Advance Power 16004-12 Installazione manuale - Pagina 4

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In order to receive optimum results, POLY PRO

collectors should operate at or near nominal flow

rates. Recommended nominal and minimum flow

rates for the different collector sizes and maximum

number of collectors per row are:

For example: nominal flow through a row of nine

collectors, size 4x10 ft. is 9x4 GPM = 36 GPM.

Compare your nominal flow with the flow rate of the

pump. Consult the performance curves from the pump

manufacturer if you are not sure. If the flow rate is

excessive (more than 10 GPM per collector), or if the

system pressure is greater than 30 PSI, a bypass line

should be installed between the collector supply and

return lines above the three-way value.

If the flow rate is below the minimum as shown in the

table above, then the size of the filtration pump or

pipe size should be increased, or a booster pump

installed in some cases.

Select appropriate pipe size for the system supply and

return lines. The headers of the POLY PRO collectors

are 2", and the pipe adapters, included in the kits,

connect to 2" PVC Schedule 40 pipe.

To avoid excessive pressure loses the following

minimum pipe sizes for the supply and return lines are

recommended.

Where the recommended size is not available or

where the length of the lines exceeds 100 feet, use the

next larger size.

Step 2: Decide on System Layout and Placement of

Collectors

The basic consideration for the system lay-out is to

ensure uniform flow across each collector, equal flow

through every collector in the system and that the

system drains automatically when not in the

operation. This is accomplished with connecting the

supply line to the bottom (or inlet) header, and the

return line at the opposite diagonal flow. The outlet

headers must be pitched in a vertical distance of at

least 8" (20cm) above the inlet headers to assure

proper drainage and performance (4* angle from

horizontal).