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Technical assistance and maintenance 

Ed. 04/2007 

 

39

 

 

5.3 MAINTENANCE 

Careful maintenance is always at the basis of economy and safety. 
Maintenance for heating units must be carried out, preferably at the beginning of winter, 

by qualified service engineers

.  

For correct, prolonged operation, general cleaning of the appliance is recommended at 
least once a year (giving particular attention to the heat exchangers and fan grilles), as 
well as combustion tests as applicable under specific regulations. 

5.4 OPERATING ANOMALIES 

 
Before checking for possible failures, ensure that: 
A)  Correct electric supply: 230-240V ±10% 50Hz and adequate earthing are provided. 
B)  The gas is supplied. 
C) Pressures and flows are within the limits recommended by the manufacturer. A 

pressure lower than the given limits will result in insufficient gas inlet. The causes for 
this may be the following: 

If the unit is fed with natural Gas: 

a)  Poor gas meter performance. 
b)  The length of the pipes and the number of elbows are excessive with respect to the 

diameter. 

If the unit is fed with L.P.G.: 

a)  It can happen that after the first time the burner turns off, the unit locks out at the 

moment of ignition. In this case it may be that the reducer flow is insufficient. 

b)  If the required pressure is not reached, it may be either that the meter does not 

provide adequate flow or the length of the pipes and the number of elbows are 
excessive with respect to the diameter. 

Only at this point proceed with the specific trouble shooting. 

WARNING 

Before opening the side door to access the control panel, CUT OUT THE 
POWER SUPPLY to the unit using the omnipolar switch. 

 

5.5  TYPES OF FAULT AND POSSIBLE ACTIONS 

In case of a failure, call a qualified service engineer. 

CASE NO. 1: THE UNIT LOCKS OUT DURING THE FIRST IGNITION 
PHASE. 

D)  The ignition electrode is broken or badly positioned. 
E)  The flame sensor is broken or incorrectly positioned or touches the unit ground. 

NOTE 

For correct burner ignition, the distance of the ignition electrode from the burner head 
should be between 4 mm and 6 mm. 

Содержание Line MC Series

Страница 1: ...Heaters Line M C Series Gas fired unit heaters with centrifugal fan for heating medium large areas Natural gas LPG fired Installation use and maintenance manual ...

Страница 2: ... A Any use of this manual other than for personal consultation must be previously authorised by Robur S p A 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 manual without prior notice ...

Страница 3: ...series heaters Section 2 is for the user It provides all the information that is necessary to use the M C series heaters correctly Section 3 is for the hydraulic installation technician It provides all the information that is necessary for the correct installation of the M C series heaters Section 4 is for the electrical system installation technician It provides all the information that is necess...

Страница 4: ...Warning Notes Start of operating procedure Reference to another part of the manual or to another manual booklet Table 1 Descriptive icons Section 1 Overview and technical characteristics Section 2 User Section 3 Hydraulic system installation technician Section 4 Electrical system installation technician Section 5 Technical assistance and maintenance Section 6 Accessories Table 2 Section icons ...

Страница 5: ...HOW TO INSTALL THE CONTROL BOX 27 4 3 HOW TO CONNECT THE THERMOSTAT TO THE HEATER 28 4 4 HOW TO MAKE THE ELECTRICAL CONNECTION FOR SUMMER OPERATION 29 4 5 ASSEMBLY WIRING DIAGRAM 30 4 6 OPERATION WIRING DIAGRAM 31 4 7 ELECTRICAL CONNECTION DIAGRAM FOR SUMMER WINTER SWITCH AND PROGRAMMABLE TIMER 31 4 8 WIRING DIAGRAM FOR CONNECTION OF SEVERAL HEATERS 32 SECTION 5 TECHNICAL ASSISTANCE AND MAINTENANC...

Страница 6: ...air heaters Installation Operation and Maintenance Manual 6 Ed 04 2007 MIXING CHAMBER 45 FILTER HOLDER 45 AIR FILTER 46 AIR FLOW ADJUSTMENT DAMPERS 46 ANTI VIBRATION JOINTS 47 LOWER SUPPORT BEAMS 47 SUPPORT BRACKETS 47 ...

Страница 7: ...ppliance Any product repairs must only be carried out by a Technical Assistance Centre authorised by the manufacturer and using only original spare parts Failure to observe the instructions above may compromise the safety of the appliance To guarantee the efficiency and correct operation of the appliance it is essential to have annual maintenance carried out by professionally qualified personnel o...

