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Robur Next-R Installation, Use And Maintenance Instruction Manual

Gas unit heaters for use in industrial and commercial installations
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Installation, use and maintenance manual
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Summary of Contents for Robur Next-R

  • Page 1 Installation, use and maintenance manual Next-R Gas unit heaters for use in industrial and commercial installations Powered by natural gas/LPG 2021 ready...
  • Page 2 The rights of those who have legitimately filed the registered trademarks contained within this publication are not affected. With the aim of continuously improving the quality of its products, Robur S.p.A. reserves the right to modify the data and contents of this Installation, use and maintenance manual without prior notice.

  • Page 3: Table Of Contents

    Appliance positioning ............. 25 Periods of inactivity ............47 Minimum clearance distances........25 8 Appendices ����������������������������������������������������49 Support bracket ..............27 3 Heating engineer �������������������������������������������28 Product fiche............... 49 EU Declaration of conformity (DoC) �������������������55 Warnings ................28 Installation, use and maintenance manual – Next-R...

  • Page 4: Introduction

    CONTROL DEVICE In order to work, the Next-R unit requires a control device to be RECIPIENTS connected by the installer (see Paragraph 1.6  p. 22 ). This Manual is intended for: SYMBOLS AND DEFINITIONS II.1...

  • Page 5: Iii.2 Compliance

    EU directives and standards Earthing The Next-R series gas unit heaters are certified in accordance with European regulation GAR 2016/426/EU and meet the es- Electrical safety depends on effective earthing system, sential requirements of the following Directives: correctly connected to the appliance and installed ac- 2016/426/EU "Gas Appliances Regulation"...

  • Page 6: Iii.3

    Warnings 2281/2016/EU "Ecodesign requirements for air heating prod- ufacturer for any damage caused by incorrect installa- ▶ ucts" as amended and added. tion and/or improper use and/or failure to comply with Furthermore, they comply with the requirements of the follow- regulations and with the manufacturer's directions/in- ing standards: structions shall be disclaimed.

  • Page 7: Features And Technical Data

    ▶ Corrugated stainless steel heat exchangers with very large ▶ The Next-R series gas unit heater is an independent heating ap- exchange surface (R15, R20 models). pliance with airtight combustion circuit and forced air draft. Robur patented heat exchangers, made out of a special al- ▶...

  • Page 8: Dimensions

    Features and technical data DIMENSIONS 1.2.1 Axial gas unit heaters 1.2.1.1 R15/R20 Figure 1�1  Unit dimensions 400 (*) 176 (*) Flue gas exhaust Thermoformed door Combustion air inlet Limit thermostat reset button Power supply cables input Flue gas exhaust blind cover, alternative to the rear one (1) Gas connection 3/4"...
  • Page 9 Flue gas exhaust blind cover, alternative to the rear one (1) Power supply cables input Blind cover for access to the fan thermostat Gas connection 3/4" M Holes for fixing to the support bracket Thermoformed door Installation, use and maintenance manual – Next-R...
  • Page 10 Features and technical data 1.2.1.3 R40 Figure 1�3  Unit dimensions 370 (*) 405 (*) Flue gas exhaust Limit thermostat reset button Combustion air inlet Flue gas exhaust blind cover, alternative to the rear one (1) Power supply cables input Blind cover for access to the fan thermostat Gas connection 3/4"...
  • Page 11 Flue gas exhaust blind cover, alternative to the rear one (1) Power supply cables input Blind cover for access to the fan thermostat Gas connection 3/4" M Holes for fixing to the support bracket Thermoformed door Installation, use and maintenance manual – Next-R...
  • Page 12 Features and technical data 1.2.1.5 R60 Figure 1�5  Unit dimensions 810 (*) 405 (*) 1120 Flue gas exhaust Limit thermostat reset button Combustion air inlet Flue gas exhaust blind cover, alternative to the rear one (1) Power supply cables input Blind cover for access to the fan thermostat Gas connection 3/4"...
  • Page 13 Flue gas exhaust blind cover, alternative to the rear one (1) Power supply cables input Blind cover for access to the fan thermostat Gas connection 3/4" F Holes for fixing to the support bracket Thermoformed door Installation, use and maintenance manual – Next-R...
  • Page 14 Features and technical data 1.2.2 Centrifugal gas unit heaters 1.2.2.1 R30 C Figure 1�7  Unit dimensions 370 (*) 405 (*) 1031 Flue gas exhaust Limit thermostat reset button Combustion air inlet Flue gas exhaust blind cover, alternative to the rear one (1) Power supply cables input Blind cover for access to the fan thermostat Gas connection 3/4"...
  • Page 15 Flue gas exhaust blind cover, alternative to the rear one (1) Power supply cables input Blind cover for access to the fan thermostat Gas connection 3/4" M Holes for fixing to the support bracket Thermoformed door Installation, use and maintenance manual – Next-R...
  • Page 16 Features and technical data 1.2.2.3 R50 C Figure 1�9  Unit dimensions 580 469 620 (*) 405 (*) 1138 Flue gas exhaust Limit thermostat reset button Combustion air inlet Flue gas exhaust blind cover, alternative to the rear one (1) Power supply cables input Blind cover for access to the fan thermostat Gas connection 3/4"...
  • Page 17 1.2.1  p. 8 ). carried out by means of the revolving bracket OSTF020 (availa- Figure 1.11  p.  18 below details the centre distances between ble as an optional, Paragraph 2.5.4  p. 27 ). Installation, use and maintenance manual – Next-R...

