All un-vented water heating systems above 15 litres (this includes the ESP Ecocent Hot water ASHPs)
MUST be installed to meet the requirements of the local area Building Regulations. It is a legal
requirement that the local Building Control Officer be notified of any proposed installation of un-vented
water heating systems over15 litre capacity.
Furthermore, it must be fitted by an installer who has successfully completed a recognised course in the
installation of un-vented heating systems such as CITB and be familiar with installing the Ecocent unit.
Failure to properly fit the unit may affect its safety, efficiency and invalidate any guarantee.
Safety requirements in the UK call for an expansion space (internal or external),safety devices to prevent
the stored water exceeding 100°C, and pipe work to convey discharged hot water safely away from the
safety devices.
THE UNIT MUST BE INSTALLED, COMMISSIONED AND MAINTAINED BY A COMPETENT INSTALLER IN
ACCORDANCE WITH BUILDING REGULATION G3 (ENGLAND AND WALES), TECHNICAL STANDARD P3
(SCOTLAND) OR BUILDING REGULATION P5 (NORTHERN IRELAND) AND THE WATER FITTING
REGULATIONS (ENGLAND AND WALES) OR WATER BYELAWS (SCOTLAND). FOLLOWING INSTALLATION
AND COMMISSIONING,
THE
OPERATION OF THE UNIT SHOULD BE
EXPLAINED TO THE USER AND THESE
INSTRUCTIONS LEFT WITH THEM FOR FUTURE REFERENCE.
Contents
1.0 Preface
2.0 General Notes
2.1 Safety Precaution Notes
2.2 Installation Notes
2.3 Operating Notes
2.4 Notes on Moving and Repairing the Unit
2.5 Operation Notes
2.6 General Requirements
3.0 Component Checklist
4.0 Positioning the Unit
4.1 Some notes on Ducting
4.2 Water Supply
4.3 Outlet/Terminal fittings (Taps etc.)
4.4 Limitations
4.5 Hot Water ASHP Package
4.6 Basic system schematic
5.0 Specification
5.1 Appearance
5.2 Dimensions
5.3 Performance
5.3.1 Performance assumptions
5.4 DHW Recovery Times
6.0 Installation
6.1 Installation Diagram
6.2 Indirect Thermal cut-out (dual stat) and 2-Port Motorised Valve
6.3 Pipe fittings
6.4 Cold Water Supply
6.5 Cold Water Combination Valve
6.6 Drain-Off Cock
6.7 Outlet Pipe Work
6.8 Secondary Circulation of DHW
6.9 TPRV
6.10 Warnings
6.11 Discharge Pipe Work
6.12 Expansion Vessel
6.13 G3 Requirement
6.14 G3 Guidance Section
7.0 How to connect to the Heat Pump
7.1 Vacuum and filling refrigerants
7.2 Controller System Test
7.3 Preparing for refrigerants
7.4 Insulation Treatment
7.5 Wiring
7.6 Earthing
7.7 Unit System Controls
7.8 Immersion Heater
8.0 Operation
8.1 Control panel explanation
8.2 Display Explanation
8.3 Using the Control Panel
8.3.1 Before running the unit
8.3.2 Mode Selection
8.3.3 Setting the Clock
8.3.4 Setting the timers
8.3.5 Vacation Mode
8.3.6 Electric Heating Mode
8.3.7 Fan Mode Settings
8.3.8 Locking the keyboard
8.3.9 Parameters
9.0 Maintenance Requirements
9.1 Checking the operation of safety valves
9.2 Cleaning the Strainer
9.3 Draining the Unit
9.4 Descaling the immersion heater
9.5 Refilling the system
9.6 Log Book
9.7 Maintenance Requirements
10.0 Faults
10.1 Simple Fault Finding
11.0 Warranty
11.1 Guarantee Terms
12.0 Environmental Information
13.0 Spare Parts
13.1 Exploded View
Appendix 1. PCB Layouts.
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ESP400-10-200L and 300L
Professional
& qualified
installer
is required
The heat pump must only be installed by a suitably qualified
engineer. Failure to ensure this can cause damage to the
unit and may cause serious injury. The warranty on the unit
will also be invalidated if a suitably qualified engineer is not
engaged to install it.
Earthing
required
Please make sure that the unit and power supply are
soundly earthed.
Refrigerant
If you are installing the unit in a small room, please give full
consideration to adequate ventilation being available in the
event of a refrigerant leak.
