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Installation & Operation Manual
39
Figure 4-3_Primary/Secondary Piping of a Single Boiler w/DHW
4 Water connections (continued)
COMMON MANIFOLD SIZE (Min.)
Models: 402, 502, 652, & 752
Number of Units GPM
Diameter
(in.)
1552
COMMON MANIFOLD SIZE (Min.)
Models: 992, 1262, 1442, 1802 & 2072
Number of Units GPM
Diameter
(in.)
1 90 2 1/2
TO
FLOOR
DRAIN
HEATING
SUPPLY
LOOP
TO EXPANSION
TANK AND MAKEUP
WATER SYSTEM
HEATING
RETURN
LOOP
12"
MAX
HOT WATER
GENERATOR
Please note that these illustrations are meant to show system piping concept only, the installer is responsible
for all equipment and detailing required by local codes.
NOTICE