Van Air Systems FP-3 Kit - Manual (Page 2)

PAGE 2
FIGURE 2-A MOUNTING THE CONTROLLER
FIGURE 2-B MOUNTING THE THERMOWELL
SECTION 2 INSTALLATION
2.1 MOUNTING THE CONTROLLER
The controller should be mounted on the side panel near the outlet of the aftercooler.
Drill the pilot holes into the panel using a 1/8" drill. Reference Figure 2-A for dimensions.
Fasten the controller in place using the four (4) #8-18 x 3/4" long self-tapping screws supplied with the kit.
2.2 INSTALLING THE THERMOWELL AND SENSOR
A 1/2" NPT or larger connection in the system piping
between the outlet of the aftercooler and the inlet of
the separator is required for installing the thermowell.
If a connection is not available, a tee fitting of the
same size as the piping MUST be installed between
the aftercooler and the separator. Use pipe sealant
on all threaded pipe connections.
AC-50 & AC-60 Models only - Install a 1" NPT close
nipple into the tee fitting. Attach a 1" x 1/2" NPT
reducer to the nipple.
AC-70 thru AC-130 Models only - Install a bushing
into the side branch of the tee fitting to reduce the
connection size to 1/2" NPT.
Thread the thermowell into the bushing or reducer.
Place some heat sink compound into the thermowell.
Place the sensor into the thermowell and fasten it in
place using the clip supplied with the thermowell.
Reference Figure 2-B.
Remove the rubber plug from the hole in the controller
and Install the cord grip connector as shown in Figure
2-B. Push the sensor cable through the connector.
Twist the two (2) red wires together and wire the
sensor cable to the controller circuit board terminals
labeled SENSOR A as shown in Figures 2-E thru 2-H.
Note that the sensor wires are NOT polarity sensitive.
Tighten the grip nut on the connector.