DUALSUN solar heating system Quick start guide
Installation, use, maintenance
manual - DualSun solar heating
system for individual swimming
pools
v3.6
2020
English
Table of Contents
1. Introduction .................................................................................................................................. 3
1.1. General safety instructions .................................................................................................. 3
1.2. General standards to be observed ....................................................................................... 3
1.2.1. Photovoltaic solar standards .................................................................................... 3
1.2.2. Solar thermal standards ........................................................................................... 4
1.3. Important points before starting the installation ..................................................................... 4
1.3.1. Pipes and fittings ..................................................................................................... 4
1.3.2. PVC stripper and glue .............................................................................................. 5
1.3.3. Various ................................................................................................................... 5
1.3.4. Tools ....................................................................................................................... 5
2. The DualSun SPRING hybrid panel ................................................................................................ 6
2.1. Technical characteristics of the DualSun SPRING panel ....................................................... 7
2.2. Recommended hydraulic flow rates for the DualSun SPRING panel ...................................... 7
2.3. Maximum allowable pressures for the DualSun SPRING panel ............................................. 8
3. Installation of the DualSun solar heating system for individual swimming pools ................................. 9
3.1. Operating principle and limits ............................................................................................ 10
3.2. Constitution of the DualSun solar pool heating kit ................................................................ 11
3.3. Constitution of the DualSun solar pool drain kit ................................................................... 12
3.4. Installation of the DualSun SPRING hybrid panel ............................................................... 12
3.4.1. Hydraulic layout with the DualSun SPRING hybrid panel .......................................... 12
3.5. Selection of transfer pipes for DualSun solar swimming pool heating system ........................ 12
3.6. Operation of the filtration pump and verification of its characteristics .................................... 13
3.7. Installation of the DualSun BS/2 solar controller ................................................................. 14
3.7.1. General ................................................................................................................ 14
3.7.2. Overview of the DualSun BS/2 solar control system ................................................. 14
3.7.3. Technical characteristics of the DualSun BS/2 solar control unit ................................ 15
3.7.4. Fixing of the DualSun BS/2 control unit ................................................................... 15
3.7.5. Electrical connections of the DualSun BS/2 solar control unit .................................... 16
3.7.6. DualSun BS/2 control buttons ................................................................................. 19
3.8. Installation of the motorized 3-way valve ............................................................................ 19
3.8.1. Technical data of the motorized 3-way valve ............................................................ 20
3.8.2. Hydraulic connection of the motorized 3-way valve .................................................. 20
3.8.3. Electrical connection of the motorized 3-way valve .................................................. 22
4. Commissioning of the DualSun individual swimming pool heating system ....................................... 23
5. Shutdown of the DualSun individual solar pool heating system ....................................................... 26
6. Guarantees ................................................................................................................................ 27
6.1. Commissioning report ....................................................................................................... 27
7. General recommendations ........................................................................................................... 28
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1. Introduction
1.1. General safety instructions
Please read this installation manual thoroughly and in detail in order to be able to fully exploit the functionality
of the product. DualSun disclaims all liability for defetcs and damages that would result from non-compliance
with the installation instructions (improper use, incorrect installation, handling error, etc.).
IMPORTANT
• It is important to follow these instructions for personal safety. Improper mounting may cause
serious injury. The end user must keep these safety instructions.
• The installation, control, commissioning, maintenance and repair of the installation must only
be carried out by qualified personnel.
• The correct functioning of the installation is only guaranteed if the installation and assembly
have been carried out in accordance with the rules of the art.
CAUTION
• The entire solar installation must be installed and operated in accordance with recognized
technical rules.
• All electrical work must be done according to local guidelines.
• The installation must not be used if it shows signs of damage.
DANGER
• For installations on roofs, it is necessary to comply with personal safety standards, relating
to roofing and waterproofing work and relating to scaffolding work with safety net by mount-
ing the respective devices before starting work . Refer to the recommendation published by
the national risk prevention organization.
• Gloves are compulsory when handling the panels to avoid any risk of injury or burns.
• Disconnect all connection cables from the power supply before working on the installation.
1.2. General standards to be observed
To ensure safe, ecological and economical operation, all applicable regional and national standards, rules and
directives must be observed, particularly the international standards mentioned below:
1.2.1. Photovoltaic solar standards
• CEI / EN 61215 1 and 2 edition 1: Design qualification and approval of crystalline silicon photovoltaic (PV)
modules for terrestrial application.
