Parker SC80, Operator'S Manual

Page: 10 / 39

(9) Drain Control Settings. The DP5050-L series control panel will operate by
either a “Level Float” or “Timed” interval. If the dryer is equipped with a Level
Float (electrical connections to terminal J9), the drain will respond to the float
signal on demand to operate the drain. The duration the drain stays open will
be determined by the length of time it takes the fluid level to drop and rest the
float signal, plus a pre-set time of a few seconds after. The drain valve will also
operate automatically every 30 minutes (independent to the float signal). The
30 minute timed intercal setting can be adjusted down to 1 minute or raised up
to 60 minutes if desired. To adjust the drain, “Timed Interval” setting press the
SET Button twice. The value displayed will be the timed Interval setting. Use
the UP or DOWN Arrow to change the set point. Press the set button again to
return to dew point.
(10) Drain Open LED. Indicates that the drain valve is open.
11
(11) Air Inlet & Outlet PSI Gauges. Indicates that unit is pressurized. Unit
MUST be depressurized and bypassed before any service work is done on air
system. Excessive pressure drop (more than 5 PSIG) across dryer indicates
water may be freezing in the evaporator.