Immergas NIKE Mini Export Manual Download

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NIKE Mini Export

Compact wall-hung instantaneous

conventional ﬂue boilers

E Mini Export

Summary of Contents for NIKE Mini Export

Page 1: ...NIKE Mini Export Compact wall hung instantaneous conventional ﬂue boilers NIKE Mini Export ...

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Page 3: ...s burner ignition central heating and d h w temperature and flame modulation The unit has a working heat output of 20 000 kcal h 23 3 kW and features a standard antifreeze safety device that ensures operation with temperatures as low as 5 C The hydraulic circuit features a copper water gas exchanger a 3 way hydraulic valve and a STAINLESS STEEL plate exchanger for the instantaneous production of d...

Page 4: ...3 Gas valve 4 System filling valve 5 Flue safety thermostat 6 Flue hood 7 Exchanger overheat safety 115 ºC 8 Expansion vessel 9 Combustion chamber 10 Automatic air vent valve 11 Circulating pump 12 D h w exchanger 13 3 bar safety valve 14 System drain valve 15 Primary heat exchanger 16 Ignition and detection electrodes 17 Burner 18 Control panel 19 Overheat safety thermostat 100 ºC ...

Page 5: ...r 8 Expansion vessel 9 Combustion chamber 10 Automatic air vent valve 11 Circulating pump 12 D h w exchanger 13 3 bar safety valve 14 System drain valve 15 Primary heat exchanger 16 Ignition and detection electrodes 17 Burner 18 Control panel CONTROL PANEL 1 Boiler thermo pressure gauge 2 Flame presence yellow indicator lamp 3 Boiler block led indicator lamp 4 0 SUMMER WINTER RESET switch 5 D h w ...

Page 6: ... Adjustment and limit NTC sensor 6 D h w exchanger 7 Burner 8 Primary heat exchanger 9 Stack safety thermostat 10 Flue hood 11 Overheat safety thermostat TS1 12 Expansion vessel 13 Automatic air vent 14 Circulating pump 15 Flow limiting device 16 System drain valve 17 3 bar safety valve 18 Overheat safety thermostat TS2 fitted until serial number 2243650 G Gas supply U Hot water outlet E Hot water...

Page 7: ...s to the water that circulates inside by means of the boiler pump 16 The hot water then directly enters the heating system through the delivery pipe M and return pipe R CIRCULATOR This operates on the primary circuit return and is physically located on the brass return manifold unit It is connected to the monobloc and primary exchanger by means of pipes with threaded fittings The casing features a...

Page 8: ...t delivery delivery by means of coupling pipes 3 featuring O R seals 5 secured by means of special forks 4 until serial number2243650 At the outlet delivery is the overheating safety thermostat at 115 ºC 2 The outlet pipe features the 100 C safety thermostat 6 and the NTC delivery sensor 7 from serial number 2243651 At the outlet delivery are the overheating safety thermostat at 105 ºC 2 and the N...

Page 9: ... bottom part of the return manifold 2 By loosening this the water of the primary circuit can be externally released 3 bar safety valve 4 Prevents safety pressure being exceeded in the circuit 3 bar It is connected in the front part of the manifold 2 to which it is fitted on the side by a socket screw Operation of this valve causes water to run out of the return pipe Automatic air vent 6 Allows aut...

Page 10: ...his stage the central heating function is disengaged and d h w production has priority DOMESTIC HOT WATER EXCHANGER This is a water water exchanger consisting of 13 stainless steel plates one over the other on the surface of which the boiler circuit water and d h w cold water run in counter current and by means of which heat exchange between the two liquids occurs It is fitted horizontally and is ...

Page 11: ...rt consists of a brass structure with inside an area where the transit supply of d h w is detected and another area where as a result deviation is made to the boiler circuit Inside are devices that carry out this function and which if necessary can be replaced using the revision kit for three way valves in which are fitted all the component parts subject to wear diaphragm rods OR shutter etc To pe...

Page 12: ...up against the plate of the perforated diaphragm 4 Upon transit of the water the pressure downstream of valve 3 is less than that upstream venturi effect With a flow of at least 1 5 l min and a dynamic water pressure of 0 3 bar the pressure difference between the two points is such as to cause movement of diaphragm 4 This permits pressing spring 1 and the release of spring 11 with the consequent m...

Page 13: ...ell VK 4105 or SIT 845 features two main coils and a third modulation coil controlled by the adjustment board The maximum and minimum outlet pressure settings can be made on this valve see gas adjustments Main electrical coils 3 Two coils of the ON OFF type energised 230V AC by the board ignition circuit when the burner has to be ignited In the case of the SIT 845 valve the two coils are electrica...

Page 14: ...ns of the adjustment board which controls the ignition electrodes 5 and detection electrode 4 Ignition electrodes 5 These is controlled by the ignition circuit of the adjustment board which produces an electrical charge that ignites the air gas mix They are positioned on the front of the burner in line with the centre ramp Detection electrode 4 This is controlled by the adjustment board and detect...

Page 15: ...le the d h w after setting the temperature switch on maximum Turn nut 4 clockwise to increase the pressure and anticlockwise to decrease the pressure 1 Modulation coil 5 Yellow protection cap 2 Coil pin 6 Gas valve outlet press point 3 Min output setscrew 7 Vale inlet press point 4 Max output setscrew 8 Air press point VALVE SIT 845 Maximum pressure adjustment Sample the d h w after setting the te...

