3M 3M-08 Install Manual - User Manual

Full Text Searchable PDF User Manual

Location

Caution

Tools

To avoid electrical shock and to prevent damage to the furnace, air conditioner,
and thermostat, disconnect the power supply before beginning work.
This can be done at the circuit breaker, or at the appliance.

C A U T I O N

Your thermostat is a precise instrument.
Please handle it with care.
Turn off electricity to the appliance before installing or
servicing thermostat or any part of the system. Do not
turn electricity back on until work is completed.
Do not short (jumper) across electric terminals at
control on furnace or air conditioner to test the system.
This will damage the thermostat and void your warranty.
All wiring must conform to local codes and ordinances.
This thermostat is designed for use with 24 volt AC and
millivolt systems. The thermostat should be limited to a
maximum of 1.0 amps; higher amperage may cause
damage to the thermostat.

On replacement installations, mount the new thermostat in place of the
old one if possible.
On new Installations, follow the guidelines listed below.
Locate the thermostat on an inside wall, about 5 ft. (1.5m) above the
floor, and in a room that is used often.
Do not install it where there are unusual heating conditions, such as: in
direct sunlight; near a lamp, radio, television, radiator register, or
fireplace; near hot water pipes in a wall; near a stove on the other side
of a wall.

Do not locate in unusual cooling conditions, such as: on a wall separating
an unheated room; or in a draft from a stairwell, door, or window.
Do not locate in a damp area. This can lead to corrosion that will shorten
thermostat life.
Do not locate where air circulation is poor, such as: in a corner or an
alcove; or behind an open door.
Do not install the unit until all construction work and painting has been
completed.
This thermostat does not require leveling.

You will need #1 Phillips screwdriver (small) and
Drill with 3/16-in. (4.8mm) bit for this installation.

Good

5ft.

(1.5m)

Install Guide 3M-08

Remove old unit

Label Wires to Old Unit

Mount the 3M-08

Separate front from back of unit. Grasp the

front of the unit and the back of the unit and pull apart.
The thermostat body away from the base.
Hold the base against the wall, with the wires coming
through the opening below the terminal block.
Position the base for best appearance
The 3M-08 can be mounted vertically or horizontally.
chose the position that best suites your wall.
Attach the base to the wall with the two screws
provided.
If you are mounting the base to sheet rock or if
you are using the old mounting holes, use the
plastic anchors provided.

Drill a 3/16-in.(4.8mm)
hole for the insert at

each screw location,
then mount the base.

Terminal Block

Switch electricity to the furnace and air conditioner OFF;
then proceed with the following steps.
Remove cover from old thermostat. Most are snap-on types and simply pull
off. Some have locking screws on the side or front. These must be loosened.
Note the letters printed near the terminals.
Carefully attach labels (enclosed) to each wire. Label the wires one at a time.

You must have all the wires labeld before you procede.

Remove the wires from the terminals of the old thermostat.
Make sure the wires

do not fall back inside

the wall.

Wind them around a pencil to

keep them from falling

Remove the old thermostat from the wall. Fill wall
opening with fiber glass insulation to prevent drafts.

Caution

DO NOT REMOVE WIRES FROM OLD THERMOSTAT UNTIL YOU HAVE
CAREFULLY LABELED THEM, WITH LABELS PROVIDED.
THERE IS NO STANDARD COLOR CODE FOR THESE WIRES.

Before you Connect Wires

Caution

Do not allow wires to touch each other or parts on thermostat.
Wires must be routed through the hole in the back plate, below the
terminal block, or they will hit parts on the cover.

Please follow these guidelines for safe and secure wire connections.

Determine which step-by-step wiring diagram you should use. Make sure your
wires are labeled. This may require you to find the 'other end' connection for each
wire on your heating or airconditioning equipment and read the label there.
If you have a wire maked "C" its connection is optional. If you do connect it the
thermostat will draw power from the C wire and this will extend battery life.

Optional Wire Connections

What Wires Do you Have?

Strip insulation 3/8 in. (9.5mm) from wire ends.
Take care not to damage the labels for each wire in handling.
Connect labeled wires only to a terminal with corresponding letter.
Bend the wire slightly, insert the wire under the contact plate and
tighten the screw down onto the wire.

Go To Page 13

Go To Page 14

Go To Page 12

Go To Page 11

R - Single source power for heat/cool
Note: R connects to both RC and

RH using the Orange jumper

RH or 4 - HEATING POWER

RC - COOLING POWER

W - HEATING CONTROL

G - FAN RELAY

C - Common side of Heating Power

Y - COMPRESSOR

O - If you have this wire the 3M-08
will not control your system.

B - If you have this wire the 3M-08 will
not control your system.

When you have finished making connections.
Re-attach the the body onto the base by
pressing it firmly onto the base.

