Lux DMH105 Non-Programmable Thermostat Installation Instruction

Lux DMH105 Non-Programmable Thermostat

Introduction

Complete, Easy To Read INSTALLATION AND OPERATING INSTRUCTIONS

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!
Please read all instructions carefully before beginning installation and save for future reference. Before removing any wiring from your existing thermostat, the wires must be labeled with their terminal designations. Ignore the color of the wires since they may not comply with any standard.
Thank you for your confidence in our product. To obtain the best results from your investment, please read these instructions carefully and thoroughly. You should become fully acquainted with this thermostat before installing it for usage. Follow the installation procedures carefully, and one step at a time. This will save you time and minimize the chance of damaging either the thermostat or the systems that it controls. These instructions may contain information beyond that required for your particular installation. Please save these instructions for future reference.

COMPATIBILITY

The DMH105 and DMH110 can be used with most single-stage 24 volt gas, oil, or electric heating and air conditioning systems, single stage heat pumps, or gas Millivolt heating systems. It cannot be used with 3 wire zone valves, 120 volt heating systems, or multi-stage heat pumps. Ask your dealer for other LUX thermostats to control those systems.

FEATURES

• 1 Stage Heat / 1 Stage Cool
• Electronic Digital
• Innovative “SAVE” feature
• Gas / Electric Blower Option
• System or Battery Powered
• Setting Temperature Range 45°F to 90°F
• Clean, Attractive Design
• Easy To Install
• EL (Electro Luminescent) Backlight Display (DMH110 ONLY)
• Large, Easy To Read Display
• F/C Selectable Temperature Display
• Adjustable Temperature Differential /Cycle Rate
• User Temperature Offset / Display Calibration
• 5/2 Minute Selectable Minimum Run/Off Time
• On-Screen Low Battery Indicator

CAUTION:
The DMH105 and DMH110 are protected against normal static electric discharges. However, in extremely dry weather you should touch a grounded metal object before touching the thermostat to minimize the risk of causing damage to the unit.

INSTALLATION

PLEASE READ ALL INSTRUCTIONS CAREFULLY BEFORE BEGINNING INSTALLATION.

CAUTION: Turn off electricity to the appliance before installing or servicing the thermostat or any part of the system. Do not turn the electricity back on until the work is completed.

• Your thermostat is a precision instrument. Please handle it with care.
• Do not short (jumper) across the electric terminals on either the furnace or air conditioner to test the system. This may damage the thermostat and void your warranty.
• All wiring must conform to all applicable local codes and ordinances.
• This thermostat should be limited to a maximum of 1.5 amps; higher current may cause damage to the thermostat.

TOOLS REQUIRED

• #1 Phillips screwdriver (medium)
• Drill with 3/16-in. (4.8mm) drill bit
• Wire stripper/cutter

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, at 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: direct sunlight, near a lamp, television, radiator, register, fireplace, on a wall opposite a stove, or that carries hot water pipes.
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 where air circulation is poor, such as: in a corner or alcove, or behind an open door.
5. Do not locate in a damp area. This can lead to corrosion that may shorten thermostat life.
6. Do not install the unit until all construction work and painting has been completed.

CAUTION:

• Read all instructions carefully before removing any wiring from existing thermostat.
• Wires must be labeled by their terminal letters before they are removed.
• Do not allow wires to touch each other or parts on thermostat.
• When removing wires from their terminals, ignore the color of the wires since these may not comply with any standard.

REMOVING THE OLD THERMOSTAT

1. Switch OFF the electricity to both the furnace and air conditioner; then proceed with the following:
2. Remove cover from old thermostat. Most are snap-on types and simply pull off. Some have screws on the sides, these must be loosened first.
3. Take note the letters printed near the wire terminals. Attach labels (enclosed) to each wire for identification by terminal letter, not color.
4. Make sure the wires do not fall back inside the wall, and remove and label one wire at a time.
5. Loosen all screws on the old thermostat and/or base, and remove it from the wall.

