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space around the unit must facilitate free flow of air. The air humidity in the rooms where the unit
operates must not exceed 95 %.
1.3.3 Repairs and maintenance
The maintenance works and periodical inspections should be conducted by the authorised
employees of companies which have been authorised or trained by Polon-Alfa personnel. All repair
works must be done exclusively by the manufacturer. Polon-Alfa does not bear any responsibility for
the operation of devices maintained and repaired by unauthorised personnel.
1.3.4 Fuse replacement
When replacing fuses, it is obligatory to use only spare ones of the appropriate type and nominal
value. The appropriate types and nominal values are contained in Table 2.2 and chapter 13 of this
Documentation.
1.4 DEFINITIONS
Addressable detection line
A detection line that enables connection of addressable elements.
Side detection line
A detection line for two-state non-addressable fire warning devices, created using the ADC-4001
adapter.
Addressable element
An element operating in a detection addressable line with a unique and unchangeable identifier,
i.e. serial number, and the element number defined during its configuration. An addressable element
enables two-way exchange of digital data with the control panel (transmission and reception).
Line element
An element installed in detection addressable lines (addressable element) and side lines (non-
addressable element).
Serial number
A unique 12-digit number assigned to each addressable element during the production process. The
serial number contains the addressable element type identified by the control panel.
Line number
An ordinal number (of 1 ÷ 8 range) assigned to open or loop detection lines. The line numbering is
linked with the MSL-1M (1 ÷ 4) and MSL-2M (5 ÷ 8) modules.
Element number
An ordinal number (range 1 ÷ 127) assigned to an addressable element when a detection line is
configured. During normal operation, the control panel communicates using the element number
(so-called "short number").
Address space
A set of number pairs containing a line number and element number that define all possible program
locations of the elements within an installation.
Zone
A separated section of the protected premises to which defined line elements are assigned.
