GENERATING UP TO 70% OF YOUR HOT WATER REQUIREMENTS FOR FREE!

GENERATING UP TO 70% OF YOUR HOT WATER REQUIREMENTS FOR FREE!
GENERATING UP TO 70%
OF YOUR HOT WATER
REQUIREMENTS FOR FREE!
PRODUCTS AVAILABLE IN
THIS RANGE:
GRANT AURORA
SOLAR COLLECTORS
GRANT SAHARA
SOLAR COLLECTORS
GRANT SOLAR KITS
GRANT DUOWAVE SOLAR
CYLINDERS
GRANT COMPANY PROFILE
THE COMPANY
With an established history of over 30 years
designing, manufacturing and supplying a wide range
of highly efficient and reliable heating products,
Grant has become a firm favourite for many
householders and engineers, when choosing a new or
replacement heating system. From the award
winning Vortex range of oil-fired condensing boilers
to the latest Solar Thermal products, Grant has
focused on providing cost effective solutions to the
problem of rising energy costs.
TECHNOLOGY FOR THE FUTURE
The Company has achieved an enviable reputation
within the heating industry for its high-efficiency
approach to new concepts.
Grant is aware that although most domestic houses
will continue to be heated by gas, oil or electricity
well into the future, there is a growing awareness
that we all need to do more to reduce our
dependency on fossil fuels. With this in mind the
Company has, over recent years, been involved in the
development of a range of renewable heating
products, the first of which is The Grant Solar
Thermal Range.
TESTING AND APPROVALS
QUALITY DESIGN
Despite the sophisticated technology employed in
the development of new products, Grant's design
engineers have kept true to the original concept of
simplicity in installation and maintenance, which are
essential ingredients of today's heating systems.
Grant products are manufactured from the highest
quality materials and designed not just to meet, but
to exceed all relevant performance and
environmental standards. Backed by highly efficient
administration and Grant's comprehensive warranty
schemes, the Company is also focused on providing
an exceptional after-sales service for all of its
customers.
REST ASSURED
When you order from any of Grant's stockists you
can feel secure in the knowledge that you are
purchasing the best quality and most reliable
product from a long established
independent heating specialist. Our
policy has always been, and always will
be, total commitment to the
environment we live in and the
customers we serve.
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GRANT UK 0870 7775553
All components within the Grant Solar Range are
regularly tested under simulated real conditions to
ensure customers receive a product of the highest
quality and reliability. Grant Solar Collectors are
tested to several standards including exposure,
heavy rain, internal pressure, thermal performance
and ageing (as shown below).
Grant is also proud to have achieved the ‘Solar
Keymark’ approval for their collectors (‘The
Quality Label for Solar Thermal Products in
Europe’). This endorsement is a third party
certification mark, demonstrating to users and
consumers the compliance of products within
the requirements of relevant standards.
SOLAR THERMAL TECHNOLOGY
WHAT IS SOLAR THERMAL?
Solar Thermal is a clean and highly efficient means
of using renewable energy from the sun to provide
the hot water used in the home. The basic
principle is easy to understand. If you unroll a
garden hose on the ground and leave it exposed to
the radiant heat of the sun, in a short time the
water in the hose will become warm. Solar thermal
collectors work in very much the same way, only
more efficiently. Usually, but not exclusively, roofmounted solar collectors will be connected to one
of the coils of a twin-coil cylinder using a sealed
circuit containing a special glycol/water solution.
This fluid not only withstands the high
temperatures in excess of 200ºC on a summer
day, but also will not freeze in temperatures down
to –25ºC. The pump in the system circulates the
heated fluid from the panel to the cylinder where
the heat is transferred to the stored water
through the lower coil.
WHY INSTALL SOLAR THERMAL?
Solar thermal technology is the most reliable,
efficient and accessible form of renewable energy
available today and when combined with Grant's
high-efficiency Vortex Condensing Boiler, annual fuel
bills can be dramatically reduced. As solar water
heating depends on radiation, not direct sunlight,
it even works on dull days. Installing Grant Solar
collectors can help reduce heating bills by
providing up to 70% of a household's domestic hot
water requirements per annum. Solar thermal is
also great for the environment, as it has no
emissions and is assured for the next 4 billion
years.
