Onix Tubing Installation Manual

page 74 Watts Radiant: Onix Installation Manual
The required flow rate for the injection
pump can now be determined.
100,000 = gpm
× 500 × (180 — 100)
gpm = 2.5
The
∆T is figured using the supply
temperature and return temperature
across the injection loop. This is the
boiler supply temperature minus the
zone return temperature.
Note: In most cases the pressure
drop across the injection loop will be
minimal.
Appendix