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.

C

B

G M

A

F

I

H

B

K

L

E

D

J

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

F

 

G

L

E

H

I

D

mini HE --- Installation & Servicing

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

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.

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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.