Mamiya C24, C32, C28 manual Servicing Primary Heat Exchanger Replacement, Recuperator Replacement

Page 47

SERVICING

67PRIMARY HEAT EXCHANGER REPLACEMENT

1Disconnect the electrical supply.

2Remove outer and inner casing as explained in frame 42.

3Close off the isolating cocks of the CH circuit at the bottom of the boiler.

4Release system pressure by opening the main circuit drainage cock. Do not release CH pressure using the pressure relief valve. It may cause debris within the system to foul the valve.

5Remove the combustion chamber panel A by unscrewing the screws B and removing the fan holder bracket C.

6Remove the screws D and the plate E.

7Loosen the connection F and slightly move the pipe G upwards.

8Remove the clip H and the safety thermostat I. It is not necessary to disconnect it from the wiring.

9Completely unscrew the connection J and move the pipe K downwards freeing it from the heat exchanger connection.

10Remove the clip L.

11Move the pipe M upwards freeing it from the connection and rotate towards right.

12Remove the heat exchanger by sliding it forwards.

13Re---assemble in reverse order.

Fit the clip H with the arrow pointing upwards as illustrated in the drawing.

Do not force the connection F when tighting it.

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SERVICING

68 RECUPERATOR REPLACEMENT

K

1Disconnect the electrical supply.

2Remove outer and inner casing as explained in frame 42.

3Close off the isolating cocks of the CH circuit at the bottom of the boiler.

4Release system pressure by opening the main circuit drainage cock.

Do not release CH pressure using the pressure relief valve. It may cause debris within the system to foul the valve.

5Remove the fan A (see frame 58) and the air pressure switch B (see frame 60).

6Remove the flue temperature probe C (see frame 53)

7Completely loosen the connection D and slightly move the pipe E upwards.

8Remove the clip F and move the pipe G downwards freeing it from the connection, then turn it towards right.

9Using pliers, remove the spring H moving it downwards and disconnect the rubber pipe I.

10Remove the bracket J by unscrewing the screws that hold it on the frame.

11Rotate the recuperator K as indicated by the arrow and remove it towards the front of the boiler.

12Remove the clip L and the pipe E.

13Reassemble the recuperator carrying out the removal operations in reverse order.

After reassembling ensure that the fan---exchanger and exchanger---elbow gaskets are correctly mounted and ensure a good sealing.

C

J

B

 

A

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G

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D

mini HE --- Installation & Servicing

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Contents Installation and servicing Mini HE --- Installation & Servicing Document Amendments Domestic Hot Water GeneralBoiler Data Performance Data --- Central HeatingBenchmark Commissioning Checklist Details ContentsBoiler Clearances General Boiler Water ConnectionSafe Handling GAS SafetyIntroduction Optional Extra KitsLocation of Boiler and Flue Outlet Flue Installation RequirementsGAS Supply Safe Handling of SubstancesAdditional Pumps Water Circulation SystemWater Treatment AIR SupplyRequirements Electrical SupplyHydraulic Loss Remaining pump capacity Mini HE C24, mini HE C28Size of expansion vessel Domestic HOT Water Requirements General Boiler Control InterlocksGeneral Boiler Water Circuit Diagram Installation Boiler Assembly InstallationPack B contents Installation UnpackingPack a contents Hardware pack contentsFitting the Flue System InstallationFlue Duct Rear Flue AssemblyRefer to the following diagram for the model mini HE C32 Twin PipeWall Mounting Template rear flue Fitting the Extension Kits Installation Cutting the FlueRing Roof Flue KIT CONTENTS/OPTIONS Installation Fitting the Optional Roof FlueFlue Arrangement Installation Flue Terminal PositionFlue over 3 meters long Assembling the Roof Flue KITConnections Installation Fitting the Wall Mounting PlateFit the service valves, washers and tail pipes as shown Mounting the BoilerFlues over 1 meter long Safety Valve DrainCondensate Drain Locate the gasket and flue turret on the top of the boilerElectrical Connections For external controls wiring see frameIncoming mains wiring detail Pictorial Wiring Control pcb Installation Functional Flow DiagramElectrical Connections for a Combi Boiler External Electrical ControlsInstallation Initial Lighting Minimum valve setting To Adjust PressuresMaximum valve setting Gas Installation Anti Cycling SettingCommissioning and Testing Electrical InstallationGeneral Checks Handing Over Installation GAS ConversionServicing Schedule ServicingServicing Removal of Outer and Inner Casing Burner Pressure Check Servicing Burner Removal and CleaningCleaning the Heat Exchanger RE---ASSEMBLYRemove the fan by sliding it towards left see the arrow Servicing FAN and Venturi Removal and CleaningWhen replacing any component Spark and Detection Electrode ReplacementBurner Replacement Burner Injectors ReplacementRemoval of CH temperature probe Servicing Overheat Thermostat ReplacementFlue Temperature Probe Replacement Temperature Probe ReplacementExpansion Vessel Replacement GAS Valve ReplacementAIR Pressure Switch Replacement Servicing FAN ReplacementVenturi Replacement Pump Replacement Complete Servicing Electronic CONTROL/IGNITION PCB Replacement Boiler mode setting CH Flow Switch Membrane Replacement Servicing CH Flow Switch ReplacementFlow limiter Servicing DHW Flow Switch ReplacementDHW Filter and Flow Limiter Replacement Recuperator Replacement Servicing Primary Heat Exchanger ReplacementDiverter Valve Internal Parts Replacement Servicing Diverter Valve Actuator ReplacementCH Drain Cock Replacement Servicing DHW Heat Exchanger ReplacementTo replace the condensate trap Condensate Trap ReplacementTo clean the condensate trap and drain OFF Normal operationFinding Fault FindingFrom Fault finding Fault Finding Fault Refer back to page 52 of fault finding to continue Fault Finding From 173984 Burner mod. mini HE C28, mini HE C32075535 Fan mod. mini HE C28, mini HE C3222 23 Installer Notification Guidelines GAS Boiler Commissioning Checklist Service Interval Record Ideal boilers Technical TrainingCorrectly Ignition at attempt Installer the contact fire not doesInstaller Water hot or GAS of Escape MaintenanceCleaning Clearances Minimum Lights DiagnosticBoiler the Light to

C28, C24, C32 specifications

The Mamiya C series is celebrated among photography enthusiasts for its unique twin-lens reflex (TLR) design, offering both a classic aesthetic and innovative features that set it apart in the world of medium format cameras. The C32, C24, and C28 models represent a range of technology and design advancements that cater to various shooting needs.

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In summary, the Mamiya C32, C24, and C28 each present unique features and technological advancements that cater to various types of photographers. Whether it's the precision of the C32, the compact convenience of the C24, or the versatile performance of the C28, these cameras maintain a special place in the hearts of medium format enthusiasts, showcasing the blend of craftsmanship and innovation that Mamiya is known for.
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