ESP Ecocent 100L Installation And Operation Manual

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ESP ECOCENT 100L

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 E c o c e n t
Hot Water ASHP’s) 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 over 15
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.

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Contents Page 1.0 Preface

2.0 General Notes

2.1 Safety Precautions

2.2 Installation Notes

2.3 Operating Notes

2.4 Moving and Repair Notes

2.5 Siting and Safety Notes

2.6 General Requirements

3.0 Siting the Unit

3.1 Heat Source

3.2 Dehumidification

3.3 Cooling

3.4 Siting Guidance

4.0 Installation

4.1 Ducting

4.2 Water Supply

4.3 Outlet Fittings

4.4 Limitations

4.5 Regulations

4.6 Package Contents

5.0 Specifications

5.1 Appearance

5.2 Features

6.0 Technical Specifications

7.0 Performance

7.1 Technical Performance

7.2 Standing Heat Losses

7.3 DHW Recovery Times

7.4 Performance Graphs

8.0 Functions

9.0 Physical Installation

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9.1 Schematic Diagram

9.2 Pipe Fittings

9.3 Cold Water Supply

9.4 G3 Requirements

9.5 G3 Guidance

10.0 Moving the unit

10.1 Storage and Transport

10.2 Using a Forklift

10.3 Transporting for Installation

11.0 Hydraulic Connection

11.1 Connection Diagram

12.0 Wiring

12.1 Wiring Diagram

12.2 Earthing

13.0 Operating the Unit

14.0 Troubleshooting

15.0 Maintenance

15.1 The Cylinder

15.2 Safety Valves

15.3 The Strainer

15.4 Draining The Unit

15.5 Descaling the Immersion

15.6 Refilling the Unit

15.7 Log Book

15.8 Maintenance Requirements.

16.0 Fault Finding

17.0 Guarantee

17.1 Guarantee Terms

18.0 Environmental Information

19.0 Spare Parts

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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 and mechanically and 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.

 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 Precautions

Below you will find information that is critical for the safe and proper
installation and use of the unit. Please make sure that you understand the
contents because it is written to help avoid the risk of injury or damage to the
unit/other property.

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2.2 Installation Notes

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 full
consideration to adequate ventilation being available in the event
of a refrigerant leak.

Installation
Site

Do not install the unit near a gas installation. This unit is
designed to be installed inside a building.

Site
consideration

Ensure that this unit is fixed securely to a suitable wall that is
capable of taking the load of the unit when full of water. Make
sure that you have a suitable facility to cater for the 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 a 13A Type C 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.

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, shut
off the power supply immediately and call your installation
engineer.

Caution

This unit has a high centre of gravity. This unit must be strapped
down 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.

2.3 Operating Notes

2.4 Moving and Repair Notes

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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 (see section 11.3).

Siting the
Unit

The unit must only be installed indoors – the unit is not
designed for, or 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.

2.5 Siting and 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.

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

IMPORTANT NOTE: DO NOT SITE THE UNIT IN THE SAME ROOM AS AN
APPLIANCE WITH AN OPEN FLUE OR IN A ROOM FROM WHICH AN
OPEN FLUED APPLIANCE TAKES ITS COMBUSTION AIR, UNLESS THE

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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 SUITABLE AIR SUPPLY.

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

3.0 SITING THE UNIT

The unit is designed to be wall mounted. It can be placed anywhere
convenient provided 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 wall 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 and indirect controls must be possible 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. 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.

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3.1 Heat Source

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 without an additional in-line fan in the ductwork being needed.
The Ecocent can also draw heat from the room in which it is sited. (See
Picture 1)

Always be sure to site the unit and arrange duct work to allow adequate
heat availability to allow the Ecocent to operate efficiently (inlet air should
not be below 8° C.)

The secondary coil in the Ecocent 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

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Picture 1

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

Picture 2

3.3 Cooling (picture 3)
The Ecocent can extract warm air and place cooled, dehumidified, outlet air
back in to the same room – this is perfect for cellars and gymnasiums. Any
cold air exhaust air ducting must be lagged when passing through a warmer

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area to prevent the formation of condensate. All ducting should be 150mm
or split into two 75-80mm ducts.

