State Standard Systems - Manual (Page 19)

19
collector pipinG
The piping of the system should be considered before a final
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 Solaflex or equivalent.
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 only type “L” or “M” copper
tubing in the collector loop plumbing. 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 or couplings. To aid in installation
the collector array layout should be planned on the ground
and the unions or couplings 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.
VERTICAL MOUNT
OUTLET
INLET
1” COPPER
CAPS
HORIZONTAL MOUNT
OUTLET
INLET 1” COPPER
CAPS
Figure 18.
SOLAR COLLECTOR AIR VENT
1” COPPER
PIPE
HEADER
PIPE
ADAPTER
COLLECTOR
(OUTLET)
COLLECTOR
(INLET)
TEMPERATURE
SENSOR
Figure 19.