Troubleshooting guide

8
CAUTION
TO MAINTAIN THE PROPER OUTLET DEWPOINT, THE DRYER MUST
RECEIVE THE PROPER AMOUNT OF PURGE AIR. IF THERE IS EXCESSIVE
BACK PRESSURE IN THE TOWER BEING REGENERATED, CHECK THE
PURGE MUFFLER AND PURGE PIPING. BACK PRESSURE IS INDICATED
WHEN OFF-LINE TOWER PRESSURE GAUGE READS HIGHER THAT 5 PSIG.
THE PIPING AND PURGE MUFFLER MUST BE KEPT CLEAN TO MAINTAIN
THE PROPER PURGE RATE.
WARNING
WHEN SERVICING PURGE MUFFLER AND PURGE SYSTEM,
DEPRESSURIZE BEFORE DISASSEMBLY. BACK PRESSURE CAUSED BY
DIRTY MUFFLER/PURGE SYSTEM CAN CAUSE INJURY SHOULD YOU
ATTEMPT TO DISASSEMBLY WHILE PRESSURIZED.
E. PURGE FLOW CALCULATION
To calculate Purge Air Flow required for your application, you must first complete the
formula refer to Purge Flow Calculation Chart below.
For gauge pressure (PSIG) we provide idea Purge Flow Calculation Chart that converts the
Purge Flow Meter reading from PSIG to SCFM. This chart allows you to calculate changes
in purge settings as operating pressure varies.
PURGE FLOW FORMULA
Inlet System Requirement = SCFM
Absolute Pressure (PSIA) = Gauge Pressure (PSIG) +
Atmospheric Pressure (14.7 PSI)
Regenerative Constant = 16.2 (allowing safety factor)
SCFM X 16.2 = Purge Air Flow (SCFM)
Abs. Pres.