General Air Products Dry Air Pac DAP1000, Инструкция по установке, эксплуатации и обслуживанию

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Section 3 - Operation (cont’d)
The purge air enters the top of the offstream tower and travels downward to pick up the water molecules from the
desiccant as the pressure drops to atmosphere. The wet purge air exits the bottom of the tank and is vented to atmosphere
by way of the purge mufflers. The mufflers quiet the discharging air and also reduce the noise when the towers
depressurize. The mufflers are removable for cleaning with soap and water periodically. Cleaning will ensure no build up,
which will create back pressures in the tanks and decrease dryer performance. Both inlet and outlet of the tanks have
screens to retain the desiccant.
Clean mufflers if pressure on the regenerating tower is above 0 psig.
The exiting air then goes to the Air Maintenance Device. (See Start Up above for operating positions). From the Air
Maintenance Device the air goes into the final filter regulator. The air up to this point has been at 70 - 100 psig. When it
leaves the filter regulator it is reduced to system pressure.
The dryer must operate at 70 to 100psig to function correctly. The air maintenance
device regulator must be set and valved into the system.
3.2 Setting the Purge Pressure
The purge pressure set valve is located between the two tanks just over the top of the control panel. This valve is
pre-set at the factory. If it needs to be adjusted for any reason, the following list shows the correct set pressures.
Consult factory before setting purge pressure.
UNIT PURGE GAUGE TOWER GAUGE
DAP500
2
0 psig 80 psig
DAP1000 35 psig 80 psig
DAP2000 25 psig 80 psig
3.3 Coalescing Filter Operation
The coalescing filter protects the desiccant dryer from oil carryover from the compressor. The filter has a built in
differential pressure indicator with three color bands. Green is normal condition, yellow is warning that the element is going
to need to be replaced, and red indicates the filter is overdue for replacement.
The filter has a built in automatic drain, which in normal service will expel accumulated oil or moisture from the
bottom of the bowl. The drain can be tested by pushing up on the needle valve stem, which is in the mouth of the black
outlet nipple on the bottom of the filter.
Service kits are available as detailed below. Model and serial numbers are required when ordering service kits.
KIT# KSMB01
Compressor Intake Filter Element(s), Coalescing
Filter Element, Particulate After Filter Element
and Compressor Oil
KIT# KAMA01
Same as Kit # KSMB01 and full desiccant
charge for both dryer towers
1-800-345-8207
NOTICE
NOTICE
NOTICE