EC-Eau Cylinder Range
Installation and User Instructions
Direct Electric and
Indirect Cylinders
Up to 300L
Important - This manual must be left with the user after Installation!
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Dimplex is a licensed member of the Benchmark Scheme which aims to improve
the standards of installation and commissioning of domestic heating and hot
water systems in the UK and to encourage regular servicing to optimise safety,
Benchmark places responsibilities on both manufacturers and installers. The
purpose is to ensure that customers are provided with the correct equipment for
their needs, that it is installed, commissioned and serviced in accordance with
the manufacturer’s instructions by competent persons and that it meets the
requirements of the appropriate Building Regulations. The Benchmark Checklist
can be used to demonstrate compliance with Building Regulations and should be
Installers are required to carry out installation, commissioning and servicing work
in accordance with the Benchmark Code of Practice which is available from the
Heating and Hot Water Industry Council who manage and promote the Scheme.
Visit www.centralheating.co.uk for more information.
The HWA Charter requires that all members adhere to the following:
For further information on the HWA Charter Membership, please refer to the
HWA website www.hotwater.org.uk’
efficiency and performance.
provided to the customer for future reference.
supply fit for purpose products clearly and honestly described
supply products that meet, or exceed appropriate standards and
building and water regulations
provide pre and post sales technical support
provide clear and concise warranty details to customers
Overall View
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0 Overall View
Figure 1: Overall view of Direct Electric Cylinder Installation Process
Overall View
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Figure 2: Overall view of Indirect Cylinder Installation Process
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Contents
1 Contents
0 Overall View ...............................................................................................3
1 Contents ....................................................................................................5
2 Introduction ...............................................................................................7
3 Scope of delivery ........................................................................................7
4 Pre-Installation Advice .................................................................................9
4.1 Risk assessment ......................................................................................9
4.2 Siting considerations ................................................................................9
4.3 Cold water supply .................................................................................. 10
4.4 Building regulation G3 Discharge requirements .......................................... 11
4.4.1 Discharge pipe D2............................................................................ 12
4.4.2 Worked example .............................................................................. 13
4.4.3 Termination of discharge pipe ........................................................... 14
4.5 Limitations ............................................................................................ 15
5 Installation ............................................................................................... 15
5.1 Cold Water Inlet with Inlet Control Group .................................................. 15
5.1.1 Correctly site the cylinder ................................................................. 15
5.1.2 Install the inlet group ....................................................................... 15
5.1.3 Expansion vessel ............................................................................. 15
5.1.4 Balanced cold water supply ............................................................... 16
5.1.5 Drain valve ..................................................................................... 16
5.2 Hot Water Outlet .................................................................................... 16
5.2.1 Thermostatic mixing valve ................................................................ 16
5.2.2 Pipe insulation ................................................................................. 16
5.3 Discharge pipes from safety devices ......................................................... 16
5.3.1 Discharge pipe D1............................................................................ 16
5.3.2 Discharge pipe D2............................................................................ 17
5.3.3 Tundish .......................................................................................... 17
5.4 Immersion heater .................................................................................. 18
5.5 Coil flow connections (indirect models only) .............................................. 18
5.6 Coil return connections (indirect models only) ........................................... 18
5.7 Thermostat connection (indirect models only) ............................................ 19
5.8 Connection of Secondary Return .............................................................. 22
6 Commissioning ......................................................................................... 23
7 Maintenance ............................................................................................. 24
8 Spare Parts .............................................................................................. 26
9 Technical Data and Product Fiche ................................................................ 27
9.1 Cylinder heat exchanger pressure drop ..................................................... 33
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Contents
10 User Instructions....................................................................................... 34
10.1 General ............................................................................................. 34
10.2 Operation .......................................................................................... 35
10.2.1 Water temperature direct electric heating ........................................... 35
10.2.2 Water temperature auxiliary heating .................................................. 36
10.3 Maintenance ....................................................................................... 36
10.4 Troubleshooting .................................................................................. 37
Scope of Delivery
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2 Introduction
Thank you for choosing a Dimplex
product. The EC-Eau direct electric and
indirect cylinders are specified with
high quality, long-life immersion
heaters and large surface area coils for
fast reheat times. They boast 60mm of
low GWP insulation foam, together with
100% recyclable stainless steel inner
components and a sleek black, hard
wearing outer shell manufactured from
completely recycled materials. For
more detailed information on product
features, please see the Technical Data
section in this manual.
NOTE: This product has been designed
specifically for the purpose of
delivering heated, domestic and
sanitary hot water as part of a
pressurised water heating system. The
package is provided with fittings that
comply with Section G3 of Building
Regulations.
WARNING: Dimplex cannot take
responsibility for ensuring safe
operation of the appliance outside
of the scope of intended use.ly
3 Scope of delivery
Please ensure you check the scope of
delivery below before signing any
delivery documentation. Claims for
missing or damaged parts after signing
for the delivery will not be accepted.
