Comfort Stat BLU1719 Owner's Manual

TIME

Program Thermostat Owners Manual

Model:BLU1719

FEATURES

Structure of thermostat and explanation for the keypads

We are pleased you have selected one of our broad line of wall thermostat. Our products
are manufactured to high quality standards and are designed for years of service.

Read This Before Installing Thermostat
IMPORTANT

1,Read the entire installation section of this Owner’s Manual thoroughly b efore you
begin to install or operate your Thermostat.
REMOVE THE MYLAR LABEL FORM THE LCD DISPLAY WINDOW.

INSTALLATION
2,All installation is normally performed at your thermostat.
ARMCHAIR PROGRAMMING

3,You can program your thermostat before installation by inserting the batteries and
following the instructions starting Feature selector switches .This can be done while
you relax in your favorite chair and is a very good way to familiarize yourself with all the
functions of your thermostat.
The following time and temperature settings are pre-programmed into the thermostat:

Temperature in ˚F (˚C)
Program Number Time Heat Cool

1 6:00 am 68˚F(20˚C) 78˚F(26˚C)
2 8:00 am 60˚F(16˚C) 85˚F(29˚C)
3 4:00 pm 68˚F(20˚C) 78˚F(26˚C)
4 10:00 pm 60˚F(16˚C) 82˚F(28˚C)

OPERATION

4,Your Thermostat is designed to operate with most gas, oil, electric or 2-wire hot water
heating and air conditioning systems. It will also operate single-stage heat pum ps that do
not have auxiliary or emergency heat.
These have 24-volt or millivolt control systems and represent most central heating, air
conditioning, or space heating units in use in the United States.
This Thermostat will NOT control multi-stage heat pumps or 110/220Volt systems.

COMPRESSOR PROTECTION

5,The thermostat provides a 4 minutes delay after shutting of the heating or cooling
system before it can be restarted. This feature will prevent damage to your compressor
caused by rapid cycling. Note that this delay also applies to the heating system control. It
does not provide a delay when there are power outages.

TEMPERATURE RANGE

6,This thermostat can be programmed between 45˚F and 95˚F (7˚C and 35˚C). However,
it will display room temperatures from 30˚Fto 99˚F (0˚C and 37˚C). “HI” will be displayed
if the temperature is higher than 99˚F (37˚C), and “LO” will be displayed if the
temperature is lower than 30˚F (0˚C).
This thermostat will automatically cutoff in Heat mode if the temperature rises above
95˚F(35˚C), and automatically cutoff in Cool mode if the temperature drops below 45˚F
(7˚C).
NOTE: if the thermostat measure a temperature over 99˚F(37℃),”HI” will be displayed
on the LCD. if the temperature is below 32˚F(0℃). and ”LO” will be displayed on the
LCD.

POWER FAILURE

7,Whenever the main power is interrupted or fails, the battery power retains and current
time.

AUTO RECOV ERY

8,Your thermostat is set from the factory to gradually recover the room temperature from
an energy saving program to your comfort program. Therefore, the thermostat may turn
your system on several minutes prior to your programmed the Selector Switche s
information on Selector switches.

POWER SUPPLY

9，The thermostat shall be powered by 24 VAC and with batteries as backup.

BATTERY WARNING

10,Fresh alkaline batteries should provide about one year of service. However, when the
batteries become drained, “BATT” will alternate on the display with the current time.
When this message occurs, install 2 new AAA batteries, You have approximately 1
minute to change the batteries and keep thermostat’s clock and program settings. Once
the batteries have become too low to ensure proper operation, your system will be
turned off, and the display will be cleared except for “BATT” flashing on the LCD display.
CAUTION: Once only the “BATT” only display occurs, the thermostat is shut down, and

your system will no longer operate. In this condition, there is no temperature
control of your dwelling.NOTE: The backlight will not function when the

thermostat is in low battery condition.

NOTE: If you plan to be away from the premises over 30 days, we recommend that
you replace the old batteries with new alkaline batteries prior to leaving.

