Thermon Fastrax, Installation & Operation Manual

Page: 3 / 12

3
B. EMS INSTALLATION
B.1 Mounting EMS Control Box
1. Mount the EMS control box in a convenient location
on, or next to, the heater.
B.2 Mounting Precipitation Sensor
1. Mount the ArcticSense precipitation sensor on the
sensor duct flange, where it will be exposed to snow
and be in the heated zone. Slotted mounting holes
facilitate attachment to the flange bolts in any of 2
position. Select the position that is most likely to be
exposed to drifting snow.
B.3 Mounting Rail Thermostat
1. 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.
2. Remove the four (4) Phillips screws, the cover, and
the plug from the hole in the rail temperature surge
protection box.
3. Pass the two (2) wires from the rail temperature
sensor through the hole, install the locknut and
tighten.
4. Insert, one each of the bared wires into the two
terminalks on the surge suppression circuit board,
and tighten. There is no polarity.