Related Manuals for Junkers ZWE 24 MFA Series
Summary of Contents for Junkers ZWE 24 MFA Series
- Page 1 Machine Translated by Google Forced draft gas boiler JUNKERS EUROSTAR ZWE 24 / 28-4 MFA ...
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Page 2: Table Of Contents
Machine Translated by Google content content 6 Individual adjustment 6.1 Operating safety instructions Mechanical adjustment 6.2 Setting parameters using Explanation of symbols Bosch Heatronic system Information on the plant Declaration Gas regulation, depending on its type 1 1.1 of conformity with the EU construction model 4 7.1 Gas regulation 7.2 Transformation to another type of gas 1.2 Types overview 4... -
Page 3: Operating Safety Instructions
Machine Translated by Google Operating safety instructions Explanation of symbols Operating safety instructions The smell of gauze: The safety instructions will be marked with a warning triangle, B Turn off the gas valve (see page 16). which is gray. B The windows open. B Electric switches do not operate. -
Page 4: Information On The Plant Declaration
Machine Translated by Google Power plant information Power plant information 1.3 Delivery kit 1.1 Declaration of conformity with the EU construction model • Gas central heating for central heating This plant complies with the applicable • Clamping materials (screws with related accessories) European requirements and regulations 90/396 / EEC, 92 / 42 / EWG, 73/23 / EWG, 89/336 / EWG and of the •... -
Page 5: Accessories (See Also Price List)
• Mounting sets with mounting plate for horizontal mounting systems for vertical mounting systems of the brand Junkers (replacement of old appliances) • Mounting sets with mounting plate for horizontal mounting systems for horizontal mounting systems of the Vulcano brand (replacement of old appliances). -
Page 6: Power Plant Construction / Principle Diagram
Machine Translated by Google Power plant information 1.7 Construction of the plant / principle scheme 1.7.1 ZWE 24/28 -4 MFA ... Fig. 2 47 Heating return Nozzle pressure measuring nozzle Bosch Heatronic 48 Drain 52 Ventil magnetic 1 Heat exchanger temperature limiter 3 4 6 6.3 Temperature probe for domestic hot water 52.1 Ventil magnetic 2 53 Gas pressure regulator... -
Page 7: Electrical Connections
Machine Translated by Google Power plant information 1.8 Electrical connections Fig. 3 Ignition transformer 328 230 VAC strip 328.1 Points Heat exchanger temperature limiter 4.1 6 6.3 Temperature probe for domestic hot water 329 LSM strip 18 Circulation pump 363 Burner operation control LED 32 Ionization electrode 364 Voltage control LED 33 Ignition electrode... -
Page 8: Technical Data
Machine Translated by Google Power plant information 1.9Technical data Unit of measurement ZWE 24-4 ZWE 28-4 “23” “31” “23” gas methane gas methane (G 20) (G 31) (G 20) Rated payload max. 24,0 24,0 28,0 Rated thermal output max. the focus 26,7 26,7 31,1... -
Page 9: Requirements
Machine Translated by Google requirements 2 Prescriptions The following requirements and regulations must be observed: • Construction legislation Norm for the design and execution of natural gas supply systems I 6-98 Norm for the design and execution of electrical installations, at the consumer, with voltages up to 1000 V I 7-98 Norm for the design and execution of sanitary installations I 9-94... -
Page 10: Installing
Machine Translated by Google Installing 3 Installation 3.2 Choice of location Danger: explosion! B Before performing work on Location requirements gas components, always turn off DVGW-TRGI regulations must be observed for the power valve installations up to 50 kW, and TRF regulations must with gas. -
Page 11: Installing The Pipes 3.5 Installing
Machine Translated by Google Installing Hanging on the wall 3.4 Installation of pipes B The mounting template must be placed in the 3.4.1 Domestic hot water desired place on the wall and fixed to it. If all valves are closed, the static pressure must not B Drill holes for screws (Ø... - Page 12 Machine Translated by Google Installing B Remove the electrical connection (226.1) from B Set aside the cloak, pulling it forward. ventilator. Fig. 6 B Remove the retaining screws (226.2) and remove the fan (226). B Remove the circulation screws fan (226) and the corresponding rolling diaphragm 4 377-15.2O (1.3) is attached to the direction of absorption of the fan Fig.
