HP Installatio
n and User Instructions R03184 08/14
Page
1
Important - This Manual Must Remain with the User After Installation!
Slim Line Heat Pump Cylinders
With Integrated 40l Buffer
EC-Eau Cylinder Range
Installation and User Instructions
HP Cylinder
Installatio
n and User Instructions R03184
-4 09/15
Page
2
GDC Group 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, efficiency and performance.
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
provided to the customer for future reference.
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:
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
For further information on the HWA Charter Membership, please refer to the
HWA website www.hotwater.org.uk’
Contents
HP Cylinder
Installatio
n and User Instructions R03184
-4 09/15
Page
3
0 Overall View
Figure 1: Overall View of Heat Pump with Buffer Cylinder Installation Process
03
02
08
07
09
01
05
06
04
Contents
HP Cylinder
Installatio
n and User Instructions R03184
-4 09/15
Page
4
Contents
0 Overall View ................................................................................................3
1 Introduction .................................................................................................9
2 Scope of Delivery .........................................................................................9
3 Pre-Installation Advice ................................................................................ 11
3.1 Risk Assessment .................................................................................... 11
3.2 Siting Considerations .............................................................................. 11
3.3 Cold Water Supply ................................................................................. 12
3.4 Building Regulation G3 Discharge Requirements ........................................ 13
3.4.1 Discharge Pipe D2 .......................................................................... 14
3.4.2 Worked Example ............................................................................ 15
3.4.3 Termination of Discharge Pipe.......................................................... 16
3.5 Limitations ............................................................................................ 17
4 Installation ................................................................................................ 17
4.1 Cold Water Inlet with Inlet Control Group .................................................. 17
4.1.1 Correctly Site the Cylinder ............................................................... 17
4.1.2 Install the Inlet Group .................................................................... 17
4.1.3 Expansion Vessel ........................................................................... 17
4.1.4 Balanced Cold Water Supply ............................................................ 18
4.1.5 Drain Valve ................................................................................... 18
4.2 Hot Water Outlet .................................................................................... 18
4.2.1 Thermostatic Mixing Valve ............................................................... 18
4.2.2 Pipe Insulation ............................................................................... 18
4.3 Discharge Pipes from Safety Devices ........................................................ 18
4.3.1 Discharge Pipe D1 .......................................................................... 18
4.3.2 Discharge Pipe D2 .......................................................................... 19
4.3.3 Tundish ......................................................................................... 19
4.4 Immersion Heater .................................................................................. 20
4.5 Coil Flow Connections ............................................................................. 20
4.6 Coil Return Connections .......................................................................... 20
4.7 HP Flow to Buffer ................................................................................... 21
4.8 Buffer Flow to HP ................................................................................... 21
4.9 Cylinder Thermostat & Heat Pump Sensor Connections ............................... 21
4.9.1 Thermostat Connections.................................................................. 21
4.9.2 Sensor Installation ......................................................................... 23
4.10 Connection of Secondary Return ........................................................... 24
4.11 Water Module Wiring ........................................................................... 26
4.11.1 Primary Electrical Connections ......................................................... 26
4.11.2 Modbus Connection ........................................................................ 27
4.11.3 Zone Connections........................................................................... 28
4.11.4 Digital Inputs & Temperature Sensors ............................................... 30
4.12 Heat Pump and Buffer Cylinder Schematic .............................................. 31
4.13 Bivalent System .................................................................................. 32
5 Commissioning ........................................................................................... 32
Contents
HP Cylinder
Installatio
n and User Instructions R03184
-4 09/15
Page
5
6 Maintenance .............................................................................................. 33
7 Spare Parts ................................................................................................ 35
8 Technical Data ........................................................................................... 36
8.1 Cylinder Heat Exchanger Pressure Drop .................................................... 39
8.2 Cylinder Attainable Temperature .............................................................. 39
9 User Instructions ........................................................................................ 40
9.1 General................................................................................................. 40
9.2 Operation .............................................................................................. 40
9.2.1 Water Temperature Direct Electric Heating ........................................ 41
9.2.2 Non A Class Heat Pump Water Temperature ...................................... 42
9.3 Maintenance .......................................................................................... 42
9.4 Troubleshooting ..................................................................................... 43
10 A Class Cylinder Wiring Overall View ............................................................. 44
HP Cylinder
Installatio
n and User Instructions R03184
-4 09/15
Page
6
Important Information
Precaution: “This appliance can be used by children aged
from 8 years and above and persons with reduced physical
sensory or mental capabilities or lack of experience and
knowledge if they have been given supervision or
instruction concerning use of the appliance in a safe way
and understanding the hazards involved. Children shall
not play with the appliance. Cleaning and user
maintenance shall not be made by children without
supervision.”
