Hydra-Flex Aqua-Lab + Tsunami Operating Manual - Manual (Page 8)

© Hydra-Flex Inc 2011 - 8 -
Troubleshooting
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 pump(s) on, manually activate the chemical that is to be tested at the main car wash control cabinet. 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)
5. Repeat steps 2-4 for each chemical lane that a vacuum reading is needed for.
6. Once testing is complete, turn off the AQUA-LAB pump from the main car wash control cabinet.
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.