Sullair DHL-150 - 4.3 OPERATION AND SWITCHING OFF

DHL HEATLESS REGENERATIVE DRYER SECTION 4
18
4.3 OPERATION AND
SWITCHING OFF
Maintenance personnel must wear
hearing protection while operating the
dryer. Each employee must select proper
PPD (Personal Protection Device)
hearing protector (earmuffs, ear canal
caps and earplugs) in order to prevent any
uneasiness that could cause dangerous situation for
him.
Operation:
• Pressurize the dryer slowly.
• Activate the on/off switch.
• Verify that the control panel is on.
• Wait for the first cycles of the inlet filter
drain or make the drain test manually.
• During the first two minutes both the towers
are pressurized
• Wait for the dryer to make some cycles
(there is an alternation of depressurization
from tower A to tower B).
Switching off:
• Check if the inlet filter condensate drain
works regularly.
• Stop the air flow.
• Depressurize the dryer.
• Deactivate the on/off switch.
NOTE
During the first days of operation, the
DewPoint is not ensured because the
adsorption material can contain humidity.
At the first start-up, or in case of start-up
after a long inactivity period or following
the maintenance operations, we recom-
mend using the dryer at a reduced nomi-
nal flow of 50% during the first two days.
NOTE
During the working of the dryer, both the
towers are cyclically depressurized in
order to be regenerated. The depressur-
ized tower is crossed from part of the
compressed air already dried, which will
be expelled outside. The noise of the
compressed air during the draining is
muffled by silencers.