Picture 3

3.4 Siting Guidance

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.

4.0 INSTALLATION

4.1 Ducting

Air ducts to and from the heat pump should be 150mm pipe.

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.

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When servicing the unit, ducting should be checked to make sure that it is
clear and obstructions removed.

4.2 Water Supply

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 in 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 unit. 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 horizontally, and vertically upright, otherwise this
could cause problems with condensate draining from the heat pump section
of the unit into 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.

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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 Fittings

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 a 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.

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• 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
Regulations (England and Wales), The Building Regulations (Scotland) or
Building Regulations (Northern Ireland).

B) The Water Fittings Regulations (England and Wales) or Water By-laws
(Scotland).

C) Any other applicable Regulations.

Failure to observe any of the above conditions will invalidate the
warranty/guarantee.

4.5 Package Contents

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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5.0 SPECIFICATIONS

Air Inlet

Air Outlet

5.1 Appearance

5.2 Features

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 setting of water temperature easily. 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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6.0 TECHNICAL SPECIFICATIONS

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Model

ESP400-003-10 0L(D)

Heating ca pa city

kW

1.0

Wa ter tank capa city

L

100L

Power input

kW

0.27

Ru nning curren t

A

1.2

Power supp ly

230V~/50H z

Compressor num be r

1

Compressor Type

Rotary

Rated out let water temp.

°C

55

No ise

dB(A)

45

Water in let /o utlet size

inch

1/2

Net d imensio ns

mm

see the d ia gr am

Shipping dimen si ons

mm

see package label

Net weight

kg

see nameplate

Shipping w eight

kg

see package label

7.0 PERFORMANCE

7.1 Technical Performance

Standard working conditions:
Ambient temperature of dry bulb/wet bulb: 15° C /13° C
Rated water outlet temperature: 45° C.
Working scope: Peak water outlet temperature: 60° C
Running Current is quoted without Immersion Heater.
Immersion heater is rated at 1kW

Operating parameters:
Acceptable scope of water setting temperature: 9° C ~70° C
Acceptable running pressure of the water tank: 0.1~1.0MPa
Maximum inlet water pressure: 0.7MPa

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Volume

Time

10l

32 mins

15l

47 mins

20l

63 mins

30l

95 mins

40l

126 mins

65l

205mins

7.2 Standing Heat Losses

The amount of heat that the Ecocent loses through convection to the
surrounding area (standing heat loss) is dependent on a number of things
including, for example, the target temperature and the ambient air
temperature surrounding the unit. The target temperature is an end user
choice and the ambient temperature will depend on location; clearly if the
unit is in an ‘airing cupboard’, the ambient temperature will be higher than
if it is located in, say, a utility room; the higher the ambient air
temperature, the lower the rate of heat loss. However, an illustrative heat
loss for the Ecocent is 1.09 kWh per 24hrs in an ‘average’ location of 20°C
and a target temperature of 55°C.

7.3 DHW Recovery times

The recovery time of your 100ltr Ecocent (the time it takes to return to fully
hot) depends on the storage temperature (normally 55°C), the temperature
of your cold water supply (normally taken to be 10°C), the temperature of
the air supply (at least 15°C) and the amount of water you use. Typically, a
single person uses about 45l of hot water per day. However, it would be
unusual to use all this hot water at the same time. A shower uses around 30l
and a bath uses around 65l. The recovery times based on proscribed test
data are as follows:

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But, because the Ecocent unit uses waste heat, the expected recovery times

Volume

Time

10l

24 mins

15l

36 mins

20l

48 mins

30l

72 mins

40l

97 mins

65l

157mins

are likely to be much shorter and the following table is indicative of more
normal recovery times:

In fact, the recovery times could well be even better than this because the air
source will probably warmer than used to calculate the above tables.

Your Ecocent unit will have been sized based upon normal DHW use profiles
and volumes and, save in exceptional circumstances (e.g. visitors using
shower/bath), you should not run out of hot water. Should your usage
exceed normal expectation, the immersion heater can be used to provide a
boost by selecting the rapid heating mode. In fact, in the unusual event that
the target temperature (normally 55°C) is not reached within 45 mins, the
immersion heater will automatically provide that boost.

