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ALMU
22-02-2013, 03:49 PM
Hi , I m a maintenance HVAC Ltd
with serious problem _ Help pls
Centravac R22,RTHB255NLC00NWP000UNN3LF2LFV0Q0,
with fault: low oil flow
we have brush and clean evaporator and condenser,R22 as 600lbs, dif pressure switch check as 50psi, parameters as documentation
controls waters flow with electronic malet (25% up minimum)
starting, EXV slowly have to reduce near 3% to come on increasing DHT set point
generally as DST about 13C (set point15C) DST grow faster than opening EXV still about 3 or 5% _ then fault
remark, with big load 20 degree entering water it s runing
I ve qty of readings..
Thks