Van Air Systems ID35 - Manual (Page 3)

PAGE 3
2.2-E DESICCANT INSTALLATION
IMPORTANT
This dryer was shipped WITH the desiccant installed.
See Section 3.3 of this manual for desiccant replacement.
SECTION 2 INSTALLATION
FIGURE 3 RECOMMENDED INSTALLATION DRAWING
NOTE:
ITEMS CALLED OUT IN THIS DRAWING
ARE NOT SUPPLIED WITH THE DRYER.
REFERENCE FIGURE 1 FOR ITEMS
INCLUDED WITH DRYER.
SECTION 3 OPERATION
3.3 REPLACING THE ADSORBENT DESICCANT
Close the inlet and outlet isolation valves (if installed).
Slowly open the depressurization valve to completely depressurize the
unit.
Remove the desiccant drain plug from the bottom of the vessel and
drain the old desiccant.
Replace the drain plug. Use pipe thread compound as needed.
Remove the fill port plug from the top of the vessel.
Fill the vessel with adsorbent desiccant. It takes approximately 8
pounds of indicating silica gel to fill the vessel.
Replace the fill port plug.
Start up the dryer per section 3.1.
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.
When using indicating silica gel, look into the sight window to check the
color of the desiccant bed. Pink silica gel is moist and blue silica gel is
dry. Replace the silica gel when the sight window shows pink.
3.1 START UP PROCEDURES
Make sure all isolation valves are closed.
Pressurize the system.
SLOWLY open the inlet isolation valve to bring the unit up to line
pressure.
SLOWLY open the outlet isolation valve to put the unit on stream.
If the vessel was installed without isolation valves, SLOWLY pressurize
the air system.
CAUTION
Make sure that the dryer is not subjected to sudden flow
surges. Always open valves slowly to permit gradual
equalization of pressure between the dryer and the air supply
lines.
3.2 OPERATING THE DRYER
On a new installation, 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 compressed air system. Once
the water is removed, the downstream traps should not need to be
drained again.
If silica gel desiccant is used in the vessel, it should be replaced when
the color in the sight window changes. Pink silica gel is moist and blue
silica gel is dry.
If other adsorbents are used, they should be replaced on a scheduled
basis, or when downstream measurement equipment indicates it.