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I N S TA L L AT I O N A N D
O P E R AT I N G I N S T R U C T I O N S
DMH1 10b Lig hted
52154
Non -Prog rammabl e T hermo stat
LUX Products Corporation - Philadelphia, PA 19112 - www.luxproducts.com
WARNING: U se Ener gi ze r®or DURACELL®Al ka li ne Batteries Only.
Energize r®is a re gistered t rademark o f Eve ready B atter y Company, Inc.
DURACELL®is a re gistered t rademark o f T he Procter & Gamb le Company
Thank you for y ou r confidence in our product. To obtain the best results from your investment, please read these
instructions and acquaint y ou rs el f with your purchase. Follow the installation procedures carefully, and save these
instructions for future r ef er en ce . This will save y ou time a nd minimize the chance of damaging either the thermostat or
the systems that it controls.
SYSTEM COMPATIBILITY:
This thermostat can be used with most s in gl e- st age 24 volt: gas, oil or electric he ating and coo li ng systems, single-stage
heat pumps, or gas Millivolt heating s ys te ms .
It cannot be us ed with: 3-wire zone valves, 120/240 volt heat in g elements, or multi-stage heat pumps. As k your dealer
for other LUX t he rm os ta ts to control those sy st em s.
THERMOSTAT FEATURES:
• 1-Stage Heat / 1-Stage C oo l
• Electronic Accuracy
• Innovative SAVE Feature
• Gas / Elec Fan Option
• Batter y Powered Only
• Set Temp er ature Range 45°F (7°C) d eg re es to 90°F
(32°C) degrees
• Clean, Attractive Design
• LuxLight
• Easy to Install
®
Illuminated Display Screen
• Large, Easy to Read Display
• F/C Selectable Temperature Display
• Adjustable Tem pe ra ture Differential / Cycle Rate
• User Tem pe ra ture Display Calibration
• 5/2 Minute Selectable M in im um Run/Off Time
• On-Screen Low Battery Indicator
• 3-Year Warranty
• No Leveling Required
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OFF
TOOLS YOU MAY NEED:
Screwdrivers, wire stripper / cutter, and possibly a d ri ll with assorted bits (new installations only).
REMOVAL OF OLD THERMOSTAT:
1. Tur n OFF the electricity to all heating and cooling components. D o not turn the electricity back on
until all work is completed.
2. Remove the front portion of your old thermostat to expose the wiring c on ne ct io ns .
3. Write dow n the letters printed near each wire terminal that is used, and a ls o the color of each wire
that is connected to it. Self-adhesive wire labels are also enclosed.
4. Carefully remove the wires one at a time, and be nd them in a manner so that they do not fall back
inside the wall. Do not allow bare wire ends to touch each other.
5. Loosen the mounting screws for the old thermostat and carefully remove it fr om the wall.
THERMOSTAT MOUNTING LOCATION:
On replacement installations, mount the new thermostat in place of the old one unless the conditions listed b el ow
suggest otherwise. On new installations, please follow these general guidelines:
1. Mount the thermostat on an inside wall, about 5 ft . (1.5m) above the floor.
2. Do not locate the thermostat wh er e air circula tion is p oo r such as in a corner, alcove, or behind a door that is normally
left open.
3. Do not locate the thermostat wh er e unusual hea ting or c oo li ng conditions may be present, such a s: direct sunlight,
above a lamp, television, or radiator, or on a wall next to an exterior door or window.
4. Do not locate in a damp environment, as this c an lead to corrosion tha t may shorten thermostat l if e.
5. If painting or construction work is still ongoing, cover the thermostat completely or wait until this work is co mp le te
before installation.
INSTALLATION OF NEW T HERMOSTAT:
1. Strip wire insulation leaving only 3/ 8 in. (9.5mm) bare wire ends, and clean off any c or ro si on present.
2. Fill the wa ll opening with non-combustible insulation to prevent drafts from affecting the thermostat’s normal
operation.
3. Route the wires through the opening in the n ew thermostat base plate, and ho ld the base against th e wall. Try to line
up the screw ho le s from the prior thermosta t, and install the mounting screws.
4. If the previous holes cannot be used, hold the thermosta t base against the w al l so that it a ppears straight and level
(position the base fo r best appearance) and m ar k for the new screw holes. Attach the base to the w al l using the
screws provided (use th e supplied plastic anchors if needed when mounting to a soft ma terial such as drywall).
