Related Manuals for Immergas EOLO Maior kW X
Summary of Contents for Immergas EOLO Maior kW X
- Page 1 EOLO Maior kW Instantaneous wall-hung boilers with sealed-room EOLO Maior kW X Wall-hung boilers with sealed- room for central heating only or with external storage tank...
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Page 3: General Features
Technical Documentation Technical Documentation EOLO Maior 24-28-32 kW Wall-hung boiler for heating and instantaneous production of domestic hot water, with sealed chamber and forced draught EOLO Maior 24 kW EOLO Maior 28 kW EOLO Maior 32 kW General features. EOLO Maior kW is a wall-hung boiler room sealed fan assisted Combustion air flow into the sealed chamber and flue (C type) for heating and production of domestic hot water. - Page 4 EOLO Maior 28 kW X General features. EOLO Maior kW X is a wall-hung boiler room sealed fan The boiler functioning parameters are set by turning the control assisted (C type) that provides space heating only, pre-arranged panel knobs.
- Page 5 Technical Documentation Technical Documentation EOLO Maior kW main dimensions and connections. Legend: G - Gas supply AC - D.h.w. outlet AF - D.h.w. (cold) inlet R - System return M - System delivery V - Electrical connection Height (mm) Width (mm) Depth (mm) CONNECTIONS DOMESTIC...
- Page 6 Technical Documentation Technical Documentation EOLO Maior kW X Main dimensions and connections. Legend: G - Gas supply RR - System filling R - System return M - System delivery V - Electrical connection Height (mm) Width (mm) Depth (mm) CONNECTIONS...
- Page 7 Technical Documentation Technical Documentation EOLO Maior kW main components. Legend: 13 - Delivery NTC probe 1 - Gas valve 14 - Overheating Safety thermostat 2 - D.H.W. NTC probe 15 - Draught diverter 3 - D.H.W. flow switch 16 - Primary exchanger 4 - D.H.W.
- Page 8 Technical Documentation Technical Documentation EOLO Maior kW X main components. Legend: 12 - Draught diverter 1 - Gas valve 13 - Primary exchanger 2 - Burner 14 - Ignition and detection electrodes 3 - Combustion chamber 15 - System expansion vessel...
- Page 9 Technical Documentation Technical Documentation EOLO Maior kW hydraulic diagram. Legend: 15 - Circulator 1 - D.H.W. flow switch 16 - Three-way valve (motorized) 2 - D.H.W. NTC probe 17 - System draining cock 3 - D.H.W. heat exchanger 18 - System filling valve 4 - Gas valve 19 - Adjustable by-pass 5 - Burner...
- Page 10 Technical Documentation Technical Documentation EOLO Maior kW X hydraulic diagram. Legend: 12 - Circulator 1 - Gas valve 13 - System draining cock 2 - Burner 14 - Three-way valve (without motor) 3 - Primary exchanger 15 - Adjustable by-pass...
- Page 11 Technical Documentation Technical Documentation Primary circuit (boiler circuit). The primary circuit with relevant control and safety devices (16) which, when idle, lets the water flow through the d.h.w. is triggered each time there is a request for central heating exchanger (3); on the other hand, when responding to a heat- or domestic hot water.
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Page 12: Boiler Circulator
Technical Documentation Technical Documentation EOLO Maior 32 kW Flow rate Litres/h A = Head available to the system on maximum speed with the by-pass off (adjustment screw fully tightened) B = Head available to the system on maximum speed (screw tightened 1.5 turns compared to the adjustment screw completely loose) C = Head available to the system on maximum speed with the by-pass open (adjustment screw completely loose) Boiler circulator (1). - Page 13 Technical Documentation Technical Documentation Motorised 3-way diverter valve for combi mod- els. Whenever a request is made (for domestic hot water or central Circulator heating) thanks to this 3-way electric diverter valve, working on delivery the primary circuit return, boiler water is transferred either to the heating system or to the d.h.w.
- Page 14 Technical Documentation Technical Documentation Safety devices and controls for combi versions. Adjustable system by-pass (2). This device guarantees the circulation of water in the primary circuit (between delivery and return) even when it would be prevented by the high resistance of the system. It is mounted on the delivery manifold (1) and adjusted by a screw that can be accessed from the bottom of the valve sup- porting plate.
