Comfort Stat CP2020 User Manual

Program Thermostat Owners Manual
ModeCP2020

LCD Display:Shows
Time,Day,Temperature,
Program Number,and
other feature information
as required.

Temperature Keys: Keys for
raising or lowering trmperature
setting.

Reviews filter usage
in hours and minutes.
Also resets filter
counter to zero.

L

Battery C ompartment:
Front access allows
easy insertion of two
AA 1.5V batteries.

Front Door:
Battery cover
Open with one
finger from top.

FEATURES

buttons (see below)

Structure of thermostat and explanation for the keypads

Overrides energy­saving program
temperatures whi le
you are at home
for the day.

Measures and displays
heating and cooli ng system
operating ti me for Today,
Yesterday,This Week,Last
Week,or Total. By moni toring
your energy usage, y ou can
program the ther mostat to
optimize energy savi ngs.

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

Read This Before Installing Thermostat
IMPORTANT
1, Read the entire installation section of this Owner’s Manual thoroughly before 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

Automaticall y programs the
thermostat to i ts built-in
ENERGY STAR compliant
program setti ng.

For entering
hour of day.

HOME

TODAY

ENER

R

system

cool

heat

off

auto

Front Door:Covers keys Open with one finger from left or right.Soft touch programming

For entering
minute of day.

PROG

DAY

HOLD

CLEAR

DAY

HOUR MIN

AUTO
PROG

Selects the day or days to
review or change i n Program
Mode.

Fan Switch: Fan

fan

switch fo r Automatic
or Continuous fan

auto

on

operation.

System Switch:
Selecto r switch for
Cool,O ff,Heat or auto.

For entering day of week.

Enters Program Mode
for reviewin g and changing
weekday, weekend,or daily

PROG

programs.

RUN

Returns displa y to current

time and temperatur e.
Provides permanent temperature sett ing
by overriding st ored programs. It also
returns the ther mostat to current program
control from man ual override or Home
Today mode.

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 pumps 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

This thermostat can be programmed between 45˚F and 95˚F (7˚C and 35˚C). However, it
will display room temperatures from 30˚F to 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: The thermostat will automatically change to the Cool mode if the thermostat
measure a temperature over 99˚F(37℃), ”HI” will be displayed on the LCD, and the
Cooling system will turn On. Similarly, the thermostat will automatically change to the
Heat mode if the temperature is below 32˚F(0℃). and ”LO” will be displayed on the LCD,
and the Heating system will turn On.
POWER FAILURE
7, Whenever the main power is interrupted or fails, the battery power retains and current
time.
AUTO RECOVERY
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 Switches
information on Selector switches
BATTERY WARNING
9,Fresh alkaline batteries should provide over 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 AA 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 Two1.5V (AA) size alkaline batteries (included)

Remove Old Thermostat

CAUTION: Do not remove any wiring from existing thermostat before r eading 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 connected to the
back of the wallplate. Again, look for screws, tabs, etc. Some models have doors that
open to expose wires and mounting screws. See Figure 1.

Typical Home Thermostats

Wall mounting Plate Thermostat Cover

Figure

1

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
latter 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.

y IMPORTANT! 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

RH

G

W

RC

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

RH,R,
VR or 4
24 Volt

RC,VC,
24 Volt C ool

G or F
Fan

Y,Y1 C or M
(S ee N ote )
Air Conditioning
C om pressor

W or H
Heating
Not for heat pum ps

O , B , o r R
Reversing V alve
(S ingle-stage
Heat Pum ps only)

Tab l e A

then mark the wire with

label shown

and connect to

thermostat terminal

shown

RH

RC

G

Y/Y1

W

O/B

NOTE: Do not connect a “Common” wire (sometimes labeled “C”) to any terminal on this
thermostat. Tape up the wire and do not use. This wire provides electricity to non-battery
powered thermostats.

Mount Wallplate and Thermostat

Figure 2

y Remove the wallplate from your
thermostat by pressing the release
tab on the bottom of the thermostat.
See 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. Figure3

R

C

Y

/Y

1

R

W

H

OB

G

screws provided into wall anchor and tighten. See Figure 3.

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.

