Programmable Thermostat Owner
’s Manual
Model:CT100
FEATURES
Structure of thermostat and explanation for the keypads
We are pleased you have selected one of our broad line of wall thermostats. Our
products are manufactured to high quality standards and are designed for years of
service.
Read This Before Installing Thermostat
OPERATION
YOUR THERMOSTAT REPLACES
Description
CT100
Heat Pump (No Aux. or Emergency Heat)
Yes
Heat Pump (with Aux. or Emergency Heat)
Yes
Standard Heat & Cooling Systems
Yes
Two Stage Heat & One Stage Cool
Yes
Standard Heat Only Systems
Yes
Millivolt Heat Only Systems
– Floor or Wall Furnaces
Yes
Standard Central Air Conditioning
Yes
Gas or Oil Heat
Yes
Electric Furnace
Yes
Hydronic (Hot Water) Zone Heat-2 Wires
Yes
Hydronic (Hot Water) Zone Heat
–3 Wires
No
This Thermostat will NOT control 110/220Volt systems.
IMPORTANT
1
.
Read the entire installation section of this Owner
’s Manual thoroughly before you
begin to install or operate your Thermostat.
This thermostat can be used for conventional or heat pump systems.
Please configure the thermostat according to Configuration Menu
before operation.
REMOVE THE MYLAR LABEL FROM 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 at the configuration menu. 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)
COMPRESSOR PROTECTION
4. The thermostat provides a 4 minute 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. You can select the function on
or off at the configuration.
TEMPERATURE RANGE
5. 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 shut off in Heat
mode if the temperature rises above 72
˚F (22˚C), and automatically shut off in Cool
mode if the temperature drops below 75
˚F (24˚C).
NOTE: If the thermostat measures 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
6. Whenever the main power is interrupted or fails, the battery power retains the
current time. This thermostat has permanent memory, although you will have to reset
your clock when there are power outages.
POWER SUPPLY
7. The thermostat shall be powered by 24 VAC and with batteries as backup.
BATTERY WARNING
8. 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 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:
When 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.
■ Slotted Screwdriver(s) ■ Small Philips screwdriver ■ Hammer
■ Electric drill and 3/16” bit ■ Two 1.5V (AA) size alkaline batteries (included)
CAUTION:
To prevent electrical shock and/or equipment damage, disconnect electric power
to system at main fuse or circuit breaker box until installation is complete.
Before removing wires from old thermostat's switching subbase, label each wire with the
terminal designation it was removed from.
1. Shut off electricity at the main fuse box until installation is complete. Ensure that
electrical power is disconnected.
2. Remove Old Thermostat: A standard heat/cool thermostat consists of three basic
parts:
a. The cover, which may be either a snap-on or hinge type.
b. The base, which is removed by loosening all captive screws.
c. The switching subbase, which is removed by unscrewing the mounting screws that
hold it on the wall or adaptor plate.
3. Remove the front cover of the old thermostat. With wires still attached, remove wall
plate from the wall. If the old thermostat has a wall mounting plate, remove the
thermostat and the wall mounting plate as an assembly.
4. Identify each wire attached to the old thermostat.
5. Disconnect the wires from the old thermostat one at a time. DO NOT LET WIRES
FALL BACK INTO THE WALL.
6. Install new thermostat using the following procedures.
WARNING
Do not use on circuits exceeding specified voltage. Higher voltage will damage
control and could cause shock or fire hazard. Do not short out terminals on gas
valve or primary control to test. Shorts or incorrect wiring will damage the
thermostat and could cause personal injury and/or property damage.