Installation
Site
Do not install the unit near to a gas installation. This unit is
designed to be installed inside a building.
Site
consideration
Ensure that this unit is installed on a solid level floor. Make
sure that you have a suitable facility to cater for disposal of
condensate from the condensate drain on the unit.
Circuit
Breaker
Make sure that this unit is connected to the power supply via
a fused switched spur and suitably sized MCB for the
domestic ring main.
Unit Upright
The unit must be installed level across the whole diameter.
Failure to install the unit level will mean that condensate can
spill over the lip of the cylinder.
1.0 Preface:
This manual includes the necessary information about installation and maintenance of the Ecocent. Please read
this manual carefully before you install or carry out maintenance on the unit.
When installing the unit, please carry out the work strictly in accordance with the manual, relevant Regulations
and good practice.
Please do not switch the unit on until you are sure that it has been properly installed, electrically, mechanically,
hydraulically and that there is water in the system.
The installer should explain to the end user how to operate and maintain the unit before handing over the unit to
the end user. Also, the installer should advise the end user to read the manual fully before operating the unit and
leave this manual with end user.
Further, improper installation, operation and/or maintenance, and failure to maintain the unit as per this manual
will invalidate any unit warranty or guarantee.
The manual may be altered and/or updated in any way at the sole discretion of the supplier and/or ESP without
notice.
2.0 General Notes:
2.1 Safety Precaution notes
Below you will find information that is critical for the safe and proper installation and the use of the unit. Please
make sure that you understand the contents to help avoid the risk of injury or damage to the unit/other property.
2.2 Installation Notes:
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ESP400-10-200L and 300L
Caution
This unit has a high centre of gravity. This unit must be
strapped to prevent it falling over when in transit.
Suitably
qualified
engineer
When moving the unit or carrying out repair work please be
sure to use only a suitably qualified engineer.
Do NOT
Do NOT try to install, move or repair the unit yourself – it is
NOT worthwhile running the risk of injury.
Transporting
the Unit
The unit must be transported in the vertical position. It can
be tilted up to 60° from the horizontal axis.
Do NOT
Do not push anything into the fan blades when running and
make sure that children cannot access the unit or play close
to the unit.
Shut off the
power
supply
If there is an unusual sound or smell coming from the unit,
immediately shut off the power supply and call your
installation engineer.
Siting the
Unit
The unit must only be installed indoors – the unit is neither
designed for, nor suitable for, installation outside. The Unit
needs to be sited where the ambient temperature never
goes below 5 degrees. If the unit is to be left unused for any
significant period of time during which the ambient
temperature could cause the unit or pipe work from the unit
to freeze, it should be drained down.
Shut off the
power
When cleaning the unit, shut off the power supply.
You MUST
You must use a suitable power supply that is appropriately
fused.
2.3 Operating Notes:
2.4 Notes on Moving and Repairing the Unit:
2.5 Operation Notes:
2.6 General Requirements:
IMPORTANT: PLEASE READ AND UNDERSTAND THESE INSTRUCTIONS BEFORE INSTALLING
THE ESP Ecocent (“DHW ASHP” or “unit”). INCORRECT INSTALLATION WILL INVALIDATE ANY
GUARANTEE.
PLEASE NOTE THAT THERE ARE ESSENTIALLY 2 UNITS COMBINED INTO ONE IN THE ESP
ECOCENT AND YOU MUST BE SURE TO UNDERSTAND BOTH ELEMENTS - THE INDIRECT HOT
WATER CYLINDER AND THE AIR SOURCE HEAT PUMP. PLEASE ALSO NOTE THE ECOCENT
CAN BE INSTALLED IN EITHER A VENTED OR UNVENTED SYSTEM.
3.0 Component Checklist:
Before commencing installation of the unit, check that all the components for your unit are contained in the
package. The following components are supplied as standard with any unit being installed in a
“mains pressure” configuration:
• Factory fitted immersion heater (s) and thermal controls.
• Cold Water Combination Valve (comprises Pressure Reducing Valve, Strainer, and Check Valve).
• Expansion Core Unit (comprises Check Valve and Expansion Valve).
• Tundish (included in Cold Water Combination Valve pack).
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ESP400-10-200L and 300L
• Factory fitted Indirect Thermostat and Thermal Cut-out.
