00137512_0
CAV controller variant RN


00132715_0
Tested to VDI 6022


00132811_0
Actuator for switching between setpoint values


00137512_0
00132715_0
00132811_0

RN   

For the precise control of constant volume flow rates

Circular self-powered volume flow controllers for the control of supply air or extract 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 12 m/s
  • Any installation orientation; maintenance-free
  • Casing air leakage to EN 1751, class C


Optional equipment and accessories

  • Acoustic cladding for the reduction of case-radiated noise
  • Secondary silencer Type CA or CS for the reduction of air-regenerated noise
  • Hot water heat exchanger Type WL and electric air heater Type EL for reheating the airflow
  • Actuator for switching between setpoint values

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    Application

    Application

    • Circular CONSTANTFLOW CAV controllers of Type RN 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 qvmin and qvmax using optional actuator

    Special features

    • Volume flow rate can be set using an external scale; no tools required
    • High volume flow rate control accuracy
    • Any installation orientation

    Nominal sizes

    • RN-S: 80, 100, 125
    • RN: 80, 100, 125, 160, 200, 250, 315, 400
    • RN-FL: 100, 125, 160, 200, 250, 315, 400

    Description

    Variants

    • RN-S: Compact-height volume flow controller
    • RN: Volume flow controller
    • RN-D: Volume flow controller with acoustic cladding
    • RN-FL: Volume flow controller with flanges on both ends
    • RN-D-FL: Volume flow controller with acoustic cladding and flanges on both ends
    • Units with acoustic cladding and/or a secondary silencer Type CA or CS for demanding acoustic requirements
    • Acoustic cladding cannot be retrofitted

    Construction

    • Galvanised sheet steel
    • P1: Powder-coated, silver grey (RAL 7001)
    • A2: Stainless steel

    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)

    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
    • Variant RN-S cannot be combined with an actuator

    Accessories

    • Lip seals on both ends (factory fitted)
    • Matching flanges for both ends

    Useful additions

    • Secondary silencer Type CA or CS
    • Heat exchanger Type WL
    • Electric air heater Type EL

    Construction features

    • Circular casing
    • Spigot suitable for circular ducts to EN 1506 or EN 13180
    • Spigot with groove for lip seal (RN-P1/80 and RN-A2/80 are not available with groove and lip seal)
    • RN-FL: Circular flanges to EN 12220

    Materials and surfaces

    Galvanised sheet steel construction

    • Casing made of galvanised sheet steel
    • Interior parts, nominal sizes 80 – 125: stainless steel 1.4301, nominal sizes 160 – 400: galvanised sheet steel
    • Polyurethane bellows
    • Plain bearings with PTFE coating
    • Leaf spring made of stainless steel


    Powder-coated construction (P1)

    • Casing made of galvanised sheet steel, powder-coated
    • Interior parts, nominal sizes 80 – 125: stainless steel 1.4301, nominal sizes 160 – 400: galvanised sheet steel, powder-coated


    Stainless steel construction (A2)

    • Casing made of stainless steel 1.4301
    • Interior parts made of stainless steel


    Variant with acoustic cladding (-D)

    • Acoustic cladding made of galvanised sheet steel
    • Rubber seal profile for the insulation of structure-borne noise
    • Lining is mineral wool


    Mineral wool

    • To EN 13501, fire rating class A1, 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/EC

    Standards and guidelines

    • Meets the hygiene requirements of VDI 6022
    • Casing air leakage to EN 1751, class C

    Maintenance

    • Maintenance-free as construction and materials are not subject to wear

    Technical information

    Function, TECHNICAL DATA, QUICK SIZING, SPECIFICATION TEXT, ORDER CODE, Produktbeziehungen

    • Function
    • TECHNICAL DATA
    • QUICK SIZING
    • SPECIFICATION TEXT
    • ORDER CODE
    Schematic illustration of the RN 00131246_0
    ① 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


    Functional description

    The volume flow controller is a mechanical self-powered 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.

    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 control units. The measurement points for fan speed control must be selected accordingly.

    Nominal sizes

    80 – 400 mm

    Volume flow rate range

    11 – 1400 l/s or 40 – 5040 m³/h

    Volume flow rate control range

    Approx. 25 to 100 % of the nominal volume flow rate

    Scale accuracy

    ± 4 %

    Minimum differential pressure

    50 Pa (nominal size 80: 100 Pa)

    Maximum differential pressure

    1000 Pa

    Operating temperature

    10 – 50 °C




    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 programme.