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!
It is important to
check the pre-charge
pressure of the
expansion vessel
membrane before
filling the cylinder.
This has been factory
set to 3 bar. The pre-
charge should be
greater than or equal
to 3 bar.
It is important that the
tundish is positioned
away from any
electrical components.
Note: Means for
electrical
disconnection must be
incorporated in the
fixed wiring in
accordance with the
wiring rules.
Before removing the
cover from the
immersion heater
isolate appliance using
isolating switch!
Danger of electrical
shock! Only use
suitable electrically
insulated equipment
HP Cylinder
Installatio
n and User Instructions R03184
-4 09/15
Page
7
Important Information
when working inside
immersion housing.
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.
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!
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.
Temperature setting: A
high level cutout is
fitted to the product for
each heat source. This
should never activate
under normal
operation. The
maximum possible
cylinder temperature
attainable by the heat
pump is 65°C as set on
the User Interface. The
back-up immersion
heater can produce up
to 72°C at its maximum
setting, i.e 5. For
HP Cylinder
Installatio
n and User Instructions R03184
-4 09/15
Page
8
Important Information
convenience the
immersion heater is
preset to produce
60°C.
If an electronic copy of
this manual should be
required, please contact
the manufacturer at the
address at the back of this
manual.
Note: This appliance is
intended to be
permanently
connected to the water
mains and not
connected by a hose-
set.
HP Cylinder
Installatio
n and User Instructions R03184
-4 09/15
Page
9
Scope of Delivery
1 Introduction
Thank you for choosing a Dimplex
product. The EC-Eau heat pump
cylinders are specified with large, high
surface area heat exchangers,
specifically sized to match the
requirements of Dimplex heat pumps.
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.
2 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.
Scope of Delivery
HP Cylinder
Installatio
n and User Instructions R03184
-4 09/15
Page
10
Table 1: Scope of Delivery for Heat Pump with Buffer and A Class Heat Pump with Buffer
Cylinders
* These items are supplied factory fitted
*** Supplied with Dimplex heat pump hydraulic pack
Pre-Installation
HP Cylinder
Installatio
n and User Instructions R03184
-4 09/15
Page
11
3 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.
3.1 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.
3.2 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
Pre-Installation
HP Cylinder
Installatio
n and User Instructions R03184
-4 09/15
Page
12
- frost protection
The heat pump cylinder range is
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.
3.3 Cold Water Supply
For satisfactory and safe performance
of the unvented cylinder the water
supply must meet the following
criteria:
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
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.
Pre-Installation
HP Cylinder
Installatio
n and User Instructions R03184
-4 09/15
Page
13
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 de-
scaling. 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.
3.4 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.
Pre-Installation
HP Cylinder
Installatio
n and User Instructions R03184
-4 09/15
Page
14
3.4.1 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 2, Table 2 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 2: Typical Discharge Pipe Arrangement
Pre-Installation
HP Cylinder
Installatio
n and User Instructions R03184
-4 09/15
Page
15
Table 2: Sizing of Copper Discharge Pipe “D2” for Common Temperature Relief Valve Outlet Sizes
3.4.2 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 2, 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.
Pre-Installation
HP Cylinder
Installatio
n and User Instructions R03184
-4 09/15
Page
16
- 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 cross-
linked polyethylene (PE-X)
complying with national
standards.
- be continuously marked with a
warning that no sanitary
appliances should be connected to
the pipe.