* These items are supplied factory
fitted
Table 1: Scope of Delivery for Direct
Electric Cylinders
Table 2: Scope of Delivery Direct Cylinders
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Scope of Delivery
* These items are supplied factory fitted
Table 3: Scope of Delivery for Indirect Cylinders
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Pre-Installation
4 Pre-Installation
Advice
Please read the following section
carefully before commencing
installation. If in any doubt, please call
the appropriate help desk.
Disregarding the instructions given in
this manual in its entirety and any
relevant regulations, standards and
codes of practice will void the
guarantee of this product.
Handling – depending on the size of
the unit and access to its installation
location, consideration must be given
to the handling of the unit. Please note
that handling, installation and use of
this product is subject to the Health
and Safety at Work Act.
If the unit is not installed immediately,
it should remain in its protective
packaging with all pipe protectors/end
caps applied to prevent damage and
dirt deposit inside the cylinder and the
coils.
Pipe work – the pipe runs should be
executed as short as possible, unused
pipe work should be removed and all
remaining pipe work should be lagged
in accordance with regulatory
requirements to prevent heat loss and
the formation of condensation.
Taps and fittings – all taps and
fittings incorporated in the unvented
system should have a rated operating
pressure of 0.6 MPa (6 bar) or above.
4.1 Risk assessment
The compilation of a risk assessment is
strongly recommended before
installing the product. The following
areas require particular consideration
in addition to the information required
by the Health and Safety at Work Act.
- scalding: where appropriate or
required by law a thermostatic
mixing valve is to be fitted to the hot
water outlet of the cylinder (see also
water borne organisms).
- explosion: the unit is fully equipped
with all relevant safety equipment to
comply with current regulations. The
correct design and function has been
verified by independent third party
testing. The correct application
thereof is the responsibility of the
competent installer.
- water borne organisms (i.e.
Legionella): if applicable a risk
assessment should be carried out
following the recommendations
outlined in the Approved Code of
Practice L8.
- the user preference must be
considered when commissioning the
system, in particular when adjusting
the solar and auxiliary system
temperature and timer settings.
4.2 Siting considerations
When choosing a suitable location for
the cylinder the following aspects
should be considered:
- structural integrity
- access for installation, operation,
maintenance and replacement
- routing of discharge pipe work
- access to water mains supply, hot
and cold water distribution pipe work
- access to suitable electricity supply
- location in relation to remaining
system components such as
auxiliary and solar heating system
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Pre-Installation
Minimum dynamic
pressure
150 kPa
(1.5 bar)
Maximum inlet supply
pressure
1200 kPa
(12 bar)
Minimum flow rate
15 l/min
Max. chlorine content
250mg/L
Max. water hardness
200mg/L
- frost protection
The direct electric and indirect cylinder
ranges are designed to be floor
standing, vertically mounted, indoors
and in a frost free environment. The
cylinder may be located on any flat and
level surface, provided it is sufficiently
robust to support the weight of the
cylinder when full of water (please see
technical data) and suitably accessible
for replacement/maintenance without
specialist tools or lifting equipment as
this will void the warranty conditions.
The position and orientation of the
cylinder should be such that easy
access is provided for servicing the
controls. A minimum distance of
400mm in front of the immersion is
recommended, to allow the
replacement of the immersion heater
should the need arise. When installing
the cylinder all labels should be clearly
visible and ensure that no pipework
hinders any work to be carried out on
the various cylinder components.
Particular care must be taken when
placing the cylinder in a garage or
outbuilding. All exposed pipe work
must be correctly insulated to avoid
frost damage.
CLEANING INSTRUCTIONS:
Clean outer cladding of
cylinder with a soft cloth
dampened with warm water
only. Do not use abrasive or
aggressive cleaning
materials, such as alcohol or
petroleum based solvents, as
this may damage the surface
of the product.
4.3 Cold water supply
For satisfactory and safe performance
of the unvented cylinder the water
supply must meet the following
criteria:
The following instructions have to be
followed when installing the cold water
mains supply to the cylinder:
- The cold water supply to the cylinder
must come directly from the cold
water mains after the mains stop
valve to the property.
- The cold water inlet pipe work should
have at least an inside diameter of
19mm and should meet the
requirements of the water
regulations for the supply of
wholesome water.
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Pre-Installation
Dimplex recommend an annual
maintenance inspection is carried out
on the domestic hot water cylinder. In
hard water areas this should include
inspection of the heat exchanger and
immersion heater, [above 120ppm or
120mg/l]. A local water treatment
company should be able to offer free
water quality testing. The heating
elements may require periodic descaling. The installer should do this as
part of a maintenance agreement.
If required, precautions can be taken
to minimise effects of water hardness,
i.e. installation of water conditioner or
water softener. These devices should
be installed in hard water areas where
high water storage temperatures are
required, i.e. greater than 60°C
storage temperatures, particularly
when water hardness exceeds
200ppm. Should the water cylinder
require de-scaling, this must be
performed by a qualified technician.
