SolarArk S20 Bedienungsanleitung
Solar Hot
Water
Systems
Owner’s Manual
Providing Insight into hot water, solar systems and various components used
within a SolarArk Solar Hot Water System This is a confidential document for
SolarArk representative use only This document is to be taken as a basic
introduction into solar heating
July 2012
Copyright © SolarArk Owner’s Manual version 2 3 July 2012 P a g e | 2
Table of Contents
Introduction to Solar Water Heating 4
Key Features 5
Tempering Your Water Supply 6
Boosting Options 6
Gas Boosting 7
Water Flow 7
Electric Boosting 8
Important Information 8
Local Standards 8
SolarArk Accreditations 8
Authorised Installers 9
Safety Precautions and Legionella 9
Pressure and Temperature Control and Relief 10
Water Quality 10
Corrosion 11
Freeze protection and Snow Loading 11
Hail Resistance 11
Wind Stress 11
Collector Dimensions & Weights 12
Roof Structural Integrity 12
Stagnation and Excess Heat 12
Storage Tanks 13
Tanks – Stainless Steel 14
Tanks – Vitreous Enamel (Glass Lined) 14
Solar Collector Installation 15
System Design-Electric Boosted Solar Water Heater 15
System Design-Gas Boosted Solar Water Heater 16
Mounting Frame 17
SolarArk Maintenance 18
PTRV 18
Glass Breakage 18
Replacement of Broken Tubes 18
Unpacking New Tubes 18
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Evacuated Tube Installation 19
Insulation 19
Other System Components 19
TROUBLESHOOTING 20
Precautions and Warnings 21
Warranty 22
Warranty Conditions 22
Warranty Exclusions 23
Component Warranty 26
SolarArk Warranty Claim Procedure 28
Disclaimer 29
SolarArk’s Frequently Asked Questions 30
Copyright © SolarArk Owner’s Manual version 2 3 July 2012 P a g e | 4
Thank you for your decision to purchase a SolarArk Evacuated Tube
Hot Water System
The content of this manual provides detailed information on
maintenance, troubleshooting, safety precautions and warranty that
should be thoroughly read and adhered to following installation
Should you have any questions regarding the information contained,
please contact SolarArk on Ph: 1300 760 966 for support
Introduction to Solar Water Heating
The design of the cylindrical evacuated tubes allows maximum absorption of the suns energy to
convert it to heat
The cold water from the bottom of the storage tank is pumped up to the insulated manifold of the
solar collector, which passes through the heat exchanger It absorbs the heat and is returned back
to the storage tank
The controller measures the differential temperature between the water supply from the bottom
of the tank and the water return from the collector to maintain the set temperature within the
storage tank
The circulating pump operates intermittently throughout the day to maintain maximum hot water
output and minimise energy consumption
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Key Features
SolarArk utilizes copper, aluminium and titanium as part of a three target film technology
This provides excellent heat retention that exceeds other standard tubes by more than 12%
The diameter of the heat exchanger has been
specifically designed to maintain low pressure drop
High density Rockwool insulation is used to ensure
maximum solar heat gain by minimising the amount of
heat loss even in cold temperatures
The solar controller will maintain the temperature at the bottom of the tank to a pre-set
temperature of 65°C to 70°C The on/off differential settings of the controller are designed
to ensure optimum pump cycling as the water in the manifold heats If the collector reaches
8°C hotter than the tank the controller turns the solar pump on, and off again once the
temperature decreases to 2°C
SolarArk solar collector tubes and heat exchanger are individually tested for vacuum and
pressure to guarantee the highest quality
The tubes are designed to withstand hail and high winds, have long lasting performance and
are cheap and easy to replace if damaged
The complete system is lightweight for easy installation and the stainless steel frame is
resilient to corrosion
SolarArk are proud to provide a 15 year warranty on their complete solar collector
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Tempering Your Water Supply
Tempering valves are mandatory throughout Australia They are to comply with local regulations as
a safety device to reduce hot water supply to a maximum of 50°C
The function of the tempering valve is to reduce the 65-75 degree water leaving your hot water
storage tank and blending it with cold water to achieve 50°C and reduce the possibility of scalding
All adjustments of a tempering valve should only be carried out by a licensed plumber
Boosting Options
For further procedures please follow gas booster model instructions.
