Sullair SD-1050 Series, Руководство пользователя

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USER MANUAL
Models SD-820 to SD-1710 with DDS
Rev 04 – October 2005
10
When sized correctly, the Sullair type SD air dryer with DDS is designed to provide a
specific pressure dewpoint performance (generally -40°F (-40°C)) at worst-case
operating conditions (maximum flow at lowest pressure and highest inlet temperature).
The regeneration purge flow rate required for the dryer is adjusted to achieve that
dewpoint based on those conditions.
For example, for dryers operating at 100 psig (690 kPa) and 100°F (38°C), the purge
flow rate is approximately 15% of the specified maximum inlet flow. Dryers operating
under less severe inlet conditions will introduce a reduced humidity load. The DDS
controls have been factory programmed to monitor the dryer outlet dewpoint so that
regeneration will only begin when low desiccant performance registers.
Sullair SCH high-efficiency prefilters and SCR reverse-flow afterfilters are designed to
remove solids, oil and water condensate from compressed air and other neutral,
compressed gases. These filters provide high flows and low differential pressures.
Solids are filtered out by impact or by the effect of inertia, whereas oil particles and
drops of moisture are filtered out by the effect of coalescence. Contaminants collect in
the bottom of the filter vessel and are drained either automatically or manually.
Filters are provided separately unless the 3-Valve Bypass option has been purchased
(see paragraph 1.2).
3.2 OPERATOR CONTROLS
This adsorption dryer includes a Dewpoint Dependent Switching system that monitors
the dryer outlet dewpoint performance to set the optimum chamber changeover cycle
for desiccant regeneration.
The operator electrical control panel features the following indicators/controls:

Dryer nameplate – the nameplate information identifies your dryer

Three-way selector switch on the left side of the operator control panel:
o
DRYER OFF
o
DRYER ON
o
DDS ON.

Digital operations status display (see figure 2) used for system monitoring:
o
ECONOMY CYCLE light emitting diode (LED) – lit when DDS is on