Mamiya C24, C32, C28 manual General Checks

Page 32

INSTALLATION

INSTALLATION

38 GENERAL CHECKS

Make the following checks for correct operation:

1Hot water.

a. Fully open all DHW taps in turn and ensure that water flows freely from them.

b. Close all taps except the furthest one from the boiler and check that the boiler is firing at maximum rate.

c. Ensure that DHW temperature of approximately 35 ûC rise is obtained at the tap. This corresponds to a flow rate of about

litres/min (gpm)

models

 

 

10.1 (2.2)

mini HE C24

 

 

11.7 (2.6)

mini HE C28

 

 

13.1 (2.9)

mini HE C32

 

 

d. Turn off the DHW tap.

2Central heating (all models)

Operate each control separately and check that the main burner or circulating pump, as the case may be, responds.

3Gas rate --- G20

Check the boiler gas rate when the boiler is at full output.

The gas rate checked at the gas meter, with no other appliance in use will normally be:

litres/min (ft3/min)

models

44.2 (1.56)

mini HE C24

 

 

51.2 (1.81)

mini HE C28

 

 

58.8 (2.08)

mini HE C32

 

 

If this check is not possible, ensure that the burner pressure is:

mbar (in. w.g.)

models

 

mini HE C24

10.8 (4.3)

 

mini HE C28

10.0 (4.0)

 

mini HE C32

13.0 (5.2)

 

 

4Water circulation system

Note. Fernox Superfloc flushing solution should be used during the flushing procedure.

a. With the system HOT examine all water connections for tightness.

b. With the system still HOT, turn off the gas, water and electricity supplies to the boiler and drain down, to complete the flushing process.

c. Refill the system, adding inhibitor (see ’Water Treatment’), if required.

Vent as necessary to clear all air and, again, check for water tightness. After venting, repressurise as required.

d. Balance the system. It is suggested that, initially, all radiator handwheel valves (or TRVs if fitted) be set fully open, that all lockshield valves be set a half ---turn open.

Make minor adjustments to each radiator to achieve the same differential on all.

5Flue system

Check the integrity of the flue outlet and air inlet system to the boiler ensuring no leaks are evident from piping joints or flue/air sampling points.

Finally, set the system controls to the users requirements.

If an optional programmer kit is fitted refer to the instructions supplied.

32

mini HE --- Installation & Servicing

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Contents Installation and servicing Mini HE --- Installation & Servicing Document Amendments General Boiler DataPerformance Data --- Central Heating Domestic Hot WaterContents Benchmark Commissioning Checklist DetailsGeneral Boiler Water Connection Boiler ClearancesGAS Safety IntroductionOptional Extra Kits Safe HandlingFlue Installation Requirements GAS SupplySafe Handling of Substances Location of Boiler and Flue OutletWater Circulation System Water TreatmentAIR Supply Additional PumpsElectrical Supply RequirementsHydraulic Loss Remaining pump capacity Mini HE C24, mini HE C28Size of expansion vessel General Boiler Control Interlocks Domestic HOT Water RequirementsGeneral Boiler Water Circuit Diagram Installation Installation Boiler AssemblyInstallation Unpacking Pack a contentsHardware pack contents Pack B contentsInstallation Fitting the Flue SystemRear Flue Assembly Refer to the following diagram for the model mini HE C32Twin Pipe Flue DuctWall Mounting Template rear flue Fitting the Extension Kits Installation Cutting the FlueRing Installation Fitting the Optional Roof Flue Roof Flue KIT CONTENTS/OPTIONSInstallation Flue Terminal Position Flue ArrangementAssembling the Roof Flue KIT Flue over 3 meters longInstallation Fitting the Wall Mounting Plate Fit the service valves, washers and tail pipes as shownMounting the Boiler ConnectionsSafety Valve Drain Condensate DrainLocate the gasket and flue turret on the top of the boiler Flues over 1 meter longElectrical Connections For external controls wiring see frameIncoming mains wiring detail Pictorial Wiring Installation Functional Flow Diagram Control pcbExternal Electrical Controls Electrical Connections for a Combi BoilerInstallation Initial Lighting Minimum valve setting To Adjust PressuresMaximum valve setting Anti Cycling Setting Commissioning and TestingElectrical Installation Gas InstallationGeneral Checks Installation GAS Conversion Handing OverServicing Servicing ScheduleServicing Removal of Outer and Inner Casing Servicing Burner Removal and Cleaning Cleaning the Heat ExchangerRE---ASSEMBLY Burner Pressure CheckServicing FAN and Venturi Removal and Cleaning Remove the fan by sliding it towards left see the arrowSpark and Detection Electrode Replacement Burner ReplacementBurner Injectors Replacement When replacing any componentServicing Overheat Thermostat Replacement Flue Temperature Probe ReplacementTemperature Probe Replacement Removal of CH temperature probeGAS Valve Replacement Expansion Vessel ReplacementAIR Pressure Switch Replacement Servicing FAN ReplacementVenturi Replacement Pump Replacement Complete Servicing Electronic CONTROL/IGNITION PCB Replacement Boiler mode setting Servicing CH Flow Switch Replacement CH Flow Switch Membrane ReplacementFlow limiter Servicing DHW Flow Switch ReplacementDHW Filter and Flow Limiter Replacement Servicing Primary Heat Exchanger Replacement Recuperator ReplacementServicing Diverter Valve Actuator Replacement Diverter Valve Internal Parts ReplacementServicing DHW Heat Exchanger Replacement CH Drain Cock ReplacementTo replace the condensate trap Condensate Trap ReplacementTo clean the condensate trap and drain Normal operation OFFFault Finding FindingFrom Fault finding Fault Finding Fault Refer back to page 52 of fault finding to continue Fault Finding From Burner mod. mini HE C28, mini HE C32 075535Fan mod. mini HE C28, mini HE C32 17398422 23 Installer Notification Guidelines GAS Boiler Commissioning Checklist Service Interval Record Technical Training Ideal boilersCorrectly Ignition at attempt Installer the contact fire not doesInstaller Water hot or GAS of Escape MaintenanceCleaning Clearances Minimum Lights DiagnosticBoiler the Light to

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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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.