26-0874 Issue 10
General Description
The Multipoint ASD is a plug-in type smoke detector that utilises a photo-electric
sensing chamber to make a measurement corresponding to smoke density. The
device also incorporates a thermistor sensing circuit to allow for accurate heat
measurement. These elements allow the device to be configured to a smoke, heat
or combined setting. Digital communication technology to the control panel is
implemented allowing for accurate data transfer at high transmission speeds. This
device is only compatible with the Sita200plus, Duonet and Quadnet ranges of
control panels and may also incorporate a sounder or visual indication beacon
(ignore all references to sounders/beacons if your device has no sounder/beacon).
Before Installation
The detector must be installed in compliance with the control panel installation manual. The installation must also
meet the requirements of any local authority. For maximum performance the detector should be installed in
compliance with BS5839 Pt1 : 2002 + A2 : 2008.
Spacing
Fike recommends spacing detectors in accordance with BS5839 Pt1. Due to the effects of IR and possible
magnetic interference, detectors should not be fitted any closer than 500mm (preferably 1000mm) to a light fitting or
any other source of IR or EMI. In addition to this recommendation, the device should be mounted so that the
indication LED is facing towards the light source. For more specific information regarding detector spacing,
placement and special applications please refer to BS5839 Pt1 : 2002 + A2 : 2008.
Detector Installation
All wiring must be installed in compliance with the recommendations laid out by BS5839 as well as any special
recommendations documented in the control panel installation manual.
The cabling used should be of a 2-core
1.5mm
2
screened, fire resistant type with the following characteristics:
Max Capacitance Core to Screen ................................................... 180pF / m
Max Capacitance Core to Core....................................................... 100pF / m
Max Inductance ............................................................................... 1.0mH / km
Max Resistance Two Core Screened 1.5mm² ................................
12.1Ω / km
It is to be wired in the form of a screened 2-core loop returning to the control panel. The use of spurs on
this system is not permitted.
Cables may be terminated into the connectors mounted in the base, as shown
below. Care should be taken when terminating devices to ensure all cables are correctly sleeved and connections
are secure. Improper connections will prevent a system from responding properly in the event of a fire.
Terminal
Description
1 / LOOP 0V
Loop –ve IN & OUT
(also Remote LED 0V if used)
2 / LOOP +IN
Loop +ve IN
3 / LOOP +OUT
Loop +ve OUT
4 / AUX +VE
Auxve if used
(or Remote LED +ve if used)
5 / AUX –VE
Auxiliary –ve if used
SCRN
Cable Screen
The Loop +ve (positive) IN and the Loop +ve (positive) OUT connections are automatically joined together (short
circuit) by a spring arm between terminals 2 and 3 until the detector is installed. This allows for cable continuity
readings at the commissioning stage.
INSTALLATION AND MAINTENANCE INSTRUCTIONS
205-0003 Sita Multipoint ASD Detector,
205-0001 Sita Multipoint ASD with Sounder,
205-0012 Sita Multipoint ASD with Sounder / Strobe
1
2
3
4
5
S
R
N
C
