Sahara Sahara-Pak HC-1260, Instruction Manual

Page: 21 / 136

INSTRUCTION MANUAL
Model HC
Reference 219 Rev 2
Page 21 of 46 06/20/2013
2.0.2 Description (continued)
2.0.2.6 Control Group
The complete operation of the Sahara-Pak HC dryer is fully
automatic and pre-programmed to shift drying vessels
continuously before the design water load can be reached
(breakthrough). With the dew point demand system, the dryer
will not switch towers until the drying tower is fully saturated.
The standard control is done with a PLC and operator interface
which operates the pilot air solenoids, which in turn actuate the
switching valves; all without operator attention.
The aforementioned "Primary Drain Failure" intermittent alarm,
optional "Fail-to-Shift" alarm, and optional "High Dewpoint"
alarm would be included in the dryer control group, if
purchased.
2.0.2.7 Instrument Panel
The standard instrument panel assures that operating
personnel are always informed of all phases of the Sahara-Pak
HC dryer operation. Dryer inlet, as well as cooler inlet and
outlet temperatures, are all monitored with temperature
transmitters that display temperatures on the panelview
screen.
Finally, an optional highly visible "Color Change" moisture
indicator makes clear at a glance the actual dew point
condition of the delivered air.