Страница 8: ...gulations Do not use gas pipes to ground electrical devices Do not leave the heater connected to the power supply unnecessarily when not in use and close the gas valve If the appliance is not to be used for a long period close the heater s main gas supply valve and disconnect it from the power supply IF YOU SMELL GAS Do not use electrical switches telephones or any other object or device that can ...

Страница 9: ...me the electronic control unit stops the appliance The combustion products pass through the heat exchangers internally the unit The heat exchangers receive externally the flow of air produced by the centrifugal fan causing warm air to circulate in the room The centrifugal fan starts automatically only when it receives the command from the ventilation thermostat that is only when the exchangers are...

Страница 10: ...gnal and reset button CONTROL AND SAFETY COMPONENTS 100 C manual reset limit thermostat to protect against overheating of the heat exchangers manual reset safety thermostat to protect against overheating of the electrical panel fan thermostat to control the start up of the fan only when the exchangers are hot to prevent cold air being blown into the room differential manostat to control the correc...

Страница 11: ...NAL EFFICIENCY 88 8 88 2 88 FUEL SUPPLY PRESSURE NATURAL GAS L P G G30 L P G G31 mbar 20 28 30 37 GAS INLET DIAMETER 1 2 3 4 COMBUSTION AIR INTAKE PIPE DIAMETER mm 130 FLUE PIPE DIAMETER mm 110 VOLTAGE 230V 50 Hz INSTALLED ELECTRICAL POWER W 600 620 920 FUSE A 6 3 10 0 AIR FLOW RATE 1 AT MAXIMUM PRESSURE DROP AT MINIMUM PRESSURE DROP m3 h 1600 2900 3100 4300 5800 7600 THERMAL HEAD AT MAXIMUM PRESS...

Страница 12: ...60 C 1270 988 800 490 1010 405 1078 431 215 284 393 95 P Q R S T U V W X Y Z M20 C 390 435 340 600 715 563 340 Ø EXT 113 Ø EXT 135 300 M30 C 460 435 340 600 715 580 374 Ø EXT 113 Ø EXT 135 324 M60 C 468 435 340 600 715 580 870 495 Ø EXT 113 Ø EXT 135 324 Table 4 Dimensions of M C series heaters Figure 1 Dimensions of M C series heaters 1 FLUE OUTLET 2 COMBUSTION AIR INTAKE 3 POWER CABLE IN FRONT V...

Страница 13: ...with current regulations Operation of the M C series heater is controlled by a thermostat available as an accessory WINTER OPERATION HEATING You will need the heater connected to the power and gas supply 1 Open the gas valve 2 Power the appliance by closing the bipolar switch 3 Set the thermostat to maximum 4 After a pre wash time of approximately 30 seconds the gas electro valve opens and the ign...

Страница 14: ... be reset manually SUMMER OPERATION VENTILATION To change from winter to summer operation fan operation only easily and immediately it is possible to substitute the control box supplied as standard with the O CTR000 command available as an accessory see Figure 17 which has a summer winter switch This command makes it possible to change from summer to winter operation by closing the gas valve by pl...

Страница 15: ...he side walls is indicated in Figure 3 on page 17 The optimum height recommended from the ground to the base of the heater is 2 5 3 5 m see Figure 3 on page 17 Installation of heaters at a height of less than 2 5 metres is not recommended To obtain maximum comfort and performance from the plant observation of the following rules is recommended make sure that the flow of air from the appliance does...

Страница 16: ...reduction station for a further reduction from 1 5 bar a 30 mbar 306 mm H2O in proximity to the heater with a tolerance from 20 mbar to 35 mbar L P G pure Propane It is essential to fit a first stage pressure reduction station in proximity to the liquid gas tank to reduce pressure to 1 5 bar and a second stage pressure reduction station for a further reduction from 1 5 bar a 30 mbar 377 mm H2O in ...

Страница 17: ...ge 19 ducts In this way the appliance is sealed off from the room in which it is installed C32 type installation expulsion of combustion products and intake of combustion air are roof based via separate or coaxial ducts see Figure 7 on page 19 In this way the appliance is sealed off from the room in which it is installed B22 type installation intake of combustion air takes place in the room and co...

