Elro KT300RF User Manual

KT300RF

Instruction Manual

WARNING - Please read this manual prior to installation or use.
SHOCK HAZARD

This unit must be installed by a competent person, in accordance with BS 7671 (the IEE
Wiring Regulations), or other relevant national regulations and codes of good practice.

Always isolate the AC Mains supply before removing the unit from the Industry
Standard Back Plate.

1. INTRODUCTION

This thermostat can replace most common residential thermostat and is designed to be used
with electric, gas or oil heating control system or cooling system.

Unlike ordinary single unit design thermostat, this unit is a new type of thermostat separating
the thermostat function into two units. The Receiver serves for wiring connections and
heat/cool on/off control. The Control Centre serves as user interface
and temperature sensing/control. The two units are linked by RF.

The advantage is that user can put the Control Centre nearby and can read/control the
temperature of really the living area.

2. OUTLOOK OF CONTROL CENTRE:

1

:

20 20

P

20.5

00 06 12 18 00

P

1 2 3 4 5 6 7

Heat/Cooler

Comf

Econ

°C

Program nr

Manual overide

Up button
Conf/Econ button
Down button

Back-Light button

Set temperature button

Set program button
Set time button
Reset button

20 20

00 06 12 18 24

P

:

-

20.5

+

°C

Day indicator

Clock

Anti-freezing
Battery low

Temperature

Control profile
bar

CONTROL CENTRE:

- Can be placed anywhere in the home to detect and control
the temperature of an area of the user’s choice. Not limited
by power control wiringlocations.

- Link with the Receiver via RF. Control distance 50M open site

- LCD shows the "need to know" information only, which is
more easy to understand.- Real time clock with day of the
week display

- Room temperature display

- Control profile display

- Simplified temperature adjustment - Simplified programming
procedure

- 6 pre-defined control profiles, 3 user programmable control
profile

- A protection against freezing

- Temporary override set-temperature

- User selectable temperature span

- User selectable heater/cooler operation mode

- Battery level detection

- 2 AA size alkaline batteries (not included)

- Slim housing design

- EL backlight

RECEIVER:

- Linked with Control Centre via RF.

- Power control rating up to 230VAC 16A resistive.

- Powered by line voltage only. No battery required.

- Two LED indicators for power and output status.

3.INSTALLATION OF RECEIVER

CAUTION :

1.The appliance can only be mounted indoors and in areas free
from any water or moisture

2.A suitable fuse with a rating not exceeding 16A, should be in
the power line.

3.Observe the nation regulator for the wiring.

4.A qualified electrician is recommended for installation and
servicing. This thermostat has been designed for simple and
quick installation requiring only a few tools. Only the Power
Control Unit needs to be installed.

Front viewFront view

LED indicatorLED indicator

Power switchPower switch

Back viewBack view

FEATURES :

Several useful function and operating modes have been incorporated to suit a variety of
customer needs besides all the features associated with the state of the art
programmable thermostat.

-1- -2-

REQUIRED TOOLS

Hammer, Masking tape, Screwdriver, Drill and 3/16" drill bit (if not
installed on a junction box)

RF ADDRESS CODE SETTING

If there is another user nearby, e.g. in the next house, your
receiver may be fault triggered by their transmitter. You may
select a different RF address code to prevent this. Receiver can
only response to RF coding with the same address code setting as
its own address code.

1.To adjust address code of Receiver, simply push up one or more
of the 5 dip switchlevers.

2.To adjust address code of Control Centre, open the housing of
the transmitter unit. See battery replacement section on how to
open the housing.

3.Remove one or more of the jumper caps as shown in the
diagram below.

CAUTION:

1.Address code of Control Centre must be the same as address
code of Receiver. For any jumper cap removal of address code #
in Control Centre, the same address code # ofReceiver must be
put to the UP position.

2.Disconnect AC power and remove batteries prior to adjusting address code.

