Comfort Stat BLU2801 Owner's Manual
Digital Thermostat Owners Manual
Model:BLU2801
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 standa rds and are designed
for years of service.
Read This Before Installing Thermostat
OPERATION
YOUR THERMOSTAT REPLACES
Description BLU2801
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
2, 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
system, Please configure the thermostat according to
Configuration Menu before operation.
REMOVE THE MYLAR LABEL FORM THE LCD DISPLAY WINDOW.
INSTALLATION
3, All installation is normally performed at your thermostat.
COMPRESSOR PROTECTION
4，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.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 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
6， Whenever the main power is interrupted or fails, the battery power
retains and 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 AAA
batteries, You have approximately 1 minute to change the batteries and keep
thermostat’s clock. Once the batteries have become too low to en sure
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.
■ Slotted Screwdriver(s) ■ Small Philips screwdriver ■ Hammer
■ Electric drill and 3/16” bit ■ Two1.5V (AAA) 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 sub base, 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 sub base, 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 it 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. Short or incorrect
wiring will damage 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 circulatory 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 EMER mode.
All wiring diagrams are for typical systems only. Refer to equipment
manufacturers’ 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 sub 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 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 jumped
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 6. 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 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 1 ℃ above room temperature. The
heating system should begin to operate. The dis play 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 3° above room temperature. If your system
configuration is set at MS2or HP1, the auxiliary heat system should begin to
operate and the display should show “STG1+2”.
4. Press it to adjust the thermostat below room temperature. The heating
system should stop operating.
Emergency System
EMER by passing 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 it 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 2°C above room temperature. The auxiliary
heat system should begin to operate and the displa y should show “STG1+2”.
4. Press to adjust the thermostat below roo m temperature. The Aux. heating
system should stop operating.
Cooling System
1. Move SYSTEM switch to select the Cool mode.
Hot
120 VAC
Neutral
TRANSFORMER
(Class Current
Limited)
24 VAC
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 Li
m
24 VAC
Limit or Safety
Switches
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 ezist in both systems
Reversing
Valve
Energized in
Cool Mode
Reversing
Valve
Energized in
Heat,
Emergency
Mode
Fan
Relay
Emergency
Heat
Relay
Compressor
Contactor
Aux
Heat
Relay
＊
Reversing
Valve
Energized in
Cool Mode
Reversing
Valve
Energized in
Heat,
Emergency
Mode
Fan
Relay
Heat
Relay
Stage 1
Compressor
Contactor
Stage 1
＊
Heat
Relay
Stage 2
Ⅱ
GAS ELEC
Elec-Gas
Switch
Mountin
g
Hol
e
Mountin
g
Hol
e
Fan switch: Fan switch for
Automatic or Co n tin u o us fan
operation
System switch:Selector switch
for cool,heat or off.
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
TIME ENER
EMER RUN
Measures and displays
heating and cooling system
operating time for Today,
Yesterday,This Week,Last
Week,or Total.By monitoring
your energy usage,you can
program the thermostat to
optimize energy savings.
For entering Time
Returns display to current
time and temperature.
EMER Mode
Mon
HEAT
AM
1
2. Press it 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 it 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 ENER MS 2 SS1, HP1 Sele cts Single stage,
Multi-stage, or Heat Pump
System Configuration
2 ENER (SPAN)2 1,3 Span(one stage)
3 ENER (BLIT)on off BackLight
4 ENER (SP2)2 1,3 Span(Two Stage)
5 ENER (TEMP)F C Selects te mperature
display °F or °C
6 ENER HOUR(12) 24 Selects time format display
12hours or 24hours
7 ENER COMP(OFF) ON Selects Compressor
Lockout OFF or ON
8 ENER COOL(1) 1 This model must select 1
9 ENER FACT(0) 1 Select 1,all the setting 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 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 normal operation, press
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) in the display. 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.
2)Fast or Slow Cycle Selection(one stage)
3)Select Backlight function OFF or ON
4) Fast or Slow Cycle Selection(two stage)
5)Select F° or C° Readout.
Changes the display readout to Centigrade or Fahrenheit as required
6) Selects time format display 12hours or 24hours
7)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 4 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.
8) This model must select 1
9)This model must select 1 to back factory Default
Setting Day and Time
y The LCD will show this information when batteries
are first installed. The temperature will update after a
few seconds.
y During time and day setting mode, the temperature
displays will go blank.
y Examples: Set the Thermostat to the current time of 9:43 am on
Saturday.
Refer to the Steps below.
STEP 1:
y Press to enter time and day setting mode . The
current hour will be flashing.
y Press 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 12PM.
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.
y Press up or down to change the Day up or down to
the current day.
STEP 4:
y Press 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.
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, In order to take full advantage of
this thermostat’s feature.
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.
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. 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 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 need clean or change your system’s filter, “FILT” will continue
to flash until the counter is set back to zero.
■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.
Keyboard lock
The keyboard can be locked to prevent unauthorized
changes to the thermostat.
To lock or unlock the keyboard, press and HOLD/RUN Key
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 lights 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 weak 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 installe d. After confirming that
new batteries have been inserted, the thermostat will return to normal
operation.
Error Mode
If the thermostat is unable to contro l your system due to an
unexpected battery problem, the thermostat will enter Error
Mode. In this condition, the thermostat flashes
“E1”,“E2”,”E3”or”E4”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 ke y to release
the rest energy. Then place the battery again. You will need
confirm normal operation.
If Error Mode returns, please call us for further information.
LCD display Information
E1 Sensor Error
E2 System switch Error
E3 No use
E4 E2 memory Error
Warning Mode
If the SYSTEM MONITOR SWITCH is close show the
system have wrong.the thermostat flash “E5”on the LCD
display.
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 respon ds to thermostat controls, the Auto
Cut-Off will have no effect.
TROUBLESHOOTING
Problem Solution
SCRAMBLED OR
DOUBLE
DISPLAY
(numbers over
numbers)
1. Remove clear mylar sticker.
NO DISPLAY 1. Check battery connections and batteries
2. Move the battery out, and then hold any key to
release the rest energy. Then place the batte ry
again.
ENTIRE DISPLAY
DIMS
1. Replace Batteries
AUTO/FAN DOES
NOT TURN ON
1. Move Elec/Gas selector to opposite position is in
the correct position.
2. There may be as much as 4 minute delay before
the Heat or Cool system turns On-wait and check.
(Compressor protection delay).
3 ，Check your circuit breaks and switches to
ensure there is power to the system.
4. Replace batteries.
5. Make sure your furnace blower door is closed
properly.
6. 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 batte ry
again.
IF UNIT
CONTINUES
TO OPERATE IN
THE OFF
POSITION
1. Replace unit
THERMOSTAT
PERMANENTLY
READS
“E1”,”E2”,”E3”,
“E4”.
1. Replace unit.
on
auto
fan
heat
off
cool
system
TIME
TIME
TIME
TIME
TIME
ENER
ENER
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