CAV controllers Type RN

Transcription

1 2.1 X X testregistrierung CAV controllers Type For the precise control of constant volume flow rates Circular self-powered volume flow controllers for the control of supply air or return air in constant air volume systems Volume flow rate can be set using an external scale, no tools required High control accuracy No on-site test measurements required for commissioning Suitable for airflow velocities of up to 2360 fpm Any installation orientation; maintenance-free Casing air leakage to EN 1751, class C Actuator for switching between setpoint values Optional equipment and accessories Acoustic cladding for the reduction of case-radiated noise Secondary silencer Type CA, CS or CF for the reduction of air-regenerated noise Hot water heat exchanger Type WL and electric air heater Type EL for rehea ting the airflow Actuator for switching between setpoint values CAV controller -S Compact height K

2 General information Type General information Page Order code Aerodynamic data Quick sizing Dimensions and weight -S Dimensions and weight Dimensions and weight -D Dimensions and weight -FL Dimensions and weight -D-FL Specification text Variants CAV controller variant -S, compact height CAV controller variant Product examples CAV controller variant -D CAV controller variant, with actuator for switching between setpoint values K

3 General information Description CAV controller variant Application Circular CONSTANTFLOW CAV controllers of Type for the precise supply air or extract air flow control in constant air volume systems Mechanical self-powered volume flow control without external power supply Simplified project handling with orders based on nominal size Volume flow rate setpoint can be set on external scale Switching between min and max using optional actuator Variants -S: Compact-height volume flow controller : Volume flow controller -D: Volume flow controller with acoustic cladding -FL: Volume flow controller with flanges on both ends -D-FL: Volume flow controller with acoustic cladding and flanges on both ends Units with acoustic cladding and/or a secondary silencer Type CA, CS or CF for demanding acoustic requirements Acoustic cladding cannot be retrofitted Construction Galvanised sheet steel P1: Powder-coated, silver grey (RAL 7001) A2: Stainless steel Nominal sizes -S: 3", 4", 5" : 3", 4", 5", 6", 8",10", 12", 16" -FL: 4", 5", 6", 8",10", 12", 16" Nominal sizes 3", 6" and 12" require transition pieces to accommodate standard ductwork Attachments Min/Max actuators: Actuators for switching between minimum and maximum volume flow rate setpoint values Modulating actuators: Actuators for the stepless adjustment of volume flow rates or to switch between minimum and maximum volume flow rate setpoint values Retrofit kits: Actuators and installation accessories Accessories Lip seals on both ends (factory fitted) Matching flanges for both ends Useful additions Secondary silencer Type CA, CS or CF Heat exchanger Type WL Electric air heater Type EL Special features Volume flow rate can be set using an external scale; no tools required High volume flow rate control accuracy Any installation orientation Parts and characteristics Ready-to-commission controller Damper blade with low-friction bearings Bellows that acts as an oscillation damper Cam plate with leaf spring Scale with pointer to set the volume flow rate setpoint Aerodynamic function testing of each unit on a special test rig prior to shipping Correct operation even under unfavourable upstream conditions (1.5 D straight section required upstream) Construction features Circular casing Spigot connection suitable for circular ducts to EN 1506 or EN Spigot connection with groove for lip seal (- P1/80 without groove) -FL: Circular flanges to EN Materials and surfaces Casing and damper blade made of galvanized sheet steel Leaf spring made of stainless steel Polyurethane bellows Plain bearings with PTFE coating -D Acoustic cladding made of galvanised sheet steel Rubber profile for the insulation of structureborne noise Lining is made of mineral wool Mineral wool To EN 13501, fire rating class A2, noncombustible RAL quality mark RAL-GZ 388 Biosoluble and hence hygienically safe according to the German TRGS 905 (Technical Rules for Hazardous Substances) and EU directive 97/69/EG Installation and commissioning Any installation orientation Volume flow rate can be set using an external scale; no tools required No repeat measurements or adjustments by an air conditioning engineer are necessary Standards and guidelines Hygiene conforms to VDI 6022 Casing air leakage to EN 1751, class C Maintenance Maintenance-free as construction and materials are not subject to wear K