    The first selection criteria for the nominal size are the actual volume flow rates qvmin and qvmax. The quick sizing tables are based on generally accepted attenuation levels. If the sound pressure level exceeds the required level, a larger air terminal unit and/or a silencer is required.

    Sizing example

    Given data

    Vmax = 280 l/s (1010 m3/h)

    Δpst = 150 Pa

    Required sound pressure level in the room 35 dB(A)

    Quick sizing

    RN/200 with circular silencer CF 050/200×1000

    Air-regenerated noise LPA = 26 dB(A)

    Case-radiated noise LPA = 31 dB(A)

    RN, Sound pressure level at differential pressure 150 Pa

    Nominal size V Air-regenerated noise Case-radiated noise
    Nominal size V ① ② ③ ④ ① ⑤
    Nominal size V LPA LPA1 LPA2 LPA3
    Nominal size l/s m³/h dB(A)

    80

    11

    40

    37

    24

    17

    15

    22

    <15

    80

    20

    72

    39

    27

    19

    17

    24

    <15

    80

    40

    144

    47

    34

    24

    22

    31

    <15

    80

    45

    162

    48

    35

    25

    24

    32

    <15

    100

    22

    79

    37

    24

    17

    15

    22

    <15

    100

    40

    144

    40

    29

    22

    20

    21

    <15

    100

    70

    252

    47

    35

    27

    26

    29

    <15

    100

    90

    324

    50

    38

    30

    29

    33

    <15

    125

    35

    126

    37

    27

    21

    18

    15

    <15

    125

    60

    216

    43

    34

    27

    25

    19

    <15

    125

    115

    414

    50

    41

    35

    33

    27

    <15

    125

    140

    504

    52

    44

    39

    37

    30

    <15

    160

    60

    216

    40

    32

    26

    24

    29

    <15

    160

    105

    378

    45

    37

    32

    29

    33

    <15

    160

    190

    684

    49

    41

    35

    33

    39

    <15

    160

    240

    864

    50

    41

    36

    34

    41

    16

    200

    90

    324

    40

    31

    24

    22

    28

    <15

    200

    160

    576

    43

    35

    28

    26

    32

    <15

    200

    300

    1080

    48

    40

    33

    32

    40

    17

    200

    360

    1296

    49

    41

    35

    33

    42

    20

    250

    145

    522

    41

    32

    24

    22

    29

    15

    250

    255

    918

    42

    34

    28

    26

    33

    <15

    250

    470

    1692

    46

    39

    33

    31

    40

    19

    250

    580

    2088

    48

    41

    35

    34

    43

    22

    315

    230

    828

    39

    33

    26

    23

    30

    <15

    315

    400

    1440

    42

    35

    29

    27

    35

    <15

    315

    750

    2700

    44

    38

    32

    31

    40

    19

    315

    920

    3312

    46

    41

    35

    34

    43

    23

    400

    350

    1260

    46

    39

    33

    29

    45

    <15

    400

    610

    2196

    48

    42

    36

    32

    49

    18

    400

    1130

    4068

    50

    44

    38

    35

    54

    24

    400

    1400

    5040

    51

    45

    40

    37

    56

    27

    ① RN without silencer

    ② RN with circular silencer CF, insulation thickness 50 mm, length 500 mm

    ③ RN with circular silencer CF, insulation thickness 50 mm, length 1000 mm

    ④ RN with circular silencer CF, insulation thickness 50 mm, length 1500 mm

    ⑤ RN-D (with acoustic cladding)


    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 with groove for lip seal, suitable for connecting ducts according to EN 1506 or EN 13180.

    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

    Galvanised sheet steel construction

    • Casing made of galvanised sheet steel
    • Interior parts, nominal sizes 80 – 125: stainless steel 1.4301, nominal sizes 160 – 400: galvanised sheet steel
    • Polyurethane bellows
    • Plain bearings with PTFE coating
    • Leaf spring made of stainless steel


    Powder-coated construction (P1)

    • Casing made of galvanised sheet steel, powder-coated
    • Interior parts, nominal sizes 80 – 125: stainless steel 1.4301, nominal sizes 160 – 400: galvanised sheet steel, powder-coated


    Stainless steel construction (A2)

    • Casing made of stainless steel 1.4301
    • Interior parts made of stainless steel


    Variant with acoustic cladding (-D)

    • Acoustic cladding made of galvanised sheet steel
    • Rubber seal profile for the insulation of structure-borne noise
    • Lining is mineral wool