INSTALLATION

What You Need
This thermostat includes two #8 slotted screws and two wall anchors for mounting. To
install your thermostat, you should have the following tools and materials.

y Slotted Screwdriver(s) y Small Philips screwdriver y Hammer
y Electric drill and 3/16” bit y Two 1.5V (AAA) size alkaline batteries (included)

Remove Old Thermostat

CAUTION: Do not remove any wiring from existing thermostat before reading the
instructions carefully. Wires must be labeled prior to removal.
INPORTANT! Turn off the power to the furnace at the main power panel or at the
furnace.

Remove existing thermostat cover and thermostat. See Figure 1. Some thermostats will
have screws or other locking devices that must first be removed. Once the wall mounting
plate is exposed, look for wires. If wires are not visible, they may be c onnected to the
back of the wallplate. Again, look for screws, tabs, etc. Some models have do ors that
open to expose wires and mounting screws. See Figure 1.

Typical Home Thermostats

Wall mounting Plate Thermostat Cover

Wall mounting Plate Thermostat

Wiring Labeling
y Each wire coming from the wall to the existing thermostat is connected to a terminal
point on that thermostat. Each of these terminal points is usually marked with a code
letter as shown in Table A below.
y Note that this thermostat has multiple function terminals that allow Single-Stage Heat
Pump capability. Standard systems use: RH, RC, G, Y, W. [Single-Stage Heat Pumps
use: R, Y, G, and O or B.] Table A below shows the multiple functions of the terminals.
Use the terminals that match your system.
y The number of wires in your system can be as few as two (for heat only systems), as
many as eight, or any number in between. If you follow the labeling procedures correctly,
you do not have to be concerned about how many wires there are.
y There is often no terminal marking on the existing thermostat of two wire, heat only
systems. Just connect either of the wires to the RH terminal, then connect the other wire
to the W terminal to complete the circuit.

yIMPORTANT! BEFORE DISCONNECTING ANY WIRES, APPLY THE
SELFADHESIVE LABELS PROVIDED TO THE WIRE AS SHOWN IN TABLE A
BELOW.(For example, attach the label marked W to the wire that toes to the W or H

terminal on your existing thermostat.) IGNORE THE COLOR OF THE WIRES since
these do not always comply with the standard.

y After labeling wires, disconnect them from the existing thermostat.
y Remove existing wallplate. To make sure wires do not fall

back into wall opening, you may want to tape them to the wall.
y If hole in wall is larger than necessary for wires, seal this hole
with insulating material so that no hot or cold air can enter the
back of the thermostat from the wall. This air could cause a false thermostat reading.

If the code letter on

your existing
Thermostat is

then mark the wire with

label shown

and connect to

thermostat terminal

shown

Tabl e A

Mount Wallplate and Thermostat

y Remove the wallplate from your
thermostat. See Figure 2.
Figure 2
y Position wallplate on wall and pull
existing wires through large opening.
Then level for appearance. Mark
holes for plastic anchors provided,
if your existing holes do not line up
with those on the wallplate.
y Drill holes with 3/16” bit and gently
tap anchors into the boles until flush
with wall.
y Reposition wallplate to wall, pulling
wires through large opening. Insert
mounting screws provided into wall anchor
and tighten. See Figure 3. Figure3

NOTE: 5- Wire Systems

If your thermostat has one wire marked R or RH (2, 3, or 4-wire system), then leave the
jumper wire between the RH and RC terminals on the wallplate. Otherwise, if you have
separate RH and RC wires (5-wire system), then remove the jumper wire between the
RH and RC terminals.
Connect Wires and Mount Thermostat to Wallplate Figure 5
y Match and connect the labeled wires to the appropriate coded terminal screws on the

wallplate. (See Figure 4, 5) Ignore any wires which may be present, but which were
note connected to the old thermostat.

y Refer to the Wiring Diagrams below to be sure your system is wired correctly.
y Be sure to tighten the terminal screws securely, otherwise a loose wire could cause

operational problems with your system or thermostat.

yPush excess wire back into the hole to prevent interference when installing the

thermostat to the wallplate.

y Make sure the System Switch is set to OFF, and the Fan Switch is set to AUTO.
y If your system is a single stage heat pump and uses an O or B wire, you must move the