3.4.3 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.
Installation
HP Cylinder
Installatio
n and User Instructions R03184
-4 09/15
Page
17
3.5 Limitations
- The heat pump must be specified
correctly, to ensure it is compatible
with the model of cylinder installed.
This is to prevent the heat pump
malfunctioning when preparing
domestic hot water.
- The heat exchangers in this range of
cylinders have been specifically
designed for heat pump applications.
Great care must be taken if using
these cylinders with other heat
sources, due to the heat exchange
capacity of the product.
4 Installation
4.1 Cold Water Inlet with
Inlet Control Group
4.1.1 Correctly Site the
Cylinder
Install the cylinder in an appropriate
location, ensuring all of the
recommendations have been
considered (see chapter 3.2).
4.1.2 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!
4.1.3 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 should 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 3: 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. This
has been factory set to 3 bar.
The pre-charge should be
greater than or equal to 3bar.
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 4.
Installation
HP Cylinder
Installatio
n and User Instructions R03184
-4 09/15
Page
18
Figure 4: Detail Showing the Connection of
the Expansion Vessel to the Inlet Group
4.1.4 Balanced Cold Water
Supply
If balanced cold water supply is
required a connection can be taken
from the bottom of the inlet group.
4.1.5 Drain Valve
It is important to install a drain valve
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.
4.2 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.
4.2.1 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).
4.2.2 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.
4.3 Discharge Pipes from
Safety Devices
4.3.1 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.
Expansion
Vessel
Connection
Balanced
Cold Water
Supply
Expansion
Relief
Valve
Cold
Water to
Cylinder
Cold
Water
from
Mains
Installation
HP Cylinder
Installatio
n and User Instructions R03184
-4 09/15
Page
19
- Where a manifold is used it should be
sized to accept and discharge the
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).
4.3.2 Discharge Pipe D2
For a detailed description of the
discharge pipework D2 see chapter
3.4.1.
4.3.3 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 2).
- 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 5: Wiring Diagram for Immersion Heater
Installation
HP Cylinder
Installatio
n and User Instructions R03184
-4 09/15
Page
20
4.4 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 5. 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.
The immersion heater typically cannot
be directly switched by the heat pump
controller, but instead requires a relay.
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.
A torque of 40 Nm is recommended
when tightening up the immersion
after it has been removed and refitted.
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.
4.5 Coil Flow Connections
Equally, if the return connection is the
lowest point in the heat pump loop, a
suitable drain device should be
installed. For location of connections
see Figure 1.
It is recommended that the fittings
used to connect to the cylinder are
suitable for stainless steel, the flow and
return should use 28mm 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 over-
tightened.
4.6 Coil Return Connections
If the flow connection is the highest
point in the heat pump loop and if the
system was not commissioned using a
flush and fill pump, an adequate device
for de-aeration must be installed.
Note: Special care is required
when fitting the 3 port valve to
ensure “A” goes to the DHW coil
and that “B” goes to the buffer.
This is different to the normal
convention that may be used.
Installation
HP Cylinder
Installatio
n and User Instructions R03184
-4 09/15
Page
21
Figure 6: Diagram Showing Positions of
Valve
4.7 HP Flow to Buffer
The cylinder buffer flow connection
must be connected to a three port
valve which diverts flow between the
buffer cylinder and DHW cylinder
heating coil.
4.8 Buffer Flow to HP
The cylinder buffer flow to HP
connection must be connected in series
with the heat emitter system/under
floor heating.
4.9 Cylinder Thermostat &
Heat Pump Sensor
Connections
To conform to building regulations, it is
imperative that the heating water
circulating pump(s) be installed
through the cylinder twin
thermostat(s) – applicable to non A
Class cylinder only.
Also, a two port valve(s) has to be
wired after the thermostat, ensuring
compliance with building regulations.
This is applicable to each heat source
entering the water cylinder.
Should a Dimplex Heat Pump be
installed with the cylinder, it is
sufficient to use the temperature
sensor to control the heat input to the
cylinder and ignore Section 5.9.1.