DOESN'T SOLAR EQUIPMENT SPOIL
THE LOOK OF A HOUSE?
Grant have developed flatter and less obtrusive
panels, which are available in two colours - silver,
for a more contemporary look, and bronze which
blends with most roof types on domestic
dwellings. These two options ensure maximum
architectural design flexibility. There are various
mounting systems for the panels, so siting should
not present any problems.
CONTENTS
1
COMPANY PROFILE
2
SOLAR THERMAL TECHNOLOGY
3
GENERAL INFORMATION
4
TYPICAL SYSTEM DESIGN
5
SOLAR COLLECTOR DESIGN
6
GRANT SOLAR COLLECTORS
7
GRANT SOLAR KITS &
SYSTEM DESIGN
8
GRANT SOLAR KIT COMPONENTS
9
ROOF MOUNTING SYSTEMS
10 GRANT DUOWAVE SOLAR CYLINDERS
WHY CHOOSE GRANT SOLAR?
Installing a Grant Solar Thermal System has many
advantages for the homeowner. Apart from reducing
the amount of fossil fuels used, and the resultant
savings in annual fuel bills, the reduction in harmful
emissions will help minimise the long-term effects on
the Earth’s climate. For the installer, Grant Solar has
some unique installation features. The Solar Pump
Station incorporates an air eliminator that allows the
system to be both filled and purged of air in a single
operation. Unlike other arrangements there is no need
to install an air vent on the roof and also no need for
regular maintenance. The Grant Solar collectors are
the ‘Flat Plate’ type using 4mm thick ‘low Iron’ glass
and a copper collector panel which has a special
selective coating. This construction maximises solar
absorption whilst minimising reflection by up to 95%.
Grant Solar collectors can be installed on sloping
roofs using either an on-roof or in-roof mounting
system and also on flat roofs if
required. Grant Solar integrates
easily with conventional water heating
systems and will typically only take a
couple of days to install.
GRANT UK 0870 7775553
2
GENERAL INFORMATION
FREE ENERGY
SOLAR COVERAGE PER MONTH
Many people believe that solar panels only work in
the summer, however this type of free energy is
available throughout the year. From May to
September Grant Solar can produce 100% of
the energy required for heating your domestic
water (see right). Both the Grant Aurora and
Sahara collectors operate not just with direct
sunlight, but also diffused sunlight, so they even
work on cloudy days.
Sunny
Cloudy
Hazy
Overcast
1000 W/m2
600 W/m2
300 W/m2
100 W/m2
On average Grant Solar can provide up to 70%
of your hot water needs per year, for free!
SOLAR RADIATION IN THE UK/IRELAND
This graph shows the approximate available solar
yield in m2 per month for the UK.
ROOF INCLINATION AND DIRECTION
When choosing a system there are a number of
factors to consider. Almost any roof type is
suitable, however a south facing arrangement
could gain 100% of the light available during the
day. If the roof was to face South-East or SouthWest there will be a reduction in yield by 5-10%.
Collectors can be mounted with an inclination of
between 20° and 90°. As shown in the graph
below, optimal collector performance is achieved on
a south facing roof at an angle of 45°.
The diagram above shows the total average solar
radiation falling on 1m2 surface, inclined at 30° to
the horizontal, measured in kilowatt-hours.The
average property requires approximately 3,000
kWh per year for domestic water heating.
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GRANT UK 0870 7775553
TYPICAL SYSTEM DESIGN
PLEASE NOTE
This diagram is for information only
and should not be used for
installation purposes.
GRANT UK 0870 7775553
4
GRANT SOLAR COLLECTOR DESIGN
4mm low iron glass which maximises
absorption and minimises reflection by
up to 95%.
Durable weather resistant
self-cleaning glass.
Due to their design the collectors
are maintenance free.
Self-supporting collector cage
manufactured from non-corroding
aluminium.
Unique serpentine pipe
configuration ensuring
maximum heat transfer
and no air locks.
Homogeneous total copper
absorber with high selective
‘Sun-select’ coating.
35mm mineral wool thermal insulation
at the back of the absorber surface.
