UTICA BOILERS SSC UBSSC-075 Installation Operation & Maintenance page 19

5 - HYDRONIC PIPING
FIGURE 5-8B Multiple Boilers Using Primary/Secondary Pumping with Closed External Primary Loop
Heating Load Heating Load
12"/305mm Maximum Separation
Heating Load
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
Up to 16
3/8"/10mm Open End
Wrench
boilers
19