MOUNTING THE DMH105 and DMH110

1. Strip insulation leaving 3/8 in. (9.5mm) of bare wire on the ends and clean off any corrosion present.
2. Fill the wall opening with non-combustible insulation to prevent drafts from affecting the thermostat.
3. Pull your new thermostat apart by opposite pressure on the two thumb tabs located on the bottom edge of the thermostat to separate the unit.
   CAUTION: Be careful not to drop the body or disturb any of the electronic parts.
4. Hold the base against the wall. Route the wires through the larger hole adjacent to 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.
   NOTE: If you are mounting the base to a soft material like plasterboard, or if you are 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.
   CONNECTING THE WIRES
5. Clean bare wire ends must be inserted between the black clamp plate and the brass terminal.
6. Securely tighten all electrical terminal screws (even unused ones).
   

   WIRING INFORMATION

7. Complete heating and/or cooling system wiring can be found in the WIRE IDENTIFICATION AND WIRING SCHMATICS section of this instruction sheet. The schmatics shown provide component information for brand new installations or for unreferenced wires.
   NOTE: Before use, remove the plastic film (if present) that is protecting the LCD display screen.
8. Install two (2) Energizer® or DURACELL® “AA” size Alkaline Batteries at this time. For instructions on installing the batteries, see the “BATTERIES AND MAINTENANCE” section.
9. Install your new thermostat onto its base. To do this, line up the tabs on all four corners and gently push the unit straight onto the base, also providing pressure in the center of the unit to ensure a proper union for all connection points. Do not use unnecessary force if the body does not snap into place easily. Remove the body, line it back up and try again.
10. Turn the electrical power back ON to both your heating and/or air conditioning systems.
11. Verify that both systems (and the blower fan) are operating properly. When set to a high temperature, the heating system should provide warm air after a short time in Heat Mode. Likewise, a cooling system should provide cool air after a short time when set to a low temperature in Cool Mode. Usually, sound from the furnace and air conditioning units can be heard while either of them is running. The rush of moving air should be heard within a short time after either has been started.
12. Your installation is now complete.
    NOTE: If you have an Electric Heat system and the blower does not operate after installation, locate the “Gas/Electric” option inside the back of the thermostat. Move the jumper to the “Electric” position.

SETUP OPTIONS

NOTE: This thermostat is able to be installed and used without changing the items in this SETUP OPTIONS section. These are optional, and are provided to meet your personal preferences.

HARDWARE RESET
The Hardware RESET button restarts your thermostat’s internal programming and then returns the unit back to normal operation. A press of this button is required to recognize any jumper setting changes performed at the back of the thermostat on the circuit board. This reset is a white button located inside on the back of the thermostat, on the circuit board. It is labeled RESET.

JUMPER SETTINGS
There are four (4) headers (or jumpers) located inside the thermostat at the rear of the circuit board. These settings can be changed from their default values by removing its corresponding black jumper cap and reinstalling the cap so that it is positioned on only one (1) of the metal pins, and not both. A change to ANY of the jumper settings will not be recognized by the thermostat until a HARDWARE RESET is performed. An OPEN jumper means the cap is only on one (1) metal pin, and a CLOSED jumper means the cap is on both of the metal pins. Each of these jumpers changes a different option, the choices for these options are listed in a table printed on the circuit board.
A table similar to this one shown here is printed on the thermostat’s circuit board. There may be minor differences in some of the wording of your specific model, but the function of each option will be the same.

	CLOSE	OPEN
JP1	5 MIN	2 MIN
JP2	F	C
JP3	NARROW	WIDE
JP4	ELECT	GAS

JP1 – 5 OR 2 MINUTE MINIMUM RUN/OFF TIMES
This setting changes the minimum length of time that the heating or cooling system must remain either on or off before it will automatically switch to the alternate on or off state. The purpose of this feature is to provide air conditioning compressor protection by preventing brief or undesirable on/off cycling.

JP2 – FAHRENHEIT OR CELSIUS DISPLAY FORMAT
This setting controls whether the temperature is displayed in degrees °F or °C on the LCD screen.

