Robur F1 81 - Safety and Control Devices

User, Installation and Service Manual for F1 Gas Unit Heaters 5
Ed. 11/2006
SAFETY AND CONTROL DEVICES
- High temperature limit switch: 100°C with manual reset (prevents the overheating of the heat
exchangers)
- Pressure differential switch: for the control of the correct flue fan operation; when fan not
operates correctly or the flue/air inlet ducts are obstructed the pressure switch stops the gas
supply by closing the gas valve.
- Gas valve: in the case that one of the safety devices is activated (limit thermostat, safety
thermostat etc.) the gas valve is automatically de-energised with contemporary cut-off the
burner’s gas supply.
- Electrical supply: 230 V – 50 Hz
- Operational temperature: 0°C to + 60°C
- Model: HONEYWELL VK 4125A for the Heaters F1 21. 31. 41. 51. 61
BM 762 for the Heater Model F1 81
- Ignition and flame control box: controls the ignition and flame of the premix burner; if the is
flame not detected during the safety period the flame control box will stop the appliance; with
manual reset.
- Safety time: ignition 10 seconds
- Purge time: 40 seconds
- Power supply: 230V – 50 Hz
- Flame control box model: BRAHMA CM32PR
- Ignition transformer: BRAHMA TC2LTCAF / EICHHOFF 4718/2
A
) flame control box
B) pressure switch
C) fuse 6,3A 5x20
B
A
E
C
D
D) speed regulation board
E) ignition transformer
Figure 1