Page 56 - Select Specialty

"Oil-Less” Scroll Medical Air Medical Systems

Appendix A - Desiccant Dryer

A.3 Trouble Shooting (continued)

Problem Possible Causes Solution
Dew point Desiccant is contaminated. Shutdown and depressurize the dryer. Inspect
degradation The “white” desiccant beads the desiccant and replace if fouled. Inspect
may appear discolored and any existing pre-filter if fouling is noted.
dirty if contamination has
occurred.

Union or other Soap test the dryer outlet manifold and piping
piping/component leaks at downstream of dryer. Repair all leaks noted.
dryer outlet manifold or
downstream of dryer outlet
Back pressure on a Dirty or fouled purge muffler Switch off power and remove purge muffler
desiccant chamber and clean using an air nozzle, or replace.
during the
regeneration cycle. Outlet check valve leaking Replace check valve

NOTE: The presence of backpressure will result in insufficient regeneration followed by dew point degradation. An
off-line chamber’s pressure MUST be less than 3 psig throughout all regeneration cycles.

A-7