ESI ESRTP4+ User manual

ESRTP4+
Programmable Room
Thermostat
User Instructions

Thank you for choosing ESi Controls.
All our products are tested in the UK so we are
confident this product will reach you in perfect
condition and give you many years of service.
However, for additional peace of mind, we
recommend you register your product online at
www.esicontrols.co.uk/warranty for your
extended warranty.
User Instructions
1. What is a Programmable Room Thermostat?
1.1 The ESRTP4+ explained 6
1.2 Introduction to the ESRTP4+ 7
1.3 What is Chronoproportional Controls (TPI)? 7
1.4 What is Delayed Start? 8
1.5 What is Optimum Start? 9
1.6 What is Optimum Stop? 9
1.7 What is Landlord Service? 9
2. Quick Operating Guide 10
3. Operation Modes
3.1 Factory Pre-Set Programme 12
3.2 Setting the Operation Mode
(5/2 day, 7 day or 24hr) 13
3.3 Setting the Programme 13
3.4 All Day Setting 14
3.5 Permanent Manual Overrides 14
3.6 Temporary Manual Overrides 14
3.7 Holiday Mode 15
3.8 Frost Protection 16
4. Programme Settings
4.1 Setting the Time and Date 17
4.2 Using the Copy Function 17
4.3 Battery Replacement 18
4.4 Resetting the Unit 18
Contents
23

45
User Instructions

6 7
1.1 An explanation for householders
Put simply a Programmable Room Thermostat is a timer and
thermostat combined in one unit. With a standard timer you
choose your heating ON times and set your room thermostat
(fitted usually away from the timer) to the desired comfort
temperature required. With a Programmable Room Thermostat
this is done within just one unit. i.e. for your heating ON times
you assign a comfort temperature to those times.
The added bonus is that you can also attach a chosen
temperature to the OFF time of your heating. This is called
the set back temperature and is designed to prevent the
temperature in the house falling below a pre-set temperature
while the heating is programmed OFF. The advantage to this
function is that by narrowing the gap between OFF house
temperature and ON house temperature (usually 20°C)
less energy will be required to bring the house temperature
back up to 20°C when the heating is turned back ON. The
recommended set back (OFF) temperature is 16°C, although
it can be set higher or lower depending on personal choice
(scale is 5°C - 35°C).
Having this function can be of assistance to elderly people
as it prevents the house getting too cold when heating is
programmed OFF.
N.B. The unit is capable of operating in an air conditioning/
cooling mode also. See instructions for further details.
1.2 Introduction to the ESRTP4+
The ESRTP4+ is an easy to install and use 7 Day, 5/2 Day or
24 Hr Programmable Room Thermostat which offers four or
six time and temperature changes each day, with different
programmes available for weekdays and for weekends. It is
designed to provide automatic time and temperature control
of heating systems in domestic or light commercial premises.
A large backlit LCD screen and easy-to-use function buttons
ensures simplified programming and operation for all users.
Your ESi Controls Programmable Room Thermostat includes
special features designed to save you energy. These features
are factory set to be OFF to enable the homeowner to choose
whichever features are preferred. Also, please note these
features only apply to your home heating and not the hot
water system.
1.3 What is Chronoproportional Control (TPI)?
A chronoproportional (or TPI) room thermostat makes boilers
operate more efficiently and provide close accurate control.
Chronoproportional control is a load compensator as it
ensures that the boiler ‘ON’ time is reduced to a minimum
and matches the boiler heat output with the heat loss. This
reduces the net temperature of the return water to the
boiler. This is due to the TPI (Time Proportional and Integral)
advanced energy saving feature.
Rather than just a simple ON/OFF control, like other domestic
room thermostats, room thermostats with TPI increase
boiler efficiency by firing the boiler at regular intervals,
adjusting firing duration with demand, to maintain set room
temperatures. This gives them a great advantage over other
domestic room thermostats and achieves a constant ambient
environment for the user e.g. if a property only has a simple
1. What is a Programmable
Room Thermostat?

