USER MANUAL
Series HC
Reference No. 145 Final Rev 5
Page 25
September 2004
SECTION 3:
(Continued)
3.1.1
Pressurizing dryer
(Continued)
•
When pressurizing is complete then fully open the system outlet valve to
place the equipment in service.
•
Verify the system inlet pressure and temperature are at the design operating
levels.
3.1.2
Energizing dryer controls
•
Turn ON-OFF switch to the ON position.
•
A Micrologix programmable controller with individual input/output modules
controls the dryer cycle. A copy of the program complete with a full listing of
inputs, outputs, internal coils, timers and counters is included later in this
manual. This should be used as a reference guide to ensure dryer is cycling.
A manual mode is included in the dryer program to allow for fast cycling to
verify the operation of the dryer.
While dryer is in the stripping mode for either chamber, the regeneration flow
setting should be checked. The stripping flow valve should be set at 1.5 turns
open at start-up and adjusted as necessary to maintain the specified
dewpoint. The pressure gauge on the regenerating tower should not exceed
10 psig.
Warning!
Failure to correctly set the stripping flow can lead to
improper regeneration of the desiccant bed, resulting
in a dewpoint failure when that chamber is returned to
service.
It is recommended that the operational program of the dryer and the
wiring schematic be studied before operating the dryer.
NOTE
:
If the DPDS (Dewpoint Demand System) option is purchased,
reference the DPDS Installation and Operating Guide for
instructions.
