INSTALL THE BATTERIES STEP 6. MOUNT THE THERMOSTAT STEP 7. CUSTOMIZE YOUR THERMOSTAT Fan Operation (Feature Number 2) System Type (Feature Number 4) Smart Response Technology (Feature Number 13) Temperature Format (Feature Number 14) Time Format (Feature Number 16) Factory Set Function (Feature Number 37) STEP 8. SET THE CLOCK Set Current Day and Time STEP 9. PROGRAMMING Program Weekdays Program Saturday and Sunday Clear a Program Period STEP 10. OPERATING YOUR THERMOSTAT Change Temperature Setting Until the Next Program Period (Temporary Change) Change Temperature Setting Indefinitely (Hold) Change the Temperature Setting Until a Designated Day and Period (Vacation Hold) STEP 11. SET THE FAN AND SYSTEM KEY Set the Fan Key Set the System Key If You Have a Problem Toll-Free Customer Assistance SMART RESPONSE TECHNOLOGY WIRING DIAGRAMS 2-WIRE HEAT-ONLY (JUMPER INTACT) 4-WIRE HEAT/COOL (JUMPER INTACT) 3-WIRE HEAT ONLY WITH FAN (JUMPER INTACT) 4-WIRE SINGLE-STAGE HEAT PUMP (JUMPER INTACT) Notice: This thermostat is a Class B di g ital apparatus that complies with Canadian Radio Interference Re g Limited One-Year Warranty