Salus ERT50 230v Instruction Manual

Instruction Manual

Model No
ERT50 230v

ERT50 230v
Digital Room Thermostat
for Underfloor
Heating Applications

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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.

These instructions are intended to apply in the
United Kingdom only, and should be followed along
with any other statutory obligations.

This accessory must be fitted 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.

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

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INTRODUCTION

A programmable thermostat is a device that combines the
functions of both a room thermostat and heating
controller into a single unit. The programmable
thermostat is used to switch the heating system in your
home on and off as needed. It works by controlling the
temperature according to a series of programmed settings
that take effect at different times of the day.

The ERT50 230v from Salus Controls is a stylish and
accurate digital room thermostat that is fitted with a large
easy to read Liquid Crystal Display (LCD). The ERT50 230v
benefits from simple one-touch operation, and this
controller has been specifically designed to be used with
underfloor heating systems.

Features

•

12/24 Hour Clock with Daylight Saving feature

•

Key lock Function

•

3 Preset and 2 User Profiles

•

Comfort/Standard/Reduced Temperature Zones

•

Night Setback

•

8 different languages selection

•

Auto/Manual Mode

•

PWM or On/Off Output

•

Heat/Cool selection

•

Holiday Function

•

Frost Protection

INSTALLATION

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

The ideal position to locate the ERT50 230v digital room
thermostat is about 1.5m above floor level. It should be
mounted in a location where the thermostat is easily
accessible, reasonably lit and free from extremes of
temperature. The electrical connections to the ERT50
230v are made to the internal terminal strip. Connection
details are shown below - no Earth connection is required
for the correct and safe operation of the thermostat as the
device is double insulated.

After installing the ERT50 230v in a suitable location, wiring
connections can be made as shown above. The following
criteria apply to the installation:

• The incoming AC mains supply should be 230v AC
and fused at 2 amps.

• Optimum cable size for installation is 1.5 mm

2

; wiring
colours should be in accordance with the current
requirements of the IEE Wiring Regulations.

• All wiring connections should be securely made, and be
firmly terminated within each of the terminal screw clamps.

Do not restore the mains supply to the system until all
associated items are fully installed.

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TERMINAL CONNECTIONS

Take the wiring only in accordance
with the wiring diagram below:

230v Version

Connection

L2 Line 2

Supply reduction

Switching output

L1 Line 1

NOTE: All electrical installation work should be carried out by a
suitably qualified Electrician or other competent person. If you
are not sure how to install this programmable thermostat consult
either with a qualified electrician, heating engineer or your boiler
/ heating system supplier for advice on how to continue.

Do not remove or refit the ERT50 230v wiring without
the mains supply to the system being isolated.

SYSTEM INITIAL

After connecting 230v or pressing reset button, please select
the Language, Date and Time. The installed firmware version
will be displayed, the backlight will turn on and then the Start
Up display will be shown prompting you to select the
Language and to set the Date and Time.

Press + or - to select language then press Select buttons to
confirm language Remark: The default is English.

LCD prompts user to select Date, time and Daylight Saving.
Press + or - to change the value of Date, 24/12hr, Time and
Daylight Saving. Press Select buttons to next setting values.
Remark: DD/MM/YY is different for the different language.

Basic Settings

Many of the ERT50 230v configuration and operating
settings can be changed here. Press any key to turn on the
backlight, press CANCEL key, press and hold the SELECT
and CANCEL keys together to enter program setting press
+ or - key to "Basic Setting", and press SELECT.

To change any of the basic settings, press the SELECT this
will access the Program/Basic settings menu.

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Use the PLUS (+) or MINUS (-) keys to choose the item you
want to change and press the SELECT key to change to the
setting menu for that item. Pressing the CANCEL key will
exit from this menu and return you to the previous menu.

DATE AND TIME:

Press the PLUS or MINUS key to change the day setting,
then SELECT to save your choice. Do exactly the same for
the month and year. You can then choose whether to use
a 12 or 24 hour time display (the default is 24 hour).

The time is set in the same way as the date – use the
PLUS or MINUS keys to change the setting, and save
by pressing SELECT.

The last menu item is Daylight Saving – by default this is
turned on. Change the setting using the PLUS or MINUS keys,
then press the SELECT key to save the settings and return to
the Program/Basic settings menu.

LANGUAGE:

The ERT50 230v is programmed to operate in eight
different languages (the default is English). If you wish to
change the language used, select Language from the
Program/Basic Settings screen.

Select your choice of language with the PLUS or MINUS
keys, then press SELECT to save your choice and return to
the Program/Basic Settings screen.

Pressing CANCEL will return to the previous screen
without saving any changes.