JP3 – TEMPERATURE SWING SETTING
This setting changes the size of the temperature control band with respect to the set point. The larger the swing setting, the larger the temperature control range will be. Conversely, the smaller the swing setting, the smaller (or tighter) the temperature control range will be. This setting is called NARROW and WIDE. JP4 – GAS / ELECTRIC FAN OPERATION
This setting changes whether the system’s blower fan (if applicable) is controlled by the thermostat in HEAT mode. Choose ELECTRIC if you have electric heating, and require the thermostat to control the fan. Choose GAS if you have a gas heating system, this will allow the furnace itself to control the operation of the blower fan.

OPERATING INSTRUCTIONS

SYSTEM MODE SWITCH:
The MODE switch has three positions: HEAT, OFF, and COOL. In the winter, set the mode switch to HEAT to control your heating system; in the summer, set the switch to COOL to control your air conditioning. In the spring and fall, or when the windows are open, you can set the switch OFF. When the switch is in the HEAT position, the word “HEAT” will be displayed next to the temperature. When the switch is in the COOL position, the word “COOL” will be displayed next to the temperature. Either of these indicators will be flashing if the system is currently running, or on steady if the system is not currently running.
NOTE: When the system mode switch is in the OFF position, it is normal for the system’s blower fan (“G” terminal if used) to still become activated depending upon the position of the FAN mode switch (see below).

FAN MODE SWITCH:
The FAN switch has two positions: AUTO and ON. Whenever the fan is commanded on by the thermostat, the word “FAN” will flash on the LCD display.

• In the AUTO position, the operation of the blower fan is determined only by the on/off cycling of the heating and cooling systems.
• When the FAN switch is in the ON position, the system’s blower fan will be commanded ON, and remain ON while the FAN switch is in the ON position (this also includes when the System Mode Switch is in the OFF position).
  NOTE: The FAN switch only works if your system provides a wire for the thermostat’s “G” terminal.

PUSH BUTTONS:
There are three push buttons below the unit’s display screen. These are used to: adjust the set point temperature, modify the values for user changeable options, and to select the “SAVE” feature.

TEMPERATURE ADJUSTMENT:
While in HEAT or COOL mode, a single press on either the UP or DOWN button causes the word “SET” to appear on the screen. Once “SET” is present, the set point can be altered by pressing either the UP or DOWN button once per degree of change, or by holding either button down for at least two seconds to automat-ically increment the set point quickly in the associated direction.

SAVE FEATURE:
To Enter Save Mode

• Press the Save button.
• “SAVE” will be visible in the display
• The save temperature will be displayed flashing
• In heat mode, the save temperature will be 5°F lower than the comfort temperature.
• In cool mode, the save temperature will be 5°F higher than the comfort temperature.
• While flashing, the “SAVE” temperature may be changed with the UP/DOWN buttons.
• After 5 seconds with no button presses, the displayed “SAVE” temperature will be used as the set temperature, and ambient temperature will be returned to the display.
• “SAVE” will remain visible until the “SAVE” mode is cancelled.

To Adjust SAVE Temperature

• In “SAVE” mode “SAVE” will be visible in the display
• Press UP or DOWN button
• The save temperature will be displayed flashing.
• The flashing the “SAVE” temperature may be changed with the UP/DOWN buttons.
• After 5 seconds with no button presses, the displayed “SAVE” temperature will be used as the set temperature, and ambient temperature will be returned to the display.

To Cancel SAVE Mode

• In “SAVE” mode, Press the SAVE button.
• The “SAVE” indicator will be extinguished and the comfort temperature will be displayed flashing.
• The flashing comfort set temperature may be changed with the UP/DOWN buttons. After 5 seconds with no button presses, the comfort temperature will be made the new set temperature, and ambient temperature will be returned to the display.

DISPLAY ILLUMINATION (DMH110 ONLY):
Pressing any button will illuminate the display for easier viewing in dim light conditions. The light will remain on for approximately 10 seconds. While the light is illuminated, pressing any of the three push buttons will continue the lighting and remain on for approximately 10 more seconds.

