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ENM-3600-00
1.3 Optional Equipment
The following optional features can be
purchased to supplement the RRSHA Hot Air
Blower as needed.
1.3.1 Remote Snow Sensor
A second Snow Sensor can be ordered and
installed separately from the main housing
unit. The Remote Snow Sensor can be
mounted trackside or any other desired
location. Like the integrated Snow Sensor
attached to the top of the main housing
unit, the Remote Snow Sensor is a self-
contained unit incorporating a heated
precipitation sensing grid, temperature
probe, sensor electronics, and internal
relay.
The Remote Snow Sensor activates the Hot
Air Blower when precipitation occurs and the
temperature falls to a preset activation level
(default 38°F). After activating the RRSHA
Hot Air Blower, the Remote Snow Sensor
keeps the unit activated while precipitation
continues and temperatures remain below
the preset activation level. When
precipitation stops and/or the temperature
rises above the preset activation level, the
Remote Snow Sensor keeps the RRSHA Hot
Air Blower active for a preset time (default
two hours) to ensure complete ice and snow
removal. When the preset time has elapsed,
the Remote Snow Sensor de-activates the
RRSHA Hot Air Blower.
For information on installing the Remote
Snow Sensor, see
page
22.
Values that control when the Remote Snow
Sensor activates and de-activates the Hot Air
Blower are adjustable. For more information,
see
3.1 Adjusting Snow Sensor settings
page 26.
NOTE:
If the Remote Snow Sensor activates
the RRSHA Hot Air Blower,
1.3.2 Crib Heater
Crib Heater Mounting Hardware
In locations that experience heavy snowfall or
frequent blowing and drifting, a Crib Heater
provides additional heat to critical switch
components, such as switch rods.
Crib Heaters come in multiple sizes, from 4 feet
to 10 feet long. Each Crib Heater contains a
resistance-heating element within an
on
aluminum housing designed to go under the
switch machine rods. Vent holes designed for
air flow are placed face down towards the
ballast.
RRSHA Series Hot Air Blower User Manual
only that sensor can de-activate the unit.
If the Remote (Dispatch) Activation
feature is used, the remote switch cannot
de-activate the RRSHA Hot Air Blower if
the Remote Snow Sensor has activated
the unit. However, the remote switch can
activate the Hot Air Blower after it has
been de- activated by the Remote Snow
Sensor.
Fig. 134
Crib Heater
Fig. 145
NOTE:
For additional instructions on the
installation, operation, maintenance and
troubleshooting of Crib Heaters see
Spectrum Document number ENM-3585
11
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