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18
COLLECTOR PIPING
The piping of the system should be considered before a
fi nal decision is made on how the collectors are mounted.
Piping should be made of copper tube of the type
meeting local codes, insulated with Armacell UT Solafl ex
or similar. The maximum total piping length allowed in
this system is 200 equivalent ft.
Use only lead-free solder. Use of 50/50 lead solder is
expressly prohibited. Use of galvanized steel, CPVC,
PVC, PEX or any other type of plastic pipe is prohibited.
Care should be taken in the spacing of collectors as
attachment of piping is easiest with properly aligned
collectors. The connection between the collector panels
is made with copper unions. To aid in installation the
collector array layout should be planned on the ground
and the unions soldered to the adjoining headers prior
to lifting the collectors to the roof. Similarly the top and
bottom outside header that will not be used for the inlet
or outlet (should be on opposite sides) should be capped
with the 1” copper cap provided while on the ground.
(See Figure 18 for details.)
Multiple Panel
Outlet
Inlet
1” Copper
Cap
1” Copper
Cap
Figure 18
Solar Collector
Automatic
Air Vent
1” Copper
Pipe Header
Pipe
Adapter
Collector
(Outlet)
Collector (Inlet)
Temperature
Sensor
Figure 19