Hochiki SDP-2 - Manual (Page 4)

Hochiki Europe (UK) Limited Page 4 of 4 2-3-0-456/ISS5/FEB09
STEP 10 - Fitting Cover
Fit the cover ensuring rear tabs (B) are located properly.
Then secure the cover in place with supplied screws
ensuring the unit is air-tight.
NOTE - IMPORTANT! Do not drill any holes in the
cover for signs/labels etc. Holes will cause air leakage
and seriously disturb the function of the detector.
Using the Optional Mounting Bracket
When installing the SDP-2 on circular ducts or on
insulated rectangular ducts use the optional Bracket
(SDP-BRACKET). The bracket can also be used on
ducts with a diameter as small as 100mm.
‰ The SDP-BRACKET is supplied flat and can easily
be bent or shaped to fit a circular or rectangular duct.
‰ When using the bracket the diameter of the hole in
the duct wall should be 48mm.
‰ The bracket should be fixed to the duct wall with
appropriate fixings.
‰ The supplied rubber gasket should be used.
Round Duct Insulated Rectangular Duct
Final Checks
‰ The arrow of the cover must have the same
direction as the airflow in the duct.
‰ Check that the rubber gasket between the cover and
bottom of the SDP-2 is air-tight.
‰ Check that the plastic plug of the test hole is also
air-tight.
‰ Check that the flow indicator oscillates ensuring
proper air-flow through the detector.
‰ It is recommended that smoke from a smoke
generator is introduced into the duct to check the
function of the detector.
Trouble Shooting
If only the Control Panel indicates an alarm/fault:
‰ Check that the EOL device is fitted in the last
smoke detector base on the zone (conventional
panels only).
‰ Check that the EOL device is the correct type
(conventional panels only).
‰ Check the loop for bad connections or short-circuits.
‰ Check the detector base with a voltmeter for approx
24Vdc and ensure the voltage is the correct polarity.
If the Smoke Detector and Control Panel indicate an
alarm without smoke (and cannot be reset):
‰ Check the detector; it may be contaminated with dirt
or condensation.
‰ Replace the detector as it may be faulty.
Terminal Block to Base Wiring Diagram
Refer to LOOP/ZONE CABLES column featuring the
intended mounting base. Wire the loop/zone cables to
the terminal block within the SDP-2 as shown. Connect
the coloured wires from the terminal block to the base
terminals as shown.
NOTE: When using the YBO-R/6R, YBO-R/6RN or
YBO-R/6RS bases - remove the crimp from the ends of
the BROWN (6) and WHITE (7) wires before attempting
to connect to the mounting base terminals.
R=RED, BL=BLUE, P=PINK, GY=GREY, Y=YELLOW, GN=GREEN,
BR=BROWN, W=WHITE
Hochiki Europe (UK) Ltd
Grosvenor Road, Gillingham Business Park,
Gillingham, Kent, ME8 0SA, UK
Telephone: +44(0)1634 260133
Facsimile: +44(0)1634 260132
Email: [email protected]
Web: www.hochikieurope.com
Hochiki Europe (UK) Ltd. reserves the right to alter the specification of its products
from time to time without notice. Although every effort has been made to ensure the
accuracy of the information contained within this document it is not warranted or
represented by Hochiki Europe (UK) Ltd. to be a complete and up-to-date description.
Please check our web site for the latest version of this document.