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CommercialHvac
28-07-2017, 02:54 PM
I have looked and looked in the literature I have and cannot fine how to turn off solenoid valve for sound damping to check super heat. Can anybody help? McQuay injects liquid onto the impeller to lower the noise level.

Steve186
13-01-2018, 04:28 AM
Hi Fella

you can switch off the liquid injection via the unit controller to do this first you need to enter the service password in the oits display password is 13317211 then go to the unit controller then press left/down button together then press right button this give you acess to advanse settings scroll to page 6 from memory maybe wrong but you will see liq inj press enter and switch off
i normally just isolate the liquid injection via the ball valve or just disconect the coil but now you have the password and advanse password if your mcquay has eev you can adjust the gain (evap liquid level)