Selector Switches
Electric/Gas Switch (Fan Option)
Figure 1. Electric/Gas Switch (Fan Option)
This thermostat is configured from the factory to operate a heat/cool, fossil fuel (gas, oil,
etc.), forced air system. It is configured correctly for any system that DOES NOT require
the thermostat to energize the fan on a call for heat. If you system is an electric heat or
heat-pump system that requires the thermostat to turn on the fan on a call for heat,
locate the ELEC/GAS switch on the back of the thermostat (see fig. 1) and switch it to
the ELEC position. This will allow the thermostat to energize the fan immediately on a
call for heat. If you are unsure if the heating/ cooling system requires the thermostat to
control the fan, contact a qualified heating and air conditioning service person. When the
thermostat is configured for Heat Pump, the thermostat will always power the circulator
fan on a call for heat in the HEAT mode. The ELEC/GAS switch must be set to match the
type of Auxiliary heat your system uses for proper operation in the EMERgency mode.
All wiring diagrams are for typical systems only. Refer to equipment ma
nufacturers’
instructions for specific system wiring information.
Attach Thermostat Base to Wall
1. Remove the packing material from the thermostat. Gently pull the cover straight off the
base. Forcing or prying on the thermostat will cause damage to the unit.
2. Connect wires beneath terminal screws on base using appropriate wiring schematic
(see figs. 2 through 4).
3. Place base over hole in wall and mark mounting hole locations on wall using base as
a template.
4. Move base out of the way. Drill mounting holes.
5. Fasten base loosely to wall, as shown in fig. 1, using two mounting screws. Place a
level against bottom of base, adjust until level, and then tighten screws. (Leveling is for
appearance only and will not affect thermostat operation.) If you are using existing
mounting holes, or if holes drilled are too large and do not allow you to tighten base
snugly, use plastic screw anchors to secure base.
6. Push excess wire into wall and plug hole with a fireresistant material (such as
fiberglass insulation) to prevent drafts from affecting thermostat operation.
Figure 2. Thermostat base
Figure 3. Typical wiring diagram for single transformer heat pump systems
Figure 4. Typical wiring diagram for two transformer heat pump systems with NO safety circuits
Figure 5. Typical wiring diagram for two transformer heat pump systems with safety circuits in
BOTH systems
Heat Pump Terminal Outputs
Refer to equipment manufacturers' instructions for specific system wiring information.
You can configure the thermostat for use with the following heat pump system types:
HEAT PUMP TYPE 1. Single stage compressor system; gas or electric backup. This
thermostat is designed to operate a single-transformer system. If you have a
two-transformer system, cut and tape off one transformer. If transformer safety circuits
are in only one of the systems, remove the transformer of the system with NO safety
circuits. If required, replace remaining transformer with a 75VA Class II transformer. After
disconnecting one transformer, the two commons must be jumpered together.
Use the terminal output information below to help you wire the thermostat properly for
your heat pump system. After wiring, see CONFIGURATION section for proper
thermostat configuration.
THERMOSTAT TERMINALS (HEAT PUMP)
SYSTEM
Heat Pump 1
L
Malfunction
C*
24 Volt(Common)
R
24 Volt Emergency (hot)
E/W1
Emergency Mode 1st stage
W2
HP 1 and Emergency 2nd stage
Y1
Heat and Cool mode 1st stage (compressor)
G
Blower/Fan Energized on call for Heat and Cool
Set GAS/ELEC switch for Emergency mode
O
Energized in Cool Mode
B
Energized in Heat Emergency mode
Figure 5. Typical wiring diagram for single transformer multi-stage systems
CHECK THERMOSTAT OPERATION
Note:
To prevent static discharge problems, touch side of thermostat to release static
build-up before touching any keys.
If at any time during testing your system does not operate properly, contact a
qualified service person.
Fan Operation
If your system does not have a G terminal connection, skip to Heating System.
1. Turn on power to system.
2. Move FAN switch to ON position. The blower should begin to operate.
3. Move FAN switch to AUTO position. The blower should stop immediately
Heating System
1. Move system switch to heat mode. If the auxiliary heating system has a standing pilot,
be sure to light it.
2. Press to adjust thermostat setting to 2
℉（
1°C
）
above room temperature. The heating
system should begin to
operate. The display should show “STG1”. However, if the
setpoint temperature display is flashing, the compressor lockout feature is operating
(see Configuration menu, item 5).
