INSTALLATION

 

 

35 TO ADJUST PRESSURES

(burner pressure).

 

By rotating clockwise the pressure increases.

Nomenclature of the parts on the gas valve

HModulation operator’s electric connectors I Minimum gas pressure adjustment

J Maximum gas pressure adjustment K On---off operators electric connector L On---off operators

M Gas valve inlet pressure test point N Burner pressure test point

10Turn the boiler off and re---connect the wire to the modulating operator.

11Start the boiler and check again the maximum gas pressure setting.

12Turn the boiler off and disconnect the gauge and close the gas valve outlet pressure test point N

Important: after the gas pressure checks and any adjustment operations, all of the test points must be sealed and replace the adjustment protection cap.

Ignition rate adjustment

1Turn on the boiler.

INSTALLATION

N

M

J

L

I

H

K

2Check that the boiler lights up uniformly and adjust the ignition gas pressure, if necessary.

To adjust the ignition gas pressure:

3Open the gas valve outlet pressure test point N and connect the gauge.

4Rotate the radiator temperature control C as indicated in the next figure and ensure that the room thermostat, if fitted, is set to “heat demand”.

5Run the boiler in c.h. mode (do not open any d.h.w. tap)

ABC D E

6Press and hold the reset button D for about 10 seconds until the lock---out signal light E blinks.

7The lamps A should give the indication of the next figure; if not then press the reset button D until you obtain it.

Where:

Lamp ON

 

1Remove the front panel of the case.

2Open the gas valve inlet pressure test point M at the valve input, connect a suitable pressure gauge and check the gas pressure of the supply network.

3Remove the gauge and close the pressure test point M.

4Open the burner pressure test point N and connect the gauge.

5Remove the protection cap from the mechanical pressure adjustment components (I and J)

6Start the boiler at its maximum power.

Operate the boiler in DHW mode or ensure that the boiler is not range rated if the test is carried out in CH mode.

Maximum valve setting

7If necessary, rotate the maximum gas pressure adjustment J using a spanner until you obtain the required pressure as indicated on Table 1 at page 4 (burner pressure).

By rotating clockwise the pressure increases.

Minimum valve setting

8Turn the boiler off and disconnect one of the two connectors H.

9Start the boiler and if necessary, rotate the minimum gas pressure adjustment I using a spanner until you obtain the required pressure as indicated on Table 1 at page 4

Lamp OFF

8Press and hold the reset button D for about 5 seconds until the lock---out signal light E is switched off.

The boiler runs in c.h. mode and the lights A give the follow indication:

Where:

Flashing lamp, alone

 

or simultaneously with

 

an other lamp.

 

Lamp OFF

9Rotate the DHW temperature control B on a position corresponding to an adequate ignition pressure. By rotating clockwise the pressure increases.

Suggested ignition pressures:

Natural gas G20 --- 6 (2,4) mbar (in w.g.)

Propane G31 --- 13 (5,3) mbar (in w.g.)

10Make a note of the position of the DHW temperature control B.

11Turn the boiler off and on positioning the main switch C as indicated in the next figure.

30

mini HE --- Installation & Servicing

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Image 30
Mamiya C32, C28, C24 manual To Adjust Pressures, Maximum valve setting, Minimum valve setting
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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.

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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.
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