Honeywell GENT Venturi-Air Duct Kit User manual

Installation Instruction
Venturi-Air Duct Kit
(Part No. S4-34760)
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S4-34760_Venturi-Air Duct Kit
24188-971_issue 1_07/09_duct sensor kit
Intended purpose
This product is designed for installation on a loop circuit of a Vigilon system.
Warning
In order to ensure correct and safe operation of the product, all guidelines must be observed.
Safety-relevant user information
This manual includes all information required for the proper use of the products described.
The term 'qualified personnel' in the context of the safety information included in this manual or on the
product itself designates:
•project engineers who are familiar with the safety guidelines concerning fire alarm and extinguishing
systems.
•trained service engineers who are familiar with the components of fire alarm and extinguishing systems
and the information on their operation as included in this manual.
•trained installation or service personnel with the necessary qualification for carrying out repairs on fire
alarm and extinguishing systems or who are authorised to operate, ground and label electrical circuits
and/or safety equipment/systems.
Safety warnings
The following information is given in the interest of your personal safety and to prevent damage to the
product described in this manual and all equipment connected to it.
Safety information and warnings for the prevention of dangers putting at risk the life and health of user and
maintenance personnel as well as causing damage to the equipment itself are marked by the following
pictograms. Within the context of this manual, these pictograms have the following meanings:
Warning sign
Designates risks for man and/or machine. Non-compliance will create risks to man and/or
machine. The level of risk is indicated by the word of warning:
Important information on a topic or a procedure and other important information!
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Table of contents
1General ............................................................................................................................................................................4
2Mounting ..........................................................................................................................................................................4
2.1 Mounting the air duct kit...........................................................................................................................................5
2.2 Calculation of upstream and downstream distances ...........................................................................................6
2.3 Mounting ÎVenturi tubes up to 600 mm .............................................................................................................8
2.4 Mounting ÎVenturi tubes between 600 mm and 2800 mm ..............................................................................9
2.5 Adapt the Venturi tube length .............................................................................................................................. 10
2.6 Mounting the Venturi tube .................................................................................................................................... 10
2.7 Mounting kit for circular and insulated air ducts ................................................................................................. 11
3Opening the enclosure ................................................................................................................................................ 12
3.1 Detector base wiring ............................................................................................................................................. 12
3.2 Install fire detector ................................................................................................................................................. 13
4Final check.................................................................................................................................................................... 14
5Maintenance................................................................................................................................................................. 15
6Specifications ............................................................................................................................................................... 16
7Accessories .................................................................................................................................................................. 16
8Loop Wiring................................................................................................................................................................... 17
Additional and updated Information
The described features, specifications and product related information in this manual
correspond to the date of issue (refer to date on the back page.
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S4-34760_Venturi-Air Duct Kit
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1 General
The air duct kit (Part No. S4-34760) is used in combination with different Venturi tubes and special S-Quad fire
detector for the surveillance of air ducts in buildings.
Suitable S-Quad fire detector:
Part No. Description
S4-715 Optical Sensor
The kit is fastened to the outside of the air duct. The Venturi tube is lead into the duct through a hole drilled for
this purpose. The air streaming through the air duct is picked up by the Venturi tube and led via the deflecting
unit inside the housing directly to the detector for subsequent evaluation.
The inserted S-Quad fire detector is directly connected to the analog loop of the Fire Alarm System. The
operation and indication of alarm and fault messages is given at the connected fire alarm panel.
Subpackage
1 x Short screw – to fix the Venturi tube in the enclosure
3 x Long screws – to fix the air duct kits enclosure on the air duct
1x Rubber gasket (opening of enclosure ⇔Venturi tube)
1x End cap for venturi tube (inside the air duct)
2 Mounting
The required mounting position is indicated by the arrow on the top of the enclosure. The alignment of the air
duct kit is correct if the arrow points into the same direction as the air flow inside the duct.
The arrow shaped bottom of the enclosure provides a quick info for the correct positional arrangement of the air
duct kit.
•To avoid any damage to the devices, the supplied material in the subpackage must be used for
mounting the air duct kit.
•If the minimum dimensions of the entry and exit paths can not be provided, care must be taken
to ensure a homogenous air stream at the Venturi tube when installing the air duct detector.
•The direction of the air flow is not comparable with the upstream/downstream distances. This
way denotes the close area of the Venturi pipe. Observe the appropriate rated pipe diameter!
•It may be necessary to have the air duct cross-section adapted by the company - installing the
air duct - to the local dimensions in order to ensure correct operation of the air duct detector.
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Dimensions
235
146
180
27
183
70
35
Fig. 1: Dimensions
2.1 Mounting the air duct kit
The required mounting position is indicated by the arrow on the top of the enclosure. The arrow shaped
bottom of the enclosure provides a quick info for the correct positional arrangement of the air duct kit.
Mount the kit with the supplied three long screws
on the duct. Only the three marked holes may be
used to fasten the kit on the air duct.
The kit can be mounted in different positions (top,
side, bottom) on the air duct without affecting the
proper operation.
The arrow on the housing of the air duct kit
must point into the direction of the air flow.
The Venturi tube must be aligned in the middle of
the ducts diameter and lead into the duct.
