Air distribution systems. Jet nozzle DW-N2... Swivel jet nozzle DW-V2... Twist nozzle DW-V2-...-DR

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1 Air distribution systems Jet nozzle DW-N... Swivel jet nozzle DW-V... Twist nozzle DW-V-...-DR DS E 01.

2 Jet nozzle and twist nozzle Preliminary remarks Jet nozzle DW N Swivel jet nozzle DW V Twist nozzle DW V... DR To air condition large spaces where the air diffusers have to be placed in walls or gallery parapets, it is advisable to use nozzles. The supply air jet pattern depends on the nozzle size, the dis- charge velocity, the temperature difference between supply air and indoor air, and the discharge angle. In many cases, the jet pattern can be well predicted with the help of the diagrams contained in this selection brochure. If the use 1b 1a 1 Swivel range 1 of the spaces to be supplied with air is not yet established or if it may change, then it is advisable to use swivel jet nozzles which Fig. 1: Construction design enable a resetting of both the discharge angle and the discharge direction and can therefore be adjusted to the prevailing loads in an optimal way. In spaces where the supply air will be used both for heating and cooling, it is best to adjust the discharge angle to the respective cooling or heating load using an electric actuator or a self-acting Jet nozzle mounted in the parapet of a gallery thermostatic control unit. Typical applications for jet nozzles are large spaces or halls such as exhibition halls, shopping centres, airports, multipurpose or concert halls, in which the air jet achieves long throws at low sound power levels. The throw of the swivel jet nozzle can be considerably reduced by mounting a twist element on the air in- Jet nozzles mounted in two opposite walls take side. The twist element is not visible from the room. For architectural reasons, jet nozzles with and without twist element are often placed adjacent to each other in order to get unity of appearance. Jet nozzle combined with twist nozzle, mounted in a wall A reduction of the jet penetration depth by using the twist nozzle makes sense in long and narrow rooms, for instance, if the distance to the opposite wall is too short for the use of jet nozzles. Where high specific supply air volume flow rates per metre are required, it is advisable to combine twist nozzles and jet nozzles. The following table gives an overview of the volume flow rate ranges correlated with the nozzle sizes. Jet nozzle Twist nozzle Size Air volume flow rate Air volume flow rate V min V max V min V max DN 0 0 DN 0 1 DN DN DN DN Fig. : Examples of arrangement Construction design and function Fig. 1, left, shows the non-adjustable jet nozzle DW-N. It is made up of the nozzle body 1a, featuring optimized air flow pattern and acoustics, with a flange 1b on the air intake side. Fig. 1, middle, shows the swivel jet nozzle DW-V. Its main component is the nozzle 1 housed in the hemispheric casing. This nozzle, which is linked to a fastening flange, can swivel by ± around the horizontal swivel axis. It is also possible to alter the air discharge direction sideways since the fastening flange can be adjusted by ± in the vertical plane, which modifies the position of the swivel axis. The flange is concealed by a removable collar. As an option the swivel jet nozzle can be fitted with an electric actuator or a thermostatic control unit (see page ) to enable automatic swivelling. Fig. 1, right, shows the twist nozzle which is fitted with a twist element on its intake. DS E p. 01.

nozzles allows for the following temperature differences between supply air and indoor air: K when cooling, + K when heating. Twist nozzle For short throws up to approx.

3 Jet nozzle and twist nozzle Specifications for layout and selection Fig. : Jet dispersion with jet nozzle Fig. : Jet dispersion with twist nozzle Jet nozzle With throws up to a maximum of m and taking account of the requisite mounting height and minimum centre distances between the nozzles, the layout of jet nozzles allows for the following temperature differences between supply air and indoor air: K when cooling, + K when heating. Twist nozzle For short throws up to approx. m twist nozzles are suitable for the following mounting heights and minimum centre distances at the following temperature differences between supply air and indoor air: K when cooling, + K when heating. Size DN 0 DN 0 DN 0 DN 0 DN 0 DN 0 Min. mounting height H in m Max. mounting height H in m Min. nozzle centre distance 1) t min in m Size DN 0 DN 0 DN 0 DN 0 DN 0 Min. mounting height H in m Max. mounting height H in m Min. nozzle centre distance 1) t min in m DS E p. 01. The graphs on pages and show the induction ratio, the jet deflection as well as the decrease in jet velocity and jet temperature in relation to the jet path. The discharge direction of the swivel jet nozzle can be readjusted when tuning the HVAC system. The recoended jet angle is as follows: in cooling mode: upwards in heating mode: downwards (Also see Table on page ). 1) Distance recoended to comply with indoor air velocities needed for thermal comfort Discharge velocity u in m/s Discharge velocity u in m/s 9 1 DN 0 DN 0 DN 0 DN 0 DN 0 DN 0 DN 0 DN 0 DN 0 DN 0 Jet nozzle Twist nozzle DN 0 Fig. : Throws of jet nozzle and twist nozzle correlated with the discharge velocity