Страница 18: ... Ø 110 mm O FSC001 3 Pipe clamp Ø 130 mm O STF009 1 Support bracket Figure 4 C12 type installation with separate wall mounted ducts REF CODE Q TY DESCRIPTION A O TBO011 1 Flue pipe adaptor Ø 110 mm B O TBO005 1 Ø 110 mm pipe length 1 m with intake element C O SCR000 1 Wall mounted coaxial flue pipe Ø 150 mm D O TBO012 1 Flue pipe adapter Ø 130 mm E O TBO006 1 Ø 130 mm pipe length 1 m with intake e...

Страница 19: ... REF CODE Q TY DESCRIPTION A O STF009 1 Support bracket B O TBO004 2 Ø 130 mm pipe length 0 5 m C O TBO012 1 Flue pipe adapter Ø 130 mm D O TBO011 1 Flue pipe adapter Ø 110 mm E O TBO003 1 Ø 110 mm pipe length 0 5 m F O TBO006 1 Ø 130 mm pipe length 1 m with intake element G O SCR002 1 Wall mounted coaxial flue pipe Ø 180 mm including pipe adaptors H O TBO005 1 Ø 110 mm pipe length 1 m with intake...

Страница 20: ...tallation with wall mounted flue pipe B22 TYPE INSTALLATION WITH ROOF MOUNTED FLUE PIPE REF CODE Q TY DESCRIPTION A O STF009 1 Support bracket B O TBO011 1 Flue pipe adapter Ø 110 mm C O TBO003 1 Ø 110 mm pipe length 0 5 m D O TRM000 1 Roof terminal Ø 110 E O TBO001 1 Ø 110 mm pipe length 1 m F O TBO005 1 Ø 110 mm pipe length 1 m with intake element G O RCC000 1 T connecter Ø 110 mm H O TPP000 1 P...

Страница 21: ... than the maximum pressure drop admitted by the appliance and higher than the minimum pressure drop admitted see Table 5 In the following pages an example of how to carry out the calculation of the pressure drop is provided If horizontal flue pipes over 1 metre long are installed in order to prevent the potential formation of drops of condensate reaching the appliance it is necessary to install th...

Страница 22: ...in order to prevent combustion gases coming into contact with the heated environment it is important to avoid positioning the flue pipe outlet within the clearance area indicated in Figure 12 Figure 12 Clearance area for flue pipe outlet of M C series heaters with mixing chamber mixing chamber 1 5 m 1 5 m 1 5 m CLEARANCE AREA EXTERNAL AIR INTAKE GRILLE ATTENTION DO NOT POSITION THE EXHAUST OUTLET ...

Страница 23: ...0 76 M60 C 55 013 5 16 2 27 1 66 0 73 N R DIAMETER NOT RECOMMENDED Table 6 Pressure drop air pipes and flue pipes For each 90 elbow calculate an increase in overall length of 1 5 metres For each T element calculate an increase in overall length of 2 0 metres For each 45 elbow calculate an increase in overall length of 0 75 metres AIR DIAPHRAGM FLUE DIAPHRAGM PRESSURE DROP COAXIAL DUCT Ø 100 FOR M2...

Страница 24: ...e drop 7 02 Pa The total pressure drop of the system of pipes 7 02 Pa is LOWER than the maximum admissible pressure drop 25 Pa Therefore the installation is PERMITTED If the total length of the system of pipes is over 16 metres contact Robur Pre Sales Service on 035 888111 Figure 13 Position of wall terminals 3 4 INSTALLATION OF FLUE DIAPHRAGM One or more flue diaphragms are supplied as standard w...

Страница 25: ... Intake of ventilation air can occur in one of the following ways intake of indoor air only partial or total intake of outdoor air to renew air in the room In the latter case partial or total intake of outdoor air it is necessary to use some components available as accessories for further information see ACCESSORIES and make sure that the sum of pressure drops of the components fitted see Table 8 ...

Страница 26: ...D PARTLY FROM INSIDE A SECOND DAMPER IS REQUIRED TO COMPENSATE AIR FLOW 10 Table 8 Pressure drops of aeration components 3 6 WALL INSTALLATION WITH SUPPORT BRACKET For the fitting of the Robur M C series heaters an easy to fit support bracket is supplied see ACCESSORIES on page 45 If this accessory is not used refer to Figure 16 which indicates the minimum dimensions of the bracket for standard in...

