Immergas MAIOR EOLO 4 E Series Technical Documentation Manual
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Immergas MAIOR EOLO 4 E Series Technical Documentation Manual

Immergas MAIOR EOLO 4 E Series Technical Documentation Manual

Instantaneous wall-hung boilers, sealed-room with "aqua celeris" system
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MAIOR EOLO 4 E
Instantaneous wall-hung
boilers, sealed-room
with "Aqua Celeris" system

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Summary of Contents for Immergas MAIOR EOLO 4 E Series

  • Page 1 MAIOR EOLO 4 E Instantaneous wall-hung boilers, sealed-room with "Aqua Celeris" system...
  • Page 3 Technical Documentation Technical Documentation MAIOR EOLO 24-28-32 4 E Wall-mounted boiler with fan-assisted sealed combustion chamber for central heating and instantaneous domestic hot water production, equipped with AQUA CELERIS system MAIOR EOLO 24 4 E MAIOR EOLO 28 4 E MAIOR EOLO 32 4 E General features MAIOR EOLO 4 E is a wall-mounted, sealed chamber,...
  • Page 4 Technical Documentation Technical Documentation Main MAIOR EOLO measurements and connections Key: Height Width Depth V - Electrical connection (mm) (mm) (mm) G - Gas supply AC - Domestic hot water outlet CONNECTIONS ACV - Solar valve kit DHW inlet DOMESTIC (Optional) SYSTEM AF - Domestic cold water inlet...
  • Page 5 Technical Documentation Technical Documentation MAIOR EOLO controls panel Key: 1 - Heating temperature selector 10 - Blocked boiler, it needs to be 17 - Domestic hot water temperature set 2 - Domestic hot water temperature unblocked by pressing the “RESET” 18 - Boiler connected toV2 remote selector button...
  • Page 6 Technical Documentation Technical Documentation Main MAIOR EOLO parts Key: 15 - Primary heat exchanger 1 - Sample points (air A) - ( ue gases F) 16 - Ignition and detection electrode 2 - Sealed chamber 17 - System expansion vessel 3 - Fan 18 - Aqua Celeris 4 - Combustion chamber...
  • Page 7 Technical Documentation Technical Documentation MAIOR EOLO hydraulic diagram Key: 1 - Domestic hot water ow switch 16 - Safety thermostat 2 - System lling valve 17 - Air vent valve 3 - Flow limiter 18 - Boiler pump 4 - Domestic hot water probe 19 - System draining valve 5 - Aqua Celeris Resistance 20 - System pressure switch...
  • Page 8 Technical Documentation Technical Documentation Primary circuit (boiler circuit). e primary circuit, with relative control and safety devices, is depends on the position of the 3-way motorised valve (22), starts up every time there is a central heating or domestic which allows ow towards the domestic water heat exchanger hot water request.
  • Page 9 Technical Documentation Technical Documentation MAIOR EOLO 32 Flow rate Litres/h A = Head available to the system at maximum speed with by-pass excluded. B = Head available to the system at maximum speed with by-pass inserted. C = Head available to the system at second speed with by-pass excluded. D = Head available to the system at second speed with by-pass inserted.
  • Page 10 Technical Documentation Technical Documentation Boiler pump (1) Primary Exchanger (1) Operates on the primary circuit return. It is part of the pump is is a lamellar water-gas heat exchanger with bronze pipes body unit made with composite material. and ns that have the central heating ow NTC probe (6) ere is a seat built into the body where the automatic air and the overheating safety thermostat (2) positioned on their vent valve (2) is housed with O-ring sealing.
  • Page 11 Technical Documentation Technical Documentation Motorised 3-way valve is is composed of an electric motor (1) connected to the three-way group (2) with a clip. Flow Return Based on the request (DHW or CH), the three-way clip allows heat exchanger heat exchanger boiler water to enter the heating system or in the DHW (plate) heat exchanger.
  • Page 12 Technical Documentation Technical Documentation Safety devices and controls Adjustable system by-pass (5) is guarantees circulation in the CH circuit even when the high resistance of the system does not allow it. It operates between the ow and return of the CH circuit. It is push- tted into the top of the pump group (3) and is locked with a clip.
  • Page 13 Technical Documentation Technical Documentation Multipurpose Hydraulic Group ICHS By-pass cartridge replacement Before replacing the various components found on the ICHS To replace the by-pass cartridge (5) you need to pull out the unit, the water present inside the primary circuit must be drained by unscrewing the system draining tting.