WARNING:

After removing the wall plate, if you find that it is mounted on a junction box (e.g. a box
similar to one behind a light switch or electric outlet), high voltage circuit may be present
and there is a danger of electric shock. Please consult a qualified electrician.

CHOOSING A LOCATION

Note: for a new installation, choose a mounting location about five feet (1.5 metre) above
the floor in an area with good air circulation and away from.

1. Drafts.

2. Air ducts.

3. Radiant heat from the sun or appliances.

4. Concealed pipes and chimneys.

MOUNTING THE RECEIVER ONTO THE WALL/JUNCTION BOX:

1.Remove the front cover of the Receiver. (go to step 4 if installed on a junction box)

2.Mark the holes position.

3.Drill two holes and insert the plastic anchors carefully into the holes until they are flush
with the wall.

4.Connect the wires - see wiring diagram.

5.Push on the wires in the wall.

6.Securely fasten the Receiver to the wall with the two screws.

7.Replace the front cover and installation is completed.

MOUNTING THE RECEIVER ONTO THE OPTIONAL WALL BOX:

1.Remove the front cover of the Receiver.

2.Mark the holes position for the wall box.

3.Drill two holes and insert the plastic anchors carefully into the holes until they are flush
with the wall.

4.Pull the wires into the wall box and fasten the wall box onto the wall.

5.Connect the wires - see wiring diagram.

6.Push on the wires in the wall box.

7.Securely fasten the Receiver to the wall box with the two screws.

8.Replace the front cover and installation is completed.

WIRING DIAGRAM FOR 230V

APPLICATION

The unit is default 230V, you must
ad a link between COM & L, follow
diagram.

WIRING DIAGRAM FOR VOLT

FREE APPLICATION

The unit still requires a 230V feed
for V.F. applications

SL (Off) - Heat Off

L - Live

SL (On) - Heat On

N - Nuetral

It is vital to connect the
live into this terminal to
avoid overloading of the
jump wire.

N - Nuetral

L - Live (230V Feed)

NO - Switched Live

COM - Volt Free Feed

NC - Normally Closed

Most common connexion
in Europe.

NCNC

NN

COMCOM

LL

NONO

NCNC

NN

COMCOM

LL

NONO

4. SETTING OF CONTROL CENTRE

Heater/Cooler Selection

Before making any selection in the control centre, its back housing must be removed as
follows:

Inside the Control Centre after back housing is removed, you can find the DIP switch. These
three switches are used to control the span and heat/cool system. Set the DIP switch
(position 3) according to your selection of heater system or cooler system as the following
diagram.

swtich 3 ON = heaterswtich 3 ON = heater

-3- -4-

swtich 3 OFF = coolerswtich 3 OFF = cooler

5. TEMPERATURE SPAN SELECTION

Span is the temperature difference between the turn on
temperature and turn off temperature. For example, in heating
systems, if you set temperature to 20°C and span to 1°C, the
heater will operate when the room temperature drops to 19.5°C
and turns off when the temperature rises to 20.5°C. Set the DIP

1 2 Span

ON ON 1°C

OFF ON 2°C

ON OFF 3°C

OFF OFF 4°C

switch (position 1 & 2) according to your selection of temperature
span as the following diagram.

6. BATTERY INSTALLATION

Your thermostat uses two (2) "AA" size alkaline batteries to operate. To power-up the
unit, insert two "AA" batteries into the battery compartment of the front housing. When
power is applied for the first time, the display must show time and the day as well as the
room temperature (for example 28.5°C). If the display is different, press the RESET
button. Use a fine probe such as straightened paper clip to gently push the RESET button.
After installation of the batteries, push back the rear housing to the control centre and
then the stand. Before turning on the main switch of the system, press the reset button
once. The thermostat is ready for use.

7. SETTING CLOCK

1.Press the SET TIME button to clear all digits except the day indicator and the time
display. The day indicator is flashing.

