2.6 SUPPLY AND RETURN PIPING
When connecting the hot water outlet and cold-water inlet to building piping, first make sure the
mating surfaces are thoroughly clean. Gaskets of appropriate size for the pipe flange must be
provided in the field.
2.6.1 BMK750 – 1000 Supply and Return Piping
Benchmark 750 and 1000 Boiler utilizes 3” (7.62cm) 150# flanges for the water system supply
and return piping connections. The physical location of the supply and return piping connections
are on the rear of the unit as shown in Figure 2-4a.
Figure 2-4a: BMK750-1000 Supply and Return Locations
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