Mamiya C32, C28, C24 manual General Boiler Control Interlocks, Domestic HOT Water Requirements

Page 12

GENERAL

5BOILER CONTROL INTERLOCKS

Thermostatic radiator valves.

Caradon Ideal Ltd. support the recommendations made by leading manufacturers of domestic heating controls that heating systems utilising full thermostatic radiator valve control of temperature in individual rooms should also be fitted with a room thermostat controlling the temperature in a space served by radiators not fitted with such a valve as stated in BS5449. Such an arrangement will provide for a more efficient control of the environment and will also avoid the continuous running of the circulation pump during programmed heating ON periods, saving electrical energy.

It is therefore strongly recommended that, when thermostatic radiator valves are used, the space heating temperature control over a living/dining area or a hallway, having a heat requirement of at least 10% of the boiler output, is achieved using a room thermostat whilst other rooms are individually controlled by thermostatic radiator valves as stated in BS5449.

For further information refer to “Good Practise Guide 143” a publication of the energy efficiency office, available from the building research establishment Garston Watford WD2 7JR tel: +44 (0) 1923 664258

The boiler is fitted with an automatic internal bypass. No further system bypass is required.

Typical installation

TRV

TRV

TRV Room

T/stat

D AB

Balancing valve

6DOMESTIC HOT WATER REQUIREMENTS

1The domestic hot water service must be in accordance with BS 5546 and BS 6700.

2For the minimum and maximum working pressures of the mini HE C24, mini HE C28 and mini HE C32 domestic hot water circuit refer to Table 1, page 4.

3The cold water supply pipe should be flushed before fitting the boiler.

4The boilers are suitable for connection to most types of washing machine and dishwashing appliances.

5When connecting to suitable showers, i.e. those designed for modulating domestic hot water, ensure that:

a.The cold inlet to the boiler is fitted with an approved anti---vacuum or syphon non---return valve.

b.Hot and cold supplies are of equal pressure.

6Hard water areas

In areas where the water is ’hard’ it is recommended that a proprietary scale---reducing device is fitted into the boiler cold supply, within the requirements of the local water company.

12

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 RequirementsMini HE C24, mini HE C28 Size of expansion vesselHydraulic Loss Remaining pump capacity 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 Installation Cutting the Flue RingFitting the Extension Kits 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 longFor external controls wiring see frame Incoming mains wiring detailElectrical Connections Pictorial Wiring Installation Functional Flow Diagram Control pcbExternal Electrical Controls Electrical Connections for a Combi BoilerInstallation Initial Lighting To Adjust Pressures Maximum valve settingMinimum 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 ReplacementServicing FAN Replacement Venturi ReplacementAIR Pressure Switch Replacement Pump Replacement Complete Servicing Electronic CONTROL/IGNITION PCB Replacement Boiler mode setting Servicing CH Flow Switch Replacement CH Flow Switch Membrane ReplacementServicing DHW Flow Switch Replacement DHW Filter and Flow Limiter ReplacementFlow limiter Servicing Primary Heat Exchanger Replacement Recuperator ReplacementServicing Diverter Valve Actuator Replacement Diverter Valve Internal Parts ReplacementServicing DHW Heat Exchanger Replacement CH Drain Cock ReplacementCondensate Trap Replacement To clean the condensate trap and drainTo replace the condensate trap 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 boilersInstaller the contact fire not does Installer Water hot orCorrectly Ignition at attempt Maintenance CleaningGAS of Escape Lights Diagnostic Boiler the Light toClearances Minimum

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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