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“Oil-Less” Scroll Medical Air
Appendix A: Desiccant Dryer
A.5 Replace/Repair 4. Remove canister from manifold assembly,
being careful not to spill any desiccant.
WARNING: 5. Dispose of used desiccant into suitable
containers.
Ensure that the dryer and associated
pre-fi lter(s) and afterfi lter(s) are valve 6. Remove any blockage that may have lodged in
isolated and fully depressurized before the perforated screens.
attempting to remove or disassemble any 7. Replace canister O-rings. Set canister onto
subassemblies or components. Failure to manifold assembly.
do so may result in serious personal injury
and/or equipment damage. 8. Install the perforated screen into the bottom
of the canister.
9. Fill canisters with desiccant to one inch (1”)
A.5.1 Desiccant Replacement Procedure from the top of canister. Install perforated
screen.
WARNING:
CAUTION: DO NOT OVERFILL
Used desiccant material must be handled 10. Set spring retainer on top of perforated screen.
with special care. Desiccant is an Install tower over the canister. Install plain
adsorbent material. Used desiccant may washers and hex nuts. Tighten nuts in an
contain chemicals and/or gases that are X-pattern until chambers are snug against the
hazardous, toxic and/or fl ammable. It is manifold. Torque to 35 ft-lbs.
recommended that all used desiccants
be analyzed to determine content before A.5.2 Check Valve Replacement Procedure
disposal. Exercise proper care and
procedures during handling and storage 1. Remove the caps/plugs from the underside of
of used materials. All containers must the dryer block. See Figure A.3.
be properly labeled and disposed of in
accordance with local, state and federal 2. Using a 1⅛ deep well socket, remove the check
regulations. valves.
3. Replace check valve and cap/plug in dryer
1. Shut down dryer – close the inlet and outlet block.
isolation valves and turn off electrical power to
the dryer.
WARNING:
Desiccant towers contain springs which
may release potential energy upon
dismantle.
2. Remove hex nuts, washers and towers from
manifold assembly.
3. Remove spring and perforated screen from top
of canister.
Figure A.3 Dryer Block Check Valves
4107 9000 69.06 A-8
