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Figure 4-4_Primary/Secondary Piping of Multiple Boilers
COMMON MANIFOLD SIZE (Min.)
Models: 502, 752, 1002, & 1302
Number of Units GPM
Diameter
(in.)
2 150 3 1/2
3 225 4
4 300 5
5 375 6
6 450 6
7 525 6
8 600 8
COMMON MANIFOLD SIZE (Min.)
Models: 1501, 1701, & 2001
Number of Units GPM
Diameter
(in.)
2 180 4
3 270 5
4 360 6
5 450 6
6 540 6
7 630 8
8 720 8
4 Water connections
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Installation & Operation Manual