Van Air Systems D2 - Manual (Page 2)

PAGE 2
FIGURE 2 RECOMMENDED INSTALLATION
INLET
SHUTOFF
VALVE
D-2
BYPASS VALVE
INSTALLATION
The ability of a dryer to provide dry compressed air is
dependent on the correct location of the unit. Temperature and
pressure are the keys to selecting the proper location.
IMPORTANT
ALWAYS PROCESS AIR THROUGH THE DRYER AT THE
LOWEST POSSIBLE TEMPERATURE AND THE HIGHEST
PRACTICAL PRESSURE.
CAUTION
NEVER LOCATE THE DRYER IN AN AREA OF EXCESSIVE
HEAT. THE INLET AIR TEMPERATURE SHOULD NEVER
EXCEED 100°F.
OPERATING PRESSURE
More air can be processed through the dryer at higher pressures.
Locate the dryer at the highest practical pressure, but do not
exceed the maximum rated working pressure of 200 PSIG. Refer
to the flow capacity chart on page 1.
INLET AIR TEMPERATURE
The dew point of the outlet air is directly related to the inlet air
temperature. The lower the inlet temperature, the lower the dew
point of the outlet air. Determine the lowest ambient temperature
where the compressed air is used or where the lines are located.
Install the dryer where the inlet temperature will not be more than
10°F above the lowest system operating temperature, do not
exceed 100°F inlet air temperature.
Check markings on vessel head. Connect inlet pipe to side
marked "B" and outlet to side marked "A". Dryer must be
installed in a vertical and upright position with the bowl below
the head, as shown in Figure 2.
Fill bowl with desiccant (with the stem and grid assembly
inside) until the desiccant reaches the fill line (as shown in
Figure 1).
Place dryer bowl onto head.
Place clamp onto head and bowl and tighten. 4.
5.
6.
7.
PIPING AND ANCILLARY EQUIPMENT
Locate dryer as close as possible to equipment to be pro-
tected.
If large amounts of liquids are present in the air lines, install
a separator with drain valve ahead of the dryer.
Install bypass piping around dryer to facilitate servicing (Ref-
erence Figure 2). 1.
2.
3.
ADDING DESICCANT
Close dryer inlet and outlet shutoff valves. Slowly open drain
on bottom of bowl until vessel is completely depressurized.
Grasp bowl in one hand. Loosen clamp with other and slide
clamp down off bowl.
Twist bowl slightly and pull down off of head. The stem and grid
assembly must come loose from o-ring seal in head.
Add desiccant until the fill line is reached (Reference Figure
1).
Position stem on head and push bowl upward so bowl and
head meet.
Hold bowl in place, reinstall clamp and tighten. 1.
2.
3.
4.
5.
6.
START-UP
MAKE SURE THAT THE DRYER IS NOT SUBJECTED TO
SUDDEN SURGES. ALWAYS OPEN VALVES SLOWLY TO
PERMIT A GRADUAL EQUALIZATION OF PRESSURE
BETWEEN THE DRYER AND THE AIR SUPPLY LINES.
WARNING
OUTLET
SHUTOFF
VALVE
INLET
PORT B
OUTLET
PORT A
Close dryer inlet and outlet shutoff valves. Open bypass valve.
Close dryer drain valve. See Figure 2 Recommended Instal-
lation
Slowly pressurize dryer by opening dryer inlet shutoff valve.
Open dryer outlet shutoff valve slowly and close bypass valve. 1.
2.
3.
SHUT DOWN
Close dryer inlet and outlet shutoff valves. Open bypass valve.
Slowly open drain valve to depressurize dryer. 1.
2.