4.4 Building regulation G3
Discharge
requirements
As part of the requirements of Building
Regulation G3 any discharge from an
unvented system should be conveyed
to where it is visible, but will not cause
danger to persons in or about the
building. The tundish and the discharge
pipes should be fitted in accordance
with the requirements of Building
Regulation approved document G3,
(England and Wales), Part P of
Northern Ireland and Standard 4.9 of
Scotland.
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Pre-Installation
4.4.1 Discharge pipe D2
The discharge pipe (D2) from the
Tundish should:
- “have a vertical section of pipe at
least 300mm long below the
tundish before any elbows or
bends in the pipework and be
installed with a continuous fall of
at least 1 in 200 thereafter.”
The discharge pipe (D2) should be
made of:
- “metal; or other material that has
been demonstrated to be capable
of safely withstanding
temperatures of the water
discharged and is clearly and
permanently marked to identify
the product and performance
standard”
Dimplex strongly recommends the use
of metal pipework only and Dimplex
does not take responsibility for any
damage caused from discharges.
The discharge pipe D2 should be at
least one pipe size larger than the
nominal outlet size of the safety device
unless its total equivalent hydraulic
resistance exceeds that of a straight
pipe 9m long, i.e. for discharge pipes
between 9m and 18m the equivalent
resistance length should be at least two
sizes larger 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. See
Figure 3, Table 4 and the worked
example.
Note: An alternative approach for
sizing discharge pipes would be to
follow Annex D, section D.2 of BS
6700:2006 + A1:2009).
Figure 3: Typical discharge pipe arrangement
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Pre-Installation
Table 4: Sizing of copper discharge pipe “D2” for common temperature relief valve outlet sizes
4.4.2 Worked example
This example is for a G½ temperature
relief valve with a discharge pipe (D2)
(as fitted on 125 to 300L cylinders)
having 4 No. 22mm elbows and length
of 7m from the tundish to the point of
discharge.
From Table 4, the maximum resistance
allowed for a straight length of 22mm
copper discharge pipe
(D2) from a G½ temperature relief
valve is 9.0m. Subtract the resistance
for 4 No. 22mm elbows at 0.8m each
= 3.2m.
Therefore the maximum permitted
length
equates to 5.8m, which is less than the
actual length of 7m, therefore calculate
the next largest size.
Maximum resistance allowed for a
straight length of 28mm copper
discharge pipe (D2) from a G½
temperature relief valve is: 18m
Subtract the resistance for 4 No. 28mm
elbows at 1.0m each = 4m
Therefore the maximum permitted
length equates to 14m.
As the actual length is 7m, a 28mm
(D2) copper pipe will be satisfactory.
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- Where a single common discharge
pipe serves more than one system,
it should be at least one pipe size
larger than the largest individual
discharge pipe (D2) to be connected.
- The discharge pipe should not be
connected to a soil discharge stack
unless the soil discharge stack is
capable of safely withstanding
temperatures of the water
discharged, in which case, it should:
- contain a mechanical seal, which
allows water into the branch pipe
without allowing foul air from the
drain to be ventilated through the
tundish.
- there should be a separate branch
pipe with no sanitary appliances
connected to it.
- if plastic pipes are used as branch
pipes carrying discharge from a
safety device, they should be
either polybutalene (PB) or crosslinked polyethylene (PE-X)
complying with national
standards.
- be continuously marked with a
warning that no sanitary
appliances should be connected to
the pipe.
4.4.3 Termination of
discharge pipe
- “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.”
- Examples of acceptable discharge
arrangements are:
- “to a trapped gully with the end of
the pipe below a fixed grating and
above the water seal;
- 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 a wire
cage or similar guard is positioned to
prevent contact, whilst maintaining
visibility; and ,
- discharges at high level: e.g. into a
metal hopper and metal downpipe
with the end of the discharge pipe
clearly visible or onto a roof capable
of withstanding high temperature
discharges of water and 3m from any
plastic guttering system that would
collect such discharges.”
Note: As the discharge would
consist of high temperature water
and steam, asphalt, roofing felt
and non-metallic rainwater goods
may be damaged by such
discharges.
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Installation
4.5 Limitations
Due to the operating temperatures of
direct electric water heaters the water
hardness can considerably influence
the longevity of the immersion heater
element. Please consult local water
board for advice on maintenance
intervals.
5 Installation
5.1 Cold Water Inlet with
Inlet Control Group
5.1.1 Correctly site the
cylinder
Install the cylinder in an appropriate
location, ensuring all of the
recommendations have been
considered (see chapter 4.2).
5.1.2 Install the inlet group
The inlet group regulates the pressure
of the incoming mains water supply to
the cylinder and removes any debris
that might be water borne.
Note: Between the inlet group and
the cold water inlet on the cylinder
NO isolating device may be fitted,
as by doing so important safety
devices could be isolated!