4.9.1 Thermostat
Connections
For A Class cylinder and heat pump
cylinders this connection is prewired.
Where a non A Class cylinder is used
the cylinder thermostat must be wired.
After the sensor and cylinder
thermostat are connected, the
thermostat temperature setting can be
adjusted such that the sensor takes
primary control of the system, i.e. set
the cylinder thermostat to maximum
setting but allow the sensor to control
desired temperature levels.
To access the thermostat connections,
the cover panel should be removed
from the cylinder. To do this, simply
remove the fixing screws from the side
of the cylinder cover panel top and
bottom where highlighted in
.
Legend:-
A = HP Flow
B = HP Flow to Buffer
Installation
HP Cylinder
Installatio
n and User Instructions R03184
-4 09/15
Page
22
Figure 7: Cylinder Cover Panel Removal
Beneath the cylinder cover panel the
pre wired dual cut out thermostat
assembly can be accessed.
To wire into the thermostat a three
core cable or equivalent is required to
be fitted to the terminal block as shown
in Figure 8.
Figure 8: Cylinder Thermostat Layout
The live supply to the thermostat must
be connected to the terminal block
according to the schematic in Error!
Not a valid bookmark self-
reference..
Figure 9: Thermostat Wiring Schematic
T1
T2
T2
T3
NOTE: T1 and T2 must be connected. T3 can replace T2 only when
a normally open configuration is required.
To circ pump or two port valve
Supply from control unit
Temp
control
stat
High
temp cut
out stat
2
1
1
2
3
T4
Earth
Installation
HP Cylinder
Installatio
n and User Instructions R03184
-4 09/15
Page
23
4.9.2 Sensor Installation
To access the DHW sensor mounting
bracket, the dual thermostat assembly
must be removed from the cylinder as
shown in Figure 10. Two mounting
screws must be removed before
obtaining access.
Figure 10: Sensor Bracket Access
Next remove the insulation foam (A) to
access the sensor mounting plate (B)
and remove the M5 fixing screws in the
four corners of the plate.
If an additional sensor is required,
simply insert it into the adjacent sensor
holder.
Figure 11: Sensor Bracket Removal
Orientate the sensor mounting plate to
allow access to the phials (four clips in
the centre of the sensor mounting
plate).
Be careful not to kink the capillaries
that connect the thermostat bulbs. The
sensor mounting plate will have two
vacant slots for additional sensors.
Slide the sensor into place as shown in
Figure 12.
Figure 12: Fitting the Sensor
To replace the sensor mounting plate
in position, simply refit the four fixing
screws and secure the plate against the
cylinder bracket.
It is important to take care that none
of the cables become damaged during
this step and that good contact is made
between the cylinder wall and the
sensor(s).
A
B
Installation
HP Cylinder
Installatio
n and User Instructions R03184
-4 09/15
Page
24
4.10 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 13).
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 13: Secondary Return Loop
From Taps
HW Outlet
To Taps
Swept-T
Installation
HP Cylinder
Installatio
n and User Instructions R03184
-4 09/15
Page
25
Figure 14: Wiring Configuration of Space Heating and Hot Water Dimplex "A Class" Cylinder
Installation
HP Cylinder
Installatio
n and User Instructions R03184
-4 09/15
Page
26
4.11 Water Module Wiring
All wiring must be carried out by a
suitably qualified person and must be
fully compliant with the current release
of Building & Wiring Regulations. For
general wiring configuration see Figure
14.
The water module has been pre-wired
to ensure minimal additional work is
required by the installer. The following
summarises the required electrical
connections which the installer must
make:
Primary connections, 4.11.1. A
three core cable must be
connected between the supply
isolator and the cylinder
connector block. See Figure 15.
Modbus connection, 4.11.2. The
communication cable between
the cylinder and heat pump must
be installed. See Figure 16.
Zone connections 4.11.3. The
circulation pump(s) and valve(s)
should be wired as illustrated in
Figure 17.
Temperature sensors and digital
inputs can be connected to the
PCB, 4.11.4 (DI 01-05), (NTC-
DHW and NTC-Zone 1-4). See
Figure 18.