  • Page 18: Components

    Features and technical data Figure 1�11  Position of vertical downflow gas unit heaters brackets Vertical suspension brackets Upper brackets centre distance Lower brackets centre distance Table 1�1  Centre distance of the vertical suspension brackets Model R30 V R40 V R50 V COMPONENTS 1.3.1 R15/R20 Figure 1�12 ...
  • Page 19 Features and technical data 1.3.2 R30/R40/R50/R60/R80 Figure 1�13  Internal components Electrical panel Controller for ignition, adjustment and flame control Terminal block Gas valve Limit thermostat Ignition transformer Combustion blower Flame sensor / ignition electrodes Differential pressure switch Installation, use and maintenance manual – Next-R...

  • Page 20: Electrical Wiring Diagram

    Features and technical data ELECTRICAL WIRING DIAGRAM 1.4.1 R15/R20 Figure 1�14  Electrical wiring diagram Ground Control panel 230V~50Hz Fan condenser Blower Internal modulation relay Ignition transformer M1 Limit thermostat M4 Controller for ignition, adjustment and flame control External request (not supplied) Gas valve Power level control contact RP7 Ignition electrodes...
  • Page 21 Internal modulation relay Blower M1 Limit thermostat Ignition transformer M2 Fan thermostat V1-V2 M4 Flame controller External request (not supplied) Pressure switch Power level control contact Gas valve Winter mode activation contact RP7 Ignition electrodes Installation, use and maintenance manual – Next-R...

  • Page 22: Operation Mode

    Features and technical data OPERATION MODE 1.6.3 OCTR000 2-key basic control The Next-R gas unit heater can be operated on two heat out- Figure 1�17  OCTR000 2-key basic control put levels (maximum and minimum), keeping the fan speed constant. To select the power level it is necessary to use a suitable control device (Paragraph 1.6 ...

  • Page 23: Technical Data

    Control through external request may be used on different intuitive way. contacts, available on the Next-R unit terminal block (Figures It may be used only in association with the OTRG005 1.14  p.  20 and 1.15  p.  21 ), to realize different features. In thermoregulator.
  • Page 24 Features and technical data nominal heat input 18,6 22,0 25,0 24,8 26,4 27,4 25,0 Temperature rise minimal heat input 13,0 15,0 15,9 15,7 18,0 17,6 17,2 length of throw (residual speed < 0,5 m/s) (1) 13,0 15,0 18,0 20,0 25,0 28,0 40,0 maximum...

  • Page 25: Transport And Positioning

    Figure 2�1  Airflow distribution MINIMUM CLEARANCE DISTANCES materials or components, in compliance with applicable regulations. 2.4.1 Distances from combustible or flammable materials Keep the appliance away from combustible or flammable ▶ Installation, use and maintenance manual – Next-R...
  • Page 26 Transport and positioning 2.4.2 Clearances around the appliance operation and maintenance. The minimum clearance distances are required for safety, 2.4.2.1 Axial gas unit heaters Figure 2�2  Clearances > 350 > 200 > 400 mm > 500 mm < 3,5 m > 2,2 m Gas unit heater width Object or structure underneath the gas unit heater The recommended height from the floor to the gas unit...

  • Page 27: Support Bracket

    (Figure 2.6  p. 27 ). Robur provides easy mounting support brackets as an optional, suitably designed for Next-R series gas unit heaters, which allow Do not use other systems to hang the gas unit heater simplifying the wall fixing.

  • Page 28: Heating Engineer

    Non compliant gas pressure may damage the appliance 3/4" M (R15, R20, R30, R40, R50 models) ▶ and be hazardous. 3/4" F (R60, R80 models) ▶ Table 3�1  Network gas pressure of Next-R series gas unit heaters Gas supply pressure [mbar] Product Country of destination G25.1 G25.3 G2.350...