MAINTENANCE:

The Maintenance menu allows you to view operating
times for the heating system. The ERT50 230v will record
operating time up to a maximum of 99,999 hours.

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Select the Read Operating Time entry to see a summary of
the system operating times.

This screen will show the date the operating times were
last reset, total operating time and total actuator open
time.

The timers can be reset by selecting the Reset Operating
Time item

Select Yes and then press the SELECT key to reset the
timers to 0.

Press the CANCEL key to return to the previous menu.

CONTROL SETTINGS

The Control menu allows changes to the Temperature
Span, Communications, Frost Protection, Output, Valve
Protection and Temperature Offset settings.

To access this menu, select the Control item from the
Program menu.

Temperature Span:

The first setting that can be changed is Temperature Span.
The default setting is 0.5 °C, but this can be changed to

1.0 °C. Press the SELECT key to save your changes.

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SETBACK FUNCTIONS:

The internal temperature reduction (setback) function
allows you via a hard wired connection to reduce the set
temp of all the remote thermostats (ERT20/ERT30) in your
system at a pre-selected time and duration. The level of
temperature reduction is selected in the ERT50 (via
software) and ERT30 (manually).

Please note that the ERT50 comes to you with the setback
function enabled. If you require this function disabled
please follow the steps below.

The ERT30 requiresthe required temp reduction to be set
by the “jumpers” (show pic) inside the unit.
The temperature reduction for all controls are 2ºC or 4 ºC.

To deactivate NSB enter PROG/CONTROL menu,
press SELECT then using the PLUS or MINUS keys
to select ON/OFF. Press select to save settings.

FROST PROTECTION:

Selecting the Frost item in the menu allows you to turn
the frost protection mode of the ERT50 230v on or off (the
default setting is On).

The Frost Protection mode temperature is preset at 5 ºC;
this temperature is factory set and cannot be adjusted.

The Frost Protection mode indicator will flash to
indicate Frost Protection mode is active.

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OUTPUT:

By selecting the Output menu item, you can change the
control method used by the programmable thermostat ­either Pulse Width Modulation (PWM) or On/Off. The
default setting is PWM.

PWM only functions when the controller is operating in
Heat mode.

VALVE PROTECTION FUNCTION:

The Valve Protection (VP) function is provided as a way to
avoid the control valve from sticking or seizing when not
being used for long periods (e.g. during the summer).

This function is enabled by turning the Valve Protection
feature on or off using the PLUS or MINUS keys (default
setting is On).

When enabled, the VP function will turn on the
thermostat output to operate the control valve for a
period of 5 minutes every week - the Valve Protection
function will still operate even if the room temperature is
higher than 35 °C.

TEMPERATURE OFFSET:

The Temperature Offset menu item is an adjustable
setting that allows calibration of the controller to match
the ambient temperature. The Offset can be adjusted
between –3.5 °C and +3.5 °C in 0.5 °C steps.

Use the PLUS and MINUS keys to adjust the Offset setting,
and save your changes by pressing the SELECT key. After
saving the setting, the ERT50 230v will revert back to the
Program menu.

Pressing CANCEL will return you to the Program menu
without saving your changes.

HEAT/COOL:

The Heat/Cool menu allows you to select the ERT50 230v’s
operating mode (heating or cooling).

Select your choice of mode using the PLUS and MINUS
keys, and save using the SELECT key.

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Changing the operating mode will also exchange the
Comfort with Reduced temperature settings. The ERT50
230v screen will look like this in Heating mode:

…and like this when in Cooling mode.

If the Reset Button is pressed, the ERT50 230v will behave
in the same way as described above, except that most
previously saved user setting will remain.

Function Factory Default Value

Operation Mode Normal
Room Temperature 24 ºC, updated within 5 seconds
Display Mode Full Screen
Date Format DD/MM/YY
Clock 00:00 (24 hour)
Day Fri 01/01/10
Key Lock Off
Holiday On/Off Off
Program On/Off On
Language English
Timers 0 hours
Heat/Cool Heat
Span 0.5 °C
NSB (setback) On
Frost Protection Off
Output Mode PWM
Valve Protection On
Offset 0 °C
Output Off
LCD Backlight Off
Daylight Saving On

N.B: Please be aware that after a Reset, the ERT50 230v
output relay may turn ON if the room temperature is
lower than the Set Point temperature.

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USER INTERFACE AND CONTROLS:

The status and operation of the ERT50 230v can be clearly
seen on the large orange backlit Liquid Crystal Display
(LCD) - this display allows the user to see at a glance the
current status of the heating system.

There are few user controls for the ERT50 230v, making
the controller very easy to operate.

