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Emerson EE542-1Z Wall plate, Wire Terminals, Feed wires through this hole from back Connect wires here

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O/B

G

W/E

W2

L

Y2

Y1

RC

RH

C

C

7

3.

Once you have established the desired location of the thermostat,

use a pencil, and the wall plate as a template, to mark the

location of the mounting holes on your wall.

4.

Move wall plate out of the way and drill two holes using a

3/16" drill bit.

5.

Feed the thermostat wires through the rectangular hole and

fasten wall plate loosely to wall using two mounting screws in

mounting holes.

If desired, place a level against bottom of the wall plate and

adjust until level before tightening screws (leveling is for

appearance only and does not affect thermostat operation).

If you are using existing mounting holes, or if holes drilled are

too large and do not allow you to tighten base snugly, use

plastic wall anchors included with the product.

6.

Connect wires to the thermostat wall plate. The image below

shows the location of the wire terminals. Each terminal is

labeled with a letter or letter number combination.

Wall plateWireTerminalsFeed wires throughthis hole from back Connectwires here

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