2. A stand alone “indirect fired” tank heat exchanger . Indirect fired tank heat exchangers generally include a stainless steel internal coil within an insulated stainless steel tank. This unit is then connected in series upstream of the existing water heater. Contact your GARN® dealer for sizing, availability and pricing of a preheat unit. The following applies to any domestic water heating system:
For more information on indirect fired water tanks visit: http://www.triangletube.com/ http://www.weil-mclain.com/ http://www.heat-flo.com/
SOLAR INTERFACE:
GARN® equipment can be ordered factory ready to connect to solar collectors. The collector with the simplest interface is the drain-back solar collector. Water is pumped from the GARN® unit to the collector, is circulated through the collector, and then drained back into GARN® unit via gravity. The optional ¾” F PT flanged fitting on the left side of the manway collar is the drain back fitting where the return line from the collectors is to be connected. Some solar collector designs utilize a collector non-water based medium in lieu of water. Such collectors require a heat exchanger to interface with the GARN® unit. Refer to manuals and data provided with the solar collectors regarding proper installation.
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Hydronic System Design Manual ©DECTRA CORPORATION - March 2013
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