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CLOSE
Furnace
5 MIN
F
OPEN
HP
2 MIN
C
JP1
JP2
JP3
WIRING TERMINAL CONNECTIONS:
O PEN
C LOSE D
E LECT
G AS
1. When at ta ch in g the wires to the thermostat, please ensure that the bare wire ends are held ALL the way into the
terminal block while th e screw is being tightened.
2. Securely tighten all of the electrical terminal screws, including any un us ed ones. Be careful not t o over tighten the
screws, they only need to be snug.
** Complete heating a nd /o r cooling s ys te m wiring ca n be found in the WIRE IDENTIFICATION AND WIRING
SCHEMATICS se ct io n of th is instruction sh ee t. The schematics sh ow n provide component information fo r brand
new installations or fo r unreferenced wi re s.
SYSTEM CONFIGURATION AND SETUP OPTIONS:
On the circuit bo ar d, there are hardware settings called “jumpers”. These settings can be changed from their d ef au lt
values by removing it s black cap and re in st al li ng the ca p so th at it is positioned
on only one ( 1) of the metal pins, and no t both. A CLOSED jumper means the
black cap is on both of the m et al pins, and an OPEN jumper me an s the cap is o n
only one (1) me ta l pin.
HARDWARE RESET BUTTON: A change to ANY of the ju mp er settings will not be
recognized by the t he rm os ta t until the white HA RD WARE RESET button o n the
circuit board is pr es se d.
JP1 (SYSTEM): [CLOSED = Furnace, default] Th is setting is used for the majority of all heating
systems that are not heat pumps. Examples for this setting would be: natural gas furnace, hot
water baseboard heat, and oil heat. [ OP EN = Heat Pump] Us e this setting if you have a heat
pump unit (which lo ok s just like an outside air conditioning unit, but is used for both cooing and
heating).
JP2 (DELAY): [CLOSED = 5 Minutes, defa ul t] This setting changes the length of time th at the
system must remain ei th er on or off before it will switch to the alternate on or off state. The
main purpose of t hi s setting is to provide equipment protection by preventing brief or u nd es ir ab le
frequent on/off cycling. [OPEN = 2 Minutes] This can be us ed to decrease the minimum amount
of time that occurs between cycles, and may be desired for hot wat er radiator systems to r ed uc e
overshoot.
JP3 (SCALE): [CLOSED = Fahrenheit, default] All temperature values are displayed in F˚ de gr ee s.
[OPEN = Celsius] This setting displays all temperature values in C˚ degrees.
JP4 (FAN): This o pt io n is loca ted separately from the first three s et ti ng s shown above.
[CLOSED = Gas, default] This setting le ts the heat in g system it se lf control the blower fan
automatically. Types of systems that would typically use the “Gas” fan setting w ou ld be: natural
gas furnace, propane furnace, an d oil f ur nace.
[OPEN = Elec] This setting runs the system’s blower fan when heat is called for, an d is required
for systems that do not control their o wn fan while in HE AT mode. Heat pump systems, and units
with an electric he ating element typically require th is setting.
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OPERATING INSTRUCTIONS:
HEAT / OFF / COOL, SYS TE M MODE SWITCH: Set this switch to HEAT t o control your heating s ys te m, and COOL to control
your cooling system. The OFF position wi ll disable both the heat in g and cooling units.
AUTO / ON, FAN SWITCH: When this switch is in AUTO, the blow er fan (if present in your system) will automatically cycle
on and off by itself when heating o r cooling is running. When in the ON position, the blo wer fan w il l run constantly with
or without a de ma nd for heating or co ol in g, even in OFF mode.
UP AND DOWN B UT TO NS : While in HEAT or COOL mode, you can use the UP and D OW N buttons to raise or lower the set
temperature. When the thermostat is powered u p for the first time, it w il l use the default set temperatures of 68°F
(20°C) for Heat mode and 72°F (22°C) fo r Cool mode. NOTE: when you adjust the temperature using UP and DOWN
buttons, the change occurs immediately and you do not
SAVE B UT TO N: Reducing the amount of heating and cooling energy you use will directly save you money. The SAVE
feature allows you to use just one button press to easily d ec re as e the current set temperat ur e by 5F (3°C) degrees while
in Heat mode (or raise the set te mp er ature by 5°F (3°C) d eg re es while in Cool mode). When you leave the house, simply
press the SAVE button one time t o put the thermostat i nt o Save mode, and the word “SAVE” will be sho wn on the screen.
