Hochiki SDP-3 Duct Probe Instruction Manual
- June 13, 2024
- HOCHIKI
Table of Contents
Hochiki SDP-3 Duct Probe
Product Information: Hochiki SDP-3 Duct Probe 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:
- ESP Analogue Sensors
- CDX Conventional Detectors
- ACA (inc all variants), ACC (inc all variants) ALG (inc all
variants), ALN (inc all variants) ALK (inc all variants) SLR (inc all variants) SLV (inc all variants)
Compatible Hochiki Bases that can be used within the SDP-3 are:
- ESP: YBN-R/3, YBN-R/3(SCI), YBO-R/SCI
- CDX Conventional: YBN-R/6, YBN-R/6SK, YBO-R/6R, YBO-R/6RN,
YBO-R/6RS
Product Usage Instructions: Hochiki SDP-3 Duct Probe Mounting Position:
The SDP-3 should be installed with the arrow on the cover corresponding to the direction of airflow in the duct. It 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 airflow 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 that in the case of square-section ducts, “diameter” refers to width.
Installation Procedure:
STEP 1 – Selecting Pipe Length:
The supplied 600mm sampling pipe can only be used with ducts up to a maximum diameter of 600mm. For ducts with a diameter greater than 600mm, use the 1500mm sampling pipe cut to size but penetrating the whole width of the duct. For ducts with a diameter greater than 1500mm, please contact Hochiki Europe Customer Support for advice at psupport@hochikieurope.com.
STEP 2 – Adjusting Pipe Length:
When using the optional mounting bracket on page 4, adjust the pipe length by loosening the locking screw (6) and tightening it after adjusting.
Remove the housing cover (four screws) and remove the airflow guide before installing the base and detector. The airflow guide must be replaced.
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:
ESP
Analogue Sensors
| ACA (inc all variants), ACC (inc all variants) ALG (inc all variants), ALN
(inc all variants) ALK (inc all variants)
---|---
CDX
Conventional Detectors
| SLR (inc all variants) SLV (inc all variants)
Compatible Hochiki Bases that can be used within the SDP-3 are:
ESP
Analogue
| YBN-R/3, YBN-R/3(SCI), YBO-R/SCI
---|---
CDX
Conventional
| YBN-R/6, YBN-R/6SK, YBO-R/6R, YBO-R/6RN,
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.
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.
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
Example of installations at sources of interference
- Fan
- Damper
- Silencer
- Battery
- Air handling unit
- Duct Bend
- Duct Branching
- Duct Narrowing or Expansion
Installation Procedure
STEP 1 – Selecting Pipe Length
The supplied 600mm sampling pipe can only be used with ducts up to a maximum
diameter of 600mm, but the pipe can be shortened if required (see STEP 2).
For ducts with a diameter greater than 600mm use the 1500mm sampling pipe cut
to size but penetrating the whole width of the duct (see “Large Diameter
Ducts” on Page 2).
For ducts with a diameter greater than 1500mm
contact Hochiki Europe Customer Support for advice
(psupport@hochikieurope.com).
STEP 2 – Adjusting Pipe Length
- After measuring the diameter of the duct and deducing the length of pipe required, shorten the pipe if necessary.
- The pipe should penetrate a minimum of 90% of the width of the duct.
- Do not cut the end of the pipe with warning label.
- Only cut between sampling holes.
- Once cut to length, insert the end plug.
Large Diameter Ducts
- When using a sampling pipe within a duct greater than 600mm diameter the pipe should penetrate the whole duct.
- Shorten the pipe to correct length if required
- Insert the end plug
- Fit the end plastic gasket
- Fit the sealing sleeve
STEP 3 – Insert Pipe into SDP-3
- Insert the pipe into the bottom of the SDP-3.
- Secure the pipe with the locking
STEP 4 – Drill Hole in Duct
Before mounting the SDP-3, drill a hole in the duct for the sampling pipe:
- Without bracket – hole diameter = 38mm
- With bracket – hole diameter = 51mm (see “Using the Optional Mounting Bracket” on page 4)
STEP 5 – Mounting the SDP-3 on the Duct
- Carefully mount the SDP-3, inserting the sampling pipe into the drilled hole in the duct wall.
