Spec Sheet

Enclosed Scroll Air Compressor System
SEQ, SEP, SEH – 40-60 HP
Powerex • 150 Producon Drive • Harrison, OH 45030 • USA
P 1.888.769.7979 • F 513.367.3125 • www.powerexinc.com
01/2017
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prevent shocking of the desiccant bed prior to switching towers.
An integral purge saving control system shall be provided and shall
suspend the purge air loss during periods of low demand. When the
dryer is in purge control mode, the tower switching valves shall not
operate, and only one desiccant tower shall be on-line. Dryers that
connue to operate the switching valves on a xed cycle, while in
purge control mode shall not be acceptable. (Dryers ulizing purge
control require the oponal dew point monitor listed below.) Each
dryer is supplied with two stages of ltraon. The pre-lter removes
parculates and liquids and includes an element change indicator and
automac condensate drain. The 0.5 micron aer lter includes an
element change indicator. Dryers shall be powered through a separate
control circuit and not through the compressor controls.
Oponal Refrigerant Air Dryer
The refrigerated air dryers are non-cycling, direct expansion type,
using R-134 A refrigerant (CFC free). A hot gas by-pass system maintains
a consistent temperature at all load condions. Heat exchangers are
made of copper tube construcon and fully insulated. Dryers shall
have power on and high temperature lights, sucon pressure gauge,
internal 3-micron lter/separator with stainless steel bowl, and med
electric condensate drain. Refrigerated dryers are to be powered
from a separate supply, not through the compressor controls.
Oponal Dewpoint Monitor
NOTE: Installed on desiccant dryer.
The system-integrated hygrometer shall be equipped with an
LCD dewpoint display and high dewpoint alarm with dry contacts
for remote monitoring. The sensor shall include an auto calibraon
feature to ensure the accuracy of the dewpoint measurement.
Oponal Moisture Separator
The moisture separator shall be sized for the peak calculated
demand and shall include an auto oat drain to purge the collected
moisture.