- Page 13 Machine Translated by Google Installing 3.6 Checking the connections B Fit the corresponding reduction plate (1.7) to the fan (226). Water connections B Open the cold water tap and fill hot water circuit (check pressure: max. 10 bar). B Flow valves open and return the connection plate and fill the heating system.
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Page 14: Electrical Connections
Machine Translated by Google Electrical connections 4 Electrical connections Opening the control panel Danger: electric shock! B Pull the mask down and remove it. B Always switch off the voltage (fuses, LS switch) before working on the electrical components. All adjustment, control and safety components are connected and checked at the factory. -
Page 15: Connecting The Room Thermostat, Remote Control And Programming Clocks
Machine Translated by Google Electrical connections 4.2 Connecting the room B Secure the mains cable with the gland. The grounding wire must be undisturbed while the other thermostat, remote control cables have already been laid. and programming clocks Electronic regulator with external probe TA 211 E B Install according to the installation instructions of the appliance. -
Page 16: Commissioning 5.1 Before
Machine Translated by Google Putting into service 5 Commissioning Fig. 15 5.1 Before commissioning Manometer Funnel siphon 15.1 Exhaust pipe 61 Emergency key Warning: Do not operate the boiler 135 Main switch without water; otherwise the appliance 136 Thermostat for heating may be damaged! 170 Flow and return valves B Do not use the boiler without water. -
Page 17: Temperature Control 5.5 Domestic Hot Water
Machine Translated by Google Putting into service B Ventilate the radiators. 5.3 Switching on the heating B The automatic deaerator (27.1) opens and B Turn the heating circuit thermostat knob to a desired the manual deaerator on the expansion vessel (27.2), flow temperature value: which corresponds to the heating circuit and closes - low flow temperature: position E (approx. -
Page 18: (Domestic Hot Water Only)
Machine Translated by Google Putting into service 5.5 Domestic hot water temperature In the case of the room thermostat B The boiler thermostat knob rotates The domestic hot water temperature can be adjusted by to the left, to the end. button The set temperature will not be shown on the display. -
Page 19: Individual Adjustment
Machine Translated by Google Individual adjustment 6 Individual adjustment 6.1 Mechanical adjustment 6.1.2 Adjusting the flow temperature The flow temperature can be adjusted in the range of 45ÿC and approx. 6.1.1 Checking the size of the expansion vessel 90 ° C. with membrane Limiting the maximum flow temperature The following diagram makes it possible to assess, broadly speaking,... -
Page 20: Bosch Heatronic System
Machine Translated by Google Individual adjustment 6.2 Setting parameters using the Bosch 6.1.3 Changing the pump operating curve Heatronic system If several series pumps have been 6.2.1 Using the Bosch Heatronic system installed (one after the other), a hydraulic Bosch Heatronic makes it possible to adjust, program and separation between them is required. - Page 21 Machine Translated by Google Individual adjustment B Press the key on and keep it that way until the display appears - - Index page Service function The key flashes. How the pump works Stop time Maximum flow temperature Connection gap Maximum heating power 6 720 610 332-32.1O Fig.
- Page 22 Machine Translated by Google Individual adjustment 6.2.3 Changing the stop time B Turn the thermostat knobs to the values as well (service function 2.4) initials. The display shows the flow temperature again. The off time can be set from 0 to 15 minutes (factory setting: 3 minutes).