4.11.1 Primary Electrical
Connections
In both retro fit and new build
installations, a 3 core cable must be
taken from the isolator [minimum of a
16Amp double pole fused spur] and
connected to the primary connector
block as illustrated in Figure 15.
Live connection taken from a
fused spur to the cylinder
connector block, [LHS grey
terminal].
Neutral and Earth wires must be
connected to the blue and
green/yellow connectors
respectively, as per Figure 15.
Installation
HP Cylinder
Installatio
n and User Instructions R03184
-4 09/15
Page
27
Figure 15: Primary Electrical Connections, Live, Neutral & Earth
4.11.2 Modbus Connection
Correct installation of the Modbus
connections is critical for communication
between the heat pump, UI and the
cylinder. Figure 16 illustrates how these
connections must be made. The modbus
wire must be specified to BELDEN 9842.
The maximum allowable network length is
100m.
Modbus in connection comes from
the heat pump master controller.
Modbus out connection goes to the
user interface.
The earth shield of the Modbus
connection must be connected to
ground at both ends. The Earth
connector block or the cylinder stat
bracket can be used as a ground
connection.
The Modbus cables can be fed inside
the low voltage trunking (LHR) under
the metal hood and clamped to the
strain relief bar, using the supplied
cable ties.
Note: The earth shield in the cable
from the heat pump to the cylinder is
only terminated at the cylinder.
Installation
HP Cylinder
Installatio
n and User Instructions R03184
-4 09/15
Page
28
Figure 16: Modbus Communication Connection
4.11.3 Zone Connections
For a dual zone system, i.e. DHW and
CH, a pump and a three port valve is
required; these are included in the
scope of delivery of the heat pump
hydraulic pack.
Where additional zones are required,
the installer must specify and source
suitable components.
Figure 17 illustrates wiring of each
pump and/or zone valve for up to 4
zones.
Note: The water module PCB is
only capable of switching valves
and under no circumstances
should ERP pumps be switched, as
irreparable damage will be caused
that will void the warranty.
Note: The circulatory pump speed
control [two core cable]
connections must NOT be
connected in any way.
Installation
HP Cylinder
Installatio
n and User Instructions R03184
-4 09/15
Page
29
Figure 17: Zone Connection
Note: When using a circulation pump to create
heating zones, ensure a suitably sized relay is
used between the PCB and circulating pump.
Installation
HP Cylinder
Installatio
n and User Instructions R03184
-4 09/15
Page
30
4.11.4 Digital Inputs &
Temperature Sensors
The water module contains 5 optional
digital inputs, 4 optional NTC zone
temperature sensor inputs and 1 domestic
hot water (DHW) NTC sensor.
DHW NTC is pre-wired and fitted to
the cylinder. This sensor allows the
user interface to display the actual
cylinder temperature.
NTC zone sensors allow the user
interface to display room temperature
in up to 4 different zones and actuate
the corresponding controls
accordingly.
Note: The DI’s are volt free and
under no circumstances should
240V be connected to these, as
irreparable damage would result
and void the warranty.
Figure 18: Digital Inputs & Temperature Sensors
Installation
HP Cylinder
Installatio
n and User Instructions R03184
-4 09/15
Page
31
4.12 Heat Pump and Buffer Cylinder Schematic
Figure 19 illustrates a typical two zone heating system with cylinder and one primary
heating zone.
Where additional information is required for larger zoned systems, please refer to the
heat pump installation guidelines for further details.
Figure 19: Heat Pump and Buffer Cylinder Schematic
HP Cylinder
Installatio
n and User Instructions R03184
-4 09/15
Page
32
Commissioning
4.13 Bivalent System
Bivalent system operation can be achieved
by disconnecting the buffer cylinder live
connection and connecting the backup
heat source.
5 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 and not for the
heat pump 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) Follow the instructions for
commissioning the heat pump as per
heat pump installation manual.
12) Adjust timer programmer and cylinder
thermostat settings in accordance
with client requirements.
