HELIX VX-399 Installation, Operation & Maintanance Manual page 17

5 - HYDRONIC PIPING
FIGURE 5-8B Multiple Boilers Using Primary/Secondary Pumping
Heating Load Heating Load
2
2
Heating Load
CH/
System
Pump
2
Size common piping
System
per maximum heat
capacity of entire Temperature
system Sensor
1
General
Boiler Pumps
on Return
Side
Up to 16
Limit length
1
to 5' (1.6m)
boilers
12"(305mm)
2
(See Multiple Boiler Guide)
Maximum
separation
17
P/N 240010943, Rev. C [09/07/2016]