  • Page 29: Combustion Products Exhaust

    2� Remove the blind cover of the upper flue gas ex- haust (detail 7 in the dimensional diagrams, Paragraph Gas unit heaters of the Next-R series can be installed to one of 1.2  p. 8 ) from the top panel. the following ways.
  • Page 30 Heating engineer 3.3.3.1 B23 type installation with wall flue gas exhaust pipe 3.3.3.3 C13 type installation with separate ducts Figure 3�1  B23 type installation with Ø 80 flue gas exhaust pipe Figure 3�3  C13 type installation with Ø 80 separate ducts Table 3�2  B23 type maximum allowed length Table 3�4 ...
  • Page 31 The total allowed pressure drop in the flue gas exhaust system depends on the unit model (Table 3.11  p. 32 ). The pressure drops of the flue and air pipes available as Robur optional are shown in Table 3.12  p. 32 .
  • Page 32 The above lengths are intended to be approximate values for standard installations where the air and flue gas ex- The Ø 80, 110 and 130 pipes available as Robur optional haust ducts follow linear paths as shown in the respec- are made of stainless steel, while the Ø...

  • Page 33: Opening The Grille Louvres

    7 m of Ø 80 flue gas exhaust pipe front grille, the louvres of the grille must be opened, as shown in ▶ 1 90° Ø 80 elbow on the flue gas exhaust pipe Figure 3.10  p. 34 . ▶ Installation, use and maintenance manual – Next-R...

  • Page 34: Air Ducting

    Figure 3�10  Opening the gas unit heater grille louvres For this purpose, the delivery outlet of the Next-R C gas unit heat- ers is provided with fixing flanges for the delivery air ducting. Refer to the Paragraph 1.2.2  p.  14 for the dimensions of the flange connection.

  • Page 35: Control System

    The thermoregulator must be installed on the wall in a suitable position, using expansion screws. Connection of the thermoregulator is made on the wiring termi- nal block located in the electrical panel inside the unit. Installation, use and maintenance manual – Next-R...
  • Page 36 1� Access the connection terminal block according to Proce- Table 4�1  OTRG005 thermoregulator connection dure 4.2  p. 34 . 2� Remove 27 and 28 temporary jumpers on the terminal block OTRG005 thermoregulator Next-R Line (Paragraph 1.4  p. 20 ). Neutral 3� Reuse electrical bridge cable 28 to make the connection be- tween terminals NC and 2 (Figure 4.4 ...
  • Page 37 5� For further information refer to the instruction sheet sup- OTRG005 thermoregulator is connected as described in plied with the OSWR000 Genius software. Paragraph 4.4.3  p. 35 . The cable may not be longer than 1100 metres. Installation, use and maintenance manual – Next-R...
  • Page 38 Electrical installer Figure 4�6  USB/RS485 converter connection A signal OTRG005 thermoregulator B signal USB/RS485 converter 4.4.6 External request Figure 4�7  Connection of external request for gas unit heater start/stop management Depending on the required operation, it is required to arrange: Request device (e.g. thermostat, timer, switch, ...) equipped ▶...
  • Page 39 Paragraph 4.4.6.3  p.  39 in relation to the gas programmable timer allows subordinating the gas unit heater unit heater two power level management. activation, even if requested by the room thermostat, to a cen- tralized request. Installation, use and maintenance manual – Next-R...
  • Page 40 Electrical installer Figure 4�11  Multiple appliances wiring diagram with one programmable timer and more room thermostats FUSE FUSE FUSE 4.4.7 Positioning the control system hot air flow from the unit itself, etc.). If possible, do not place the control system on walls bor- Install the chosen thermostat/control system according to the ▶...

  • Page 41: First Start

    Should the TAC find any non conformities, the user/installer is Robur TAC. NEITHER the user NOR the installation tech- bound to perform any corrective procedures required by the nician is authorised to perform such operations, under TAC.
  • Page 42 First start-up 5.2.1 R15/R20/R30/R40/R50 10� After about 2 minutes from the burner ignition, the combus- tion control at minimum power can be carried out. 11� Ensure that the CO value corresponds to the value indicated The simple check of CO values corresponds to steps 8 in the "Minimal heat input"...
  • Page 43 See Table 3.1  p. 28 -8 ½ -3 ¾ G2.350 full open -3 ¾ -3 ¾ 10,0 full open 10,1 -10 ¼ 10,1 A tolerance of ±0,3% is applied to all values of CO percentage in fumes. Installation, use and maintenance manual – Next-R...
  • Page 44 First start-up Table 5�5  R50 gas valve setting table Screw pre-adjustment CO₂ percentage in flue gases Gas network pressure Throttle Offset Minimal heat input Nominal heat input Type mbar turns turns -3 ¾ full open -3 ¾ G25.1 -16 ¾ -3 ¾ 10,0 10,5 G25.3...