Vented aluminium
extruded frame, which
protects internal
components from
weathering.
PROVEN RELIABILITY
During the manufacturing process, the use of
premium materials guarantees the collectors’
reliability and durability. Independent assessments
verify that the panels and their components
conform to the most stern European quality
standards (DIN EN 12975).
The collectors’ most impressive features are their
ease of installation and long life span.
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GRANT UK 0870 7775553
GRANT SOLAR COLLECTORS
AURORA OVERVIEW
The Aurora Collector has a slender, extremely durable
aluminium frame with a high quality silver anodised
finish. This contemporary look is a stylish feature to
accentuate your property and looks great when
used on dark roofs like slate.
SAHARA OVERVIEW
The Sahara Collector also has a slender, extremely
durable aluminium frame, but with a tasteful bronze
finish. This blends with most roof types on domestic
dwellings, thus making for an
aesthetically pleasing solution.
COLLECTOR POSITIONING
Collectors can be positioned on the roof either in a
portrait or landscape arrangement, as shown
below. Up to 5 collectors can be used in series.
Portrait
Landscape
GRANT UK 0870 7775553
6
GRANT SOLAR KITS AND SYSTEM DESIGN
EASE OF ORDERING
DESIGNING YOUR SYSTEM
To make life as straight forward as possible, Grant
have introduced a series of individually numbered
kits that meet most installation requirements.
These simply consist of either Aurora or Sahara
collectors, a roof mounting system, expansion
vessel, pump station, control panel, pipe
connections and solar fluid - all of which can be
installed in approximately two or three days.
Grant Solar Collectors have a total area of 2.34m2.
As a rule of thumb, when sizing a system, you should
allow 1.0-1.3m2 of collector area, per person.
Cylinder requirements are 50-60 litres capacity per
m2 of collector area.To simplify this, for a 2-Collector
system of 4.68m2, you would require a cylinder of
approximately 200 litres. This would be sufficient for
4 people and satisfy up to 70% of your hot water
demand per annum.
Things to consider:
G
Location of building
G
Orientation of building
G
Angle of Inclination (roof)
G
% of Solar Contribution
G
Hot water requirements
G
Volume of system
G
Shade
G
Collector array in m2
G
Size of cylinder
G
Pipework requirements
HOW TO CALCULATE THE NUMBER OF COLLECTORS REQUIRED
DIRECTION OF ROOF SOLAR RADIATION (see map on Page 3)
kWh/Year
6
900 - 1000
2
2
2
3
1000 - 1100
2
2
2
2
1100 - 1200
2
2
2
2
900 - 1000
2
2
3
3
1000 - 1100
2
2
2
3
1100 - 1200
2
2
2
2
900 - 1000
2
3
3
4
1000 - 1100
2
2
3
3
1100 - 1200
2
2
2
3
900 - 1000
2
3
3
4
1000 - 1100
2
3
3
3
1100 - 1200
2
2
2
3
SOUTH
SOUTH WEST/
SOUTH EAST/
WEST
EAST
7
<3
NUMBER OF PEOPLE PER HOUSEHOLD
4
5
GRANT UK 0870 7775553
GRANT SOLAR KIT COMPONENTS
SOLAR CONTROLLERS
The Grant GSD1 and GSD2 Differential Solar Controllers
automatically manage the operation of the Solar Thermal
System. Monitoring the temperature in both collector
and cylinder, they operate the circulating pump only
when the difference in temperature will provide efficient
heating of the hot water. They will also stop the
circulating pump if the temperature in the collector
exceeds the maximum set or, if the cylinder has reached
the required temperature.
The Grant GSD1 controller is used where the collectors
are located on the same side of a roof - such as with a
South facing installation, whereas the Grant GSD2 is
used where the collectors are located on either side of
a roof - such as with an East/West facing installation.
Both solar controllers monitor and display the amount of
solar power produced by the system on a daily and
cumulative basis. Amongst other features the
controllers can display the collector and cylinder
temperatures and they also incorporate a pump kick
facility which activates the pump for a short period each
day to prevent the possibility of seizure if not operated
for more than 24 hours.
