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HYDROGEN GAS
During this procedure there MUST be no smoking, open flame or any electrical appliance
operating nearby.
CAUTION
In the case of systems using a vitreous enamelled lined cylinder, if the hot water unit is not used for two weeks or
more, a quantity of hydrogen gas, which is highly flammable, may accumulate in the water heater. To dissipate this
safely, it is recommended that a non electrically operated hot tap be turned on for two minutes at a sink, basin, or
bath, but not a dishwasher or other appliance. If hydrogen is discharged through the tap, it will probably make a
sound like air escaping.
WATER TEMPERATURE
The solar control unit and pump ensure water circulates between the solar collectors and storage cylinder until the
water at the base of the cylinder reaches approximately 65°C. Under these conditions water at the hot outlet may
exceed 85°C. During periods of low solar gain supplementary heating occurs as required.
To meet Australian regulatory requirements, supplementary heating MUST be operational.
IMPORTANT
WATER QUALITY
The water quality of most public supplies is suitable for the water heating system. The water quality from bore wells
is generally unsuitable for the water heating system. Refer to separate 'Warranty Terms and Conditions' document
for water quality parameters and how they affect the warranty conditions. If in doubt about the water quality, have
it checked against the parameters listed in the warranty conditions. The system is not suitable as a pool or spa
heater.
DRAINING AND FILLING THE WATER HEATING SYSTEM
Draining or filling normally occur only during installation or servicing and must be carried out by an authorised
person.
MAINTENANCE AND REGULAR CARE
Operate the easing gear of the PTR as described in the section 'Safety Devices' on page 6.
The overflow tray (supplied by installer) and drain underneath the storage cylinder (if fitted) should be periodically
checked to ensure there are no blockages.
SERVICING AND REPAIR
Our Servicing network personnel are fully trained and equipped to give the best service on your appliance. If your
appliance needs service, ring one of the service contact numbers on the back of this booklet.
It is recommended that the system be serviced at least every 5 years.
The pressure and temperature relief valve and expansion control valve MUST be checked for
performance or replaced by an authorised person at intervals not exceeding 5 years or more
frequently in areas where the water is classified as scaling water (refer to the supplied warranty
IMPORTANT
booklet).
It is recommended that the sacrificial anode fitted to Glass Lined cylinders be inspected every 5 years or more
frequently in areas where there is a high incidence of water deposits. This does not apply to Stainless Steel
cylinders. Anodes suited to hard and soft water, are available from Rinnai.
If the electric conduit, power supply cord or plug to the water heater is damaged, they MUST be
replaced by an authorised person in order to avoid a hazard. The power supply cord and plug (if
fitted) MUST be replaced by a genuine replacement part available from Rinnai.
IMPORTANT
Rinnai
WARNINGS AND IMPORTANT INFORMATION
7
EVT DD Solar Pre Heat System Operation and Installation Manual
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