8 9
mechanical thermostat installed, the energy saving benefits
of a replacement high efficiency condensing boiler will not
be realised as the boiler will rarely be running in condensing
mode. Heating and hot water can account for over 80%
of total household energy usage. Chronoproportional (TPI)
thermostats can provide great cost savings. It can be used
on any boiler, with underfloor and radiator systems, zoned
heating and electric heating systems. The use of an electronic
thermostat with chronoproportional capability provides closer
temperature control plus possible reductions of 10% in both
fuel cost and carbon emissions. This thermostat has the
option of standard setting or TPI.
1.4 What is Delayed Start?
Thermostats with the Delayed Start function have been
shown to reduce heating costs by as much as 10%. This
feature delays the start-up of the heating, depending on how
warm the room temperature is at the time when the central
heating is due to come on.
The heating start can be delayed for up to 45 minutes if the
room is already relatively warm, when the weather is milder
for example. This often reduces how long the heating is on
per day, with no comfort loss, saving you energy and money!
The Delayed Start feature can be fully automated and needs
no extra programming.
1.5 What is Optimum Start?
The Optimum Start adjusts the starting time for home
heating according to the temperature measured within the
building. Instead of setting an arbitrary time for the heating
to come on, the homeowner programmes the time that the
home should be at the desired temperature. Up to 10% of
domestic energy costs can be saved, as the warm up time is
automatically reduced according to the ambient temperature.
Many homeowners set their heating to start a couple of
hours before getting up to avoid waking up to a cold house.
With the Optimum Start function you don’t need to do this.
The actual start time is automatically delayed or advanced
to ensure your home reaches the set temperature by the
programmed time.
1.6 What is Optimum Stop?
Optimum Stop saves energy by switching the boiler off a
little earlier than the programmed OFF time. If the house is
up to temperature, you should not notice the effect on the
temperature but you should see a difference in your energy bill.
1.7 What is Landlord Service?
The optional Landlord Service safety feature offers protection
for tenants and landlords against illegal boiler negligence (in
compliance with Gas Safety Regulation 36). 30 days before
the boiler is due to be serviced, the LCD will display SER. If the
annual maintenance is not carried out before the 30 days, the
system will only run for a pre-determined number of minutes
per hour before turning off.

2. Quick Operating Guide
1Home (takes you back to home screen)
2Next (moves you to next option within a function)
3Temporary Override/Settings Adjustment
4Accepts/Confirms selection in functions/All Day Mode
5Copy (COPY)
6Holiday Mode
7Sets Time and Date
8Selects and adjusts Programme (PROG)
9Places Thermostat into Frost Protection Mode (OFF)
10 Places Thermostat into Manual Mode (MAN)
11 Runs Programme (AUTO)
12 Reset
13 Day Display
14 Room Temperature
15 Frost Protection Mode
16 Time Display (12 hour
AM/PM or 24 hour)
17 Holiday Mode symbol
18 Flame symbol when
system calling for heat
19 Operation Mode symbol
& Auto Mode symbol
20 Programme Events Display
& All Day symbol
21 Delayed Start (DS) /
Optimum Start (OS) is
active
22 Date (DD-MM-YYYY)
23 Annual Service is due
(SERV)
24 Optimum Stop (OST) is
active
25 TPI is active
26 Manual Mode symbol
27 User Set Temperature
28 Low Battery Warning
TIME/DATE PROG OFF MAN AUTO
A C H
AM
PM
SET
AUTO DS OS SER OST TPI MAN
°C
AM
PM
SET
AUTO DS OS SER OST TPI MAN
°C
TIME/DATE PROG OFF MAN AUTO
A C H
AM
PM
SET
AUTO DS OS SER OST TPI MAN
°C
AM
PM
SET
AUTO DS OS SER OST TPI MAN
°C
1
2
98 10711 12
13 14 15 16 17
18 19 20 22 23 24 25 26 27 2821
3
4
5
6
10 11

12 13
3. Operation Modes
3.1 Factory Pre-Set Programme
This Programmable Room Thermostat has been designed
to be a simple to use thermostat, requiring minimal user
intervention with a pre-programmed heating profile. The pre-
set heating times and temperatures will suit most people (see
table below). To accept the factory pre-set programme, move
the slider to AUTO which will revert the thermostat to Run
Mode (the colon (:) in the LCD display will begin to flash).
Pre-Set Temperatures: 5/2 Day
Pre-Set Temperatures: 7 Day
In 7 day setting, the pre-set settings are the same as the 5/2
Day programme.
Pre-Set Temperatures: 24 Hours
In 24hr setting, the pre-set settings are the same as Mon-Fri
of the 5/2 Day programme.
3.2 Setting the Operation Mode (5/2 day, 7 day, 24hr)
1. Switch the slider to PROG.
2. Press +/– buttons to move between 7 day, 5/2 day or
24hr operation.
5/2 Day operation is shown by MO, TU, WE, TH, FR
flashing (5 Day) and then SA, SU flashing (2 Day)
7 Day operation is shown by just one day flashing at
a time
24 hr operation is shown by MO, TU, WE, TH, FR, SA, SU
flashing at the same time.
3. Wait 15 seconds to automatically confirm and return
to Run mode or press Next to move to ‘Setting the
Programme’.
3.3 Setting the Program
1. Choose between 5/2 day, 7 day or 24 hr operation (see
above steps 1-2).
2. Press the Next button. The time will flash and P1 will
be displayed (the 1st temperature event).
3. Press +/– to set the time (10 minutes increments). Press
the Next button and the temperature will flash.
4. Press +/– to set the temperature (increments of 0.5°c).
Press the Next button to go to the next time
temperature event (e.g. P2).
Key Event Time Temp Event Time Temp
Week Days
1 06:00 20°C
Weekends
1 07:30 20°C
2 08:00 15°C 2 09:30 20°C
3 12:00 15°C 3 11:30 20°C
4 14:00 15°C 4 13:30 20°C
5 17:00 21°C 5 16:30 21°C
6 22:00 15°C 6 22:30 15°C
N.B. If 4 events is chosen the events 3 & 4 are skipped