4 General information Technical data Nominal sizes 3-16 inches Volume flow rate range CFM Volume flow rate setting range approx % of the nominal volume flow rate Scale accuracy approx ± 4 % of the nominal volume flow rate Differential pressure in w.g. Operating temperature F Function Functional description The volume flow controller is a mechanical selfpowered unit and works without external power supply. A damper blade with low-friction bearings is adjusted by aerodynamic forces such that the set volume flow rate is maintained within the differential pressure range. The aerodynamic forces of the airflow create a closing torque on the damper blade. The bellows extends and increases this force while at the same time acting as an oscillation damper. The closing force is countered by a leaf spring that unrolls over a cam plate. The shape of the cam plate is such that a change in the differential pressure leads to an adjustment of the damper blade in a way that the volume flow rate is maintained almost exactly. Efficient commissioning The volume flow rate setpoint value can be set quickly and easily using the pointer on the external scale; no measurements are required. The advantage over flow adjustment dampers is that there is no need for repeat measurements or adjustments by an air conditioning engineer. Should the system pressure change, e.g. by opening or closing of duct sections, the flow rates in the entire system will also change if flow adjustment dampers are used; however, this is not the case with mechanical self-powered volume flow controllers. A mechanical self-powered controller reacts immediately and adjusts the damper blade such that the set constant volume flow rate is maintained. Schematic illustration of the Damper blade 2 Bellows 3 Bellows inlet 4 Crossbar 5 Leaf spring 6 Cam plate 7 Volume flow rate scale lock 8 Volume flow rate scale 9 Lip seal K

5 Order code Order code -S -S P1 / 100 / D2 Type -S Volume flow controller Material No entry: galvanized sheet steel P1 Powder-coated, silver grey (RAL 7001) A2 Stainless steel Size Nominal Diameter 80 3"* 100 4" 125 5" *Nominal size 3" requires transition piece for US ductwork Accessories D2 Lip seals on both ends D P1 FL / 160 / G2 / B50 / Type Accessories Volume flow controller D2 Lip seals on both ends Acoustic cladding G2 Matching flanges for both ends D With acoustic cladding Actuator Material B50 Min/Max switching, 24 V AC/DC No entry: galvanized sheet steel supply voltage P1 Powder-coated, silver grey (RAL 7001) B52 Min/Max switching, 24 V AC/DC A2 Stainless steel supply voltage, with auxiliary switch Flange B60 Min/Max switching, 230 V AC supply voltage B62 Min/Max switching, 230 V AC FL Flanges on both ends supply vol tage, with auxiliary switch Size Nominal Diameter B70 Variable adjustment, 24 V AC/DC 80 3"** supply voltage 100 4" B72 Variable adjustment, 24 V AC/DC 125 5" supply voltage, with auxiliary switch 160 6"** 200 8" Volume flow rates [CFM] " only actuators "** min max for factory setting " **Nominal size 3", 6" and 12" require transition piece for US ductwork Order examples -S/100/D2 Nominal size... 4" Material...galvanized sheet steel Accessories... lip seals on both ends -D-FL/250/G2/B50 Acoustic cladding...with acoustic cladding Flanges... on both ends Material...galvanized sheet steel Nominal size... 10" Accessories... matching flanges for both ends Actuator... B50 K

6 Aerodynamic data Volume flow rate ranges The minimum differential pressure of CAV controllers is an important factor in designing the ductwork and in rating the fan including speed control. Sufficient duct pressure must be ensured for all operating conditions and for all terminal units. The measurement points for the speed control must be selected accordingly. Volume flow rate ranges and minimum differential pressure values Nominal size p st min l/s CFM in w.g. in w.g. in w.g. in w.g. ± % with secondary silencer CS/CF, insulation thickness 50 mm, length 500 mm with secondary silencer CS/CF, insulation thickness 50 mm, length 1000 mm with secondary silencer CS/CF, insulation thickness 50 mm, length 1500 mm K

7 Aerodynamic data Upstream conditions The volume flow rate accuracy Δ applies to a straight upstream section of the duct. Bends, junctions or a narrowing or widening of the duct cause turbulences that may affect measurement. Duct connections, e.g. branches off the main duct, must comply with EN Some installation situations require straight duct sections upstream. Free air intake only with a straight duct section of 1D upstream. Bend 1D A bend with a curvature radius of at least 1D without an additional straight duct section upstream of the CAV controller has only a negligible effect on the volume flow rate accuracy. D Junction 1,5D 1.5D A junction causes strong turbulences. The stated volume flow rate accuracy Δ can only be achieved with a straight duct section of at least 1.5D upstream. Shorter upstream sections require a perforated plate in the branch and before the CAV controller. If there is no straight upstream section at all, the control will not be stable, even with a perforated plate. D K