Jet nozzle Adjustment to thermal load For electrical adjustment, the jet nozzles must be equipped with actuators.

control graph. Thermostatic control (available for nozzle sizes DN 0) obviates the need for a central control system and nozzle wiring.

The thermostatic control unit is filled with expandable material and works within a supply air temperature range from to C (standard model).

With extended ductwork, significant temperature differences are likely to occur and to impair both thermal comfort and heating-up periods.

Fig : DW-N Left: with push-in end and seal for circular ducts to EN 0 (spiral seam ducts) Right: with slip-on end for shaped parts to EN 0 b) Swivel jet nozzle DW-V and

4 Jet nozzle Adjustment to thermal load For electrical adjustment, the jet nozzles must be equipped with actuators. The discharge angle of the supply air will be set on the basis of the measured supply and indoor air temperatures, using the building management systems and an appropriate control graph. Thermostatic control (available for nozzle sizes DN 0) obviates the need for a central control system and nozzle wiring. Each jet nozzle is fitted with a thermostatic control unit which gets energy for adjustment from the supply air temperature. The thermostatic control unit is filled with expandable material and works within a supply air temperature range from to C (standard model). Another advantage of this control unit is that the supply air temperature is measured inside the nozzle, not at a central point such as behind the HVAC system. With extended ductwork, significant temperature differences are likely to occur and to impair both thermal comfort and heating-up periods. This is precluded by the thermostatic control unit. Fig : DW-N Left: with push-in end and seal for circular ducts to EN 0 (spiral seam ducts) Right: with slip-on end for shaped parts to EN 0 b) Swivel jet nozzle DW-V and twist nozzle DW-V-...-DR Fig : DW-V with thermostatic control unit Fig. 9: Left: Right: DW-V with flange and collar for connection to pressurized plenum or rectangular duct with connector for flexible duct Connection types a) Non-adjustable jet nozzle DW-N Fig. : DW-N with flange for connection to pressurized plenum or rectangular duct Fig. : DW-V Left: with push-in end and seal for circular ducts to EN 0 (spiral seam ducts) Right: with slip-on end for shaped parts to EN 0 DS E p. 01.

Jet nozzle www.krantz.de DS E p. 01. Instructions for mounting and adjusting the nozzles 1) 1.

b) Swivel jet nozzle After removing the collar, insert the jet nozzle into the duct wall cutout and fasten it with adjusting screws (see sketch on page ).

