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69-1012

Table of Contents

Step 1: Prepare For Installation ..................................................................................................... 4

Step 2: Remove Old Thermostat ................................................................................................... 6

Step 3: Install Batteries .................................................................................................................. 8

Step 4: Program Thermostat........................................................................................................ 10

Personal Programming Chart ...................................................................................................... 12

Step 5: Adjust Fan Operation Switch, as Required ................................................................... 18

Step 6: Adjust System On-Time,

°F/C°, as Required ................................................................. 18

Step 7: Mount Thermostat Mounting Plate ................................................................................. 21

Step 8: Wire Thermostat Terminals ............................................................................................. 23

Step 9: Mount Thermostat............................................................................................................ 27

Step 10: Check Thermostat Operation After Programming and Installing .............................. 28

Step 11: Set Fan and System Switches ..................................................................................... 30

Troubleshooting Guide................................................................................................................. 32

Limited One-Year Warranty ................................................................................. Inside Back Cover

Honeywell MAGICSTAT 3355 User Manual

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