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7.4 Performance Graphs

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8.0 FUNCTIONS

Heating Capacity

The unit absorbs energy from the air taken in through the inlet ductwork. If
the air inlet temperature is low, heating capacity will show a variation from
standard conditions.

3 Minutes Protection

When the unit stops, if you try to immediately restart the unit or turn on the
manual switch, the unit will not run for 3 minutes. This is built in protection
for the compressor.

Heating Mode Operating

If the ambient temperature is very high, to protect the unit, the fan motor
will stop running.

Defrosting

When in heating mode, the unit will defrost automatically, if required . The
fan motor will stop running when the unit is defrosting.

Working Conditions

The unit should be run in ambient temperatures of 0-40 deg. The unit
includes sophisticated electronic devices - do not fill the Ecocent with water
from a lake, river water or groundwater and be sure to put an inline strainer
(open vented) and scale inhibitor in the cold water feed - failure to do so
will invalidate the warranty/guarantee.

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9.0 PHYSICAL INSTALLATION

9.1 Schematic Diagram

9.2 Pipe Fittings

Air ducts must be at least 150mm in internal diameter. It is recommended
that you use insulated ducting on both inlet and outlet ducts.

9.3 Cold 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 specialised 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.

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A 22mm cold water supply is recommended, however, if a 15mm (1/2”)
supply exists which provides sufficient flow it may be used. More flow noise
may be experienced from small bore pipes due to the increased water
velocity through them.

The Cold Water should be fitted with a full flow isolation valve which will
enable the unit to be isolated from the mains supply for maintenance or
servicing.

An inline filter (open vented) and an effective scale prevention device should
be fitted.

9.4 G3 Requirement

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).

There shall be precautions to ensure that the hot water discharged from
safety devices is safely conveyed to where it is visible but will not cause
danger to persons in or about the building.

9.5 G3 Guidance

The installation should include the discharge pipe(s) (D1) from the safety
device(s). In either case the tundish should be vertical, located in the same
space as the unvented hot water storage system and be fitted as close as
possible and within 500mm of the safety device(s) e.g. the TPRV.
The discharge pipe (D2) from the tundish should terminate in a safe place
where there is no risk to persons in the vicinity of the discharge, and be of
metal

a) be at least one pipe size larger than the nominal outlet size of the
safety de- vice unless its total equivalent hydraulic resistance exceeds
that of a straight pipe 9m long i.e. discharge pipes between 9m and
18m equivalent resistance length should be at least two sizes larger

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than the nominal outlet size of the safety device, between 18 and
27m at least 3 sizes larger, and so on. Bends must be taken into
account in calculating the flow resistance. Refer to Diagram 7 and
Table 1 below. An alternative approach for sizing discharge pipes
would be to follow BS6700:1987 Specification for design,
installation, testing and maintenance of services supplying water for
domestic use within buildings and their curtilages, Appendix E,
section E2 and table 21.

b) have a vertical section of pipe at least 300mm long below the
tundish before any elbows or bends in the pipe work.

c) be installed with a continuous fall, and in a frost free environment.

d) have discharges visible at both the tundish and the final point of
discharge, but where this is not possible or is practically difficult
there should be clear visibility at one or other of these locations.

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Examples of acceptable discharge arrangements are:

i. ideally below a fixed grating and above the water seal in a trapped
gully.

ii. downward discharges at low level; i.e. up to 100mm above
external surfaces such as car parks, hard standings, grassed areas etc.
are acceptable providing that where children may play or otherwise
come into contact with discharges a wire cage or similar guard is
positioned to prevent contact, whilst maintaining visibility.

iii. discharges at high level; e.g. into a metal hopper and metal down
pipe with the end of the discharge pipe clearly visible (tundish
visible or not) or onto a roof capable of withstanding high
temperature discharges of water and 3m from any plastic guttering
system that would collect such discharges (tundish visible).

