Emerson EE542-1Z STEP 2. Mount the New Thermostat

O/B

W/E

Take care when securing and routing wires so they do not short to

adjacent terminals or rear of thermostat. Personal injury and/or

property damage may occur.

CAUTION

STEP 2. Mount the New Thermostat

1. Unpack the thermostat and separate the mounting plate from the

thermostat. Remove the packing material from the thermostat.

Gently pull the thermostat straight off of the base. Hold the back

of the thermostat by the lower corners with one hand, and pull

the wall plate off with the other hand.

Feed thermostat wires through rectangular hole between the

terminal blocks in the thermostat wall plate.

NOTE: Forcing or prying on the thermostat will cause damage to the unit.

Contents

Main Contents Introduction About this Guide System Compatibility Getting Started Required Items Required Tools Pre-Installation Checklist Quick Guide ATTENTION: MERCURY NOTICE STEP 1. Remove the Old Thermostat. 1. 2. 3. 3-Part Thermostat Thermostat Components Most thermostats consist of three basic parts. Remove the Old Thermostat Wall opening Wall plate hanging on the wires Wall opening STEP 2. Mount the New Thermostat 1. 2. Mount the new thermostat Wall plate Wall plate Wire Terminals Feed wires through this hole from back Connect wires here Connect wires as follows: 7. 9. 8 STEP 3. Configure the Thermostat 1. 2. 3. 1. HVAC Equipment Setup If the system is a single or multi-stage conventional system, your options are: Indoor Options: Outdoor Options: 2. Network Settings 3. About This Device 4. Advanced HVAC Options 4A. Cycle Rates Options for this menu item include: 4B. Compressor Lockout 4C. Comfort Alert Active Protection 4D. O/B Configuration 4E. Fast Second Stage 4F. Smart Fuel Logic STEP 4. Check Thermostat Operation Check fan operation Check the cooling system Check the heating system 3. 4. 1. 2. Check the back-up heating system STEP 5. Pair Device to a Home Area Network STEP 1 STEP 2 STEP 3 STEP 4 STEP 6 STEP 5 Connection Successful STEP 6. Verify Wireless Connectivity STEP 1 $0.08 STEP 3 STEP 2 Wiring Chart O/B G W/E W2 L WARNING Y2 Y1 RC RH C NOTE: NOTE: This product requires 24V power supply via the C terminal to operate. Wiring Table