Subscribe to Our Youtube Channel
Related Manuals for Robur M20
Summary of Contents for Robur M20
- Page 1 Installation, use and maintenance manual 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
INDEX OF CONTENTS Introduction 3 Heating engineer ................p. 4 ............p. 18 Recipients ..............p. 4 Warnings ..............p. 18 Control device ............p. 4 Fuel gas supply ............ p. 18 Combustion products exhaust ...... p. 19 II Symbols and definitions ......... p. 4 Air ducting ............p. 22 Key to symbols ............ -
Page 4: Iintroduction
Appliance / Unit = equivalent terms, both used to refer to DANGER the gas unit heater. TAC = Technical Assistance Centre authorised by Robur. External request = generic control device (e.g. thermo- WARNING stat, timer or any other system) equipped with a volt- age-free NO contact and used as control to start/stop the unit. - Page 5 Warnings appliance. equipment. Gas component tightness Air flow „ Before performing any operation on gas ducting Do not obstruct the fan intake or the warm air components, close the gas valve. outlet. „ Upon completing any procedure, perform the Distance from combustible or flammable mate- tightness test according to regulations in force.
-
Page 6: Iii.2 Conformity
Warnings This Installation, use and maintenance manual Environmental protection and combustion products ▶ must always accompany the appliance and must exhaust. be handed to the new owner or installer in the Fire safety and prevention. ▶ event of sale or removal. Any other applicable law, standard and regulation. -
Page 7: Features And Technical Data
Cylindrical stainless steel combustion chamber. It has been designed to be installed inside the room to be ▶ Robur patented heat exchangers, made out of a spe- heated. ▶ cial aluminium die-cast alloy, with horizontal finning The combustion circuit is room sealed and meets the re-... -
Page 8: Dimensions
Figure 1.1 M series generators size Flue gas exhaust Combustion air inlet Power supply cables input Gas connection B max M20, M25, M30, M35, M36, M40 M50, M60 Figure 1.2 M C series generators size Flue gas exhaust Combustion air inlet Power supply cables input... -
Page 9: Electrical Wiring Diagram
Features and technical data Table 1.1 Dimensions M20 C M30 C M35 /M36 M60 C 1070 1270 1270 1010 1010 1080 1078 1/2” 1/2” 1/2” 1/2” 1/2” 1/2” 3/4” 3/4” 3/4” 3/4” ELECTRICAL WIRING DIAGRAM Figure 1.3 Operating wiring diagram 1 2 3 4 5 6 7... - Page 10 Features and technical data Figure 1.4 Wiring plan for mounting the M20/M25/M30/M35/M36/M40 devices (see legend Figure 1.3 p. 9 ) Blue Black Winter Brown Summer...
-
Page 11: Controls
Features and technical data Figure 1.5 Mounting electrical diagram for M50/M60 units (see legend Figure 1.3 p. 9 ) Blue Black Winter Brown Summer CONTROLS 1. 1 button basic control OCDS012 (supplied) 2. OCTR000 2-key basic control 1.4.1 Control device 3. OTRG005 thermoregulator 4. - Page 12 Features and technical data 1.4.4 OTRG005 thermoregulator of gas unit heaters (in association with OTRG005 thermoregulator) 6. External request Figure 1.8 OTRG005 thermoregulator 1.4.2 OCDS012 1-key basic control Figure 1.6 OCDS012 1-key basic control The thermoregulator is a device that can directly manage gas unit heaters: the simple and intuitive display interface allows the user to change the control parameters, manage the power on/off and change the operating mode (heat-...
- Page 13 For further details and diagrams see the instruction sheet with voltage-free NO contact. of the digital chronothermostat OCDS008. For managing the request signal (Z9 contact), Robur pro- 1.4.6 OSWR000 Genius software for remote vides as optional different models of thermostats and management of gas unit heaters chronothermostats.
-
Page 14: Electrical Panel
Features and technical data ELECTRICAL PANEL Figure 1.10 Electrical panel Internal components protection thermostat Controller for ignition, adjustment and flame control Limit thermostat Pressure switch control relay Differential pressure switch TECHNICAL DATA Table 1.2 Technical data Axial fan models Heating mode nominal (1013 mbar - 15 °C) Heat input 20,6 28,8... -
Page 15: Transport And Positioning
(2) Values measured in an open area; in a real installation, the thermal flow may reach greater distances than those given here (depending on the height of the ceiling and its thermal insulation). Centrifugal fan models M20 C M30 C M60 C... -
Page 16: Handling
Transport and positioning Packing installed must be load-bearing or, in any case, suit- able for supporting its weight. „ Only remove the packing after placing the appli- ance on site. „ Do not leave parts of the packing within the reach Installation must not be made on walls with poor of children (plastic, polystyrene, nails...) since they strength that do not guarantee adequate resist-... -
Page 17: Support Bracket
M35/M36 1010 SUPPORT BRACKET Table 2.2 Support bracket dimensions for centrifugal gas unit Robur provides easy mounting support brackets as an heaters optional, suitably designed for M series gas unit heaters, which allow simplifying the wall fixing. M20 C M30 C... -
Page 18: Heating Engineer
± 15%. 3.2.1 Gas connection Non compliant gas pressure (Table 3.1 p. 18 ) may damage the appliance and be hazardous. 1/2" M (models M20, M25, M30, M35, M36, M40) ▶ Table 3.1 Network gas pressure Gas supply pressure [mbar] Product Countries of destination G25.1... -
Page 19: Combustion Products Exhaust
Upon request, If necessary, insulate the piping. ▶ Robur can supply rigid pipes, coaxial ducts and ter- 3.2.6 LPG pressure reducers minals, all of approved type. With LPG the following must be installed:... - Page 20 The pressure drops of the flue and air pipes available as Robur optional are shown in Table 3.3 p. 21 . The pressure drops of the coaxial pipes available as Robur View from above optional are shown in Table 3.3 p. 21 .
