Ariston ACO 32 RFFI Technical Information

Country of destination: GB/IEInstallation andServicingInstructionsType C BoilersACO 27 MFFI G.C.N: 47-116-34ACO 32 MFFI G.C.N: 47-116-

1001002003004005000 200 400 600 800 1000 1200(mbar)(l/h)RESIDUAL HEAD OF THE BOILER ∆T20°CFIG.2.62.8. WATER CONNECTIONSLegend:A= Central Heating FlowB

11The discharge pipe must be terminated in a suitable position:i) Connecting in to an internal soil stack (at least 450 mmabove the invert of the stac

WATERTREATMENTThe boiler is equipped with an aluminium alloy main heatexchanger.The detailed recommendations for water treatment are given inBS 7593:1

EE132.9. CONNECTING THE FLUEIMPORTANT!!BEFORE CONNECTING THE FLUE, ENSURE THAT 1 LITRE OFWATER HAS BEEN POURED INTO THE EXHAUST CONNECTION TOFILL THE

14WarningThe exhaust gas ducts must not be in contact with or close toinflammable material and must not pass through buildingstructures or walls made

15Fig. 2.122.9.2 FITTING THE 5” FLUE(Ø 80 / 125 HORIZONTAL/VERTICAL)Should the flue require extending, the flue connections arepush fit, however, one

16NOTE:SEEPAGE19 FOR MAXIMUM AND MINIMUM FLUE RUNS.CONTENTS:1X SILICONEO-RING(60mm)1X CONICALADAPTOR(60/100mm)1X VERTICAL FLUE KIT (80/125mm)3X SCREWS

172.9.4. FITTING THE TWIN PIPE (Ø80 / 80)NOTE:SEEPAGE19 FOR MAXIMUM AND MINIMUM FLUE RUNS.Where it is not possible to terminate the flue within thedis

18 Fig. 2.18ø 10060 mmIn the event that twin flue pipes are used, and the boilerhas a side clearance of less than 60mm from the wall, itis necessary t

19For coaxial systems, the maximum developmentvalue, mentioned in the table below also takes intoaccount an elbow.For twin flue systems the maximum de

2TABLE OF CONTENTS1. GENERAL INFORMATION1.1. GENERAL INFORMATION 31.2. TECHNICAL INFORMATION 41.3. OVERALL VIEW 62. INSTALLATION2.1. REFERENCE STANDAR

20NOTE: DRAWINGS ARE INDICATIVE OF FLUEING OPTIONS ONLY.TYPE 1TYPE 5TYPE 4TYPE 3TYPE 2Fig. 2.21FIG. 2.22C2C2C22.10. FITTING THE MECHANICAL / DIGITALCL

21FIG. 2.23FIG. 2.24FIG. 2.25FIG. 2.27FIG.2.26C3C3C3C3C4The ACO RFFI (System) boiler is not supplied with a clock,however a mechanical and digital clo

222.11. SETTING THE MECHANICAL TIME CLOCK2.11.1. SETTINGTHEDIGITALTIME CLOCKFig. 2.291. General layoutThe mechanical clock covers a 24 hour period. Ea

23Automatic Manual ContinuousOperation Operation OperationThe switching If the current You can onlytimes corres- switching mode is return to

242.12. ACCESSORY CONNECTIONIMPORTANT!!Before carrying out any repairs to the appliance alwaysensure that the external power supply has been isolated.

25FIG.2.33FITTING THE EXTERNAL SENSORThe external sensor is supplied with the interface PCB (Fig. 2.33).The external sensor should be sited no more th

262.13. ELECTRICAL DIAGRAMThe P.C.B. is fitted with 2 fuses, on the live and theneutral.The fuse holder contains:- 5 x 20mm “3.15A Slow” glass fusesPr

27Legend:A-ON/OFF buttonB-Green LED (Indicates burner on)C-COMFORT buttonD-Programming key +E-Central Heating temperature adjustmentF-Menu buttonH-Pro

282.14. WATER CIRCUIT DIAGRAMAB C DE2356789101112131415161718194120LEGEND:1- Fan2-Burner3-Ignition/detection electrode4 - Air release valve5 - Main h

29LEGEND:1- Fan2-Burner3-Ignition/detection electrode4 - Air release valve5 - Main heat exchanger6- Central heating flow temperature probe7-Condensat

3This manual is an integral and essential part of the product. Itshould be kept with the appliance so that it can be consulted bythe user and our auth