System Selector switch inside the thermostat to the Heat Pump position. If you have a
normal furnace or electric system, leave the switch in the Standard position. Refer to the
System Selector section on the back for more information on this switch.
yInsert the tabs on top of the thermostat body into the slots at the top of the wallplate.
Press the bottom of the thermostat body into the snap on the bottom of the wallplate, as
the terminal pins may be damaged. If it does not snap properly, the thermostat may not
work.)
y Insert the two AAA size alkaline batteries, observing the polarity marked inside the
battery compartment.
y Switch on the main power at the panel or furnace.

Selector Switches

In order for this thermostat to control your system, the system type must be specifi ed by
the selector switches on the printed circuit board inside the thermostat. There is also a
selector switch for your choice of Fahrenheit or Celsius temperature display.
yHeating System Selector (HG – HE switch)
The factory position for this switch is in the “HG” position. Leave in thi s position if you
have a gas furnace or an oil burner. If you have an electric furnace, test to see whether
the Heat and Fan come on as expected after installation.If the Fan operation is n ormal,
leave it in the “HG” position. If the Fan does not come on within minute of the thermostat
calling for heating, change the switch position to “HE”. The system selector has no effect
in the cooling mode.
NOTE: “HG” position is for gas and most other systems. “HE” position is for certain
electric systems having a fan relay.

y Furnace or Heat Pump selector (NORMAL-O-B switch)

The factory position for this switch is in the NORMAL position. Leave it in this position if
you have ANY system that uses gas, oil, electric, or hot water heating.
If you have a single-stage Heat Pump (no auxiliary or emergency heat source), the n
slide the switch to the position that matches your Reversing Valve type. If your heat
pump system has a “B” wire, slide the switch to ”B” for your reversing valve that activates
in HEAT mode. If your heat pump system has an “O” wire, slide the switch to “O” for your
reversing valve that activates in COOL mode.

The configuration menu allows you to set certain thermostat operating characteristics to
your system or personal requirements. Set SYSTEM switch to OFF, then simultaneously
press up and down keys 3s to enter configuration menu. The display will show the first
item in the configuration menu. The configuration menu table summarizes the
configuration options. An explanation of each option follows. Press ENER key to change
to the next menu item. To exit the menu and return to the program operation, press
Hold/Run Key. If no keys are pressed within fifteen Seconds, the thermostat will revert to
normal operation.

1) Fast or Slow Crycle Selection

2) Select ℉or ℃ Readout. when you change this parameter .the programming come
back to fault. you have to set the programming again.
Changes the display readout to Centigrade or Fahrenheit as required .

3) Selects time format display 12hours or 24hours.

4) Selects PROG mode for non-program、Weekday/Weekend or 7-DAY.

5) Select Energy Management Recovery OFF or ON .

6) Select 1, all the setting will go back to factory default.
Your thermostat is set from the factory to gradually recover the room temperature from
an energy saving program to your comfort program. Therefore, the thermostat may turn
your system on several minutes prior to your programmed.

Setting Time and Day

Remove the mylar label covering the LCD display window before
operating thermostat.
Press Time button and enter the time setting interface

■ Initial displ ay a fter power-up.
EXAMPLE: Set the Thermostat to the current time of 9:43 a.m. on

Saturday Refer to the Steps below.

STEP 1:

yPress and enter time and day setting mode. The current

hour will be flashing.

yPress up or down to change the Hour up or down to the

current hour.

Note the AM/PM indicator, as the display will change at 12AM

and 12P M.

STEP 2:

y Press again to change from hour setting to minute setting.

The current minute will be flashing.

y Press up or down to change the Minute up or down to the

current minute.

STEP 3:

y Press again to change from minute setting to day setting.

The current days will be flashing.

yPress up or down to change the Day up or down to the

current day.

STEP4:__________________________________________________________

yPress again to change back to the normal display.

Reviewing the Current Temperature Setting

Current time and temperature.

■ Press less than 1 second .

