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33-1197 Solahart Owner‟s Manual – Thermosiphon Systems - Revision H – Nov 2013

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TEMPERATURE LIMITING DEVICES

This water heater can deliver water at temperatures which can cause scalding.
It is necessary and we recommend that a temperature limiting device be fitted between the water heater and the hot water
outlets in any ablution area such as a bathroom or ensuite, to reduce the risk of scalding. The installing plumber may have a
legal obligation to ensure the installation of this water heater meets the delivery water temperature requirements of
AS/NZS 3500.4, or other plumbing codes applicable in your area, so that scalding water temperatures are not delivered to a
bathroom, ensuite or other ablution area. Refer to plumbing codes applicable in your area to see if a temperature limiting
device is required for this installation for the supply of hot water from the solar water heater.
The temperature limiting device used with a solar water heater should have a specified „minimum temperature differential‟
between the hot water inlet and the tempered water outlet of no greater than 10°C. In addition, a temperature limiting
device capable of receiving a hot water supply temperature of up to 99°C should be used in conjunction with a
thermosiphon system. Refer to the specifications of the temperature limiting device.
For safety reasons Solahart recommends the fitment of temperature limiting devices in all instances.
EXTERNAL PIPE INSULATION

Refer to local plumbing codes (e.g. AS/NZS 3500.4) for the requirement for insulation of external pipe work.
Solahart recommends:
That all hot water pipe work should have closed cell insulation of minimum 13 mm thickness; this includes tank to
collector inter-connecting pipe. Thicker insulation may be required on external pipes to comply with the energy
efficiency requirements of AS/NZS 3500.4 in certain regions. Insulation should be suitable for the temperature of
operation (i.e. at least 90⁰C for hot water supply pipes and at least 120⁰C for tank to collector connections).
Where potable water piping is in an external location or attic space where the temperature can be as low as -7°C
(18°F) it should be insulated with a minimum 19mm closed cell insulation; where the temperature can fall to -11°C
(12°F) the insulation thickness should be increased to 38mm.
Insulation in external locations should be weatherproof and resistant to UV radiation.
Insulation will improve system performance and will also protect against burns where heater is in trafficable location.
STOVE COIL BOOSTERS

Manually fed boosters such as stove coils, back boilers or coils in open fired grates are not permitted to be connected to
Solahart water heaters unless the storage cylinder is open vented. Such auxiliary energy sources must not be connected into
the closed circuit. Installation details for these devices are available from Solahart on application. In Australia, refer to
AS/NZS 3500.4 for additional information. Refer also to your local water authority requirements for details of vent design,
header tank and reduction valves.
IN-SERIES GAS BOOSTING

Refer to the installation manual provided with the booster.
PACKING, STORAGE & TRANSPORTATION

All Thermosiphon products are to be kept in the original packaging materials and should be stored or transported in the
vertical position - note there is an arrow to indicate the „UP‟ direction for Tanks.
SYSTEM DECOMMISSIONING

Decommissioning of the system should be undertaken by an installer or suitable qualified plumber and / or electrician (if
required). All materials used in this product can be passed to your local material recycling centre for disposal - refer to
local council regulations for details.
For installation checklist please see page 54.