Van Air Systems FD400-FD1600 blast-pak - Manual (Page 3)

PAGE 3
SECTION 4 OPERATION
5.1 DRAIN VESSEL DAILY
Drain the vessel by opening the drain valve and allowing the solution
to discharge; then close the drain valve completely. The accumulated
solution must be drained after every 4 to 8 hours of operation. An
optional pneumatic drain valve can be installed to drain the vessel
automatically as needed.
SECTION 5 MAINTENANCE
IMPORTANT
The drain solution may contain lubricants. Comply with all
applicable regulations concerning the disposal of these
chemicals.
5.2 CHECK DESICCANT LEVEL BEFORE OPERATION
Look into one of the sight windows. If light can be seen through the
opposite sight window, the desiccant supply must be replenished to
ensure dryer performance.
5.6 ADDING DESICCANT
Shut down the air system and open the drain valve to allow the dryer
to depressurize completely.
Loosen the nut on the hatch cover.
Push on the hatch cover. If the vessel is depressurized, the cover will
unseal. Once the seal is broken, tilt the hatch cover and remove it
from the dryer.
Add the amount of desiccant tablets required to raise the supply to
the maximum operating level; then level off the tablet bed.
CAUTION
Make sure the desiccant level is below the screen on the
outlet pipe.
Do NOT overfill the vessel. Adequate space must be left
to allow the hatch cover to be installed.
The dryer may require draining on a more frequent basis on
humid days. If a pneumatic drain valve is installed on the
dryer, it will drain automatically as needed.
IMPORTANT
The use of other than Van Air desiccant will void the
warranty on the Blast Pak.
WARNING
IF THE SIGHT WINDOWS ARE DAMAGED IN ANY WAY,
THEY MUST BE REPLACED IMMEDIATELY WITH VAN AIR
PART NO. 26-0104 only.
CAUTION
If the dryer is not drained regularly, it may become
flooded and the accumulated liquid may enter the air
system and cause damage to downstream equipment.
4.4-B REFILLING THE DRYER WITH DESICCANT
During the drying process, the desiccant tablets dissolve slowly.
The desiccant consumption rate is dependent on several factors,
such as inlet temperature, flow and pressure. To check the level
of the desiccant bed, look into one of the sight windows. If light can
be seen through the opposite sight window, the desiccant supply
must be replenished to ensure dryer performance.
Reference Section 5 for refilling instructions and estimated
consumption rates.
Verify that regulator pressure is set as shown on page 1 of this
manual to maintain 1725 rpm fan speed to ensure proper
aftercooler performance.
4.4 OPERATION
The simple design of the single tower dryer allows for easy
operation. The dryer requires two procedures to ensure peak
performance.
Check the operation of all equipment installed before and after the
Blast Pak.
Inspect the hatch cover for signs of corrosion and/or leaks. Replace
the cover and/or gasket as necessary.
5.3 CHECK OIL LEVEL IN LUBRICATOR
Verify that there is sufficient amount of oil in the lubricator and add
oil as needed. See section 6 for oil part number.
5.4 CHECK FILTER IN FRL
Replace filter as needed. See section 6 for fliter part number.
5.5 CLEAN AFTERCOOLER CORE
The core should be cleaned regularly. Accumulation of dirt or other
contaminants such as oils will greatly reduce the efficiency of the
aftercooler.
Normal accumulation of dirt can be removed by blowing the core off
with compressed air. If the core becomes contaminated with oil-
laden particles, it can be steam cleaned. Clean with extreme care
as the aluminum fins can be easily damaged.
Inspect the hatch cover and sealing surface. If there is any damage,
replace the cover. Replace the cover every 5 years regardless of
condition. The gasket should be replaced every time the hatch cover
is removed or at least once a year.
Check the sealing surface of the opening. If it is contaminated with
dirt or rust, it must be cleaned before installing the hatch cover. A
contaminated surface may prevent the gasket from properly sealing.
Install the filler hatch cover and a new gasket. Tighten the nut on the
hatch cover until it is snug. Overtightening will cause damage to the
nut. The cover will seal when the vessel is pressurized.
Start up the dryer following the procedures in Section 4.3.
Amount of desiccant required to fill from sight window to
maximum fill level:
DRY-O-LITE
150lb.
250 lb.
250 lb.
400 lb.
MODEL
FD-400
FD-800
FD-1200
FD-1600
4.4-A DAILY DRAINING
The accumulated desiccant and water solution in the bottom
of the dryer should be drained frequently. If a manual drain
valve is installed on the dryer, it must be opened at least
once every 4 to 8 hours to drain the dryer.
5.7 ESTIMATING DESICCANT USAGE
The ANNUAL DESICCANT CONSUMPTION RATE table is a guide
to estimate the desiccant usage for your installation.
The consumption rate is an approximation of how much
desiccant will be added over a period of one year.
The figure is an average and may vary depending upon your actual
conditions (i.e. 24 hour operation, higher inlet temperature, excessive
liquid water content, contaminants etc.)