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ENM-3600-00
4
Seasonal Maintenance
4.1 Pre-Winter Maintenance
4.1.1 Hot Air Blower Main Housing Unit
Inspect the unit's hinged cover door for damage that would prevent it from being shut
and locked.
If installed as Model Suffix "M", inspect (and tighten if necessary) the bolts
attaching the unit to the Height Adjustment Legs.
4.1.2 Circuit Panel
Verify the main power source to the RRSHA Hot Air Blower is off.
Disconnect the power wires coming into the main housing unit from the main breaker.
Open the main housing unit's hinged cover door and reconnect all wires coming from
the Wiring Box (or direct from the heating elements) to their respective terminal
blocks.
Reconnect the power wires coming into the main housing unit from the main breaker.
Close the main housing unit's hinged cover door.
Turn on the main power source to the RRSHA Hot Air Blower.
Verify the RRSHA Hot Air Blower has power by verifying the green LED on the Snow
Sensor is illuminated.
4.1.3 Manual Activation
Set the Blower Power switch to On.
Verify the RRSHA Hot Air Blower is activated by verifying the green LED on the Snow Sensor
is blinking.
Listen for the circuits to engage. For units that also power optional equipment, the
secondary circuit turns on after the primary circuit according to the secondary circuit's Delay
Timer setting.
Walk to the heaters and take the surface temperature to verify heaters are getting power
and are heating.
Leave the RRSHA Hot Air Blower activated for 10-15 minutes to allow the heaters to come
up to temperature and verify there are no GFI faults or heater malfunctions.
Verify the element resistance using a multimeter. Take measurements across two phases on
the load side of each element contactor. Refer to tables in Section 5 (Specifications). If the
results deviate significantly from these tables, this would indicate heater elements are open
or have short circuited and need replacement.
RRSHA Series Hot Air Blower User Manual
30
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