- Page 21 Heating engineer Table 3.2 Permissible pressure drop depending on model and mounted diaphragm Air diaphragm Fumes diaphragm Admissible pressure drop (Pa) Height (mm) Code Height (mm) Code maximum Minimum M20, M20 C ----- ----- ----- ----- ----- ----- ----- ----- ----- -----...
-
Page 22: Air Ducting
Refer to the Paragraph 2.4.2.1 p. 17 for the dimensions metres, it is advisable to contact the technical ser- of the flange connection. vice Robur by telephone. In order to avoid vibrations (possible source of noise and mechanical failures), it is advisable to 3.3.6 Installing the flue diaphragm... -
Page 23: Electrical Installer
Electrical installer Minimum pressure drop on heat flow delivery smooth sheet metal duct. The insulation of the duct must be assessed, in order to In order to grant that the centrifugal fan operates avoid heat losses. within the operating limits in any situation, it is For the dimensioning of the air duct, consider the data mandatory to ensure a minimum pressure drop on of air flow and available head of the fan, summarized in... -
Page 24: Control System
Electrical installer Figure 4.1 Appliance connection to the mains power supply Figure 4.2 1-key basic control connection 230 V ~ 50 Hz L1 Lockout lamp N GND P1 Reset button OCDS012 4.4.2 External request Depending on the required operation, it is required to arrange: CONTROL SYSTEM Request device (e.g. - Page 25 Electrical installer Figure 4.3 Connection of external request for gas unit heater Figure 4.4 Summer/winter switch connection start/stop management Summer/winter switch 4.4.2.3 Control of multiple gas unit heaters with a External request (e.g. thermostat, timer, switch, ...) single external request Through a suitable connection to the terminals described 4.4.2.2 Summer/winter mode management above, it is possible to manage the specific function on more than one gas unit heater using a single external...
- Page 26 Electrical installer Figure 4.5 Multiple appliances wiring diagram with one programmable timer and more room thermostats FUSE FUSE FUSE 4.4.3 Positioning the control system sources (lamps, hot air flow from the unit itself, etc.). If possible, do not place the control system on walls Install the chosen thermostat/control system according to ▶...
-
Page 27: First Start-Up
▶ bustion parameters and may exclusively be carried Non-compliant flue gas exhaust. ▶ out by a Robur TAC. NEITHER the user NOR the in- All situations that may involve operation abnormali- ▶ stallation technician is authorised to perform such ties or are potentially hazardous. - Page 28 3. Turn the pressure regulator (A) clockwise to increase the pressure or counterclockwise to decrease it until the value indicated in the 5.1 p. 28 table is reached. Figure 5.2 Gas valve Pressure intake 5.2.1 M20/M25/M30/M35/M36/M40 Figure 5.2 p. 28 Pressure regulator Slow opening adjustment Inlet pressure intake Outlet pressure intake 1.
-
Page 29: Gas Changeover
M gas unit heater models, depending on ed in the 5.1 p. 28 Table; use a screwdriver for the the gas type. operation. Table 5.2 Nozzle data M20 C M30 C M60 C Installation data number of nozzles... -
Page 30: Normal Operation
3. After the purge time (around 40 seconds), the gas so- First start-up may exclusively be carried out by a lenoid valve opens and the burner ignites. Robur TAC (Chapter 5 p. 27 ). 4. When the flame is detected, the control box keeps the gas valve open. -
Page 31: Maintenance
Maintenance to the unit. Figure 6.2 2-keys basic control 2. Using a suitable summer/winter selector switch (Paragraph 4.4.2.2 p. 25 ), select summer mode (con- tact 1-3 open, contact 1-2 closed). This way the fan on- ly will start. 3. To stop the fan press again the selector switch on win- ter position (contact 1-2 open). -
Page 32: Scheduled Routine Maintenance
If If the gas unit heater does not start in heating mode nor frequent stops occur, contact Robur TAC. in ventilation, follow the steps below to identify the most likely cause of the fault: 1. - Page 33 Maintenance (procedure Paragraph 7.3 p. 32 ). „ If gas is present, check for voltage at the gas valve „ Check the extractor fan for voltage. If the voltage is during scintillation. If voltage is present and the present but the extractor fan does not start, replace extractor fan is running, check that the nozzle is the condenser of the extractor fan.
- Page 34 Maintenance Figure 7.1 The heater does not Main switch start neither for heating nor for ventilation Check the fuse. Is Consult your Replace the it burnt-out? installer fuse Open the gas supply. Check for Electric supply Phase reaches Exchange the live Main switch correct electric is 230-240 V -...
- Page 35 Maintenance Figure 7.2 continued Does the flue fan Replace the anti-welding stop and go? device of pressure switch Replace the Replace the ignition electrode fuse Check the ignition electrode and Does the electrode start related cable. Is the electrode Is the control unit Replace the sparking in the burner properly positioned and does the...
- Page 36 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...
Need help?
Do you have a question about the M20 and is the answer not in the manual?
Questions and answers