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User, Installation and Service Manual for F1 Gas Unit Heaters

 

27

Ed. 11/2006 

 

WARNING 

Only qualified service engineer authorised by Manufacturer must carry out the operation of 
servicing and maintenance. 

OPERATING FAILURES 

Before looking for possible failures, check: 

•

 

Correct power supply: 230 V ±10%, 50Hz and adequate grounding. 

•

 

Correct Gas supply 

•

 

Piping pressure losses within the limits recommended by the manufacturer. Pressure 
losses higher than limits will result in insufficient gas inlet. Causes for this may be the 
following: 

Natural Gas unit: 

a)  Poor gas meter performance. 

b)  The length of the pipes and the number of elbows are excessive with respect to the diameter. 

LPG unit: 

a)  After the first stop of the burner it can not be ignited again. It can be caused by insufficient flow 

of the pressure governor. 

b)  If the required pressure is not reached, it may be caused by insufficient gas flow directed from 

LPG tank, or the length of the pipes and the number of elbows are excessive regarding its 
diameter. 

Only at this point proceed with the specific trouble shooting. 

WARNING

 

Before opening the electric panel door, cut off the power supply to the unit by use of omnipolar 

switch. 

TYPES OF FAILURES AND SERVICING 

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

CASE N°1 

The unit locks out during the first ignition phase. 

a)  The ignition electrodes are broken or badly positioned. 

b)  The flame sensor is broken or incorrectly positioned or touches some metal part of the unit. 

c)  Failure in the flame control unit or in its electrical connections. 

d)  Failure in the gas valve or in its electrical connections. 

e)  Not efficient grounding installation 

f)  Air is inside the gas pipes. 

g)  Wrong adjustment of the gas pressure on the burner. 

 

CASE N°2 

The unit locks out during operation. 

a)  The gas supply is suddenly cut off due to a failure in the gas system. The ignition control 

repeats the ignition cycle, after which the gas valve closes locking out the unit (accidental gas 
inlet cut off). 

b)  The power supply is suddenly cut off due to a failure in the electrical supply mains. If the 

electrical cut off period is prolonged, the temperature limit thermostat (M1) locks out the unit, 

Summary of Contents for F1 21

Page 1: ...Heaters Line F1 Series Gas fired unit heaters for heating medium large areas Natural gas LPG fired Installation use and maintenance manual ...

Page 2: ......

Page 3: ...Wiring diagram page 20 Installation Wiring diagram page 21 Wiring Diagram for Multiple unit installation page 22 SECTION 4 USE AND OPERATION page 24 Start and Stop of the unit page 24 SECTION 5 MAINTENANCE AND SERVICING page 26 Removable burner page 26 Operating failures page 27 Types of failures and servicing series page 27 Case N 1 The units locks out during the first ignition phase page 27 Case...

Page 4: ...Ed 11 2006 User Installation and Service Manual for F1 Gas Unit Heaters 2 ...

Page 5: ...ers carry out annual maintenance following the manufacturer s instructions Should the unit be sold or transferred to another owner please ensure that the manual remains with the unit for use by the new owner and or installer Before turning the heater on a qualified service engineer must check that electric and gas supply ratings are the same as those given in the data plate that the exhaust duct o...

Page 6: ...irflow The fan control thermostat allows the axial flow fan to start automatically only when the heat exchangers are hot and to turn off when they are cold This prevents cool air being blown into the room If heat exchangers overheat due to malfunction the temperature limit thermostat cuts off the supply to the gas valve thus interrupts fuel flow and turns off the main burner NOTE After removing th...

Page 7: ...valve is automatically de energised with contemporary cut off the burner s gas supply Electrical supply 230 V 50 Hz Operational temperature 0 C to 60 C Model HONEYWELL VK 4125A for the Heaters F1 21 31 41 51 61 BM 762 for the Heater Model F1 81 Ignition and flame control box controls the ignition and flame of the premix burner if the is flame not detected during the safety period the flame control...

Page 8: ...al Gas LPG G30 LPG G31 mbar 20 30 37 Diameter gas inlet 3 4F Pipe Diameter air mm 80 flue mm 80 Voltage 230V 50Hz Wattage W 260 400 450 640 900 Operating temperature C 0 35 4 Fuse A 6 3 Throw residual air speed 1m s 3 m 14 16 20 22 25 29 Noise level 6 m distance in free field dB A 41 43 44 46 47 49 in tipycal installation dB A 53 55 56 57 60 63 Weight kg 55 59 68 80 90 108 Table 1 1 At 20 C 1013mb...

Page 9: ...5 340 600 720 90 3 4 80 80 355 F1 31 390 435 340 600 720 90 3 4 80 80 355 F1 41 460 435 340 600 720 90 3 4 80 80 410 F1 51 515 435 340 600 720 90 3 4 80 80 410 F1 61 398 435 340 600 720 90 3 4 432 80 80 355 F1 81 468 435 340 600 720 90 3 4 495 80 80 410 Y X T S R N U J P W Z 4 V 1 2 3 VISTA POSTERIORE F1 81 61 C Q F D B massima VISTA LATO DESTRO A G E L H VISTA FRONTALE Y X T S R N U J P Z VISTA P...