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iv. where a single pipe serves a number of discharges, such as in
blocks of flats, the number served should be limited to not more than
6 systems so that any installation discharging can be traced
reasonably easily. The single common discharge pipe should be at
least one pipe size larger than the largest individual discharge pipe
(D2) to be connected. If unvented hot water storage systems are
installed where discharges from safety devices may not be apparent
i.e. in dwellings occupied by blind, infirm or disabled people,
consideration should be given to the installation of an electronically
operated device to warn when discharge takes place.

10.0 MOVING THE UNIT

10.1 Storage and Transportation

Generally, it's better to use a container to transport hot water heat pumps
and store them in a suitable and dry place.

10.3 Using a Forklift

When using forklift to carry the unit it must be on a pallet and the operator
should try to keep the height of forklift at the lowest possible level because
unit is top-heavy.

10.3 Transportation for Installation

The unit must be kept at vertical for at least 1 hour before you attempt to
start it.

DO NOT TURN UPSIDE DOWN

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11.0 Hydraulic Connection

Handle

Drainage Pipe

Please bear the following points in mind when connecting the water pipes:

 The inner surface of all pipes should be clean, with no oxidization or

dirt to restrict flow. After connecting pipes, please check the whole
system for leaks before applying insulation.

 Install one-way valves and safety valves in the distribution system.

 All pipework must be installed in accordance with DIN1988. To avoid

too high a water pressure, please install a discharge valve.

 Ensure that debris does not enter the distribution pipework during

installation.

The drain valve should be operated periodically (using the handle) to
ensure that it does not jam and is free of sediment. Care should be
taken as the discharge water will be hot. The drainage pipe should be
well insulated and checked periodically to minimise the risk of blockage.
Blockage could lead to a system failure.

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11.1 Installation Diagram

Accessories provided: safety release valve.

ATTENTION !

After installing the pipework in accordance with the above diagram, open the closest
hot water tap and stop valve to fill the vessel. This will purge the system of air and the
process can take up to 20mins. When no more air escapes from the hot water tap, the
tap can be turned-off and the system should have been fully purged.

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12.0 WIRING

Diagram 14

12.1 Wiring Diagram

All electrical wiring MUST be carried out by a qualified electrician and
conform to the latest I.E.E. Wiring Regulations. The wiring block diagram is
set out below in diagram 14.

Great care should be taken to ensure that the unit is properly wired to the
mains electricity and any auxiliary components. The mains wire connection
will be found towards the top of the unit. The power supply MUST be a fused
switched spur.

12.2 Earthing

The unit MUST be earthed and a facility is provided for this in the design. The
unit MUST be installed by qualified engineers and electricians. ESP will not
accept responsibility for units that are not fitted by appropriately qualified

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installers. Failure to have the unit fitted by a suitably qualified installer will
invalidate the warranty/guarantee of the unit.

13.0 OPERATING THE UNIT

Control Panel

Power On
When the unit is powered on, the unit will either be in stand-by or running
depending upon the state when it was turned-off. When the unit is in stand­by mode, the red light is off.

Viewing Modes
Repeatedly pressing the Mode Button will allow you to toggle between
different energy modes.

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Red and yellow
lights Illuminated

Green and Red
lights Illuminated

Two Red lights
illuminated

The three different modes operate as following:

1 Standard mode: When the ‘running’ and the ‘hybrid’ lights are
illuminated, the unit is in the standard mode. This is the recommended mode
and should be suitable year-round.

2 Energy saving mode: When the ‘running’ and the ‘economic’ lights are
illuminated, the unit is in energy saving mode. In this mode, water is being
heated by the heat pump alone. This setting is suitable when the ambient air
temperature is above 10°C.

3 Rapid heating mode: When the ‘running’ and the ‘H Demand’ lights are
illuminated, the unit is in high demand mode. In this mode, both the heat
pump and the 1kW immersion heater are used. This mode is suitable for
urgent hot water needs only.

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Green Light

Illuminated

Green and Red lights
illuminated

Modes can be selected according to the actual demand but it is strongly
suggested that standard mode is used the majority of the time.

Power on/Power off

is the power switch. When the unit is operating, the indicator light is

illuminated.

Parameter setting
Power on and press " " to rise the set point (the target water
temperature), press the " " to decrease the set point. The factory setting
for the water temperature is 55°C and you are advised not to change it.