8 Quick sizing Air-regenerated noise Quick sizing tables provide a good overview of the room sound pressure levels that can be expected. Approximate intermediate values can be interpolated. Precise intermediate values and spectral data can be calculated with our Easy Product Finder design program. The first selection criteria for the nominal size are the actual volume flow rates min and max. The quick sizing tables are based on normally accepted attenuation levels. If the sound pressure level exceeds the required level, a larger VAV terminal unit and/or a silencer is required. Quick sizing: Sound pressure NC level at differential pressure 0.6 in w.g. Nominal size Air-regenerated noise Case-radiated noise L P NC L P NC1 L P NC2 L P NC3 l/s CFM NC <15 <15 18 < <15 <15 20 < < < <15 <15 <15 < <15 15 < < < <15 <15 <15 < <15 < < < < < < < < < < < < < < < < < < with secondary silencer CS/CF, insulation thickness 50 mm, length 500 mm 3 with secondary silencer CS/CF, insulation thickness 50 mm, length 1000 mm 4 with secondary silencer CS/CF, insulation thickness 50 mm, length 1500 mm 5 -D K

9 Dimensions and weight -S Description Compact-height volume flow controller for constant volume flow rate control Spigot connection CAV controller variant -S, compact height Dimensions Dimensional drawing of -S L A 1⅝ 1 ØD 4⅜ 5⅛ ~ 8 1 Keep clear to provide access for operation Dimensions and weight Nominal ØD L A w size in in in in 80 3⅛ 9⅞ ⅞ 9⅞ ⅞ 9⅞ Different data for nominal size 80 P1: without groove for lip seal P1: A = 1⅛ in P1/.../D2: L = 13 in, A = 1⅝ in K

10 Dimensions and weight Description Volume flow controller for constant air volume flow control Spigot connection CAV controller variant Dimensions Dimensional drawing of L A 1 ØD 6⅞ 3½ 7⅛ 2¾ 3¼ 12 1 Keep clear to provide access for operation Dimensions and weight Nominal ØD L A w size in in in lb 80 3⅛ 12¼ ⅞ 12¼ ⅞ 12¼ ¼ 12¼ ⅞ 12¼ ¾ 15¾ ⅜ 15¾ ¾ 15¾ Different data for nominal size 80 P1: without groove for lip seal P1: L = 9⅞ in P1/.../D2: L = 13 in, A = 1⅝ in K

11 Dimensions and weight -D Description CAV controller variant -D Dimensions Volume flow controller with acoustic cladding for constant air volume flow control Spigot connection For rooms where the case-radiated noise of the unit is not sufficiently reduced by a false ceiling The circular ducts for the room under consideration must have adequate acoustic insulation (provided by others) on the fan and room ends Acoustic cladding cannot be retrofitted Dimensional drawing of -D L L₁ 1 ØD₃ ØD 3½ 6⅞ 7⅛ 2¾ 3¼ 12 1 Keep clear to provide access for operation Dimensions and weight Nominal ØD L ØD 3 L 1 W size in in in in lb 80 3 ⅛ 12 ¼ 7 ⅛ 9 ⅛ ⅞ 12 ¼ 7 ⅞ 9 ⅛ ⅞ 12 ¼ 8 ⅝ 9 ⅛ ¼ 12 ¼ 10 ⅜ 9 ⅛ ⅞ 12 ¼ 11 ¾ 9 ⅛ ¾ 15 ¾ ½ ⅜ 15 ¾ 16 ½ 12 ½ ¾ 15 ¾ 19 ⅝ 12 ½ 26.0 Different data for nominal size 80 P1: without groove for lip seal P1: L = 9 ⅞ in P1/.../D2: L = 13 in K

12 Dimensions and weight -FL Description Dimensions Volume flow controller for constant air volume flow control With flanges to make detachable connections to the ducting Dimensional drawing of -FL L ØD₂ ØD₁ 1 ØD 3½ 6⅞ n Ø ⅜ 7 ⅛ T 2¾ 3¼ 12 1 Keep clear to provide access for operation Dimensions and weight Nominal size ØD L ØD 1 ØD 2 n T W in in in in in lb ⅞ 11 ⅜ 5 ¼ 6 4 ⅛ ⅞ 11 ⅜ 6 ⅛ 7 4 ⅛ ¼ 11 ⅜ 7 ½ 8 ⅜ 6 ⅛ ⅞ 11 ⅜ 9 ⅛ 10 6 ⅛ ¾ ⅛ 11 ⅞ 6 ⅛ ⅜ ⅞ 14 ⅞ 8 ⅛ ¾ ¼ 18 ¼ 8 ⅛ 21.2 K