- Page 15 Technical Documentation Technical Documentation Motorized 3-way valve for "X" models heating only (optional). This electrical three-way valve operates on the primary circuit return and it allows, according to the specific request (d.h.w. Circulator delivery or heating), the water circulation in the heating circuit or in the cylinder coils (Separate storage tank of 80, 105, 120 e 200 litres).
- Page 16 Technical Documentation Technical Documentation Safety devices and controls for "X" models heating only. Adjustable system by-pass (2). This device guarantees the circulation of water in the primary circuit (between delivery and return) even when it would be prevented by the high resistance of the system. It is mounted on the delivery manifold (1) and adjusted by a screw that can be accessed from the bottom of the valve sup- porting plate.
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Page 17: Operation
Technical Documentation Technical Documentation Secondary circuit (domestic hot water circuit) for combi versions only. Operation. Running the domestic hot water causes cold water to flow Primary circuit Primary circuit through the d.h.w. flow switch (1) and, as a result, the electrical delivery return contact connected to it closes (see the electrical circuit). - Page 18 Technical Documentation Technical Documentation D.h.w. flow switch (1). When domestic hot water is drawn at a rate of 2 litres/min or less and dynamic pressure is 0.3 bar, the d.h.w. flow meter (1) enables the boiler to work in the d.h.w. mode. This takes place by means of a magnet that, upon lifting when it is hit by the flow of domestic cold water, moves closer to an electrical contact (reed relay) causing it to move due to the...
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Page 19: Gas Circuit
Technical Documentation Technical Documentation Gas circuit. This circuit consists of an atmospheric burner and a modulat- Burner. ing gas valve that permit, respectively, the combustion of gas The burner consists of horizontal Venturi pipes (6) inside which and the regulation of its flow rate. gas is injected by the same number of nozzles (7) mounted on the respective manifold (8). -
Page 20: Gas Adjustments
Technical Documentation Technical Documentation Gas adjustments. The maximum and the minimum gas pressure adjustments SIT 845 gas valve can be made on the gas valve respecting the values shown in Adjustment maximum pressure. the heat outputs table, in function of the model and the gas Run off... - Page 21 Technical Documentation Technical Documentation Flue circuit. Operation. The products of combustion, after having hit the water-gas The positive pressure point (10) is connected directly to the inside of the sealed chamber. exchanger (2), are slowed down and distributed by the plate (12) thus increasing combustion efficiency.
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Page 22: Flue Pressure Switch
Technical Documentation Technical Documentation Flue pressure switch (6). Only for 28 kW model. (Up to serial number 2712127 for EOLO Maior 28 kW) Only for 24 and 28 kW models. (Up to serial number 2711377 for EOLO Maior 28 kW X) (Up to serial number 2738489 for EOLO Maior 24 kW) The negative pressure point (9) is connected to a “Y”... - Page 23 Technical Documentation Technical Documentation When it triggers it causes a switch to close (S6) that acts on the integrated board enabling or preventing burner ignition. Flue pressure switch triggering pressures Pa (mm H Pa (mm H EOLO 24 kW 44 (4.5) 36 (3.7) EOLO 28 kW 44 (4.5)
- Page 24 Technical Documentation Technical Documentation Air inlet and exhaust systems. (see air inlet and exhaust terminal instructions). EOLO Maior kW is connected to the push-fitting air inlet/ exhaust pipes and can be installed either with a fan-assisted sealed chamber (type C) configuration or, by means of the relative kit, the fan-assisted open chamber configuration (type B Fan-assisted, open chamber configuration...
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Page 25: Air Inlet
Technical Documentation Technical Documentation Fan-assisted, sealed chamber configuration Air inlet / flue exhaust kit. The kits and their respective accessories allow to use four con- (type C). centric pipe systems and two twin pipe systems. In regards to pressure drops related to each accessory, the Exhaust. - Page 26 Technical Documentation Technical Documentation Coupling type vertical concentric kit 80 /125. 80/80 coupling type separator kit. The exhaust pipe (Ø 80 mm) is fitted inside the extraction Both pipes have a diameter of 80 mm. pipe (Ø 125 mm). Connections to the boiler are made using two special flanges Connection to the boiler is made using a flange (2) that, by for exhaust (4) from the centre pipe and extraction (3) from means of the adapter 60/100-80/125 (3) and necessary exten-...