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Set point automatic regulation

The default setting is automatic mode during which the unit will change the
set point to follow the ambient air temperature automatically to account for
seasonal variations. Decreasing the set point can save energy in summer and
the set point will rise automatically in winter. The set point can also be
changed manually. Use the up or down arrow keys to set the hot water
temperature. The automatic mode is disabled by changing the set point
manually. Press the mode key for 10 seconds will re-enable automatic mode.

The unit is pre-set to the recommended setting for all parameters. Should
you wish to change these settings, you would be advised to discuss your
decision with the ESP technical team. The default settings are as follows:

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Function Parameter Default

Target set point

0 55

℃

Return temperature difference

1 5

℃

Set point for elec. Heater

2 55

℃

If temp is not reached within this time, elec heater will boost.

3 40

Target temp. for weekly sterlilization

4 60

℃

Time for sterilization

5 0min

Defrosting time

6 45min

Evaporator Trigger Temp. For defrost cycle

7

-3

℃

Trigger temp to end defrost cycle.

8 13

℃

Defrost cycle period.

9 8min

Adjustment for the elec. Expansion valve

10

1

Target degree of superheat

11

5

℃

Steps of elec. Expansion valve

12

35

Use elec. Heater instead of compressor

13

0

Temp. to use elec. Heater instead of compressor

14 5

℃

Energy saving defrosting

15

0

Min. time for energy saving defrosting

16 3min

Power off memory

17

1

Time to start sterilization (Midnight)

18 Oh

Days to start sterilization (Weekly)

19 7d

Temperature compensation

20

0

Ambient temp. to start temperature compensation

21 15

℃

Max. error for temperature compensation

22 5

℃

Coefficient for temperature compensation

23 0.8

℃

Notes:
Engineer Only Setting

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Fault

Display

Code

Reason

So lut io n

Turn on

Ru nning

Bot tom sens or failur e

P 01

The sensor is open or short circuit

Chec k and rep lace the botto m temp. sens or

Upp er s ens or f ailur e

P 02

The sensor is open or short circuit

Ch eck and rep la ce the u pp er te mp. se ns or

Co il s ens or f ai lur e

P 03

The sensor is open or short circuit

Ch eck and rep la ce the co il

tem p. sens or

Suc ti on s ensor fai lur e

P 04

The sensor is open or short circuit

Che ck and r epl ace the suctio n t emp .sen sor

Ambient s ens or f ail ur e

P 05

The sensor is open or short circuit

Ch ec k and r ep la ce the a mbi ent t em p. se nso r

High pr essure prot ection

E 01

The high pressure is over 21bar or
pressure switch is open.

Ch eck co nne cti on and r efr ige ran t
sy ste m.

Low pre ss ure pro tec tio n

E 02

The low pressure switch is open.

Ch eck co nne cti on and r efr ige ran t
sy ste m.

Therm al pr otect ion

E 03

Water temperature is more than
85°C.

Ch eck if the vessel is full.

Com mun icat ion failure

E 08

Communication cable is disconnected or
there is strong interference near the unit.

Ch eck the c onn ect io n of th e pc b.

Defrosting

Flash

14.0 TROUBLESHOOTING

15.0 MAINTENANCE REQUIREMENTS

15.1 The Cylinder

To ensure the continued optimum performance of the Ecocent, it should be
regularly maintained. This is of particular importance in hard water areas or
where the water supply contains particulate matter. Maintenance should be
carried out by a suitably qualified plumber/engineer and any replacement
parts used must only be ESP recommended spare parts. It is recommended
that maintenance is carried out every 12 months on the cylinder and includes
the checks detailed in this manual. If you are in a hard water area, you
should check the magnesium sacrificial anode deterioration within 6 months
of commissioning of the unit and annually 12 months after. You will be able
to see the rate at which deterioration is happening and set a date for a full
inspection when it is clear that a new magnesium anode is likely to be
needed. Keeping a functioning magnesium anode is critical to the longevity
of the unit. If you run the unit without the anode you will invalidate the

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warranty/guarantee and the stainless steel cylinder may be seriously
damaged.