Install Batteries

Wiring complete

Check Unit

The 3M-08 requires 2AA batteries if the C-wire
is not available in your furnace installation.
Switch MODE switch to OFF and
the FAN switch to AUTO.
Remove the control unit form the wall unit.
Install 2 AA alkaline batteries according to the
polarity noted in the compartment.
(DO NOT USE Rechargable Batteries)

NOTE:

Replace the batteries when the red LOW battery LED

indicator blinks or once a year.

Caution:

The thermostat will go "off" if the batteries die. This exposes

your house to unexpected heat or cold and should be avoided.

Follow these procedures to verify you have correctly installed the unit.

To check Fan: (If you connected the G wire - fan relay)
Switch the FAN switch to the ON position.
Verify that air is blowing from the system.
Return to AUTO position for normal operation.

To check HEAT mode:

Set the mode switch to HEAT. Set the fan switch
AUTO.
Turn TEMP DIAL counter clockwise to its stop.
Allow the system 5 min to respond.
Verify that heat is blowing from the system.

To check COOL mode:

Turn TEMP DIAL clockwise to its stop.
Allow the system 5 min to respond.
Verify that cool air is blowing from the system.

Temperature

Dial

HEAT/COOL
Mode Switch

Fan

Switch

Note:

If you have electric heat, turn the
thermostat over
and find the GAS/ELECTRIC heat
selector on the back of the control
unit(see diagram below). Move the
selector jumper to the ELECT
position.

1) The 3M-08 can run on batteries only.

(2AA Alkaline)

The batteries will last well over 1 year. If the batteries are not replaced the
thermostat will stop working.

2) The 3M-08 can run on the C wire if available.

24VAC ONLY

As shown in the wiring diagrams, The C wire is the other side of the 24VAC
heating transformer. If the C wire is used, the batteries are not needed.

Power Options

Check Unit cont.

Congratulations, you have successfully installed your unit. Please
proceed to the OPERATING Guide to initialize the new thermostat.

Gas/Electric jumper

STEP 1 -

Connect the

(or RH) wire to

the

terminal on the thermostat.

This connects the Heater Power to the

thermostat.

STEP 2 -

Connect the

wire to the

terminal on the thermostat.

This connects the heater control line to the thermostat.

Your Heater is now concected to the thermostat.

STEP 1 -

Connect

the

(or RH) wire to the

terminal

on the thermostat. This connects to

the Heater Power .

STEP 2 -

Connect the

wire to the

terminal on the thermostat.

This connects the heater control line to

the thermostat.

STEP 3 -

Connect the

wire to the

terminal on the thermostat.

This connects the Fan to the thermostat.

Your system is now conected to the thermostat.

Return To Page 7

2 WIRE Heating

(GAS MILLIVOLT or 24vac

NOTE: Wires marked with the dotted line are optional.

3 WIRE

FURNACE

jumper
wire

Heat
Power

Heat

FAN

Thermostat

jumper
wire

FURNACE

HEAT

Thermostat

HEAT
Power

STEP 1 -

Connect the

wire to the

terminal on the thermostat. This

connects to the Cooler compressor.

STEP 2 -

Connect the

wire

to the

terminal on the thermostat.

This connects the Heater/Cooler

Power.

STEP 3 -

Connect the

wire to the

terminal on the

thermostat. This connects to the heater control line.

STEP 4 -

Connect the

wire to the

terminal on the

Thermostat. This connects to the Fan.

Your HVAC system is now conected to the thermostat.

STEP 1 -

Remove the orange

Jumper wire.

STEP 2 -

Connect the

wire to

the

terminal on the thermostat.

This connects to the Cooler

compressor.

STEP 3 -

Connect the

wire to the

terminal on the thermostat. This connects to the

Heater Power .

STEP 4 -

Connect the

wire to the

terminal on

the thermostat. This connects to the Cooling Power .

STEP 5 -

Connect the

wire to the

terminal on the thermostat.

This connects to the heater control line.

STEP 6 -

Connect the

wire to the

terminal on the Thermostat.

This connects to the Fan.

Your HVAC system is now conected to the thermostat.

Return To Page 7

5 WIRE

4 WIRE

NOTE: Wires marked with the dotted line are optional.

HVAC SYSTEM

jumper
wire

Heat

Power

Heat

FAN

Cool

Comp

Thermostat

HVAC SYSTEM

Remove
jumper
wire

HEAT
Power

Heat

FAN

Cool

Comp

COOL
Power

Thermostat

The 3M-08 can be used with most 24 volt gas, oil or electric
heating and air conditioning systems, or gas millivolt heating
systems. It cannot be used with 120 volt heating systems or heat
pump systems. Ask The Home Depot for other thermostats to
control those systems.

The 3M-08 is digital. You can program your desired Heat and cool
temperature by setting the dial. The unit uses no harmful mercury.

A 5-minute minimum off time in COOL protects your air
conditioning system from being damaged.

Two "AA" batteries (not included) are used to run the thermostat
in some installation. "C" wire installations require no batteries.

3M-08 Features

1006-007

Customer Support: 888-607-5824

or Visit our website www.radiothermostat.com/filtrete

Ask a Question ?