■ Set Temperature is shown above current room temperature

Auto Pro gramming

Studies conducted by the Department of Energy estimate that setting your thermostat
back 10˚F (6℃) for two 8-hour periods during winter can reduce your fuel bill by as much
as much as 33%. By setting your thermostat up 5˚F (3℃) for tow 8-hour periods during
summer you can reduce your fuel bill up to 25%.
Your thermostat is capable of holding up to 4 separate programs for each day of the
week. You can program all weekdays, Monday to Friday, to the same 4 programs as
show in the table, or each weekday can have a different set of 4 programs. Simil arly
weekend programs, Saturday and Sunday, can be the same 4 programs or each
weekend day can have a different set of 4 programs.
Your thermostat is pre-programmed to meet the ENERGY STAR guidelines for energy
efficiency. Note that it is easier to modify these programs than to programs than to
program the thermostat manually.

■ Press once. During Auto Programming, the display

will change as shown.

■ The thermostat will be programmed for all 7 days of

the week as shown below.

Temperature in ˚F/℃

Program Number Time Heat Standard

1 6:00am 68 ˚F (20℃) 78 ˚F (26℃)

2 8:00am 60 ˚F (16℃) 85 ˚F (29℃)

3 4:00pm 68 ˚F (20℃) 78 ˚F (26℃)
4 10:00pm 60 ˚F (16℃) 85 ˚F (28℃)

■ Refer to Manual Programming entering or changing the programs.
PROGRAMMING
Before programming or changing programs, use this Personal Program Schedul e to
determine which times and temperature Settings will best satisfy both your comfort and
energy saving requirements. Use a pencil so you can revise yours records each time
you change your temperature settings.
Heating or Cooling

DAY Program1 Program2 Program3 Program4

Mon. Time

Tem p

Time
Tem p

Time
Tem p

Time
Tem p

Tue. Time

Tem p

Time
Tem p

Time
Tem p

Time
Tem p

Wed. Time

Tem p

Time
Tem p

Time
Tem p

Time
Tem p

Thu. Time

Tem p

Time
Tem p

Time
Tem p

Time
Tem p

Fri. Time

Tem p

Time
Tem p

Time
Tem p

Time
Tem p

Sat. Time

Tem p

Time
Tem p

Time
Tem p

Time
Tem p

Sun. Time

Tem p

Time
Tem p

Time
Tem p

Time
Tem p

NSTALLER/CONFIGURATION MENU

Step

Press
Button

Displayed
(Factory
Default)

Press up or
down key to
select

Comments

1 ENER (SPAN)1 2

SPAN -1(+1F/-1F)

-2(+2F/-1F)

2 ENER (TEMP)F C

Selects temperature display
F or °C

3 ENER (HOUR)12 24

Selects time format display
12hours or 24hours

4 ENER (PROG)1 0，2

Selects PROG mode

0(non-program)、

1(Weekday/Weekend)

or 2(7-DAY)

5 ENER (RECO)OFF ON Auto Recovery select

6 ENER FACT(0) 1, Select 1, all the setting will

go back to factory default

Figure1

W

G

Y

RH

RC

RH

Figure4

RCRCRHGWB/OY/Y1

PROG

DAY

TIME

TIME

TIME

Fan switch: Fan switch for
Automatic or Continuous fan
operation

System switch:Selector switch
for cool,heat, off or auto .

logo

LCD Display shows Time,Day,
Temperature,Program Number,
and other feature information
as required

Temperature Keys:Keys for raising
or lowering temperature setting

Soft touch programming
buttons(see below)

Front Door:
Covers keys
Open with
One finger
up and down

Overrides energy-

saving program
For entering
time set.

Enters Program Mode
for reviewing and changing
weekday, weekend,or daily
programs.

Measures and displays
heating and cooling system
operating time for Today,
Yesterday,This Week,Last
Week,or Total. By monitoring

Selects the day or days to
review or change in Program
Mode.

Provides permanent temperature setting
by overriding stored programs.

Returns display to current
time and temperature.

HOME

TIME ENER

PROG

DAY

PROG

TODAY

temperatures while

you are at home

for the day.

your energy usage, you can
program the thermostat to
optimize energy savings.

