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INSTALLATION
For a single water heater installation, refer to the
installations, follow the
instructions on pages
MAINS WATER SUPPLY
Where the mains water supply pressure exceeds that shown in the table below, an approved pressure limiting
valve is required and should be fitted as shown in the
Model
Temperature pressure relief valve setting
Expansion control valve setting *
Maximum mains supply pressure
With expansion control valve
Without expansion control valve
* Expansion control valve is supplied with the water heater installation parts kit
TANK WATER SUPPLY
If the water heater is supplied with water from a tank supply and a pressure pump system is not installed, then
the bottom of the supply tank must be at least 1 m above the highest point of the hot water plumbing system,
including the water heater. Care must be taken to avoid air locks. The cold water line to the water heater should
be adequately sized and fitted with a full flow gate valve or ball valve.
RAINWATER COLLECTION SYSTEM
Before installing a closed circuit system, the installer should determine whether rainwater runoff from the roof
on which the system will be mounted, is collected in a rainwater tank. If a 52H series system is to be installed
on a section of roof which is part of a rainwater collection system, then it is recommended this section of roof
and its gutter be isolated from the rainwater collection system. The gutter should be isolated to a width greater
than the solar collectors and pipe work and must have suitable drainage. The installer should ensure in the
event of a leak from the closed circuit, a rainwater tank cannot be contaminated with closed circuit fluid.
The closed circuit fluid acts as an anti-freeze agent and rust inhibitor, is non-toxic to humans and is harmless
to the environment. However it does have an adverse effect on water stored in rainwater tanks. It will kill
microscopic algae typically present in rainwater tanks and cause an unpleasant odour to develop. This will
result in the rainwater tank having to be drained and cleaned.
The section of roof and gutter should be isolated from the rainwater collection system before the commissioning
of the solar water heater, so that any leak or spillage during commissioning does not make its way into the
rainwater tank.
The installer should discuss alternative options to suit the installation with the householder. Any alterations to
the roof drainage system must comply with the relevant building regulations, codes and Standards.
"Rainwater Collection System"
Refer to
does become contaminated with closed circuit fluid.
WATER CHEMISTRY
The system is not suitable for installation in areas with harsh water chemistry. The system has NO WARRANTY
for damage caused by harsh water chemistry.
"Water Supplies"
Refer to
heaters.
62
and
180, 300
850 kPa
700 kPa
550 kPa
680 kPa
on page 15 for additional information on what to do if a rainwater tank
on page 19 for information on the water chemistry limits which apply to the water
diagrams on pages
35
and
63.
cold water connection diagram
28
36. For multiple water heater
on page 56.
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