Fuelstretcher Technical Specification

General Features

• Controls up to 4 boilers on the same header or only 2 boilers if Hi – Lo burners and controls are used.
• Self-tuning – no programming – no user adjustment needed.
• Manual override key for servicing and fault diagnosis.
• Simple electrical installation by qualified electrician - entirely contained within boiler house – no outside sensors required.
• No fuel or water pipe intrusion needed.
• Provides optional control of HWS storage temperatures for Plant Room calorifiers.
• Connects to burner circuit through main boiler panel or directly on to thermostats and/or Boiler Main Panel Control Circuits or BMS enabling relays.
• Complies with all boiler manufacturers’ operating requirements.
• 'Fails safe'.
• LED Displays - Power - Boiler/Burner enable - Override ( Flashing )

Technical Specification

Power Supply (Must be permanent)	230VAC +15%/-18% 50/60HZ
Dedicated Full Disconnect	1 amp fused spur
Relay Outputs	4 x SPNC volts-free contacts
Relay Contact Rating	240VAC, 3.5A Inductive
Power Reserve (battery back-up)	6 hours minimum
Enclosure Rating	IP65 (IEC529/DIN40050)
Max Ambient Temp	45 degrees C
Overall Dimensions	315W x 118D x 260H (excluding cables/glands)
Sensor Type	Thermistor - resistance 30000 ohms@ 25°C
Sensor Cable Length	30 metres max