  • Page 14 Technical Documentation Technical Documentation Secondary circuit (domestic hot water circuit) How it operates Use of the DHW leads to cold water passing through the ow switch (1) and the consequent closure of the electric contact that is coupled to it (see electric circuit). After this, the integrated P.C.B.
  • Page 15 Technical Documentation Technical Documentation Aqua Celeris device (4) is is a tank (that contains water from the primary circuit) with a capacity of 2 litres, insulated with styrofoam and is designed speci cally to reduce DHW supply times. In the lower part there are two threaded 3/4"G ttings with a gasket seal (inlet and outlet of the primary circuit), where the ow and return of the primary circuit occur.
  • Page 16 Technical Documentation Technical Documentation Hydraulic connection to the Aqua Celeris device e hydraulic group (4) makes the hot ow water coming from the primary heat exchanger ow through the plate heat exchanger rst (3). At the outlet of the plate heat exchanger, by owing through the pipe (2), the water collects inside the aqua Celeris tank (1), and is then drawn out by the boiler pump (1) which is connected to the Aqua Celeris tank with a pipe (6)
  • Page 17 Technical Documentation Technical Documentation DHW ow switch (1) With respect to drawing DHW with a ow rate of at least 1.5 l/min and a dynamic pressure of 0.3 bar, the ow switch (1) enables the boiler functioning in DHW mode. is takes place by means of a magnet which, lifting when it is hit by the ow of domestic cold water, approaches an electric contact (reed relay) and causes shifting due to the...
  • Page 18 Technical Documentation Technical Documentation Gas circuit e circuit is composed of an atmospheric burner and a modulating gas valve, which respectively allow the combustion of the gas and the adjustment of its ow rate. How it operates e electric power supply of the main coils (3) causes the opening of both internal shutters of the valve, thus allowing Modulation the passage of gas towards the burner.
  • Page 19 Technical Documentation Technical Documentation Burner Required height: e burner is composed of horizontal venturi pipes (5) where H min = 2.5 mm gas is injected by the same number of nozzles (6) mounted on H max = 4 mm the speci c manifold (7). e number of nozzles, whose diameter varies according to the type of gas being used (see technical data), there are11 for versione 24, 13 for version 28 and 15 for version 32.
  • Page 20 Technical Documentation Technical Documentation Gas adjustments The minimum and maximum pressure adjustments are SIT 845 Gas Valve performed by acting on the gas valve and must be carried Maximum pressure adjustment out respecting the values stated in the tables relative to each Draw DHW after having positioned the temperature dial on generator for the corresponding type of gas (see technical data).
  • Page 21 Technical Documentation Technical Documentation Flue circuit How it operates Flue pressure switch (4) e combustion products, after having reached the water-gas It is positioned in the upper inside part of the sealed chamber heat exchanger (1), are slowed down and distributed by the and detects,through the relevant points, the pressure di erence plate (12), with the consequential increase in combustion yield between the inside of the fan (negative signal) and the inside...
  • Page 22 Technical Documentation Technical Documentation Flue pressure switch intervention pressures Pa (mm H Pa (mm H MAIOR EOLO 24 52 (5.3) 42 (4.3) MAIOR EOLO 28 52 (5.3) 42 (4.3) MAIOR EOLO 32 52 (5.3) 42 (4.3) Fan (3) e extractor operates downstream from the combustion chamber and is physically "attached"...
  • Page 23 Technical Documentation Technical Documentation Intake and exhaust systems (see intake and exhaust terminals instructions) e MAIOR EOLO boiler is prepared for connection to the appropriate snap- t intake/exhaust pipes and can be installed inside the home or outside the home (in a partially protected place) in the following con gurations: Outdoor (in a partially protected place): - with an open chamber and fan-assisted circulation with...
  • Page 24 Technical Documentation Technical Documentation Con guration with sealed chamber and fan- Intake and Exhaust Kit The kits with relative accessories allow the use of four assisted circulation (type C) concentric systems and two divided systems. Regarding head losses relative to all accessories, the various Exhaust possible combinations and position of the flue shutter e connection to the ue exhaust pipes takes place using a...
