Stulz BNB 1000 Technical Manual
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Stulz BNB 1000 Technical Manual

Ultrasonic air conditioning
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Issue 10.94e
AIR CONDITIONING
ULTRASONIC/BNB
TECHNICAL MANUAL
We reserve the right to make technical changes

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Summary of Contents for Stulz BNB 1000

  • Page 1 Issue 10.94e AIR CONDITIONING ULTRASONIC/BNB TECHNICAL MANUAL We reserve the right to make technical changes...

  • Page 2: Table Of Contents

    List of contents Application areas and method of operation ............3 Technical data for the BNB model range..............5 2.1 Humidifier section ................... 6 2.2 Dimensional drawing ..................7 2.3 Description of unit ................... 8 Capacity calculation for ultrasonic air humidifiers ..........10 3.1 Questionnaire about ultrasonic humidifying systems........

  • Page 3: Application Areas And Method Of Operation

    1. Application areas, method of operation BNB Model range Units of the ultrasonic BNB 1000 to BNB 8000 model range are available for direct room humidifying. The key components of this unit consist of high-quality steel or high-quality plastic. A fan is integrated into chassis which carries the mist generated in the water bath out into the room.
  • Page 4 Method of operation The STULZ ULTRASONIC model range of air humidifiers work in accordance with the principle of ultrasonic atomization. A 48 V alternating voltage is rectified on a printed circuit board and converted into a high frequency signal of 1.65 MHz. This signal is transmitted to a transducer installed in a water bath which converts this signal into a high- frequency mechanical vibration.

  • Page 5: Technical Data For The Bnb Model Range

    2. Technical information on the BNB model range The BNB ULTRASONIC humidifier works in accordance with the principle of ultrasonic atomization. The mist, which is produced in a water tank with the aid of a transducer, is blown into the room by a built-in fan. The humidifier consists of the atomization modules, the supply module with a solenoid valve, via which the water supply runs, as well as float switch and a housing in which a fan is accommodated.

  • Page 6: Humidifier Section

    2.1 Humidifier section The length of the humidifier section depends on various factors. > even distribution of the mist in the air flow > temperature of the air > rel. humidity of the air > air speed The diagram below for determining the length humidifier section contains recommended values depending on the most important parameters.

  • Page 7: Dimensional Drawing

    2.2 Dimensional drawings For dimensions A and P see Page 6 under “Dimensions” Legend: Humidifier unit Safety overflow Fan housing Mist guide pipe Mist guide cover Ring and nut Installation foot Metal plug Air filter Cable Water supply* Metal plug Shut-off valve* Cable Air flap controller...

  • Page 8: Description Of Unit

    2.3 Description of unit Safety precautions Automatic supply water monitoring by solenoid valve and float switch. Protective device against running dry; if the water drops below a preset level, the float switch and relay are automatically operated to switch off the power supply. A thermostat switches off the current, if the temperature in the air humidifier rises above a preset point.
  • Page 9 4. Relay (external, in control box) and float switch (dry protection) The transducer will be damaged if the humidifier is operated with a reduced water level. A float switch and a relay (in the control station) are interposed to prevent such an operating condition.

  • Page 10: Capacity Calculation For Ultrasonic Air Humidifiers

    3. Capacity calculation for ultrasonic air humidifiers Example: Humidification of a room with gap ventilation. The following data is required to determine the humidifier output for rooms without a ventilation system: Example: > Size of room (m) 500 m > Temperature, humidity in room 22°C /50% rel.
  • Page 11 Note: STULZ ULTRASONIC humidifiers atomize the water into the smallest water droplets (< 0.001 mm). The mist thus generated (aerosols) extracts the heat out of the ambient air (enthalpy) and changes its state from liquid to gaseous. The ambient air is cooled down by this “adiabatic” behaviour (heat extraction from the ambient air).

  • Page 12: Questionnaire About Ultrasonic Humidifying Systems

    3.1 Questionnaire about ultrasonic humidification systems Please use the following questionnaire for planning a STULZ ultrasonic humidifier system. Q U E S T I O N N A I R E about ultrasonic humidification systems Room temperature specified value _____ °C Room humidity specified value _____ % R.H.
  • Page 13 Q U E S T I O N N A I R E about ultrasonic humidification systems Room temperature specified value _____ °C Room humidity specified value _____ % R.H. Room volume _____ m Height _________m Width_________m Length _________m Ventilation system Quantity of air _______________m Is the supply air humidified...

