ESP Ecocent 100L User 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.
2.3 Operating Notes
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.
2.4 Moving and Repair Notes
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.

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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).
2.5 Siting and Safety Notes
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.
2.6 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
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.
Air Inlet
Air Outlet

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6.0 TECHNICAL SPECIFICATIONS

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Model
ESP400-003-100L(D)
Heating capacity
kW
1.0
Water tank capacity
L
100L
Power input
kW
0.27
Running current
A
1.2
Power supply
230V~/50Hz
Compressor number
1
Compressor Type
Rotary
Rated outlet water temp.
°C
55
Noise
dB(A)
45
Water inlet/outlet size
inch
1/2
Net dimensions
mm
see the diagram
Shipping dimensions
mm
see package label
Net weight
kg
see nameplate
Shipping weight
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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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:
Volume
Time
10l
32 mins
15l
47 mins
20l
63 mins
30l
95 mins
40l
126 mins
65l
205mins

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But, because the Ecocent unit uses waste heat, the expected recovery times
are likely to be much shorter and the following table is indicative of more
normal recovery times:
Volume
Time
10l
24 mins
15l
36 mins
20l
48 mins
30l
72 mins
40l
97 mins
65l
157mins
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