HOLD

RUN

Figure5

RH

RC

G

Y/Y1

W

RH,R,
VR or 4
24 Volt

RC,VC,
24 Volt Cool

G or F
Fan

Y,Y1 C or M
(See Note)
Air Conditioning

W or H
Heating

Compressor

Not for heat pumps

O/B

O, B, or R
R ev er sin g V a lve
(Single-stage
Heat Pumps only)

AC24V

AC24V

R

C

C

R

heat

off

cool

system

auto

Manual Programming

■ Your thermostat can be programmed for weekdays and weekends, or have unique
programs for all 7 days. Use Weekday /Weekend Programs or 7-day Programming to
enter or revise programs to match your Personal Program Schedule. The same steps
are used when entering programs for the first time, or revising programs entered du ring
Auto Programming.

■ Familiarize yourself with Manual Programming, so that you can easily modify your
programs as your comfort needs change. The example below demonstrates the Manual
Programming method.

NOTE:

1,The program time can be set in 15-minute increments, and remains the same for both
Heat and Cool programs.
2,The program temperature can be set in increments of 1˚F (1˚C).
3,The Heat setpoint can not be set higher than the Cool set point, and the Cool set point
can not be set lower than the Heat set point.
4,If the system selector is in AUTO mode, the current operating mode will be used for
programming.
5,After 15 seconds without a key press, the thermostat will return to normal display
mode.
6,When setting the program time, note the AM/PM indicator.
7,With the Auto Recovery feature enabled, you do not need to set your comfort program
times early. Auto Recovery will determine how early Recovery will determine how early
to turn your system on, so that the room is comfortable at the program time.
8 .”PROG”,”PROG DAY” ,”HOME TODAY”keys do not work with non-program mode.

Weekday/Weekend Programming
Step 1

■Slide System Selector Switch to HEAT or
COOL to program the corresponding system.
NOTE: If the system selector is in the OFF position, no programming
is permitted. The LCD display will show only dashes when the
program key is pressed.

Step 2 ■ Press and enter program mode,

Display shows weekday programs and Program
hour are flashing .

■ Display for HEAT mode shown.

Step 3 .Use and to change the hour.

.
Step 4 Press PROG again to change the minute position ,the

current minute will be flashing.

Step 5 . Use and to change the minute.

Step6 Press PROG again to change the progra m temperature,

the current program temperature will be flashing.

Step 7 Use and to change the temperature.

Step 8 ■Press to change to the weekend program.

■Repeat Step 3 and 6 to complete the
weekend programs.

Step 9 ■Press it to enter normal mode or after 15 seconds, the thermostat will

return to normal mode automatically.

Step 10 ■ Change the System Selector S witch to the other system. And

repeat Step2 through 9 above.

7-DAY Programming

Step 1 ■ Slide System Selector Switch to HEAT or

COOL to program the corresponding system.

Step 2 ■ Press it to enter program mode, display shows

Monday programs and Program hour are flashing.

Step 3 .Use and to change the hour.
.
Step 4 Press PROG again to change to the minute position, the

current minute will be flashing.

Step 5 .Use and to change the minute.

Step6 Press PROG again to change to the pro gram temperature

Step 7 .Use and to change the temperature.

Step 8 ■Press it to change the next program number.

■Repeat Step 3 and 6 to complete the remaining Weekday and

Weekend programs.

Step 9 ■Press it to normal mode or after 15 seconds, the thermostat will return

to normal mode automatically.

Step 10 ■ Change the System Selector S witch to the other system. And

repeat Step2 through 9 above.

Reviewing Programs

You may want to review the programs to confirm that the settings are compatible with
your lifestyle.

Use and to review the programs.

NOTE: Programs take affect as soon as the thermostat returns to normal mode.
If you are armchair programming the thermostat, slide the system selector
to the OFF position before mounting the thermostat to the wall plate.

Reviewing the Current Temperature Setting

Current time and temperature.

■Press it for 1 second or less.

■Set Temperature is shown above current room temperature.