  • Page 25 Technical Documentation Technical Documentation Ø 80/125 push- tting vertical concentric kit Ø 80/80 push- tting separator kit e exhaust pipe (Ø 80 mm) is inserted inside the exhaust e pipes both have a diameter of 80 mm. pipe (Ø 125 mm). Connections to the boiler take place using the two appropriate Connection to the boiler takes place with a ange (2) which, anges that allow exhaust (4) from the central tting and intake...
  • Page 26 Technical Documentation Technical Documentation Electric circuit ZONES CONTROL UNIT (Optional) Power supply 230 VAC Blue 50 Hz Brown ANTIFREEZE (optional) N B : T H E U S E R INTERFACE IS ON THE WELDING SIDE OF THE BOILER P.C.B. Key: A9 - P.C.B.
  • Page 27 Technical Documentation Technical Documentation How it operates VOLTAGE HIGH VOLTAGE NB. Recti er U1 is i n c l u d e d o n l y w i t h boilers equipped with V.G. Honeywell Black Brown LOGIC-CONTROLS MICROPROCESSOR Signal Microprocessor programming...
  • Page 28 Technical Documentation Technical Documentation Central heating anti-freeze request Following this the burner comes down to the minimum set value ("Minimum CH output" parameter), to then reach, if When the temperature detected by the CH ow probe (B1) necessary, the maximum set value ("Maximum CH output" falls below 4°C, the P.C.B.
  • Page 29 Technical Documentation Technical Documentation Aqua Celeris Function e function is enabled or disabled by pressing the "Boost" button and is indicated on the display screen with its symbol. ), only on instantaneous boilers (parameter S3 "Type of boiler" set at "0") and by enebaling the additional relay switch with PTC "Aqua Celeris"...
  • Page 30 Technical Documentation Technical Documentation 230 V AC high voltage circuit Inputs e P.C.B. power supply is connected to the L and N clamps of the X4 connector. 230 V / 50 Hz - 230 V AC +10% / -15% - 50 Hz +/- 5% Detects the ignition of the burner by which the ame is hit and Ignition and detection allows the integrated P.C.B.
  • Page 31 Technical Documentation Technical Documentation Low voltage circuit Inputs Domestic hot water ow Following the use of DHW, the closure of the contact acts on the Contact in switch integrated P.C.B. causing it to operate in DHW mode. cut-o (S4) In stand-by it enables functioning in CH mode. On/Stand-by/O Button It sends the P.C.B.
  • Page 32 It allows the connection of electronic devices, e.g. zones control unit or DIM (optional) Management and control devices IMG BUS connection It allows the connection of electronic devices, e.g. Immergas zones digital control unit. (optional) Allows long distance control of the generator (SUM/WIN switch, Comando Amico Remoto temperature adjustment and indication, alarms display, reset, etc.) and...
  • Page 33 Technical Documentation Technical Documentation P.C.B. safety functions In the case of: elevated resistance of the safety thermostat contact (contact is not perfectly Generic boiler P.C.B. closed or it is worn); anomlay on the gas valve pilot circuit; no electric connection to the gas anomaly valve (interrupted gas valve coils);...
  • Page 34 Technical Documentation Technical Documentation Sealed chamber post- e combustion chamber is washed after switch-o of the burner at the end of any request ventilation and the fan works for 30 seconds. Flow NTC breakage e breakage of the central heating ow probe (B1) is signalled by the relative anomaly and (B1) prevents functioning both in the central heating and domestic hot water modes.
  • Page 35 Technical Documentation Technical Documentation Operating mode Key: 1 - Heating temperature selector 9 - Operation in winter mode 15 - Chimney sweep function in progress 2 - Domestic hot water temperature 10 - Blocked boiler, it needs to be 16 - DHW production phase function selector unblocked by pressing the “RESET”...
  • Page 36 Technical Documentation Technical Documentation Information Menu Pressing the button (4) for 4 seconds, the “Information To exit the menu, press the button (4) again for 4 menu” is activated, which allows to display some boiler seconds or wait for 120 seconds. functioning parameters.
  • Page 37 Technical Documentation Technical Documentation Menu "P" Range Parameter Parameter Description Default (ref. 21) (ref. 17) Establishes the switch-o method in DHW mode. 0 Correlated: the boiler switches o on the basis of the temperature set. 0 - 1 thermostat 1 Fixed: the switch-o temperature is xed on the maximum value independently from the value set on the control panel.
  • Page 38 Technical Documentation Technical Documentation Menu "t" Range Parameter Parameter Description Default (ref. 21) (ref. 17) Central heating e boiler has electronic timing, which prevents the burner from igniting too 0 - 600 ignitions timer often in central heating mode. seconds Central heating In the ignition phase, the boiler performs an ignition ramp in order to arrive at 6 - 840...