4.0 Positioning The Unit:
The unit must be vertically floor mounted. It can be placed anywhere convenient provided that the discharge
pipe(s) from its safety valves and air handling duct work can be correctly installed. Areas that are subject to
freezing must be avoided. Ensure that the floor is of sufficient strength to support the weight of the unit
when full with water. Pipe run lengths should be kept as short as possible for maximum economy and
efficiency: the use of secondary returns should be avoided. Access to associated controls, immersion heaters and
indirect controls must be possible for servicing and maintenance of the unit. Please do not install valves or pipe
work (except a discharge pipe) within 50mm (2”) of the T&P relief valve to allow insulation to be fitted. The
insulation is important to avoid heat loss.
Consideration must be given to the use of insulated ducting to carry air to and from the unit. Insulated ducting
must be used where condensate may form on the duct work.
IMPORTANT NOTE: DO NOT SITE THE UNIT IN THE SAME ROOM AS AN OPEN FLUED
APPLIANCE OR A ROOM WHERE AN OPEN FLUED APPLIANCE TAKES ITS COMBUSTION AIR
FROM, UNLESS THE MATTER HAS BEEN CAREFULLY CONSIDERED AND ADEQUATE
DUCTING AND VENTILATION HAS BEEN PROVIDED FOR THE UNIT (THE DHW ASHP) AND THAT
THE OPEN FLUED APPLIANCE IS FULLY CATERED FOR IN TERMS OF A SUITABLE AIR SUPPLY.
Please be sure to use appropriate lifting equipment when moving the unit.
Some things to be considered when positioning the unit:
Waste heat is useful heat.
The Ecocent works by harvesting ‘waste’ heat from areas where there is a build up of unwanted heat.
Traditionally, moist, warm air is expelled from building by mechanical means or by opening windows. The
Ecocent uses this waste heat to heat hot water. Air can be ducted from areas such as Bathrooms, Kitchen and, in
a commercial environment, Server Rooms to the Ecocent via 150mm insulated ducting. In a domestic
environment, this could include areas of high solar gain. The resultant cold, dry air is ejected from the building
via more insulated 150mm ducting. Alternatively, the Ecocent can be installed in areas where there is a build
up of heat negating the need for input ducting and the cold air can then be vented outside the building via
ducting.
Always be sure to site the unit and arrange the duct work to maximise the use of available waste heat. This will
allow the Ecocent to operate at maximum efficiently.
The secondary coils in the Ecocent enable direct connection to a second stable heat source, e.g. a solar heating
system or a boiler. Under no circumstances is the Ecocent to be installed onto an uncontrolled heat source e.g.
wood burner or back boiler.
Dehumidification – The Ecocent can be used to dehumidify rooms that are hot and damp – e.g. Laundry rooms
etc. The unit is equipped with a condensate drain that must be properly directed to a suitable waste pipe where
the condensate water (non acidic) can drain away. If the drain is into a main sewer it must have a trap installed
to prevent back smell through the Ecocent.
Directional Cooling – ducting can be fitted with air diverters (e.g the ESP “Ecobox”) so that cool exhaust air
from the Ecocent can be directed to chosen areas such as server rooms for commercial applications.
Positioning the Ecocent – some further points:
1. Decide upon the right route to be taken to move the unit in to the chosen position.
2. Try to move the unit in its original case to avoid damage.
3. Be sure to have the unit and electrics fitted by qualified electrician.
4. Ensure that no building materials or debris are allowed to enter the air ducts at the top of the unit or
any extension of the ducts.
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ESP400-10-200L and 300L
4.1 Some Notes on Ducting:
The maximum length of the ducting (input plus exhaust) that can be attached to the Ecocent is 16m. All ducting
should be 150mm or split into two ducts of not less than 108mm diameter.
The outlets should be fitted with a suitable gravity vent to prevent rain, debris, animals and plants entering the
ducts.
You can use rigid or flexible ducting. Insulated ducting must be used so that condensation is avoided. It also
has the added benefit of reducing any airflow noise.
When servicing the unit, ducting should be checked to make sure that it is clear and all obstructions must be
removed.
4.2 Water Supply:
Because water composition can vary greatly, it is not ESP’s policy to issue recommendations relating to water
treatment. The user or the owner is responsible for contacting a specialized water treatment company to obtain
water treatment advice appropriate to your location. Appropriate water treatment processes/devices must be
fitted to ensure the longevity of the unit and its proper operation.
Bear in mind that the mains water supply to the property will be supplying both the hot and cold water
requirements simultaneously. Therefore, it is important that the maximum water demand be assessed
and the water supply checked to ensure that it can meet peak demand.