5. Repeat steps 3 - 4 for all temperature events.
6. Press A to accept/confirm temperature events and move
to the next day/block of days.
7. Repeat steps 3 - 6 until all days have been set. Then wait
15 seconds to automatically confirm and return to run
mode or press the Home button.
3.4 All Day Setting
1. Switch the slider to AUTO.
2. Press the Abutton under the fascia. The display will now
show AL (All Day).
3. Press the +/– button to set the temperature (increments
of 0.5°c).
4. The mode will quit by 00.00 that day. Press the
Home button to cancel and return to Auto Mode.
3.5 Permanent Manual Overrides
1. Switch the slider to MAN. MAN will appear in the display.
2. Press +/– to adjust the temperature to the desired setting.
This will set a constant temperature 24hrs a day.
3. Switch the slider to AUTO to revert back to Auto mode.
3.6 Temporary Manual Overrides
1. To temporarily override the Programmable Room
Thermostat status or temperature press the +/– buttons
The Programme Events Display (e.g. P1) will no longer
be shown.
2. Press the +button to increase the set temperature
in increments of 0.5°c and/or press the –button to
decrease the set temperature in increments of 0.5°c.
3. Once the desired temperature is reached (and after
approx. 6 seconds) the time display will be replaced by a
display indicating the time left to the next programme
(the length of time the temporary override will run, if left
unhindered) and the display then alternates between
the time left and the current time. When the next ON/
comfort programme is arrived at, the temporary override
will end and Auto mode is reactivated.
4. Press the Home button to cancel this function and
reactivate Run mode.
3.7 Holiday Mode
Holiday Mode saves energy by letting you reduce the
temperature for 1 to 99 days while you are away from home,
resuming normal operation on your return.
To Set the Holiday Mode:
1. Make sure the Programmable Room Thermostat is in
Auto mode. Press the Hbutton, underneath the fascia
and the suitcase symbol will appear on the display and
the number of days will flash.
2. Press +/– to set the number of days you will be away.
3. Press the Next button and the temperature will flash.
Press +/– to set the desired temperature.
4. Press the Next or Home button, or wait 15
seconds to automatically confirm.
5. The number of days chosen will alternate with time symbol
on display and the number of days will count down.
6. Once the countdown has finished the thermostat will
return to normal operation. It may be advisable to set
the Holiday Mode 1 day less so the house is back up to
temperature for your return.
14 15

7. To cancel the Holiday Mode setting or to exit the function
at any time, press the Home button to revert back to
Run mode.
3.8 Frost Protection
This function is provided as an option if it is desirable to turn
the heating off permanently. It is usually used in summer.
To set the Frost Protection Mode:
1. Switch the slider to OFF to enter the Frost Protection
Mode. The display will show the frost protection
snowflake symbol and the set temperature will be 5°C.
2. Switch the slider to AUTO to exit Frost Protection Mode
and revert to AUTO mode.
4.1 Setting the Time and Date
The time and date are factory set so it will not normally be
necessary to do this on site. Changes between summer and
winter time are handled automatically by the unit.
1. Switch the slider to Time/Date. The hour symbols will
flash, use +or –to adjust.
2. Press the Next button and the minute symbols will
flash, use +or –to adjust.
3. Press the Next button and the day date will flash,
use +or –to adjust the day.
4. Press the Next button and the month date will flash,
use +or –to adjust the month.
5. Press the Next button and the year date will flash,
use +or –to adjust the year.
6. Press the Next button and choose between 12hour
or 24hour clock by using the +or –buttons.
7. Press the Next or Home button, or wait for 15
seconds to automatically confirm and return to Run
mode.
4.2 Using the Copy Function
The unit is provided with a copy function which allows an
adjusted programme to be copied to another day or set
of days. This avoids the necessity of re-entering a desired
programme for another day or sets of days.
N.B. This function only works in 7 Day setting.
4. Program Settings
16 17

18 19
WARNING: Interference with sealed parts renders the
guarantee void.
In the interests of continuous product improvement we reserve
the right to alter designs, specifications and materials without
prior notice and cannot accept liability for errors.
To Operate the Copy Function
1. Switch the slider to PROG and press the Home
Button.
2. Press the Cbutton to enter the COPY mode.
3. The A button chooses the day you want to copy from and
the +/- buttons choose the day you want to copy to.
4. Press the Cbutton to confirm. The screen will show SEr
(to show the Copy function is set).
4.3 Battery Replacement
When the low battery symbol flashes in the LCD display, the
batteries need to be replaced as soon as possible. The battery
compartment is located on the front of the thermostat, under
the fascia cover. Remove the old batteries and insert new
ones. All settings including time are maintained.
N.B. If the display ever goes blank during normal operation,
the batteries need to be replaced with high quality
alkaline cells. The date, time and factory pre-set heating
times will be retained (assuming the back up battery has
not failed).
4.4 Resetting the Unit
Hold the Next button and press the reset button to restore
to factory default settings.

Version 6.10.1
We are continuously developing our products to
bring you the very latest in energy saving
technology and simplicity. However, should you
have any questions setting up your controls please
email us at [e-mail].