- Secure the SDP-3 with the three supplied three 25mm self-tapping screws (positions shown).
STEP 6 – Base & Detector Installation
Remove the housing cover (four screws).
Remove the airflow guide before installing the base and detector. This part
MUST be replaced (see STEP 7).
The smoke detector or sensor is mounted on a base which is fixed and wired to
the SDP-3. The mounting base needs to be mounted on the centreline of the
unit, using the provided fixing holes.
Once the base is fitted refer to the wiring table at the end of these
instructions and follow the colour coding for connecting the flying wires to
the mounting base terminals.
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.
The two tables below explain which mounting holes are used to fix the specific
mounting bases for each detector type.
| ESP Sensors: | ALG or ALK |
|---|---|
| ESP Bases: | YBN-R/3, YBN-R/3(SCI), YBO-R/SCI |
| CDX Detectors: | SLR or SLV |
Bases:
| YBN-R/6, YBN-R/6SK, YBO-R/6R,
YBO-R/6RN, YBO-R/6RS.
Fit Base to Mounting Holes 2 and 3
ESP Sensors:| ALN or ACC
---|---
ESP Bases:| YBN-R/3, YBN-R/3(SCI), YBO-R/SCI
Fit Base to Mounting Holes 2 and 9
- Connect the base to the wires from the terminal block within the SDP-3. Use the wiring guide on page 4.
- External cabling should be passed through the knock-out holes located at the end of the SDP-3 housing. The unit features one central cable opening, two additional cable opening knockouts are provided.
- Suitable glands must be used such as PG13.5 or M20.
- Once base is fixed and connected, mount the sensor/detector ensuring the rib lines up with one on the base.
STEP 7 – Fitting the Airflow Guide
The airflow guide ensures sampled air from the duct directly enters the smoke
detection chamber of the installed sensor/detector and its position and
correct fitting are critical to the unit’s performance.
Insert the airflow guide into its mounting pillar and adjust the hinged nozzle
to rest directly on the detector, thus ensuring the air from the duct is
directed into the detector’s smoke chamber.
The airflow guide features a metallic airflow indicator strip which oscillates
when a suitable airflow is present. If this strip isn’t moving check the
airflow in the duct and the mounting position of the unit.
Replace the unit’s cover using the four screws.
STEP 8 – Testing the Sensor/Detector
Check the airflow around the detector with a suitable smoke detector tester.
Move the “test hole plug” to the side and briefly release a spray of aerosol
smoke. Check the detector goes into alarm, i.e. the red alarm LEDs are
activated. Also inspect the appropriate fire control panel indicators.
IMPORTANT! Replace the “test hole plug”. DO NOT drill any holes in the
unit’s cover. Holes will cause air leakages and seriously disturb the function
of the unit.
Fitting a Cover
Use the SDP-3 COVER when mounting the unit in places where condensation
problems could arise, e.g. cold attics or outdoors.
Fitting a Bracket
When installing the SDP-3 on circular ducts or on insulated rectangular ducts
use the optional Bracket (SDP-3 BRACKET). The bracket can also be used on
ducts with a diameter as small as 100mm.
- The SDP-3 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 51mm.
- The bracket should be fixed to the duct wall with appropriate fixings (not supplied).
- The supplied rubber gasket and sealing sleeve should be used.
Final Checks
- Check that the unit has been installed facing into the flow of air within the duct (in other words the slot in the sampling pipe is facing into the air flow).
- Check that the circular rubber gasket between the cover and top edge of the SDP-3 is air-tight.
- Check that the plastic plug of the test hole is also air-tight.Check that the air 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 unit.
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
Refer to LOOP/ZONE CABLES column featuring the intended mounting base in the
wiring table opposite.
Wire the loop/zone cables to the terminal block within the SDP-3 as shown.
Connect the coloured wires from the terminal block to the base terminals as
shown.
Hochiki Europe (UK) Ltd
Grosvenor Road, Gillingham Business Park, Gillingham, Kent, ME8 0SA, England
Telephone: +44(0)1634 260133
Facsimile: +44(0)1634 260132
Email: sales@hochikieurope.com
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.
References
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