    Mineral wool

    • To EN 13501, fire rating class A1, 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/EC

    Construction

    • Galvanised sheet steel
    • P1: Powder-coated, silver grey (RAL 7001)
    • A2: Stainless steel

    Technical data

    • Nominal sizes: 80 to 400 mm
    • Volume flow rate range: 11 to 1400 l/s or 40 to 5040 m³/h
    • Volume flow rate control range: approx. 25 – 100 % of the nominal volume flow rate
    • Minimum differential pressure: 50 Pa (nominal size 80: 100 Pa)
    • Maximum differential pressure: 1000 Pa

    Sizing data

    • qv [m³/h]
    • Δpst [Pa]

    Air-regenerated noise

    • LPA [dB(A)]

    Case-radiated noise

    • LPA  [dB(A)]

    This specification text describes the general properties of the product. Texts for variants can be generated with our Easy Product Finder design programme.

    Life cycle assessment
    A life cycle assessment is available for the product series in form of an Environmental Product Declaration (EPD) that has been checked and published by a programme holder.

    00134834_0

     Type
    RN       Volume flow controller

     Acoustic cladding
           No entry: none
    D       With acoustic cladding

     Material
           No entry: galvanised sheet steel
    P1       Powder-coated (RAL 7001), silver grey
    A2       Stainless steel

     Flange
           No entry: none
    FL       Flanges on both ends

    		 

     Nominal size [mm]
    80
    100
    125
    160
    200
    250
    315
    400

     Accessories
           No entry: none
    D2       Lip seals on both ends
    G2       Matching flanges for both ends

     Actuator
           No entry: without
           For example
    B50       24 V AC/DC, 3-point
    B52       24 V AC/DC, 3-point, with auxiliary switch
    B70       24 V AC/DC, modulating 2 – 10 V DC

     Volume flow rates [m3/h or l/s]
           only actuators
           Vmin – max for factory setting

    00134834_0
    00136758_0

    Notes on the order code

    RN-S

    • RN-S-A2/80: no lip seal (D2)


    RN

    • RN/80: no flange (FL), no matching flange (G2)
    • RN-A2/80: no lip seal (D2)

    Order example: RN/160/D2

    Nominal size

    160

    Material

    Galvanised sheet steel

    Accessories

    Lip seal on both ends


    Order example: RN-D-FL/250/G2/B50

    Acoustic cladding

    With

    Flange

    Both ends

    Material

    Galvanised sheet steel

    Nominal size

    250

    Accessories

    Matching flanges for both ends

    Actuator

    B50


     

    Variants, Attachments, Dimensions and weight

    • Variants
    • ATTACHMENTS
    • DIMENSIONS AND WEIGHT
    CAV controller variant RN-S, compact height
    00132149_0


    00132149_0
    00137512_0
    00132146_0
    00132158_0

    RN-S

    • Compact-height volume flow controller for constant volume flow rate control
    • Spigot to make connections to the ducting

    RN

    • Volume flow controller for constant air volume flow control
    • Spigot to make connections to the ducting

    RN-D

    • Volume flow controller with acoustic cladding for constant air volume flow control
    • Spigot to make 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

    RN-FL

    • Volume flow controller for constant air volume flow control
    • With flanges to make detachable connections to the ductwork

    RN-D-FL

    • Volume flow controller with acoustic cladding for constant air volume flow control
    • With flanges to make detachable connections to the ductwork
    • 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
    • Powder-coated surface (P1) or stainless steel construction (A2) not possible