5.1.3 Expansion vessel
The expansion vessel is mandatory on
all EC-Eau cylinders and can be
connected directly to the cold water
inlet group, utilising the flexible hose
supplied with the vessel. The
expansion vessel should always be
fitted in accordance with the
manufacturer’s instructions. No
isolating device must be fitted between
the water cylinder and the cold water
inlet group.
Furthermore, it is recommended to
mount the vessel higher than the
cylinder to avoid having to drain the
cylinder when maintaining and
replacing the expansion vessel.
Figure 4: Connection of the expansion
vessel to the inlet group
It is important to check the
pre-charge pressure of the
expansion vessel membrane
before filling the cylinder. The
pre-charge should be greater
than or equal to 3 bar.
Note: The expansion vessel must
be installed to the side of the
expansion relief valve on the inlet
group. To do this the blanking plug
must be removed and the
expansion vessel connected, as
shown in Figure 5.
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Installation
Expansion
Connection
Balanced
Supply
Expansion
Valve
Cold
Cylinder
Cold
Mains
Water
from
Relief
Cold Water
Water to
Figure 5: Detail showing the connection of
the expansion vessel to the inlet group
5.1.4 Balanced cold water
supply
If a balanced cold water supply is
required a connection can be taken
from the bottom of the inlet group.
5.1.5 Drain valve
It is also recommended to install a
drain valve (not supplied) in the lowest
point of the cold water feed to the
cylinder. This allows the cylinder to be
drained in a controlled manner should
this become necessary.
5.2 Hot Water Outlet
The hot water pipe work is to be
directly connected to the hot water
outlet connection on the cylinder, see
Figure 1.
Vessel
5.2.1 Thermostatic mixing
valve
A thermostatic mixing valve may be
required to limit the outlet
temperature. In this case, the valve
should be installed following the
manufacturer’s instructions, ensuring
none of the safety equipment has been
isolated, (i.e. make sure the
connection to the thermostatic mixing
valve is taken after the safety
equipment of the inlet group).
5.2.2 Pipe insulation
It is recommended to insulate the hot
water pipe work from the cylinder to
the outlets, to reduce the energy
requirements for providing hot water.
It is also recommended to insulate all
other exposed pipework, such as the
T&P to the tundish, the coil flow and
return and the cold water inlet pipes.
5.3 Discharge pipes from
safety devices
5.3.1 Discharge pipe D1
- The temperature and pressure relief
valve must be discharged directly or
by way of a manifold via a short
length of metal pipe (D1) into a
tundish; and the discharge pipe must
be installed in a continuously
downward direction and in a frost
free environment. Water may drip
from the discharge pipe of the
pressure relief device and this pipe
must be left open to the atmosphere.
- The diameter of discharge pipe (D1)
should not be less than the nominal
outlet size of the safety device, e.g.
temperature relief valve.
- Where a manifold is used it should be
sized to accept and discharge the
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Installation
+
total discharge from all the D1
discharge pipes connected to it.
- The discharge pipe work from the
expansion relief valve must be
installed constantly falling to an open
point of discharge. It is
recommended to combine it with the
discharge of the temperature and
pressure relief valve.
Note: The T&P valve is pre-sealed
and if moved the seal will be
broken, should this occur, it will
need to be resealed with an
appropriate sealant (Dimplex part
number R00836-1).
5.3.2 Discharge pipe D2
For a detailed description of the
discharge pipework D2 see chapter
4.4.1.
5.3.3 Tundish
- The tundish should be vertical,
located in the same space as the
unvented hot water storage system
and be fitted as close as possible to,
and lower than, the safety device,
with no more than 600mm of pipe
between the valve outlet and the
tundish (see Figure 3).
- Discharge should be visible at the
tundish, where discharges may not
be apparent, e.g. in dwellings
occupied by people with impaired
vision or mobility, consideration
should be given to the installation of
a suitable safety device to warn
when discharge takes place, e.g.
electronically operated.
Note: To comply with the Water
Supply (Water Fittings)
Regulations, the tundish should
incorporate a suitable air gap.
It is important that the tundish
is positioned away from any
electrical components.
Figure 6: Wiring diagram for Immersion Heater
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Installation
5.4 Immersion heater
The immersion heater has to be
connected in accordance with IEE
Wiring Regulations and the installer
carrying out the work has to be suitably
qualified. It must be connected
through a double pole isolating switch
or suitable controller which must have
a contact separation of at least 3mm in
all poles. The wiring diagram can be
seen in Figure 6. For further details
please see instructions provided with
the immersion heater.
The immersion heater incorporates an
independent non-self resetting over
temperature cut-out. Should the over
temperature cut-out operate, the reset
pin will be pushed upwards, and
become level or slightly proud of the
cover at the position marked “Safety”.
Use a suitable sized implement to reset
the pin by pushing it hard into its
original position.
Note: Should it be necessary to
remove the thermostat from the
immersion element, ensure that
the contacts are re-fitted correctly
into the positions on the element.
Failure to do so carries the risk of
overheating the contacts and thus
damaging the appliance.
