Sunshine Solar Evacuated Tube Solar Water Heaters, Evacuated Tube Solar Water Heater Installation Manual
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Installation Manual
Evacuated Tube Solar Water Heaters
Sunshine Solar water heaters are AS/NZ 2712:2007 certified. Please read the following instructions carefully to ensure
their correct installation for optimum results.
If you have any questions please call us on 0800 sunshine (0800 786 744)
These instructions are current as at August 2013
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Evacuated tube solar system – installation manual
This assembly manual covers assembly of the frame (if needed), roof mounting of the 20 and 30 tube evacuated solar
tube collectors and installation to the cylinder.
Contents
Page
3 Section 1
Specifications and cautions
6 Section 2
General guidelines for roof-mounting of the solar collectors
7 Section 3
Collector assembly
9 Section 4
Frame assembly when collector angle needs to be greater than the roof pitch
10 Section 5
Roof fixings
11 Section 6
Plumbing
12 Section 7
Electrical
12 Section 8
Finishing off
14 Section 9
Setting up the controller
15 Section 10
Limitations and Clauses
16 Section 11
Installer checklist
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Section 1: Specifications and cautions
Dimensions of the solar collectors: ET20 (20 tube) and ET30 (30 tube).
ET20
ET30
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Specifications
Model
ET20
ET30
Number of Tubes
20
30
Dimensions（L×W×H）
2050×1400×153
2050×2100×153
Effectual Absorb Area
1.62m2
2.42m2
Weight（Empty）
63kgs
94kgs
Manifold’s Capacity
1.15L
1.7L
Connections
G3/4" male thread
G3/4"male thread
Components
1. Heat Pipe
Transfers the thermal energy from within the vacuum tube to the condenser efficiently and
rapidly；
2. Glass tube top holder
The Part to hold the glass tubes to the manifold box；
3. Cover
Stabilises the heat pipe and minimises the thermal energy loss from the glass tube；
4. Conductive Aluminium fins
Transfer the thermal energy from the glass inner wall to the heat pipe more efficiently;
5. Vacuum layer between the glass skins;
6. Solar glass tube
High efficiency solar glass tube with maximum radiation absorption, minimum thermal
radiation losses and high insulation performance；
7. Base / tube seal
This section has a mirror finish to minimise heat loss in the vacuum layer seal zone.
Parameters
Solar collector tube parameters
Absorptivity
Emissivity
Glass
transmission
Vacuum
Tiptop temp.
Low temp.
durability
Wind
durability
≥92％
≤10％
≥92％
≤5×10-2Pa
250℃
—35℃
30m/s
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Cautions
1.1 Gloves and Eye protection must be used when handling glass tubes. Avoid scratching or any sudden blow
to tubes;
1.2 Under no circumstances are the tubes to be left exposed to the sun over a long period without heat
extraction from the system;
1.3 Unpack and install tubes after the manifold unit has been installed and all pipe work has been completed and
the system is filled.（Avoid high temperature of empty manifold to affect system efficiency);
1.4 During installation of the tubes, the pump should be switched on;
1.5 If the system is out of use for a long time, the solar collector must be covered over / shaded with a suitable
screen;
1.6 Apply locally applicable Health and Safety guidelines at all time;
1.7 The solar collector should be installed within 22°～50
0
angle.
1.8 The weight bearing capacity of the roof MUST be calculated for the maximum collector weight, the load-
bearing points and the rafter size / strength;
1.9 When heating a swimming pool or spa, a heat exchanger should be used between the pool and the collector.
1.10 Sunshine Solar manifolds are designed to operate at a maximum pressure of 6 Bar (90psi). It’s strongly
recommended to use a suitable pressure relief valve.
1.11 To extend the service life of your system, the vacuum tubes should not be installed until the system is fully
connected and ready for use.
System diagrams
For variations to this schematic (e.g. solar ready or wetback) please visit the installers section on our website
http://www.sunshinesolar.co.nz/installers.html or call us on 0800 786 744.
Mains pressure, open loop solar system with electricity – Retrofit by 4-way port
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Section 2: General guidelines for roof-mounting of the solar collectors.
The ideal location for the Solar Collectors is on a roof facing the mid-day / early afternoon sun. (North / NNW
in New Zealand).
The panel angle to the sun should be approximately the same as the geographical latitude (e.g. 36° for Auckland,
45° for Dunedin).
If the roof pitch is significantly less than this value, we recommend that the panel is elevated on a frame to
maximise the collector efficiency.
Clients will have a view on the use of a frame; it is important to explain to them (in writing) that Sunshine Solar
does recommend a frame in these circumstances to maximise efficiency, especially in higher value latitudes
(eg Dunedin).
It is important also that the panels will not be shaded for any of the day in summer or winter by trees or buildings etc.
Pitch roof – elevated Pitch roof – flat to roof Flat roof – elevated
Stainless steel fittings of an appropriate grade must be used, including roof mounting screws.
Roof cladding penetrations must be appropriately sealed according to local building code standards and must
follow good practice at all times.
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