18
HB Series Desiccant Dryer Models 150-8000
ingersollrandproducts.com
11.0 MAINTENANCE AND SYSTEM CHECK
11.2.2
FLANGED FILTERS:
STEP 1 - Using
a 2" socket with
an extension,
carefully loosen
element.
STEP 2 -
Remove old
element from
filter housing.
STEP 3 - Install
new element by
carefully
inserting
element in top
plate.
STEP 4 - Hand
tighten element
in place until
element o-ring
contacts top
plate.
STEP 5 - Using
a 2" socket with
an extension,
tighten element
one half turn.
DO NOT OVER-
TIGHTEN.
STEP 6 -
Repeat
procedure as
required to
replace all
elements.
11.3 MUFFLER CHANGE-OUT PROCEDURE
• Turn control power off per shutdown procedures described in Section 10.7.
A
WARNING
To avoid injury, depressurize dryer before performing any service
• Once the dryer has been depressurized, replace the muffler.
• Follow normal start-up procedures as described in Section 10.
11.4 NO-LOSS DRAIN VALVES
Periodically clean all no-loss drain valves. Cleaning can be
accomplished by removing the no-loss drain, removing the mufflers and
removing the valve bodies from the manifold. Check and replace o-rings
as necessary. If the no-loss drain valves fail to operate, check the
following:
• Control Circuit - Verify that the no-loss drain is receiving electric
current.
• Burned out no-loss drain coil.
• High/low voltage - Voltage should be +/- 10% of nameplate readings.
• No-loss drain valve leaking - Disassemble, clean and repack or
replace.
11.5 PILOT OPERATED ACTUATOR
Should the actuator fail to rotate, disconnect the pilot lines to check if the
actuator is receiving pilot pressure.
If the actuator is receiving pressure:
• Verify that control pressure is 75 psig min.
• Ensure the inlet valve is not plugged.
11.6 DESICCANT CHANGEOUT PROCEDURE
A
WARNING
To avoid injury, depressurize dryer before performing any service.
A
CAUTION
Be sure to wear respiratory protection during the draining and filling
process to minimize inhalation of desiccant, as desiccant will produce
dust during this procedure.
A
NOTICE
Each dryer is shipped with a desiccant sample kit to allow the
desiccant to be sent for analysis. This kit can be used to have the
condition of the desiccant verified by laboratory analysis. Please follow
the instructions found in the kit.
• Desiccant dryers are furnished with fill and drain ports on each
desiccant tower. Remove the caps on both ports.
• To assist in getting the desiccant to flow from the tower, insert a small
rod in to the drain port as necessary. This may be required as the
desiccant is packed into the towers which may interfere with the
desiccant flow from the towers.
• Retainer screens, located at the inlet and outlet piping connections of
the tower, are removable on all models. It is suggested that these
screens be removed and cleaned at the time of desiccant changeout.
These screens can be accessed by disconnecting the upper and lower
manifolds from the dryer towers.
• After cleaning the retainer screens, replace screens and reattach the
outlet port plug.
• With the fill port plug removed, fill the dryer tower with the appropriate
grade and size desiccant. The level and grade of the desiccant should
be consistent with the Desiccant Fill Chart.
A
CAUTION
Desiccant quantity, positioning and grades must match the
corresponding values in the Desiccant Fill Chart. Failure to do so may
result in poor dryer performance.
• Once the towers have been filled, replace the fill port plug on each
tower.
• Any connections disturbed in the desiccant changeout process should
be leak tested prior to re-commissioning the dryer.
120.26 Dryer - Operation, Installation, Maintenance Manual, and Parts