  • Page 39: Table Of Contents

    Technical Documentation Technical Documentation Fault and anomaly signals To eliminate the block (where necessary), press the RESET e MAIOR EOLO boiler will signal any anomaly with the ashing symbol (14) along with the relative ashing error code button (5) positioned on the boiler panel. (21) as per the table below: Anomaly signalled Error code display...
  • Page 40 Technical Documentation Technical Documentation Technical Data MAIOR EOLO 24 MAIOR EOLO 28 MAIOR EOLO 32 Nominal heat input kW (kcal/h) 25.8 (22194) 29.7 (25536) 34.2 (29433) DHW minimum heat input kW (kcal/h) 8.1 (6968) 9.9 (8480) 12.2 (10524) CH minimum heat input kW (kcal/h) 10.6 (9094) 12.7 (10902)
  • Page 41 Technical Documentation Technical Documentation Combustion parameters G230 MAIOR EOLO 24 Gas nozzle diameter 1,35 0,79 0,79 1,40 Supply pressure mbar (mm H 20 (204) 29 (296) 37 (377) 20 (204) Flue ow rate at nominal heat output kg/h Flue ow rate at min heat output kg/h at Nom Q./Min.
  • Page 42 Technical Documentation Technical Documentation Variable thermal output MAIOR EOLO 24 METHANE (G20) BUTANE (G30) PROPANE (G31) PROPANE AIR (G230) BURNER BURNER BURNER BURNER HEAT HEAT PRESS. NOZZLES PRESS. NOZZLES PRESS. NOZZLES PRESS. NOZZLES GAS FLOW GAS FLOW GAS FLOW GAS FLOW OUTPUT OUTPUT PRESSURE...
  • Page 43 Technical Documentation Technical Documentation Variable thermal output MAIOR EOLO 32 METHANE (G20) BUTANE (G30) PROPANE (G31) PROPANE AIR (G230) BURNER BURNER BURNER BURNER HEAT HEAT PRESS. NOZZLES PRESS. NOZZLES PRESS. NOZZLES PRESS. NOZZLES GAS FLOW GAS FLOW GAS FLOW GAS FLOW OUTPUT OUTPUT PRESSURE...
  • Page 44 Technical Documentation Technical Documentation List of accessories and optionals Comando Amico Remoto V2 remote control (CAR Comando Amico Remoto Universal remote control code 3.021395 code 3.020946 External Probe Antifreeze kit (up to -15°C) code 3.014083 code 3.021474 Additional system expansion vessel kit (2 litres) Polyphosphate dispenser kit code 3.018433 code 3.016305...
  • Page 45 Technical Documentation Technical Documentation Troubleshooting Before every intervention: Check that the gas, water and electricity are correctly connected Before maintenance interventions or replacement of to the boiler, according to that indicated in the data plate and components, remove the electric power supply upstream from the instruction manual.
  • Page 46 Technical Documentation Technical Documentation e error 01 appears on the display See error section 01 - b (wait for the P.C.B. to make 2 ignition cycles). e burner ignites. e error 04 appears on the display See error section 04. (wait for the P.C.B.

  • Page 47: No Ignition Block

    Technical Documentation Technical Documentation Error codes ERROR 01 No ignition block e ignition transformer discharges. Replace the P.C.B. e wiring between the ignition electrode and P.C.B. is OK. Restore/replace the ignition electrode and relative wiring. Check the correct position and correct distance of the ignition electrode and replace it if necessary. 230 V DC are present on clamps 1-2 of connector X7.

  • Page 48: Fan Anomaly

    Technical Documentation Technical Documentation ERROR 03 Fan anomaly 220 VDC are present on terminals 1-2 of connector X1 on the P.C.B. No Replace the P.C.B. 230 V DC are present on the fan terminals. Restore the electric connection/replace the wiring. Replace the fan.

  • Page 49: Con Guration Error

    Remote Control is connected correctly. Check the connection between P.C.B. (clamps 41-44) and remote control N.B.: only remote controls supplied by Immergas can be used (CAR (IN+ and IN-) carried out respecting the polarity and using a dedicated line to prevent interference.

  • Page 50: Low Power Supply Voltage

    Technical Documentation Technical Documentation ERROR 37 Low power supply voltage e boiler power supply voltage exceeds 190 VDC. Restore the correct electric power of the appliance (230 VDC ±10%). e electric power supply connection wires and relative external Restore the electric connection/replace the cables/external fuses. fuses are integral.
  • Page 51 Technical Documentation Technical Documentation Sections 230 VDC are present on the L-N terminals of the P.C.B. Check the electric power supply upstream from the boiler and restore it. e P.C.B. fuse is integral. See section E Replace the P.C.B. 230 VDC are present on terminals 3-4 of connector X1 on the P.C.B. No Replace the P.C.B.
  • Page 52 Technical Documentation Technical Documentation On the DHW system, check the correct opening of any cocks, cleanliness e ow ( ow rate) of the DHW is at least 1.5 l/min. of the pipes, lters, ow rate limiters etc. e ow switch functions correctly. Check/clean/replace the ow switch.

This manual is also suitable for:

Maior eolo 24 4 eMaior eolo 28 4 eMaior eolo 32 4 e

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