Hochiki SDP-2 - Manual (Page 3)

Hochiki Europe (UK) Limited Page 3 of 4 2-3-0-456/ISS5/FEB09
NOTE - IMPORTANT! The arrow on the SDP-2 cover
must have the same direction as the air-flow within the
duct.
Supplied Screw Guide
25mm - 3 off
(Self-tapping) 20mm - 2 off
(Self-tapping) 10mm - 1 off
(Self-tapping)
STEP 6 - Installing Detector/Sensor/Base
The smoke detector or sensor is mounted on a base
which is fixed and wired to the SDP-2. Depending on
which type of base is being used, the spacer (supplied)
may be required to raise the height of the detector or
sensor. The table below identifies when the spacer
should be used:
RANGE BASE USE
SPACER
YBO-R/SCI NO
ESP
YBN-R/3 YES
YBN-R/6 YES
YBN-R/6SK YES
YBO-R/6R NO
YBO-R/6RS NO
CDX
YBO-R/6RN NO
‰ If using the spacer, first slot this onto the fixing posts
marked “C” inside the SDP-2 ensuring it is the
correct way up (see diagram) and that the cable -
ribbon is underneath. Then fix the base to the SDP-
2 on top of the spacer with the two 20mm screws
(supplied) using the fixing posts marked “U” (see
diagram) passing the cable-ribbon through the base.
Ensure that the rib (see “R” below) on the side of the
base is pointing towards the sampling pipe.
‰ Connect the base to the wires from the terminal
block within the SDP-2. Use the wiring guide on
page 4.
‰ External cabling should be passed through the
knock-out holes located at the end of the SDP-2
housing and suitable glands must be used. Connect
the cabling to the terminal block using the wiring
guide on page 4.
‰ Once base is fixed and connected, mount the
sensor/detector ensuring the rib lines up with one on
the base and points towards the sampling pipe.
NOTE - IMPORTANT! When using Hochiki
CONVENTIONAL Optical Smoke Detectors. If only one
smoke detector is connected to the Control Panel, this
detector’s base should be fitted with an End Of Line
(EOL) device compatible with that Control Panel. When
several smoke detectors are connected to one Control
Panel, the EOL device should be connected to the last
base. There should only be one EOL device per zone.
STEP 7 - Re-fitting Air-Flow Block
Carefully slot the air-flow block back onto the SDP-2
ensuring it makes good contact with the base of the unit.
NOTE - IMPORTANT! Once the unit is assembled and
fitted, check the flow indicator. This is a metal disc
suspended on a wire in the recess on top of the air-flow
block. Note that the indicator oscillates but does not
rotate. If the indicator does not move, you should firstly
check the air-flow within the duct and secondly, the
positioning of the SDP-2.
STEP 9 - Testing Smoke Detection
To test the detector/sensor before fitting the cover to the
SDP-2 use smoke from a match or an approved test
gas.