The immersion heater thermostat must
not be opened under any
circumstances.
Note: The cylinder must be filled
with water before switching on the
immersion heater. Failure to do so
will damage the element and void
any guarantee on the product.
5.5 Coil flow connections
(indirect models only)
If the flow connection is the highest
point in the indirect heating loop and if
the system was not commissioned
using a flush and fill pump, an
adequate device for de-aeration must
be installed.
5.6 Coil return
connections (indirect
models only)
If the return connection is the lowest
point in the indirect heating loop, a
suitable drain device should be
installed. For location of connections
see Figure 2.
It is recommended that the fittings
used to connect to the cylinder are
suitable for stainless steel, the flow and
return should use 22mm compression
fittings. Not all push fit fittings can be
used – please check with your supplier.
When using compression fittings,
ensure that the connection is not overtightened.
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Installation
NOTE: T1 and T2 must be connected. T3 can replace T2 only
when a normally open configuration is required.
To indirect pump/
two port valve
From control unit
stat
temp cut
out stat
2 1 1
2
3
T4
Earth
A
To access the wire connections of the Dual Cut Out, only component A has to be
removed.
5.7 Thermostat
connection (indirect
models only)
The indirect heating source can be
connected to the cylinder in various
ways as described by the system
supplier. The wiring and installation
principles for two typical integration
methods are detailed in Figure 8 and
Figure 9.
To conform to building regulations, it is
imperative that any heat generator
connected to the cylinder is installed
through the correct twin thermostat,
which is factory fitted to the cylinder.
The two port valve supplied with the
indirect cylinder is to be installed by
default into the heating loop. For
access to the thermostat wiring see
Figure 7.
High
Temp
control
Figure 7: Thermostat Wiring Schematic
Installation
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Figure 8: Auxiliary loop wiring details - 2 x two port valves
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Figure 9: Auxiliary loop wiring details – Three port mid-position + 2 port valve
Installation
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To Taps
From Taps
HW Outlet
Swept-T
5.8 Connection of
Secondary Return
For cylinders that do not have a
dedicated secondary return
connection, it is possible to install a
secondary return by connecting a
swept - T to the cold water inlet of the
cylinder (see Figure 10).
The secondary return pipe should
incorporate a check valve and a WRAS
approved circulation pump; timer and
thermostat to be provided separately.
Where secondary return circuits are
used, then an additional expansion
vessel may be required.
The secondary return loop must avoid:
- stagnant water in long pipe runs
- long waiting times at draw off point
for hot water
- undue water wastage
To minimise the energy consumption of
the secondary return circuit and to
ensure reliable operation it is important
to consider:
- the control of the circulation pump to
be time and temperature controlled
- the secondary return circuit pipe
work to be insulated
- the secondary return pump to be of
suitable material and specification
Figure 10: Secondary return loop
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Commissioning
6 Commissioning
At the time of commissioning,
complete all relevant sections of the
Benchmark Checklist located on the
inside back pages of this document.
The following commissioning
procedures only detail the required
steps to be taken for the potable water
loop:
1) Before making any mains
connections to the inlet control
group, flush the mains pipework
out to ensure all debris has been
removed so as not to damage the
strainer within the combination
valve.
2) Make final mains connection on
combination valve and check all
connections and joints to ensure
they have been tightened and
secured correctly.
3) Before turning on the mains
supply to the cylinder a hot water
tap should be opened, preferably
on the same floor or the floor
below where the cylinder is
located.
4) Check the pre-charge in the
expansion vessel and ensure it is
at least 3 bar. Note actual
pressure on label on expansion
vessel.
5) Turn on the supply to the cylinder
and fill until water runs from the
open hot water tap. Continue to
flush the system until all debris
has been removed.
6) Close the hot water tap.
7) Check all joints for leaks, even
those not having been altered
especially when replacing a vented
cylinder.
8) Open temperature and pressure
relief valve to ensure proper
discharge and check after closing
that valve is not dripping.
9) Open expansion relief valve to
ensure proper discharge and
check after closing that valve is
not dripping.
10) Check all shower outlets, toilet
cisterns and other draw off points
for leaks or dripping (especially
when replacing a vented unit).
Open all water outlets to purge air
from pipe work and ensure proper
operation.
11) Adjust immersion heater
thermostat in accordance with
client requirements.
12) Instruct user in the operation of
the unit and hand over this manual
advising the owner of annual
service requirements.
13) Complete the technical data label
on the cylinder with legible and
permanent writing.
Installat
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24
Maintenance
7 Maintenance
After servicing, complete the relevant
Service Record section of the
Benchmark Checklist located on the
inside back pages of this document. To
meet with warranty requirements the
cylinder must be serviced annually.
1) Draw some water from cold water
2) Isolate cold water mains supply
3) Briefly open temperature and
4) Briefly open expansion relief
5) Open hot water tap and release
6) If the system is drained
The maintenance of this
appliance must be carried
out by a suitably qualified
person only. It is
recommended to maintain
the unit on an annual basis.
