Overall dimensions Overall dimensions Overall dimensions Overall dimensions
HYDRA® sprinkler hose and mounting system: HYDRA® sprinkler hose and mounting system: Nominal Minimum Minimum distance H (min.)
overall dimensions overall dimensions diameter bending radius
x = distance between centre of hose outlet / x = distance between centre of hose outlet / DN 20 70 mm 200 mm
suspended ceiling (see installation diagram) suspended ceiling(see installation diagram)
DN 25 85 mm 250 mm
DN 20 x R min. R max. DN 25 x R min. R max. Where space is restricted, we recommend the use of a
NL 1000 < 200 0 800 NL 1000 < 200 nicht empfohlen special version with 90° elbow: the minimum distance H is
300 0 750 300 nicht empfohlen then just 150 mm.
400 0 700 400 300 700 Fitting an Assembly Instructions for Sprinklers
500 0 650 500 200 650
600 0 600 600 100 600
700 0 500 700 0 500 3.7. Fitting the rosette
The last part of the installation is fitting the cover rosette
NL 1200 < 200 0 1000 NL 1200 < 200 0 1000 to the underside of the suspended ceiling.
400 0 900 400 0 900
500 0 850 500 0 850
600 0 800 600 0 800
700 0 700 700 0 700 3.8. Hoses with 90° elbow
800 0 600 800 0 600 When fitting hoses with 90° elbow and solid threaded nip-
900 0 500 900 0 500 ple, make sure the HYDRA® sprinkler hose is under no tor-
sion. To position the sleeve vertically, screw in the hose in
NL 1500 < 200 0 1200 NL 1500 < 200 0 1200 the threaded sleeve of the main supply pipe. Do not twist
300 0 1200 300 0 1200 To achieve precise vertical and horizontal positioning, the hose once it is installed.
400 0 1150 400 0 1150 move the sleeve in the fixing collar of the holder. Make
500 0 1150 500 0 1150 sure you comply with the manufacturer’s fitting guidelines
600 0 1100 600 0 1100 for the sprinkler head. In addition, the information given in our technical product
700 0 1100 700 0 1100 descriptions should be applied.
Tighten the two self-locking nuts (AF size 13) to ensure
800 0 1100 800 0 1100
the sprinkler hose is firmly clamped to the special holder.
900 0 1000 900 0 1000
A torque figure of 4 Nm is recommended. Make sure the
1000 0 900 1000 0 900
hose is torsion-free when fitted.
NL 2000 < 200 0 1750 NL 2000 < 200 0 1750
300 0 1750 300 0 1750 The HYDRA® sprinkler hose should be suspended freely
400 0 1700 400 0 1700 in the space between the concrete ceiling and suspended
500 0 1700 500 0 1700 ceiling without coming into contact with the concrete Witzenmann GmbH
600 0 1650 600 0 1650 ceiling or any other equipment. Also, make sure the Östliche Karl-Friedrich-Str. 134
700 0 1650 700 0 1650 bending radius of the HYDRA® stainless steel hose is no 75175 Pforzheim
800 0 1600 800 0 1600 Germany
less than the specified minimum. Make sure you observe
900 0 1550 900 0 1550 Phone +49 - (0) 72 31 - 5 81- 0
the minimum distance H between concrete ceiling and
1000 0 1500 1000 0 1500 Fax +49 - (0) 72 31 - 5 81- 8 20
HYDRA® Sprinkler Mounting Systems for Suspended Ceilings Applications/Approvals Installation Installation Installation Installation
1. GENERAL 2. APPLICATIONS / APPROVALS of installation, shape the hose into a spiral. 3.4. Fitting the special holder to the ceiling system 3.6. Fastening the sprinkler hose to the special holder /
If your installation or operating conditions deviate from The HYDRA® special holder is fitted to the upper side of positioning the sprinkler
Where standard rigid pipe systems are used, the task HYDRA® Sprinkler Mounting Systems are recognised HYDRA® sprinkler mounting systems are suitable for use the specifications mentioned above, refer to the manufac- the ceiling element and must be arranged so that the holes
of correctly positioning sprinklers in suspended ceilings and approved for use in wet sprinkler systems. The with tap water or drinking water at ambient temperature. turer for technical advice. cut in the ceiling element and the special holder line up Feed the sprinkler already attached to the sprinkler hose
using conventional methods can be arduous and therefore pressure rating of VDS-approved systems When installing and testing the sprinkler system for the concentrically. The special holder is fastened to the sup- through the fixing collar of the holder and adjust it to its
costly. Mounting the sprinklers accurately can take consid- (VDS = German Association of Property Insurers) is first time and during normal use, make sure concentra- port structure of the suspended ceiling using the supplied final mounting position. The possible mounting positions
erable time depending on the predetermined ceiling layout PN 10 bar. The pressure rating of FM-approved systems tions of corrosive constituents in the water, such as chlori- metal fixing components (lay-in systems, metal panel cei-
INSTALLATION DIAGRAM depend on the horizontal and vertical distance from the
and ceiling system. The flexibility of HYDRA® stainless (FM = Factory Mutual Research Corp.) is PN 175 psi des, fluorides, etc., over 50 ppm (50 mg/l) cannot occur in lings) or with fixing components from the range supplied hose outlet on the supply pipe and are given in the table
steel hoses allows the installer to position the sprinkler (approximately 12.3 bar). The relevant approvals are the region of the sprinkler hoses. During installation, it is by the ceiling system manufacturer (cross connectors from below. The hose must not have a sharp bend immediately
anywhere within a circular area determined by the length only valid for the ceiling systems stated in our technical important to prevent foreign material such as dirt, rust Concrete ceiling
the Knauf system, spring clips from the OWA S9 system, after the joint fittings.