5 Jet nozzle DS E p. 01. Instructions for mounting and adjusting the nozzles 1) 1. Connection to pressurized plenum or rectangular duct, connection type K a) Non-adjustable jet nozzle Fasten the nozzle to the pressurized plenum or the rectangular duct using the flange 1b. b) Swivel jet nozzle After removing the collar, insert the jet nozzle into the duct wall cutout and fasten it with adjusting screws (see sketch on page ). By turning the fastening flange through an angle of maximum ±, it is possible to alter the position of the swivel axis and thus to adjust the air discharge direction sideways. A scale with -degree division at the slot segments a facilitates accurate adjustment. Then secure the nozzle at the fastening points. The mounting surface should be even.. Insertion into circular ducts to EN 0, connection type R For connection type R, both the swivel and the non-adjustable jet nozzles are fitted with a push-in end 9 and a seal.. Connection to shaped parts to EN 0, connection type F For connection type F, both the swivel and the non-adjustable jet nozzles have a slip-on end matching shaped parts to EN 0. Remark on connection types R and F: To adjust the discharge direction sideways with swivel jet nozzles provided for connection type R or F, turn the push-in or slip-on end of the nozzle. If the relevant end is fitted with a seal, a customary lubricant can be used to help turn the nozzle, in particular with large connection diameter. Once adjustment is completed, the nozzle should be additionally secured by screws.. Connection to flexible duct, connection type B With connection type B (only for manual adjustment), the flexible duct is slipped onto the connector and the jet nozzle is set to the desired position only once. The nozzle is then fastened as described for connection type K.. Design with thermostatic control unit The thermostatic control unit adjusts the angle of inclination of the swivel jet nozzle in correlation with the supply air temperature (see Fig. ). Only the heat content of the supply air acts as driving power for the control unit; no further energy supply is needed. In the basic setting of the swivel range, the air discharge angle of the jet nozzle is to the horizontal (with the jet nozzle being mounted on a vertical surface) in heating mode at supply air temperatures > C. In cooling mode, if the supply air temperatures are < C, a discharge angle of + is adjusted. In between, adjustment is almost linear (see Fig. ). The swivel range can also be easily altered manually, even once the swivel jet nozzle is installed; this is possible in increments of and up to in total see Fig.. The mechanism of the thermostatic control unit is protected from undue application of force by a device that can disengage and engage again when the nozzle is swivelled by hand. In heating mode, the supply air jet should be discharged rather flat at low nozzle mounting heights; from greater heights it should be discharged more sharply downwards. The following table shows the recoended setting parameters (angle settings of jet nozzle to the horizontal with vertical nozzle mounting). Mounting height Angle of inclination in degrees in m Cooling mode Heating mode Supply air temperature Supply air temperature C ³ C < + + > + Jet nozzle inclination to the horizontal in degrees Cooling 0 Heating 1 Supply air temperature in C Heating Fig : Inclination of jet nozzle correlated with supply air temperature in basic setting ('hysteresis') Cooling 1) See key on page Fig : Subsequent alteration of discharge angle in increments of (up to in total)

6 Jet nozzle Dimensions of DW-N Connection to a pressurized plenum DW N DN K ø D -N ø D -N 1a 1b H Connection to a circular duct DW N DN R ø D -N ø D -N 9 Size H 1 H 1 ø D -N 1) H H 1a 1a ø D -N Connection to a shaped part DW N DN F ø D -N ø D -N H H 1 Connection type K Weight in kg Connection type R or F DN DN DN DN 0 0 Key for all pages 1 Nozzle 1a Nozzle body 1b Flange Hemisphere Fastening flange a Slot segment ) b Brush seal c Flange seal Swivel axis Collar Adjusting screw ) Scale of degrees ) Fastening point ) 9 Push-in end Slip-on end Electric actuator Thermostatic control unit Connection duct Shaped part Locking screw Twist element Connector for flexible duct DN DN DS E p ) Wall or duct cutout ) Only for connection to a pressurized plenum (for swivel jet nozzle and twist nozzle)

7 Jet nozzle Dimensions of DW-V and DW-V-...-DR 9 Hemisphere Connection to a circular duct DW V DN R Connection to a pressurized plenum DW V DN K (with electric actuator) Hemisphere ø D -V ø D -V ø D -V ø D -V A 1 Swivel range Swivel range H H H max H L M H max ø D -V (inside) Hemisphere Connection to a shaped part DW V DN F ø D -V Connection to a pressurized plenum DW V DN K (with thermostatic control unit) ø D -V A 1 min 1 Hemisphere ø D -V Swivel range Swivel range DS E p. 01. ø D -V ø D Size H H H max H H max ø D ø D -V 1) ø D -V Hemisphere Swivel range Connection to a flexible duct ) DW V DN B ø D -V ø D -V b c Section B - B B L T A min B D H max H H max a View A: Collar removed Swivel jet nozzle DW-V and twist nozzle DW-V-...-DR ) DW-V DW-V-...-DR ø D -V H max H max H DN DN DN DN DN H A 1 min A min L M ) L T W ) kg ø D ø D DN ) Wall or duct cutout ) Weight without actuator; actuator weight = approx. 0.9 kg ) Twist nozzle available in DN 0 and over ) Only for manual adjustment

8 Jet nozzle Layout sheet for DW-N Discharge velocity u in m/s DN 0 DN 0 Note: The diagram values for sound power level apply to connection type K (pressurized plenum). With connection to a straight circular duct (type R or F), the sound power level is 1 db(a) higher, and even db(a) higher when connected to an elbow. The pressure drop values apply to connection types K, R and F as well as behind an elbow. DN 0 DN 0 DN 0 DN 0 DN 0 DN Sound power level of DW-N Nozzle volume Discharge Sound power level L W in db ref. - W flow rate velocity L WA Octave band centre frequency in Hz m/s db(a) K K DN 0 DN 0 1 DN DN 0 DN 0 0 DN DN 0 DN DN DN 0 DN 0 DN 0 DN DN 0 DN Sound power level L WA in db(a) ref. - W DN 0 DN 0 DN Total pressure drop p t in Pa DN 0 DN 0 DN 0 DS E p DN 0 V min = 0 0 DN Sound power level L WA in db(a) ref. - W 0 0 Total pressure drop p t in Pa

