Solahart Streamline Owner's Manual page 30

INSTALLATION – SOLAR COLLECTORS
LATITUDE OF SOME AUSTRALIAN CITIES
Adelaide 35°S
Alice Springs 24°S
Brisbane 27°S
Broken Hill 31°S
PIPE LENGTHS
The solar hot and solar cold pipes between the solar storage tank and the solar collectors shall:
be of DN15 bendable grade or hard drawn copper tube.
Annealed or soft copper shall not be used.
have a continuous fall from the solar collectors to the solar storage tank of a minimum 5° (1 in 10 grade).
not exceed the maximum recommended lengths as specified in the table.
Maximum recommended total combined pipe length (solar cold + solar hot)
Pipe Size
DN15
For each additional 90° bend, reduce the maximum total pipe length by 0.5 metres.
For each additional metre of pipe length, reduce the number of 90° bends by two.
Note: One 90° elbow is equal to two 90° bends.
Notes:
It is important not to cross connect the solar cold and solar hot pipes to the incorrect connections at the
solar collectors and at the solar storage tank.
The solar cold pipe connects to the bottom of the solar collectors and the solar hot pipe connects to the
top of the solar collectors diagonally opposite to the solar cold pipe connection.
The lowest corner of the solar collector installation, which is where the solar cold pipe connects to the
collector array, should be the corner closest to the solar storage tank. This will maximise the gradient for
the continuous fall of the solar cold pipe, by providing a shorter horizontal run of pipe work for the
vertical fall.
The hot sensor connection is at the top of the solar collector, directly above the solar cold inlet
connection.
Refer to "Warning: Plumber – Be Aware"
It is essential for these requirements to be followed for the system to operate correctly and efficiently. Solar
pipe work which is oversized, or does not have the correct fall, or is too long can result in the drain back
system not operating effectively.
Cairns 17°S
Canberra 35°S
Darwin 12°S
Geraldton 28°S
and number of 90° bends
1 or 2 Collectors
Pipe Length 90° Bends
40 metres 20
on page 31.
Hobart 42°S
Mildura 34°S
Melbourne 38°S
Perth 32°S
3 Collectors
Pipe Length
30 metres
30
Port Hedland 20°S
Rockhampton 24°S
Sydney 34°S
Townsville 19°S
90° Bends
20