PAGE 4
PRINTED IN THE U.S.A.
INSTALLATION
SECTION 4
MAXIMUM WORKING PRESSURE
MODEL
AC-50 & AC-60
AC-70 THRU AC-110
AC-120 THRU AC-130
70
O
F
525 PSIG
450 PSIG
400 PSIG
300
O
F
460 PSIG
395 PSIG
350 PSIG
400
O
F
435 PSIG
370 PSIG
330 PSIG
FIGURE 2 FLEXIBLE HOSE DETAILS
WEIGHT
2.0 LBS
3.0 LBS
4.5 LBS
DIMENSIONS
A
12"
16"
18"
B
1" NPT
1-1/2" NPT
2" NPT
PART NO.
83-0735
83-0736
83-0737
HOSE
FH-1
FH-1-1/2
FH-2
If the aftercooler is to be installed in an existing piping system, clean
the piping to remove accumulated dirt, pipe scale, oil, and other
contaminants before installing the unit.
A properly sized pressure relief valve should be installed after the
compressor and before any block valves. The relief valve should be
installed in compliance with any applicable federal, state, or local
codes.
To isolate the aftercooler for maintenance, install bypass piping around
the aftercooler and separator (if installed). Reference Figure 3.
Connect the inlet piping to the top of the aftercooler. Make sure that
the flexible hose is properly installed before the aftercooler inlet.
Provide supports wherever necessary to prevent stress on the
aftercooler. Supports should be installed close to the inlet and outlet
manifolds. Use either overhead or stiff-leg type supports.
4.5 FREEZE PROTECTION
If the aftercooler is to be installed in a location where ambient tempera-
tures may fall below 35
o
F, heat tracing and/or insulation must be used
on the outlet piping to the separator, the separator, and the drain
piping. The aftercooler must be protected from the direct wind, i.e. a
roof and/or walls.
The aftercooler should be turned off when ambient temperatures fall
below 35
o
F.
FIGURE 3 RECOMMENDED INSTALLATION DETAIL
4.3 FLEXIBLE HOSE INSTALLATION
IMPORTANT
A FLEXIBLE HOSE MUST BE INSTALLED BETWEEN THE
COMPRESSOR AND AFTERCOOLER TO VALIDATE THE
WARRANTY ON THE AFTERCOOLER.
The flexible hose must be installed perpendicular to the direction of
vibration from the compressor.
If a flexible hose was not ordered with the aftercooler, one can be
ordered from your Van Air distributor. Figure 2 lists the hose required
for each aftercooler model.
4.4 PIPING INSTALLATION
CAUTION
ALL PIPING MUST BE ADEQUATELY SUPPORTED AND
ISOLATED FROM VIBRATION. EXCESSIVE STRESS OR
VIBRATION IN THE PIPING WILL CAUSE DAMAGE TO THE
AFTERCOOLER CORE.
TO ENSURE PROPER OPERATION, MAKE SURE THAT THE
INLET AND OUTLET PIPING ARE CORRECTLY CONNECTED
TO THE UNIT. REFERENCE FIGURE 3.