When you return h om e, press the SAVE button again to cancel the Save mode and return back to the previous se t
temperature that you were using originally.
After Save mode has been started, you can adjust the energy-sa vi ng set temperature by us in g the UP and DOWN buttons
in either direction. Just like above, one more press on the SAVE button will cancel the Save mode and return back t o the
original set temperature that was used prior to starting Save mode.
LCD DISPLAY BACKLIGHT: The display screen has a light that will assist viewing at nighttime, or in low lighting a re as .
When any front panel button is pressed, the screen will light up for approximately 10 seconds. An y button presses that
occur while the b ac kl ig ht is on, will reset the 1 0 second timer, causing the screen to remain illuminated for an additional
10 seconds.
have to press the SAVE button to accept the changes.
STATIC N OTICE:
risk of damaging the unit in extremely dr y wea th er, please touch a grounded metal object be fo re touching your
thermostat.
This thermostat is protected against normal minor static electric discharges, ho wever to minimize the
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ADVANCED FEATURES:
TEMPERATURE SWING: The amount of temperature varia ti on between load-on and load-off is changed by adjusting th e
swing setting. The default value for this therm os ta t is #4, and the adjustment range is from #1 to #9. A smaller swing
number makes the te mp er ature control more precise a nd constant, and increases the number of cycles per hour. A larger
swing number will produce a greater variation between load-on and load-off events, and decreases the number of cycles
per hour.
To adjust the Swing setting: Set the thermostat to OFF mode using the System Mode switch, and hold down th e SAVE
button for at least 5 seconds. When the screen c ha ng es to a single digit, this i s the current Swing setting value and it
can be adjusted u si ng the UP or DOWN buttons. The thermostat will return back to the normal Run mo de screen if no
buttons are pressed f or 4 seconds.
TEMPERATURE CALIBRATION: This thermostat is accurately ca li br ated at the factor y, and in most cases alteration to this
setting should not be required. Th e Calibration f ea ture allows you to manually offset the room te mp er ature measurement
by as much as plus or minus 5°F (3°C) degrees from its original value. 0°F (0°C) is the default s etti ng .
To adjust the Calibration setting: S et the thermostat to O FF mode using the System Mode switch, press both
DOWN together for a t least 2 seconds. When the s cr ee n changes to a single digit, t hi s is the current Calibra ti on setting
value and it ca n be adjusted using the UP or DOWN buttons. The thermostat will return back to th e normal Run mode
screen if no bu tt on s are pressed for 4 seconds.
the UP and
BATTERY REPLACEMENT:
This thermostat is powered by two “A A” A lk al in e batteries. The batteries should be replaced AT LEAST once per year (or
sooner, if the “LOW BAT” battery symbol a pp ea rs in the display screen). When the LO BAT symbol is shown, the
temperature digits will also display the word “Lo”. The batteries are loca te d on the back of the circuit board, and can be
accessed by pulling t he front portion of the thermostat straight outwards and removing it from the wall. When installing
new batteries, w e recommend using only brand new Energizer
observ e the polarity markings show n in the battery compartment to ensure proper installation. When finished, li ne up the
front of the th er mo st at to the base, and firmly press together.
®
or DURACELL®, “AA” size alkaline batteries. Please
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TECHNICAL SUPPORT:
If you have any problems installing or using this thermostat, pl ea se carefully and thoroughly review the instruction
manual. If you require assistance, please c on tact our Technical Assistance department at 85 6- 23 4- 88 03 during regular
business hours between 8: 00 AM and 4:30PM Eastern Standard Time, Mo nd ay through Friday. You can a ls o receive
technical assistance online a nytime day or night at http://www.luxproducts.com. Our web site o ff er s you ans wers to t he
most common technical q ue st io ns , and also permits you to em ai l your questions to our technical support staff at your
convenience.
LIMITED WARRANTY:
If this unit fa il s because of defects in materials or workmanship within three years of the date of original purchase, LUX
will, at i ts option, repair or replace it. This warranty do es not cover damage by accident, misuse, o r failure to follow
installation instructions. Implied warranties are limited in duration to three years from the date of original purchase.
Some states do not allow limitations on how lo ng an implied warranty lasts, so t he above limita tion may no t apply to you.