The MENU, PLUS (+), MINUS (-) and RESET keys are easily
accessible on the front panel of the controller, just below
the display. The SELECT and CANCEL keys are accessible
after opening the hinged cover on the front of the
controller.

These controls are shown below, along with a description
of each of their functions.

USER CONTROL FUNCTION SUMMARY:

Key/Operation Symbol Functions

MENU key Activates the menu function

of the ERT50 230v

MINUS (-) key Decreases the selected setting

PLUS (+) key Increases the selected setting

RESET button Resets the controller to default

(original factory) settings

SELECT key Selects or saves the currently

highlighted menu or setting

CANCEL key Cancels the current selection

or exits the active menu

OPERATION

As previously described, the ERT50 230v is configured and
adjusted by the use of an intuitive user interface with a
minimal number of user controls, and the backlit LCD
gives a highly visible, easily readable indication of the
thermostat status.

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LCD INDICATOR FUNCTION SUMMARY:

Indicator Symbol Function

FROST (left Indicates frost protection
hand side mode is active.

– flashing)

TEMPERATURE Indicates either current room

temperature default is 24℃
or set point temperature.

COOLING Indicates cooling mode is active.

HEATING Indicates heat control

mode is active.

KEY LOCK Indicates key lock is turned on.

MANUAL Indicates the controller is

operating in manual mode.

HOLIDAY Indicates holiday mode is active.

FAMILY Preset (predefined) profile for

family environments.

SINGLE Preset (predefined) profile for

single user environments.

OFFICE Preset (predefined) profile for

office environments.

NAME 1 User definable and

re-nameable profile.

NAME 2 User definable and

re-nameable profile

PROFILES:

The ERT50 230v has a number of preset profiles that
simplify installation and setup. The profiles contain
default settings that should meet the majority of needs in
a range of environments, meaning that the controller can
work ‘out of the box’ with no reprogramming. The five
preinstalled profiles are:

FAMILY

SINGLE

OFFICE

NAME 1

NAME 2

Each profile has settings for 7 weekdays, 6 different times
of day and 3 different temperature zones:

Time of Day Start End

Early Morning 06:00 08:00
Morning 08:00 12:00
Noon 12:00 14:00
Afternoon 14:00 18:00
Evening 18:00 23:00
Night 23:00 06:00

Temperature Zone Setting
(heating mode)

Standard 20.0 °C
Comfort 24.0 °C
Reduced 16.0 °C

Programming the ERT50 230v is very easy, and only needs
you to select a combination of times of day and
temperature zone, as in these examples:

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Example 1 – Profile=Family, Days=Mon-Fri

Early Morning 06:00 08:00 Comfort

Morning 08:00 12:00 Standard

Noon 12:00 14:00 Comfort

Afternoon 14:00 18:00 Standard

Evening 18:00 23:00 Comfort

Night 23:00 06:00 Reduced

Example 2 – Profile=Single, Days=Mon-Fri

Early Morning 06:30 07:30 Comfort

Morning 07:30 12:00 Standard

Noon 12:00 15:00 Comfort

Afternoon 15:00 16:00 Standard

Evening 16:00 00:00 Comfort

Night 00:00 06:30 Reduced

EVERYDAY FUNCTIONS (EDF)

The ERT50 230v gives the user the option of three
different idle screen display modes, depending on the
user’s preference: Full screen, Selected screen or Basic
Screen. In all three idle screen modes, the displayed
temperature is the current room temperature.

Full Screen:

In full screen mode the weekday, date, time, temperature,
heat or cool, time of day, temperature zone and profile
are displayed.

Selected Screen:

In selected screen mode the weekday, date, time,
temperature, heat or cool and profile are displayed.

Basic Screen:

In basic screen mode only the temperature, heat or cool
and profile are displayed.

MANUAL CHANGES

Pressing the CANCEL button twice will allow you to access
the Menu screen as shown here.

Pressing the PLUS or MINUS keys will allow you to change
the set temperature up or down as shown in the examples
below:

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This change to the set temperature will temporarily
overwrite the programmed set temperature – at the next
programmed switch point, the programmed temperature
will become active.

Pressing the MENU key will allow you to change display,
profile and holiday settings.

Change Display:

Select an option by using the PLUS or MINUS keys and
pressing the SELECT key.

Change Profile:

As previously, select an option by using the PLUS or
MINUS keys and pressing the SELECT key.

Change Holiday:

The Holiday function allows the user to decrease the room
temperature down to the ‘Reduced’ temperature for a
programmed period of time. The user has to set the
Holiday period Start and End times.

