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New line of Heat-Trace controls

by | Aug 8, 2017 | Featured

This past July Environmental Technology released its new line of microprocessor-based heat-trace controls, replacing its already successful SST line which has been a trusted industry standard since 2011. The new GPT and FPT heat-trace controls were created with input...

Can the APS activate on temperature only?

by | Jul 26, 2017 | APS-C Series FAQs

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 only, is not recommended since it will reduce...

External contactors used with the APS-4C?

by | Jul 26, 2017 | APS-C Series FAQs

No, using external contactors will cause the GFEP circuit on the APS-4C to detect the inductive load of the contactors coil as ground fault and alarm the system every time the contactor is turned on. In order to increase the size of the application, a SC-40C satellite...

Flashing supply light.

by | Jul 26, 2017 | APS-C Series FAQs

A flashing supply light indicates a missing or broken High-Temperature Limit sensor. This sensor is required to make the APS-C series controller to work. It is required on all of the APS-C series controllers. The sensor is not polarized and must be connected to pins...

Delay between SC-40C and APS-4C?

by | Jul 26, 2017 | APS-C Series FAQs

Why is there a delay between when the APS-4C turns on and when the SC-40C comes on? This delay between the APS-4C and the SC-40C is programmed into the system in order to reduce surge current. When the heaters are turned on they will have a large inrush of current for...

Snow light on SC-40C stays on longer than APS-4C

by | Jul 26, 2017 | APS-C Series FAQs

The snow light stays on longer for the SC-40C than the APS-4C because the APS-4C gets its command from an actual snow sensor where the SC-40C’s get their command from the APS-4C. When the snow sensor’s moisture grid dries out, it no longer sends a snow present command...

Is a snow sensor required for a SC-40C?

by | Jul 26, 2017 | APS-C Series FAQs

No, the SC-40C does not use a snow sensor, it is completely controlled by the attached APS-4C. However, the SC-40C does require the High-Temperature sensor Thermistor to be connected (or bypassed with a 470K-ohm resistor) in order for the unit to operate. The SC-40C...

Temperature sensor was not installed

by | Jul 26, 2017 | APS-C Series FAQs

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