Emerson P210 User Manual

Single-Stage Thermostat

with scheduling

Install Guide

Want to install the easy way?

Model # P210
Made in China

37-7578

2

WARNING

!

GUIDE CONTENTS

Preparations ................................................. 3

Thermostat details ........................................ 4

Removal of your old thermostat.................... 5

Mounting and wiring your new thermostat .. 10

Checking thermostat operation................... 12

Programming your thermostat .................... 16

Specifications ............................................. 33

Troubleshooting .......................................... 35

Failure to follow and read all instructions carefully before installing or operating this control could cause personal injury
and/or property damage.

1. PREPARATIONS

1.1 Check package contents

This package should contain the following items:

• Thermostat

• Mounting screws and wall anchors (x2)

• 2 AAA batteries

• Terminal wire label stickers

• Installation instructions

1.2 Gather tools

Required tools:

□ Flat-head Screwdriver □ Small pliers (needle-nose) □ Drill with 3/16” (4 mm) bit

Optional tools:

□ Wire cutters/stripper □ Hammer

3

2. THERMOSTAT DETAILS

1

1

2

1

2

3

1

2

3

4

1

2

3

4

5

1

2

3

4

5

6

1

2

3

4

5

6

7

1

1

2

1

2

3

1

2

3

4

1

2

3

4

5

1

2

3

4

5

6

1

2

3

4

5

6

7

The thermostat buttons and switches

1

Raises temperature setting.

2

Lowers temperature setting.

3

TIME button.

4

PRGM (program) button.

5

RUN (run program) button.

6

HOLD temperature button.

7

FAN switch (ON, AUTO).

8

SYSTEM switch

(COOL, OFF, HEAT).

4

Time Prgm Run Hold

Fltr

3

4

5

6

Fan

System

On Auto Cool Off Heat

7

8

1

2

3. REMOVING OLD THERMOSTAT

WARNING

!

3.1 Turn off power

or

To prevent electrical shock and/or equipment damage, disconnect electrical power to the system at the main fuse or circuit breaker box, or by flipping
a switch at the air handler. Do not restore power until installation is complete.

To ensure the power to your heating and cooling system has been turned off, try to turn on heating or cooling by

changing the temperature on your old thermostat.

5

3.2 Remove the old thermostat cover

CAUTION

!

Remove the old thermostat’s front cover from the wall base. Some covers pull off easily, while others may need to
be removed by prying the cover off with a screwdriver.

Your old thermostat may have a sealed glass tube containing mercury. Be careful not to damage the tube or dispose of the tube in your trash.
For safe disposal information, please see Mercury Notice on page 43.

3.3 Label wires

Tip: Taking a picture with a camera or smartphone can help you not only remember how wires are connected

to the terminals, but can also ensure that you label your wires correctly.

Using your screwdriver, carefully unscrew one wire at a time from the terminal block and attach the corresponding

wire label sticker.

Please note that not all terminals may be used, and that there’s no standard color code for thermostat wires, so
your wire colors may vary. For your reference, we’ve included a terminal label reference chart on page 7 to help you

connect the wires in your old thermostat to your new thermostat in case you get stuck.

6

Terminal labeling reference chart

If your current terminal has

the following letter

Label the wires with the

following letters

Terminal function

RH, R, R5, 5 RH 24V Power (Heating)

RC RC 24V Power (Cooling)

W, W1, 4 W Heating Relay

Y, Y1 Y Cooling Relay

G G Fan Relay

O O

B B

Reversing Valve (for heat pump applications

energized in Cool mode)

Reversing Valve (for heat pump applications

energized in Heat mode)

7

3.4 Identify jumper wire

On your old thermostat, if… Then, on your new thermostat…

Terminal RC and RH are connected

with a jumper wire

There’s only one R wire (RC, RH, R or R5)

coming out of the wall

Terminal RC and RH (or 5 or R5) are NOT

connected by a jumper wire

Leave the jumper wire in its place

Leave the jumper wire in its place

Remove the jumper wire between RC and RH

For terminal Y and W:

If you have a heat pump with reversing valve, connect Y and W with a jumper wire on your new thermostat.

If you need help with labeling and wiring, please contact Customer Support at 877.654.9394 or email
[e-mail] — we’re here to help!

8

3.5 Remove old thermostat base

With all of your wires disconnected and properly labeled, you may now safely remove the thermostat base from
your wall.

Tip: Worried about having your wires falling into your wall? Keep the wires secure by wrapping the them

around a pencil.

9

4. MOUNTING AND WIRING YOUR NEW THERMOSTAT

4.1 Install new thermostat base

Mount your new thermostat base using the supplied screws. Drill holes and insert wall anchors to secure the
thermostat base to the wall, if necessary.

10

4.2 Connect wires to corresponding terminal blocks

CAUTION

!

Match each labeled wire to it’s corresponding terminal on the mounted thermostat base. Insert each labeled wire into
the hole of it’s matching terminal, and using the screwdriver, tighten the screw on the terminal block securely.

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.

4.3 Set switch and advanced wiring

If you have either a gas or oil furnace, set the switch to GAS.

If you have an electric furnace, set the switch to ELEC.

Electric / Gas
switch

11

4.4 Install the batteries and attach front cover

Install the included AAA alkaline batteries and push the front cover on to the thermostat base until it’s secure.

4.5 Turn on power

Turn on your power at the source.

Congratulations! You’ve completed the thermostat installation process

5. CHECK THERMOSTAT OPERATION

Tip: If at any time during testing your system does not operate properly, please contact Customer Support at

877.654.9394 or email [e-mail]

5.1 Fan operation

If your system does not have a G terminal connection, skip to 5.2 Heating system.

1. Move FAN switch to ON position. The blower should begin to operate.

2. Move FAN switch to AUTO position. The blower should stop immediately.

12

5.2 Heating system

CAUTION

!

1. Move SYSTEM switch to HEAT position. If the heating system has a standing pilot, be sure to light it.

2. Press  to adjust thermostat setting room temperature. The heating system should begin to operate.

3. Press  to adjust temperature setting below room temperature. The heating system should stop operating.

5.3 Cooling system

To prevent compressor and/or property damage, if the outdoor temperature is below 50°, DO NOT operate the cooling system

1. Move SYSTEM switch to COOL position.

2. Press  to adjust thermostat setting below room temperature. The blower should come on immediately on high

speed, followed by bold air circulation.

3. Press  to adjust temperature setting above room temperature. The cooling system should stop operating.

13

5.4 Typical wiring diagrams

Typical wiring diagram for heat/cool,

5-wire, two-transformer systems

RH

Y

24 VAC

120 VAC

Hot

Neutral

THERMOSTAT

SYSTEM

G W

HEATING

TRANSFORMER

Heating
System

Fan

Relay

Cooling
System

RC

24 VAC

120 VAC

Hot

Neutral

COOLING TRANSFORMER

OBC

‡

‡

For 2-wire Heat only,
attach to RH and W

14

YC

G W

OB

Heating

Fan

System

Relay

NOTE

Typical wiring diagram for heat only,

3-wire, single transformer systems

JUMPER

RC

WIRE

RH

24 VAC

THERMOSTAT

SYSTEM

TRANSFORMER

Hot

120 VAC

Neutral

‡

Y

OBC

Cooling
System

Typical wiring diagram for heat/cool,

5-wire, two-transformer systems

G W

Fan

Relay

RC

Heating

24 VAC

System

24 VAC

COOLING TRANSFORMER

THERMOSTAT

RH

SYSTEM

HEATING

TRANSFORMER

Hot

120 VAC

Neutral

Hot

120 VAC

Neutral