Page 7 – Van Air Systems MHL3-MHL50 User Manual
Page 7
Van Air Systems MHL-Series Desiccant Air Dryer Operations and Maintenance Manual
Page 7
SECTION 5 START UP PROCEDURE
BEFORE STARTING THIS DRYER, FOLLOW THE
INSTALLATION INSTRUCTIONS AND PROCEDURES
COMPLETELY.
DO NOT REMOVE, REPAIR OR REPLACE ANY ITEM ON
THE DRYER WHILE THE DRYER IS UNDER PRESSURE.
INITIAL START UPS
1.
Confirm that all piping and electrical connections are
proper.
2.
Shut off electrical power.
3.
If a bypass is installed around the dryer, open the inlet
and outlet isolation valves. Close the bypass valve.
WARNING - When operating this dryer without the
mufflers, use hearing protection.
4.
Wait approx. 20 seconds to equalize pressure in the
desiccant chambers.
5.
Turn on the electrical power. Dryer should start cycling.
6.
Verify purge cycle timing as described in Dryer Operation
section.
7.
Verify that a small amount of air is purging from the
moisture indicator. When sample air is dry, the silica gel
remains dark blue. If the sample air is moist, indicating a
problem, the color changes to light pink. At start-up the
moisture indicator may show pink, but it should return to
blue after 30 to 40 minutes of dryer operation.
SECTION 6 MAINTENANCE AND
REPAIR
WARNING - DO NOT REMOVE, REPAIR, OR REPLACE ANY
ITEM ON THE DRYER WHILE THE DRYER IS UNDER
PRESSURE.
BEFORE BEGINNING ANY REPAIRS, MAINTENANCE, OR
INSTALLATION WORK, VERIFY THAT THE POWER IS OFF
AND THE DRYER IS DEPRESSURIZED.
BEFORE WORKING ON THE DRYER OR RELATED
EQUIPMENT, ENSURE THAT ALL PERSONNEL HAVE
READ AND UNDERSTAND THE SAFETY AND OPERATION
INSTRUCTIONS IN THIS MANUAL.
PREVENTIVE MAINTENANCE SCHEDULE
This is a suggested schedule based on average dryer
conditions. As conditions such as dirty environment, humidity
conditions, ambient temperature, etc. change, the frequency of
the inspections may change.
Daily
1.
Inspect the dryer for proper operation.
2.
Inspect inlet filters and drains for proper operation.
3.
Verify proper inlet and ambient air conditions.
Weekly
1.
Check pop-up indicators on prefilter and afterfilter. If
indicator shows red, change filter element.
Semi-Annually
1.
Inspect entire assembly for loose connections, screws,
etc.
2.
Perform audible inspection of purge cycling and purge
flow.
3.
Visual inspection of exhaust area for signs of oil or
desiccant attrition.