of the hose, so there is absolutely no problem accurately product descriptions. The company who installs the particles or metal swarf (chips), entering into HYDRA® etc.) so they are locked into each other and/or clamped
positioning the sprinkler in suspended ceilings of different sprinkler system is responsible for ensuring that the sprinkler hoses, due to the risk of corrosion. Make sure the together.
types. HYDRA® sprinkler mounting systems are only used in hoses are protected from corrosion due to foreign material
Compared to the conventional installation methods used conjunction with these ceiling systems. through suitable measures such as flushing out the piping,
in the past, where the installer has to fabricate appropriate In the case of lay-in systems, the supplied metal fixing
installing filters upstream of the sprinklers, etc.
bends in the piping, these hoses enable a considerable ®
HYDRA sprinkler mounting systems are recognised and Suspended plates are fitted to the stud bolts situated on both sides of
If your installation or operating conditions deviate from ceiling
saving of cost and time in their mounting. The supplied approved for use in the following ceiling systems: the special holder and hooked or pushed into the holes of
the specifications mentioned above, refer to the manufac-
HYDRA® special holders enable easy alignment and the support rails so they are locked together. Wing nuts
turer for technical advice.
mounting of the sprinkler in the ceiling element and T-bar lay-in systems for mineral fibre panels are then used to fasten the fixing components to the
precise vertical positioning of the sprinkler according Please refer to the appropriate table for distance x (see base plate of the special holder.
to the manufacturer’s specifications. back page).
T-bar lay-in systems for cassette-type 3. INSTALLATION The special holders for strip grid systems are simply
metal ceiling tiles pressed into the support rails until the laterally projecting
3.1. Sealing the sprinkler 3.3. Preparing and installing the ceiling elements metal plates engage and lock in.
The sprinkler must be sealed into the fixed sleeve of the The ceiling element on
Plasterboard ceiling systems
sprinkler hose. The maximum permissible torque is 40 which you intend to In the case of clean-room ceiling systems and department
Nm. After sealing, the sprinkler should be fitted with a cap mount the sprinkler must store ceiling systems, place the sprinkler hoses flat against
to protect it from damage. If you are using a two-piece be provided with a hole at the upper side of the support rails using the fixing plates
Strip grid ceiling systems
rosette, make sure you fit the spring washer that belongs the installation position; attached to the hose and then screw tight to the support
to the rosette. the diameter of the hole rail with T-head bolts.
depends on the type of
Department store ceiling systems
sprinkler and rosette. Re- Please refer to the appropriate table for distance x (see
3.2. Hose assembly install the ceiling element In the case of metal panel ceiling systems, firstly fit the
The hose is connected to the main supply pipe by threa- with the hole in accordance supplied fixing plates onto the stud bolts situated on both
Metal panel ceiling systems ded joint. The outlets for the sprinkler hose should be sides of the special holder and fasten with the two wing
with the instructions of the
positioned on the side of the supply pipe so that the hose ceiling system manufactu- nuts.
leaves the supply pipe parallel to the concrete ceiling (see rer. In the case of lay-in The holder is then simply hooked into the profile of the
Clean-room ceiling systems diagram). We recommend a distance (B) of at least 100 metal panel and locked in.
systems, make sure the
mm between the concrete ceiling and the centre of the ceiling panel mounting
outlet for the sprinkler hose; this distance should not be rails (T-bars) are of the
less than 50 mm. Where space is restricted at the position perforated type.