Related Manuals for Immergas NIKE Mini 24 Export
Summary of Contents for Immergas NIKE Mini 24 Export
- Page 1 NIKE Mini 24-28 Export Compact instantaneous wall-hung conventional flue boilers NIKE Mini 24 S Export Compact wall-hung conventional flue boilers for central heating only...
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Page 3: General Features
Technical Documentation Technical Documentation NIKE MINI 24-28 Export Compact instantaneous wall-hung conventional flue boiler (type B). NIKE Mini 24 NIKE Mini 28 General features. NIKE Mini is a wall-hung conventional flue boiler for heating and producing domestic hot water and is distinguished by its compact size. - Page 4 Technical Documentation Technical Documentation NIKE Mini 24 S Export Compact, wall-hung conventional flue boiler for central heating only (type B). NIKE Mini 24 S General features. NIKE Mini S is a wall-hung conventional flue boiler for central heating only with an output power of 23.6 kW (20,296 kcal/h) which, using an optional kit comprising a 3-way electric valve and a domestic hot water probe together with the necessary wiring (that can be connected directly to the integrated board),...
- Page 5 Technical Documentation Technical Documentation NIKE Mini 24 main dimensions and connections. Height (mm) Width (mm) Depth (mm) Connections DOMESTIC SYSTEM WATER 3/4” 1/2” 1/2” 3/4” 3/4” Legend: G - Gas supply AC - Domestic hot water outlet AF - Cold water inlet R - System return M - System delivery V - Electrical connection...
- Page 6 Technical Documentation Technical Documentation NIKE Mini 24 S main dimensions and connections. Height (mm) Width (mm) Depth (mm) Connections WATER SYSTEM 3/4” 1/2” 3/4” 3/4” Legend: G - Gas supply RR - System filling R - System return M - System delivery V - Electrical connection STNM ed 07/07 NIKE Mini Export...
- Page 7 Technical Documentation Technical Documentation NIKE Mini 24 main components. Legend: 1 - Burner 14 - Automatic by-pass 2 - D.h.w. flow switch 15 - Motorised 3-way valve 3 - Gas valve 16 - Draining valve 4 - Filling valve 17 - Primary exchanger 5 - Boiler pressure gauge 18 - Ignition and detection electrodes 6 - Flue safety thermostat...
- Page 8 Technical Documentation Technical Documentation NIKE Mini 28 main components. Legend: 1 - Burner 14 - Automatic by-pass 2 - D.h.w. flow switch 15 - Motorised 3-way valve 3 - Gas valve 16 - Draining valve 4 - Filling valve 17 - Primary exchanger 5 - Boiler pressure gauge 18 - Ignition and detection electrodes 6 - Flue safety thermostat...
- Page 9 Technical Documentation Technical Documentation NIKE Mini 24 S main components. Legend: 1 - Burner 13 - 3-bar safety valve 3 - Gas valve 14 - Automatic by-pass 4 - Filling valve 16 - Draining valve 5 - Boiler pressure gauge 17 - Primary exchanger 6 - Flue safety thermostat 18 - Ignition and detection electrodes...
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Page 10: Control Panel
Technical Documentation Technical Documentation Control panel. Legend: 1 - Reset push button 9 - Visual display of temperatures and error codes 2 - Stand-by /summer/winter push button 10 - Unit of measure 3 - (+) push button to increase d.h.w. temperature 11 - Central heating functioning mode 4 - (-)push button to reduce d.h.w. - Page 11 Technical Documentation Technical Documentation NIKE Mini 24 S hydraulic circuit (central heating only). Legend: 1 - 3-bar safety valve 2 - Filling valve 3 - Gas valve 4 - Burner 5 - Primary exchanger 6 - Draught diverter 7 - Flue safety thermostat 8 - Delivery probe 9 - Overheating safety thermostat 10 - System expansion vessel...
- Page 12 Technical Documentation Technical Documentation NIKE Mini Hydraulic circuit. Legend: 1 - D.h.w. flow switch 2 - Flow limiter 3 - Filling valve 4 - Gas valve 5 - Burner 6 - Primary exchanger 7 - Draught diverter 8 - Flue safety thermostat 9 - Delivery probe 10 - Overheating safety thermostat 11 - System expansion vessel...
- Page 13 Technical Documentation Technical Documentation Head flow rate graph. The course of the curve that represents the flow rate/head ratio available for the system depends on how fast the circulator is working which, depending on the position, gives the system a bigger or smaller head. The characteristic curves are shown in the following graphs.
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Page 14: Boiler Circulator
Technical Documentation Technical Documentation Boiler circulator (1). Primary exchanger (1). The pump works on the primary circuit return; it is part of the It is a lamellar water-gas exchanger with copper tubes and pump body unit made in a composite material. fins and at whose outlet (delivery) the central heating NTC The automatic air vent (2) is housed directly on the body. - Page 15 Technical Documentation Technical Documentation Motorised 3-way diverter valve for combi mod- els. It is an electric motor (1) connected to the 3-way unit (2) and locked by a fork that allows, according to the request made Exchanger Exchanger (d.h.w. or central heating), boiler water to flow into the central delivery return heating system or in the d.h.w.
