Lux DMH100 User Manual

INSTALLATION AND OPERATING INSTRUCTIONS

OFF

DMH100 SERIES

DIGITAL MECHANICAL

PRO

Complete, Easy To Read Programming And Installation Instructions Inside

LUX PRODUCTS CORPORATION • Mt. Laurel, New Jersey 08054, USA 44308-04

WARNING: Use Energizer®or DURACELL®Alkaline Batteries Only.

Energizer®is a registered trademark of Eveready Battery Company, Inc.

DURACELL®is a registered trademark of The Gillette Company, Inc.

IMPORTANT!

Thank you for your confidence in our product. To obtain the best

READ THE

INSTALLATION INSTRUCTIONS

FIRST.

These instructions may contain information beyond that required for your particular installation.

Please save for future reference.

FEATURES

• The unit can be used with most 24 volt gas, oil or electric heating and air conditioning systems, gas millivolt heating systems, and single stage heat pumps. It cannot be used with 120 volt heating systems or two stage heat pumps. Ask your dealer for other LUX thermostats to control those systems.

• A large easy to read display shows you the current room temperature at all times.

• The unit has a built in digital control system to accurately control the temperature in your home.

• The unit will learn the temperature characteristics of your home on a daily basis and customize the control to give you the best comfort possible from a digital thermostat.

• You can also select a tighter temperature control if you have a forced hot water system or if closer comfort is preferred over energy savings.

• A press of either the Temperature Up or Down key will reveal the current Set Temperature.

• A 4-minute minimum off time in COOL prevents your air conditioning system from being

damaged.

• Two Energizer®or DURACELL®“AA” alkaline batteries (not included) are used to retain

your time and temperature programs.

results from your investment, please read this manual and acquaint

yourself with your purchase before installing your new thermostat. Then follow the installation procedures, one step at a time. This will save you time and minimize the chance of damaging the thermostat

and the systems it controls.

THERMOSTAT

Easy as

1–2–3

INSTALLATION AND OPERATION

Please read all instructions carefully before beginning installation.

TOOLS REQUIRED

#1 Phillips screwdriver (small) Drill with 3/16-in. (4.8mm) bit

THERMOSTAT LOCATION

On replacement installations, mount the new thermostat in place of the old one unless the conditions listed below suggest otherwise. On new installations, follow the guidelines listed below.

1. Locate the thermostat on an inside wall, about 5 ft. (1.5m) above the floor, and in a room that is used often.

2. 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.

3. 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.

4. Do not locate in a damp area. This can lead to corrosion that will shorten thermostat life.

5. Do not locate where air circulation is poor, such as: in a corner or an alcove; or behind an open door.

6. Do not install the unit until all construction work and painting has been completed.

7. This thermostat does not require leveling.

REMOVING THE OLD THERMOSTAT

1. Remove cover from old thermostat. Most are snapon types and simply pull off. Some have locking screws on the side. These must be loosened.

Switch electricity to the furnace and air conditioner OFF; then proceed with the following steps.

2. Note the letters printed near the terminals. Attach labels (enclosed) to each wire for identification. Remove and label wires one at a time. Make sure the wires do not fall back inside the wall.

3. Loosen all screws on the old thermostat and remove it from the wall.

MOUNTING THE UNIT ON THE WALL

1. Press down on the button on top of thermostat and swing the body away from the base and down to remove the body from the base.

2. Strip insulation 3/8

in. (9.5mm) from wire

ends and clean off any corrosion.

CAUTION

Be careful not to drop the body or disturb electronic parts.

CAUTION

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 fuse box, at the circuit breaker, or at the appliance.

CAUTION

Read instructions carefully before removing any wiring from existing thermostat. Wires must be labeled before they are removed. When removing wires from their terminals, ignore the color of the wires since these may not comply with the standard.

3. Fill wall opening with

non-combustible insulation to prevent drafts from affecting

the thermostat.

CAUTION

• Your thermostat is a precision 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 and millivolt systems. The thermostat should be limited to a maximum of 1.0 amps; higher amperage may cause damage to the thermostat. If you are in doubt, call your utility company.

If you are mounting the base to a soft material like plasterboard or if you are

NOTE

using the old mounting holes, the screws may not hold. Drill a 3/16-in. (4.8mm) hole at each screw location, and insert the plastic anchors provided. Then mount the base as described below.

ATTACHING WIRES

4. Hold the base against the wall, with the wires coming through wherever it is convenient for wiring. Route the wires to below the terminal block. Position the base for best appearance (to hide any marks from an old thermostat). Attach the base to the wall with the two screws provided.

CAUTION

Do not allow wires to touch each other or parts on thermostat. Wires must be trapped between black spacer and brass terminal. Also, be sure to tighten securely all 7 electrical terminal screws.

WIRING DIAGRAMS

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