In hard water areas consideration should be given to periodically descaling
the immersion heater elements. To do this the unit will need to be drained;
Paragraphs 16.4 to and 16.6 below detail how to drain the unit and remove
the immersion heater(s).

Please check the condition on the magnesium anode during any
servicing/maintenance and fit a new anode, if required.

15.2 Safety Valves

Slowly open the Temperature and Pressure Relief Valve by twisting its cap
for a few seconds. Check that water is discharged and that it flows freely
through the tundish and discharge pipework. Check valve reseats correctly
when released.

NOTE : The water discharged may be very hot.

Repeat the procedure for the Expansion Relief Valve (located on the Cold
Water Combination Valve or Expansion Valve Core Unit).

15.3 The Strainer

The in line strainer must be cleaned periodically by a suitably qualified
engineer. The in-line strainer can be found inside the cold water combination
group valve on unvented systems or alternatively a Y strainer on open vented
systems. The engineer should:

i) Wash any particulate matter from the inline strainer under clean
running water.

ii) Refit the inline strainer once totally clean or install a new one
where necessary.

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15.4 Draining the Unit

Switch off the electrical supply to the unit. Turn off the mains water supply
to the unit. Attach a hosepipe to the drain cock having sufficient length to
take waste water to a suitable discharge point below the level of the unit, at
least one metre below the unit is recommended. Open the hot water tap
nearest to the unit to relieve the system pressure. Open the drain cock. If
water fails to drain from the unit, vent it by manually opening the

Temperature/ Pressure Relief Valve or “crack a joint” in the unit plumbing to

prevent the creation of a vacuum that may prevent effective draining.

15.5 Descaling the Immersion Heater

Once the unit has been drained and the power supply disconnected, open the
cover to the immersion heater housing and disconnect wiring from
immersion heater. Remove the thermostat by carefully pulling it outwards
from the immersion heater. Unscrew t h e immersion heater back nut and
remove the immersion heater from the unit. Over time the immersion
heater gasket may become stuck to the mating surface. To break the seal
insert a round bladed screwdriver into one of the pockets on the immersion
heater and gently lever up and down.
Carefully remove any scale from the surface of the element. DO NOT use a
sharp implement as damage to the element surface could be caused. Ensure
that all sealing surfaces are clean and that the seals are undamaged; if in
doubt fit a new gasket.

Replace immersion heater ensuring that the lower (right angled) element
hangs vertically downwards towards the base of the unit. It may be helpful to
support the immersion heater using a round bladed screwdriver inserted
into one of the thermostat pockets whilst the back nut is tightened. Replace
the thermostat(s) by carefully plugging the two male spade terminations on
the underside of the thermostat head into the corresponding terminations
on the element.
Rewire the immersion heater. Close and secure terminal cover.

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15.6 Refilling the System

DO NOT switch on the immersion heater or heat pump part until the

system has been completely refilled. Close the unit drain tap. With the hot
tap open, turn on the mains water supply. When water flows from the hot
tap allow time to purge all th e air and to flush through any disturbed
particles. Turn off the hot tap and then open successive hot taps in system
to purge any air. The electrical supply can now be switched on.

15.7 Log Book

Please complete the log book supplied with the Ecocent, stating what has
been done, the date of the service and the name/contact details of the
servicing engineer.

15.8 Maintenance Requirements

There are no formal annual maintenance requirements. However, it is
advisable to check annually that:

a) The pressure and temperature relief valve is still functioning properly

by turning the plastic black cap around to make sure that water
comes out of the valve when the black cap is turned.

b) All filters are clear of debris.

c) The air outlet to outside to make sure that it is clear from foliage,

nests, etc. and that the gravity vent is working.

Please note that the top can be removed (by a suitably qualified engineer/
plumber) so that the evaporator can be cleaned of dust and any debris.

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16.0 FAULT FINDING

Fault Possible Causes Remedy

1) Mains cold water supply shut

Check and open isolation

No hotwater flow

2) Line strainer blocked

Turn off mains water
supply, remove and clean
inline strainer

or reduced flow rate

3) Cold water combination
valve fitted incorrectly

Check direction flow arrows
on valve and correc in

4) Size of service pipe too small

Upgrade service pipe to
correct size

5) Low mains water pressure

Check water pressure.
Consult with local water
authority if necessary

1) Unit is turned off Ensure unit us turned on.