Figure4

RH

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.

y Push 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 AA 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 specified 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.
y Heating System Selector (HG – HE switch)
The factory position for this switch is in the “HG” position. Leave in this 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 normal,
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), then
slide the switch to the position that

O

K3

(NORMAL-O-B SWITCH)

B

NORMAL

SYSTEM SETTING

NAME

ALTERNATE

* STANDAND

F/C

CELSIUS

FAHRENHEIT

12/24

24 HOURS

12 HOURS

SPAN

+2F/-1F

+1F/-1F

RECOVERY

DISABLE

ENABLE

* DEFAULT SETTING

HG HE

(HG-HE SWITCH)

CELSIUS

(+2F/-1F)

24 HOURS

DISABLE

K2

JP1

1234

12 HOURS

FAHRENHEIT

SPAN (+1F/-1F)

RECOVERY ENABLE

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.

Feature Selector Switches:

y F˚ / C˚ selector (Fahrenheit / Celsius)

Your thermostat is set for F˚ mode from the factory. In order to change to C˚ mode, slide
the switch to C˚ and Move the battery out and wait for about 1 minute then place the
batteries .

NOTE: Unless press any key about 2 seconds without the battery, then place the battery
again. the thermostat will not change temperature mode. All progra ms and settings will
be lost..

I 12Hr. / 24 Hr. selector
Your thermostat is set from the factory in normal 12 (AM/PM) time format. To change to
24 hour (military) time, slide the Switch to the 24 position. This change may be made
without resetting the thermostat, and will automatically change the current time display
and all program times in memory.
Span selector –Switch 7
Your thermostat is set temperature. If you require slower temperature cycles in Heat
mode, you can select +2˚F/-1˚F by sliding the switch to the ALT position. This may be
necessary if your heating system cycles too rapidly.

Auto Recovery select

Your thermostat is set from the factory with the Auto Recovery Feature enabled , If you
prefer to use normal recovery, slide the switch to the ALT position.
Table B below summarizes the Feature Switches discussed above. A similar table is
printed directly on the circuit board for your quick reference.

Switch Setting

Function Alternate Standard

˚F/ Celsius Fahrenheit

12Hr. / 24 Hr. 24 Hour 12 Hour

Span +2˚F/-1˚F +2˚F/-1˚F

Auto Recovery Disable Disable

Setting Time And Day

Tab l e B

Remove the mylar lable covering the LCD display window before operating thermostat.

■ Initial display after power-up. The temperature will

update after a few seconds.
EXAMPLE: Set the Thermostat to the current to the current time of
9:43 a.m. on Saturday Refer to Figure at right

■ During time and day setting mode , the temperature

HOUR

and program display will go blank.

■ Press and hold to rapid advance to the current hour.
Tap to advance one hour at a time. Note the AM /PM

MIN

indicator, as the display will cycle through 24 hours.

■ Press and hold to rapid advance to the current hour.
Tap to current minute. Tap to advance one minute at

DAY

a time.

■ Tap to advance one day at a time.

■ When finished, press to RUN to the Normal time and

RUN

temperature display or
wait 15 seconds for it to return to Normal mode automatically.

Auto Programming

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 perids 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. Simillarly
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

AUTO

display will change as shown.

PROG

■ 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 4:00am 68 ˚F (20℃) 78 ˚F (26℃)

4 10:00am 60 ˚F (16℃) 85 ˚F (29℃)

■ Refer to Manual Programming entering or changing the programs.

PROGRAMMING

Before programming or changing programs, use this Personal
Program Schedule 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

DAY Program1 Program2 Program3 Program4

Mon. Time

Tem p

Tues. Time

Tem p

Wed. Time

Tem p

Thurs. Time

Tem p

Fri. Time

Tem p

Sat. Time

Tem p

Sun. Time

Tem p

Time

Tem p

Time

Tem p

Time

Tem p

Time

Tem p

Time

Tem p

Time

Tem p

Time

Tem p

Time

Tem p

Time

Tem p

Time

Tem p

Time

Tem p

Time

Tem p

Time

Tem p

Time

Tem p

Time

Tem p

Time

Tem p

Time

Tem p

Time

Tem p

Time

Tem p

Time

Tem p

Time

Tem p

Cooling

DAY Program1 Program2 Program3 Program4

Mon. Time

Tem p

Tuse. Time

Tem p

Wed. Time

Tem p

Thurs. Time

Tem p

Fri. Time

Tem p

Sat. Time

Tem p

Sun. Time

Tem p

Time

Tem p

Time

Tem p

Time

Tem p

Time

Tem p

Time

Tem p

Time

Tem p

Time

Tem p

Time

Tem p

Time

Tem p

Time

Tem p

Time

Tem p

Time

Tem p

Time

Tem p

Time

Tem p

Time

Tem p

Time

Tem p

Time

Tem p

Time

Tem p

Time

Tem p

Time

Tem p

Time

Tem p

Manual Programming

■ Your thermostat can be programmed for weekdays and weekends , or have unique
programs for all 7 days .Use Weekday /Weekend Programs below 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 during 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: The program time can be set in 10 minute increments, and remains the same for

both Heat and Cool programs. 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.

y

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.

