Rheem NPT 200, Руководство по установке

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SOLAR COLLECTOR LOCATION
8
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
5° (1 in 10 grade) in an indirect closed circuit system.
not exceed the maximum recommended lengths as specified in the table.
Maximum recommended total combined pipe length (solar cold + solar hot)
and number of 90° bends
Pipe Size
2 Collectors
Pipe Length 90° Bends
DN15 NR NR
For each additional 90° bend, reduce the maximum total pipe length by 0.5 m.
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.
NR
– not recommended
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 collector and may
connect to either the left or right hand side. The solar hot pipe must connect
to the top of the solar collector diagonally opposite to the solar cold pipe
connection.
The lowest corner of the solar collector installation in an indirect closed
circuit system, 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”
on page 9.
It is essential for these requirements to be followed for the system to operate
correctly and efficiently. Solar pipe work which is oversized, or is too long, or
does not have the correct fall can result in a reduction in performance or the
drain back system not operating effectively.