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4 Water connections
Installation & Service Manual
Figure 4-6_Primary/secondary piping of multiple boilers
SECONDARY
BOILER
PUMP
FROM
SYSTEM
12" OR 4X
PIPE DIAMETERS
AIR
SEPARATOR
MAKE-UP
WATER
PRESSURE
RELIEF
VALVE
EXPANSION
TANK
LOW WATER
CUT-OFF
(OPTIONAL)
TO SYSTEM
SYSTEM
PUMP
COMMON MANIFOLD SIZE (Min.)
Models: 497 - 747
Number of Units GPM
Diameter
(in.)
2 120 3 1/2
3 180 4
4 240 5
5 300 5
6 360 6
7 420 6
8 480 6
COMMON MANIFOLD SIZE (Min.)
Models: 987 - 2067
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
*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