13 Dimensions and weight -D-FL Description Dimensions Volume flow controller with acoustic cladding for constant air volume flow control With flanges to make detachable connections to the ducting For rooms where the case-radiated noise of the unit is not sufficiently reduced by a false ceiling The circular ducts for the room under consideration must have adequate acoustic insulation (provided by others) on the fan and room ends Acoustic cladding cannot be retrofitted Dimensional drawing of -D-FL L L₁ ØD₂ ØD₁ 1 ØD₃ ØD 3½ 6 ⅞ 7 ⅛ n x ⅜ T 2 ¾ 3¼ 12 1 Keep clear to provide access for operation Dimensions and weight Nominal ØD L ØD 1 ØD 2 ØD 3 L 1 n T W size in in in in in in in lb ⅞ 14 ⅝ 5 ¼ 6 7 ⅞ 9 ⅛ 4 ⅛ ⅞ 14 ⅝ 6 ⅛ 7 8 ⅝ 9 ⅛ 4 ⅛ ¼ 14 ⅝ 7 ½ 8 ⅜ 10 ⅜ 9 ⅛ 6 ⅛ ⅞ 14 ⅝ 9 ⅛ ¾ 9 ⅛ 6 ⅛ ¾ 18 ⅛ 11 ⅛ 11 ⅞ ½ 6 ⅛ ⅜ 18 ⅛ 13 ⅞ 14 ⅞ 16 ½ 12 ½ 8 ⅛ ¾ 18 ⅛ 17 ¼ 18 ¼ 19 ⅝ 12 ½ 8 ⅛ 34.6 K

14 Specification text Standard text This specification text describes the general properties of the product. Texts for individual variants can be generated with our Easy Product Finder design program. Circular volume flow controllers for constant air volume systems, mechanical self-powered, without external power supply, suitable for supply or extract air, available in 8 nominal sizes. Ready-to-commission unit consists of the casing containing a damper blade with low-friction bearings, bellows, external cam plate and leaf spring. Volume flow controllers without actuators are factory set to a reference volume flow rate (customers can set the required volume flow rate on site). Spigot connection with groove for lip seal, suitable for connecting ducts to EN 1506 or EN Casing air leakage to EN 1751, class C. Special features Volume flow rate can be set using an external scale; no tools required High volume flow rate control accuracy Any installation orientation Materials and surfaces Casing and damper blade made of galvanized sheet steel Leaf spring made of stainless steel Polyurethane bellows Plain bearings with PTFE coating -D Acoustic cladding made of galvanized sheet steel Rubber profile for the insulation of structure- borne noise Lining is made of mineral wool Mineral wool To EN 13501, fire rating class A2, non- combustible RAL quality mark RAL-GZ 388 Biosoluble and hence hygienically safe according to the German TRGS 905 (Technical Rules for Hazardous Substances) and EU directive 97/69/EG Construction Galvanized sheet steel P1: Powder-coated, silver grey (RAL 7001) A2: Stainless steel Technical data Nominal sizes: 3 16 in Volume flow rate range: CFM Volume flow rate control range: approx % of the nominal volume flow rate Differential pressure: in w.g. Sizing data CFM Δp st in w.g. L P NC Air-regenerated noise NC L P NC Case-radiated noise NC Order options Type -S Volume flow controller Size 80 3"* 100 4" 125 5" Material No entry: galvanized sheet steel P1 Powder-coated, silver grey (RAL 7001) A2 Stainless steel Accessories D2 Nominal Diameter *Nominal size 3" requires transition piece for US ductwork Lip seals on both ends K

15 Order options Order options Type Volume flow controller Acoustic cladding D With acoustic cladding Material No entry: galvanized sheet steel P1 Powder-coated, silver grey (RAL 7001) A2 Stainless steel Flange FL Flanges on both ends Size 80 3" ** 100 4" 125 5" 160 6" ** 200 8" " " ** " Nominal Diameter **Nominal size 3", 6" and 12" require transition piece for US ductwork Accessories D2 Lip seals on both ends G2 Matching flanges for both ends Actuator B50 Min/Max switching, 24 V AC/DC supply voltage B52 Min/Max switching, 24 V AC/DC supply voltage, with auxiliary switch B60 Min/Max switching, 230 V AC supply voltage B62 Min/Max switching, 230 V AC supply voltage, with auxiliary switch B70 Variable adjustment, 24 V AC/DC supply voltage B72 Variable adjustment, 24 V AC/DC supply voltage, with auxiliary switch Volume flow rates [CFM] only actuators min max for factory setting K

16 Notes K