faucet in the household and allow the water to run. If it goes from cold to warm to hot, the
system is working properly. This test is the same as for any conventional residential gas or
electric water heater. For a more precise measurement follow the procedure above for
comparing the temperature difference between the supply and return piping. Again, these tests
are best performed during the afternoon of a clear sunny day.
If the system is to be unused for a long period of time, such as absence due to vacation times, it
is best to leave the P
ROGRESSIV
T
UBE
®
system filled with water and in the solar pre-heat mode.
If unused for long periods of time during winter months in freezing climates, it is best to drain the
collector and the solar loop piping.
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Summary of Contents for PROGRESSIV TUBE
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