As normal, change the selected option by using the PLUS
or MINUS keys, and confirm the selection using the
SELECT key.

After changing the minutes part of the End time, you can
save your settings by pressing the SELECT key, or press the
CANCEL key to exit without saving.

The Setback function will still operate in Holiday mode. At
the end of the Holiday period, normal programmed
control will resume.

After saving the Holiday settings, the display will return
to the menu screen. If Holiday is turned On, the full screen
display will show the Holiday function icon.

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PROGRAM ON/OFF:

You have the option to turn off Program mode and use
the ERT50 230v in Manual mode. To turn Program mode
off, use the PLUS or MINUS keys to select the Program Off
menu item, then press the SELECT key.

This will then allow you to access the Manual/Program
menu screen: use the PLUS and MINUS keys to select your
option and press SELECT to confirm.

Choosing Program Off will stop the ERT50 230v operating
in Programmed mode until the user selects Program On
again. Any previous Holiday mode settings will be
cancelled, and Holiday mode cannot be selected until
Program On is reselected.

Select the Program On menu item to resume Programmed
control and return to the active programmed profile.

PROGRAMMING

The ERT50 230v makes programming a very
straightforward operation because of the intuitive menu
structure. To access the Programming menu, you need to
press the CANCEL key, and then press the SELECT and
CANCEL keys together.

The Program menu has five options: Profiles, Temperature
Zones, Basic Settings, Control and Heat/Cool. Here we will
only cover programming the Profiles and Temperature
Zones, as the other settings have been covered elsewhere.

Profiles:

Selecting the Profile menu item from the Program screen
will open a new menu listing the five installed Profiles.

Use the PLUS or MINUS keys to select the profile that you
want to work with, and press the SELECT key to open the
setting menu for that profile. Press the CANCEL key to exit
to the previous menu without making changes.

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Each profile contains the settings for the six times of day
for each day of the week and connects one of the three
temperature zones to each programmed step.

First of all choose if you want to program weekdays,
weekends or individual days of the week - you can also
start with weekday settings and later change the settings
for a single day, or start with Monday and copy these
settings into the other days.

Next, you can set the switching point for the time of day:

For every time of day you need a Start and End time (there
cannot be any gaps between each End time and the next
Start time).

After selecting the menu item the cursor will be at the first
field next to the Start time for Early Morning – this will be
set at its default setting. The default Start and End times are:

Time of Day Start End

Early Morning 06:00 08:00
Morning 08:00 12:00
Noon 12:00 14:00
Afternoon 14:00 18:00
Evening 18:00 23:00
Night 23:00 06:00

Use the PLUS or MINUS keys to change the highlighted
setting, and press the SELECT key to confirm the setting and
move to the next setting. Press the CANCEL key to exit to
the previous menu without making changes. An example of
setting changes is shown in the following images:

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Pressing the SELECT key will save your changes and return
you to the Time of Day setting menu. You use exactly the
same procedure to alter time settings for weekends.

The procedure for setting times for a single day is basically
the same. Select Single Day from the Setting menu then
choose the Day you would like to programme.

Press the SELECT key on the highlighted day and change
the time settings as you did previously.

Once an individual day has been programmed, you can
copy the settings to other days very easily by using the
Copy menu item.

In this example, we will copy the settings we made earlier
for Monday, and copy them to Sunday.

Press the SELECT key with Monday highlighted, then use
the PLUS or MINUS keys to scroll to Sunday. Press the
SELECT key again and all the settings will be copied.

It is also possible to copy settings from one profile to
another by using the Copy From menu item – please be
aware that this function only allows you to copy settings
from profile to profile: you cannot copy settings within a
profile using this option.

In this example, we will copy the settings from the Office
profile into the Family profile:

Highlight the profile you want to copy from using the PLUS
or MINUS keys then press the SELECT key to copy the profile
settings.

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You can also if you wish rename a profile by using the
Rename menu item.

Each profile can be renamed with a maximum of six
characters (letters and numbers): in this example we will
rename the Family profile to A1b2CA.

Use the PLUS or MINUS keys to change each character and
confirm your choice with the SELECT key. On reaching the
last character, the option to save the new name will
appear – press the SELECT key to save your changes, or
CANCEL to exit without saving.

TEMPERATURE ZONES:

The ERT50 230v has three pre-programmed temperature
zone settings – the default settings of Heating Mode for
each zone are:

Temperature Zone Setting

Standard 20.0 °C
Comfort 24.0 °C
Reduced 16.0 °C

The settings for each zone can be changed by selecting the
Temperature Zones menu item. Pressing the SELECT key will
access the Temp. Zones setting menu.

