Robur Next-R Installation, Use And Maintenance Manual
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Robur Next-R Installation, Use And Maintenance Manual

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Installation, use and maintenance manual
Next-R
Gas unit heaters for use in industrial and commercial
installations
Powered by natural gas/LPG
2021
ErP
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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

    Troubleshooting ..........p. 50 Minimum clearance distances ....... p. 26 Periods of inactivity ........... p. 50 Support bracket ..........p. 27 8 Appendices 3 Heating engineer ................p. 51 ............p. 28 Product fiche ............p. 51 Warnings ..............p. 28 Installation, use and maintenance manual – Next-R...

  • Page 4: Iintroduction

    CONTROL DEVICE In order to work, the Next-R unit requires a control de- RECIPIENTS vice to be connected by the installer (see Paragraph This Manual is intended for: 1.6 ...
  • Page 5 „ Do not touch the flue gas exhaust before it has Proper maintenance assures the efficiency and cooled down. good operation of the appliance over time. „ Maintenance must be performed according to the Electrocution hazard Installation, use and maintenance manual – Next-R...

  • Page 6: Iii.2 Conformity

    EU directives and standards er's directions/instructions shall be disclaimed. The Next-R series gas unit heaters are certified in ac- cordance with European regulation GAR 2016/426/EU and meet the essential requirements of the following...

  • Page 7: Features And Technical Data

    ▶ 1.1.2 Operation Cylindrical stainless steel combustion chamber. ▶ The Next-R series gas unit heater is an independent heat- Corrugated stainless steel heat exchangers with very ▶ ing appliance with airtight combustion circuit and forced large exchange surface (R15, R20 models).

  • 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 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 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 (*) 1119 Flue gas exhaust Limit thermostat 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 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 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 (Paragraph 1.2.1  p. 8 ). bracket OSTF020 (available as an optional, Paragraph Figure 1.11  p.  18 below details the centre distances be- 2.5.4  p. 28 ). tween the vertical suspension brackets for the different 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 CV Fan condenser Blower K1 Internal modulation relay TR Ignition transformer M1 Limit thermostat V1 Fan M4 Controller for ignition, adjustment and flame control Z9 External request (not supplied) Q1 Gas valve 27 Power level control contact...
  • Page 21 TR Ignition transformer M2 Fan thermostat V1-V2 M4 Flame controller Z9 External request (not supplied) NP Pressure switch 27 Power level control contact Q1 Gas valve 28 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 burner Figure 1.17   OCTR000 2-key basic control power 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 differ- ing the operational parameters of more than one gas unit ent contacts, available on the Next-R unit terminal block heater with the relative control boards connected in cas- (Figures 1.14  p.  20 and 1.15  p.  21 ), to realize different cade and also resetting any locking.
  • Page 24 Features and technical data Heating mode nominal (1013 mbar - 15 °C) (1) 15,5 20,5 28,0 38,3 49,0 69,0 84,0 Heat input minimum (1) 10,3 13,2 16,8 23,0 31,0 41,4 54,0 nominal 14,1 18,7 25,5 35,0 44,6 62,8 76,4 Heat output minimum 12,7 16,3...

  • Page 25: Transport And Positioning

    ▶ ▶ close to the main doors, so that they can also operate as air barriers when doors are opened. APPLIANCE POSITIONING The unit must be installed in the room to be heated. Installation, use and maintenance manual – Next-R...

  • Page 26: Minimum Clearance Distances

    Transport and positioning Figure 2.1   Airflow distribution MINIMUM CLEARANCE DISTANCES applicable regulations. 2.4.2 Clearances around the appliance 2.4.1 Distances from combustible or flammable materials The minimum clearance distances are required for Keep the appliance away from combustible or flam- ▶ safety, operation and maintenance. mable materials or components, in compliance with 2.4.2.1 Axial gas unit heaters Figure 2.2  ...

  • Page 27: Support Bracket

    Robur provides easy mounting support brackets as an op- 2.5.2 Centrifugal gas unit heaters tional, suitably designed for Next-R series gas unit heaters, For centrifugal gas unit heaters, the following mounting which allow simplifying the wall fixing.

  • Page 28: Heating Engineer

    Heating engineer 2.5.4 OSTF020 revolving wall support bracket mounting brackets, as they must be suspended from the (R15, R20 models) ceiling of the heated room. The gas unit heater is equipped, on the fan side, with ap- For R15 and R20 gas unit heaters, the OSTF020 revolving propriate vertical suspension brackets, to which the gas bracket (available as an optional) allows the gas unit heat- unit heater supports can be connected.

  • Page 29: Combustion Products Exhaust

    Ø 80 mm with gasket, on the rear, at the top (see di- ▶ A second stage pressure reducer, close to the appli- mensional diagrams, Paragraph 1.2  p. 8 ). ▶ ance. For all models, it is possible to move the fumes gas outlet Installation, use and maintenance manual – Next-R...
  • Page 30 Upon request, Robur can supply rigid pipes, coaxial ducts and ter- minals, all of approved type. Gas unit heaters of the Next-R series can be installed to one of the following ways. Right side view...
  • Page 31 Figure 3.4   C13 type installation with wall coaxial terminal and Ø 80 ducts Table 3.7   C33 type maximum allowed length with 80/125 roof coaxial terminal and Ø 80 ducts Indicative maximum lengths (m) Air pipe Flue gas exhaust pipe View from above Installation, use and maintenance manual – Next-R...
  • Page 32 (Table 3.11  p. 33 ). The Ø 80, 110 and 130 pipes available as Robur op- tional are made of stainless steel, while the Ø 100 adapters available as Robur optional are made of aluminium.
  • Page 33 70,0 Ø 130/210 roof 13,2 23,5 (1) Can be used only with OSTF009 support bracket If horizontal flue gas exhaust pipes having lengths above 1 m are installed, the flue gas exhaust pipe Installation, use and maintenance manual – Next-R...
  • Page 34 Heating engineer must be mounted with a downward slope of 2 to 3 Figure 3.8   Wall terminal position cm each 1-m length (Figure 3.7  p. 34 ), to prevent condensate drops entering the unit. If vertical flue gas exhaust pipes longer than 1,5 m are installed, at the base of the vertically mounted flue gas exhaust pipe a T-shaped piece must be fitted to collect the condensate, to prevent any...

