1. Manuals
  2. Brands
  3. Robur Manuals
  4. Gas Heater
  5. Next-G 20
  6. Instructions for installation, use and maintenance manual

Robur Next-G 20 Instructions For Installation, Use And Maintenance Manual

Condensing gas unit heaters for use in industrial and commercial installations
Hide thumbs Also See for Next-G 20:
Table of Contents

Advertisement

Quick Links

Download this manual
Installation, use and maintenance manual
Next-G
Condensing gas unit heaters
for use in industrial and commercial installations
Powered by natural gas/LPG

Advertisement

Table of Contents
loading
Need help?

Need help?

Do you have a question about the Next-G 20 and is the answer not in the manual?

Questions and answers

Subscribe to Our Youtube Channel

Related Manuals for Robur Next-G 20

Summary of Contents for Robur Next-G 20

  • Page 1 Installation, use and maintenance manual Next-G Condensing gas unit heaters for use in industrial and commercial installations Powered by natural gas/LPG...
  • 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

    TABLE OF CONTENTS Introduction 4 Electrical installer ................p. 4 ............p. 33 Recipients ..............p. 4 Warnings ..............p. 33 Control device ............p. 4 Electrical systems ..........p. 34 Available languages ..........p. 4 Electrical power supply ........p. 34 Control system............. p. 34 II Symbols and definitions .........

  • Page 4: Iintroduction

    SYMBOLS AND DEFINITIONS II.1 KEY TO SYMBOLS heating), summer operation (ventilation) or switch off. Remote control OCDS015 = Robur control device that integrates the functions of room temperature control, re- DANGER mote control and report of any anomalies of one or more Next-G gas unit heaters, also divided over several zones.
  • Page 5 Warnings The appliance must only be used for the purpos- „ Do not remove guards during operation, and in es for which it has been designed. Any other use is any case prior to disconnecting the power supply. deemed hazardous. Incorrect use may affect oper- Burn hazard ation, duration and safety of the appliance.

  • Page 6: Iii.2 Compliance

    Warnings may exclusively be carried out by a TAC, using only convection air heaters for space heating not exceed- original spare parts. ing a net heat input of 300 kW. „ In the event of failure of the appliance and/or III.2.2 Other applicable provisions and standards breakage of any component, do not attempt to The design, installation, operation and maintenance of...

  • Page 7: Features And Technical Data

    Cylindrical stainless steel combustion chamber. The combustion circuit is room sealed and meets the re- ▶ Robur patented heat exchangers, made out of a spe- ▶ quirements for type C appliances: combustion air supply cial aluminium die-cast alloy, with horizontal finning...