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Page 27: Electrical Circuit
Technical Documentation Technical Documentation Electrical circuit. Zone Control Unit 230 Vac 50Hz supply RELAY BOARD E2 - Detection electrode E4 - Overheating safety thermostat NAT-LPG F1 - Line fuse F2 - Neutral fuse M1 - Circulator M20- Fan M30- Moterized 3-way diverter valve P1 - Central heating timer (optional) Primary R5 - D.h.w. -
Page 28: Low Voltage Circuit
Technical Documentation Technical Documentation Loads. It is controlled by the integrated board that produces an electric discharge between the Ignition electrodes electrodes. (E1) Upon contact the air-gas mixture ignites. It is powered by the integrated board following a d.h.w., central heating or antifreeze Boiler circulator request. - Page 29 Technical Documentation Technical Documentation It acts on the integrated board and enables boiler operation when Switching Flue pressure switch the flue are extracted correctly. If it is closed with the fan off it does not enable start of the igni- (S6) contact tion cycle.
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Page 30: Operating With The Remote Control
Technical Documentation Technical Documentation Electrical circuit. Central heating phase. ��� ������� ���� ������� ����������� ������ �� �� ����������� ������� ����������������������������� ����������������� Operating with a room thermostat. The central heating phase is enabled when the main selector Burner ignition is detected by the integrated board by way of switch (R10) is on “WINTER”. - Page 31 Technical Documentation Technical Documentation Electrical circuit. Domestic hot water phase. ��� ������� ���� ������� ����������� ������ �� �� ����������� ������� ����������������������������� ����������������� Operation. the ionisation electrode (E2). The domestic hot water phase is enabled when the main selector switch (R10) is on “SUMMER” or “WINTER”. By running off...
- Page 32 Technical Documentation Technical Documentation Integrated board. NAT-LPG FUSES D.H.W. CENTRAL MAIN SELECTOR SWITCH HEATING TRANSFORMER In the meantime, if the flue pressure switch (S6) contact is Inside the boiler’s panel there is an integrated microprocessor idle, “NC”, the adjustment circuit powers the fan (M20) by controlled board that controls the appliance’s electrical devices means of relay K4.
- Page 33 Technical Documentation Technical Documentation D.h.w. request for instant boilers. ture set with the d.h.w. potentiometer, the relays are energised again to start a new ignition cycle. After the d.h.w. flow meter (S4) has closed, burner ignition If, during operation, the heating delivery probe (B1) measures proceeds in exactly the same way as it does for the heating a temperature higher than 90°C, the K2 relay contact opens, mode.
- Page 34 Technical Documentation Technical Documentation Inputs. Zone control unit (CZ) It sends signals to the board concerning operating requests of zone valves or connected (external optional) external pumps (see zone control unit operation). Remote control It sends signals to the board of the SUMMER/WINTER selector switch concerning d.h.w. and central heating temperature adjustment and the central heating request (times, room (CAR) (optional) (see CAR operation)
- Page 35 Technical Documentation Technical Documentation Outputs. 230 Vac = coils Gas valve power supply It is a 230 V ac signal indicating that the main gas valve coils are energised (Y1) energised (Y1). 0 Vac = coils not energised Ignition electrodes It is a high voltage signal (higher than 16 kV) that determines an electrical discharge at the (E1) ends of the ignition electrodes located on the burner.
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Page 36: Safety Devices
Technical Documentation Technical Documentation Safety devices. The circulator (M1) and the 3-way diverter valve (M30) are turned on for 30 seconds after: Circulator / 3-way diverter valve antilock - 24 hours of inactivity with the main selector switch on SUMMER. - 3 hours of inactivity with the main selector switch on WINTER. - Page 37 Technical Documentation Technical Documentation To prevent the water-gas exchanger from overheating, at the end of each central heating, an- Post-circulation pump tifreeze or “chimneysweep” request, the circulator (M1) keeps working for 150 seconds. Sealed chamber post-ven- After the burner has been switched off at the end of any type of request, the combustion tilation chamber is washed and the fan is kept running for 30 seconds.