  • Page 45: Gas Changeover

    (B) on the control (Figure 6.1  p. 45 ). 6� In case of flame locking, press the reset button (A). First start-up may exclusively be carried out by a Robur TAC (Chapter 5  p. 41 ). After a long period of unit inactivity or at the first start-up,...

  • Page 46: Restarting A Locked-Out Unit

    Normal operation 6.2.3 It is recommended that the heating request is deacti- OTRG005 thermoregulator vated during the summer season by opening contact Z9 by means of the provided control device (thermostat, Refer to the instructions in the relevant manual. chronothermostat or voltage-free contact). 6.2.4 OCDS008 digital chronothermostat 6.2.2...

  • Page 47: Maintenance

    Protective cap of the limit thermostat reset button PERIODS OF INACTIVITY Should you foresee to leave the appliance inactive for a long pe- riod of time, disconnect it from the electrical and gas mains. Installation, use and maintenance manual – Next-R...
  • Page 48 Maintenance How to deactivate the appliance for long periods of „ Check whether any maintenance operations are required time (contact the TAC; see Paragraph 7.2  p. 47 ). „ Ensure that the flue gas exhaust duct and the air intake 1� Switch the appliance off (Paragraph 6.2  p. 45 ). are not obstructed.

  • Page 49: Appendices

    (*) energy (GCV) Emission efficiency η 94,7 s,flow Seasonal space hea�ng η 78,0 energy efficiency Contact details Robur SPA Via Parigi 4/6 I-24040 Zingonia (BG) (*) Not required for electric warm air heaters. Installation, use and maintenance manual – Next-R...
  • Page 50 94,2 s,flow Seasonal space hea�ng η 78,0 energy efficiency Contact details Robur SPA Via Parigi 4/6 I-24040 Zingonia (BG) (*) Not required for electric warm air heaters. Figure 8�4 Table 9 Informa�on requirements for warm air heaters Model(s): Informa�on to iden�fy the model(s) to which the informa�on relates:...
  • Page 51 (*) energy (GCV) Emission efficiency η 93,6 s,flow Seasonal space hea�ng η 78,0 energy efficiency Contact details Robur SPA Via Parigi 4/6 I-24040 Zingonia (BG) (*) Not required for electric warm air heaters. Installation, use and maintenance manual – Next-R...
  • Page 52 93,8 s,flow Seasonal space hea�ng η 78,0 energy efficiency Contact details Robur SPA Via Parigi 4/6 I-24040 Zingonia (BG) (*) Not required for electric warm air heaters. Figure 8�8 Table 9 Informa�on requirements for warm air heaters Model(s): Informa�on to iden�fy the model(s) to which the informa�on relates:...
  • Page 53 (*) energy (GCV) Emission efficiency η 94,2 s,flow Seasonal space hea�ng η 78,6 energy efficiency Contact details Robur SPA Via Parigi 4/6 I-24040 Zingonia (BG) (*) Not required for electric warm air heaters. Installation, use and maintenance manual – Next-R...
  • Page 54 In standby mode 0,000 oxides (*) energy (GCV) Emission efficiency η 93,8 s,flow Seasonal space hea�ng η 78,0 energy efficiency Contact details Robur SPA, Via Parigi 4/6, I-24040 Zingonia (BG) (*) Not required for electric warm air heaters.

  • Page 55: Eu Declaration Of Conformity (Doc)

    Parigi 4/6 24040 Verdellino/Zingonia (BG) Italy Tel. +39 035.888.111 Fax +39 035.884.165 capitale sociale € 2.028.000,00 i.v. iscritta al Registro Imprese di Bergamo n.154968 codice fiscale/partita iva 00373210160 V.A.T. code IT 00373210160 società soggetta all'attività di direzione e coordinamento di Fin Robur S.r.l.
  • Page 56 Robur mission Robur is dedicated to dynamic progression in research, development and promotion of safe, environmentally-friendly, energy-efficiency products, through the commitment and caring of its employees and partners. Robur S.p.A. advanced technologies for air conditioning via Parigi 4/6 24040 Verdellino/Zingonia (BG) Italy +39 035 888111 - F +39 035 884165 www.robur.com export@robur.it...

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