50:50 vinegar/water or 1/8:1 - trisodium phosphate/water solution is recommended to remove solder flux and
other impurities from the fluid passageways. Circulate for 15 mins, drain, rinse, recharge with desired HTF.
Collectors are designed to be installed in the vertical position (Figure 6). All vertical piping between the storage
tank and the collector shall be supported at each story or at maximum intervals of ten (10) feet. Copper
plumbers tape or tube strap is required. The pipe insulation may not be compressed or crimped by the strapping
material. It is not recommended that collectors be mounted with the parallel flow tubes in the horizontal
position. In the event this is the only option, the collectors must slope downward toward the collector inlet by
no less than ¼" per foot.
Figure 6
The "To" and "From" Collector plumbing lines should also slope ¼" per foot from the collectors back to the tank.
The installation of all horizontal and vertical piping may not reduce the performance or rating of any structural
member or fire rated assembly. Adhere to all applicable local codes and ordinances.
This solar collector is leak tested at the factory. Once the collector has been installed as part of a domestic solar
water heating system, the system should be filled, pressurized and checked for leaks. Repairs should be
corrected and the system retested prior to insulation installation.
Pipe Flashings
Pipe flashings are used to transition through the roof membrane and into the attic space for subsequent
connection to the interconnect plumbing. All roof penetrations are to be sealed in accordance with standard
roofing practices. Make roof penetrations between trusses to allow for thermal expansion and slight flexing of
the pipe from wind buffering.
Standard plumbing roof vent stack flashings can be used, however, the rubber or plastic boot must be protected
from the sun. Figure 7 details an all copper flashing which uses a "coolie" cap soldered to the interconnect
plumbing. This connection should be made prior to insertion through the flashing base.
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