Please return malfunctioning or defective units to the location from which the purchase was made, along with proof of
purchase. Please refer to “TECHNICAL ASSISTANCE” b ef or e returning thermosta t. Purchaser assumes all risks and
liability for incidental an d consequential damage resulting f ro m installation and use o f this unit. Some states do not
allow the exclusion of incidental or consequential damages, so th e above exclusion m ay not apply to yo u. This warranty
gives you specific le ga l rights and you may also have other rights, which v ar y from state to state. Applicable in the
U.S.A. and Canada only.
MERCURY WARNING AND RECYCLING NOTICE:
Mercur y is considered to be a hazardous material. If th is product is replacing a thermostat that contains m er cu ry in a
sealed tube, contact your local waste management authority for instructions regarding recycling and proper disposal. It
may be unlawful in your state to place it in the tr as h.
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RC
V
R
Y1
6
Y
F
G
GYO BWRH RC
1-STAGE, COOLING ONLY
Factory RH-RC Jumper Wire Installed
FAN
24 V
POW ER
COMMON
AI R
CON DIT IO NER
3, 4 WIRES
BLACK TERMINAL LETTERS ARE TYPICAL, GRAY TERMINAL LETTERS ARE BRAND SPECIFIC
2
X
C
WI RING D IAGRAM NOTES:
W1
4
W
RH
V
R
F
G
GYO BWRH RC
HEATING ONLY (INCLUDING MILLIVOLT)
(2-WIRE HEAT USE “RH” & “W”)
Factory RH-RC Jumper Wire Installed
FAN
24 V
POW ER
COMMON
HE ATER
2, 3, 4 WIRES
BLACK TERMINAL LETTERS ARE TYPICAL, GRAY TERMINAL LETTERS ARE BRAND SPECIFIC
FAN WIRE
MAY NOT BE
PRESENT IN
ALL SYSTEMS
1
X
C
1. T he BOL D l ine s a re wha t you should be connecti ng to the termi nal s o n this new thermos tat.
2. T he DA SHED l ines a re opt ional depen din g u pon yo ur sys tem ty pe.
3. I n m any cases , the thin lines sho wn as “SYSTEM COMMON” will not be vis ible a t t he the rmostat
lo cation, they are located wit h your heati ng and cooli ng equ ipment.
4. F or Hea t P ump s, use t he “B ” or “O” wire, NOT B OT H. Typ ically neither are used in a conv ent ional
sy stem.
5. I f “Y” a nd “C ” wir es are both presen t, th en “C ” is a co mmon w ire.
6. I f y ou hav e a “B” wire i n your syste m w hic h i s used as a comm on wir e, co nnecting it to the “ B”
te rminal on th is the rmost at may damag e your syste m and/ or the therm ostat.
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W1
4
W
RH
V
R
Y1
6
Y
F
G
GYO BWRH RC
CONVENTIONAL (NON HEAT PUMP)
1-STAGE HEATING AND 1-STAGE COOLING
Factory RH-RC Jumper Wire Installed
FAN
24 V
POW ER
COMMON
HE ATER
AI R
CON DIT IO NER
4, 5 WIRES
BLACK TERMINAL LETTERS ARE TYPICAL, GRAY TERMINAL LETTERS ARE BRAND SPECIFIC
3
X
C
F
G
R
V
RH
R
V
RC
W1
4
W
Y1
6
Y
GYO BWRH RC
1-STAGE HEATING AND 1-STAGE COOLING
WITH TWO SEPARATE 24V TRANSFORMERS
Factory RH-RC Jumper Wire REMOVED
FAN
COMMON
HE ATER
AI R
CON DITI ONER
5, 6 WIRES
BLACK TERMINAL LETTERS ARE TYPICAL, GRAY TERMINAL LETTERS ARE BRAND SPECIFIC
24 V H EAT
POW ER
24 V CO OL
POW ER
5
X
C
F
G
FAN
O
B
** Use “O” or “B”
Terminals, Never Both
RC
V
R
Y1
6
Y
GYO BWRH RC
SINGLE-STAGE HEAT PUMP SYSTEM
WITH NO AUX OR EMERGENCY HEAT
Factory RH-RC Jumper Wire
24 V
POW ER
COMMON
4, 5 WIRES
BLACK TERMINAL LETTERS ARE TYPICAL, GRAY TERMINAL LETTERS ARE BRAND SPECIFIC
HE AT
PU MP
RE VER SIN G
VALVE
ADD Y-W Jumper Wire
4
X
C
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