Fastrax Hellfire 900, Installation, Operation & Maintenance Instructions Manual

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4. Rail Thermostat
Mount the rail thermostat on the field or gage side of
the stock rail ahead of the points and tie duct, as shown.
Select a location shaded from the sun. Provide strain relief
in the cable, by leaving adequate slack, as shown, to allow
for rail pumping.
Remove the yellow shim washers when installed on 115 lb rail
or lighter. Loosen the two mounting bolts and attach the rail
thermostat to the rail flange by tapping it on with a hammer.
Once in place tighten mounting bolts to maximize grip.
4.1 Remove the four (4) Phillips screws, the cover, and
the plug from the hole in the rail temperature surge
protection box.
4.2 Pass the two (2) wires from the rail temperature
sensor through the hole, install the locknut and
tighten.
4.3 Insert, one each of the bared wires into the two
terminals on the surge suppression circuit board,
and tighten. There is no polarity.
4.4 Replace the cover, and tighten the four (4) Phillips
screws.
4.5 Connect the surge isolator two pin connector with the
mating plug located inside the electrical component
area, hanging immediately under the FSR.