3. Adjust temperature setting to 4
℉（
2°C
）
above room temperature. If your system
configuration is set at MS2 or HP1, the auxiliary heat system should begin to operate
and the
display should show “STG1+2”.
4. Press to adjust the thermostat below room temperature. The heating system should
stop operating.
Emergency System
EMER bypasses the Heat Pump to use the heat source wired to terminal E on the
thermostat. EMER is typically used when compressor operation is not desired, or you
prefer back-up heat only.
1. Press SYSTEM switch to select Heat mode. Then press EMER key.
“EMER” will show
on the display.
2. Press to adjust thermostat setting above room temperature. The Aux heating system
will begin to
operate. The display will show “STG1” “EMER” to indicate that the Aux
system is operating.
3. Adjust temperature setting to 4
℉（
2°C
）
above room temperature. The auxiliary heat
system should begin to operate and the
display should show “STG1+2”.
4. Press to adjust the thermostat below room temperature. The Aux heating system
should stop operating.
Cooling System
1. Move SYSTEM switch to select the Cool mode.
2. Press to adjust thermostat setting below room temperature. The blower should come
on immediately on high speed, followed by cold air circulation. The display should show
“STG1”.
3. Press to adjust the temperature setting above room temperature. The cooling system
should stop operating.
CONFIGURATION MENU
INSTALLER/CONFIGURATION MENU
Step
Press
Button
Displayed
(Factory Default)
Press up or down
key to select
Comments
1
F
MS 2
SS1, HP1,HP2
Selects Single stage, Multi-stage,
or Heat Pump (Single stage)
System Configuration
2
F
(RECO)off
on
Auto Recovery select
3
F
(SPAN)2
1,3
Span(one stage)
4
F
(BLIT)on
off
BackLight
5
F
(SP2)2
1,3
Span(Two Stage)
6
F
(TEMP)F
C
Selects temperature
display °F or °C
7
F
HOUR(12)
24
Selects time format display
12hours or 24hours
8
F
COMP(OFF)
ON
Selects Compressor
Lockout OFF or ON
9
F
COOL(2)
1
This model must select 1
10
F
FACT(0)
1,2
Select 1,all the settings will
go back to factory default
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 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 circle key to change to the next
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) Single Stage, Multi-stage or Heat Pump System Configuration
This control can be configured for Heat Pump or two stage heat/one stage cool
multi-stage operation.
The display indicates “MS 2” (default for multi-stage mode). The
Multi-stage configuration can be
toggled to “SS1” or “HP1” by pressing the up or down
key. In Multi-stage configuration, EMER mode is useless. The
“HP2” is no use.
2) Select Energy Management Recovery OFF or ON
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 time.
3) Fast or Slow Cycle Selection (one stage)
4) Select Backlight function OFF or ON
5) Fast or Slow Cycle Selection (two stage)
6) Select °F or °C Readout. When you change this parameter the programming resets
back to the default settings. All previous programming will be lost.
Changes the display readout to Centigrade or Fahrenheit as required
7) Selects time format display 12hours or 24hours
8) Select Compressor Lockout COMP OFF or ON
Selecting COMP ON will cause the thermostat to wait 4 minutes before turning on the
compressor if the heating and cooling system loses power. It will also wait 5 minutes
minimum between cooling and heating cycles. This is intended to help protect the
compressor from short cycling. Some newer compressors already have a time delay
built in and do not require this feature. Your compressor manufacturer can tell you if
the lockout feature is already present in their system. When the thermostat compressor
time delay occurs it will flash the setpoint for about four minutes.
9) This model must select 1
10) This model must select 1 to back factory Default
Setting Time And Day
Remove the mylar label 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 time of 9:43 a.m. on
Saturday Refer to Figure at right
■ During time and day setting mode, the temperature
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
indicator, as the display will cycle through 24 hours.
■ Press and hold to rapid advance to the current
minute
.
Tap to advance one minute at a time.
■ Tap to advance one day at a time.
■ When finished press to return to normal mode.
After 15 seconds, the thermostat will return to normal
automatically.
