Mamiya C32, C28, C24 Servicing Overheat Thermostat Replacement, Flue Temperature Probe Replacement

Page 39

SERVICING

52OVERHEAT THERMOSTAT REPLACEMENT

1Remove outer and inner casing (refer to frame 42).

2 Remove the screws A and the plate B.

B

A

3Disconnect the wiring C .

4Remove the spring D which holds the overheat thermostat on the pipe of the primary heat exchanger and remove it.

C

D

5Re---assemble in reverse order.

6Apply an adequate quantity of heat conducting compound between the pipe and the thermostat.

SERVICING

53FLUE TEMPERATURE PROBE REPLACEMENT

1Remove outer and inner casing (refer to frame 42).

2Disconnect the wires from the flue temperature probe.

3Unscrew the steel temperature probe adaptor A (complete with the temperature probe) from the recuperator.

4Ensure the probe is positioned as shown with the metal sheath end level with the brass fixing nut B.

BA

5Ensure that on the probe, the length C that enters the recuperator is 18 mm.

C

6Fit the new probe/adaptor assembly into the recuperator and re---assemble in reverse order.

A

54TEMPERATURE PROBE REPLACEMENT

1Disconnect the electrical supply.

2Remove the front and right hand side casing panels (refer to frame 42).

Removal of CH temperature probe

3To remove the CH temperature probe close 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.

Removal of DHW temperature probe

3To remove the DHW temperature probe close off the isolating cock of the DHW circuit at the bottom of the boiler.

4Empty the DHW circuit.

Replacement

5Disconnect the leads from the probe to be replaced and unscrew it .

6Screw in the new probe, using a new gasket, reconnect and re---assemble in reverse order.

CH temperature

DHW temperature

 

probe

probe

Drainage cock

 

 

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 SupplyMini HE C24, mini HE C28 Size of expansion vesselHydraulic Loss Remaining pump capacity 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 Installation Cutting the Flue RingFitting the Extension Kits 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 boilerFor external controls wiring see frame Incoming mains wiring detailElectrical Connections Pictorial Wiring Control pcb Installation Functional Flow DiagramElectrical Connections for a Combi Boiler External Electrical ControlsInstallation Initial Lighting To Adjust Pressures Maximum valve settingMinimum 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 ReplacementServicing FAN Replacement Venturi ReplacementAIR Pressure Switch Replacement Pump Replacement Complete Servicing Electronic CONTROL/IGNITION PCB Replacement Boiler mode setting CH Flow Switch Membrane Replacement Servicing CH Flow Switch ReplacementServicing DHW Flow Switch Replacement DHW Filter and Flow Limiter ReplacementFlow limiter Recuperator Replacement Servicing Primary Heat Exchanger ReplacementDiverter Valve Internal Parts Replacement Servicing Diverter Valve Actuator ReplacementCH Drain Cock Replacement Servicing DHW Heat Exchanger ReplacementCondensate Trap Replacement To clean the condensate trap and drainTo replace the condensate trap 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 TrainingInstaller the contact fire not does Installer Water hot orCorrectly Ignition at attempt Maintenance CleaningGAS of Escape Lights Diagnostic Boiler the Light toClearances Minimum

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.

The Mamiya C32, introduced in the early 1970s, is renowned for its precision engineering and versatility. This model features interchangeable lenses, allowing photographers to switch between different focal lengths for creative flexibility. The camera supports 120 and 220 film formats, enabling higher film capacities for extended shooting sessions. An essential feature of the C32 is its built-in light meter, which enhances exposure accuracy by providing real-time readings. The camera's bright waist-level finder offers excellent viewing comfort and composition aid, attracting those who appreciate a more hands-on shooting experience.

Next in line, the Mamiya C24 offers a slightly more compact and lighter design, making it an appealing option for documentary and street photographers. While still featuring the electronic leaf shutter system utilized in the C32, the C24 omits built-in metering, which encourages users to develop their exposure skills. The lens selection remains robust, with options ranging from wide-angle to telephoto, allowing for creative versatility. The C24's rugged build quality and reliable shutter performance make it a trusted companion in various shooting conditions.

Lastly, the Mamiya C28 provides a perfect blend of portability and advanced capabilities. With its ergonomic design and improved lens coatings, the C28 offers enhanced image quality with better contrast and sharpness. Similar to its predecessors, it utilizes an interchangeable lens system but enhances user convenience through quick-to-use shutter speeds and aperture settings. The camera is also compatible with a range of accessories, such as flash units and close-up attachments, further expanding its creative potential.

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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