2.While day indicator is flashing, press UP or DOWN button to adjust.

3.Press the SET TIME button again, hour digits are flashing instead of day indicator. Press
UP or DOWN button to adjust. Press and hold the UP or DOWN button to speed up the
adjustment rate.

4.Press the SET TIME button again, minute digits are flashing instead of hour digit. Press
UP or DOWN button to adjust. Press and hold the UP or DOWN button to speed up the
adjustment rate.

5.Press the SET TIME button again to return to normal operation mode.

6.The unit will return to normal operation mode if no key is pressed for 10 seconds.

8. SETTING CONTROL TEMPERATURE

1.Press the SET TEMPERATURE button to display the pre-defined set temperature.

2.Press the CONF/ECON button to toggle between the setting of economic mode and
comfortable mode.

3.Press the UP or DOWN button to increase/decrease the set temperature by 0.5°C.

4.Press the SET TEMPERATURE button again to save the set temperature.

5.The unit will return to normal operation mode if no button is pressed for 10 seconds.

6.The default setting of comfortable mode is 21°C for heater mode and 23°C for cooler
mode. And the economic mode is 18°C for heater mode and 26°C for cooler mode.

9. SETTING PROGRAMS * SELECT WEEK-DAY

1.Press the SET PROGRAM button, the day indicator shows the program day and is
flashing. Program number indicator shows the current program for the selected day.

2.Press the UP or DOWN button to select the day needed to program. You can select the
whole week, working day, weekend,or individual day to program.

10. SELECT CONTROL PROFILE * PRE-DEFINED

1.Press the SET PROGRAM button indicator stop flashing and the program starts flash.

2.Press the UP or DOWN
button to select the program
profile. P1-P6 are predefined
program, their profile are
shown as follows.

3.If any of these programs is
selected, press the SET
PROGRAM button again to
confirm this program for the
specified day and return to
normal operation mode.

PROGRAMMABLE CONTROL
PROFILE

4.If temperature setting does
not have to be chagend for a
specific hour, pres to go
to the next hour.

P

Program number Program profile

Program 1:
Factory Preset
"Whole day Comfort"

Program 2:
Factory Preset

P

"Whole day Econ"

Program 3:
Factory Preset
"Holiday"

Program 4:
Factory Preset
"Whole day (A)"

Program 5:
Factory Preset
"Whole day (B)"

Program 6:
Factory Preset
"Half-day work"

00 06 12 18 24

00 06 12 18 24

00 06 12 18 24

00 06 12 18 24

00 06 12 18 24

00 06 12 18 24

Press the button to toggle the control temperature setting and advance the
settinghour digit by one.

EXAMPLE:

button is pressed. Hour Digit (Clock) is 2 and the 02 hour bar is flashing is on

and the operation mode for hour 01 is set to economic mode.

5.Press the button to terminate the setting procedure and to return to normal

P

operation mode.

EXAMPLE:

P

button is pressed.Terminate the setting procedure and the new control profile is :

6.The setting procedure will terminate automatically when no button is pressed for 10

00 06 12 18 24

00 06 12 18 24

seconds.

11. TESTING THE RF TRANSMISSION RANGE

1.Press UP button until the setpoint temperature is higher than room temperature by a
few degrees.

2.Wait for a few seconds.

3.Check the green LED. It should be On.

4.If the LED is not On, try to place the Control Centre closer to the Receiver. Press Down
button to adjust the setpoint temperature to be lower than room temperature to "turn
off" the receiver.

5.Repeat steps 1 to 3.

6.The receiving range between Control Centre and Receiver is 50M in open area. When
placed indoors, this distance may be shorter because of blocking by concrete walls etc,
but is enough for most household applications.

7.Press RESET button after receiving range testing.

