ESI ESCTDE Operating instructions
*Patent pending
ESCTDE
Electronic Dual Cylinder Thermostat*
User and Installaon Instrucons
INDEX
User Instrucons
What is a Cylinder Thermostat? 1
Introducon to the CTDE 2
Holiday Switch 4
Installaon Instrucons
Technical Data 5
Installaon Safety Instrucons 6
General Safety Instrucons 6
Maintenance 7
Safety Noce 7
Fing the Cylinder Thermostat 8
Adjusng and Reseng the Cylinder Thermostat 8
Wiring Example 9
User
Instrucons
What is a Cylinder Thermostat?...An explanaon for householders
heang when the temperature falls below the thermostat seng, and switching it
off once this set temperature has been reached.
Turning a cylinder thermostat to a higher seng will not make the water heat up
any faster. How quickly the water heats up depends on the design of the heang
system, for example, the size of the boiler and the heat exchanger inside the
cylinder.
The water heang will not work if a me switch or programmer has switched it off.
And the cylinder thermostat will not always switch the boiler off, because the
boiler somemes needs to heat the radiators.
Cylinder thermostats are usually fied 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 le 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.
A cylinder thermostat switches on and off the heat supply from the
boiler to the hot-water cylinder. It works by sensing the tempera-
ture of the water inside the cylinder, switching on the water
*Patent pending
1
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 to a higher temper-
ature than that of the cylinder thermostat. In most boilers, a single boiler thermo-
stat controls the temperature of water sent to both the cylinder and radiators,
although in some there are two separate boiler thermostats.
2
Introducon to the ESCTDE (Electronic Dual Cylinder Thermostat)
The ESi Controls Electronic Dual Cylinder Thermostat* is a revoluonary new
energy saving product, developed exclusively by ESi Controls. It is a direct** and
economical replacement for tradional mechanical dual cylinder thermostats.
With real safety and energy saving benefits and providing accurate temperature
control, it also features a clear and informave LCD display.
The hot water can be stored at any desired temperature between 25oC and 65oC,
with the confidence that the weekly automac one hour “boost” to above 60oC
kills any legionella bacteria, resulng in substanal 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
sensive electronic sensors operate at a far greater accuracy than convenonal oil
filled mechanical dual thermostats, and do not need physical contact unlike
tradional dual thermostats.
The large dial makes it easy to set the required controller temperature (between
25oC and 65oC). While the second (limit) safety thermostat is pre-set to 80oC with
a concealed manual reset, to comply with building regulaons.
*Patent Pending ** Refer to installaon and wiring instrucons.
3
4
Fig.1
Holiday
Switch
Holiday Switch
This is the black buon located under the display (Fig.1, page 4). Press and hold
the holiday switch for a minimum of 10 seconds unl you hear an audible click, and
this switches the ESCTDE off completely so there is no water heang and no
weekly “boost” heang. When in Holiday mode, the display is off. This feature
should only be used when the property is vacant for extended periods and there is
no requirement for water heang or for the weekly “boost”. Pressing and holding
the holiday switch again (for a minimum of 10 seconds unl you hear an audible
click) will restart the ESCTDE, the display will show the cylinder temperature and
the weekly “boost” will immediately start, and recur every 7 days at the same
me.
Installaon
Instrucons
5
Power Supply
Switch Acon
Temperature Seng Range
Automated “Boost”
Limit Thermostat
Tolerance
Switching Differenal
Dimensions
Complies with
230 VAC 50-60Hz
230 VAC 50-60Hz
230 VAC 50-60Hz
230 VAC 50-60Hz
230 VAC 50-60Hz
Switch Acon
Switching Differenal
Dimensions
Complies with
Technical Data
230 VAC 50-60Hz
25oC to 65oC
Electronic Dual Thermostat
SPDT (control), SPST (limit)
Once per week, >60oC for one hour
Power Supply
Automated “Boost”
Limit Thermostat
Tolerance
L: 108mm x H: 90mm x D: 54mm
2oC
<1oC
80oC with concealed manual reset
EMC (89/336 & 92/32 EEC) BS EN 60730-1:
2000, BS EN 60730-2-9: 2002. LVD (73/23/
EEC) (93/68/EEC) BS EN 60730-1:2000, BS
EN 60730-2-9:2002
Installaon Safety Instrucons
The unit must be installed by a suitably qualified person in accordance with the
latest IEE Wiring Regulaons.
N.B Isolate mains supply before commencing installaon. Please read all instruc-
ons before proceeding.
Ensure that the fixed wiring connecons to the mains supply is via a fuse rated at
not more than 6 amps and class ‘A’ switch having a contact separaon of a
minimum of 3mm in all poles. The recommended cable sizes are 1.0mm sqr or
1.5mm sqr. No earth connecon is required as the product is double insulated but
ensure connuity of earth throughout the system.
General Safety Instrucons
Only use this product for control of domesc hot water.
Do not restrict safety valve outlets.
Take great care to avoid scalding if you do not have a thermostac mixing valve
fied, during the weekly one hour disinfecon “boost” the hot water temperature
will be over 60oC.
6
Maintenance
Always isolate the mains supply before commencing any work, servicing or mainte-
nance on the system. And please read all instrucons before proceeding.
Arrange for an annual maintenance and inspecon schedule to be carried out by a
competent person on every part of the heang and hot water system.
Safety Noce
WARNING!
ALWAYS ISOLATE THE AC MAINS SUPPLY BEFORE INSTALLING.
THIS PRODUCT MUST BE FITTED BY A COMPETENT PERSON, AND INSTALLATION
MUST COMPLY WITH THE GUIDANCE PROVIDED IN THE CURRENT EDITIONS OF
BS767 (IEE WIRING REGULATIONS) AND PART “P” OF THE BUILDING REGULA-
TIONS.
7
8
Fing the Cylinder Thermostat
1. Slacken the three fixing screws, and insert both sensors fully into the pocket.
2. Posion the thermostat onto the pocket.
3. Tighten the three screws to secure the thermostat, take care not to over
ghten.
4. Complete the wiring connecons.
Adjusng and Reseng the Cylinder Thermostat
Adjust the dial to show the desired hot water temperature on the display,
between 25oC to 65oC. Remember, the lower the temperature, the less chance of
scalding, and the more energy saving. Most home owners find a temperature of
around 48oC - 53oC to be adequate.
If the system should overheat, the cause must be determined and resolved by a
suitably qualified person. In the event of an overheat, the thermostat cuts out
automacally. The reset for the thermostat is under the adjustment dial.
Wiring Example
9
Fing the Cylinder Thermostat
1. Slacken the three fixing screws, and insert both sensors fully into the pocket.
2. Posion the thermostat onto the pocket.
3. Tighten the three screws to secure the thermostat, take care not to over
ghten.
4. Complete the wiring connecons.
Wiring Diagram
This product requires a fused permanent Live and Neutral supply.
10
Common
1
LN
Hot Water
Safety Noce
WARNING!
ALWAYS ISOLATE THE AC MAINS SUPPLY BEFORE INSTALLING.
THIS PRODUCT MUST BE FITTED BY A COMPETENT PERSON, AND INSTALLATION
MUST COMPLY WITH THE GUIDANCE PROVIDED IN THE CURRENT EDITIONS OF
BS767 (IEE WIRING REGULATIONS) AND PART “P” OF THE BUILDING REGULA-
TIONS.
ESi Controls Limited
sales@esicontrols.co.uk
www.esicontrols.co.uk Version 2.1
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