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Figure 2 - pRimARY SECONDARY pipiNG
An alternate method of connecting the supply and return piping can be seen in figure #2 below.
(Refer to the engineering manual for detailed piping recommendations.)
PRIMARY
PUMP
FRONT OF
BOILER
LOAD
PUMPS
Note: The tapping sizes for the supply and return piping are 2" and 1 ½" respectively.
It is recommended that the main piping be 3" and the branches 1 ½".
PRIMARY SECONDARY PIPING
PRIMARY
LOOP
AIR ELIMINATOR &
EXPANSION
TANK
TO
EXPANSION
TANK & SYSTEM
FILL
12"
MAX
BRANCH
SECONDARY
REAR OF
BOILER
7
PUMP
BRANCH
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