Fig. 2: Mounting and orientation of the air duct detector
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2.2 Calculation of upstream and downstream distances
Air duct with circular cross-section Air duct with rectangular cross-section
d
h
= 2 x H x B
H + B
d
h
= D
B
H
D
In order to prevent incorrect measurements the air through the duct detector should be in the same direction as
the air flow through the duct. For applications with a detector mounting close to reducing dampers and
regulating flaps, filter units or bends, the following minimum distances must be observed:
upstream Îat least 3 x the nominal diameter of the air duct
downstream Îat least 5 x the nominal diameter of the air duct
Fig. 3: Air duct detector after a bend in the duct system and downstream from an air intake (Example)
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Different application samples for the air duct mounting are shown in following diagrams to calculate the required
air inlet/exhaust sections.
MIN 3xdhMIN 5xdh
ADD ADD
Direction
of air flow
Direction
of air flow
MIN 3xdhMIN 5xdh
ADD ADD
Direction
of air flow
Direction
of air flow
Fig. 4: Exhauster Fig. 5: Reducing damper or regulating flap
MIN 3xdhMIN 5xdh
ADD ADD
Direction
of air flow
Direction
of air flow
MIN 3xdhMIN 5xdh
ADD ADD
Direction
of air flow
Direction
of air flow
Fig. 6: Silencer Fig. 7: Air reservoir
MIN 5xdh
MIN 3xdh
ADD
ADD
Direction
of air flow
Direction
of air flow
MIN 5xdh
MIN 3xdh
ADD
ADD
MIN 3xdh
Direction
of air flow
Direction
of air flow
Direction
of air flow ADD
Fig. 8: Bend in the air duct system Fig. 9: Branch in the air duct system
MIN 3xdhMIN 5xdh
ADD ADD
Direction
of air flow
Direction
of air flow Return air
Inlet air
MIN 5xdh
ADD
ADD
MIN 3xdh
Direction
of air flow
Fig. 10: Diameter decrease or increase in the
air duct system
Fig. 11: Air control unit
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2.3 Mounting ÎVenturi tubes up to 600 mm
To mount the air duct (with or without the optional mounting kit Part No. S4-34760-99) with a pipe length of max.
600 mm the air duct must be drilled as shown in the figure.
Mounting information!
Drill a hole (∅38 mm) in the air duct and deburr the
borehole.
Cut the Venturi tube to the required length
(refer Section 2.5 “Adapt the Venturi tube length“).
Air duct diameter
up to 600 mm
Direction of
air flow
Hole ∅ 38 mm
Close the end of the Venturi tube by means of the
supplied sealing cap.
Fig. 12: Venturi tubes up to 600 mm
The immersion depth of the Venturi tube in the air duct should be 90% of the ducts diameter.
Observe distance caused by the optional mounting kit if required!
Refer to section 2.6 “Mounting the Venturi tube”!
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2.4 Mounting ÎVenturi tubes between 600 mm and 2800 mm
To mount the air duct (with or without the optional mounting kit Part No. S4-34760-99) with a pipe length of
more than 600 mm the air duct must be drilled at two points as shown in the figure.
Mounting information!
Drill a hole (∅38mm) in the air duct and deburr the
borehole.
upper hole Î∅38 mm
bottom hole Î∅50 mm
Cut the Venturi tube to the required length
(refer Section 2.5 „Adapt the Venturi tube length“).
Seal the borehole of the air duct on the lower end of
the Venturi tube with the supplied plastic gasket
(use only Part No. S4-34760-15 / S4-760-28).
Insert rubber gasket in the lower borehole of the air
duct (∅50 mm).
Close the end of the Venturi tube by means of
the supplied sealing cap.
air duct diameters between 600 mm and 2700 mm
Because ot its lenght, the Venturi tube has to be
supported in the opposite side of the air duct.
Hole ∅ 50 mm
Direction of
air flow
Hole ∅ 38 mm
30
The Venturi tube should not protrude by more than
30 mm above the air duct.
Fig. 13: Venturi tubes between 600 mm and 2800 mm
The Venturi tube must be about 30 mm longer as the diameter of the air duct.
Observe distance caused by the optional mounting kit if required!
Refer to section 2.6 “Mounting the Venturi tube”!
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2.5 Adapt the Venturi tube length
The Venturi tube of the air duct kit has to be adapted to the diameter of the air duct system. Venturi tubes are
available in three different lengths which can then be cut - if needed - to the required length.
Diameter of the air duct Length of the Venturi tube Part No.
140 mm to 600 mm 600 mm S4-34760-06
600 mm to 1400 mm 1500 mm S4-34760-15
1400 mm to 2700 mm 2800 mm S4-34760-28
1)
For systems with a tube length of more than 600 mm the Venturi tube must be about 30 mm longer as the diameter of the air duct.
Fig. 14: Cutting the Venturi tube to the required length.
2.6 Mounting the Venturi tube
•Fit the supplied rubber gasket on the upper side of the Venturi
tube (enclosure ⇔Venturi tube).
•Insert Venturi tube in the correct positional-Rohr arrangement 
into the oval opening of the air duct kit.
•Fasten Venturi tube in the bottom of the enclosure with the
supplied short screw (subpackage).
•The end of the Venturi tube must be terminated with the supplied
end cap .
Fig. 15: Mounting the Venturi tube
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