Isolate all electrical
supplies from the unit
before commencing work.
Danger of electrical shock!
tap and retain in container.
from cylinder.
pressure relief valve, assure safe
discharge and check that valve is
not dripping when closed.
valve, assure safe discharge and
check that valve is not dripping
when closed. The expansion relief
valve should be operated regularly
to remove lime deposits and to
verify that it is not blocked.
remaining pressure from unit.
completely for an internal
inspection, ensure the hot water
tap remains open, connect a hose
to the drain valve and ensure a
safe discharge.
7) Note the set pressure of the
pressure reducing valve. Remove
cartridge and clean strainer in
water provided in container. Reassemble pressure reducing valve
ensuring the correct pressure is
set.
8) Periodically the immersion heaters
should be removed cleaned and
the unit flushed out. Check the Oring seal for damage and replace if
necessary.
9) Check electrical wiring
connections and the condition of
the cable of the immersion heater
and the thermostat.
10) The immersion heater boss can
also be used for access to view the
internal components of the
cylinder.
11) Re-commission unit (see chapter
6).
If the cylinder is not in use for
excess of 1 month, it must be
drained down by a competent
person and recommissioned before
use. Note: The immersion must be
switched off at the mains before
draining the cylinder.
If replacement parts are required,
please see Figure 11 for part
descriptions and part numbers.
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Maintenance
CLEANING INSTRUCTIONS:
Clean outer cladding of
cylinder with a soft cloth
dampened with warm water
only. Do not use abrasive or
aggressive cleaning
materials, such as alcohol or
petroleum based solvents, as
this may damage the surface
of the product.
Waste electrical products
should not be disposed of with
household waste. Please
recycle where facilities exist.
Check with your Local
Authority or retailer for
recycling advice.
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Spare Parts
8 Spare Parts
Figure 11: Replacement part numbers for Direct Electric and Indirect range of cylinders
* ECSd125-580 & ECSd150-580 only, **ECSd210-580 only, ***ECSd250-580 & ECSd300-580
only
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Technical Data
9 Technical Data and Product Fiche
Figure 12: Direct Electric Cylinder and Cross-section (for reference only)
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Technical Data
Direct Electric Cylinder Range - Dimensions
Reference
125
150
210
250
300
Weight [kg]
23
26
33
39
46
Reheat time [mins]*
122
150
218
284
313
Heat Loss [kWh]
0.95
1.10
1.41
1.51
1.96
Height [mm]
945
1115
1490
1765
2065
Outer Diameter [mm]
580
580
580
580
580
HW Outlet [mm]
720
890
1265
1540
1840
T&P valve [mm]
720
890
1265
1540
1840
CW Inlet [mm]
180
180
180
180
180
Bottom Immersion [mm]
200
200
200
200
200
Top Immersion [mm]
560
695
1070
1345
1645
GDC Group Ltd
Direct Electric Cylinder Range – Product Fiche
Reference
ECSd125-
580
ECSd150-
580
ECSd210-
580
ECSd250-
580
ECSd300-
580
Load Profile – Primary
M M M L L
Energy Rating
C C C C C
Energy Efficiency
36%
37%
36%
37%
37%
Annual Energy
Consumption
1411
1389
1435
2739
2774
Load Profile –
Secondary
- - - M M
Set Temperature
60°C
60°C
60°C
60°C
60°C
Sound Level [dB]
15dB
15dB
15dB
15dB
15dB
Operating Mode
Off Peak
Off Peak
Off Peak
Off Peak
Off Peak
V-40
204
242
355
415
490
Note: All measurements are taken from the base of the cylinder to the mid-point on the item.
* Determined in accordance with EN160335 -2-21.