Weekday/Weekend Programming
Step1

■ Slide System Selector Switch to HEAT or
COOL to program the corresponding system.
NOTE: If the system selector is in the OFF position, no

system

cool

heat

auto

off

Programming Your Thermostat (Continued)

Permanent Override or a Designated Day Override

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

programming is permitted. The LCD display will show only dashes
when the program key is pressed.
Weekday/ Weekend Programming (cont.)

■ Press PROG key to enter program mode,

Step2

PROG

display shows weekday programs.

■ Display for HEAT mode shown.

Step3 Use and to change the set point time.

HOUR

MIN

Use and to change the set point temperature.

y You can confirm the held set temperature by pressing for less than 1 second.

y Press again. Hold day will be displayed on the lcd and the clock

will disappear

yPress Day key to add override days. Press Program key to

Step4 ■ Press to move to programs 2,3 and 4.

■Repeat Step3 to complete the weekday

programs.

PROG

Step5 ■ Press to change to the next day’s programs.

DAY

■Repeat Step 3 and 4 to complete the weekend programs

.

RUN

Step6 If you desire only weekend and weekday programs, press to RUN to

normal mode.

■ After 15 seconds, the thermostat will return to normal

mode automatically.

system

Step7 ■ Change the System Selector Switch to the other system. And

cool

heat

off

repeat Step2 through 6 above.

auto

7-DAY Programming

system

Step1 ■ Slide System Selector Switch to HEAT or

COOL to program the corresponding system.

cool

heat off

Step2 ■ Press to enter program mode, display shows

auto

weekday programs.

PROG

Step3 Use and to change the setpoint time.

DAY

HOUR

MIN

Use and to change the setpoint temperature.

Step4 ■ Press to move to programs 2, 3 and 4.

PROG

■ Repeat Step 3 to complete the programs for Monday.

Step5 ■ Press to change the next day’s programs.

Step6 ■ When finished press to return to normal mode.

PROG

DAY

RUN

■ Continue repeating Step3,4 and 5 to

program all 7 days of the week.

To end Override:

yUnder Permanent Override Press hold/return key twice. Under a Designated Day

Override press the hold once. The thermostat will return to the current program, and the

HOLD display will be canceled.
NOTE: The Auto Season Changeover feature will not operate while the thermostat is in
permanent Manual Override .Refer to the Auto Season Changeover feature for more
information.

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.

PROG

After 15 seconds, the thermostat will return to

normal automatically.

7-Day Programming (continue)

s

stem

Step 7 ■ Change the System Selector

cool

heat

auto

off

Reviewing Programs

You may want to review the programs to confirm that the settings are
compatible with your lifestyle.
Weekday Programs ■ Press to display M-F programs.

PROG

Switch to The other system,
and repeat 2 through 6 above.

Auto Season Changeover) during the “Home Today” override period, the setpoint
temperature will be automatically update.It will automatically change from the highest
heat program setpoint to the highest heat program setpoint .

Press repeatedly to cycle through the 4 programs.

Weekend Programs ■ Press to display the Sa-Su
programs.

■ Press repeatedly to cycle through the 4

PROG

DAY

PROG

Daily Programs ■Press to display M-F programs.
NOTE: Time and Temperature display will be blank when at least
one weekday program is different.

■ Press to change to Sa-Su. Again, if the display is blank , one

PROG

DAY

of the weekend programs is different.

■ Press again to change to Monday’s program.

PROG

Continue pressing to cycle through each day.

Energy Monitor

■ Press repeatedly to cycle through the 4 programs.

■ Press to return to normal mode.

RUN

After 15 seconds, the thermostat will return to normal mode. automatically .
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.

■ Thermostat is set to AUTO , and the heating system is

on.

■ Press 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 ,

system

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..

cool

heat

auto

off

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

fan

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

auto

on

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 RUN to normal mode, or wait 15 seconds for it to return

RUN

automatically.

■ The current program number will flash to signify the Temporary Override.
At the next program change, the Temporary Override, and the next program
temperature becomes the set point temperature. To end the Temporary
Manual Override:

HOLD

CLEAR

■ Press and wait for HOLD to display on the LCD.

■ Press hold key. This will return the set temperature to the current program

set temperature.