13) Instruct user in the operation of the
unit and hand over this manual
advising the owner of annual service
requirements.
14) Complete the technical data label on
the cylinder with legible and
permanent writing.
15) Only after commissioning the DHW
cylinder can the buffer be filled. This
procedure must be carried out in line
with the heat pump commissioning
guidelines.
Maintenance
HP Cylinder
Installatio
n and User Instructions R03184
-4 09/15
Page
33
6 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.
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!
1) Draw some water from cold water
tap and retain in container.
2) Isolate cold water mains supply
from cylinder.
3) Briefly open temperature and
pressure relief valve, assure safe
discharge and check that valve is
not dripping when closed.
4) Briefly open expansion relief
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.
5) Open hot water tap and release
remaining pressure from unit.
6) If the system is drained
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. Re-
assemble 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 O-
ring seal for damage and replace if
necessary. A torque of 40 Nm is
recommended when tightening up
the immersion after it has been
removed and refitted.
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
5).
Note: Air vent located on top of
buffer vessel; to access remove
end cap.
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.
Maintenance
HP Cylinder
Installatio
n and User Instructions R03184
-4 09/15
Page
34
If replacement parts are required,
please see Figure 20 for part
descriptions and part numbers.
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.
HP Cylinder
Installatio
n and User Instructions R03184
-4 09/15
Page
35
Spare Parts
7 Spare Parts
Figure 20: Replacement Part Numbers for Slim Line Heat Pump Range of Cylinders
HP Cylinder
Installatio
n and User Instructions R03184
-4 09/15
Page
36
Technical Data
8 Technical Data and Product Fiche
Figure 21: Heat Pump Buffer Cylinder and Cross-Section (For Reference Only)
HP Cylinder
Installatio
n and User Instructions R03184
-4 09/15
Page
37
Technical Data
Heat Pump Buffer Cylinder Range – Product Fiche
Reference
180HP40
180HP40A
Weight [kg]
60
60
Reheat time [mins]*
14
14
Average draw off temperature [°C]*
60
60
Hot water draw off capacity (l)* /
draw off flow rate (l/s)
178
178
0.42
0.42
Heat loss [kWh/24h]*
1.68
1.68
Height [mm]
2060
2060
Outer Diameter [mm]
480
480
HW Outlet [mm]
1800
1800
T&P Valve [mm]
1800
1800
Secondary Return [mm]
-
-
CW Inlet [mm]
440
440
HP Buffer Flow/HP Flow to Buffer [mm]
180
180
HP Buffer Flow/Buffer Flow to HP [mm]
312
312
HP Return/DHW Return [mm]
440
440
HP Flow/DHW Flow [mm]
960
960
Table 3: Heat Pump Buffer Cylinder Dimensions
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 0.42l/s flow rate
GDC Group Ltd
Heat Pump Buffer Cylinder Range – Product Fiche
Reference
ECS180HP40-480
ECS180HP40A-480
Energy Rating
B
B
Standing Loss [W]
56
56
Storage Volume [L]
170
180
Table 4: Heat Pump Buffer Product Fiche
Technical Data
HP Cylinder
Installatio
n and User Instructions R03184
-4 09/15
Page
38
Heat Pump Buffer Cylinder Range
Reference
180HP40 180HP40A
Actual capacity [L]
180 180
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
28mm stainless steel
Coil specification
- heat pump coil surface area [m²]
2.2
8
3.0
3.0
3.2
- HX performance heat pump coil [kW]
39
51
43
47
47
43
- max. working pres. [Bar]
3
Immersion heater
1 ¾ F BSP 3kW @ 240 V
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
½” 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:- 1309706
KIWA
KIWA
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 5: Heat Pump Buffer Product Features
# Not including insulation
Technical Data
HP Cylinder
Installatio
n and User Instructions R03184
-4 09/15
Page
39
8.1 Cylinder Heat Exchanger Pressure Drop
Figure 22: Heat Exchanger Pressure Drop 2.2m
8.2 Cylinder Attainable
Temperature
The heat pump heating system must
be commissioned by a trained installer.