Each zone temperature can be changed using the PLUS or
MINUS keys. Pressing the SELECT key will move to the next
zone setting.

The settings for each zone cannot be set lower than 10 °C or
set higher than 35 °C.

After setting the Reduced temperature setting, pressing the
SELECT key will save your choices and exit back to the
previous screen.

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OTHER FUNCTIONS AND CONTROLS

Backlight

The backlight of the ERT50 230v is switched on
automatically whenever any of the keys are pressed. The
backlight will remain illuminated for approximately 10
seconds after the last key press. If the room temperature
is higher than 35 °C, the backlight will blink on and off.

The backlight will not illuminate if there is no mains
supply to the controller.

Control Status

The ERT50 230v indicates on the LCD the control status
by using a selection of display icons.

Heating:

The display will show the word ‘Heat’ and an animated
flame icon when in HEATING mode.

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Cooling:

The display will show the word ‘Cool’ and an animated
snowflake icon when in COOLING mode.

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KEY LOCK

The ERT50 230v has a Key lock function that helps to
prevent accidental changes to the controller settings. Key
lock is turned on or off by pressing and holding the PLUS
and MINUS keys together for a few seconds.

When Key lock is active, the Key lock indicator will be
displayed on the left side of the display:

If you press any of the keys when Key lock is active, the
screen display will change:

Press the PLUS and MINUS keys together for a few seconds
to turn Key lock off.

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POWER MONITOR

The ERT50 230v monitors the incoming AC mains supply. If
the power fails or is turned off, the controller will behave in
the following way:

• LCD display turn off

• All outputs (triac and relay) will turn off

• All settings (including time and date) will be
saved to the internal EEPROM

RESET BUTTON

The Reset Button is provided as a way to restore the
controller once the unit fails to function. Some settings may
be lost and cannot be restored.

ENERGY TIP

One way to set and use your room thermostat is to find the
lowest temperature setting that you are comfortable with,
and then leave it set at this temperature. You can do this by
setting the room thermostat to a low temperature, (for
example 17 °C) and then increasing the setting by one
degree each day until you are comfortable with the room
temperature - you won’t have to adjust the thermostat
further, as adjustment above this setting will waste energy:
a 1 °C increase in temperature is equal to 3% of your
heating costs.

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MAINTENANCE

The ERT50 230v digital room 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; any
servicing or repairs should only be carried out by Salus
Controls or their appointed agents.

Should the ERT50 230v room thermostat fail to function
correctly, check:

• Mains supply to the ERT50 230v is switched on.

• Heating system is switched on.

• If the ERT50 230v is still not functioning correctly,

press the Reset Button.

WARRANTY

Salus Controls warrants that this product will be free from
any defect in materials or workmanship, and shall perform
in accordance with its specification, 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.

PRODUCT SPECIFICATION

Model: ERT50 230v
Type: Programmable digital room

thermostat designed for
underfloor heating or
cooling applications.

Programming

Programming Modes: User selectable for 7 weekdays,

6 different times of day,
3 different temperature zones
and 5 different profiles.

Override Facility: User selectable programme

override facility.

Holiday Facility: User selectable option to

temporarily override selected
programme

Clock

Format: User selectable 12 or 24

hour format
Accuracy: ± 1 minute per month
Clock retention duration: typ. 8 hours

Power Supply

Power Source: 230v AC / 50Hz

Memory Backup

Type: Electrically Erasable

Programmable Read Only

Memory (EEPROM)

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Switching - Control

Switching Voltage 230v AC / 50Hz
Switching Current: 4(2)A

Switching - Setback

Switching Voltage: 230v AC / 50Hz
Type: Relay

Operation

Control Method: 1. PWM control (default)

2. On – Off control

Temperature Measurement

Temperature display range: 5.0 ºC – 45.0 ºC
Temperature display resolution: 0.5 ºC

Temperature setting range: 10.0 ºC – 35.0 ºC
Temperature setting resolution: 0.5 ºC

Frost protection setting: 5.0 ºC

Environment

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

Salus Controls warrants that this product will be free from

any defect in materials or workmanship, and shall perform

in accordance with its specification, 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.

ERT50 230v Warranty

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

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

.........................................................................................

.........................................................................................

Post Code: ......................... Tel No: ..................................

Email: ..............................................................................

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

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

Email: ..............................................................................

Intallation Date: ...............................................................

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

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

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Sales

:

Email: [e-mail]

Tel: [phone]

Technical

:

Email: [e-mail]

Tel: [phone]

Salus Controls plc, Salus House,

Dodworth Business Park South,

Whinby Road, Dodworth, Barnsley S75 3SP

salus-tech.