OPERATION
System Selector Switch

The System Selector Switch on the front of the thermostat determines
the Operating mode of the thermostat. You may select COOL ,OFF ,
HEAT, AUTO. In order to take full advantage of this thermostat’s
feature, we recommend using the AUTO mode. Refer to the Auto Season Changeover
information on Auto Season Changeover.
NOTE: Anytime you install or remove the thermostat form the wallplate, slide the System
Selector to the OFF position to prevent the possibility of a rapid system On-Off.

Fan Switch

The Fan switch should normally be located in the AUTO position. The Fan
will be turned on along with normal operation of your system. In a normal
gas or oil furnace, the Fan will be turned on by your furnace after its warm-up
delay. For electric heat, air conditioning, and heat pump operation, the Fan will turn on
with the system. To run the Fan on continuously, slide the Fan switch to the ON position.

Temporary Manual Override

To temporarily change the current set temperature without affecting your program:

■Press and hold or for less than 1 second to enter Manual Override
mode..

■Press and to change to your desired new temperature.

■Press to normal mode or wait 15 seconds for it to return automatically.

■The current program number will flash to signify the Temporary Override.

At the next program change, the Temporary Override is canceled, and the
next program temperature becomes the setpoint temperature.

To end the Tempor ary Manual Override:

■Press and wait for HOLD display on the LCD

■Press HOLD/RUN key twice. This will return the set temperature to the current

program set temperature.

Permanent Override or a Designated Day Override

To hold your Manual Override for vacation or Until a Designated Day

■ Press it to make the current program temperature the HOLD

temperature. HOLD will be displayed on the LCD and the

Program number will disappear.

■ Follow the Temporary Manual Override instructions above

to change the Permanent Manual Override temperature.

■You can confirm the held set temperature by pressing for

less than 1 second.

■ Press again. Hold day will be displayed on the LCD and the

clock will disappear.

■Press TIME key to add override days. Press PROG key to

reduce o verride da ys.

■Follow the a Designated Day Override instructions above to change the

Permanent Manual Override temperature.

To end Override:

yUnder Permanent Override Press HOLD/RUN key twice. Under a Designated Day

Override press the HOLD/RUN once. The thermostat will return to the current program,

and the HOLD display will be canceled.

Auto Season Changeover

When the System Selector is in AUTO position , the thermostat will automatically change
between Heating and Cooling systems, depending on your program. We recommend
keeping your programmed heating and cooling temperature at least 4˚F (2˚C) apart to
allow the Auto Season Changeover to occur when the appropriate temperature span has
been reached. However, if your heating and cooling programs set temperatures are
close, there is a built-in program to prevent the thermostat is in Temporary, a Designated
Day Override or Permanent Override, as these overrides are energy saving settings.
Auto Season Changeover will still function in Home Today mode, as this is a comfort
setting.
For example, you may have the following temperatures programmed at a given time:
Heat Set Temp=68˚F, Cool Set Temp=78˚F
If the room temperature rises above 78˚F, then the thermostat will automatically change
to cool mode and turn on the air conditioner.
Likewise, the thermostat will automatically change to heart mode and turn on heat when
the room temperature falls below 68˚F.

HOME TODAY

This patent pending feature allows you to quickly and Temporarily Override your energy
saving program setting on days when you are normally away from home with one key
press.

■Press and enter the Home Today override .The highest
program temperature for today will be selected from your
programs in Heat mode and become the set temperature.(In
Cool mode ,Home Today will select the lowest program
temperature for today to be the set temperature.)

■The display will alternate between “HOME” and the current
time.

■When pressed during the day, the thermostat will remain in Home Today mode
until the first program of the next day.

■If the system is changed between Heat and Cool modes (either manually or b y
Auto Season Changeover) during the “Home Today” override period, the setpoint
temperature will be automatically update. It will automatically change from the lowest
cool program setpoint to the highest heat program setpoint.

■Press it and exit Home Today mode before the schedule ending time. ”HOME”

is no longer displayed on the LCD screen, and the thermostat returns to t he
current program.

■You can manually change the set point temperature while in Home Today mode.