-5- -6-

12. TEMPORARY OVERRIDE * OVERRIDE THE OPERATION MODE

At the normal operation mode, press the CONF/ECON button to toggle the current set
temperature to comfortable mode or economic mode. If the operation mode is being
overriden, the HAND icon will be turned on with the current operation mode icon.

13. OVERRIDE THE SETTING TEMPERATURE

1.In the normal operation mode, the current set temperature can be overriden by
pressing the UP or DOWN button. When in override, the new set temperature will be
displayed with turning the HAND icon on and both the CONF and ECON icons off.

2.Press any button (except the UP or DOWN button), this will terminate the setting
procedure and will revert back to normal mode with the new setting.

3.The unit will revert to normal operation mode automatically when no button is pressed f
or 10 seconds.

14. ANTI-FREEZING MODE

1.Pressing the UP and DOWN buttons simultaneously will activate the anti-freezing
mode (for heater mode only). The ANTIFREEZING icon and the HAND icon will be
turned on while both the COMF and ECON icon will be turned off.

2.Pressing any button will terminate the antifreezing mode and revert to normal
operation mode.

3.The default set temperature for the anti-freezing mode is 7°C.

15. BACK- LIGHT

Press the BACK-LIGHT button to turn on the backlight. The back-light will switch off when
no button is pressed for 10 seconds.

16. BATTERY REPLACEMENT

It is recommended to replace the batteries when the display is showing the battery-low
icon. To replace the battery,

1.Turn off the power of the Receiver first.

2.Remove the back housing and stand of the Desktop Unit.

3.Replace the old batteries with 2 new AA alkaline batteries.

4.Replace the back housing and stand.

5.Press the reset button once and then turn on the power switch of the Receiver.

17. POWER SWITCH

There is a power switch on the Receiver. When there is no demand to turn on the
heating/cooling device, e.g. when you go on holiday, it is recommended to turn the power
switch to the Off position.

19. SPECIFICATION
Physical Characteristic

Size : Control Centre 116 x 100 x 23.5 mm
Receiver : 91.5 x 91.5 x 42 mm
Weight : Control Centre 126g
Receiver : 176g

Electrical Characteristic

Power Source : Control Centre 2 AA (LR6) alkaline batteries
Receiver : 230VAC 50Hz
Clock accuracy : +/ - 60 seconds/month
Temp. measurement : 0°C to 40°C in 0.5°C resolution
Temp. accuracy : +/ - 1°C at 20°C
Temperature Control : 7°C to 30°C in step of 0.5°C
Span : 1,2,3 or 4°C
Air conditioner cycle time : 3 minutes
Operation temperature : 0°C to 40°C
Storage temperature : - 10°C to 60°C

20. TROUBLESHOOTING.

No display:

- Batteries empty:

- Batteries are not properly installed (polarity)

Boiler does not switch on, wheel is turning:

- Wrong type battery installed, use only alkaline batteries.

- Batteries almost empty

- Wireconnection disjointed by the coronet connection

- Boiler not properly connected

- Wrong code

- Distance is to big

Thermostat does not switch on, wheel is not turning:

- Temperature set too low

- Program is manually bridged

- Switch stands on Off

Temperature cannot be properly adjusted:

- Thermostat is placed too close near a radiator or window.

- Set a smaller span.

18. LED INDICATOR

There are two LEDs on the Power Control Unit as status indicators:

1.Red LED turns on as long as there is power to theunit. When there is no power to the
unit or when power switch underneath the front cover is put at the Off position, the red
LED is Off.

2.Green LED turns on as long as the heating/cooling device is energised.

-7- -8-

21. CLEANING

The products are maintenance-free, so don'topen them. Clean only the outside of the
products with a soft dry cloth.Before you clean them, switch off the power of products.

Don't use carbolic cleaning products like benzene, alcohol or similar products. They are
aggressive on the surface of the appliances. Besides, zijn the steams are dangerous for
your health and combustible. Don't use sharp devices, screwdrivers, wire brushes
or similar things for cleaning.