ESP Ecocent 250T, Ecocent 250T2 Installation And Operation Manual

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ECOCENT 250 T & 250 T2

Installation and Operation

Manual

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WARNING !

READ THIS BEFORE INSTALLING THE UNIT

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 un­vented water heating systems over 15 litre capacity. This Ecocent unit must be installed and operated
in accordance with EN 806.

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.

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Contents Page

1.0

Preface

2.0

General Notes

2.1 Safety Precaution

2.2 Installation Notes

2.3 Operating Notes

2.4 Moving and Repairing notes

2.5 Operation Notes

3.0

Component Checklist

4.0

Sitting the Unit

4.1 Some notes on Ducting

4.2 Water Supply

4.3 Outlet/Terminal fittings

4.4 Limitations

4.5 Hot Water ASHP Package

4.6 Basic system schematic

5.0

Specification

5.1 Appearance

5.2 System Principles

5.3 Dimensions

5.4 Specifications

5.5 Performance

5.5.1 Performance assumptions

5.6 DHW Recovery Times

6.0

Installation

6.1 Installation Sketch Map

6.2 Indirect Thermal cut-out (dual stat)

6.3 Pipe fittings

6.4 Cold Water Supply

6.5 Cold Water Combination Valve

6.6 Drain 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

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7.1 Insulation Treatment

7.2 Wiring

7.3 Earthing

7.4 Unit System Controls

7.5 Immersion Heater

8.0

Operation

8.1 Control panel explanation

8.2 Controller Functions

8.3 Before running the unit

9.0

Maintenance Requirements for the Cylinder

9.1 Checking operation of safety valves

9.2 Cleaning the Strainer

9.5 Log Book

9.6 Maintenance Requirements

10.0 Simple Fault Finding

10.1 FAQs

11.0 Guarantee

11.1 Guarantee Terms

12.0 Environmental Information

13.0 Spare Parts

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1.0 PREFACE:

Icon

Meaning

Wrong operation may lead to risk to
life or serious injury.

Potential danger to you or others.

Prohibited.

Compulsory.

This manual includes the necessary information for the safe 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 (both
electrically and mechanically), there is water in the system and the tank has been completely purged
of air.

The installer must explain to the end user how to operate and maintain the unit before handing
over the unit to the end user.

The installer must advise the end user to read the manual fully before operating the unit and leave this
manual with the end user.

Further, improper installation, operation and/or maintenence , 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 discression of the supplier and/or
ESP without notice.

2.0 GENERAL NOTES

2.1 Safety Precautions

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.

.

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2.2 Installation Notes

Read the
Manual

Read this entire manual before attempting to install or
operate this unit.

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.

Children

Children should only operate this unit under the supervision
of adults.

Shut off the
power
supply

If there is an unusual sound or smell coming from the unit,

shut off the power supply immediately and call your

installation engineer.

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
properly earthed.

Refrigerant

If you are installing the unit in a small room, please give careful
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 suitably sized MCB.

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.

2.3 Notes on Operating your Ecocent:

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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.

Power
Supply

You must use a suitable power supply that is appropriately
Fused and protected by an RCD.

Caution

This unit has a high centre of gravity. This Ecocent must be
secured 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 a maximum 30° from the vertical axis.

2.4 Notes on moving and repairing your Ecocent:

2.5 Some Safety Notes:

2.6 General Requirements

IMPORTANT: PLEASE READ AND ENSURE THAT YOU UNDERSTAND THESE INSTRUCTIONS BEFORE
INSTALLING THE ESP ECOCENT (“DHW ASHP” OR “UNIT”). INCORRECT INSTALLATION WILL
INVALIDATE ANY GUARANTEE AND MAY BE DANGEROUS.

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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 THAT THE ECOCENT CAN BE

INSTALLED IN EITHER A VENTED OR UNVENTED SYSTEM.

3.0 COMPONENT CHECK LIST

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 all
Ecocents to be installed in a “mains pressure” configuration:

Factory fitted immersion heater (s) and thermal controls.
Cold Water Combination Valve (comprises Pressure Reducing Valve, Stainer and
Check Valve).
Expansion Core Unit (comprises Check Valve and Expansion Valve).
Temperature/Pressure Relief Valve (set at 90 - 95°C/1 Mpa (7bar).
Tundish (included in Cold Water Combination Valve pack).
Factory fitted Indirect Thermostat and Thermal Cut-out.

4.0 SITING THE UNIT

The unit must be vertically floor mounted. It can be placed anywhere convenient provided that the
discharge pipe(s) from 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 the weight of the unit when it is full of 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 controls, immersion heaters and indirect controls must be maintained for servicing
and maintenance of the unit. Please do not install valves or pipe work (except discharge pipe) within 50mm
(2”) of the T&P relief valve to allow insulation to be fitted.

Consideration must be given to the use of insulated ducting to carry air to and from the unit.
Insulated ducting must used where condensate may form on the duct work.

IMPORTANT NOTE:
APPLIANCE OR IN A ROOM FROM WHICH AN OPEN FLUED APPLIANCE TAKES

ITS COMBUSTION AIR, UNLESS THE MATTER HAS BEEN CAREFULLY
CONSIDERED AND ADEQUATE DUCTING AND VENTILLATION HAS BEEN PROVIDED FOR THE
ECOCENT AND THAT THE OPEN FLUED APPLIANCE AIR SUPPLY NEEDS HAVE BEEN

CALCULATED BY AN APPROPRIATELY QUALIFIED SPECIALIST .

Please be sure to use appropriate lifting equipment when moving the unit.

DO NOT SITE THE UNIT IN THE SAME ROOM AS AN OPEN FLUED

Some things to be considered in positioning the unit:

Waste heat is useful heat (picture 1)

The Ecocent can receive ducted waste heat from another area in the building – duct work can be fixed
to the top of the unit and may be up to 8m long. Areas over 8m away can can be used if an additional
in-line fan is fitted in the ductwork. The Ecocent can also draw heat from the room in which it is sited.

Always be sure to site the unit and arrange the duct work to allow for adequate heat availability. This

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will allow the Ecocent to operate efficiently (the inlet air should not be below 7° C or above 43° C).

The optional secondary coil in the Ecocent (25T2 model) enables 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

Picture 1

Dehumidification –
Rooms (See Picture 2). 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.

The Ecocent can be used to dehumidify rooms that are hot and damp – e.g. Laundry

Picture 2

Cooling in the re-circulating air mode
The Ecocent can extract warm air and place cooled, dehumidified, outlet air back into the same room –
this is perfect for cellars and gymnasiums. Any cold air exhaust air ducting must be lagged when
passing through a warmer area to prevent the formation of condensate. All ducting should be 150mm or split
into two 75-80mm ducts.

(picture 3)

Picture 3

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Directional cooling ducting (picture 4) can be fitted with air diverters (e.g. the ESP “Ecobox”) so that
the cool exhaust air can be directed to chosen areas.

Picture 4

Siting the Ecocent – some points:

1. Decide upon the right route to be taken to move the unit to the chosen position.

2. Where possible, move the Ecocent to its final location in its original case to avoid damage.

3. The unit and electrical connections must be installed by suitably qualified and experienced
technicians.

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.

5. The surface on which the Ecocent is placed must be capable of supporting the weight of the
filled unit and must be flat (≤2° from horizontal.)

4.1 Some Notes on Ducting.

Air ducts to and from the heat pump should be 150mm pipe or split into two 75-80mm pipes.

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. It is always best to use insulated ducting so that condensation is
avoided.

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.

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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 1.6 MPa (16 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 (see above), 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:

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