HTP PH130-119S, Установка, эксплуатация и обслуживание

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Figure 3 - This detail is an example of a typical solar roof mount application. All equipment should be
installed in accordance with all local codes and best practices as identified with National Roofing
Contractors Association (NRCA) or other qualified body.
J. COLLECTOR LOOP PIPE INSULATION
To minimize heat loss, the collector loop cold supply and hot return lines must be well insulated with high
quality flexible closed cell insulation. The wall thickness of the pipe insulation should not be less than ¾”.
A 1” wall thickness is required in all areas prone to annual hard freeze conditions. When it comes to pipe
insulation the rule is simple: thicker is better. The specified piping insulation material is Rubatex Insul-
Tube 180 or equal.
To the extent possible, slide the insulation material over the pipe without cutting or taping. All butt joints
must be sealed with contact adhesive. The use of rigid polyethylene pipe insulation is prohibited. The
temperatures generated by your collector in the summer months or under stagnation conditions can melt
this type of material.
Any above ground exterior pipe insulation is subject to UV degradation and must be wrapped with foil
tape or painted with two coats of high quality water-based acrylic resin coating as supplied by the
insulation manufacturer. The required coating material is Rubatex UV Protective Coating or equal.
K. COLLECTOR PIPING
Collector piping requires the use of all copper and brass fittings in the collector loop. In glycol loops, cast
iron is also acceptable. Couplings rather than unions should be used to join the collectors to avoid leaks
and fluid loss. Use only lead-free solder. Engelhard Silvabrite 100 or equal is required. Use of 50/50 lead
solder is expressly prohibited. Use of galvanized steel, CPVC, PVC, or any other type of plastic pipe is
prohibited.
Piping in new solar installations may have dirt, grease, solder flux, or other impurities in the piping that
over time affect the quality of the glycol HTF. A thorough cleaning is required before charging the system
with glycol.
All vertical piping between the storage tank and the collector shall be supported at each story or at
maximum intervals of ten feet (10’). Copper plumbers tape or tube strap is required. The pipe insulation
may not be compressed or crimped by the strapping material.