Kromschroeder IFS135B-3/1/1T (84344500) burner control unit

Kromschroder IFS135B-3/1/1T 84344500 automatic burner control units are suitable for the ignition and control of gas burners in gas firing installations of all types. Range of application according to EN 746-2. For the flame control by means of ionization probe or UV-cell. With ionization control, a grounded main is required. Kromschroeder IFS135B-3/1/1T 84344500 control boxes are EC type tested and certified pursuant to the Gas Appliances Directive (90/396/EEC) in conjunction with EN 298.

Krom schroder 84344500 IFS135B-3/1/1T automatic gas firing device technical data

• Mains voltage: 220/240 V, 50/60 Hz
• Power consumption: Approx. 18 VA
• Output for ignition transformer via relay contact
• Output voltage for valves and ignition transformer = mains voltage
• Contact rating: Max. 1 A per output
• Total load: Max. 2 A
• Average number of operating cycles depending on power factor cos ϕ: Approx. 1,000,000
• Reset button: Max. number of operating cycles: 1000
• Signal input: Remote reset
• Flame control: Sensor voltage: 220 V AC
• Sensor current: > 1 µA
• Reaction time: < 1 s
• Valve connections: 2
• Fuse in unit: F1: 2 A, semi time-lag E, pursuant to DIN 41571 V/EN 60127-1
• Ambient temperature: -20 °C to +60 °C
• Climate: no condensation permitted
• Enclosure: IP 40 pursuant to IEC 529
• Cable gland: PG 9
• Installation position: Arbitrary
• Weight: 390 g

Kromschroder IFS135B-3/1/1T 84344500 gas burner control box operation

• Upon receiving a heat call from the thermostat, the control initiates a sequence of checks.
• The control checks for flame simulation and activates failsafe measures during the testing period.
• If no flame signal is detected, the burner is started by applying voltage to valve V1 and the ignition transformer.
• If flame simulation is detected, the testing time is extended up to five seconds.
• After the testing period, if no flame signal is detected, the control goes into lockout mode.
• Following the burner start, a flame signal must be measured within the safety time.
• Upon ignition, voltage is applied to valve V2, causing it to open.
• If a flame fails to establish, the control enters fault lockout mode.
• During burner operation, the control continuously monitors for a flame signal.
• Fault lockout is indicated both internally and externally, with the fault indication retained during regulating stop.
• Resetting is possible even during regulating stop.
• Following a flame failure during operation, a reigniting attempt is made.
• However, valve V2 is switched off during this process.
• The flame must be detected within the safety time frame; otherwise, the control goes into fault lockout mode.