GSD1
GSD2
SOLAR PUMP STATION
The Grant Solar Pump Station houses the 3-speed
circulating pump, along with all other control
components, in an insulated expanded polypropylene
foam enclosure designed for wall mounting.
The flow and return ball valves incorporate temperature
gauges to monitor return and flow temperatures and
have integral anti-gravity brakes to prevent gravity
circulation around the circuit when the pump is stopped.
The air collector with manual bleed screw allows for
rapid air removal from the sealed system. The 6 bar
pressure relief valve is mounted on a manifold with the
system pressure gauge and expansion vessel
connection.
Filling and flushing of the system is made easy by the
combined fill and flush valve assembly and the
adjustment of fluid flow rate is simple using the integral
flow indicator.
EXPANSION VESSEL
The 18 litre expansion vessel, connected to the Solar
Pump Station by a flexible hose, incorporates a special
membrane selected to withstand the higher
temperatures found in solar thermal systems.
SOLAR FLUID
The Grant Solar Fluid is an odour-free, non-toxic 40/60
glycol/water solution, developed specifically for Solar
Thermal applications to protect systems from freezing.
The nitrate, phosphate and ammonia free fluid has been
formulated to remain stable over long periods of time
and is also a good corrosion inhibitor. It is available ready
mixed in 10 or 20 litre packs.
GRANT UK 0870 7775553
8
ROOF MOUNTING SYSTEMS
ON-ROOF
Grant Solar Collectors can be quickly and easily located above the
roof tiles or slates using brackets and a mounting rail attached
directly to the roof trusses. This system is available with fixing
brackets suitable for all roof tile types including slates, on roof
pitches ranging from 20º to 60º. The on-roof mounting system
is supplied as standard with any Grant Solar Kit.
IN-ROOF
Installation of Grant Solar Collectors set into the roof tiles
or slates ensures a low-profile appearance. The roof surface
beneath the collectors is closed within an aluminium
weathering cassette incorporating flashings, drainage
channels, etc. The collectors are installed on top of the
cassette using the same mounting rails supplied with the
on-roof system. In new build applications this mounting
option reduces roofing costs, as tiles are not required
beneath the collectors.
FLAT-ROOF
The flat-roof system is based upon the on-roof design. The
mounting rails are fitted to a rigid inclined frame structure.
This method allows the collectors to be positioned quickly
and easily on a flat roof.
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GRANT UK 0870 7775553
w
Ne
07
20
for
GRANT SOLAR CYLINDERS
SOLAR CYLINDER DESIGN
TECHNICAL INFORMATION
Grant DuoWave Unvented Twin-Coil Cylinders are suitable
for use with solar thermal installations and applications
where a secondary heat source is being utilised. All
models are manufactured from high quality, corrosion
resistant 316 stainless steel, ensuring a long life
expectancy. The internal coils are constructed from
22mm diameter stainless steel, giving high efficiency as
well as quick recovery. All cylinders are fully certified to
the latest test procedures (through WRAS) and are CE
marked. With the use of 40mm CFC free, fire retardant
polyurethane foam as insulation, heat loss is kept to a
minimum. Flow rates can be as much as 55 litres per
minute at 2.1 bar (depending upon the incoming flow
rate available). There are four sizes available: 200, 250,
300 and 400 litres.
All cylinders have a maximum working pressure of
6 bar, but have been pressure tested to 10 bar.
Two individual heating coils are incorporated, one
placed near the base and the other higher up. The
solar thermal system (or alternative heat source)
should be fitted to the lower coil and the primary
heat source (boiler) to the upper coil. A minimum
water supply of 20 litres per minute with a
dynamic pressure of 1 bar is required. All cylinders
can be used safely on open vented systems. A
minimum head of 1 metre must be maintained and
will have a similar flow performance as your
existing cylinder.
COMPONENTS SUPPLIED
Grant DuoWave Cylinders come complete with two
cylinder thermostats (which are adjustable between
45°C and 75°C) and overheat thermostat for each coil,
expansion vessel and flexi hose, 3kW low-level immersion
heater (complete with control and overheat
thermostats), tundish, non-return valve, pressure
reducing valve and strainer, temperature and pressure
relief valve (factory fitted) and cylinder drain cock.