- Page 38 Technical Documentation Technical Documentation Indications and alarms. The EOLO Maior kW boiler signals malfunctions with the * from December 2005 flashing of one of the LEDs, from 5 to 11, coupled to the (alternate) flashing of LED 1. Operating indications Remote display Boiler powered but no flame LED 1 on...
- Page 39 Technical Documentation Technical Documentation Programming the integrated board. The EOLO Maior kW boiler is designed for programming For the association of the LED to the value, see the following some operating parameters if wanted. tables: By modifying these parameters the boiler can be adapted to meet one’s specific requirements.
- Page 40 Technical Documentation Technical Documentation Permanent timing reduction. The boiler is fitted with an Central heating ignitions delayed due to Room thermostat electronic timer that prevents the burner igniting too frequently or Remote control requests. The boiler is set to turn on im- in the central heating phase.
- Page 41 Technical Documentation Technical Documentation D.h.w. exchanger preheating. When this function is active Relay 3 operation*. it is possible to maintain the d.h.w. exchanger at a constant Relay 3 operation LED flashing temperature of 50 °C in order to have a quicker supply of (single, free contacts) (slow) domestic hot water.
- Page 42 Technical Documentation Technical Documentation EOLO Maior kW operating sequence. Central heating phase Domestic hot water phase Power on Power on Main selector switch on WINTER Main selector switch on SUMMER or WINTER Ú Ú Integrated board operation enabled Integrated board operation enabled Closing of the main selector switch contacts (WINTER position) Closing of the main selector switch contacts (SUMMER position) enables operation in the central heating phase...
- Page 43 Technical Documentation Technical Documentation Technical data. EOLO Maior 24 kW technical data. Nominal heat input kW (kcal/h) 25,9 (22241) Minimum heat output kW (kcal/h) 10,7 (9195) Nominal heat output (working) kW (kcal/h) 24,0 (20640) Minimum heat output (working) kW (kcal/h) 9,3 (8000) Working heat performance at nominal output 92,8...
- Page 44 Technical Documentation Technical Documentation EOLO Maior 28 kW technical data. Nominal heat input kW (kcal/h) 30,1 (25920) Minimum heat output kW (kcal/h) 12,2 (10488) Nominal heat output (working) kW (kcal/h) 28,0 (24080) Minimum heat output (working) kW (kcal/h) 10,5 (9030) Working heat performance at nominal output 92,9 Working heat performance at 30% load of nominal output...
- Page 45 Technical Documentation Technical Documentation EOLO Maior 32 kW technical data. Nominal heat input kW (kcal/h) 34,4 (29579) Minimum heat output kW (kcal/h) 12,5 (10750) Nominal heat output (working) kW (kcal/h) 32,00 (27520) Minimum heat output (working) kW (kcal/h) 10,5 (9030) Working heat performance at nominal output 93,0 Working heat performance at 30% load of nominal output...
- Page 46 Technical Documentation Technical Documentation EOLO Maior 28 kW X technical data. Nominal heat input kW (kcal/h) 30,1 (25923) Minimum heat output kW (kcal/h) 12,2 (10488) Nominal heat output (working) kW (kcal/h) 28,0 (24080) Minimum heat output (working) kW (kcal/h) 10,5 (9030) Working heat performance at nominal output 92,9 Working heat performance at 30% load of nominal output...
- Page 47 Technical Documentation Technical Documentation EOLO Maior 24 kW variable heat output. NATURAL GAS (G20) BUTANE (G30) PROPANE (G31) NOZZLE NOZZLE NOZZLE HEAT HEAT FLOWRATE PRESSURE FLOWRATE PRESSURE FLOWRATE PRESSURE OUTPUT OUTPUT BURNER BURNER BURNER BURNER BURNER BURNER (kW) (kcal/h) (mbar) (kg/h) (mbar) (kg/h)
- Page 48 Technical Documentation Technical Documentation EOLO Maior 32 kW variable heat output. NATURAL GAS (G20) BUTANE (G30) PROPANE (G31) NOZZLE NOZZLE NOZZLE HEAT HEAT FLOWRATE PRESSURE FLOWRATE PRESSURE FLOWRATE PRESSURE OUTPUT OUTPUT BURNER BURNER BURNER BURNER BURNER BURNER (kW) (kcal/h) (mbar) (kg/h) (mbar) (kg/h)