NOTE: The Auto Season Changeover feature will not operate while the thermostats is

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 500
hours, you to clean or change your system’s filter, “FILT” will
contunre to flash until the counter is set back to zero.

■ Press to review total filter usage. The display will blink “FILT”
Then show the filter Monitor counter. After 15seconds, the display
will return to normal mode, or you can hit RETURN 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 FILTER 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 Recover y

Auto Recovery calculates how early to turn you 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/RETURN is pressed during the

recovery process.
yAuto Recovery will be canceled and change to next period.

Details of Auto Recovery Operation:

in Temporary Manual Override .Refer to the Auto Season Changeover feature for more
information.
NOTE; If the thermostat has not been programmed, then a Temporany Override
becomes a Permanent Override. See the next section for more information.

HOLD

y Press to make the current program temperature the

CLEAR

HOLD temperature. HOLD will be displayed on the LCD,

and the Program number will disappear.

y Follow the Temporary Manual Override instructions

above to change the

Permanent Manual Override temperature.

reduce override days

HOLD

CLEAR

y Follow the Temporary a Designated Day Override instructions above to

change the Permanent Manual Override temperature.

DAY

HOUR

■ Press to enter the Home Today override .The highest program temperature for
today will be selected from your programs in Heat mode

HOLD

and become the set temperature.(In Cool mode ,Home

CLEAR

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

HOME
TODAY

until the first program of the next day.

■If the system is changed between Heat and Cool modes (either manually or by

■ Press to exit Home Today mode before the schedule ending time. “Home

Today” override period, the setpoint temperature will be automatically updated. It
will automatically change from the lowest cool program setpoint to the highest
heat program setpoint.

■ Press to exit Home Today mode before the schedule ending time.”HOME” is no
longer displayed on the LCD screen, and the thermostat returns to the current
program.

■ You can manually change the setpoint 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.

■ 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

ENER

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 RERURN.

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

ENER

■ Press and hold for 3 seconds to reset the Energy Monitor ’s counters.
The display will blink, and counters will be cleared to zero.

■ Auto Recovery can be disabled by sliding the Recovery switch on the circuit board

to the ALT position.

■ Today is in operation.

■ Auto Recovery can be canceled manually if HOLE/CLEAR 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.

Keyboard lock

The keyboard can be locked to prevent unauthorized changes to the thermostat.

■ To lock or unlock the keyboard, press and hold BOTH the
Keys for 3 seconds. The keyboard is locked when LOCK appears
on the display.

■ All keys are locked, Any time a key is pressed, LOCK will appear
on the display for 1 second.

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 AA 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
battery symbol flashing on the LCD display. At your earliest
convenience, you need to replace the batteries with 2 new AA
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 new 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 AA alkaline batteries, even if you have recently replaced them.
Move the battery out hold any key 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.

Auto Cut Off

Your thermostat will automatically cutoff in Heat mode if the room temperature rises
above 95˚F (35˚C). It will cutoff 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.

THERMOSTAT

RH

THERMOSTAT

G

O/B

Y

RC RH

G

O/B

Y

Wiring Diagrams

RC

THERMOSTAT

RC

RH

G

O/B

Y

THERMOSTAT

RC

RH

G

O/B

Y

THERMOSTAT

RC

RH

G

O/B

Y

THERMOSTAT

RC

RH

G

O/B

Y

TROUBLESHOOTING

Solution

Problem

SCRAMBLED OR

1. Remove clear mylar sticker.
DOUBLE DISPLAY
(numbers over
numbers)

NO DISPLAY 1. Check battery connections and batteries

2. Move the battery out hold any key then place. The

battery again.

ENTIRE DISPLAY
DIMS

PROGRAM DOES
NOT CHANGE AT
YOUR DESIRE
SETTING

1. Replace Batteries

1. Check that the time is set properly to “A M” or “P M”

2. Check that the thermostat is not in “HOLD” o r“ Home

Today” mode.

3. Check for the correct day settings.

AUTO/FAN DOES
NOT TURN ON

GO

ON OR OFF

1，Move HG/HE selector to opposite 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.

is in the correct position

Problem (cont.) Solution (cont.)

ERRATIC DISPLAY 1. Move the battery out hold any key then place the battery

again.

IF UNIT CONTINUES
TO OPERATE IN

1. Replace unit

THE OFF POSITI ON

THERMOSTAT
PERMANENTLY

1. Replace unit.

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

If you experience any other problems, call us for technical assistance.

The service number is 1-866-591-9898