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ABOUT YOUR WATER HEATER
BLEEDING THE SOLAR COLLECTORS
It is necessary to purge air from the collector circuit:
• When the water heater is to be turned on and the solar collectors and solar hot and solar cold pipes
have been drained.
• After maintenance has been conducted on the pipe work and air has entered the system.
• If the circulator appears not to be circulating water around the system.
Warning: Bleeding the solar collectors should be conducted in the morning, within three hours of
sunrise, when the water temperature inside the solar collectors is lower.
To purge air from the collector circuit:
• Ensure the water heater is full of water and all of the hot taps are turned off.
air bleed
valve
• Using a flat blade screwdriver, open the bleed valve (if it is not
already open) fitted adjacent to the solar hot water (from
collector) inlet of the solar storage tank (see diagram).
• The mains pressure will force water to flow from the tank and
through the pipe work, expelling air from the collector circuit
through the bleed valve. This is evidenced by spurting of water
from the drain line connected to the bleed valve.
Warning: Exercise care to avoid any splashing of water, as
water discharged from the solar collectors may be of a very high
temperature.
• Close the bleed valve when water runs freely from the drain line.
FREEZE PROTECTION
Although the system has a level of freeze protection, designed to guard the system from unexpected
frost conditions, the system is not recommended for installation in areas subject to frost or freeze
conditions. Freeze conditions occur below 6°C. The system has NO WARRANTY for freeze damage
(refer to
“Warranty Exclusions” on page 37).
The anti freeze control is designed to recirculate a small amount of water from the solar storage tank
through the solar pipe work during periods of low temperatures. This is to prevent the water inside the
pipe work from freezing. The solar hot and solar cold pipes must be fully insulated with closed cell
polymer insulation (minimum thickness 13 mm) to offer protection against freeze damage. It is essential
that the electrical circuit to the solar control unit is continually turned on if there is a risk of freezing. The
solar warranty does not cover damage caused by freeze conditions.
Notes:
• If it is necessary to switch the power off to the solar control unit and there is a risk of freezing, then
it is necessary to have your plumber drain the solar collectors and solar flow and return pipe work.
• The freeze protection system will be rendered inoperable if electrical power is not available at the
solar control unit.
• Pipe work between the solar collectors and solar storage tank must be insulated.
• The system is not covered for freeze damage.
• Refer to
“Warranty Exclusions” on page 37.
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