- Page 23 Machine Translated by Google Individual adjustment 6.2.5 Setting the connection deviation (ÿt) (service B Turn the thermostat knobs to the values as well function 2.6) initials. The display shows the flow temperature again. When connecting a temperature controller with an external probe, the 6.2.6 Setting the maximum heating power (service connection gap is taken over by the function 5.0)
- Page 24 Machine Translated by Google Individual adjustment B Press and hold the and keys at the same time until [] appears on the display . The working mode has been saved. 6 720 610 332-52.1O Fig. 38 B Turn the thermostat knobs to the values as well initials.
- Page 25 Machine Translated by Google Individual adjustment 6.2.7 Reading values in the Bosch Heatronic system In the case of a repair, the reinstallation of the values is considerably simplified. B Read the set values (see table 8) and enter them in the commissioning report.
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Page 26: Another Type Of Gas
Machine Translated by Google Gas adjustment, depending on its type 7 Gas adjustment, depending on its type 7.1 Gas regulation In particular, after switching to another type of gas, the gas flow must be checked or adjusted for the minimum power and the maximum maximum heating power. - Page 27 Machine Translated by Google Gas adjustment, depending on its type B Turn the thermostat knob until 2. (= maximum rated B Press the key and keep it that way until thermal output (domestic hot water)) appears on the on the display appears display).
- Page 28 Machine Translated by Google Gas adjustment, depending on its type B Press the key and keep it that way until B Turn the thermostat knob until 2. (= maximum rated on the display appears thermal output (domestic hot water)) appears on the display).
- Page 29 Machine Translated by Google Gas adjustment, depending on its type B Press the key and keep it that way until B Press the key and keep it that way until on the display appears on the display appears - - The key flashes. - - The key flashes.
- Page 30 B Remove the combustion chamber cover. B Remove the burner. B Remove the gas manifold. B Replace the nozzles (29). B Mounting is done in the opposite direction of disassembly. Service centrale Junkers NON STOP www.imoca.ro www.reparatii-centrale-termice-nonstop.ro Fig. 56 3 Nozzle pressure measuring nozzle 7...
- Page 31 Machine Translated by Google Maintenance 8 Maintenance Domestic hot water pipes Danger: electric shock! If the desired outlet temperature is no longer reached: B Always switch off the voltage B Remove the heat exchanger. (fuses, LS switch) before working on the electrical components. B Remove limescale deposits as follows: - use commercially available cleaners and an electric limestone cleaning pump.
- Page 32 Machine Translated by Google Maintenance 8.3 Emptying the heating system B Put the plug back on the measuring nozzle. B Remove the plug (234/1) from the inlet nozzle Domestic hot water circuit air required for combustion. B Close the cold water inlet valve in B Insert the probe 35 mm into the nozzle and seal the apparatus.
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Page 33: Fault Codes 9.2 Nozzle Gas
Machine Translated by Google attached 9Anexÿ 9.1 Defect codes Description Display Directions The domestic hot water temperature probe has Check the probe and the connecting cable. interruptions or short circuits. There is no electrical connection between the Check the connection cable between the module and Heatronic. - Page 34 Machine Translated by Google attached 9.2 Nozzle gas pressure setting values for ZWE 24 / 28-4 MFA. Index “23” Gas methane G20 “31” Wobbe kWh/m3 13,5 13,8 14,2 14,5 15,0 15,2 15,6 25,6 Puterea kW Gas pressure Display Gas pressure (mbar) (mbar) ( tturret = 80/60ÿC)
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Page 35: Gas Flow (L / Min)
Machine Translated by Google attached 9.3 Gas flow (l / min) “23” Gas methane G20 10,2 10,7 11,2 11,6 12,6 13,0 PC (kWh/m3) 12,1 10,3 11,0 10,7 PCI (kWh/m3) KW power Display Gas flow (l / min) 19 18 17 16 15 15 14 14 13 20 19 18 17 16 16 15 15 14 25 24 23 22 21 20 19 19 18...
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