Digital Thermostat Owners Manual
Model:KJR-25B
FEATURES
Structure of thermostat and explanation for the keypads
We are pleased you have selected one of our broad line of wall thermostat.
Our products are manufactured to high quality standards and are
designed
for years of service.
Read This Before Installing Thermostat
OPERATION
YOUR THERMOSTAT REPLACES
Description
KJR-25B
Heat Pump (No Aux. or Emergency Heat)
Yes
Heat Pump (with Aux. or Emergency Heat)
Yes
Standard Heat & Cooling Systems
Yes
Two Stage Heat & Two 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 AA
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.
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 (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. 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 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
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 subbase.
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 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
Heat Pump 2
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)
Y2
No output
2nd 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 serviceperson.
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 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 MS2, HP2 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 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”.
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
Returns display to current
time and temperature.
Measures and displays
heating and cooling system
operating time for Today,
Yesterday,This Week,Last
Week,or Total.
For entering Time
EMER Mode
EMER
TIME
TEMP
Front Door:
Cover keys Open with one finger from left or right.
Heat,Cool,and Off.
Selector switch for
System Switch:
operation.
or Continuous fan
switch for Automatic
Fan Switch: Fan
functions.
Time,Program,and Span
and decreasing selections in the
setting. Also used for increasing
changing the Temperature
Up and Down Key:Key for
ENER
RUN
Backlight key
Program Number,and other feature information
LCD Display:Shows Time,Day,Temperature,
as required.
cool
off
heat
system
fan
on
auto
K2
Elec-Gas
Switch
GAS
ELEC
Mounting
Hole
Mounting
Hole
Reversing
Valve
Energized in
Cool Mode
Reversing
Valve
Energized in
Heat,
Emergency
Mode
2nd Stage
Compressor
Fan
Relay
Emergency
Heat
Relay
Compressor
Contactor
Aux
Heat
Relay
＊
Hot
120 VAC
Neutral
TRANSFORMER
(Class Current Limited)
24 VAC
Reversing
Valve
Energized in
Cool Mode
Reversing
Valve
Energized in
Heat,
Emergency
Mode
2nd Stage
Compressor
Fan
Relay
Emergency
Heat
Relay
Compressor
Contactor
Aux
Heat
Relay
＊
Hot
120 VAC
Neutral
TRANSFORMER
(Class
Current Limited)
24 VAC
Limit or Safety
Switches
Reversing
Valve
Energized in
Cool Mode
Reversing
Valve
Energized in
Heat,
Emergency
Mode
2nd Stage
Compressor
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
Heat
Relay
Stage 1
Compressor
Contactor
Stage 1
＊
Heat
Relay
Stage 2
Compressor
Contactor
Stage 2