Table 5: Direct Electric Cylinder Product Dimensions
Table 6: Direct Electric Cylinder Product Fiche
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-10 01/16
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29
Technical Data
Direct Electric Cylinder Range – Product Features
Materials
- inner cylinder
Duplex stainless steel LDX2101
- outer cylinder
HIPS
- inlet/outlet
Stainless steel
- insulation
60mm PU foam (GWP=1, ODP=0)
Maximum operating conditions
- potable water temperature
70°C
- operating pressure
3 bar
Cold water supply
- minimum dynamic pressure
1.5 bar
- maximum pressure
12 bar
- minimum flow rate
15 l/min
Connections
- cold water inlet
22mm stainless steel
- hot water outlet
22mm stainless steel
Immersion heater
1 ¾ F BSP 3kW
Thermostatic control
- direct input
integral immersion heater thermostat and cut out
Safety components
- pressure reducing valve and strainer
3 bar
- expansion relief valve
6 bar
- temp. and pressure relief valve
7 bar/90°C
- factory pressure test
12 bar
Other features
Over 60% in volume from recycled materials#
Surface mounted sensor devices for compatibility and
ease of maintenance
Approvals
KIWA approval number:- 1112700
Guarantee
- inner cylinder
25 yrs
- immersion heaters
2 yrs - excluding the effects of lime scale or other water
borne contaminants
- other components
2 yrs - excluding expansion vessel membrane pressure
# Not including insulation
Table 7: Direct Electric Product features
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Technical Data
Figure 13: Indirect Cylinder and Cross-section (for reference only)
Installat
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Technical Data
Indirect Cylinder Range – Product Dimensions
Reference
125
150
210
250
300
Weight [kg]
25
29
36
42
47
Reheat time [mins]*
25
33
31
40
49
HX performance [kW]*
13
12
19
18
18
Heat Loss [kWh/24h]*
0.95
1.10
1.41
1.51
1.96
Height [mm]
945
1115
1490
1765
2065
Outer Diameter [mm]
580
580
580
580
580
HW Outlet [mm]
720
890
1265
1540
1840
T&P valve [mm]
720
890
1265
1540
1840
CW Inlet [mm]
180
180
180
180
180
Bottom Immersion [mm]
200
200
200
200
200
Indirect Return [mm]
180
180
180
180
180
Indirect Flow [mm]
315
315
395
395
395
Bottom Thermostat [mm]
420
420
420
420
420
GDC Group Ltd
Indirect Cylinder Range – Product Fiche
Reference
ECSi125-
580
ECSi150-
580
ECSi210-
580
ECSi250-
580
ECSi300-
580
Energy Rating
B B B B B
Standing Loss
[W]
40
54
59
66
82
Storage Volume
[L]
124
150
210
250
300
Note: All measurements are taken from the base of the cylinder to the mid-point on the item.
* Determined in accordance with EN12897 at 80°C flow temperature and 0.25l/s flow rate.
Table 8: Indirect Cylinder Product Dimensions
Table 9: Indirect Cylinder Product Fiche
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-10 01/16
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32
Technical Data
Indirect Cylinder Range – Product Features
Materials
- inner cylinder
Duplex stainless steel LDX2101
- outer cylinder
HIPS
- inlet/outlet
Stainless steel
- coils
Stainless steel
- insulation
60mm PU foam (GWP=1, ODP=0)
Maximum operating conditions
- potable water temperature
70°C
- heating water temperature
95°C
- operating pressure
3 bar
Cold water supply
- minimum dynamic pressure
1.5 bar
- maximum pressure
12 bar
- minimum flow rate
15 l/min
Connections
- cold water inlet
22mm stainless steel
- hot water outlet
22mm stainless steel
- coil flow and return
22mm stainless steel
Coil specification
- surface area [m²]
0.5
0.8
- rating [kW]*
13
12
18
19
18
18
- max. working pres. Aux.[Bar]
3
Immersion heater
1 ¾ F BSP 3kW
Thermostatic control
- direct input
integral immersion heater thermostat and cut out
- indirect input
integral twin thermostat (10 to 70°C) and cut out
(~85°C)
Safety components
- pressure reducing valve and strainer
3 bar
- expansion relief valve
6 bar
- temperature and pressure relief valve
7 bar/90°C
- factory pressure test
12 bar
Other features
Over 60% in volume from recycled materials#
Surface mounted sensor devices for compatibility and
ease of maintenance
Approvals
KIWA approval number:- 1112701
Guarantee
- inner cylinder
25 yrs
- immersion heaters
2 yrs - excluding the effects of lime scale or other
water borne contaminants
- Other components
2 yrs - excluding expansion vessel membrane
pressure
Table 10: Indirect Product Features
* Determined in accordance with EN12897 at 80°C flow temperature and 0.25l/s flow rate.
# Not including insulation
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Technical Data
0.5m2 Coil Pressure Drop
0
10000
20000
30000
40000
50000
60000
70000
80000
0.0 0.5 1.0 1.5 2.0 2.5 3.0
Flow Rate (m3/h)
Pressure Drop (Pa)
0.8m2 Coil Pressure Drop
0
10000
20000
30000
40000
50000
60000
70000
80000
90000
100000
0.0 0.5 1.0 1.5 2.0 2.5 3.0
Flow Rate (m3/h)
Pressure Drop (Pa)
9.1 Cylinder heat exchanger pressure drop
Figure 14: Heat exchanger pressure drops for 0.5m² and 0.8m² coils
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User Instructions
10 User Instructions
10.1 General
“This appliance is not intended for use
by persons (including children) with
reduced physical, sensory or mental
capabilities, or lack of experience and
knowledge, unless they have been
given supervision or instruction
concerning the use of the appliance by
person responsible for their safety.”
“Children should be supervised to
ensure they do not play with this
appliance.”
Please read the following
statements carefully as it affects
your warranty:
Please ensure that the installer has
fully completed the Benchmark
Checklist on the inside back pages of
this document and that you have
signed it to say that you have received
a full and clear explanation of its
operation. The installer is legally
required to complete a commissioning
checklist as a means of complying with
the appropriate Building Regulations
Part G3 (England and Wales), Part P of
Northern Ireland and Section 6 of
Scotland.