  • Page 14: Switching Operation And Control

    Defective wiring of the switchgear cabinet may lead to a defect in the humidifier, therefore the switchgear cabinets are to be wired in accordance with the wiring diagrams made available. The parts supplied by STULZ are identified with * in the wiring diagram.

  • Page 15: Design Of Two-Point (On-Off) Control

    4.1 Design of the two-point (ON-OFF) control The most simple type of control is via a hygrostat which compares the room humidity value (actual value) with the set value (specified value). If the actual value is below the specified value, the hygrostat switches on the humidifier, if the value is above this, the unit is switched off.
  • Page 16 BNB 1000 ON/OFF CONTROL...
  • Page 17 BNB 2000 - 3000 ON/OFF CONTROL...
  • Page 18 BNB 4000 ON/OFF CONTROL...
  • Page 19 BNB 5000 ON/OFF CONTROL...
  • Page 20 BNB 8000 ON/OFF CONTROL...

  • Page 21: Design Of Proportional Control

    With proportional control, the actual value is compared with the specified value and the humidifier output adjusted corresponding to the resultant control difference. The propor- tional control consists of a humidity sensor, the continuous-action controller as well as the STULZ proportional adapter, which represents the interface between the humidifier and control components.
  • Page 22 BNB 1000 PROPORTIONAL CONTROL...
  • Page 23 BNB 2000 - 3000 PROPORTIONAL CONTROL...
  • Page 24 BNB 4000 PROPORTIONAL CONTROL...
  • Page 25 BNB 5000 PROPORTIONAL CONTROL...
  • Page 26 BNB 8000 PROPORTIONAL CONTROL...

  • Page 27: Method Of Operation Of Proportional Adapter

    4.3 Method of operation of the proportional adapter 1. General The M 02719 (P adapter) proportional adapter is an output unit which varies its ON-time proportionally depending on four different controller inputs. 2. Function After the threshold value of 1.2 VDC (or 1.2 mADC) is exceeded, the relay switches on the water supply valve at terminals 13 and 14 (see electrical diagram, proportional adapter M02719).
  • Page 28 Connection assignment +0... 10 V DC Polarity reversal protected controller input Terminal 1 = 20 kOhm Terminal 2 +0...20 V DC Polarity reversal protected controller input Terminal 3 = 40 kOhm Terminal 4 +0...20 mA DC Polarity reversal protected controller input Terminal 5 = 1 kOhm Terminal 6...

  • Page 29: Connecting Pipes Between The Humidifiers And The Switching Operation And Control

    Recommendations for cable dimensioning (see 3.) should be taken into account for an extension of the connecting cables. 2. Preassembled cable VIEW FROM SOLDER SIDE VIEW - SOLDER SIDE EMPTY EMPTY 4-PIN PLUG 6-PIN PLUG BNB 5000/8000 VIEW - SOLDER SIDE 2-PIN PLUG BNB 1000 to 4000...
  • Page 30 52 VAC. Type Voltage Current Max. cable Max. cable length 1.5 mm length 2.5 mm BNB 1000 48 VAC 2.08 39 m 65 m BNB 2000 48 VAC 3.75...

  • Page 31: Electrotechnical Information On Bnb

    4.5 Electrotechnical information on BNB Internal wiring BNB 1000, 4000 Legend: V2-4 Varistor Relay plate Auxiliary relay Solenoid valve Float switch for water supply Float switch for low water level Thermostat NB1..n Ultrasonic atomization module...
  • Page 32 BNB 5000, 8000 Legend: V2-4 Varistor Float switch for water supply Relay plate Float switch for low water level Auxiliary relay Thermostat Solenoid valve NB1..n Ultrasonic atomization module...

  • Page 33: Installation, Commissioning And Application Limits

    5. Assembly, commissioning and application limits When planning and assembling the ultrasonic humidifiers, it is imperative that all materials which come into contact with the deionized water are resistant to deionized water. The most important materials can be obtained from the following table. Materials for deionized water Material Maximum temperature...

