by ETI Staff | Aug 2, 2011 | Frequently Asked Questions
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 function can be used...
by ETI Staff | Aug 2, 2011 | Frequently Asked Questions
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.
by ETI Staff | Aug 2, 2011 | Frequently Asked Questions
The difference is the step down transformer that provides the power for the internal circuitry. On the APS 277 single phase the transformer is 277 VAC to 24 VAC and you will note that its primary winding is connected to the top and middle poles on the contactor. On...
by ETI Staff | Aug 2, 2011 | Frequently Asked Questions
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. The APS-3C is designed without an internal GREP circuit so it will work with external...
by ETI Staff | Aug 2, 2011 | Frequently Asked Questions
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 since it will...
by ETI Staff | Aug 2, 2011 | Frequently Asked Questions
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 a few seconds. If all the heater circuits came on at the same time the inrush...
