Controller with active frost protection for 3-point actuator
Controller intended for control of valve actuators in water-heated systems. It has a built-in room sensor and can be used for control of supply air temperature or room temperature, with or without cascade control. The controller has built-in active frost protection with two alarm relays and automatic heat maintaining function during shutdown.
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Specifications
| Supply voltage | 24 V AC ±10 %, 50/60 Hz |
|---|---|
| Power consumption | Max. 5 VA |
| Control signal (output) | 3-point floating control, 24 V AC output (heating) |
| Sensor inputs | Three 0...30°C (the sensor determines the range (NTC sensor)) |
| Setpoint | 0...30°C |
| Minimum limit | 0...30°C (not active for single sensor control) |
| Cascade factor (CF) | 1…15 |
| Frost alarm setpoint | 5 °C |
| Shutdown mode setpoint | 25°C |
| Fan relay | Breaking contact for fan contactor interlock if a frost protection alarm occurs. 230 V AC, 2 A. |
| Alarm relay | Change-over contact for alarm indication if a frost protection alarm occurs. 24 V AC, 2 A. |
| Mounting | Wall |
| Dimensions | 93 x 153 x 40mm |
| Protection class | IP20 |