Hydra-Flex Aqua-Lab CS1 Prep Installation and Operating Manual User Manual
Page 7
Operating Manual
© Hydra-Flex Inc 2011
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Injector Vacuum Check (for troubleshooting injectors)
1. At the ChemFlex injector, remove the chemical feed line from the injector hose barb.
2. Attach the tubing of the vacuum gauge to the ChemFlex hose barb
3. With the gun open and the system running an injector that is working properly will have a reading greater than or
equal to (≥) 20 in Hg
4. If injector is not functioning:
a) Check metering tip for clogs (can be tested with no metering tip to ensure injector is performing)
b) Try smaller injector (this will produce less flow and thus less backpressure)
c) Remove a nozzle(s) at the arch, allowing water to free flow (this will reduce backpressure)
There is a variation of performance in the injectors that comes from slight variations in the dimensions of the parts and in assembly that are
unavoidable. It is common to see the resultant vacuum range from 20 in Hg all the way up to 28. There is also variation in the through hole size on the
meter tips from Dema (within their manufacturing tolerances). Using the same tip color from site to site is a good starting point. However with the
potential for variation from part to part it is reasonable to still need to do some adjustments from there.