    Materials

    Order code detail Part Material Notes

    –

    Casing

    Galvanised sheet steel

    –

    Damper blade

    Stainless steel, material no. 1.4301

    Nominal size 80

    –

    Damper blade

    Stainless steel, material no. 1.4310

    Nominal sizes: 100, 125

    –

    Damper blade

    Galvanised sheet steel

    Nominal sizes from 160

    –

    Shaft

    Stainless steel, material no. 1.4301

    Nominal sizes 80 to 200

    –

    Shaft

    Stainless steel, material no. 1.4104

    Nominal sizes 250 to 400

    –

    Plain bearings

    Steel with PTFE coating

    D

    Acoustic cladding

    Galvanised sheet steel

    D

    Rubber profile for the insulation of structure-borne noise

    Rubber

    D

    Lining

    Mineral wool

    P1

    Casing

    Galvanised sheet steel

    Powder-coated

    P1

    Damper blade

    Stainless steel, material no. 1.4301

    Nominal size 80

    P1

    Damper blade

    Stainless steel, material no. 1.4310

    Nominal sizes: 100, 125

    P1

    Damper blade

    Galvanised sheet steel

    Powder-coated, nominal sizes from 160

    P1

    Shaft

    Stainless steel, material no. 1.4301

    Nominal sizes 80 to 200

    P1

    Shaft

    Stainless steel, material no. 1.4305

    Nominal sizes 250 to 400

    P1

    Plain bearings

    Bronze with PTFE coating

    A2

    Casing

    Stainless steel, material no. 1.4301

    A2

    Damper blade

    Stainless steel, material no. 1.4301

    Nominal size 80

    A2

    Damper blade

    Stainless steel, material no. 1.4310

    Nominal sizes: 100, 125

    A2

    Damper blade

    Stainless steel, material no. 1.4301

    Nominal sizes from 160

    A2

    Shaft

    Stainless steel, material no. 1.4301

    Nominal sizes 80 to 200

    A2

    Shaft

    Stainless steel, material no. 1.4305

    Nominal sizes 250 to 400

    A2

    Plain bearings

    Bronze with PTFE coating

    Surfaces

    Order code detail Part Surface

    –

    Casing

    Galvanised steel

    P1

    Casing

    Powder-coated, RAL 7001, silver grey

    A2CasingStainless steel construction

    RN, actuators

    Order code detail Actuator Supply voltage Auxiliary switch

    Min/Max actuators




    B50

    Actuator with mechanical stops TROX/Belimo

    24 V AC/DC

    –

    B52

    Actuator with mechanical stops TROX/Belimo

    24 V AC/DC

    2

    B60

    Actuator with mechanical stops TROX/Belimo

    230 V AC

    –

    B62

    Actuator with mechanical stops TROX/Belimo

    230 V AC

    2

    Modulating actuators




    B70

    Actuator with mechanical stops TROX/Belimo

    24 V AC/DC

    –

    B72

    Actuator with mechanical stops TROX/Belimo

    24 V AC/DC

    2


    Anbauteile: VARYCONTROL Regelkomponenten

    ☒ Regel- größe Schnittstelle Vmin -/ Vmax - Verstellung Differenzdruck- transmitter Stellantrieb Fabrikat LVC TVR TVJ TVT TZ-S TA-S TVZ TVA TVM TVRK TVLK





