- Page 16 Technical Documentation Technical Documentation Safety devices and checks for combi models. Automatic system by-pass (3). This device guarantees the circulation of water in the central heating circuit even when it would be prevented by the high resistance of the system. It works between the central heating delivery and return, inserted inside the by-pass fitting (4) that connects the pump unit (2) to the 3-way unit.
- Page 17 Technical Documentation Technical Documentation Safety devices and checks for S models (central heating only). Automatic system by-pass (3). This device guarantees the circulation of water in the central heating circuit even when it would be prevented by the high resistance of the system. It works between the central heating delivery and return, inserted inside the by-pass fitting (4) that connects the pump unit (2) to the delivery manifold.
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Page 18: Operation
Technical Documentation Technical Documentation Secondary circuit (domestic hot water circuit) for combi versions only. Operation. When domestic hot water is drawn cold water flows inside the d.h.w. flow switch (1) which closes the electrical contact coupled to it (see the electrical circuit). As a result, the integrated board starts the d.h.w. - Page 19 Technical Documentation Technical Documentation D.h.w. flow switch (2). Whenever domestic hot water is drawn at a rate of at least 1.5 l/min and a dynamic pressure of 0.3 bar, the flow switch (2) enables the boiler to work in the d.h.w. mode. This is done by means of a magnet that, lifting when hit by the flow of domestic cold water, moves near to an electrical contact (reed relay) causing it to move thanks to the magnetic effect.
- Page 20 Technical Documentation Technical Documentation Gas circuit. The circuit consists of an atmospheric burner and a modu- In Honeywell VK 4105 valve, they are connected in series and lating gas valve for gas combustion and flow rate regulation powered by electric main tension rectified by a diode bridge respectively.
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Page 21: Gas Settings
Technical Documentation Technical Documentation Gas settings. Maximum and minimum pressure settings are done by means Gas valve SIT 845. of the gas valve, observing the values given in the tables rela- Setting maximum pressure (NIKE Mini). tive to each boiler for the corresponding gas type (see technical Draw some domestic hot water after having set its temperature data). -
Page 22: Converting The Gas Type
Technical Documentation Technical Documentation Gas valve Honeywell VK 4105. Converting the gas type. There are special kits for adapting to a type of gas different Setting maximum pressure (NIKE Mini). Draw some domestic hot water after having set its temperature from the standard one the boilers are intended for (natural (using the keys on the panel) on maximum. -
Page 23: Electrical Circuit
Technical Documentation Technical Documentation Electrical circuit. ������ ������� ����� - Line fuse - Neutral fuse JP1 - Boiler type selector M1 - Circulator M30 - 3-way valve (motorised) - Functioning push button - Block reset push button - D.h.w. flow switch S20 - Room thermostat (optional) S21 - D.h.w. -
Page 24: Low Voltage Circuit
Technical Documentation Technical Documentation Loads. Ignition electrode It is controlled by the integrated board that produces an electrical charge between its end (E1) and the burner surface, igniting the air-gas mixture when they come into contact. It is powered by the integrated board when there’s a d.h.w., central heating or antifreeze Boiler circulator request. - Page 25 Technical Documentation Technical Documentation The possible functioning selections are: = Circuit powered, the antifreeze and antiblock functions Functioning button are still active, the post-circulation function is completed. Push Button (S2) = Boiler operation in SUMMER. = Boiler operation in WINTER. It lets the integrated board measure the temperature of the primary circuit delivery water.
- Page 26 Technical Documentation Technical Documentation Electrical circuit. Central heating phase. ��� ������� ���� ������� � ���������������������������� �������������� (*) depending on the gas valve used, the main coils are powered Burner ignition is detected by the integrated board by means at mains voltage (SIT 845) or at mains voltage rectified by a of the ionisation electrode (E2).
- Page 27 Technical Documentation Technical Documentation Electrical circuit. D.h.w. phase. ��� ������� ���� ������� � ���������������������������� �������������� Burner ignition is detected by the integrated board by means (*) depending on the gas valve used, the main coils are powered of the ionisation electrode (E2). at mains voltage (SIT 845) or at mains voltage rectified by a diode bridge (U1) housed in the valve connector (Honeywell VK4105).
- Page 28 Technical Documentation Technical Documentation Modulation board. �������� �� �� ��� �� �� �� �� �� ��� ��� �� ����� Inside the boiler’s control panel is a p.c.b. that controls the and fumes thermostat (E6) and if the temperature measured appliance’s electrical devices and sees to the linear modulation by the delivery probe (B1) is below the value set on the boiler’s of burner power.
- Page 29 Technical Documentation Technical Documentation D.h.w. request. When some domestic hot water is drawn it causes the contact of the d.h.w. flow switch (S4) to close and enables operation in the d.h.w. mode. Burner ignition then occurs as it does for the central heating phase.
