DIDACTIC MANUAL
FAMILY:
Wall-hung boilers
GROUP:
Aqua Premium (compact with excludable water tank)
MODELS:
Nias Dual BTFS Libra Dual BTFS
CODE:
AST 14 C152/00
______________________________________________
1
st
Edition, March 2006
Page 1: ...UAL FAMILY Wall hung boilers GROUP Aqua Premium compact with excludable water tank MODELS Nias Dual BTFS Libra Dual BTFS CODE AST 14 C152 00 ______________________________________________ 1 st Edition...
Page 2: ...Gas valve SIT 845 4 2 Gas conversions 4 3 Gas valve regulation 4 4 Chimney sweep function ___________________Page 16 CHAPTER 05 HYDRAULIC GROUP 5 1 Complete hydraulic group 5 2 Secondary plate heat ex...
Page 3: ...itre water tank excludable by the user Fondital version Model with reduced depth placed inside a metal casing to be built into the external wall Output 24 28 and 32 kW LIBRA DUAL BTFS ENCASED Instanta...
Page 4: ..._________________________________________________________________ 4 AST 14 C 152 00 1 2 DIMENSIONS Nias and Libra Dual BTFS indoor ELECTRIC PROTECTION IP44 Nias and Libra Dual BTFS in wall ELECTRIC PR...
Page 5: ...HW plate heat exchanger Hydraulic group DHW plate Control board Electronic board Flow pressare switch CH pump Flow meter Safety valve DHW pump Two way valve Ignition transformer CH expansion vessel DH...
Page 6: ...time when the aqua premium turns on The system keeps the water in the tank at 10 C higher than the set DHW temperature WATER TANK TIMES 24 kW about 6 minutes and 30 seconds 28 kW about 5 minutes and...
Page 7: ..._____ 7 AST 14 C 152 00 When the water tank switch is off the DHW pump and the two way interception valve are not active in this situation the boiler operates as a standard instantaneous boiler HEATIN...
Page 8: ...s a quantity of DHW less than the quantity permitted by a flow regulator placed after the plate heat exchanger 8l min for 24kW 10l min for 28 Kw and 12l min for the model with 32 Kw output Example if...
Page 9: ...d by the plate heat exchanger of the appliance the user is in a position to make use of a significant quantity of hot water in a determined space of time until the stratified water tank has been compl...
Page 10: ...se of normal operation of the boiler or warn in the case ofmalfunctioning or shut down of the boiler INDICATION LIGHTS DURING NORMAL OPERATION OF THE BOILER 2 3 4 5 6 7 Condition Red Red Red Red Red R...
Page 11: ...N L OFF OFF Smoke ther mostat press shut down X OFF OFF ON L OFF OFF OFF OFF Flow probe malfunction X ON L OFF OFF OFF OFF OFF ON L DHW probe malfunction X ON L OFF OFF OFF OFF OFF OFF Water tankprobe...
Page 12: ...east 15 minutes have elapsed ATTENTION The anti freeze function only protects the boiler it does not protect the entire heating system To protect the heating system with the boiler in the anti freeze...
Page 13: ...trol panel Electronic safety board and integrated modulation Electronic ignition with separate transformer Flue gas pressure switch Gas valve with double shutter 3 2 OPERATING CHARACTERISTICS DHW prio...
Page 14: ...diameter mm min max Methane Gas G20 30 5 28 4 10 0 20 1 35 1 3 11 5 Butane Gas G30 30 5 28 4 10 0 29 0 80 3 5 28 5 Propane Gas G31 30 5 28 4 10 0 37 0 80 4 5 33 0 Instantaneous DHW supply t 30 C 13 li...
Page 15: ...aximum DHW working temperature C 62 62 62 Total capacity of expansion vessel L 8 10 10 Maximum recommended CH system capacity L 160 200 200 Value rel ated to 15 C 1013 mbar condition Maxi mum temperat...
Page 16: ...GAS VALVE SIT 845 MAX MIN RESISTANCE VALUES OF THE COILS EV1 880 Ohm at 220 Vac EV2 6900 Ohm at 220 Vac RESISTANCE VALUES OF THE REGULATION COIL 78 2 Ohm Gas inlet pressure check Gas outlet pressure c...
Page 17: ...c board and position the MET LPG jumper to the LPG position see the photo below Now proceed with the adjustment of the gas valve next page CONVERSION FROM LPG TO NATURAL GAS Check that the boiler is d...
Page 18: ...gas while holding still the external screw check correct operation of the burner verifying that the ignition is proper and quiet act on PACC trimmer of the electronic board when necessary in order to...
Page 19: ...THE HYDRAULIC GROUP OF NIAS LIBRA DUAL BOILER WAS DESIGNED COMPLETLEY BY FONDITAL ENGINEERS AS WITH ALL OF THE OTHER HYDRAULIC GROUPS OF OUR BOILERS DHW and CH probe parameters 10Kohm at 25 C with 343...
Page 20: ...ONDARY PLATE HEAT EXCHANGER ALFA LAVAL 24 kW 22 plates 28 kW 26 plates 32 kW 26 plates 5 3 THREE WAY VALVE 5 4 2 WAY INTERCEPTION VALVE Maximum working temperature 88 C Maximum working pressure 3 Bar...
Page 21: ...h micro water tank In position F6MAC reserved for future developments F2PIA F3RIS F4BOI F5MIC F6MAC Nias and Libra Dual boilers must have the Jumper positioned in the position F2PIA like an instantane...
Page 22: ..._______________________________________________________________________________ 22 AST 14 C 152 00 6 3 ELECTRONIC BOARD DIAGRAM Indoor only boiler Standard for ENCASED boiler Optional for INDOOR boile...
Page 23: ...r temperature and the programmed in door temperature the correction depends on the setting of the thermoregulation coefficient KT by means of the trimmer Vmin The boiler electronics recognize the pres...
Page 24: ...h the exception of B22 Discharge BTFS 24 each 90 wide radius bend equals 1 5 m in length each 90 narrow radius bend equals 3 5 m in length Discharge BTFS 28 each 90 wide radius bend equals 2 m in leng...
Page 25: ...two terminals vertically M 1500 Between two terminals horizontally N 1000 From a frontal surface without openings or terminals within a radius of 3 metres from the smoke outlet O 2000 The same but wi...
Page 26: ...y leakage gas supply pressure to boiler minimum and maximum gas pressures to boiler nozzles boiler ignition boiler combustion parameters by analysis of flue this is to be performed once every tw o yea...
Page 27: ...ce if necessar y Silicone pipes are disconnected or faulty Reconnect or repl ace silicone pipes Insufficient air intake or flue gas discharge Checkair flue gas ducts unclog or replace as needed Fan is...
