Salus ERT20RF Instruction Manual

Electronic Thermostat With RF

Model No: ERT20RF

INSTRUCTION MANUAL

2 ERT20RF

PRODUCT COMPLIANCE

This product complies with the essential requirements of the following EC Directives:

Electro-Magnetic Compatibility directive 2004/108/EC

•
Low Voltage Directive 2006/95/EEC

•
EC Marking directive 93/68/EEC

•

SAFETY INFORMATION

These instructions are applicable to the SALUS Controls model stated on the front cover of this
manual only, and must not be used with any other make or model.

This accessory must be tted by a Competent person, and installation must comply with the
guidance provided in the current editions of BS7671 (IEE Wiring Regulations) and Part ‘P’ of the
Building Regulations. Failure to comply with the requirements of these publications could
lead to prosecution.

Always isolate the AC Mains supply before opening

or removing the unit from the wall or wall box.

When tting batteries don’t mix old and new batteries together.

When tting batteries don’t mix old and new batteries together.
Do not use rechargeable batteries.

Please leave these instructions with the end user where they should be kept in a safe place for
future reference.

Do not use rechargeable batteries.

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INTRODUCTION

The ERT20RF from SALUS Controls is a stylish and accurate dial thermostat. This thermostat has been
specically designed to be used for both Volt Free and AC heating applications, can replace most
common residential thermostats and is designed to be used with electric, gas or oil heating control
systems. Unlike ordinary single unit design thermostats, this is a new type of thermostat separating
the operational functions into two units.

The receiver is used for wiring connections and on/o control.
The thermostat provides the user interface and temperature sensing / control. The two units are linked
together by a Radio Frequency (RF) signal.

General Features

Volt free switching option

•

User friendly dial

•

Simple to use

•

16 Amp receiver

•

LED Indication

•

4 ERT20RF

INSTALLATION

Please read the important safety information at the start of this manual before you begin to install the device.

Thermostat

The ERT20RF Thermostat is easily installed using the back plate supplied with the unit – this is used
purely for mounting purposes, as no wiring is needed for the thermostat. The back plate can be mounted
directly to the wall surface.

The ideal position to locate the ERT20RF Thermostat is about 1.5m above oor level. It should be mounted
in a location where the thermostat is accessible, reasonably lit and free from extremes of temperature
and draughts. Do not mount the thermostat on an outside wall, above a radiator or in a location where
it may be subjected to direct sunlight.

To ensure trouble free operation of the Radio Frequency (RF) signal, always ensure that the thermostat
is mounted away from any possible sources of interference (such as radios, TV sets, computers, etc.), and
is not mounted on or in close proximity to large metal objects. Installing the ERT20RF in enclosed areas
such as cellars and basements is not recommended.

1. Mount backplate on wall and ensure correct
orientation.

2. Insert the 2 x AA batteries (supplied). If you
are installing for the rst time please put the
thermostat to one side and proceed to page 6.

For replacing the batteries reverse the process in step 3.
When the batteries need replaced the LED below the dial will ash

3. After RF pairing is complete on page 7 then
slide the thermostat onto the backplate ensuring
both sides are engaged. You will feel a positive
click when located properly.

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Receiver

NOTE: All electrical installation work should be carried out by a suitably qualied

Electrician or other competent person.

If you are not sure how to install this digital thermostat consult either with a qualied electrician, heating
engineer or your boiler / heating system supplier for advice on how to continue.

The ERT20RF Receiver should be mounted in a suitable location that is both accessible for the connection
of mains and control wiring, and allows good reception of the RF signal. The Receiver needs a 230V AC
mains supply to operate, and this should be fused appropriately (13A max.). The Receiver should be
mounted in a location where it will not come into contact with water, moisture or condensation.

The Receiver ON/OFF switch is accessible from the front face of the receiver, as shown in this picture:

On the front cover of the receiver you will see that there is
the ON/OFF switch and two LEDs. The bottom LED (RED) will
illuminate when the switch is in the ‘ON’ position and the
unit is receiving power. The top LED (GREEN) illuminates
when the receiver unit is receiving a heat call transmission
from the thermostat.

The wiring terminals are located on the rear of the receiver,
as shown in this picture:

6 ERT20RF

RECEIVER WIRING TERMINALS

Terminal Identier Description

1 NO Normally Open [N/O]

2 COM Linked Live feed (230V AC heating applications only)

3 L Live feed (230V AC)

4 N Neutral

TYPICAL WIRING INSTALLATIONS

a.Volt Free Installation

Notes:

• Receiver unit should have a permanent 230V AC main supply

• Conrm that the Boiler has an external thermostat loop and
is congured for Volt Free switching

ERT20RF 7

b. 230V Installation

SYNC

/OFF

EAT

Add Link

Notes:

• Receiver unit should have a permanent 230V AC main supply

• Conrm that the Boiler is congured for 230V switching

PLEASE DO NOT SWITCH THE RECEIVER ON UNTIL YOU ARE READY TO PAIR WITH THERMOSTAT

RF PAIRING

Switch on receiver and the RED LED should start ashing. If receiver was already switched on, switch
OFF then back ON again the RED LED should star t ashing.

Now press and hold the SYNC button on the rear of the thermostat for 3
seconds. The LED below the dial will start ashing.

Now check the LED on the receiver, once RF pairing is successful the LED
on the receiver will stop ashing

Now press and hold the SYNC button on the thermostat for 3 seconds.
The thermostat should now be paired with the receiver.