  • Page 8: Dimensions

    Features and technical data DIMENSIONS 1.2.1 Axial gas unit heaters 1.2.1.1 G 20 Figure 1.1  Unit dimensions 176 (*) 400 (*) 579 (EC) Ø 80mm flue gas exhaust Limit thermostat reset button Combustion air inlet Ø 80 mm Flue gas exhaust blind cover, alternative to the rear one (1) Power supply cables input Condensate drain siphon (supplied as standard) Gas connection 3/4"...
  • Page 9 Features and technical data 1.2.1.2 G 30 Figure 1.2  Unit dimensions 405 (*) 370 (*) 689 (EC) Ø 80mm flue gas exhaust Limit thermostat reset button Combustion air inlet Ø 80 mm Flue gas exhaust blind cover, alternative to the rear one (1) Power supply cables input Condensate drain siphon (supplied as standard) Gas connection 3/4"...
  • Page 10 Features and technical data 1.2.1.3 G 35 Figure 1.3  Unit dimensions 405 (*) 370 (*) 689 (EC) Ø 80mm flue gas exhaust Limit thermostat reset button Combustion air inlet Ø 80 mm Flue gas exhaust blind cover, alternative to the rear one (1) Power supply cables input Condensate drain siphon (supplied as standard) Gas connection 3/4"...
  • Page 11 Features and technical data 1.2.1.4 G 45 Figure 1.4  Unit dimensions 405 (*) 370 (*) 743 (EC) Ø 80mm flue gas exhaust Limit thermostat reset button Combustion air inlet Ø 80 mm Flue gas exhaust blind cover, alternative to the rear one (1) Power supply cables input Condensate drain siphon (supplied as standard) Gas connection 3/4"...
  • Page 12 Features and technical data 1.2.1.5 G 60 Figure 1.5  Unit dimensions 405 (*) 620 (*) Ø 80mm flue gas exhaust Limit thermostat reset button Combustion air inlet Ø 80 mm Flue gas exhaust blind cover, alternative to the rear one (1) Power supply cables input Condensate drain siphon (supplied as standard) Gas connection 3/4"...
  • Page 13 Features and technical data 1.2.1.6 G 75 Figure 1.6  Unit dimensions 405 (*) 810 (*) 1120 Ø 80mm flue gas exhaust Limit thermostat reset button Combustion air inlet Ø 80 mm Flue gas exhaust blind cover, alternative to the rear one (1) Power supply cables input Condensate drain siphon (supplied as standard) Gas connection 3/4"...
  • Page 14 Features and technical data 1.2.1.7 G 90 Figure 1.7  Unit dimensions 405 (*) 1010 (*) 1059 1100 743 (EC) 1320 1017 Ø 80mm flue gas exhaust Limit thermostat reset button Combustion air inlet Ø 80 mm Flue gas exhaust blind cover, alternative to the rear one (1) Power supply cables input Condensate drain siphon (supplied as standard) Gas connection 3/4"...
  • Page 15 Features and technical data 1.2.2 Centrifugal gas unit heaters 1.2.2.1 G 30 C Figure 1.8  Unit dimensions 405 (*) 370 (*) 1072 Ø 80mm flue gas exhaust Limit thermostat reset button Combustion air inlet Ø 80 mm Flue gas exhaust blind cover, alternative to the rear one (1) Power supply cables input Condensate drain siphon (supplied as standard) Gas connection 3/4"...
  • Page 16 Features and technical data 1.2.2.2 G 60 C Figure 1.9  Unit dimensions 405 (*) 620 (*) 1138 Ø 80mm flue gas exhaust Limit thermostat reset button Combustion air inlet Ø 80 mm Flue gas exhaust blind cover, alternative to the rear one (1) Power supply cables input Condensate drain siphon (supplied as standard) Gas connection 3/4"...

  • Page 17: Components

    Features and technical data COMPONENTS Figure 1.10  Internal components Electrical panel GEN10 board display Gas valve GEN10 electronic board Terminal block Fan terminal block Controller for ignition, adjustment and Limit thermostat reset button 10 Flame sensor / ignition electrodes flame control Ignition transformer 11 Combustion blower Installation, use and maintenance manual –...

  • Page 18: Electronic Board

    FW version of the GEN10 board, available on request from graph 5.4  p. 48 ). the Robur technical service. If you do not wish to use the supplied room probe, it will The types of service requests supported will depend on...

  • Page 19: Controls

    Features and technical data by the appliance via the supplied room probe temperature below the setpoint is detected and the gas fixed power heating, with setpoint from 0-10 V input unit heater detects, via the destratification probe, that ▶ and room temperature measured by the appliance via there is sufficient stratified heat to be used instead of the supplied room probe starting the gas unit heater for heating.
  • Page 20 The document describing the mapping and Figure 1.17  OTRG005 thermoregulator meaning of the Modbus registers implemented on the GEN10 board is available on-demand from Robur technical service. 1.6.4 OCDS012 1-key basic control Figure 1.15  OCDS012 1-key basic control The thermoregulator is a device that can directly manage...
  • Page 21 Reset. communication in the form of a 0-10 V DC signal. ▶ Setting the heating setpoint (comfort, reduced or an- For managing the request signal ("HEAT." contact), Robur ▶ tifreeze). provides as optional different models of thermostats and Automatic management of power modulation on two chronothermostats.

  • Page 22: Technical Data

    Features and technical data TECHNICAL DATA Table 1.3  Technical data Axial fan models with fixed speed G 20 G 30 G 35 G 45 G 60 G 90 Heating operation nominal (1013 mbar - 15 °C) 19,5 28,0 34,5 43,0 58,0 90,0 Heat input minimum...
  • Page 23 Features and technical data G 20 EC G 30 EC G 35 EC G 45 EC G 60 EC G 75 EC G 90 EC Heating operation nominal (1013 mbar - 15 °C) 19,5 28,0 34,5 43,0 58,0 75,0 90,0 Heat input minimum 12,3...