  • Page 34: Installation Of Bnb Model Range

    5.1 Installation of BNB model range 1) The unit must be mounted or installed so that the mist blown out by the fan is distributed evenly in the entire room. 2) The following notes are particularly to be complied when installing/assembling: a) The unit must be installed in a totally horizontal position.
  • Page 35 Legend for installation diagram 1. Control station 2. Provided by customer 3. Connection 3/4" external thread (flat-sealing) Provide for continuous pipe interruptor 4. Hand-operated valve 5. High-quality steel pipe, 6 mm dia. (1.4571) 6. Ultrasonic humidification 7. Measuring electrode 8. Water treatment system (ion exchanger/reverse osmosis system) 9.
  • Page 36 Connections on the water side to the BNB humidifiers. The position of the connections and further unit dimensions can be found under Item 2.2. Water supply line Inlet screwed connection in humidifier (scope of supply) Union nut (L50010) including olive (scope of supply) Clean water pipe, 6 dia.
  • Page 37 Drain O-ring and plug i n scope of supply Connection of a drain line with solenoid valve is only necessary if for particular hygiene regulations, draining of the water is required in the event of a longer OFF-time of the humidifier.
  • Page 38 150 l/hour of water at 2 6 dia. incl. Teflon ring for bar water pressure and a length of PE pipe M10422 10 m. In this example, part numbers are shown for screwed connections and Humidifier pipes/hoses which can be ordered from the STULZ warehouse.
  • Page 39 Examples for the installation of BNB humidifiers Water demineralizer unit with 2N ion exchangers in series...
  • Page 40 Wiring 1) The operating voltage is 220 V, 50 Hz (control cabinet) 2) The power supply line is to be connected to the terminal block of the control station, i.e. L1 - N - PE. 3) There is a connection and wiring between the transformer and humidifying unit, conductivity measuring instrument, measuring electrode when the humidifier is delivered complete with control station and ion exchanger.
  • Page 41 Drawing no. 15 BNB bracket Type: BNB 1000-8000 Material: CrNi 18.8 2/3 mm M03182 M8 (enclose bolts M8x12 loose)
  • Page 42 Drawing no. 16 TYPE BNB 1000 BNB 2000 BNB 3000 BNB 4000 BNB 5000 BNB 8000 1210 VERSIONS: CRNI 18.8 1.5MM OR STEEL SHEET 1.5MM, STOVE-ENAMELLED PEARL WHITE HOLES EVENLY DISTRIBUTED MAKE D=8.5MM NUMBER OF HOLES SEE UNDER “E” LOAD MAX. 35KG...

  • Page 43: Examples For The Mounting Of Bnb Humidifiers

    5.2 Examples for the mounting of BNB humidifiers The following drawings No. 17 and 18 show the installation of a BNB water humidifier on brackets and in a tray. If the humidifier is installed on brackets, the safety overflow should be connected to the drain with a hose.
  • Page 44 Humidifier installation with wall brackets Drawing no. 17...
  • Page 45 Safety tray for water sensor Drawing no. 18...

  • Page 46: Commissioning Of Bnb Humidifiers

    5.3 Commissioning Preparation for commissioning a) The humidifying unit must be aligned exactly horizontally and in the direction of the corresponding air flow. b) All pipe connections must be made and connected correctly, securely and safely. c) The power supply is 220/48 V and is locked electrically with the fan. d) All other components must be assembled and installed correctly and reliably.

  • Page 47: Precautionary Measures During Operation

    Operating the system 1) The water tap is opened. 2) The hygrostat, i.e. the humidity control, is set to the level of the air humidity required. 3) If humidifying is required, water is automatically poured in up to the required level and the atomization is started.

  • Page 48: Accessories

    6. Accessories 6.1 Data sheet for safety transformers...

  • Page 49: Information On Conductivity Measuring Instrument

    6.2 Information on the conductivity measuring instrument The conductivity measuring instrument measures and monitors the conductivity of the demineralized water in µS/cm. For a measured value of 5 µS/cm, the floating contact activates the pre-alarm. The contact is closed via terminals X1.9 and X1.10 and opened by X1.9 and X1.8. For a measured value of 20 µS/cm, the floating contact activates the alarm signal.
  • Page 50 Conductivity measuring instrument Electrode Terminal assignment X1.1 0 - 1 V actual value output X1.8 K1 normally closed contact (0 - 50 µS/cm) (5 µS/cm) X1.2 Ground X1.9 K1 Pedestal pole X1.3 Electrode X1.10 K1 normally open contact X1.4 Electrode X1.11 0 V supply (N) X1.5...

This manual is also suitable for:

Bnb 2000Bnb 8000Bnb 4000Bnb 3000Bnb 5000

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