303. COMMISSIONING3.1. INITIAL PREPARATIONMTS (GB) Limited support the initiative. In Sections 11and 12 of this manual you will find th

31off and flush through cold, fill the central heating systemagain, add a flushing detergent, we highly recommend theuse of a flushing detergent appro

323.2. REMOVING THE CASINGTo remove the front casing panel, follow these steps:1. Remove the screws “A” (FIG3.1);2. Remove the four screws from case h

333.3. CONTROL PANELFIG. 3.4ADEFGHICB** IMPORTANT!!The Flue Test function will cause the boiler to run continuously onmaximum power. This function mus

34FIG. 3.4ADFGHICB** IMPORTANT!!The Flue Test function will cause the boiler to run continuously onmaximum power.This function must only be activated

353.4. INITIAL START-UP1. Make sure that:- the cap of the automatic air release valve is loosened;- the system pressure is at least 1 bar on thepressu

363.5. DISPLAY:MESSAGES SHOWN DURINGNORMAL OPERATIONDuring operation of the boiler, while it is carrying out its normaloperations, the left-hand displ

37left display right display function factory setting11from 00 to9999Soft lightas % of maximum Heating Power (NG)6600 (ACO 27 MFFI - RFFI )4433 (ACO

38FIG. 3.11Soft Light adjustment11The soft light can be adjusted between the maximum power(shown on the display as “00”, i.e.100%) and the minimumpow

39FIG.3.12Maximum Heating Power adjustment22The maximum heating power can be adjusted between themaximum power allowed by the boiler (22.5kW - ACO 27

4NameCE CertificationFlue TypeHeat Input max (Domestic Hot Water) kWHeat Input max/min (Central Heating) kWHeat Output max (Domestic Hot Water) kWHea

40Pump Speed AdjustmentPPBy pressing the and keys it is possible to adust theoperation of the pump, the two options are as follows:UU00- Si

TEMPERATURE REGULATION CONTROLLED BY THEEXTERNAL SENSORPPBy pressing the and it is possible to make the followingadjustments:“9900” Temperature reg

42Test Function ttThe test function is used to enable the engineer/installer to checkthe combustion rate (see Section 3.6.3).The P.C.B.allows the b

43The boiler is designed to monitor some operating variables andsettings by means of the display on the front control panel. Keeping,at the same time,

44SUPPLY PRESSURE (WORKING)G20 methane 20 mbarG31 propane37 mbar1 32424313.6.3 GAS REGULATION CHECKSupply pressure check1. Loosen screw “1” (Fig

45The soft light can be adjusted between the maximum power (shownon the display as "00", i.e. 100%) and minimum power (shown onthe display a

46NOTE: When there is no ignition (A01), check that the gas cock is open and gas is available.3.10 BOILER SAFETY SYSTEMSThe boiler is protected from m

47The draining of the heating system must be carried out as follows:- Turn off the boiler and the bipolar switch;- Loosen the automatic air release

484. ZONE VALVESThe boiler can be connected to a central heating system that usestwo zone valves allow connection to an indirect storage cylinder.Ther

49WIRINGDIAGRAM FORCONNECTION TO ANARISTONUNVENTED CYLINDERDIAGRAM A

5NameCE CertificationFlue TypeHeat Input max (Domestic Hot Water) kWHeat Input max/min (Central Heating) kWHeat Output max (Domestic Hot Water) kWHea

50WIRINGDIAGRAM FORCONNECTION TO ANOPEN VENTED CYLINDERDIAGRAM B

515. SEQUENCE OF OPERATIONActivation of the time clock and/or room thermostat starts the boiler.The letter C is shown in the display followed by the f

526. MAINTENANCE6.1. GENERAL REMARKSTo ensure the validity of the 5 Year Guarantee, the boiler must beserviced annually by a CORGI registered gas engi

53FIG. 7.17. SERVICING INSTRUCTIONSThe life of individual components vary and they will need servicing orreplacing as and when faults develop.The faul

541. Disconnect the electrical connector “C” (FIG. 7.5);2.Disconnect the compensation tube “D” (FIG.7.5);3. Remove the clip “E” (FIG. 7.6).4.Unscrew t

55FIG. 7.9FIG. 7.10HGII1.Disconnect the electrical connector “G” (FIG.7.9);2. Disconnect the compensation tube “H” (FIG. 7.9);3. Unscrew the two screw

567.3.5. REMOVING THEHEATEXCHANGER1. Drain the boiler;2. Remove the six nuts “L” (FIG. 7.16);3. Remove the C.H. flow and return temperature probeunscr

57FIG. 7.19FIG. 7.20FIG. 7.21FIG. 7.22FIG.7.23FIG. 7.24OPFIG. 7.18

58FIG. 7.25FIG. 7.26FIG. 7.27FIG. 7.287.3.6. REMOVING THECONDENSATETRAP(TUBE)1. Open the clamp “Q” and remove the condensate trapconnection pipe (FIG.

