SERVICING

REPLACEMENT OF COMPONENTS

SERVICING

48 GENERAL

When replacing any component:

1Isolate the electricity supply at the switched spur.

N.B. Turning the boiler “ON/OFF” switch does not isolate the live supply to the boiler.

2Turn off the gas supply.

IMPORTANT. When work is complete the inner case cover must be correctly fitted, ensuring that a good seal is made.

THE BOILER MUST NOT BE OPERATED IF THE INNER CASE COVER IS NOT FITTED.

If the CH and/or the DHW circuits have been emptied:

3Open the hydraulic circuit cocks, refill / re---pressurise pipeworks and vent the system.

4Test fire the boiler

5Disconnect the filling loop.

49 SPARK AND DETECTION ELECTRODE REPLACEMENT

1Disconnect the electrical supply.

2

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

3

Open the combustion chamber and disconnect the

 

electrodes leads.

4

Remove the burner. Refer to frame 43.

5

Undo the screws that hold the electrodes and remove.

6

Fit new electrodes as necessary following the sequence

7Check the spark gap.

4 mm (5/32”)

10 mm (3/8”)

illustrated.

Ignition 1st

Ignition

Burner blade

Ignition 2nd Detection 3rd

Female

Detection Male

 

8Re---assemble in reverse order.

9Check the ignition and operation of the burner.

50

BURNER REPLACEMENT

3

Fit the electrodes on the new burner and check the spark

1

Remove the burner as explained in frame 43

 

gap.

4

Re---assemble in reverse order.

2

Remove the spark and detection electrodes.

 

 

 

Refer to frame 49.

5

Check the operation of the boiler.

51BURNER INJECTORS REPLACEMENT

1 Remove the burner. Refer to frame 43.

2 Unscrew the injectors from the gas manifold.

3Check that the new injectors are of the correct size and fit it using new gaskets.

4

Re---assemble in reverse order.

Gas manifold

5

Check the operation of the boiler.

 

Injectors Burner

38

mini HE --- Installation & Servicing

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Image 38
Mamiya C24, C32, C28 manual Spark and Detection Electrode Replacement, Burner Replacement, Burner Injectors Replacement
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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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