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    BC0

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    BL0

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    Integriert

    Integriert

    ②

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    BM0

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    Integriert

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    V

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    B27

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    ●

    ●

    ●

    ●

    ●

    ●

    ●

    BR1

    Δp

    MP-Bus

    100 Pa

    Stellantrieb, Drehmoment für TVT

    ②



    ●






    BR3

    Δp

    MP-Bus

    100 Pa

    Stellantrieb

    ②

    ●

    ●

    ●

    ●

    ●

    ●

    ●

    BRB

    Δp

    MP-Bus

    100 Pa

    Federrücklaufantrieb

    ②

    ●

    ●

    ●

    ●

    ●

    ●

    ●

    ●

    BRG

    Δp

    MP-Bus

    100 Pa

    Schnelllaufender Stellantrieb

    ②

    ●

    ●

    ●

    ●

    ●

    ●

    BS1

    Δp

    MP-Bus

    600 Pa

    Stellantrieb, Drehmoment für TVT

    ②



    ●






    BS3

    Δp

    MP-Bus

    600 Pa

    Stellantrieb

    ②

    ●

    ●



    ●

    ●

    BSB

    Δp

    MP-Bus

    600 Pa

    Federrücklaufantrieb

    ②

    ●

    ●

    ●




    ●

    BSG

    Δp

    MP-Bus

    600 Pa

    Schnelllaufender Stellantrieb

    ②

    ●

    ●

    ●




    ●

    BG1

    Δp

    100 Pa

    Stellantrieb, Drehmoment für TVT

    ②



    ●






    BG3

    Δp

    100 Pa

    Stellantrieb

    ②

    ●

    ●

    ●

    ●

    ●

    ●

    ●

    BGB

    Δp

    100 Pa

    Federrücklaufantrieb

    ②

    ●

    ●

    ●

    ●

    ●

    ●

    ●

    ●

    BH1

    Δp

    600 Pa

    Stellantrieb, Drehmoment für TVT

    ②



    ●






    BH3

    Δp

    600 Pa

    Stellantrieb

    ②

    ●

    ●





    ●

    BHB

    Δp

    600 Pa

    Federrücklaufantrieb

    ②

    ●

    ●

    ●




    ●

    XE1

    Δp

    Integriert, 100 Pa

    Stellantrieb

    ③

    ●

    ●

    ●

    ●

    ●

    ●

    ●

    ●

    XE3

    Δp

    Integriert, 100 Pa

    Federrücklaufantrieb

    ③

    ●

    ●

    ●

    ●

    ●

    ●

    ●

    ●

    XF1

    Δp

    Integriert, 600 Pa

    Stellantrieb

    ③

    ●

    ●

    ●




    ●

    XF3

    Δp

    Integriert, 600 Pa

    Federrücklaufantrieb

    ③

    ●

    ●

    ●




    ●

    ① TROX, ② TROX/Belimo, ③ TROX/Gruner, ④ Sauter, ⑤ Siemens

    ☒ Bestellschlüsseldetail, V Volumenstrom, Δp Differenzdruck


    Anbauteile: VARYCONTROL Regelkomponenten

    ☒ Regel- größe Schnittstelle Vmin -/ Vmax - Verstellung Differenzdruck- transmitter Stellantrieb Fabrikat


    Easylabregler

    Statisch

    Elab

    RS, RE, PC, C

    TCU3

    Integriert

    Schnelllaufender Stellantrieb

    Elab

    RS, PC, C

    TCU3

    Integriert

    Schnelllaufender Stellantrieb

    Elab

    RE, PC, C

    TCU3

    Integriert

    Schnelllaufender Stellantrieb

    Elab

    RS, RE, PC, FH, C

    TCU3

    Integriert

    Schnelllaufender Stellantrieb


    Elektronischer Regler

    Statisch

    Elektronischer Regler

    TMA

    RS, RE, PC

    TCU-LON-II mit LonWorks-Schnittstelle

    Integriert

    Schnelllaufender Stellantrieb

    TMB

    RS, RE, PC

    TCU-LON-II mit LonWorks-Schnittstelle

    Integriert

    Schnelllaufender Stellantrieb (bürstenloser Motor)

    TMA

    RS, RE,

    TCU-LON-II mit LonWorks-Schnittstelle

    Integriert

    Schnelllaufender Stellantrieb

    TMB

    RS, RE,

    TCU-LON-II mit LonWorks-Schnittstelle

    Integriert

    Schnelllaufender Stellantrieb (bürstenloser Motor)

    TMA

    RE ,PC

    TCU-LON-II mit LonWorks-Schnittstelle

    Integriert

    Schnelllaufender Stellantrieb

    TMB

    RE ,PC

    TCU-LON-II mit LonWorks-Schnittstelle

    Integriert

    Schnelllaufender Stellantrieb (bürstenloser Motor)

    TMA

    RS, RE ,PC, FH

    TCU-LON-II mit LonWorks-Schnittstelle

    Integriert

    Schnelllaufender Stellantrieb

    TMB

    RS, RE ,PC, FH

    TCU-LON-II mit LonWorks-Schnittstelle

    Integriert

    Schnelllaufender Stellantrieb (bürstenloser Motor)
























































    XF3

    Δp

    Integriert, 600 Pa

    Federrücklaufantrieb

    ③

    BB3

    V

    Separates Bauteil

    Stellantrieb

    ②

    ① TROX, ② TROX/Belimo, ③ TROX/Gruner, ④ Sauter, ⑤ Siemens

    ☒ Bestellschlüsseldetail, V Volumenstrom, Δp Differenzdruck


    RN-S, nominal size 100, 125
    00182664_0


    00182664_0
    00182671_0
    00182678_0
    00182685_0
    00103435_0







    Installation details, Basic information and nomenclature

    • Installation details
    • BASIC INFORMATION AND NOMENCLATURE
    Bend
    00137278_0

    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.


    00137278_0
    00136019_0
    00187606_0

    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
    • RN-D: For constructions with acoustic cladding, ducts on the room side should have cladding up to the acoustic cladding of the controller

    Upstream conditions

    The volume flow rate accuracy ΔV applies to a straight upstream section of the duct. Bends, junctions or a narrowing or widening of the duct cause turbulence that may affect measurement. Duct connections, e.g. branches off the main duct, must comply with EN 1505. Some installation situations require straight duct sections upstream.

    Free air intake only with a straight duct section of 1D upstream.

    Space required for commissioning and maintenance

    Sufficient space must be kept clear near any attachments to allow for commissioning and maintenance. It may be necessary to provide sufficiently sized inspection access openings.