  • Page 35: Air Ducting

    Electrical installer For this purpose, the delivery outlet of the Next-R C gas Figure 3.9   Example of a vertical downflow gas unit heater unit heaters is provided with fixing flanges for the delivery installation air ducting. Refer to the Paragraph 1.2.2  p.  14 for the dimensions of the flange connection.

  • Page 36: Electrical Power Supply

    Electrical installer 4.4.1 OCDS012 1-key basic control 5 on dimensional diagrams, Paragraph 1.2  p. 8 ). 3. Insert cables through cable gland (detail 3 on dimen- How to connect the OCDS012 1-key basic con- sional diagrams, Paragraph 1.2  p.  8 ). PG9 cable trol glands are suitable for cables with diameters from 3,5 to 8 mm.
  • Page 37 Connection of the thermoregulator is made on the Figure 4.4   OTRG005 thermoregulator connection OTRG005 thermoregulator Gas unit heater terminal block Room temperature probe (supplied) J6 electrical bridge Installation, use and maintenance manual – Next-R...
  • Page 38 Electrical installer 4.4.4 OCDS008 digital chronothermostat OTRG005 thermoregulator is connected as de- scribed in Paragraph 4.4.3  p. 37 . How to connect the OCDS008 digital chrono- To connect OCDS008 chronothermostat to thermostat OTRG005 thermoregulator, use a two-pole cable (e.g. H03RR-F or H03VV-F) with a section between The chronothermostat must be installed on the 0,5 mm and 2,5 mm...
  • Page 39 2. Connect the voltage-free contact of the external re- quest, using a 2x1 mm² cable, to Z9-Z9 terminals of the terminal block, as shown in Figure 4.7  p. 39 . The cable may not be longer than 20 metres. Installation, use and maintenance manual – Next-R...
  • Page 40 Electrical installer thermostat manufacturer's documentation), respecting Figure 4.8   Summer/winter switch connection the specifications in Paragraph 4.4.6.1  p.  39 in relation Summer/winter to the gas unit heater start/stop request and in Paragraph switch 4.4.6.3  p. 40 in relation to the gas unit heater two power level management.
  • Page 41 If this At about 1,5 m from the floor, protected against air ▶ is not possible, shield the control system by placing a draughts, direct exposure to sun rays and direct heat Installation, use and maintenance manual – Next-R...

  • Page 42: First Start-Up

    All situations that may involve operation abnormali- ▶ out by a Robur TAC. NEITHER the user NOR the in- ties or are potentially hazardous. stallation technician is authorised to perform such 5.1.3 Non-compliant system and corrective operations, under penalty of voiding the warranty.
  • Page 43 (C) of the gas valve. system, or manual close of contact Z9 (Z91-Z92 16. Close the thermoformed door. terminals). Figure 5.1   Gas valve Offset pressure intake Gas mains pressure intake Offset adjustment screw Throttle adjustment screw Installation, use and maintenance manual – Next-R...
  • Page 44 First start-up Table 5.1   R15 gas valve setting table Gas network Screw pre-adjustment Offset pressure percentage in fumes pressure Throttle Offset nominal Minimal heat input Nominal heat input Type mbar turns turns -10 ½ -3 ¾ full open G25.1 -10 ½ -3 ¾...
  • Page 45 13. Repeat steps 3 to 7 (excluding step 6) to reactivate the Gas mains pressure intake minimum power operation; check again and, if neces- Offset adjustment screw sary, correct the CO value in such conditions by actu- ating the offset adjustment screw. Installation, use and maintenance manual – Next-R...

  • Page 46: Gas Changeover

    First start-up may exclusively be carried out by a operation due to the presence of air in the gas Robur TAC (Chapter 5  p. 42 ). piping. Never power the appliance off while it is run- 6.2.1 OCDS012 1-key basic control...
  • Page 47 1. Ensure that contact 1-3 is closed by the factory in- and light the locking state indicator lamp (C) on the stalled temporary jumper. If a summer/winter selector Installation, use and maintenance manual – Next-R...

  • Page 48: Efficiency

    Normal operation switch (Paragraph 4.4.6.2  p.  39 ) has been installed, Install horizontal flow units observing requirements ▶ ensure that the selector switch is in the "winter" posi- on height above ground (Figure 2.2  p. 26 ). tion (contact 1-3 closed). Direct the warm air flow downwards, using the hori- ▶...

  • Page 49: Maintenance

    ALWAYS indicates an abnormal condition. Before resetting, it is therefore advisable to search Protective cap of the limit thermostat reset button for the reasons that led to the unit overheating. If frequent stops occur, contact Robur TAC. Installation, use and maintenance manual – Next-R...

  • Page 50: Troubleshooting

    Maintenance TROUBLESHOOTING „ If gas is being supplied, check the gas valve for voltage during sparkling. If the correct voltage is If the gas unit heater does not start in heating mode nor applied and the blower is running, check that the in ventilation, follow the steps below to identify the most nozzle is not obstructed.

  • Page 51: 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 52 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 53 (*) 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 54 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 55 (*) 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 56 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 60 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.it robur@robur.it...

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