9 Swivel jet nozzle Layout sheet for DW-V Note: The diagram values for sound power level apply to connection type K (pressurized plenum) at a nozzle angle of inclination a = 0. The larger the angle of inclination a, the higher the sound power level, e.g.: a = +1 db(a) a = + db(a) With connection type R or F to a straight circular duct with L ³ DN, the sound power level is 1 db(a) higher, and even db(a) higher when connected to an elbow. The pressure drop values apply to connection types K, R and F, and a nozzle angle of inclination a = 0 to. With an elbow these values are to be raised by %. Discharge velocity u in m/s 9 DN 0 DN 0 DN 0 DN 0 DN 0 DN 0 Layout example for connection to a pressurized plenum, without actuator: 1 Supply air volume flow rate V = 000 Requisite throw W = m Angle of inclination a = Max. allowable sound power level L WA = db(a) ref. - W From diagram: Size = DN 0 selected Volume flow rate = 0 Sound power level L WA = db(a) ref. - W at 0 L WA = db(a) ref. - W at Total pressure drop Dp t 0 Pa 9 Number Z = 9 units [from 1 : ] Discharge velocity u =. m/s DN DN 0 DN 0 Nozzle model without actuator with actuator Also see above note DN 0 DN 0 0 DN 0 DN 0 DN 0 DS E p DN DN 0 DN Nozzle model without actuator with actuator Also see above note 0 0 Sound power level L WA Total pressure drop p t in Pa in db(a) ref. - W DN 0 DN 0 DN 0 Nozzle model without actuator with actuator Also see above note DN 0 DN 0 DN DN 0 DN 0 V min = Nozzle model with and without actuator Also see above note 0 0 Sound power level L WA Total pressure drop p t in Pa in db(a) ref. - W 9

10 Swivel jet nozzle Sound power level of DW-V Angle of inclination Nozzle volume flow rate Discharge velocity Sound power level L W in db ref. - W Sound power level L W in db ref. - W L WA Octave band centre frequency in Hz L WA Octave band centre frequency in Hz a m/s db(a) K K K db(a) K K K DN 0 Without actuator With actuator 1) DN 0 Without actuator With actuator 1) DN 0 Without actuator With actuator 1) DN 0 Without and with actuator 1) DN 0 Without and with actuator 1) DN 0 Without and with actuator 1) Sound power level Thanks to its excellent acoustic properties the swivel jet nozzle is most suitable for use in large spaces with high acoustic requirements such as concert halls, theatres, conference rooms, museums, etc. The sound power levels listed here apply to connection type K (pressurized plenum). With connection type R or F to a straight circular duct with L ³ DN, the sound power level is 1 db(a) higher, and even db(a) higher with an elbow. Increase in sound power level DL in relation to air velocity u L when mounted in a rectangular duct u L in m/s DL in db ) Actuator running noise < db(a) DS E p. 01.

11 Jet nozzle 0 Induction ratio Jet volume flow rate/supply air volume flow rate V / DN 0 DN 0 DN 0 DN 0 DN 0 DN Jet path L in m Induction ratio Example: Size DN 0 Jet path L = m From graph: Induction ratio Jet/Supply air volume flow rate V / =, i.e. mixing of 9-fold indoor air volume flow rate after m jet path Jet deflection Jet path L = m Temperature difference supply air to indoor air ZL RL = K 9 ZL-RL for heating and cooling (hence no plus/minus sign) DS E p. 01. DN 0 DN 0 DN 0 DN 0 DN 0 DN Jet deflection y in m +y Heating mode y Cooling mode L Nozzle volume flow rate Example: Size DN 0 Nozzle volume flow rate = 0 Temperature difference supply air to indoor air DJ ZL RL = + K (Heating) From graph: Jet path L = m Jet deflection y +1.1 m after m jet path

Jet nozzle Decrease in jet velocity 1).0 Decrease in jet temperature.0 Jet velocity u in m/s.0 1.0 0. 0. 0. 0. Jet path L = m Temperature difference air jet to indoor air STR RL in K.0 1.0 0. 0. 0. 0. Jet path L = m DN 0 DN 0 DN 0 DN 0 DN 0 DN 0 0.