USER TEMPERATURE CALIBRATION:
If the ambient temperature displayed on the LCD screen does not exactly match a nearby thermometer, or perhaps another thermostat in the home, the user has the ability to adjust or shift the displayed temperature. The displayed temperature can be altered by up to 5°F (or 3°C) in either direction. This adjustment is performed by first placing the System Mode switch to the OFF position, then by pressing and holding both the UP and DOWN buttons together for at least two (2) seconds, the screen will display the word SET, and the default selection of zero (0). Press either the UP or DOWN buttons for the associated direction of change. Note: If no buttons are pressed within four (4) seconds, the thermostat will return back to normal run mode.

BATTERIES AND MAINTENANCE

INSTALLING NEW BATTERIES
The DMH105 and DMH110 thermostats do not require batteries to operate your heating and cooling systems, however if you are planning on using only system power to run your thermostat, we do strongly recommend the use of good quality alkaline batteries in addition to the system power source. Replace the batteries when the “LO BAT” indicator appears in the display, or At Least Once A Year.

1. To access your unit’s battery location, remove the front half of the thermostat from its base plate by applying opposite pressure on the two thumb tabs located on the bottom edge of the thermostat and separate the unit.
2. The battery tray is located adjacent to the circuit board.
3. Remove the used batteries from the battery tray (if present) and install two new Energizer® or DURACELL® “AA” size Alkaline Batteries into the battery compartment. Observe the correct polarity markings shown in the compartment.
4. Install your new thermostat back onto its base plate. To do this, line up the tabs on all four corners and gently push the unit straight onto the base. Do not use unnecessary force if the body does not snap into place easily. Remove the body, line it back up and try again.

TECHNICAL ASSISTANCE
If you have any problems installing or using this thermostat, please carefully and thoroughly review the instruction manual. If you require assistance, please contact our Technical Assistance Department at 856-234-8803 during regular business hours between 8:00AM and 4:30PM Eastern Standard Time, Monday through Friday. You can also receive technical assistance online anytime day or night at http://www.luxproducts.com. Our web site offers you answers to the most common technical questions, and also permits you to email your questions to our technical support staff at your convenience.

WARRANTY

Limited Warranty: If this unit fails because of defects in materials or workmanship within three years of date of original purchase, LUX Products Corporation will, at its option, repair or replace it. This warranty does not cover damage by accident, misuse, or failure to follow installation instructions. Implied warranties are limited in duration to three years from date of original purchase. Some states do not allow limitations on how long an implied warranty lasts, so the above limitation may not apply to you. Please return malfunctioning or defective units to the participating retailer from which purchase was made, along with proof of purchase. Please refer to “TECHNICAL ASSISTANCE” before returning thermostat. Purchaser assumes all risks and liability for incidental and consequential damage resulting from installation and use of this unit. Some states do not allow the exclusion of incidental or consequential damages, so the above exclusion may not apply to you. This warranty gives you specific legal rights and you may also have other rights which vary from state to state. Applicable in the U.S.A. only.

WIRE IDENTIFICATION AND WIRING SCHEMATICS

WIRING DIAGRAM NOTES:

1. The BOLD lines are what you should be connecting to the terminals on this new thermostat.
2. The DASHED lines are optional depending upon your system type.
3. In many cases, the thin lines shown as “SYSTEM COMMON” will not be visible at the thermostat location, they are located with your heating and cooling equipment.
4. For Heat Pumps, use the “B” or “O” wire, NOT BOTH. Typically neither are used in a conventional system.
5. If “Y” and “C” wires are both present, then “C” is a common wire.
6. If you have a “B” wire in your system which is used as a common wire, connecting it to the “B” terminal on this thermostat may damage your system and/or the thermostat.

Reference

Download manual: Lux DMH105 Non-Programmable Thermostat Installation Instruction

Lux DMH105 Non-Programmable Thermostat Installation Instruction