Ensuring correct installation of the
system will allow a water temperature
of 60°C to be obtained inside the
cylinder during DHW preparation.
This is true for all cases when ambient
conditions are between -2°C and
+25°C. For other operating conditions,
i.e. -2°C < ambient > 25°C, cylinder
temperatures of approximately 55°C
can be expected.
The Slim Line A Class heat pump will
be able to achieve 60°C without
immersion back up in all of the A Class
cylinders, so long as the flow rate
specified in the instructions is met, the
pipes are insulated and the pipe runs
from the heat pump to the cylinder and
back are less than 15m.
0
2000
4000
6000
8000
10000
12000
14000
0.0 0.5 1.0 1.5 2.0 2.5
Pressure Drop (Pa)
Flow Rate (m
3
/h)
2.2 m
2
Coil Pressure Drop
User Instructions
HP Cylinder
Installatio
n and User Instructions R03184
-4 09/15
Page
40
9 User Instructions
9.1 General
“This appliance can be used by children aged from 8 years
and above and persons with reduced physical sensory or
mental capabilities or lack of experience and knowledge if
they have been given supervision or instruction
concerning use of the appliance in a safe way and
understanding the hazards involved. Children shall not
play with the appliance. Cleaning and user maintenance
shall not be made by children without supervision.”
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.
9.2 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 by changing
the settings on the heat pump user
interface.
For operation with a generic non A
Class heat pump it is recommended to
set the hot water temperature to
between 45°C and 55°C. Higher
temperatures introduce more heat loss
from the unit and increase the risk of
scalding significantly.
HP Cylinder
Installatio
n and User Instructions R03184
-4 09/15
Page
41
Operation
When using the A Class cylinder and
heat pump, the DHW temperature is
set using the heat pump user interface
and can be adjusted up to 65°C to
meet user requirements however the
lower the set temperature the more
energy efficient the system will
become.
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.
9.2.1 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 23.
Figure 23: Adjustment Water Temperature Direct Electric Heating Element
Dial to adjust water
temperature
HP Cylinder
Installatio
n and User Instructions R03184
-4 09/15
Page
42
Operation
9.2.2 Non A Class Heat Pump
Water Temperature
The water temperature achieved by the
heat pump heating system depends
either the user interface setting or on
the setting of the thermostat.
When the cylinder is controlled using
the heat pump sensor [A Class heat
pump] this section is not applicable.
The adjustment at the cylinder is
carried out on the twin thermostat
fitted to the cylinder as shown in Figure
24. 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.
If the domestic hot water temperature
is controlled by a sensor connected to
the heat pump control unit, the
thermostat on the cylinder should be
turned to maximum to avoid any
conflicting control signals.
Figure 24: Adjustment Water Temperature Auxiliary Source
9.3 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 6.
Dial to adjust
water temperature
Manual re-set
HP Cylinder
Installatio
n and User Instructions R03184
-4 09/15
Page
43
Troubleshooting
9.4 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 Auxiliary heating
malfunction
B.3 Direct heating mal function
B.4 Auxiliary/direct heating high
limit thermostat has tripped
B.1 Set timer/programmer
correctly
B.2 Consult auxiliary 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 re-
heat
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
Wiring
HP Cylinder
Installatio
n and User Instructions R03184
-4 09/15
Page
44
10 A Class Cylinder Wiring Overall View
Figure 25: Slim Line A Class Cylinder Wiring Overall View
Wiring
HP Cylinder
Installatio
n and User Instructions R03184
-4 09/15
Page
45
Figure 26: Slim Line A Class Cylinder Installer Wiring Overall View
HP Cylinder
Installatio
n and User Instructions R03184
-4 09/15
Page
46
Notes
HP Cylinder
Installatio
n and User Instructions R03184
-4 09/15
Page
47
Notes
HP Installatio
n and User Instructions R03184 08/14
Page
48
Dimplex a division of GDC Group Ltd
Millbrook House Grange Drive, Hedge End, Southampton SO30 2DF
Tel.: 0845 600 5111
e-mail: [email protected]
www.dimplex.co.uk