  • Page 24: Transport And Positioning

    Transport and positioning G 30 C G 60 C Installation data at maximum available head m³/h 2500 5400 Air flow free blowing m³/h 3550 6500 maximum useful pressure head minimum pressure drop on heat flow delivery width Dimensions height depth 1072 1138 Weight...

  • Page 25: Minimum Clearance Distances

    We do not recommend installing the gas unit heaters at heights below 2,5 m from the floor. SUPPORT BRACKET Robur provides easy mounting support brackets as an op- 2.4.2.2 Centrifugal gas unit heaters tional, suitably designed for Next-G series gas unit heat- The position of gas unit heaters with centrifugal fan must ers, which allow simplifying the wall fixing.

  • Page 26: Heating Engineer

    G 30 C G 60 C 1400 All Robur support brackets are supplied with bolts and the rear support plate. For mounting instructions of the brackets, refer to Gas unit heater fixing points centre distance the relevant instruction sheets.

  • Page 27: Combustion Products Exhaust

    Heating engineer 3.2.2 Mandatory shut-off valve 3.2.4 Supply gas pressure Provide a gas shut-off valve (manual) on the gas supply ▶ This appliance is equipped for a maximum gas line, next to the appliance, to isolate it when required. supply pressure of 50 mbar. Provide a three-piece pipe union or similar system to ▶...
  • Page 28 In any case, use approved ducts according to the type of installation to be made. Upon request, Robur can supply suitable rigid pipes, coaxial ducts and terminals. Gas unit heaters of the Next-G series can be installed to...
  • Page 29 Heating engineer Table 3.3  B23 type maximum allowed length with roof flue gas Table 3.5  C13 type maximum allowed length with 80/125 wall exhaust pipe coaxial terminal (optional OSCR007) and Ø 80 ducts Indicative maximum lengths (m) Indicative maximum lengths (m) Flue gas exhaust pipe Next-G Air pipe Flue gas exhaust pipe...
  • Page 30 (Table 3.11  p. 31 ). 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...
  • Page 31 Heating engineer Table 3.11  Data for the calculation of the air/fumes system with pipes found on the market G 20 G 30 G 35 G 45 G 60 G 75 G 90 Installation data Nominal heat Flue temperature °C 82,0 75,0 85,0 100,0 79,0...

  • Page 32: Flue Gas Condensate Drain

    Heating engineer in force. 2 x 13,1 Pa = 26,2 Pa Ø 80 air pipe ▶ If vertical flue gas exhaust pipes longer than 1,5 m 10 m x 5,8 Pa/m = 58,0 Pa are installed, at the base of the vertically mounted Total pressure drop = 163,2 Pa flue gas exhaust pipe a T-shaped piece must be...

  • Page 33: Air Ducting

    Electrical installer 5. Adjust the siphon so that the outlet port of the siphon (Table 1.3  p. 22 ). is facing the intended path of the drain pipe (Figure Use plastic materials resistant to acidity pH 3-5. ▶ 3.9  p. 33 ). Provide for min.

  • Page 34: Electrical Systems

    Electrical installer long run (occasional blackouts are tolerated). Figure 4.1  Power supply connection „ To turn the appliance on and off, exclusively use Phase the suitably provided control device. Neutral P.E. Safety earthing ELECTRICAL SYSTEMS Components NOT SUPPLIED: Electrical connections provide: P.E.
  • Page 35 5 m length). on the GEN10 board is available on-demand from 3. Connect the wires to the terminal block as shown in Robur technical service. Figure 4.4  p. 36 . 4. If there is an external request for managing start/stop of the gas unit heater (e.g.
  • Page 36 Electrical installer 4.4.5 OTRG005 thermoregulator Figure 4.4  2-key basic control connection The thermoregulator must be installed on the wall in a suitable position, using expansion screws. Connection of the thermoregulator is made on the wiring NO NC NO NC VENT. HEAT. terminal block located in the electrical panel inside the RESET ALARM...
  • Page 37 Electrical installer Table 4.1  Connections between the thermoregulator and the gas unit heater OTRG005 thermoregulator Next-G Recommended colour Connector Terminal Type Description Terminal Input phase L AUX brown Input neutral N AUX blue Input Gas unit heater operation feedback "RESET" grey Output RES Reset of ignition/flame control device "RESET"...
  • Page 38 Electrical installer Figure 4.6  OCDS008 digital chronothermostat connection OTRG005 thermoregulator OCDS008 digital chronothermostat 4.4.7 OSWR000 Genius software for remote 3. Connect the OTRG005 thermoregulators in parallel, as management of gas unit heaters shown in Figure 4.7  p. 39 . 4. Check that the JP jumper is open on all OSWR000 Genius software for remote management of thermoregulators.
  • Page 39 Electrical installer Figure 4.7  Modbus network connection diagram A signal B signal J4 J5 J6 J4 J5 J6 1 1 2 1 1 2 1 1 2 1 1 2 1 1 2 1 1 2 1 1 2 1 1 2 USB/RS485 converter Thermoregulator n°...
  • Page 40 Electrical installer 4.4.9 External request How to connect the external request for gas unit heater power level management Depending on the required operation, it is required to arrange: 1. Access the electrical board of the appliance according Request device (e.g. thermostat, timer, switch, ...) ▶...
  • Page 41 Electrical installer more than one gas unit heater using a single external in Paragraph 1.6.9  p. 21 ), up to 100 gas unit heaters. request. If you do not want to use these solutions, the central- In the case of centralized management of multiple gas ized management of start/stop can be done as described unit heaters start/stop, advice given is to use: in Figure 4.11 ...

