Fike 205-0012 Installation And Maintenance Instructions

General Description
The Sita 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.
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.
Spacing
Fike recommends spacing detectors in accordance with any local authority. 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.
Detector Installation
All wiring must be installed in compliance with the recommendations laid out by any local authority as well as any special
recommendations documented in the control panel installation manual. The cabling used should be of a 2-core 1.5mm
screened, fire resistant type with the following characteristics:
Max Capacitance Core to Scrn ..................................................................180pF / m
Max Capacitance Core to Core ..................................................................100pF / m
Max Inductance ..........................................................................................1.0mH / km
Max Resistance Two Core Scrnd 1.5mm² .................................................. 12.1Ω / km
It is to be wired in the form of a scrnd 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.
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.
Please remember that all high voltage testing must be carried out before the installation
of the electronics, otherwise the electronics will be damaged. Please also note that the
SCRN terminal should only be connected to the loop scrn and NOT the building earth.
Once all testing has been carried out on the cabling and continuity & insulation has been
proven, the Sita multipoint ASD detector head may be fitted. Before installing the head
remember to note the serial number of the device (located on the rear of the detection
head) onto your drawings or configuration sheets to enable you to prove its location later.
The address allocation for the device is carried out automatically by the control panel
whilst in initialisation mode, so addresses do not need to be set manually.
To install the detection head, locate the plastic guides into the base and gently twist
clockwise until the unit locks in place.
INSTALLATION AND MAINTENANCE
www.acornfiresecurity.com
INSTRUCTIONS
205-0003 SITA MULTIPOINT ASD DETECTOR
205-0001 SITA MULTIPOINT ASD WITH SOUNDER
205-0012 SITA MULTIPOINT ASD WITH SOUNDER / STROBE
Document No. 26-0874-14
www.acornfiresecurity.com
Subject to change
FIKE.COM
Terminal Description
1 LOOP 0V * Loop –ve IN & OUT
2 LOOP +IN Loop +ve IN
3 LOOP +OUT Loop +ve OUT
4 AUX +VE * Auxiliary +ve if used
5 AUX –VE Auxiliary –ve if used
SCRN Cable Scrn
*For Remote LED use Terminals
1(0v) & 3(+ve)
3
4
5
2
1
N
R
C
S
2