Hochiki SDP-3 Installation Instructions

Hochiki SDP-3 Duct Probe
Installation Instructions
Hochiki's Duct Probe housing allows a standard
photoelectric smoke detection device, either a
conventional detector or an analogue sensor, to be
mounted on the outside of an air duct for the purpose
of monitoring the air within the duct. Air within the
duct is drawn via a pipe into the duct probe's
housing. This allows constant sampling with a
standard, LPCB approved smoke detector and
makes smoke detection within the duct simple,
effective and easy to maintain.
Compatible Hochiki devices that can be used within
the SDP-3 are:
ACA (inc all variants),
ESP ACC (inc all variants)
Analogue ALG (inc all variants),
Sensors ALN (inc all variants)
ALK (inc all variants)
CDX
SLR (inc all variants)
Conventional
SLV (inc all variants)
Detectors
Compatible Hochiki Bases that can be used within
the SDP-3 are:
ESP YBN-R/3, YBN-R/3(SCI),
Analogue YBO-R/SCI
YBN-R/6, YBN-R/6SK,
CDX
YBO-R/6R, YBO-R/6RN,
Conventional
YBO-R/6RS.
Mounting Position
The SDP-3 should be installed with the arrow on
the cover corresponding to the direction of airflow in
the duct.
Hochiki Europe (UK) Limited
www.acornfiresecurity.com
The SDP-3 can be placed horizontally or vertically,
on the top, side or bottom of the duct. Hochiki
recommends that the unit is mounted away from
heating, cooling or humidity devices following the
same guidelines for flow monitors.
The SDP-3 smoke detector must be installed
pointing towards the air flow direction.
A distance of 3 times the duct diameter should be
left before a damper, filter or change of the duct
direction, and 5 times the diameter after these
devices.
NOTE: The word "diameter" has been used
throughout. In the case of square-section ducts this
should be read to mean width.
Hydraulic Diameters
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Example of
installations at sources
of interference

Fan

Damper

Silencer

Battery

Air handling unit

Duct Bend

Duct Branching

Duct Narrowing
or Expansion
2-3-0-456/ISS6/JAN16