Страница 27: ... to be disconnected if the power cable is accidentally pulled thus ensuring that the appliance remains grounded The electrical safety of the appliance is achieved only when it is connected to efficient safety regulations Do not use gas pipes to ground electrical appliances 4 The heater must be connected to the power supply via a bipolar switch with a minimum contact gap of 3 mm A bipolar switch is...

Страница 28: ...able as an accessory For the installation of the ambient thermostat follow the instructions below You will need the heater installed Electrical connections must be made by professionally qualified personnel In any case before making the electrical connections make sure that the wires are not live 1 Locate the position where the ambient thermostat is to be installed if possible approximately 1 5 me...

Страница 29: ... Figure 18 on page 30 3 Power the appliance in this way only the fan s will operate providing a pleasant movement of air in the room 4 At the end of the summer season to change from summer to winter operation it is necessary to move the electrical bridge from the SUMMER position terminals 1 2 to the WINTER position terminals 1 3 Alternatively rather than performing the operations described above t...

Страница 30: ...ir heaters Installation Operation and Maintenance Manual 30 Ed 04 2007 4 5 ASSEMBLY WIRING DIAGRAM 6 7 5 1 2 0 2 3 2 4 2 1 2 2 230 V 50 Hz Figure 18 Assembly wiring diagram for M C series appliances see key to Figure 19 ...

Страница 31: ...GND 230V 50HZ M2 L1 Q2 Q1 RD M12 P1 1 2 3 4 5 6 7 13 1415 16 17 18 19 J6 JT1 J5 JT2 M4 KEY CM fan condenser Q1 gas electrovalve CS flue fan condenser Q2 soft opening modulator L1 arrest warning light for M 60 C model M fan motor RD rectifier bridge 2 motors for M 60 C model for M 60 C model M1 limit thermostat RP7 ignition electrode M10 safety thermostat RP8 detector electrode M12 manostat contol ...

Страница 32: ... ambient thermostats Figure 22 Wiring diagram for several heaters with a single programmable timer and a single ambient thermostat solution with several relays HEATER HEATER HEATER RL1 RL2 RL3 P L N L N L N Z9 Z9 Z9 TA TA TA N L I 230 V 50 Hz P PROGRAMMABLE TIMER TA AMBIENT THERMOSTATS RL1 2 3 PROGRAMMED CONTROL RELAY RL1 RL2 RL3 L N L N L N N L I TA P P PROGRAMMABLE TIMER TA AMBIENT THERMOSTATS R...

Страница 33: ...ing diagram for several heaters with a single programmable timer and a single ambient thermostat solution with a single relay HEATER HEATER HEATER P L N L N L N Z9 Z9 Z9 N L I 230 V 50 Hz P PROGRAMMABLE TIMER TA AMBIENT THERMOSTATS RL1 2 3 PROGRAMMED CONTROL RELAY TA RL ...

Страница 34: ...M C Series Warm air heaters Installation Operation and Maintenance Manual 34 Ed 04 2007 ...

Страница 35: ...lled and connected to the power and gas supply 1 Connect a pressure gauge to the pressure intake P1 see Figure 26 2 Switch on the heater 3 Remove the protective cover and turn the adjustment screw see A in Figure 24 or B in Figure 25 clockwise to increase pressure or anticlockwise to reduce it until the pressure indicated in Table 9 is reached 4 Switch the heater off and on and check that the pres...

Страница 36: ...s proceed with the regulation of soft opening see REGULATION OF SOFT OPENING FOR M 60 C HEATERS PRESSURES AT THE BURNER FOR SERIES M C APPLIANCES FUELLED BY L P G G30 G31 GAS SUPPLY PRESSURE 30 37 mbar M 20 C M 30 C M 60 C PRESSURE at the BURNER mbar mmH2O 28 5 291 28 286 27 5 281 Table 10 Pressures at the burner for M C series appliances fuelled by L P G G30 G31 Figure 24 Sit 830 Tandem Valve for...

Страница 37: ...URNER mbar mmH2O 3 9 40 14 1 143 Table 11 Pressures at the burner for soft opening on M 60 C series appliances Figure 26 Connector for measurement of gas pressure A B C D E F G G A Soft opening adjustment B Nut for regulation of pressure at the burner C Adjustment screw protection D Electrical connector SMD soft opening coil E Connector for measurement of intake gas pressure F Connector for measur...

