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	Just add, collector, storage tank and a circulating pump and you're all set to begin saving energy BIG TIME!!! List Price: $176.00 Our Price: $148.50 You Save $27.50 Product Code: NN SHW C 1800 Qty:

Description Technical Specs How it Operates   In its most basic mode the controller senses the temperature in the bottom of a solar storage tank and compares that against the temperature of the collector sensor and when the temperature in the collector rises a set amount above the temperature in the bottom of the storage tank, a relay is energized and this can start a circulating pump. When the sun goes down and the temperature of the collector reduces to a set amount above the temperature in the bottom of the storage tank; the controller de-energizes the relay which shuts off the pump.  There are several more functions, which are described in the well written manual. Speaking of the manual it can be seen here.

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