Troubleshooting the SIT-6E Snow Sensor

Environmental Technology Inc. demands the most and the best out of the products it manufactures and distributes. In a less than perfect world, however, less than ideal situations occur.

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Do I need to supply the controller with a ground fault breaker?

by David Mays | Aug 04, 2011 |

APS-3C, Frequently Asked Questions, GIT-3A, ground, LCD-1, LCD-3, LCD-7, PD Pro

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2 Comments

When using a control or controller that does not include integral ground fault, using a ground fault breaker is required to provide protection for the heater tapes used with this product. Failure to do so will put the installation at risk for fire...

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When the system was installed the high temperature sensor was not installed, can I still make the unit work?

The high temperature sensor is intended for two purposes, either as a slab sensor when the EUR-5A is used for heating sidewalks, patios or driveways or for ambient air temperature when the unit is used for roof and gutter melt systems.

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Why doesn’t adjusting the High Temperature Limit dial turn the unit on?

The high temperature limit dial is used to set the maximum temperature that the unit will work at. When the High temperature limit sensor detects a temperature higher than what is selected on the dial it overrides the system and shuts it off. This...

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Why is my heater light flashing?

A flashing heater light indicates a missing or broken High Temperature Limit sensor. This sensor is required. The sensor is not polarized and must be connected to pins 1 and 2. Refer to figure 17 in the manual.

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Can I use the APS-4C to drive external contactors for more circuits?

No. Doing so will cause the GFEP circuit on the APS-4C to detect the inductive load of the contactor coil as ground fault and alarm the system every time the contactor is turned on.

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Is there a way to make the system come on with temperature only?

The APS C series systems are designed to turn on and off, as the weather requires heat to deal with snow or icing conditions. Although a thermostatic dry contact switch can be used to override the system on for temperature alone, is not recommended...

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What is the EMC light for?

by Chuck Gartland | Aug 02, 2011 |

APS-3C, APS-4C, Frequently Asked Questions, SC-40C

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EMC stands for Energy Management Computer, which can used to remotely monitor and control the APS C series ice melt controllers.

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How do I simulate a sensor call for heat to test my snowmelt/deicing system?

There are two basic way to test a system to ensure that the control(s) will work when snow and/or ice are detected.

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When my APS C series control panel was installed the high temperature sensor was not installed, can I still make the unit work?

by Chuck Gartland | Aug 02, 2011 |

APS-3C, APS-4C, Frequently Asked Questions, SC-40C

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2 Comments

The high temperature limit sensor is intended for two purposes, either as a slab sensor when the APS C series unit is used for heating side walks, patios or drives or for ambient air temperature when the unit is used for roof and gutter melt systems.

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