12 Jet nozzle Decrease in jet velocity 1).0 Decrease in jet temperature.0 Jet velocity u in m/s Jet path L = m Temperature difference air jet to indoor air STR RL in K Jet path L = m DN 0 DN 0 DN 0 DN 0 DN 0 DN Nozzle volume flow rate Example: Size DN 0 Nozzle volume flow rate = 0 (u 0 =. m/s) Jet path L = m From graph: Decrease in discharge velocity to jet velocity u 0 =. m/s u = 0. m/s after m jet path 0.1 DN 0 DN 0 DN 0 1. DN 0 1 DN DN Temperature difference supply air to indoor air ZL RL in K Example: Size DN 0 Temperature difference supply air to indoor air DJ ZL-RL = K Jet path L = m From graph: Decrease in temperature difference DJ ZL-RL = K to DJ Str-RL = 0. K after m jet path 1) Jet velocity in the jet axis at the respective points of observation on the jet paths DS E p. 01.

13 Twist nozzle DW-V-...-DR Layout sheet and sound power level The decrease in jet velocity can be determined using the graph on page. For this purpose, the jet path of the twist nozzle must be multiplied by 0.. Example: jet velocity u = 0. m/s with DN 0 and V = 9 [0 m³/h] results in jet path L = m (for DW-V) which, multiplied by factor 0., results in a jet path of m with the twist nozzle. Discharge velocity u in m/s 1 DN 0 DN 0 DN 0 DN 0 DN 0 V m A /h DN 0 DN 0 DN 0 DN 0 DN DN 0 DN 0 DN 0 DN 0 DN 0 DN 0 DN 0 DN 0 DN 0 DN Sound power level L WA Total pressure drop p t in Pa in db(a) ref. - W Layout example: 1 Supply air volume flow rate V = 1 From graph: Size = DN 0 selected Maximum throw W = m Volume flow rate = Max. allowable sound power level L WA = db(a) ref. - W Sound power level L WA db(a) ref. - W Total pressure drop Dp t Pa Number Z = units [from 1 : ] 9 Discharge velocity u =.9 m/s Sound power level of DW-V-...-DR DS E p. 01. Size DN 0 DN 0 DN 0 DN 0 DN 0 Nozzle volume flow rate Discharge velocity Total pressure drop m/s Pa L WA db(a) ref. - W 9 9 Sound power level L W in db ref. - W Octave band centre frequency in Hz K K K Increase in sound power level DL in relation to air velocity u L when mounted in a rectangular duct u L in m/s.0..0 DL in db u L in m/s DL in db

14 Jet nozzle and twist nozzle Features and type code Features at a glance Type code General features Installation in the wall of a pressurized plenum or rectangular duct Insertion into circular ducts to EN 0, with seal Connection to shaped parts to EN 0, with slip-on end Swivel jet nozzle with concealed fastening screws Flexible duct connection for manual adjustment also available Adjustment options: manually, by electric actuator or, without auxiliary energy, by maintenance-free thermostatic control unit The thermostatic control unit allows for resetting; the swivel range can be altered in increments of, up to in total. The mechanism of the thermostatic control unit is protected from undue application of force by a device that can disengage and engage again when the nozzle is swivelled by hand. Material: Nozzle: aluminium Slip-on and push-in ends: galvanized sheet metal Twist element: black-painted sheet metal Colour: aluminium in natural colour or painted to a RAL colour Unobtrusive placement possible, e.g. behind the wall finish Jet nozzles Throws up to m Available in sizes for volume flow rates up to 90 [ 0 ] Very low sound power level Low pressure drop, swivel nozzle: = 1. non-adjustable nozzle: = 1.0 related to discharge velocity Twist nozzles Throws up to m Available in sizes for volume flow rates up to 9 [1 ] DW - DN Jet nozzle Function / Kind Size Option Function / Kind N = non-adjustable V = swivel type Adjustment Surface finish Accessories Size 0 = DN 0 0 = DN 0 0 = DN 0 0 = DN 0 0 = DN 0 0 = DN 0 Option K = connection to pressurized plenum (duct wall) F = for slipping onto shaped part R = for pushing into circular duct B = connector for connection to flexible duct (DW-V only) 1) Adjustment (DW-V only) DN 0 DN 0 DN 0 DN 0 DN 0 DN 0 MA = manual E = Siemens actuator, 0 V modu- lation, stroke drive type GDB1.E E = Siemens actuator, -point type, V, stroke drive type GDB1.E E = Siemens actuator, -point type, V, stroke drive type GDB1.E E = Siemens actuator, 0 V modula- tion, stroke drive type GLB1.E E = Siemens actuator, -point type, V, stroke drive type GLB1.E E = Siemens actuator, -point type, V, stroke drive type GLB1.E T1 = Thermostatic control unit, C Surface finish 0 = no coating. = face painted to RAL. DS E p ) Only suitable for manual adjustment Accessories (DW-V only) O = none DR = with twist element (from DN 0 upwards)