8 ERT20RF

Back of unit

TESTING THE RF TRANSMISSION

It is important to site both the receiver and thermostat in locations where the RF signal cannot be
interrupted.

The receiving range between thermostat and receiver is approximately 30 metres indoors, however
many factors can aect the RF transmission and shorten the operating distance, e.g. shielding by thick
walls, foil back plasterboard, metal objects such as ling cabinets, general RF interference, and so on.

The range is generally large enough for most household applications, to check the RF reception, follow
the following steps:

1. Turn the thermostat to 30ºC. The LED under the dial should come on.

2. Check the Green LED on the receiver unit - it should be lit and boiler should re.

3. Turn dial down to 5ºC. The LED under the dial should go o.

4. Wait for a few seconds and the Green LED should switch o. The boiler should also switch o.

5. If the operation of 1-4 is successful then you have a good RF link between the thermostat
and the receiver.

6. Return the dial to the preferred set temperature for the application.

If you are unable to get a stable RF connection between the receiver and thermostat, check that the
receiver is both switched on and has a mains supply (red LED illuminated). If this isn’t a problem then
try pairing the thermostat to the receiver again. See page 8.

ERT20RF 9

CONFIGURATION

COOL HEAT

COOL HEAT

COOL HEAT

Your ERT20 thermostat is congured for HEATING control and simple ON/OFF switching, however it can
be congured for COOLING. This is easily done by changing the “jumper” setting. The “JUMPER” peg is
located on the rear of the ERT20TX.

JUMPER Position

COOL HEAT

Default

SYNC

Default HEAT COOL

10 ERT20RF

SETTING ROOM TEMPERATURE

The temperature can be changed by rotating the dial.
The position of the dial allows the user a clear
indication of the required room temperature, and the
status of the heating system.

Temp set for 15ºC

When the ERT20RF is demanding heat. The red led
below the dial will glow. When the correct temperature
has been reached then the LED will go out.

If LED is ashing continuously in normal
operation then the batteries need replacing.

FROST PROTECTION

Set the dial to 5ºC this will provide protection from
freezing temperature.

Temp set for 5ºC

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MAINTENANCE

The ERT20RF electronic thermostat requires no special maintenance. Periodically, the outer casing can
be wiped clean using a dry cloth (please DO NOT use solvents, polishes, detergents or abrasive cleaners,
as these can damage the thermostat).

There are no user serviceable parts within the unit.

Should the ERT20RF electronic thermostat fail to function correctly, check:

The batteries are the correct type, tted correctly and are

•

not exhausted - t new batteries if in doubt. LED will ash continuously when battery power is low.
Heating or Cooling system is switched on.

•

The ERT20RF receiver is switched on. Note in the event of the receiver being switched o or a power

•

cut the receiver LED will ash for 10 minutes. The LED will eventually stop ashing and return to
normal. Check jumper on the rear are set to your required application.

WARRANTY

SALUS Controls warrants that this product will be free from any defect in materials or workmanship,
and shall perform in accordance with its specication, for a period of two years from the date of
purchase. SALUS Controls sole liability for breach of this warranty will be (at its option) to repair or
replace the defective product.

12 ERT20RF

PRODUCT SPECIFICATION

General

Model: ERT20RF
Type: Electronic thermostat, designed for Volt

Frequency 868 MHz

Thermostat

Temperature Scale: Celsius
Range: 5 ºC to 30 ºC
Resolution: 0.5 ºC
Tolerance: Less than ± 0.5 ºC at 25ºC

Frost protection setpoint: 5 ºC

Free and AC heating applications.

Power Source: 2 x AA alkaline batteries

Receiver

Power Source: 230V AC / 50Hz

Switch Rating
Switching Voltage: 0 - 230V AC / 50Hz
Switching Current: 16A resistive, 5A inductive
Protection Rating: IP30

Environment

Operating Temperature: 0 ºC to + 40 ºC
Storage Temperature: - 20 ºC to + 60 ºC

(don’t use rechargeable batteries)

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For more products in the
SALUS range visit...

www.salus-tech.com

14 ERT20RF

WARRANTY

ERT20RF Warranty

SALUS Controls warrants that this product will be free from any defect in materials or workmanship, and
shall perform in accordance with its specication, for a period of two years from the date of purchase.
SALUS Controls sole liability for breach of this warranty will be (at its option) to repair or replace the
defective product.

Customer Name: ....................................................................................................................

Customer Address: .................................................................................................................

............................................................................... Post Code: ..............................................

Tel No: ........................................................ Email: ................................................................

Engineers Company: ..............................................................................................................

Tel No: ......................................................... Email: ...............................................................

Instalation Date: ....................................................................................................................

Engineers Name: ...................................................................................................................

Engineers Signature: .............................................................................................................

ERT20RF 15

SALUS Controls plc

SALUS House
Dodworth Business Park South,
Whinby Road,
Dodworth, Barnsley S75 3SP
UK.

SALES: T: +44 0 1226 323961

E: [e-mail]

TECHNICAL: T: +44 0 1226 323961

E: [e-mail]

www.salus-controls.com

SALUS Controls is a member of the Computime Group

Maintaining a policy of continued product development SALUS Controls plc reserve the right to
change specication, design and materials of products listed in this brochure without prior notice.

Issue Date: Feb 2014

00089 Ver009