Polon-Alfa TUN-4046, Installation And Maintenance Manual

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4 IK-E283-001GB
3.2 Works at height
Any detector installation works carried out at height must be executed with particular care utilising
tools and machinery in good working condition.
Special attention shall be given to stability of ladders, elevators, lifts, etc.
Any electric tools shall be used strictly obeying the safety rules stated in instruction manuals by
manufacturers.
3.3 Anti-dusting eye protection
It is obligatory to use protective anti-dusting glasses and masks during detector installation works
that produce high amount of dust, such as hole drilling in ceilings.
4 DESIGN DESCRIPTIONS
Fig. 1. TUN-4046 detector overall view
The detector mechanical construction is shown in Fig. 1. Its basic element is a detecting module
consisting of a temperature-sensitive resistor (thermistor). The thermistor, protruding above the
detector casing, is located in the central point and protected against mechanical damages by a
basket. The detecting module is fastened to a printed board that contains all electronic elements and
the detector operation monitoring processor. The detector shape and construction enable free
ambient air flow and its direct impact on the detecting circuit. The whole structure is placed in a
white plastic housing containing a basket, detector cover, ring, and screen.
The TUN-4046 detector is installed in the G-40 base where detection line cables are connected to.
5 PRINCIPLE OF OPERATION
The TUN-4046 heat detector reacts to a rise of temperature occurring during initial phase of fire.
The detector operates in two ways:
- as a fixed temperature detector – after exceeding its set-up temperature activation
threshold, pursuant to its given class;