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• CEI / EN 61730 1 and 2 edition 2: Qualification for dependability of photovoltaic (PV) modules - part 1: Re-
quirements for construction and part 2: requirements for tests.
1.2.2. Solar thermal standards
• EN 12975 1 and 2: General requirements and control method for solar thermal collectors.
• EN 12976 1 and 2: General requirements and process for testing prefabricated solar thermal installations.
The installation instructions and safety instructions must be met.
Observe the regulations on the prevention of industrial accidents prescribed by professional associations, in
particular those relating to work carried out on the roof.
1.3. Important points before starting the installation
1. Precautions for use when working on a roof or near a swimming pool:
• Be careful with electric wires,
• Secure the ladder to prevent it from slipping or falling,
• Do not leave extension cords lying around in the pool or in the water,
• Wear non-slip shoes to avoid slipping on the ladder or sloping roof,
• Cut-off the power supply to the pool when installing the solar control system.
2. Technical considerations:
• First of all, you have to decide on the location of the system and draw a diagram of the site. Specify on
this diagram the inlet and outlet of the filtration circuit.
• Size the installation using the online simulator MyDualSun.
• Make sure that the locations provided for the solar collectors allow them to drain properly when the sys-
tem is off.
• Check the power - manometric head of the filtration pump corresponding to the circulation flow rate in the
solar panels, see useful documents referenced below.
• Check the orientation of the motorized 3-way valve and the location of the bypass pipe.
To ensure trouble-free installation, do not skip any steps.
Useful documents downloadable from DualSun online library:
•Notice d'installation, utilisation, maintenance DualSun SPRING
•Notice d'installation, utilisation, maintenance - Ssystème de chauffage solaire DualSun pour piscine individu-
elle - Annexe dimensionnement pompe de filtration
1.3.1. Pipes and fittings
Use PVC pressure pipes and fittings with anti-UV treatment and Ø 40 outside or Ø 50 outside section. DO NOT
USE ABS PIPES: they are rarely UV treated like PVC pipes and do not last as long. For aesthetic reasons, it is
possible to paint the PVC pipes: then take a good quality paint, anti UV if possible.
It is very important to use pipe sections adapted to the number of panels to be irrigated, an undersizing leading
to poor irrigation of the solar panels. As a general rule, the connection is made with PVC with an external Ø of
at least 40mm.
Check the correct diameter of the hydraulic lines in chapter Selection of transfer pipes for DualSun solar swim-
ming pool heating system [12] in the Notice d'installation, utilisation, maintenance DualSun SPRING.
In order to reduce thermal losses, the length of the pipe (return in particular) must be reduced as much as pos-
sible.
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1.3.2. PVC stripper and glue
It is important to strip and glue each PVC element well. Comply with the manufacturers' recommendations for
use.
Immediately after stripping each part, first glue the fitting thoroughly, then the end of the pipe. Fit the end of this
pipe into the fitting by turning slightly so that the glue is evenly distributed and until each element is properly in
place.
Hold the assembly for 5 or 10 seconds to allow a good grip.
Finally, remove excess glue from the gasket and the pipe.
1.3.3. Various
Depending on your plans, you will need other connection elements and materials such as PVC valves, stain-
less steel screws, silicone sealant, etc.
Make sure these are quality products that will withstand direct exposure to the sun over time.
1.3.4. Tools
Your installation will be easier if you have well prepared your plans and if you have the necessary tools and
materials for your work.
The tools you will need are as follows:
• flat and cruciform screwdriver,
• electric drill with drill bits and plugs,
• metal saw,
• sanding paper,
• PVC stripper,
• glue gun,
• water pump pliers,
• ladder.
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2. The DualSun SPRING hybrid panel
DualSun SPRING is a new generation hybrid solar panel that provides both electricity (photovoltaic) and hot
water (thermal) for homes.
Protected by several patents, the SPRING panel produces 2.5 times more energy than a photovoltaic panel of
the same surface. This innovative technology saves space and total integration on the roof, at a competitive
energy cost.
Our technology is the result of a double observation on photovoltaic panels:
• They produce much more heat (80%) than electricity (20%) when exposed to the sun,
• Their yield decreases when their temperature increases.
