Start-Up And Shut Down Procedures - Aircel AHLD E-Series Installation & Operation Manual

Heatless Regenerative Desiccant Air Dryer

START-UP AND SHUT DOWN PROCEDURES

Start-Up Procedure
At any point during the process of startup or shutdown,
you notice anything unusual; we recommend you refer to
the operation manual immediately. If you cannot find the
answer in the troubleshooting section, contact your Aircel
representative or the factory at once.
1. Ensure that the dryer is connected to a suitable
compressed air supply. Make sure that the pressure of
the supply is equal to the normal operating pressure of
the dryer.
2. Check to make sure the "shut-off" valves are closed and
that by-pass valve is open.
3. Close all manual drain/vent valves.
4. Slowly pressurize the dryer by gradually (slowly) opening
the inlet shut-off valve to the OPEN position.
5. When both towers of the dryer are completely
pressurized, check the complete system for possible air
leaks. Use soap and water to test all joints and fittings. If
any leaks are detected, immediately depressurize the unit
and correct the leaks.
6. Make certain that nay automatic condensate drain
isolation valves are in the open position so proper
condensate draining can occur.
7. When normal operating pressure is reached, switch on
electrical power (Turn switch to ON position).
8. With by-pass valve closed, open the outlet valve slowly to
allow air downstream.
9. When energized one of the towers should depressurize.
10. Check the operation of several cycles completely by
following the control panel display screen operation, the
panel lights on the electrical box, and the tower pressure
gauges to make certain the dryer system is operating as
displayed. Also refer to the how it works section, flow
diagram, electrical drawing, dryer control display screen
descriptions, and sequence of operation in this manual
for reference.
11. Check the drain valve for proper operation and discharge
of liquid (filters and separators, etc.).
12. Near the dryer outlet (APV) valve, check the control air/
pilot air regulator secondary pressure, the regulator
gauge should read 100 psig. Increase or decrease
regulator knob to achieve a 100 psig control air secondary
pressure reading.
13. Make certain the purge exhaust valves slowly open
within an 8 to 12 second time period, some adjustment
of the flow control valve attached to the actuator may be
required, after adjustment tighten down the locking collar.
14. Make certain a slight amount of air flow is felt at the end
of the EMS RH sensor sample cell exhaust coil tube (this
is normally located at the back of the dryer) adjust the
needle valve to give more or less flow.
15. Review the dryer system display screen shots (in this
manual) to make certain the parameters are set as
needed in the customer dryer.
16. Purge air flow is preset and not adjustable.
After the initial startup, the dryer operation is completely
automatic. To understand the details of the operation, we
recommend you use the how it works section, flow diagram,
electrical drawing, dryer control display screen descriptions,
and sequence of operation in this manual for reference.
Shut-Down Procedure
At any point during the process of startup or shutdown,
you notice anything unusual; we recommend you refer to
the operation manual immediately. If you cannot find the
answer in the troubleshooting section, contact your Aircel
representative or the factory at once.
1. Slowly OPEN the by-pass valve.
2. Slowly CLOSE the Inlet and outlet "shut-off" valves.
3. To depressurize the dryer after the Dryer is isolated. Turn
the power ON ... a purge exhaust valve will open and
the dryer system starts to depressurize, also the manual
vent valve on the outlet afterfilter can be opened to
depressurize the Dryer until the tower pressure gauges
read '0' psig.
4. Switch off electrical power after both towers have been
depressurized.
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