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1. General Information
These instructions should be read carefully and retained for further
reference and maintenance.
2. Safety
• Before installation or maintenance, ensure the mains supply to the
boost timer is switched off and the circuit supply fuses are removed
or the circuit breaker turned off.
• It is recommended that a qualified electrician is consulted or used for
the installation of this boost timer and install in accordance with the
current IEE wiring and Building Regulations.
• Check that the total load on the circuit including when this boost
timer is fitted does not exceed the rating of the circuit cable,
fuse or circuit breaker.
3. Technical Specifications
• 230V AC 50 Hz
• Fused:
Supplied with BS1362 13A Fuse
• Switch Rating:
13A Resistive (3kW)
1000W Incandescent,
Halogen lighting
500W Fluorescent lighting
200W LED lighting
100W Compact Fluorescent lighting
• Contact Type:
Normally Open
• Minimum Depth of Wall Box: 25mm
• Boost Times:
FBT4 ¼, ½, 1, 2 hours
FBT5 1, 2, 3, 4 hours
• Operating Temperature:
0°C to +40°C
• CE Approved
• Dimensions (H x W x D):
85mm x 85mm x 31mm
Note: Not suitable for use with Discharge Lighting.