Page 10: ...the gas network is provided particularly if the unit is supplied with Natural gas G20 Be sure that the pressure of the gas network with the unit in operation is set at 20 mbar 0 29 psig 8 03 in WG allowed tolerance between 17 and 25 mbar 0 25 to 0 36 psig 6 9 to 10 0 in WG LPG Propane Butane mix G30 For the first pressure drop required in the supply it is advisable to install a pressure governor n...

Page 11: ... etc If possible DO NOT place the thermostat on walls bordering the outside to avoid false temperature readings and therefore system operation IF THE ROOM THERMOSTAT IS PROPERLY INSTALLED UNWANTED STARTING AND STOPPING OF THE SYSTEM WILL BE AVOIDED AND ADEQUATE ROOM COMFORT WILL BE ENSURED As an alternative to the room thermostat it s possible to install the programmable remote control which could...

Page 12: ...installation requires using the pipe of the larger diameter caused by the longer ducts With this typology for the calculus of the flue air inlet duct refer to the duct manufacturers data and furthermore to the flue composition flue flow and its temperature see table 2 Use only approved ducts for the installation of the units Upon request manufacturer can supply approved rigid pipes coaxial pipes a...

Page 13: ...correctly the flue exhaust and the air intake terminals follow the details given in figure 8 SLOPE 2 3 CM PER METER Figure 5 SLOPE OF THE HORIZONTAL FLUE PIPE Note When vertical pipes with length above 3 metres are installed to prevent that condense drops enter the unit on base of the vertically mounted flue pipe a T shaped piece MUST be fitted in order to collect the condense Figure 6 Figure 7 IN...

Page 14: ...2 1 0 2 0 2 0 5 0 5 1 2 F1 31 1 4 0 7 2 6 1 3 3 2 8 7 0 3 0 3 1 7 0 8 5 1 F1 41 2 0 1 0 4 2 1 8 4 9 N P 0 6 0 6 2 8 1 3 10 1 F1 51 2 3 1 6 6 5 3 5 N P N P 1 3 1 0 5 0 2 5 16 9 F1 61 3 5 2 4 9 9 5 7 N P N P 2 1 1 1 7 4 4 7 N P F1 81 9 3 4 14 8 11 0 N P N P 2 5 1 4 10 9 8 1 N P Table 3 N P INSTALLATION NOT POSSIBLE N D INSTALLATION NOT AVAILABLE TECHNICAL DATA FOR PIPES Ø 130 SUPPLIED ON REQUEST BY ...

Page 15: ...nstallation does not coincide with values indicated by table 4 for example installation type C13 with air pipe 10m length and flue pipe 16m length must be checked the total amount of the flue system pressure loss It is to be within the maximum loss allowed for the unit see example below CALCULUS EXAMPLE F41 unit with following air flue system is to be installed 8 meters of flue pipe Ø 80 2 elbows ...

Page 16: ...r D Pipe Ø 80 E Pipe Ø 80 F Coaxial Pipe TOP VIEW flue air TOP VIEW Figure 8 Figure 9 C13 INSTALLATION WITH SEPARATE WALL TERMINAL C13 INSTALLATION WITH COAXIAL WALL TERMINAL SIDE VIEW Figure 10 Figure 11 C33 INSTALLATION ROOF COAXIAL TERMINAL C53 INSTALLATION WITH ROOF FLUE TERMINAL AND WALL AIR SUPPLY PIPE ...

Page 17: ...Unit Heaters 15 Ed 11 2006 Figure 12 WALL TERMINAL POSITION Note If the total length of the flue system exceeds 8 metres it is advisable to contact the Authorised Engineer or Manufacturer 1 FLUE 2 AIR SUPPLY RECOMMENDED 2 1 ALLOWED 2 1 FORBIDDEN 2 1 ...

Page 18: ...erforming this operation cut off the electrical supply The section of every cable core to be used for this operation must be1 mm2 To install the remote control box proceed as follows Isolate the unit from power supply Fix the control box in the desired position maximum distance 20 metres from the gas unit heaters using expansion bolts Mount the supplied cable of cable with 8 x 1 mm2 section maximu...

Page 19: ...as pressure tap E after unscrewing valve setting screw Turn on the appliance Turn clockwise counterclockwise the setting screw A in order to set the required pressure value When LPG gas used turn completely the setting screw A and if the pressure needs an ulterior correction adjust the low pressure gas governor Disconnect the manometer and close the gas tap by tightening adjustment screw Two or th...

Page 20: ...LL VK 4125A VALVE BM 762 B E A C BURNER PRESSURE CHECK TAP Figure 14 CONVERSION TO ANOTHER TYPE OF GAS WARNING Qualified engineers must carry out this operation Wrong and careless assembly of the gas circuit may cause dangerous gas leakage Use adequate seals for all connections If the type of gas on the identification label does not correspond to the one that will be used the unit must be converte...