All installations must be notified to
Local Area Building Control either
directly or through a Competent
Persons Scheme. A Building
Regulations Compliance Certificate will
then be issued to the customer who
should, on receipt, write the
Notification Number on the Benchmark
Checklist.
This product should be serviced
annually to optimise its safety,
efficiency and performance. The
service engineer should complete the
relevant Service Record on the
Benchmark Checklist after each
service.
The Benchmark Checklist will be
required in the event of any warranty
work.
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Operation
Dial to adjust water
temperature
+
10.2 Operation
Once the system has been fully
commissioned, no user intervention
should be required to fully enjoy the
comfort and benefits of the unvented
hot water cylinder.
The hot water temperature can be set
to various requirements. It is
recommended to set the indirect hot
water temperature to between 45°C
and 60°C (please refer to Figure 16 for
approximate settings). Higher
temperatures can cause tripping of the
high limit thermostat, introduce more
heat loss from the unit and increase
the risk of scalding significantly.
When turning on a hot tap for the first
time after a heat up period there might
be a short surge of water. This is
normal in unvented systems and does
not constitute a fault. Sometimes the
water may appear milky – this is due
to very fine air bubbles in the water
which will clear quickly.
Figure 15: Adjustment water temperature direct electric heating element
10.2.1 Water temperature
direct electric heating
Before removing the cover
from the immersion heater
isolate appliance using
isolating switch! Danger of
electrical shock! Only use
suitable electrically insulated
equipment when working
inside immersion housing.
The hot water temperature achieved by
the direct electric heating element can
be adjusted by removing the cover
from the immersion heater and
adjusting the dial up or down as
indicated in Figure 15. As a default the
maximum position is selected, which is
equivalent to 60°C.
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Operation
Dial to adjust water
temperature
Manual re-set
10.2.2 Water temperature
auxiliary heating
The water temperature achieved by the
auxiliary heating system depends on
the setting of the thermostat on:
- the cylinder AND
- the auxiliary / solar heating source
Figure 16: Adjustment water temperature auxiliary source
10.3 Maintenance
The maintenance of this
appliance must be carried
out by a suitably qualified
person only. It is
recommended to maintain
the unit on an annual basis.
Isolate all electrical
supplies from the unit
before commencing work.
Danger of electrical shock!
See section 7.
The adjustment at the cylinder is
carried out on the twin thermostat
fitted to the cylinder as shown in Figure
16. In the event that the high
temperature cut-out engages, it will be
necessary to manually reset the
thermostat. Use a suitable electrically
insulated tool to push the manual reset
button and inform the installer.
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Troubleshooting
Fault
Cause
Solution
A No water
from hot
water taps
A.1 Stop valve closed
A.2 Strainer blocked
A.3 Pressure reducing
valve fitted against
flow
A.1 Open stop valve
A.2 Turn water supply off, clean
strainer and re-commission
A.3 Re-fit with arrow showing in
direction of flow
B No hot water
B.1 Timer/Programmer not
set correctly
B.2 Indirect heating
malfunction
B.3 Direct heating
malfunction
B.4 Indirect/direct heating
high limit thermostat
has tripped
B.1 Set timer/programmer
correctly
B.2 Consult indirect heating
system instructions
B.3 Call for qualified person to
check immersion heater
B.4 Reset limit thermostat(s)
and inform installer
C Intermittent
water
discharge
through
tundish on
warm-up
C.1 Expansion vessel lost
charge
C.1 Check expansion vessel (see
commissioning/maintenance
), top up or replace
D Continuous
discharge
D.1 Pressure reducing
valve not working
D.2 Pressure relief or T&P
valve not seating
correctly
D.3 Malfunction of high
limit thermostat or
appliance
D.1 Check pressure after valve
and replace if faulty
D.2 Manually lift valve once or
twice to clear debris,
otherwise replace
D.3 Check function of
thermostats and appliances
E Leakage
from casing
E.1 Compression/threaded
joints not formed
correctly
E.1 Re-seal joints with care
F Hot water
from cold tap
F.1 Hot pipe work being
routed adjacent to
cold pipe work
F.2 Leaking seal in mixer
tap
F.1 Insulate hot pipe work or re-
route
F.2 Replace seals in mixer tap
G Metallic
noise from
system
G.1 Pipe work not
sufficiently supported
G.1 Add extra pipe work fixings
H Humming
noise from
system
during reheat
H.1 Air in system
H.2 Flow rate well in
excess of specification
H.1 Bleed system thoroughly
and re-pressurize
H.2 Reduce pump speed
10.4 Troubleshooting
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Notes
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Notes
Installat
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Dimplex a division of GDC Group Ltd
www.dimplex.co.uk
Millbrook House Grange Drive, Hedge End, Southampton SO30 2DF
Tel.: 0845 600 5111
e-mail: aftersales@dimplex.co.uk
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