Comfort Stat BLU2801 Owner's Manual

Digital Thermostat Owners Manual
Model:BLU2801
Front Door:
LCD Display shows Time,Day, Temperature Keys:Keys for raising
Temperature,Program Number, or lowering temperature setting Covers keys
and other feature information Open with
Soft touch programming One finger
as required
buttons(see below)
up and down
System switch:Selector switch
Fan Switch: Fan switch for
Automatic or Continuous fan for cool,heat or off.

operation

FEATURES

Structure of thermostat and explanation for the keypads
For entering Time Measures and displays
heating and cooling system
operating time for Today,
Yesterday,This Week,Last
TIME ENER
Week,or Total.By monitoring
your energy usage,you can
EMER RUN program the thermostat to
optimize energy savings.
EMER Mode Returns display to current time and temperature.
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

OPERATION
YOUR THERMOSTAT REPLACES
Description
Heat Pump (No Aux. or Emergency Heat)
Heat Pump (with Aux. or Emergency Heat)
Standard Heat & Cooling Systems
Two Stage Heat & One Stage Cool
Standard Heat Only Systems
Millivolt Heat Only Systems– Floor or Wall
Furnaces
Standard Central Air Conditioning
Gas or Oil Heat
Electric Furnace
Hydronic (Hot Water) Zone Heat-2 Wires
Hydronic (Hot Water) Zone Heat–3 Wires
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 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.
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)
■ Electric drill and 3/16" bit
(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
logo
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
BLU2801
will damage control and could cause shock or fire hazard. Do not short
Yes
out terminals on gas valve or primary control to test. Short or incorrect
Yes wiring will damage thermostat and could cause personal injury and/or
property damage.
Yes
Selector Switches
Yes
Electric/Gas Switch (Fan Option)
Yes
Yes
Elec-Gas
Switch
Yes
Yes
Yes
Yes
No
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.
M o u n t i n g
H o l e
NOTE: The
Reversing
Valve
Energized in
Cool Mode
Figure 3 Typical wiring diagram for single transformer heat pump
■ Small Philips screwdriver
■ Two1.5V (AAA) size alkaline batteries
Figure 1. Electric/Gas Switch (Fan Option)
M o u n t i n g
H o l e
Figure 2. Thermostat base
＊
Reversing
Fan Emergency
Valve
Relay Heat
Energized in
Aux Relay
Heat, Compressor
Heat
Emergency Contactor
Relay
Mode
24 VAC
■ Hammer
Reversing
Reversing
Valve
Valve
Energized in
Energized in
Cool Mode
Heat,
Emergency
Mode
Figure 4. Typical wiring diagram for two transformer heat pump
systems with NO safety circuits
Reversing
Reversing
Valve Valve Fan
Energized in Relay
Energized in
Cool Mode
Heat,
Compressor
Emergency Contactor
Mode
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
L
C*
R
E/W1
W2
Y1
G
O
B
Reversing
Reversing
Valve
Valve
Energized in
Energized in
Cool Mode
Heat,
Compressor
Emergency
Contactor
Mode
Stage 1
Figure 6. Typical wiring diagram for single transformer multi-stage

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 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 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 display should show "STG1+2".
4. Press to adjust the thermostat below room temperature. The Aux. heating
TRANSFORMER
(Class Current
system should stop operating.
Limited)
Hot
120 VAC

Cooling System

Neutral
1. Move SYSTEM switch to select the Cool mode.
systems
＊
Limit or Safety
Fan Emergency
Switches
Relay Heat
Aux TRANSFORMER
Relay
Compressor
(Class Current Lim
Heat
Contactor
Relay
Hot
120 VAC
24 VAC
Neutral
＊
Limit or
Limit or
Safety
HOT
Safety
Emergency Switches
24VAC
120VAC
Heat Switches
Aux Relay
Heat Auxiliary
The accessory relay scheme
Relay Heating
is required when safety
Transformer
circuits ezist in both systems
COMMON
(Class
Limit or Current Limited)
Limit or Safety
Safety
Switches
Switches
COMMON 24 VAC 120 VAC
Heat Pump Transformer
(Class Current Limited)
Heat Pump 1
Malfunction
24 Volt(Common)
24 Volt Emergency (hot)
Emergency Mode 1st stage
HP 1 and Emergency 2nd stage
Heat and Cool mode 1st stage
(compressor)
Blower/Fan Energized on call for Heat and
Cool
Set GAS/ELEC switch for Emergency
mode
Energized in Cool Mode
Energized in Heat Emergency mode
＊
Heat
Relay
Stage 1
Heat
Fan
Relay
Relay
Stage 2
Ⅱ
systems
NEUTRAL
HOT
NEUTRAL