Page 21: ...ectly Tight the ring nut whit tightening torque of 62 2Nm tight the valve screws Figure 17 H Proceed then with the adjustment of the unit as described in previous chapter Burner pressure adjustment I When appliance is on check for gas leakage with soapy solution or other suitable method Check all fittings even those which were not handled during the operation J Replace the label showing the type o...

Page 22: ... for F1 21 31 41 CV fan capacitor 2 pcs for F1 61 81 S combustion blower motor V fan motor 2 pcs for F1 61 81 TR ignition transformer Z1 summer winter switch RP7 ignition electrode Z9 room thermostat RP8 flame sensor M1 temperature limit thermostat Q1 gas valve M4 flame control unit L El Supply phase L1 lockout warning lamp N El Supply neutral P1 reset button GND ground BSRB Blower Speed regulatio...

Page 23: ...s Unit Heaters 21 Ed 11 2006 INSTALLATION WIRING DIAGRAM Figure 19 INSTALLATION WIRING DIAGRAM OF F1 SERIES HEATERS SEE LEGEND FOR FIGURE 18 GREEN YELLOW WINTER BLUE SUMMER RED BROWN GREY BSRB door control board internal connection to the gas valve ...

Page 24: ...ON WITH ONE PROGRAMMER AND MORE ROOM THERMOSTATS P programmatore TA termostato ambiente RL1 2 3 relè comando programmato 230 V 50 Hz Figure 21 WIRING DIAGRAM FOR MULTIPLE HEATERS INSTALLATION WITH ONE PROGRAMMER AND ONE ROOM THERMOSTATS MULTIPLE RELAY SOLUTION P Programmer TA ambient thermostat RL 1 2 3 programming command relay P Programmer TA ambient thermostat RL 1 2 3 programming relay GND ...

Page 25: ...11 2006 P programmatore TA termostato ambiente RL relè comando programmato 50 Hz 230 V Figure 22 WIRING DIAGRAM FOR MULTIPLE HEATERS INSTALLATION WITH ONE PROGRAMMER AND ONE ROOM THERMOSTATS ONE RELAY SOLUTION P Programmer TA ambient thermostat RL programming relay GND ...

Page 26: ... 4 Press the button A summer winter in the position winter see figure 23 5 After the pre purge period about 40 seconds the gas solenoid valve opens and the ignition electrode begins to sparkle and lights the burner 6 When flame detected the flame control box is keeping the gas valve opened 7 Otherwise the flame control unit locks out the heater the gas supply to the burner is shut off and a lock o...

Page 27: ... the activation of the temperature limit thermostat Summer operation Close the gas cock and check the power supply Press the button A in the position summer and fan will start End of the season Turn off the appliance and wait the arrest of the fans Cut off the gas supply of the appliance Cut off the electrical supply if summer ventilation is not foreseen Reset of high limit temperature switch High...

Page 28: ...he burner and don t damage the deflectors inside the burner and use the pipe as a lever to pull it up and than to remove the burner 9 Clean the burner with compressed air 10 Reinsert the burner MOTE slot inside the burner must be in the upper position 11 Fix the lower screws first and than the upper ones Cross tighten the screws 12 Reinsert the diaphragm and relative gaskets 13 Fix the casing of t...

Page 29: ...arding its diameter Only at this point proceed with the specific trouble shooting WARNING Before opening the electric panel door cut off the power supply to the unit by use of omnipolar switch TYPES OF FAILURES AND SERVICING In case of a failure call a qualified service engineer CASE N 1 The unit locks out during the first ignition phase a The ignition electrodes are broken or badly positioned b T...

Page 30: ... rear panel under the black cover cap see figure 24 CASE N 4 The burner goes out and does not re ignite even if room temperature requires it a Check the performance of the room thermostat and its electrical connections b Check the position of the room thermostat check that it is not influenced by external heat sources CASE N 5 The exhaust fan will not start a Check that the room thermostat is set ...

Page 31: ...emp limit 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 Pipe clogging 3 Pressure switch tube obstructed If necessary calibrate the pressure switch Replace the defective thermostat then check fan again Replace the defective thermostat then check flue fan again Troubles...

Page 32: ...Ed 11 2006 User Installation and Service Manual for F1 Gas Unit Heaters 30 continued ...

Page 33: ...m of continuously improving the quality of our products Robur S p A reserves the right to vary above instructions and drawings without any prior notice Robur S p A Via Parigi 4 6 24040 Verdellino Zingonia BG Italy Phone 39035888111 Fax 39035884165 http www robur it e mail robur robur it ...

Page 34: ...nergy efficiency products through the commitment and caring of its employees and partners Robur Mission Robur Spa advanced heating and cooling technologies Via Parigi 4 6 24040 Verdellino Zingonia Bg Italy T 39 035 888111 F 39 035 4821334 www robur com export robur it Codice D LBR158 rev D 06 MCM PSS 044 23 11 2006 ...

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