PAGE 5
INSTALLATION
SECTION 4
FIGURE 3C SEPARATOR
D
1" NPT
1-1/2" NPT
E
1/8" NPT
1/4" NPT
MWP
(PSIG)
200
200
MAX
120
400
MIN
11
60
FLOW
(SCFM)
A
10.00"
17.00"
B
3.35"
6.70"
C
0.98"
2.00"
MODEL
S-10-AD
S-30-M
SEPARATOR
S-10-AD
S-30-M
AFTERCOOER
AC-65
AC-105 & AC-125
PART NO.
83-0751
83-0751
DRAIN
FD-1
FD-1
PART NO.
83-0744
83-0746
3.5 FREEZE PROTECTION
If the aftercooler is to be installed in a location where ambient
temperatures may fall below 38
o
F, heat tracing and/or insulation
must be used on the outlet piping to the separator, the separa
-
tor, 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 38
o
F.
3.6 SEPARATOR INSTALLATION
CAUTION
IF THE SEPARATOR DRAIN IS TO BE CONNECTED INTO
A REMOTE OR COMMON DRAIN LINE, MAKE SURE
THAT IT IS VENTED.
THE DISCHARGE FROM THE SEPARATOR MAY CON-
TAIN COMPRESSOR LUBRICANTS. COMPLY WITH ALL
REGULATIONS CONCERNING DISPOSAL OF SUCH
FLUIDS.
When the process air is cooled by the aftercooler, moisture
condenses and accumulates in the outlet of the aftercooler.
To efficiently remove this liquid from the air system, a
separator with a FD-1 float drain must be installed immediately
downstream of the aftercooler.
Install the separator as outlined in the Installation, Operation,
and Maintenance Instructions supplied with the component. If
a separator was not ordered with the aftercooler, one can be
ordered from your VAN AIR distributor.
3.7 ELECTRICAL CONNECTIONS
CAUTION
TURN OFF MAIN POWER SUPPLY BEFORE WIRING TO
THE AFTERCOOLER.
MAKE SURE THAT ALL USER SUPPLIED WIRING
IS PROPERLY SIZED TO HANDLE THE AMPERAGE
REQUIRED BY THE AFTERCOOLER AND ANY AD-
DITIONAL EQUIPMENT. ALWAYS COMPLY WITH THE
NATIONAL ELECTRICAL CODE AND ALL APPLICABLE
FEDERAL, STATE AND LOCAL CODES.
IF THE AFTERCOOLER IS TO BE INSTALLED OUT-
DOORS OR IN AN EXTREMELY HUMID ATMOSPHERE,
MAKE SURE THAT ALL WIRING AND COMPONENTS
ARE PROPERLY RATED.
VERIFY THAT THE POWER SOURCE MATCHES THE AF-
TERCOOLER ELECTRICAL REQUIREMENTS BEFORE
MAKING ANY CONNECTIONS. REFERENCE MOTOR
DATA TAG FOR INFORMATION.
TO PREVENT POSSIBLE ELECTRICAL SHOCK, IT IS IM-
PORTANT THAT THIS UNIT IS PROPERLY GROUNDED.
The aftercooler electrical requirements are listed on the
equipment data tag and in Figure 2. If there are any
discrepancies between the data tag and Figure 2, use the
information on the tag.
Remove the cover from the electrical junction box on the after
-
cooler motor. Using the wiring diagram on the motor as refer
-
ence, make the necessary wiring connections. Several ways
to wire the unit are listed below. Make the connections for the
pertinent application(s).
1. DEDICATED POWER SUPPLY AND DISCONNECT
Install a properly sized fused disconnect before the
aftercooler. Make the necessary wire connections and re-
install the junction box cover.
2. INTERLOCKED WITH COMPRESSOR MOTOR STARTER
The aftercooler can be interlocked with the air compressor
starter. This allows the aftercooler to operate only when the
air compressor is operating.
If a set of auxiliary, normally open contacts is available on the
air compressor magnetic starter, make necessary wiring con
-
nections from the contacts to the aftercooler.
If a set of auxiliary contacts is not available, use a properly
sized contactor. Wire the contactor's holding coil in parallel
with the air compressor starter holding coil. Make the neces
-
sary wiring connections from the contactor to the aftercooler.
3.7-1 FAN MOTOR ROTATION
The rotation of the fan motor(s) is important. Units with 3
phase power should be checked for proper rotation after
installation.
Energize the unit. Observe the rotation and air flow direction.
referece Section 2.2 for air flow direction. If the air does not
flow in the proper direction, turn off the unit and switch two of
the main power legs.