The SPRING panel thus absorbs solar energy to restore it in the form of two energies useful for the operation of
buildings:
• Electricity through photovoltaic cells,
• Heat via a heat exchanger, completely integrated into the panel. This heat is captured at the DualSun
SPRING panel exchanger by a heat transfer fluid. The latter transports the heat to the heat transfer device,
which restores the calories of the heat transfer fluid to thermal storage or directly to the tank to be heated.
Thanks to a vertically integrated design of the photovoltaic and thermal components in a single panel (protected
by 3 families of patents), the SPRING panel is specifically designed for optimized industrial manufacturing,
making it more efficient, more aesthetic and cheaper than competitors.
Having the same shape as a conventional photovoltaic panel, the SPRING offers:
• A harmonious design and total integration into the roof,
• A real space saving thanks to a more efficient solar panel per m²,
• Simple and safe installation.
1. Photovoltaic solar cells : monocrystalline, high efficiency, they are cooled by the circulation of water
2. Heat exchanger : fully integrated into the panel, it allows excellent heat transfer between the photovoltaic
front panel and the circulation of water.
For more details on the DualSun SPRING panel, you can consult the following chapters of the Notice d'installa-
tion, utilisation, maintenance DualSun SPRING:
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•Technical characteristics of the DualSun SPRING panel [7]
•Recommended hydraulic flow rates for the DualSun SPRING panel [7]
•Maximum allowable pressures for the DualSun SPRING panel [8]
2.1. Technical characteristics of the DualSun SPRING panel
The physical, photovoltaic and thermal characteristics of the nybrid DualSun SPRING panel can be consulted
in the datasheet published in in our online library.
The pressure losses and the thermal behavior of the panel as a function of the hydraulic flow rate can be con-
sulted in the appendices of the datasheet published in our online library.
2.2. Recommended hydraulic flow rates for the DualSun SPRING
panel
Nominal average operating flow rates:
Application DHW*Thermal discharge** Direct pool heating
Average nominal flow rate (L / h / panel) 32 100 200
* DHW: Domestic Hot Water
** Thermal discharge: Pressurized system with heat exchanger or coupling with geothermal probes
Recommended minimum filling flow rate:
• Panel in portrait mode: 200 L / h / panel
• Panel in landscape mode: 250 L / h / panel
Maximum allowable flow rate: 400 L / h / panel
WARNING
The choice of flow rate directly impacts the hydraulic pressure
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2.3. Maximum allowable pressures for the DualSun SPRING panel
CAUTION
It is imperative never to exceed the following pressures in DualSun panels:
Maximum operating pressure = 1.5 bar
Maximum filling pressure = 2 bar
The maximum filling pressure corresponds to the allowable pressure in the panels, to purge
correctly the air during hydraulic commissioning.
The pressure can be raised to 2 bar for only a few minutes.
At the end of commissioning of the installation, the maximum operating pressure to be ob-
served is 1,5 bar.
The temperature of the panels must be between 10 and 45 ° C during commissioning.
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3. Installation of the DualSun solar heating system for indi-
vidual swimming pools
Operating principle and limits [10]
Constitution of the DualSun solar pool heating kit [11]
Constitution of the DualSun solar pool drain kit [12]
Installation of the DualSun SPRING hybrid panel [12]
Selection of transfer pipes for DualSun solar swimming pool heating system [12]
Operation of the filtration pump and verification of its characteristics [13]
Installation of the DualSun BS/2 solar controller [14]
Installation of the motorized 3-way valve [19]
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3.1. Operating principle and limits
(1) = Pool filtration pump
(2) = Sand filter
(3) = Motorized 3-way valve
(4) = DualSun BS/2 solar controller
(5) = Bypass adjustment valve Ø40
(6) = Non-return valve Ø40
(7) = Ø40 flowmeter
(8) = Isolation valve Ø40
(9) = T 50/40/40
(10) = Non-return valve Ø50
(11) = T 50/50/50
(S1) = Panel temperature sensor
(S2) = Swimming pool temperature sensor
Drain kit (only for frost risk areas):
(12) = T 40/40/40 + Valve Ø32 + Threaded
end 3/4 "
(13) = T 50/40/40 + Solar ventilator
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