Auto Programming
Studies conducted by the Department of Energy estimate that
setting your thermos
tat back 10˚F (6
℃
) for two 8-hour periods
during winter can reduce your fuel bill by as much as 33%. By
setting your thermostat up 5
˚F (3
℃
) for two 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 shown in the table, or each
weekday can have a different set of 4 programs. Similarly
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 it is
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
COOL
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 (29
℃
)
■ Refer to Manual Programming for entering/changing the programs.
PROGRAMMING
Before programming or changing programs, use this Personal Programing Schedule to
determine the times and temperature settings that 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.
AUTO
PROG
DAY
HOUR
MIN
HOLD
/ RUN
K2
Elec-Gas
Switch
GAS
ELE
C
Mounting
Hole
Mounting
Hole
Mon
AM
4
TEMP
Sat
AM
Sat
AM
TEMP
Sat Sun
AM
2
HEAT
TEMP
Mon Tue Wed Thu Fri
Mon Tue Wed Thu Fri Sat Sun
AM
PM
1 2
3 4
Reversing
Valve
Energized in
Cool Mode
Reversing
Valve
Energized in
Heat,
Emergency
Mode
Fan
Relay
Emergency
Heat
Relay
Compressor
Contactor
Aux
Heat
Relay
＊
Limit or
Safety
Switches
Limit or
Safety
Switches
HOT
120 VAC
Heat Pump Transformer
(Class Current Limited)
24 VAC
Limit or Safety
Switches
COMMON
HOT
120VAC
Auxiliary
Heating
Transformer
(Class
Current Limited)
24VAC
Limit or
Safety
Switches
NEUTRAL
NEUTRAL
COMMON
The accessory relay scheme
is required when safety
circuits exist in both systems
Reversing
Valve
Energized in
Cool Mode
Reversing
Valve
Energized in
Heat,
Emergency
Mode
Fan
Relay
Heat
Relay
Stage 1
Compressor
Contactor
Stage 1
＊
II
Heat
Relay
Stage 2
Overrides energy-
saving program
For entering
hour of day.
For entering
minute of day.
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
Automatically programs the
thermostat to its built-in
Selects the day or days to
review or change in Program
Mode.
Provides permanent temperature setting
by overriding stored programs. It also
Returns display to current
time and temperature.
For entering day of week.
HOME
HOUR
MIN
ENER
AUTO
PROG
DAY
PROG
PROG
DAY
TODAY
temperatures while
you are at home
for the day.
your energy usage, you can
program the thermostat to
optimize energy savings.
ENERGY STAR compliant
program setting.
R
returns the thermostat to current program
control from manual override or Home
Today mode.
EMER
HOLD
/ RUN
EMER Mode.
Emergency
Mode
TEMP
LCD Display: Shows Time,Day,Temperature,Program Number,and
other feature information as required.
Temperature Keys:
Keys for raising or lowering
temperature setting.
Reviews filter usage
in hours and minutes.
Also resets filter
counter to zero.
Front Door:
Cover keys Open with one finger from left or right.
Soft touch programming
buttons (see below)
Fan Switch: Fan
switch for Automatic
or Continuous fan
operation.
System Switch:
Selector switch for
Cool,Off,Heat or auto.
heat
off
cool
auto
FAN
SYSTEM
ON
AUTO
System Switch:
Selector switch for
Cool, Off, Heat or Auto
Hot
120 VAC
TRANSFORMER
24 VAC
Emergency
Heat
Relay
Aux
Heat
Relay
Fan
Relay
Compressor
Contactor
Reversing
Valve
Energized in
Heat
Emergency
Mode
(Class Ⅱ Current Limited)
Reversing
Valve
Energized in
Cool Mode
*
Reversing
Valve
Energized in
Cool Mode
Reversing
Valve
Energized in
Heat,
Emergency
Mode
Fan
Relay
Emergency
Heat
Relay
Compressor
Contactor
Aux
Heat
Relay
＊
Hot
120 VAC
Neutral
TRANSFORMER
(Class
Current Limited)
24 VAC
Limit or Safety
Switches
