Van Air Systems D8 - Manual (Page 5)

PAGE 5
On a new installation, continue to drain all downstream traps for
several days (or until no water is evident) after dryer is installed. This
period is required to dry out any accumulated water in the com-
pressed air system. Once the water is removed, the downstream
traps should not need to be drained again.
3.2-B REFILLING THE DRYER WITH DESICCANT
During the VAN AIR drying process, the desiccant tablets dissolve
slowly. More tablets must be added to the supply when the top of the
bed drops to the sight window level (minimum level). Reference
FIGURE 5.
The desiccant consumption rate is dependent upon several factors,
such as inlet temperature, flow, pressure and the type of desiccant
being used . With average conditions, the desiccant will usually need
to be added only two to three times per year when the dryer is
operating one shift per day. However, until the actual usage rate is
determined, check the bed level monthly.
3.3 USING THE SIGHT WINDOW
WARNING
IF SIGHT WINDOW IS DAMAGED IN ANY WAY, REPLACE IT
IMMEDIATELY WITH VAN AIR PART NO. 26-0104 only.
REFERENCE SECTION 4.3.
To check the level of the desiccant bed, look into the sight window.
When the top of the desiccant bed is level with the sight window, the
desiccant supply has dropped to the minimum level. The bed must be
replenished to raise the bed level to the maximum level.
SECTION 3 OPERATION
SECTION 4 MAINTENANCE
4.1 DAILY PROCEDURES
After every 8 hour period of operation, drain accumulated solution from
the bottom of dryer. Open manual drain valve and allow the solution to
discharge from the dryer; then close the manual drain valve securely.
4.2 MONTHLY PROCEDURES
Check the level of the desiccant bed by looking into the sight window.
If the top of the desiccant bed is level with the sight window, the
desiccant bed must be replenished.
Check the operation of all equipment installed before and after the
dryer.
Check the afterfilter element condition. If the pressure differential
across the filter is high (6 to 9 PSID), replace the element.
Inspect the hatch cover for signs of corrosion and/or leaks. Replace
the cover and/or gasket if necessary.
4.3 REPLACING THE SIGHT WINDOW (P/N 26-0104)
WARNING
DEPRESSURIZE DRYER COMPLETELY BEFORE
REMOVING THE SIGHT WINDOW.
Open the bypass valve. Close the dryer inlet and outlet isolation valves.
If the bypass and inlet and outlet isolation valves were not installed,
shutdown the air system.
Using a pipe wrench, unthread the old sight window. Remove all pipe
sealant, rust or dirt from the coupling.
Apply a layer of pipe sealant to the threads of the new sight window.
DO NOT USE TEFLON TAPE. Tape may prevent the sight window
from threading into the coupling far enough.
4.4 ADDITION OF DESICCANT
WARNING
DO NOT REMOVE, REPAIR, OR REPLACE ANY ITEM ON THE
DRYER WHILE IT IS UNDER PRESSURE. DEPRESSURIZE THE
DRYER COMPLETELY BEFORE STARTING INSTALLATION AND/
OR MAINTENANCE PROCEDURES.
Open the bypass valve. Close the dryer inlet and outlet isolation valves.
If the bypass and inlet and outlet isolation valves were not installed, shut
down the air system.
Open the drain valve and allow the dryer to depressurize completely.
Remove the fill port.
Add the amount of desiccant tablets required to raise the supply to the
normal operating level or to maximum level (see FIGURE 5); then level
off the tablet bed.
Replace and tighten the fill port.
Reference Section 4.4 for estimated consumption rates and
refilling instructions.
IMPORTANT
Use VAN AIR desiccant only. Filling dryer with any other
material will void the warranty.