  • Page 42: Temperature Probes Inputs

    Electrical installer Figure 4.11  Multiple appliances wiring diagram with one programmable timer and more room thermostats 4.4.10 Positioning the control system TEMPERATURE PROBES INPUTS Install the chosen thermostat/control system accord- In order to extend the available features, the Next-G ing to the positioning instructions given in Paragraph gas unit heater allows up to three NTC 10k temperature 4.5.1 ...
  • Page 43 Electrical installer Room probe (supplied) For further information refer to the instruction ▶ Destratification probe sheet supplied with the probe. ▶ Outdoor probe ▶ Figure 4.13  Destratification probe connection Cable to be used for temperature probes con- nection 2x0,5 mm² up to 40 m For industrial environments, a shielded cable should be used, connecting the shield to the right- hand terminal of the contact to which the probe is...

  • Page 44: 0-10 V Input

    TAC shall not perform first start-up and the bustion parameters and may exclusively be carried appliance shall not be commissioned. out by a Robur TAC. NEITHER the user NOR the in- These situations may be: stallation technician is authorised to perform such Failed compliance with minimum clearances.
  • Page 45 CO value will also be at minimum values). If the required CO settings cannot be reached, contact Robur. The operation request for checking combustion Table 5.1  Display messages for chimney sweep function Message Meaning Action Chimney sweep function is active at minimum capacity CS.LO / UAIt...
  • Page 46 First start-up Table 5.2  Next-G 20 gas valve setting table GO_" again to indicate that the combustion control at maximum power can be carried out. Offset percentage in fumes 14. Ensure that the CO value corresponds to the value pressure network indicated in the "Nominal heat input"...
  • Page 47 First start-up Table 5.5  Next-G 45 gas valve setting table chimney sweep function at maximum power. 10. The display shows the letters "CS.HI" (chimney sweep Offset percentage in fumes high power), alternating once again with the flashing pressure network message "UAIt" (wait) which indicates that the ma- Minimal heat Nominal heat pressure...

  • Page 48: Gas Changeover

    First start-up Table 5.7  Next-G 75 gas valve setting table GAS CHANGEOVER Offset percentage in fumes For gas change instructions, refer to the rele- pressure network Minimal heat Nominal heat vant documentation. pressure nominal input input Type mbar SETTING THE PARAMETERS G25.1 Paragraph dedicated to TACs and installers.
  • Page 49 Modbus registers implemented both of the following conditions are met: on the GEN10 board is available on-demand from the temperature measured by the destratification Robur technical service. ▶ probe is higher than the setpoint the temperature differential is greater than the value 5.4.6.2 Without a Modbus controller...

  • Page 50: Normal Operation

    The use of the device by the end user is only per- Do not switch the appliance on/off with the power mitted after the Robur authorised TAC has com- supply switch. This may be harmful and dangerous pleted the first start-up.
  • Page 51 Normal operation lenoid valve opens and the burner ignites. After a long period of unit inactivity or at the first 3. When the flame is detected, the control box keeps the start-up, it may be necessary to repeat the ignition gas valve open.

