Service Center Solahart (081313462267) water heater | Page 21

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

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When in position, secure the tank straps to the roof rafters as for the collector strap. Ensure the straps are tight. Replace the
roof tiles. Fit the Temperature Pressure Relief Valve (Part No. 45-1104) into the tank as per water connection diagrams on
page 50.
If the installation involves the HartStat System this should now be fitted. Refer to “Systems Installed with an Over
Temperature Protection (OTP) System” on page 20 and to the installation instructions provided with the HartStat Kit for
details.
FIBRO CEMENT OR METAL SHEET ROOFING

Select a location for the storage tank, close to a purlin. Avoid locating tank at mid-span of sheeting. Fixing and assembly
procedures are similar to that detailed for tiled roofs, with the exception that the tank straps and the collector straps are
fixed with coach screws to the purlins below (refer to drawings, Page 41).
METAL TILED ROOF

Select a location for the storage tank. The front mounting foot of the tank should be positioned directly over a tile batten.
Fixing and assembly procedures are similar to that detailed for tiled roofs, except that the tank and collector straps are fixed
with spring head galvanised nails directly through the metal tiles into the rafters below. Seal under the straps with a
weatherproof mastic sealer.
INSTALLATIONS USING STANDS

Refer to installation sheet in the stand kit.
SPECIAL CONSIDERATIONS FOR COLD CLIMATES

In areas where air temperatures fall below -15ºC at any time or where snow will remain on the ground for more than 24
hours continuously, refer to your Solahart dealer for specific recommendations on suitability of location.
In areas subject to heavy snowfalls, care should be taken that snow cannot build up behind the tank and that the brackets
installed are capable of withstanding the expected snow loading. In these cases install the tank as close as possible to the
roof ridge.
Ensure that pipes and valves are located away from freeze locations wherever possible. Note that freezing of the valves can
permanently damage the valves. Take particular care at roof penetrations. Install the TRIO Valve and Cold Relief Valve
indoors (e.g. in the laundry) or in other locations not subject to freezing, but NOT in the ceiling space. If these valves are
located external to the building they must be insulated with at least 19 mm of elastomeric closed cell insulation, and sealed
to prevent entry of moisture.
In locations frequently subject to atmospheric temperature below -10ºC, hot and cold pipes and valves may freeze even
when insulated. It is recommended that in these locations, the cold pipes and valves to the Solahart storage tank and the hot
pipe from the tank should have electric heater tape under the insulation. The electric heater tape should have a heat output
of between 10 and 20 W/m. The tape should be a self-limiting tape such as “Raychem” and should be controlled by a
thermostat set at 0ºC. Connect the heater tape to a normally ON power supply.
FILLING AND COMMISSIONING OF THE STORAGE TANK

!

WARNING: DO NOT TURN ON ELECTRIC POWER UNTIL AFTER THE WATER HEATER HAS BEEN FILLED
WITH WATER.

Turn on at least one hot water outlet tap - preferably over a bath or laundry basin. Open the mains water supply tap on the
line to the water heater and allow the water to fill the storage cylinder displacing air out of the top of the cylinder through
the open tap. As soon as water flows freely (without air bursts) from the tap, close the tap and allow the cylinder to
pressurise. Check all joints for water tightness.
Turn on the electric power to the booster element ensuring that the power is correctly connected i.e. „Active‟ line to
„Active‟ terminal etc.
Operate both pressure relief valves‟ easing gears to ensure that the valves are functional. The storage tank is now filled and
ready to operate as an electric water heater. To operate as a solar water heater, the closed circuit must be commissioned by
an authorised Solahart installer or service contractor.