Envirostat FP4E Controller

Envirostat FP4E 4kW

Envirostat FP4E 4kW Controller

The Envirostat FP4E 4kW provides protection for stock and equipment susceptible to low-temperature damage.


The Envirostat FP4E controller provides energy-efficient protection against damage caused by low temperatures, frost and damp. It can either be used on its own or in parallel with the CC3 4kW controller to provide a combination of automatic 24 hour frost protection and comfort warmth when an area is in use. The FP4E features a soft-start circuit that prolongs the operating life of the heaters and prevents any risk of nuisance tripping at the MCB caused by inrush current. It will bring the heaters on only when it is essential to raise the temperature for frost-protection duties. In addition to working with quartz halogen infrared heating, the FP4E works with trace heating installed to protect pipework. Supplied with a thermistor temperature sensor on a 2m long lead. The control set point is adjustable from -10°C to +10°C.

* also compatible with Infreso P,S & T 4kW controllers.

Connect the mains supply and load to the controller using appropriately sized round section cable. Position the sensor to measure the air temperature where required, or use cable ties to fix the sensor to a pipe etc. Set the set-point temperature dial.

Alternative Options available (POA):
• Temperature range 0°C to 20°C
• Reverse logic output for turning plant off at low temperatures
• Version with LED alarms for critical applications


Electrical supply: 230Vac ± 10% 50 Hz
Switching capacity: 4kW max
Load current: 20A max
Temperature range: -10°C to 10°C
Temperature accuracy: 1°C
Quiescent power consumption: 15mA
Soft start duration: 1 second
Supply terminal connections: 0.2 to 6mm² rising clamp
Cable entry glands: 8mm Ø (Note: cable MUST be round to ensure IP rating)
Ingress Protection: IP65
Built-in sensor: Encapsulated 10kW NTC thermistor probe, 2m long
Sensor monitoring: Open or short circuit – unit shuts down
Sensor mounting: To secure to pipe etc., use appropriately sized nylon cable ties
Sensor terminal connections: 0.1 to 1.5mm² Rising clamp
Sensor mounting: To secure to pipe etc., use appropriately sized nylon cable ties
Enclosure dimensions: 95 x 55 x 130 mm (wdh)
Other: Standard F-type quick-blow fuse or circuit breaker (MCB ‘type ‘B’- rated at 20A Max.) recommended for ‘in line’ protection.