Owner's Manual
Page 3
Table of contents Getting started Installation tips 2 Pre-installation checklist 3 Old thermostat removal Remove old thermostat 5 Identify and label wires 6 New thermostat installation Wallplate mounting 8 Wire connections 11 Battery installation 13 Thermostat mounting 14 RTH3100C System setup How to change settings 15 Set auxiliary heat cycle rate 16 Set emergency heat cycle rate 17 Set temperature display 18 Appendices In case of difficulty 19 Customer assistance 21 Accessories 21 1-year limited warranty 22
Table of contents Getting started Installation tips 2 Pre-installation checklist 3 Old thermostat removal Remove old thermostat 5 Identify and label wires 6 New thermostat installation Wallplate mounting 8 Wire connections 11 Battery installation 13 Thermostat mounting 14 RTH3100C System setup How to change settings 15 Set auxiliary heat cycle rate 16 Set emergency heat cycle rate 17 Set temperature display 18 Appendices In case of difficulty 19 Customer assistance 21 Accessories 21 1-year limited warranty 22
Owner's Manual
Page 4
Just follow the simple, step-by-step instructions in three simple steps • Label wires and remove your old thermostat (see pages 5-7). • Install and wire your new thermostat (see pages 8-14). • Set your new thermostat to go before ! Install in the following pages. Installation tips • Have everything you begin (see pages 3-4). • Do...
Just follow the simple, step-by-step instructions in three simple steps • Label wires and remove your old thermostat (see pages 5-7). • Install and wire your new thermostat (see pages 8-14). • Set your new thermostat to go before ! Install in the following pages. Installation tips • Have everything you begin (see pages 3-4). • Do...
Owner's Manual
Page 5
APrbeo-uintsytoaullratnieown cthercmkloissttat Check to make sure your package includes the following items: RTH3100C RTH3100C thermostat (wallplate attached to back) Operating Manual Wall anchors and mounting screws (2 each) Wire Labels
APrbeo-uintsytoaullratnieown cthercmkloissttat Check to make sure your package includes the following items: RTH3100C RTH3100C thermostat (wallplate attached to back) Operating Manual Wall anchors and mounting screws (2 each) Wire Labels
Owner's Manual
Page 7
If so, see inside front cover of this manual for proper disposal instructions. Remove cover and thermostat, but leave wallplate with wires attached. Old thermostat Cover Turn off power at heating/cooling system (or fuse/circuit-breaker panel). 2. Remove your old thermostat 1. Is there a sealed tube containing mercury? RTH3100C Leave wallplate in place.
If so, see inside front cover of this manual for proper disposal instructions. Remove cover and thermostat, but leave wallplate with wires attached. Old thermostat Cover Turn off power at heating/cooling system (or fuse/circuit-breaker panel). 2. Remove your old thermostat 1. Is there a sealed tube containing mercury? RTH3100C Leave wallplate in place.
Owner's Manual
Page 8
Do not use If any wires are not attached to terminals in your old thermostat, do not connect them to your new thermostat. Wrap the bare metal ends of each unused wire with electrical tape, so it cannot touch and short out other wires. Installation Guide Identify wires you will not use unconnected wires.
Do not use If any wires are not attached to terminals in your old thermostat, do not connect them to your new thermostat. Wrap the bare metal ends of each unused wire with electrical tape, so it cannot touch and short out other wires. Installation Guide Identify wires you will not use unconnected wires.
Owner's Manual
Page 9
RTH3100C Label wires and remove old wallplate Use a screwdriver to identify wire types. Aux O Do not let wires fall into wall opening . Wrap supplied labels securely around each wire, wrap it with the label matching the letter on your old thermostat. (Adhesive labels are supplied in your thermostat package.) Remove the old wallplate only after all wires are labeled. E IGNORE WIRE COLORS: Use only letter designations to disconnect wires one by one. Be careful not to let loose wires fall into the wall opening ! As you disconnect each wire.
RTH3100C Label wires and remove old wallplate Use a screwdriver to identify wire types. Aux O Do not let wires fall into wall opening . Wrap supplied labels securely around each wire, wrap it with the label matching the letter on your old thermostat. (Adhesive labels are supplied in your thermostat package.) Remove the old wallplate only after all wires are labeled. E IGNORE WIRE COLORS: Use only letter designations to disconnect wires one by one. Be careful not to let loose wires fall into the wall opening ! As you disconnect each wire.
Owner's Manual
Page 13
If labels do not match letters on terminal. 2. Match each labeled wire with same letter on thermostat, see next page. 11 RTH3100C Use a screwdriver to loosen screw terminals, insert wires, then tighten screws. 3. Push any excess wire back into the wall opening. Labels don't match? Connect wires (typical installation) 1.
If labels do not match letters on terminal. 2. Match each labeled wire with same letter on thermostat, see next page. 11 RTH3100C Use a screwdriver to loosen screw terminals, insert wires, then tighten screws. 3. Push any excess wire back into the wall opening. Labels don't match? Connect wires (typical installation) 1.
Owner's Manual
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...contractor for help . E Aux Y G O If no wire matches the E terminal on the new thermostat, use a small piece of wire to the C terminal. If the old thermostat had W1, W2 and Y wires, contact a heating/ cooling contractor for help . If another wire is attached to the C terminal, call 1-800-468-...W1 M W2 If the old thermostat had both O and B wires, attach the B wire to connect terminals E and Aux. 1 2 2 LR B C or or or or FV H B VR X LRBC 12 Installation Guide Connect wires (less common wire designations) If labels do not match thermostat letters, check the chart at ...
...contractor for help . E Aux Y G O If no wire matches the E terminal on the new thermostat, use a small piece of wire to the C terminal. If the old thermostat had W1, W2 and Y wires, contact a heating/ cooling contractor for help . If another wire is attached to the C terminal, call 1-800-468-...W1 M W2 If the old thermostat had both O and B wires, attach the B wire to connect terminals E and Aux. 1 2 2 LR B C or or or or FV H B VR X LRBC 12 Installation Guide Connect wires (less common wire designations) If labels do not match thermostat letters, check the chart at ...
Owner's Manual
Page 16
TIP: If wires interfere when you try to mount the thermostat, push excess wire back into place. 2. Wallplate Thermostat 14 Align the 4 tabs on the wallplate with corresponding slots on the back of the thermostat, then push gently until the thermostat snaps into the wall opening. Installation Guide Mount thermostat and restore electrical power 1. Restore electrical power at the heating/cooling system, or at the fuse/circuit-breaker panel.
TIP: If wires interfere when you try to mount the thermostat, push excess wire back into place. 2. Wallplate Thermostat 14 Align the 4 tabs on the wallplate with corresponding slots on the back of the thermostat, then push gently until the thermostat snaps into the wall opening. Installation Guide Mount thermostat and restore electrical power 1. Restore electrical power at the heating/cooling system, or at the fuse/circuit-breaker panel.