SERVICING

SERVICING

43

BURNER REMOVAL AND CLEANING

6 Undo the four screws F placed at the right and left sides of

1

Disconnect the electrical supply.

the burner and extract it.

 

2

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

 

3

Undo the screws A and remove the fan holder bracket B

 

 

and the combustion chamber panel C.

 

4

Remove the screws D and the plate E.

 

B

 

 

 

 

 

 

F

 

 

A

7

Brush off any deposits that may have collected on the

 

 

 

burner, ensuring that the flame ports are unobstructed.

 

 

Note: brushes with metallic bristles MUST NOT be used.

 

8

Inspect the spark and detection electrodes. Ensure they

 

 

are clean and in good condition; replace if necessary.

 

9

Check the spark electrodes gap is correct.

A

 

4 mm (5/32”)

 

 

 

 

 

 

C

 

 

 

 

E

 

10 mm

 

 

 

 

(3/8”)

 

 

D

Ignition

 

Burner blade

 

 

 

 

 

Female

Detection

Male

 

 

 

 

 

10

Check that the spark and detection electrodes leads are in

5 Disconnect the electrodes leads.

 

good condition and renew as necessary.

 

44 BURNER PRESSURE CHECK

If the burner pressures are incorrect ensure the inlet pressure,

 

with the appliance running, is correct (refer Table 1).

After any servicing, reference should be made to:

If the burner pressures require adjustment refer to frame 35

 

“To adjust pressures”.

 

 

--- Table 2 and Table 3 (or the data plate) which quote details

If the appliance still does not operate correctly refer to the

of the burner pressures.

appropriate fault finding chart.

 

45 CLEANING THE HEAT EXCHANGER

2

Place a plastic sheet or similar beneath the heat

 

 

exchanger and remove all visible loose deposits from the

1 Open the combustion chamber as explained in steps 1 to

heat exchanger fins, using a suitable brush.

3 of frame 43.

 

 

 

46

RE---ASSEMBLY

Re---

assemble the boiler in the following order:

3Refit the burner.

4Reconnect the electrodes to the electronic p.c.b.. See frame 43 for correct connectors.

5Refit the combustion chamber panel and the fan holder bracket and plate E.

6Refit the inner case cover.

IMPORTANT. Ensure the boiler sealing panel is correctly fitted and that a good seal is made.

7Refit the boiler side and front panels.

8Turn on the gas supply at the gas service cock.

9 Reconnect the electrical supply.

36

mini HE --- Installation & Servicing

Page 35 Page 37
Page 36
Image 36
Mamiya C32, C28 Servicing Burner Removal and Cleaning, Burner Pressure Check, Cleaning the Heat Exchanger, Re---Assembly
Page 35 Page 37

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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