Siemens FDOOT241-8, Техническое руководство, Страница: 12 / 32

2
Principles and conditions of modernization
Experience of modernization work
12
Building Technologies
A6V10323158_d_en_--
Fire Safety 2015-04-09
2.4 Experience of modernization work
The recommendations described in this document are based on the following
experiences:
l
Experiences in the field with the FDOOT241-x point detectors from the 'Sinteso'
product line
l
Test reports from HQ Zug
l
Comparative testing from HQ Zug
When modernizing a fire detection installation, the ambient conditions such as
room dimensions, deceptive phenomena and ventilation must be taken into
account.
Existing rooms may have experienced a change in use since the fire detection
installation was first commissioned. Check what the room is currently used for
and select appropriate fire detectors. Position the fire detectors at appropriate
points and select a fire detector configuration adapted to the surroundings.
2.5 General limitations on modernization
When planning a modernization, the following limitations must be taken into
account:
l
The following devices can generally not be replaced with a multiple protocol
device:
– All special detectors
– All manual call points
– All input/output modules
l
The multiple protocol detectors cannot generally be used in the housing of air
sampling smoke detection kits.
l
The maximum number of peripheral devices possible per loop must be
checked:
– Per loop, max. 126 detectors, as of Sinteso MP4.0 max. 252 detectors
– For AnalogPLUS, Interactive, or SIGMALOOP: Max. 128 detectors
l
Note the information provided in document 001508 relating to installation
(calculation of the capacity layer). See the chapter 'Applicable documents
[➙ 7]'.
l
All detectors not replaced must be replaced with detectors from the 'Sinteso'
product line when changing over to FDnet.
l
Limitations exist when connecting external alarm indicators. You will find more
information in chapter 'Limitations for the detector families [ ➙ 14]'.
l
Only the following topologies are permitted: 'Stub', 'Loop', and 'Sub-stub on
loop'. Sub-stub on sub-stub, sub-stub on stub, and several stub branches from
one location are not permitted.
l
You will find more information about detector compatibility in
document 008331. See the chapter 'Applicable documents [ ➙ 7]'.