Refer to the Temporary Manual Override instructions .Manually changing the set
temperature while in Home Today mode will not affect the Home Today ending
time, However, the set temperature will not change automatically with a manual
or Automatic change between heating and cooling.

Energy Monitor

■The Energy monitor feature measures and stores the amount

of time the heating and air conditioning system operates. Usage
can be display for Today (since 12 am), Yesterday, This Week
(since Monday), Last Week (last Monday through Sunday), and
Total (up to 999 Hrs). By monitoring your energy usage, you see
how much the set-back periods are saving, and you can test
program adjustment to save even more. To review energy usage, press to cycle
through Today, Yesterday, this Week, Last Week, and Total. Press again to return
to normal mode, or wait 15 seconds for the display to return to normal mode .You
can also return to normal mode at any time by pressing HOLD/RUN.

■For example: This LCD display shows Today’s usage to be 10 Hours, 26

minutes

■Press and hold for 3 seconds to reset the Energy Monitor’s counters.

The display will blink, and counters will be cleared to zero.
NOTE: Clearing the Energy Monitor counter will also clear the Filter Monitor counter , as
Filter usage and Total Energy usage are the same. Also, clearing the filter Monitor
counter will clear ALL Energy Monitor counters as well.

Filter Monitor

Your thermostat also keeps a record of the number of hours your
filter has been in use. To maximize your system’s performance and
energy efficiency, change or clear your filter regularly.

■When the total system run time for heat and cool reaches 400
hours, you to clean or change your system’s filter, “FILT” will
continue to flash until the counter is set back to zero.

■Press to review total filter usage. After 15 seconds, the
display will return to normal mode, or you can hit

HOLD/RUN to exit immediately.
The Filter Monitor will display up to 999 hours and 59 minutes of
usage. In this example, the counter is at 410 Hours, 26 minutes.

■To reset the Filter Monitor counter, depress ENER for 3 seconds. The display will blink,
and the counter will be reset to zero.
NOTE: Clearing the Filter Monitor counter will also clear ALL Energy Monitor counters,
as Filter usage and Total Energy usage are the same. Also, clearing the Energy Monitor
counters will clear the Filter Monitor counter as well.

Auto Reco very

Auto Recovery calculates how early to turn your system back on, so that the room
temperature is already comfortable by the start of the comfort temperature program
period. Auto Recovery work’s in both Heat and Cool modes.
yWhen the thermostat is in Auto Recovery mode, the display will
alternate “RECO” with time, and the program indicator will flash.
yAuto Recovery can be disabled by sliding the Recovery switch on
the circuit board to disable.
yAuto Recovery will not operate if Permanent hold or Temporary
hold is in operation.
yAuto Recovery can be canceled manually if HOLD is pressed during the recovery
process.
yAuto Recovery will be canceled and change to next period.

Details of Auto Recovery Operation:

■Auto Recovery can be disabled by sliding the Recovery switch on the circuit board to
the DISABLE position.

■Today is in operation.

■Auto Recovery can be canceled manually if HOLD/RUN is pressed during the

recovery process. If a recovery process is canceled manually then the recovery

process will not start again until the next program period starts (an exception is that if
time or program is changed then the thermostat will check Auto Recovery conditions
immediately).

■Auto Recovery will be canceled and change to Home Today mode if HOME TODAY is
pressed during the recovery process.

Backlighting

Your thermostat has an electroluminescent lamp that backlights the display for easy
viewing in the dark.
When any key is pressed the display is illuminated.
The display will remain illuminated for 8 seconds after the last key is pressed. This
allows the light to stay on if you need to operate several keys.
NOTE: If the thermostat is in Low Battery warning condition, the backlight will not
operate. Replace with 2 new AAA alkaline batteries to restore the Backlight function.

Low Battery Warning

Your thermostat has a two-stage lower battery warning system. When
the batteries are first detected to be weak, the first stage low battery
warning is indicated by“ BATT” flashing on the LCD display. At your
earliest convenience, you need to replace the batteries with 2 new
AAA alkaline batteries.
When the batteries become too week for normal operation, the
thermostat enters the second stage low battery warning which shuts
down the thermostat. In this condition, “BATT” flashes alone on the
display, and the thermostat will turn your system Off. Your system will
remain shut-off until the batteries are replaced.
NOTE: The thermostat will still keep the current Set Temperature
and Filter run time in memory until new batteries are installed. After confirming that ne w
batteries have been inserted, the thermostat will return to normal
operation.