Страница 38: ... to the one to be used the appliance must be converted and adapted to the type of gas to be used To carry out this operation proceed as follows 1 Disconnect the gas and power supply 2 Replace the nozzles with ones of a suitable diameter for the type of gas to be used see Table 12 Remember to fit the copper washers located between nozzle and manifold 3 Next proceed with regulation of the appliance ...

Страница 39: ...erformance b The length of the pipes and the number of elbows are excessive with respect to the diameter If the unit is fed with L P G a It can happen that after the first time the burner turns off the unit locks out at the moment of ignition In this case it may be that the reducer flow is insufficient b If the required pressure is not reached it may be either that the meter does not provide adequ...

Страница 40: ...reak M The flame sensor touches the unit ground or it is disconnected N The gas valve does not open due to a failure of the valve itself or of its electrical connections CASE NO 3 THE TEMPERATURE LIMIT THERMOSTAT M1 STOPS THE BURNER O The heat exchangers have overheated Check the operation of the fan gas pressure and nozzles P The exchangers overheat due to accumulation of dirt Clean the exchanger...

Страница 41: ...atic connections of the pressure switch are faulty Y The flame control unit does not start the cycle replace the internal fuse of the flame control unit or the control unit itself Z Pressure switch out of setting replace or adjust it Figure 27 Electrical panel B E C D A A Safety thermostat B Temperature limit thermostat C Air pressare switch D Flame control unit E Pressure switch control relay ...

Страница 42: ...orrect temp limit thermostat operation Is the contact open Check for correct safety thermostat operation Is the contact open Check the pressure switch for correct operation Pressure switch locked out in N A position Check installation conditions 1 Pipe length 2 Combustion air restrictor 3 Pipe clogging 4 Pressure switch silicone pipe obstructed Reset the thermostat if necessary Replace the defecti...

Страница 43: ...r The burner starts but stops soon after the end of the spark train Check the phase Is it correct Check the flame sensor Is it bent or does it touch the burner Replace the control unit Restart the control unit Locate the causes for gas supply failure Replace the gas valve Check gas supply mains Is there gas Check valve voltage Is there voltage in the gas valve The burner starts or gas is present R...

Страница 44: ...M C Series Warm air heaters Installation Operation and Maintenance Manual 44 Ed 04 2007 ...

Страница 45: ...fit on the rear part of the heater and allows it to be connected to both rear and lower air intake ducts Removable blind panels are fitted on the side to allow the centrifugal fan to be serviced CHAMBER FOR M 20 C O CSS000 CHAMBER FOR M 30 C O CSS001 CHAMBER FOR M 60 C O CSS002 FILTER HOLDER The filter holders allow the air filters to be installed The filter holders can be installed either behind ...

Страница 46: ...R FILTER 500 X 500 FOR M 30 C O FLT012 AIR FILTER 500 X 1 000 FOR M 60 C N 2 O FLT012 AIR FLOW ADJUSTMENT DAMPERS The dampers allow the adjustment of intake air in the rear or lower part The dampers can be installed either behind or below the mixing chamber The damper s must never be completely closed as this would mean an absence of air intake on the part of the centrifugal fan DAMPERS 400 X 500 ...

Страница 47: ...0 FOR M 20 C O GTV018 ANTI VIBRATION JOINT 500 X 500 FOR M 30 C O GTV019 ANTI VIBRATION JOINT 500 X 1 000 FOR M 60 C O GTV020 LOWER SUPPORT BEAMS These enable the heater mixing chamber combination to be fixed to the support bracket LOWER SUPPORT BEAMS FOR M 20 C O SPP004 LOWER SUPPORT BEAMS FOR M 30 C O SPP005 LOWER SUPPORT BEAMS FOR M 60 C O SPP006 SUPPORT BRACKETS SUPPORT BRACKETS M 20 C M 30C M...

Страница 48: ... energetico attraverso la consapevole responsabilità di tutti i collaboratori La Mission Robur Robur Spa tecnologie avanzate per la climatizzazione Via Parigi 4 6 24040 Verdellino Zingonia Bg Italy T 39 035 888111 F 39 035 884165 www robur it robur robur it Codice D LBR447 Rev A 07 MED PSS 019 05 04 2007 ...

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