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