SERVICING

SERVICING

41 SERVICING SCHEDULE

To ensure the continued safe and efficient operation of the appliance it is recommended that it is checked at regular intervals and serviced as necessary.

The frequency of servicing will depend upon the installation condition and usage but should be carried out at least annually.

It is the law that any service work must be carried out by a registered CORGI installer.

In IE, servicing work must be carried out by a competent person.

1Turn the heating controls to maximum so that the boiler lights and remains running. Check that no other gas appliances in the house are in use or likely to be used.

2When the boiler has settled down check the gas rate at the meter (if the meter is of the pointer type you should time only complete revolutions of the pointer). Check the gas rate against the figures given in Table 2 for CH operation.

3For a combination boiler, fully open a hot water tap. When the boiler has settled down check the gas rate, as in step 2, checking the measured rate against the figures given in Table 3 for HW operation.

4Run the boiler and check the percentage of CO and CO2 in the flue gasses at the sampling point indicated in the following drawing.

Air intake

Exhaust gas

Sampling points

Sampling points

 

Note. If your meter reads CO in parts per million the figure must be divided by 10,000 to convert it to a percentage.

5If the ratio of CO/CO2 is less than ,004 and the gas rates measured in steps 3 and 4 are close to nominal then no further action need be taken. If not, proceed to step 6.

6Clean the main burner.

7Clean the heat exchanger.

8Check the injectors for blockage or damage.

9 Check that the flue terminal is unobstructed.

10Check and clean the condensate trap and drain (see frame 73).

The servicing procedures are covered more fully in Frames 42 to 47 and MUST be carried out in sequence.

WARNING.

ALWAYS turn off the gas supply at the gas service cock, and switch off and disconnect the electricity supply to the appliance before servicing.

Switching the boiler on/off switch ‘off’ does not fully isolate the boiler.

ALWAYS test for gas tightness and carry out functional checks on reassembly.

IMPORTANT. When work is complete the boiler inner front sealing panel MUST be correctly refitted, making a good seal.

DO NOT OPERATE THE BOILER IF THE SEALlNG PANEL IS NOT FITTED.

Complete the service section in the Benchmark Commissioning Checklist.

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mini HE --- Installation & Servicing

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Mamiya C28, C32, C24 manual Servicing Schedule
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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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