    Space required

    Attachments ① ② ③
    Attachments mm

    Without actuator

    200

    200

    200

    With actuator

    200

    320

    300


    Definition of noise
    00136089_0
    ① Air-regenerated noise
    ② Case-radiated noise


    00136089_0
    00136092_0

    Prinipal dimensions

    ØD [mm]

    Outside diameter of the spigot

    ØD₁ [mm]

    Pitch circle diameter of flanges

    ØD₂ [mm]

    Outside diameter of flanges

    ØD₄ [mm]

    Inside diameter of the screw holes of flanges

    L [mm]

    Length of unit including connecting spigot

    L₁ [mm]

    Length of casing or acoustic cladding

    H₁ [mm]

    Screw hole pitch of flange (vertical)

    n [ ]

    Number of flange screw holes

    T [mm]

    Flange thickness

    m [kg]

    Unit weight including the minimum required attachments for manual adjustment

    fm [Hz]

    Octave band centre frequency

    LPA [dB(A)]

    A-weighted sound pressure level of air-regenerated noise of the CAV controller, system attenuation taken into account

    LPA1 [dB(A)]

    A-weighted sound pressure level of air-regenerated noise of the CAV controller with secondary silencer, system attenuation taken into account

    LPA2 [dB(A)]

    A-weighted sound pressure level of case-regenerated noise of the VAV terminal unit, system attenuation taken into account

    qvnom [m³/h] and [l/s]

    Nominal volume flow rate (100 %)

    • The value depends on product type and nominal size
    • Values are published on the internet and in technical leaflets, and stored in the Easy Product Finder design software.
    • Upper limit of the setting range and maximum volume flow rate setpoint value for the CAV controller

    qv [m³/h] and [l/s]

    Volume flow rate

    ΔV [± %]

    Volume flow rate accuracy in relation to the setpoint (tolerance)

    Δpst [Pa]

    Static differential pressure

    Δpst min [Pa]

    Static differential pressure, minimum

    • The static minimum differential pressure is equal to the pressure loss of the CAV controller when the damper blade is open, caused by flow resistance (bellows, crossbar)
    • If the pressure on the CAV controller is too low, the setpoint volume flow rate may not be achieved, not even when the damper blade is open
    • 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 controllers, and the measurement point or points for speed control must have been selected accordingly to achieve this

    Galvanised sheet steel

    • Casing made of galvanised sheet steel
    • Parts in contact with the airflow as described for the product type
    • External parts, e.g. mounting brackets or covers, are usually made of galvanised sheet steel

    Powder-coated surface (P1)

    • Casing made of galvanised sheet steel, powder-coated RAL 7001, silver grey
    • Parts in contact with the airflow are powder-coated or made of plastic
    • Due to production, some parts that come into contact with the airflow may be stainless steel or aluminium, powder-coated
    • External parts, e.g. mounting brackets or covers, are usually made of galvanised sheet steel

    Stainless steel (A2)

    • Casing made of stainless steel 1.4201
    • Parts in contact with the airflow are powder-coated or made of stainless steel
    • External parts, e.g. mounting brackets or covers, are usually made of galvanised sheet steel

    Retrofitting of an actuator (B50 / B60 / B70) on the CAV controllers Type RN

    Downloads

    product information

    • Product Data Sheet RN

      RN_PD_2022_12_13_DE_en Product Data Sheet 780 KB pdf

    certificates

    • Declaration of conformity or declaration of incorporation Type RN

      Declaration of conformity or declaration of incorporation 75 KB pdf

    • Declaration of conformity or declaration of incorporation Type RN

      Declaration of conformity or declaration of incorporation 93 KB pdf

    • Declaration of hygiene conformity Type RN/RNS

      RN-RNS_HC_2020_06_08_DE_en Hygiene certificate 2,2 MB pdf

    • Environmental Product Declaration RN

      RN _EPD_2024_03_DE_en Environmental Product Declarations 530 KB pdf

    • Environmental Product Declaration RN-D

      RN-D_EPD_2024_03_DE_en Environmental Product Declarations 520 KB pdf

    • Environmental Product Declaration RN-S

      RN-S_EPD_2024_03_DE_en Environmental Product Declarations 510 KB pdf

    operation manuals

    • Operating manual Type RN

      RN_IM_A00000077958_V1_2019_11_GB_en Operating manual 2 MB pdf

    • Setpoint adjustment aid Type RN

      RN-Regler_Einstellskalen Setpoint adjustment aid 18 MB pdf

    TROX Services

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