UTICA BOILERS UBSSC-299 Installation, Operation & Maintenance Manual page 21

5 - HYDRONIC PIPING
FIGURE 5-8B Multiple Boilers Using Primary/Secondary Pumping with Closed External Primary Loop
12"/305mm Maximum Separation
12"/305mm Existing closely spaced tees
Maximum in primary system loop
Separation
CH/System
Pump
System Size common piping
Temperature per maximum heat
Sensor capacity of entire system
Limit
length to
5' (1.6m)
All internal
primary loop ball
valves closed
3/8"/10mm Open
End Wrench may
be required to turn
valve
Up to 16
boilers
21
PN 240011320 Rev. G 10/01/2021]