Jet nozzle and twist nozzle Tender text Fig. : DW-N Fig. : DW-V Fig. : DW-V-...-DR Fig. : DW-V with Fig. : DW-V with electric actuator thermostatic control unit Tender text Jet nozzle DW-N 1).

Connection type K with flange for connection to a pressurized plenum or a rectangular duct. Connection type R with push-in end for insertion into a circular duct to EN 0, with seal.

.. Push-in and slip-on ends made of galvanized sheet metal Make: Type: KRANTZ KOMPONENTEN DW - N DN direction can be adjusted manually, by electric actuator or, without auxiliary energy, by a

With thermostatic control unit, the factory-set swivel range can be altered manually once the swivel jet nozzle is installed; this is possible in increments of and up to in total.

15 Jet nozzle and twist nozzle Tender text Fig. : DW-N Fig. : DW-V Fig. : DW-V-...-DR Fig. : DW-V with Fig. : DW-V with electric actuator thermostatic control unit Tender text Jet nozzle DW-N 1)... units Non-adjustable jet nozzle for air distribution into large spaces, with rounded intake featuring good aerodynamic and acoustic properties. Connection type K with flange for connection to a pressurized plenum or a rectangular duct. Connection type R with push-in end for insertion into a circular duct to EN 0, with seal. Connection type F with slip-on end for shaped parts to EN 0. Material: Nozzle body made of aluminium in natural colour or painted to RAL... Push-in and slip-on ends made of galvanized sheet metal Make: Type: KRANTZ KOMPONENTEN DW - N DN direction can be adjusted manually, by electric actuator or, without auxiliary energy, by a self-acting thermostatic control unit. With thermostatic control unit, the factory-set swivel range can be altered manually once the swivel jet nozzle is installed; this is possible in increments of and up to in total. The mechanism of the thermostatic control unit is protected from undue application of force by a device that can disengage and engage again when the nozzle is swivelled by hand. Connection type K with flange for connection to a pressurized plenum or a rectangular duct, inclusive of collar to conceal the fastening screws. Connection type R with push-in end for insertion into a circular duct to EN 0, with seal. Connection type F with slip-on end for shaped parts to EN 0. Connection type B with connector for flexible duct. Material: Nozzle body and collar made of aluminium in natural colour or painted to RAL... Push-in and slip-on ends made of galvanized sheet metal Twist element ) made of galvanized sheet metal, black-painted Swivel jet nozzle DW-V, Twist nozzle DW-V-...-DR Make: Type: KRANTZ KOMPONENTEN DW - V DN DS E p units Swivel jet nozzle with rounded intake featuring good aerodynamic and acoustic properties, housed in a hemispheric casing with opposite swivel bearings, swivel range ±, designed as jet nozzle with large jet penetration depth for air distribution into large spaces, discharge direction adjustable in the horizontal and vertical planes, or twist nozzle ) with small jet penetration depth for air distribution into narrow spaces, with built-on twist element, fitted with: fastening flange to accoodate the hemisphere and the nozzle, turnable within slot segments for setting the discharge direction as required; a scale with -degree division helps set the discharge direction accurately when tuning the HVAC system. The discharge Subject to technical alterations. 1) Available with twist element on request ) Available for size DN 0 up to DN 0

16 Distributore in esclusiva per l Italia: F.C.R. Filtrazione Condizionamento Riscaldamento SpA Via E. Fermi, - 09 Cinisello Balsamo (MI) - Italy phone fax fcr@fcr.it

Krantz Components. Twist outlet DD-N... for ceiling installation. Air distribution systems

Krantz Components. Twist outlet DD-N... for ceiling installation. Air distribution systems Krantz Components Twist outlet DD-N... for ceiling installation Air distribution systems DS E 0. Twist outlet Preliminary remarks and construction design Preliminary remarks Twist outlets for ceiling installation