Page 16: ...urner nozzles and in moving to the modulation board of the NATURAL GAS LPG JP1 jumper The minimum and maximum pressures are then set on the gas valve in the way described above Adjustment of the minimum and maximum output during the heating phase and of burner ignition pressure see table below can be done by means of the respective trimmers mounted on the modulation board see modulation board oper...

Page 17: ... the d h w and central heating Some of the control and safety devices operate at mains voltage and others at low voltage 230 V AC CIRCUIT SAFETY DEVICES AND CONTROLS Detection electrode E3 This detects ignition of the burner by whose flame it is invested It is connected to the ignition detection circuit of the adjustment board Fuse This interrupts power to the circuit when power input is over 2 A ...

Page 18: ... mains voltage closing a contact that acts on the ignition circuit 3 position double switch reset button Delivery sensor NM This permits to the modulation board to determine the temperature of the water supply of the primary circuit Any breakage will stop burner operation Until the serial number 2243650 it was positioned in immersion in a sump located on the three way valve body From serial number...

Page 19: ... is below that required If fitted singly connection is made to terminals 6 and 9 of connector M3 after removing the pre existing jumper P1 If fitted together with clock OP it must be connected to terminals 8 and 9 of connector M3 after removing jumper P1 Double contact switch LOADS Modulation coil MOD This is powered by the modulation board with a variable signal Permits changing the pressure of t...

Page 20: ... adjustment circuit starts the circulator MP by closing the PUMP RELAY contact If the temperature read by the NTC delivery sensor NM is below that set on the control panel by means of the heating potentiometer the board excites the REQUEST RELAY This way the board ignition circuit is enabled IGNITION SECTION which first of all triggers the ignition electrodes E1 E2 and then excites the V G RELAY W...

Page 21: ...domestic hot water microswitch SS is closed following a d h w request the adjustment circuit starts the circulator MP by means of the PUMP RELAY contact If the low voltage circuit reads by means of the NTC delkivery sensor NM that the temperature of the water is below that set on the control panel by means of the hot water potentiometer the board excites the REQUEST RELAY This way the board igniti...

Page 22: ...ably adjusted see ZEUS Mini technical sheet can be fitted to all the Mini versions NIKE EOLO ZEUS OPERATION Heating request When the main switch IG is in WINTER position and the room thermostat TA contact is closed the adjustment circuit starts the circulator MP by means of the PUMP RELAY If the temperature read by the NTC delivery sensor NM is below that set using the heating potentiometer C H th...

Page 23: ...ame by means of the ionisation electrode E3 the signal to the modulation coil is changed with reference to the difference between the delivery temperature combined with the adjustment of the d h w potentiometer and the temperature read by the delivery sensor NM When the reference temperature is reached the burner is kept operating at minimum power When the limit temperature is exceeded 85ºC the RE...

Page 24: ...This indicates the type of request under way hot water or heating Depends on position of hot water flow micro switch SS of the 3 way valve open no hot water request closed hot water request Main switch IG This is a double switch which depending on position either energises or fails to energise the low voltage circuit and indicates whether hot water or heating is enabled In RESET position this rele...

Page 25: ... subsequent ignition for the same request off 30 s on 3 min Soft ignition trimmer IGN POWER For regulating power to the modulation coil and consequently the pressure of the gas to the burner during ignition from min up to 2 3 of max set on valve Heating power trimmer C heating POWER For regulating output during the heating phase and adapting this to system requirements from min up to max set on ga...

Page 26: ...D2 red No water no circulation from serial number2243651 To prevent the water gas exchanger from overheating when the NTC heating sensor NM detects an increase in temperature of over 5 ºC per second pump stopped system cocks closed etc the burner is turned off The tripping of the safety device is indicated on the control panel by the lighting up of led LD2 red and the flashing of led LD1 yellow IN...

Page 27: ...ers the ignition circuit IGNITION ELECTRODE POWER The ignition circuit of the board powers the ignition electrodes GAS VALVE COIL POWER With the consensus of the overheating thermostats the ignition circuit powers the main coils of the gas valve and sends the slow ignition signal to the adjustment circuit BURNER IGNITION SLOW The board sends the slow ignition signal to the modulation coil FLAME DE...

Page 28: ...x operating pressure bar 3 Heating circuit max operating temperature ºC 90 Heating temperature range ºC 38 85 Total volume of expansion vessel l 6 Expansion vessel preloading bar 0 8 Generator water capacity l 3 5 Head available with 1000 l h flow rate kPa m H2O 19 6 2 Working heat output for the production of hot water kW Kcal h 23 3 20000 Domestic hot water range ºC 32 57 Flow limiting device l ...

Page 29: ...ower kcal h Heating power kW Burner gas flow rate m3 h Burner nozzle pressure mbar mm H2O Burner gas flow rate kg h Burner nozzle pressure mbar mm H2O Burner gas flow rate kg h Burner nozzle pressure mbar mm H2O 20000 23 3 2 73 11 4 116 2 04 28 3 289 2 01 36 6 374 19000 22 1 2 60 10 1 103 1 93 25 5 260 1 90 31 3 320 18000 20 9 2 46 8 9 91 1 83 22 9 234 1 81 27 3 278 17000 19 8 2 33 7 9 80 1 73 20 ...

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