ECR International Dunkirk DMG-380 Installation, Operation & Maintenance Manual page 18

FIGURE 5-7 - Multiple Boilers with Common Primary Secondary, Zone Pumps and (Optional) Indirect
DHW/System
Pump
12" (305mm) Maximum
Separation required if Labor
Saver is NOT used.
5 - HYDRONIC PIPING
System
Temperature
Sensor
UP TO 6 BOILERS
Refer to pump manufacturer
literature for proper pump sizing.
18
1
# Boilers on Pipe
Pipe Branch Size
2 2
3 2½
4 3
5 3
6 4
7 4
8 4
PN 240011664, Rev. F [07/30/2018]