Gas boosted
Electric Boosted
During periods to low solar contribution, gas or electric boosting is required to maintain 60°
temperature
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Gas Boosting
The instantaneous gas booster is activated if the water passing through is <60°C The gas booster
will automatically turn off when boosting is not required, therefore increases energy efficiency
Points to Note:
The gas booster operates when there is a minimum of flow rate of 2 4
lpm of hot water flowing through the booster The use of water saving
devices that have less than 9lpm flow rate or that have restrictors may
interfere with the operation To ensure operation, open the hot tap
fully to check if the gas booster comes on
The S20 gas booster requires a minimum of 120 kPa water pressure
and the S26 requires a minimum of 160 KPa water pressure to achieve
the maximum flow rate and optimal function If the pressure is less
than the required pressure, a water pressure pump should be installed
Electronic temperature controllers will not work with SolarArk systems and are not to be
used
Water Flow
S21 or S26 hot water gas boosters have limited hot water flow due to the flow rate of the gas
booster (21 or 26 litres per minute)
To ensure that your instantaneous unit functions effectively, it is advisable to use a AAA rated
showerhead with a minimum flow of 9 lpm It is also recommended to periodically check
showerhead for any debris or deposit built-ups as this may affect water flow and temperature
Model Name
Model Numbe
S20
S26
Facto y Default Temp
°C
60
60
Colou
Dune
Wate P essu e (kPa)
Min
120
160
Max
1000
Gas Rate LPG (Mj/h )
Min
11 3
14 7
Max
125
188
Gas Rate NG (Mj/h )
Min
10 9
13 8
Max
125
188
Flow Rate 25°C Rise (lpm)
Min
16
24
Flow Rate Max (lpm)
Max
20
26
Connection Sizes Gas/Hot/Cold
(mm)
20/20/20
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Electric Boosting
An electric boosted water cylinder is supplied with a 3 6kW
electric boosting element as standard The thermostat is set
to 60°C If solar radiation is low, the electric boosting
element will activate to compensate for heat loss
Generally, the required heating time would occur overnight
during the off-peak Tariff If off-peak is not available, the
continuous Tariff will require a timer setting to be activated
early evening or overnight when solar radiation is at its
lowest
Important Information
ocal Standards
Installation must be completed in accordance with the requirements of AS/NZS 3500 4
(AS/NZS3500 4 2 “National Plumbing and Drainage Code Hot Water Supply Systems – Acceptable
Solutions”), or in New Zealand, Clause G12 of the New Zealand Building Code, as well as any
relevant local standards and regulations
SolarArk Accreditations
BSI Benchmark Certification is an Australian Company originally established in 1993 to provide
independent certification services to companies wishing to achieve formal recognition of their
management systems ISO 9001, QS-9000 and ISO 14001 and Product Certification
Accreditation by JAS-ANZ also implies that companies approved by BSI Benchmark Certification is
recognised and accepted in each country where JAS-ANZ has signed a Memorandum of
Understanding with other National Accreditation Board
The Institute for Thermodynamics and Thermal Engineering (ITW) has been working in thermal
solar energy since the early 1970s In 1993 the Research and Testing Centre for Thermal Solar
Systems (TZS) was established TZS is the largest testing centre for solar thermal components and
systems in Europe TZS has long standing established experience in testing the full spectrum of solar
thermal experience in testing the full spectrum of solar thermal products as well as in conducting
research and development projects with partners from research organisations and industry
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Authorised Installers
All installation of SolarArk solar hot water systems must be installed and checked by an authorised
licensed plumber who holds all relevant qualifications
Any inspections, repairs or maintenance that is required should only be carried out by a person
authorised by SolarArk Pty Ltd
Safety Precautions and egionella
In order to kill Legionella bacteria it is an Australian standards requirement (AS3498-2009) that the
hot water in the storage tank be heated up to at least 70°C on a regular basis, either while in the
storage tank (solar electric) or by a post boost (gas continuous flow)
Bottom element electric: The hot water storage tank must reach 60°C at least once a week The
element should be activated at least once weekly during winter months and overcast weather The
element is located at the bottom of the tank
Mid element electric: The hot water storage tank must reach 60°C at least once daily The element
should be activated daily during winter months and overcast weather The element is located in the
middle of the tank, lowering boosting costs by boosting half of the tank until the solar unit kicks in
again
Gas boosted systems: Gas booster must be left on at all times It will only boost the water if it is less
than 60°C
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Pressure and Temperature Control and Relief
The pressure & temperature Relief Valve is supplied with the water heater
from the manufacturer The valve must be installed into the socket marked
“RELIEF VALVE” No hot water storage tank should be operated without the
PTRV fitted and functional The PTRV should be checked for correct
operation or replaced at intervals not exceeding 5 years
The lever on the relief valve must be lifted and lowered very slowly to
operate the valve at least once every 6 months Failure to operate the relief
valve at least once every six (6) months may result in the water heater
exploding
The relief valve and its drain outlet pipe must not be sealed or blocked
Water Quality
All hot water storage tanks have been manufactured to suit water conditions of most Australian
metropolitan supplies Water supplies outside of the specifications specified can have a damaging
effect on the water heater and its longevity Information can be obtain from your local water supply
authority regarding water quality details
Wate Acceptability Composition Range fo Stainless Steel Tanks
Water Quality
Total Dissolved Solids <600 mg/litre or ppm
Total Hardness <200 mg/litre or ppm
Chloride <250 mg/litre or ppm
Sodium <150 mg/litre or ppm
Magnesium <10 mg/litre or ppm
PH Levels 6 5 – 8 5
Electrical Conductivity 850 µS/cm
Wate Acceptability Composition Range fo Vit eous Enamel Tanks
Water Quality
Total Dissolved Solids <600 mg/litre or ppm
Total Hardness <200 mg/litre or ppm
Chloride <300 mg/litre or ppm
Sodium <150 mg/litre or ppm
Magnesium <10 mg/litre or ppm
PH Levels 6 5 – 9 5
Electrical Conductivity 850 µS/cm
Iron 1 mg/litre
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