ETI Snow Switch EUR-5A

The EUR–5A Snow Switch provides automatic control of a snow and ice melting system. It includes an interface for environmental sensors, heater contactors, and a building energy-management computer (if present). A remote-control panel is included to supplement the front panel controls.

The EUR–5A is compatible with all ETI snow and ice sensors including the CIT-1 aerial sensor, GIT-1 gutter sensor, and the SIT-6E pavement sensor. The EUR-5A also includes a High Temperature Limit Sensor for maximum energy efficiency.

The EUR–5A accommodates up to six environmental sensors. Using at least two environmental sensors improves system performance through superior coverage. When multiple sensors are connected, any one of them detecting snow or ice conditions will signal for the heating process to start.

When snow or ice is no longer detected by the environmental sensors, the heater hold-on time begins. During hold-on, heater operation continues for a user-adjustable time interval from 0 to 10 hours. The hold-on timer continues heating for this set amount of time to ensure complete melting and sufficient drying to prevent re-freezing.

The EUR–5A includes an adjustable high-temperature limit function. The high temperature limit can save energy by turning the heat off when the temperature is high enough for natural melting to occur. The high temperature limit is also useful in systems using MI cable and other constant-wattage heater cable to prevent unnecessarily high temperatures and excessive energy use. This feature can be overridden when using self-limiting heaters.

The EUR–5A comes with an RCU-3 remote control unit that can be mounted in a convenient place where an operator can monitor conditions and adjust the system operation accordingly.

The EUR–5A provides an interface that can communicate with a building’s energy management computer (EMC) system. The EMC interface provides dry switch contacts for communicating system status and inputs to allow the EMC to override the EUR-5A.

The EUR–5A operates from a 24-volt AC NEC Class 2 power source. A 24-volt control transformer is included for use in installations with 120 volt AC power. Since the EUR–5A is an NEC Class 2 device, it usually requires a customer supplied auxiliary relay for operating the heater control contactor.

FEATURES & BENEFITS

• Multiple sensor capability
• Remote control included
• Building and energy management computer interface
• Adjustable heater hold-on timer
• Local and remote heater toggle switches
• High ambient temperature limit
• NEC Class II operation
• 35 MM DIN rail mounting
• Energy efficient automatic operation
• Wide range of applications
• Electric panel location