597.4 ACCESS TO THE GAS VALVE7.4.1. REMOVING THEGASVALVE1. Disconnect the electrical connection “V” from the gasvalve (FIG.7.31);2. Release the top nu

6LEGEND:1. Flue connector2. Mixer3.Fan4. Spark generator5. Burner6.Ignition and detection electrode7. Air release valve8.Main heat exchanger (aluminiu

607.5 ACCESS TO THE WATER CIRCUIT7.5.1. REMOVING THE D.H.W. (SECONDARY) EXCHANGER(MFFI ONLY)1. Remove the two allen screws “A1” (FIG. 7.36);2.Push the

617.5.2. REMOVING THESAFETYVALVE1.Remove the U-clip “A2” (Fig. 7.39);2. Remove the valve (Fig. 7.40).FIG. 7.40FIG. 7.397.5.3. REMOVING THEAUTOMATICAIR

627.5.6. REMOVING THE PUMP1.Unplug the electrical connection “A7” (FIG.7.48);2. Unscrew the four screws “A8” (FIG. 7.49);3. Remove the pump (FIG. 7.50

63FIG. 7.507.5.7. REMOVING THEPRESSUREGAUGE1. Release U-clip “B1” (FIG. 7.51 - 7.52);2.Ease the pressure gauge through the control panelfrom the rear;

647.5.9 REMOVING THE D.H.W. TEMPERATURE PROBE (N.T.C.)(MFFI ONLY)1. Remove the electrical connector “B5” by pulling off (Fig. 7.58);2. Unscrew and rem

65FIG. 7.607.5.10. Removing the C.H. Flow TemperatureProbe (N.T.C.)1. Unscrew the two screws “B7” (Fig. 7.60);2. Remove the electrical connection from

667.6.1. CHECKING THE FUSES1. Remove the inspection cover of the PCB box (FIG.7.64);2. Remove the fuses by pushing and rotating fuse holders“B9” (FIG.

67FIG. 7.69FIG. 7.70FIG. 7.71FIG.7.727.6.3. REMOVING THETIMECLOCK1.Open the control panel (see the paragraph “Removingthe P.C.B.s”);2. Unplug the elec

68 It is possible to detect and correct defects by using the standard fault findingdiagrams described in this chapter.NOTE:THESE CHECKS ARE NOT EXHA

69 Model 27/32 RFFI SYSTEM

7The technical information and instructions provided herein beloware intended for the installer / Servicing Technician so that theunit may be installe

70

71

729. SHORT SPARE PART LIST49151617646313731872685474883843427 30292519373638 41 4239354344454682104981039710298100993610197961177767874RESETCONFORTON/

73Keyno.G.C. partno.DescriptionARISTONPart. No.1 Flue restrictor 6510219710 Spark generator 6510217714 Main P.C.B. 6510223618 Secondary heat exchanger

74471617186261123288323814546798024 272622 36 39 4037414243443490331175747673RESETON/OFF667748454684858659 58192021822587889631 3870686771786914137611

75Keyno.G.C. partno.DescriptionARISTONPart. No.1 Flue restrictor 6510219610 Spark generator 6510217714 Main P.C.B. 6510223626 Safety valve (3bar) 6510

76To ensure that the five year guarantee applies, the following checks must be carried out once a year and the servicehistory completed in the Service

77

7811. BENCHMARK COMMISSIONING CHECKLIST

7912. SERVICE INTERVAL RECORD

82.3. OVERALL DIMENSIONSIn order to allow access to the interior of the boiler for maintenancepurposes, the boiler must be installed in compliance wit

099841832212 b - 03/2005MTS are continuously improving their products and therefore reserve the right to change specifications without prior notice an

9After removing the boiler from its packaging, remove thetemplate from the separate box containing the connection kit.NOTE: Pay particular attention t