2) Unit is in holiday mode

Reset programmer to
standard running parameter

Water from hot taps is
cold

3) Check for error codes on
Ecocent controller

Refer to manual error code
sheet

4) Parameter zero set to low

Reset parameter zero with
up arrow to a max of 60°C

5) All hot water has been
exhausted

Turn on immersion heater
manually to boost recovery
time

1) Pressure above 7bar. Failure
of pressure reducing set

Replace cold water
combination group set

Discharge from TPRV

2) Temperature above 90-95°C
thermal probe activated

Ascertain reason for high
temp and replace TPRV

3) Water dripping from TPRV,
Expansion vessel failure or
discharged

Recharge expansion vessel
or replace

Discharge from cold

1) Pressure above 6bar. Failure
of pressure reducing set

Replace cold water
combination group set

water combination
group set (CWCGS)

2) Water dripping from CWCGS
safety valve, Expansion vessel
failure or discharged

Recharge expansion vessel
or replace

Cloudiness in water

In some areas a cloudiness may
be noticed in the hot water.

This is due to aeration of
the water, is quite normal
and will quickly clear.

The following table lists simple faults and actions that can be attempted to
clear the fault. Please ensure that a suitably qualified and experienced
engineer/plumber makes any diagnoses and carries out any testing and
repair.

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17.0 GUARANTEE

Should any factory fitted Temperature and/or Pressure Relief Valve(s) or
other safety device be tampered with or removed, or any recommended
Temperature or Pressure Relief Valves/safety device be omitted, your
warranty/guarantee will be invalidated. ESP will not take responsibility for
any damage resulting from the tampering, howsoever caused, save where
such exclusion is unlawful.

17.1 Guarantee Terms

ESP warrants/guarantees the electrical parts, thermal controls and valves
relating to the cylinder for a period of one year from the date of purchase,
with the exception of normal wear-and-tear including any damage caused as
a result of lime scale deposits.

The stainless steel vessel forming part of the cylinder is warranted/
guaranteed for a period of five years against faulty manufacture or materials
provided that:

i) It has been properly installed by a qualified installer as per the
instructions and recommendations contained in this manual and all
relevant Codes of Practice and Regulations in force at the time of
installation.

ii) Any disinfection has been carried out in accordance with BS 6700.

iii) It has not been modified in any way other than by ESP.

iv) It has only been used for the storage of wholesome water.

v) It has not been installed in a location liable to be subjected to
frost, nor has it been tampered with or been subjected to misuse or
neglect.

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vi) No factory fitted parts have been removed for unauthorised repair
or replacement.

vii) Within 45 days of purchase the user completes and returns the
certificate supplied to register the product.

The compressor in the heat pump is warranted/guaranteed for 2 years
from the date of purchase. Remaining parts of the heat pump are
warranted/ guaranteed for 1 year from the date of purchase.
Evidence of purchase and date of supply must be submitted with any
warranty/guarantee claim.

This warranty/guarantee is not valid for installations outside the United
Kingdom or the Republic of Ireland.

Any warranty/guarantee is for replacement parts only.

The purchaser of the unit acknowledges that he/she has seen ESP’s
conditions of supply and has understood them.

All of our units are RoHS approved units.

This guarantee does not affect your statutory rights.

18.0 ENVIRONMENTAL INFORMATION

This product is made from many recyclable materials, therefore at the end of
its useful life, it should be disposed of at a Local Authority Recycling Centre
in order to realise the full environmental benefits.

Please note:
The pace of product development is such that we reserve the right to
change product specifications without notice. We do, however, strive to
ensure that all information in this leaflet is accurate at the time of
publication.

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19.0 SPARE PARTS

Earth Save Products Limited carries spare parts for all the units that it
supplies. We strive to ensure that spare parts are readily available at
competitive prices. Please call on 00 44 (0)1865 40 77 69 us should you need
any spare parts and we will be pleased to give you a quotation.