Dunkirk Helix VLT Vertical Laser Tube, Wall Hung Modulating Condensing Boiler - Manual (Page 20)

20
5-8C Multiple Boilers Using Primary/Secondary Pumping with Open External Primary Loop
Existing closely spaced tees
in primary system loop 12"/305mm
Maximum
Separation
CH/System
Pump
12"/305mm Maximum Separation
System
Temperature
Sensor
Size common piping
per maximum heat
capacity of entire
system
Heat exchanger
ball valve open
(as shipped)
Limit
length to
5' (1.6m)
5 - HYDRONIC PIPING
3/8"/10mm Open
End Wrench may
be required to turn
valve
Up to 16
boilers