INSTRUCTION
i
Read this instruction before installation
and wiring of the product
SDD-OE65-RACM
1
SDD-OE65-RACM
Optical smoke detector for duct mounting
SDD-OE65-RACM is an optical smoke detector with 24 V AC supply
voltage for smoke detection in ventilation systems. The detector has
a relay output for smoke alarm indication as well as a built-in auxiliary
fan. SDD-OE65-RACM is not to be connected to Regin’s control units
ABV...
Technical data
Supply voltage
24 V AC ±15 %
Installation
Make a 30 mm hole at a suitable location on the duct. The detec-
tor should be mounted at least 3 duct diameters away from bends,
air intakes or other sources of disturbance to the airflow in the duct.
Remove the enclosure lid and remove the detector head which is
bayonet mounted.
Mount the venturi tube by removing the screw from the tube’s
unclosed end, stick the end of the tube into the hole in the bottom of
the enclosure with the holes in the tube aligned with the enclosure’s
longitudinal axis. Fasten the screw through the hole in the PC-board.
Replace the detector head. To shorten the venturi tube remove the
endplate and gasket from the tube’s outer end, shorten the tube mak-
ing sure to cut it at right angles and remount gasket and plate.
Temporarily replace the lid oriented so that the LED on the detector head
is visible through the window. Put the tube through the hole in the duct,
orient the unit so that the arrows on the lid point in the flow direction (see
figure 1) and fasten the unit to the duct using the mounting ”wings”. For
round ducts the wings can be bent to fit the duct curvature. For insulated
ducts, special mounting brackets are available as an extra accessory.
Flow
Figure 1. Flow direction
Wiring
Wire the detector according to figure 2.
Terminal 1
24 V AC ±15 % supply voltage
Terminal 2
24 V AC ±15 % supply voltage
Auxiliary fan
Terminal 3
24 V AC ±15 %
Terminal 4
24 V AC ±15 %
Alarm relay
2 A, 24 V AC, potential-free change-over
Terminal 6
Normally closed
Terminal 7
Common
Terminal 8
Normally open
SDD-OE65-
RAC(M)
1
2
3
4
6
7
8
Figure 2. Wiring. Relay drawn in alarm position.
Function indicators
Flow indicator
The detector has a built-in flow indicator with a red signal flag which is
located on the air inlet. During normal operation, it will be lifted by the
flow of air, thereby indicating correct air flow through the detector.
Smoke alarm
The detector head has a built-in LED for alarm indication. The LED is
normally extinguished but will light up red at a smoke alarm. Simulta-
neously the alarm relay is activated.
Function test
The cover has a red plastic plug on the side of the lid to simplify
control with e.g. test gas. Avoid spraying gas directly onto the detector
head and only use small amounts at a time to avoid unnecessary
contamination of the detector.
Auxiliary fan
When the air handling unit is stopped, the fan is normally activated in
order for SDD-OE65-RACM to detect smoke in the air duct.
Maintenance
The detector should be tested and cleaned on a yearly basis to
ensure proper function. Cleaning of the venturi tubes, the housing and
the outside of the detector head can be done using a vacuum cleaner.
Note: Do not try to disassemble the detector head for cleaning.
EMC emissions and immunity standard
The product conforms with the requirements of European EMC
standards CENELEC EN50081-1 and EN50082-1 and carries the CE
mark.
Contact
AB Regin, Box 116, 428 22 Kållered, Sweden
Tel: +46 31 720 02 00, Fax: +46 31 720 02 50
www.regin.se, [email protected]
8485A
JUN 1
1
EN
