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

Страница: 9 / 19

Section 5 - Desiccant Replacement
NOTE: You will need the following in order to service the unit:
Annual Service Kit - "General" part number: KAMA01
1. Close the outlet valve of the unit and turn the power to the unit off.
2. Depressurize the unit completely by opening the petcock on the bottom of the receiver and checking the pressure
gauges to ensure all air is removed. If air remains in the desiccant tanks, pull on the relief valve rings to depressurize the
tanks.
All pressure must be out of the unit prior to working on the unit.
3. The tanks have separate desiccant fill and drain ports at the top and
bottom.
4. Once the pressure has been removed from each tank, remove the
lower (drain) port plug. Desiccant will drop out of the drain port. It is
easiest to vacuum the desiccant out with a shop vac; however, the
desiccant will drop out of the tower. You may have to probe the outlet with
a thin probe in order to keep the desiccant from jamming together at the
port. The desiccant is white in color; yellow means the desiccant has oil
on it.
5. Ensure that all desiccant is removed from the tower. Replace the plug
ensuring the threads are cleaned and re-doped with thread sealant
before replacing.
CHECK the condition of the lower desiccant. As flow is upward through
the bed, the lower desiccant will see any major contaminants and any
carryover from the inlet filter if this has not been serviced correctly. Oil on
the lower desiccant means that the filter element has been over
saturated allowing oil to be carried over into the desiccant bed.
CHECK the filter drain and element before putting the new desiccant into
the towers.
Consult the factory if any oil is in the
towers.
6. Remove the upper plug from the fill port.
7. Using "General" part number 34006-50, refill the tower with new, white desiccant.
Refer to table at right for total amount of desiccant required for both towers.
Only add desiccant beads to towers when refilling. Avoid adding chips and dust, which
may be in the bottom of the bag of desiccant. Chips and dust can clog inlet and outlet
tower screens, lowering dryer performance.
8. Reinstall the fill port ensuring that you clean the threads and re-dope prior to installation.
1-800-345-8207
WARNING
NOTICE
NOTICE
A
B
(A) Fill Port (B) Drain Port
(apply procedure to both tanks)
Model Desiccant Required
DAP500 25.5 lbs.
DAP1000 25.5 lbs.
DAP2000 37.8 lbs.