ESI ESCTDEB User manual

ESCTDEB
Electronic Dual
Cylinder 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.
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User Instructions
What is a Cylinder Thermostat?
An explanation for householders 4
Introduction to the ESCTDEB 5
Holiday Switch 6
Contents

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An explanation for householders
A cylinder thermostat switches on and off the heat supply
from the boiler to the hot-water cylinder. It works by sensing
the temperature of the water inside the cylinder, switching
on the water heating when the temperature falls below
the thermostat setting, and switching it off once this set
temperature has been reached.
Turning a cylinder thermostat to a higher setting will not
make the water heat up any faster. How quickly the water
heats up depends on the design of the heating system, for
example, the size of the boiler and the heat exchanger inside
the cylinder.
The water heating will not work if a time switch or
programmer has switched it off. And the cylinder thermostat
will not always switch the boiler off, because the boiler
sometimes needs to heat the radiators.
Cylinder thermostats are usually fitted between one quarter
and one third of the way up the cylinder. The cylinder
thermostat will have a temperature scale marked on it, and
it can be adjusted to the chosen temperature, then left
to do its job. The thermostat must be designed to kill off
harmful bacteria in the water. Raising the temperature of the
stored hot water unnecessarily results in wasted energy and
increases the risk of scalding.
Dual cylinder thermostats combine both the controller and
the limit thermostats into one common unit.
If you have a boiler control thermostat, it should always be set
What is a Cylinder Thermostat?

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to a higher temperature than that of the cylinder thermostat.
In most boilers, a single boiler thermostat controls the
temperature of water sent to both the cylinder and radiators,
although in some there are two separate boiler thermostats.
Introduction to the ESCTDEB (Electronic Dual
Cylinder Thermostat)
The ESi Controls Electronic Dual Cylinder Thermostat* is
a revolutionary new energy saving product, developed
exclusively by ESi Controls. It is a direct** and economical
replacement for traditional mechanical dual cylinder
thermostats. With real safety and energy saving benefits and
providing accurate temperature control, it also features a clear
and informative LCD display.
The hot water can be stored at any desired temperature
between 25°C and 65°C, with the confidence that the weekly
automatic one hour “boost” to above 60°C kills any legionella
bacteria, resulting in substantial energy saving.
The LCD display shows the current water temperature and the
user defined water temperature, while the red LED indicates
that the unit is calling for heat. The sensitive electronic sensors
operate at a far greater accuracy than conventional oil filled
mechanical dual thermostats, and do not need physical
contact unlike traditional dual thermostats.
The large dial makes it easy to set the required controller
temperature (between 25°C and 65°C). While the second
(limit) safety thermostat is pre-set to 80°C with a concealed
manual reset, to comply with building regulations.
*Patent Pending ** Refer to installation and wiring instructions.

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Holiday Switch
This is the black button located under the display (See Fig.1).
Press and hold the holiday switch for a minimum of 10
seconds until you hear an audible click, and this switches the
ESCTDEB off completely so there is no water heating and
no weekly “boost” heating. This feature should only be used
when the property is vacant for extended periods and there
is no requirement for water heating or for the weekly “boost”.
Pressing and holding the holiday switch again (for a minimum
of 10 seconds until you hear an audible click) will restart the
ESCTDEB, the display will show the cylinder temperature and
the weekly “boost” will immediately start and recur every 1-7
days depending on the user set position (see page 9) at the
same time.
Holiday Switch
Fig. 1

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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] or for technical queries call
us on our dedicated technical helpline 07539 117468.
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.

Version 6.10.2
© ESi Controls Limited 2017