GRANT DUOWAVE CYLINDER SPECIFICATIONS
DIMENSIONS
HEIGHT DIAMETER
(MM)
(MM)
APPROX. WEIGHT
EMPTY
FULL
(KG)
(KG)
GRANT
PRODUCT
CODE
CYLINDER
CAPACITY
(LITRES)
GDW200
200
1165
580
55
255
GDW250
250
1425
580
60
310
GDW300
300
1680
580
65
365
GDW400
400
2190
580
77
477
COIL RATING
UPPER
LOWER
(KW)
(KW)
GRANT UK 0870 7775553
10
TECHNICAL DATA
INSTALLATION
EASE OF COMMISSIONING
The installation of the Grant Solar System must be
carried out by a competent ‘trained’ person in
accordance with the relevant requirements for
safety, current Wiring Regulations, local Building
Regulations, Building Standards in Scotland,
Regulations and Bylaws of the local water Company
and Health and Safety document
No. 63S (Electricity at Work Regulations 1989).
Comprehensive technical information can be found
in the installation manual, which is supplied with
every solar product. Planning permission may be
required for some installations, please contact
your local planning office for details.
Cut your commissioning time from
hours to minutes with the Grant
Solar Filling Station. For further
details call: 0870 7775553
TRAINING ACADEMY
Grant's purpose-built Training Academy now
incorporates two air-conditioned lecture rooms,
product training workshop, external tuition area, solar
thermal installation area and refreshment facilities.
Grant Solar Product Courses are available at the
Academy in Devizes. The training covers all aspects of
the Grant Solar Range including designing and planning
a system, installation, operation and key features and
benefits of the product range.
GUARANTEES
All Grant Solar components are covered by a unique
5 year manufacturer’s guarantee, from the date of
purchase. Grant DuoWave cylinders are backed by a
full 2 year component guarantee as well as a 25 year
guarantee on the stainless steel cylinder shell, from
the date of purchase. All guarantees are subject to
being installed in accordance with the manufacturer’s
instructions. On completion of the installation, the
system should be commissioned and the guarantee
registration form returned to Grant UK.
AID AND SUBSIDIES*
There are Government-funded grants available for
solar thermal installations in the UK that are fitted by
registered engineers, via the DTI's Low Carbon Building
Programme. To apply visit: www.est.org.uk. In addition
the VAT rate applicable to solar thermal installations
in the UK is 5% instead of the normal 17.5%.
Sustainable Energy Ireland (SEI) offer grants for solar
thermal installations in Ireland to the value of €300
per m2 installed (to a maximum of 12m2). Applications
for the grants can be made online at: www.sei.ie. For
the latest information, please contact a member of
our sales team on the number below.
*Current at time of printing
SOLAR ACCESSORIES
AFTER SALES SERVICE
For peace of mind, all Grant Solar products are backed
by a national network of service engineers. In the
unlikely event of a problem occurring, your installer
should telephone our customer service department
on: 0870 7775553
(This is not a premium number, calls are charged at a national rate)
Grant supply a wide range of accessories to make
installation as easy as possible, including flashing kits
and fully insulated soft copper solar pipe, which is
available in lengths of 10, 15 and 25 metres. Full
faced internal insulation and high temperature
internal/external insulation can also be supplied.
Flashing Kit 1
Flashing Kit 2
Insulated Copper
Solar Pipe
SRB 02/07UK
This leaflet is accurate at the time of printing but as Grant has
a policy of continual improvement it may be superseded. We reserve
the right to amend specifications without prior notice. The statutory
rights of the consumer are not affected.
All products manufactured under I.S. EN ISO 9001.
®Grant Vortex, Grant Solar, Grant Aurora, Grant Sahara, Euroflame and
Multi Pass are registered trade marks of Grant Engineering Limited. The
contents of this leaflet are fully protected by copyright and nothing may
be reproduced without permission from Grant.
GRANT ENGINEERING (UK) LTD, HOPTON HOUSE, HOPTON INDUSTRIAL ESTATE
DEVIZES, WILTSHIRE SN10 2EU TELEPHONE 0870 7775553 FAX 0870 7775559
E-mail: [email protected] Website: www.grantuk.com
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