NOTE: A high mains water pressure will not always guarantee high flow rates. The main supply pipe to the unit
must be 22mm. The minimum mains water supply requirements should be 0.15 MPa (1.5 bar) working pressure
and 20 litres per minute flow rate at the Ecocent. At these levels, outlet flow rates may be poor if several outlets
are used simultaneously – the higher the available pressure and flow-rate the better the system performance will
be.
The unit has a design operating pressure of 3 bar which is controlled by the Cold Water Combination
Valve on the cold water feed pipework. The Cold Water Combination Valve can be connected to a maximum
mains supply pressure of 1.5 MPa (15 bar). The water supply must be of wholesome water quality (Fluid
Category 1 as defined by the Water Supply Regulations 1999).
The unit MUST be level, otherwise this could cause problems with condensate draining from the heat pump
section of the unit in to the condensate drain.
An inline strainer (if open vented) and scale inhibitor (WRAS approved) must be fitted “in line” on the water
supply to the unit. Failure to fit these will invalidate the unit warranty/guarantee. All fittings must be
WRAS approved.
If installing the unit in unvented configuration, an “unvented Pack”, containing the required safety valves must
be supplied with the unit and there is likely to be an additional cost for this.
4.3 Outlet/Terminal Fittings (Taps etc.):
The unit can be used in conjunction with most types of terminal fittings. It is helpful in many mixer showers to
have balanced hot and cold water supplies; in these instances the balanced cold water supply can be taken
from the tapping on the combination valve . Branches to cold drinking water outlets should be taken before the
combination valve.
NOTE: Accessories should have a rated operating pressure of at least 0.8 MPa (8 bar).
4.4 Limitations:
The unit should not be used in any of the following instances:
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ESP400-10-200L and 300L
With a water supply from solid fuel boilers or any other boiler in which the energy input is not under
effective thermostatic control, unless additional, necessary and appropriate safety measures are
installed.
With gravity circulation primaries unless a good head of pressure is available.
With steam heating plant unless additional and appropriate safety devices are installed.
With ascending spray type bidets or any other facility where there is a Class 5 back siphoning risk
requiring that an appropriate air gap be employed.
With water supplies that have either inadequate pressure or where the supply may be intermittent.
In situations where it is not possible to pipe away any discharge from the safety valves safely.
In areas where the water contains a high proportion of solids, e.g. suspended matter that could block
the strainer, unless adequate filtration can be ensured.
Where another appliance in the room is vented by way of an open flu.
The installation must be carried out in accordance with the relevant requirements of:
A) The appropriate Building Regulations: either The Building Regulation (England and Wales), The
Building Regulations (Scotland) or Building Regulations (Northern Ireland).
B) The Water Fittings Regulations (England and Wales) or Water Bye laws (Scotland).
C) Any other applicable Regulations.
Failure to observe any of the above conditions will invalidate the warranty/guarantee.
4.5 Hot Water Air Source Heat Pump Package:
Where the unit is to be installed as an unvented system it will be supplied with the fittings needed to allow
installation to comply with G3 Regulations – This means that the supply cost for the unvented
configuration unit will be higher than when installed as a vented system as additional fittings are required.
Where the unit is to be installed in a vented system, such fittings will not be necessary.
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ESP400-10-200L and 300L
4.6 Basic System Schematic:
The following is a basic layout of an Ecocent system:
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ESP400-10-200L and 300L
Controller
Water
Storage
Tank
Air Outlet
Air Inlet
5.0 Specifications:
5.1 Appearance:
Good Looking and Efficient
The attractive design allows the unit to be placed in the open in finished utility spaces and basements; depending
on ambient conditions, the cost of operation can be up to 75% less of that of an electric water heater, and can be
used in locations unsuitable for solar hot water heating.
Environmentally friendly and safer
The unit produces no harmful emissions locally; there is no combustion of oil, coal, or natural gas. No carbon
monoxide is produced and there is no open flame.
Easy to operate and multiple heat sources
The Ecocent is equipped with a timer for automatic start-up and stop and an adjustment for the easy setting of
water temperature. The unit can take heat from a number of sources in domestic installations, or from hot areas
in light industrial environments.
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ESP400-10-200L and 300L
Dimension
(mm)
A
1705
B
1050
C
665 D 305 E Ø 560
5.2 Dimensions:
200L Ecocent
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