- Page 30 Technical Documentation Technical Documentation Inputs. Remote digital control It sends the signals to the board relating to the functioning mode (Stand-by/Summer/ Winter), temperature adjustments (d.h.w. and central heating) and central heating requests (CRD) (optional) (times, room temperature, etc.). It indicates an ongoing d.h.w. request. D.h.w.
- Page 31 Technical Documentation Technical Documentation Outputs. 230 Vac = coils energised Powering the gas valve It is a 230 V ac signal indicating that the gas valve’s main coils (Y1) are energised. (Y1) 0 Vac = coils not energised It is a high voltage signal (higher than 16 kV) that determines an electrical discharge at the Ignition electrode (E1) end of the ignition electrode located on the burner.
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Page 32: Safety Devices
Technical Documentation Technical Documentation Safety devices. The circulator (M1) and 3-way valve (M30) are turned on for 30 seconds after: Circulator antiblock device / - 24 hours of inactivity with the boiler in the SUMMER ( ) mode. 3-way valve - 3 hours of inactivity with the boiler in the WINTER ( )mode. -
Page 33: Operating Indicators
Technical Documentation Technical Documentation Digital user interface. The appliance is adjusted and controlled (burner ignition, by means of a digital interface featuring a display and push temperature setting, flame modulation and diagnostics), by a buttons. p.c.b. that can be used to display and set operating parameters Operating indicators. - Page 34 Technical Documentation Technical Documentation Operating malfunctions indicated. In the event of a failure or malfunction, the illumination of the NIKE Mini 24-28-24 S display panel changes colour, going from green to orange if the problem can be rearmed electrically or from green to red if the problem can be rearmed manually.
- Page 35 Technical Documentation Technical Documentation Up to April 2007 - modify the corresponding value with push buttons (5) and (6), consulting the following tables; Central heating power. The NIKE Mini 24-28-24 S boilers are - confirm the value set by pressing the Reset push button (1) equpped with electronic modulation that adapts boiler power for about 5 seconds;...
- Page 36 Technical Documentation Technical Documentation Waiting time. The boiler has an electronic timer that prevents too frequent burner ignitions in the central heating mode. The boiler has its own standard timer set at 3 minutes. Central heating ignitions timer Range of settable values Parameter from 1 to 10 3 = 3 minutes (Standard setting)
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Page 37: Central Heating Mode
Technical Documentation Technical Documentation NIKE Mini 24-28 operating sequence. Central Heating mode Domestic Hot Water mode Power on Power one Boiler functioning knob on Winter Boiler functioning knob on Summer or Winter Ú Ú Enabling integrated board operation Enabling integrated board operation The functioning knob (Winter position) enables boiler The functioning knob (Summer or Winter position) enables operation in the central heating mode... -
Page 38: Technical Data
Technical Documentation Technical Documentation Technical data. NIKE Mini 24 technical data. Nominal heat input kW (kcal/h) 26.2 (22551) Minimum heat input kW (kcal/h) 10.8 (9324) Nominal heat output (useful) kW (kcal/h) 23.6 (20296) Minimum heat output (useful) kW (kcal/h) 9.3 (8000) Efficiency at 100% 90.0 Efficiency at 30% of load... - Page 39 Technical Documentation Technical Documentation NIKE Mini 28 technical data. Nominal heat input kW (kcal/h) 30.6 (26286) Minimum heat input kW (kcal/h) 12.0 (10321) Nominal heat output (useful) kW (kcal/h) 27.6 (23736) Minimum heat output (useful) kW (kcal/h) 10.5 (9000) Efficiency at 100% 90.3 Efficiency at 30% of load 89.1...
- Page 40 Technical Documentation Technical Documentation NIKE Mini 24 S technical data. Nominal heat input kW (kcal/h) 26.2 (22551) Minimum heat input kW (kcal/h) 10.8 (9324) Nominal heat output (useful) kW (kcal/h) 23.6 (20296) Minimum heat output (useful) kW (kcal/h) 9.3 (8000) Efficiency at 100% 90.0 Efficiency at 30% of load...
- Page 41 Technical Documentation Technical Documentation NIKE Mini 24 - 24 S variable heat output. (Up to April 2007) METHANE (G20) BUTANE (G30) PROPANE (G31) INJECTOR INJECTOR INJECTOR HEAT HEAT FLOWRATE PRESSURE FLOWRATE PRESSURE FLOWRATE PRESSURE OUTPUT OUTPUT BURNER BURNER BURNER BURNER BURNER BURNER (kW)
- Page 42 Technical Documentation Technical Documentation NIKE Mini 28 variable heat output. (Up to April 2007) METHANE (G20) BUTANE (G30) PROPANE (G31) INJECTOR INJECTOR INJECTOR HEAT HEAT FLOWRATE PRESSURE FLOWRATE PRESSURE FLOWRATE PRESSURE OUTPUT OUTPUT BURNER BURNER BURNER BURNER BURNER BURNER (kW) (kcal/h) (mbar) (mm H...