Error Mode

If the thermostat is unable to control your system due to an unexpected
battery problem, the thermostat will enter Error Mode. In this condition,
the thermostat flashes “E1”or “E2”on the LCD display, and shuts off
your system. To correct this problem, replace the batteries with 2 new
AAA alkaline batteries, even if you have recently replaced them. Move
the battery out, and then hold any key to release the rest energy. Then
place the battery again. You will need to reprogram your thermostat
and confirm normal operation.

If Error Mode returns, please call us for further information.

LCD dis

play

Information LCD displa

y

Information

E1 Sensor Erro

r

E2 System switch

Auto Cut Off

Your thermostat will automatically cutoff in Heat mode if the room temperature rises
above 95˚F (35˚C). It will cut off in Cool mode if the room temperature drops below
40˚F (4˚C).
Note that if your system has malfunctioned and no longer responds to thermostat
controls, the Auto Cut-Off will have no effect.

Wiring Diagrams

TROUBLESHOOTING

Problem

Solution

SCRAMBLED OR
DOUBLE DISPLAY
(numbers over
numbers)

1. Remove clear mylar sticker.

NO DISPLAY 1. Check battery conn ections and batteries

2. Move the battery out, and then hold any key to release
the rest energy. Then place the battery again.

ENTIRE DISPLAY
DIMS

1. Replace Batteries

PROGRAM DOES
NOT CHANGE AT
YOUR DESIRE
SETTING

1. Check that the time is set properly to “AM” or “PM”

2. Check that the thermostat is not in “HOLD” or“ Home
Today” mode.

3. Check for the correct day settings.

AUTO/FAN DOES
NOT TURNON

1. Move HG/HE selector to opposite position is in the

correct position (“HEAT,”COOL” or “AUTO”)

2. The thermostat may be in the AUTO Mode. Look for”

AUTO” on the LCD display. If the Heat and Cool program
temperature are close, then the thermostat requires a
larger room temperature change before changing from
Heat or Cool.

3. There may be as much as 4 minute delay before the

Heat or Cool system turns On-wait and check.
(Compressor protection delay).
4，Check your circuit breaks and switches to ensure there
is power to the system.

5. Replace batteries.

6. Make sure your furnace blower door is closed properly.

7. If your system only uses 4-wires, be sure the jumper

wire is installed between the RC and RH terminals.

8. Check the position of the Furnace or Heat Pump selector

switches: Normal/O/B.

ERRATIC DISPLAY 1. Move the battery out, and then hold any key to release

the rest energy. Then place the battery again.

IF UNIT
CONTINUES
TO OPERATE IN
THE OFF
POSITION

1. Replace unit

THERMOSTAT
PERMANENTLY
READS“HI”, “LO,”
OR “ERR-” AFTER
PRESSING
TER PRESSING

1. Replace unit.

heat

off

cool

system

auto

heat

off

cool

system

auto

on

auto

fan

heat

off

cool

system

auto

HOLD

RUN

HOLD

RUN

HOME
TODAY

PROG

ENER

PROG

DAY

PROG

PROG

PROG

DAY

HOLD

RUN

HOLD

RUN

HOLD

RUN

HOLD

RUN

PROG

DAY

heat

off

cool

system

auto

HOLD

RUN

RC

RH

G

Y

THERMOSTAT

O/B

RC

120V
AC

THERMOSTAT

120V
AC

THERMOSTAT

120V
AC

THERMOSTAT

120V
AC

THERMOSTAT

120V
AC

THERMOSTAT

120V
AC

RC

RH

G

Y

O/B

RC

RC

RH

G

Y

O/B

RC

RC

RH

G

Y

O/B

RC

RC

RH

G

Y

O/B

RC

RC

RH

G

Y

O/B

RC

ENER

ENER

HOLD

RUN