  • Page 52: Messages On The Display

    Normal operation 6.2.7 OSWR000 Genius software for remote GEN10 BOARD MENUS AND management of gas unit heaters PARAMETERS Refer to the instructions in the relevant manual. 6.4.1 Selection keys The keys on the GEN10 board (Figure 1.14  p. 18 ) can be 6.2.8 OSWR001 Genius software for remote used to perform one of the following actions: management of gas unit heaters...

  • Page 53: Modifying Settings

    Normal operation (e.g. display "2._21" = parameter 21 in menu 2). 7. Press the key to reconfirm the value; or use 5. Press the key to scroll down the other param- keys to modify the value, and press eters in the menu; the codes will be displayed in the end to confirm or set the new value;...

  • Page 54: Efficiency

    Maintenance 6.6.2 Locked-out appliance of the Modbus controller used). Via menu 2, accessing parameter 21 (Paragraph An external intervention (reset or repair) is required due ▶ 6.4  p. 52 ) and pressing to an appliance fault. A reset may be enough for a temporary and provision- ▶...

  • Page 55: Emergency Mode

    Before resetting, it is therefore advisable to search the gas unit heater will switch off. for the reasons that led to the unit overheating. If frequent stops occur, contact Robur TAC. PERIODS OF INACTIVITY Should you foresee to leave the appliance inactive for a Figure 7.1 ...
  • Page 56 Diagnostics Code Description Warning (u) Error (E) Flame controller parameters Contact the TAC. error Room temperature probe Install the room temperature probe needed and set P45 = 1. The reset may be done following one of procedures shown in Heat exchanger temperature Paragraph 6.6.3 ...

  • Page 57: Appendices

    Seasonal space heating η 89,6 energy e ciency Contact details Robur SPA, Via Parigi 4/6, I-24040 Zingonia (BG) (*) Not required for electric warm air heaters. Figure 9.2 Table 9 Information requirements for warm air heaters Model(s): Information to identify the model(s) to which the information relates:...
  • Page 58 Seasonal space heating η 89,2 energy e ciency Contact details Robur SPA, Via Parigi 4/6, I-24040 Zingonia (BG) (*) Not required for electric warm air heaters. Figure 9.4 Table 9 Information requirements for warm air heaters Model(s): Information to identify the model(s) to which the information relates:...
  • Page 59 95,6 s, ow Seasonal space heating η 90,2 energy e ciency Robur SPA, Via Parigi 4/6, I-24040 Zingonia (BG) Contact details (*) Not required for electric warm air heaters. Figure 9.6 Table 9 Information requirements for warm air heaters Model(s): Information to identify the model(s) to which the information relates:...
  • Page 60 95,7 s, ow Seasonal space heating η 89,6 energy e ciency Robur SPA, Via Parigi 4/6, I-24040 Zingonia (BG) Contact details (*) Not required for electric warm air heaters. Figure 9.8 Table 9 Information requirements for warm air heaters Model(s): Information to identify the model(s) to which the information relates:...
  • Page 61 94,1 s, ow Seasonal space heating η 89,3 energy e ciency Robur SPA, Via Parigi 4/6, I-24040 Zingonia (BG) Contact details (*) Not required for electric warm air heaters. Figure 9.10 Table 9 Information requirements for warm air heaters Model(s): Information to identify the model(s) to which the information relates:...
  • Page 62 95,6 s, ow Seasonal space heating η 90,2 energy e ciency Robur SPA, Via Parigi 4/6, I-24040 Zingonia (BG) Contact details (*) Not required for electric warm air heaters. Figure 9.12 Table 9 Information requirements for warm air heaters Model(s): Information to identify the model(s) to which the information relates:...
  • Page 63 96,0 s, ow Seasonal space heating η 91,2 energy e ciency Robur SPA, Via Parigi 4/6, I-24040 Zingonia (BG) Contact details (*) Not required for electric warm air heaters. Figure 9.14 Table 9 Information requirements for warm air heaters Model(s): Information to identify the model(s) to which the information relates:...
  • Page 64 In standby mode 0,004 energy (GCV) η 95,4 Emission e ciency s, ow Seasonal space heating η 90,0 energy e ciency Contact details Robur SPA, Via Parigi 4/6, I-24040 Zingonia (BG) (*) Not required for electric warm air heaters.
  • Page 68 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...

This manual is also suitable for:

Next-g 30Next-g 35Next-g 45Next-g 60Next-g 90Next-g 20 ec ... Show all

Table of Contents