Mamiya C28, C32 General, Boiler Data, Performance Data --- Central Heating, Domestic Hot Water

Page 4

GENERAL

Table 1 --- Boiler Data

 

 

mini HE C24

mini HE C28

mini HE C32

 

 

 

 

 

 

 

 

 

Gas supply type & connection

 

 

 

II2H3P G20 20mbar, G31 37mbar, 22 mm copper

Inlet / Outlet connection --- Domestic Hot Water

 

 

 

15 mm copper

 

 

 

 

 

 

 

 

 

 

 

 

 

Flow & return connection --- Central Heating

 

 

 

 

22 mm copper

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Flue terminal diameter

mm (in.)

 

 

 

 

100 (4)

 

 

 

 

 

 

 

 

 

 

 

 

 

Average Flue Temp. --- Mass Flow Rate

Deg C g/s

90

 

18.8

90

 

21.1

90

 

21.5

 

 

 

 

 

 

 

 

 

 

 

Max working pressure (sealed system)

bar (lb/in2)

 

 

 

 

3.0 (43.5)

 

 

 

Max DHW water inlet pressure

bar (lb/in2)

 

 

 

10.0 (145.0)

 

 

 

Min DHW water inlet pressure

bar (lb/in2)

 

 

 

 

0.3 (4.4)

 

 

 

Electrical supply

 

 

 

 

230 Vac 50 Hz

 

 

 

 

 

 

 

 

 

 

 

Max power consumption

W

 

140

 

150

 

150

 

 

 

 

 

 

 

 

 

 

External fuse rating

 

 

 

 

 

3 A

 

 

 

 

 

 

 

 

 

 

 

 

Internal fuse rating

 

 

 

 

F1---F2 3.15 AF

 

 

 

 

 

 

 

 

 

 

 

Water content --- CH

litre (gal.)

 

2.1 (0.46)

 

2.2 (0.48)

 

2.2 (0.48)

 

 

 

 

 

 

 

 

 

 

Water content --- DHW

litre (gal.)

 

 

 

 

0.2 (0.044)

 

 

 

 

 

 

 

 

 

 

 

Dry weight

kg (lb.)

 

42.5 (93.7)

 

44.5 (98.1)

 

44.5 (98.1)

 

 

 

 

 

 

 

Size: Height / Width / Depth

mm (in.)

 

 

803 (31 5/8”) / 400 (15 3/4”) / 345 (13 9/16”)

 

 

 

 

 

 

 

 

Lift weight

kg (lb.)

 

37.5 (82.7)

 

39.5 (87.1)

 

39.5 (87.1)

 

 

 

 

 

 

 

 

 

 

Table 2 --- Performance Data --- Central Heating

 

 

 

 

 

 

 

 

 

 

 

 

 

mini HE C24

 

mini HE C28

 

mini HE C32

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Max

Min

 

Max

 

Min

 

Max

Min

 

 

 

 

 

 

 

 

 

 

 

 

 

Burner pressure (Hot)

G20

mbar

10.8 (4.3)

1.5 (0.6)

10.0 (4.0)

 

1.6 (0.6)

13.0 (5.2)

2.7 (1.1)

 

G31

(in.w.g.)

35.5 (14.2)

7.7 (3.1)

36.0 (14.4)

 

7.7 (3.1)

36.0 (14.4)

7.3 (2.9)

 

 

 

 

 

 

 

 

 

 

 

 

 

Input based on nett CV

 

kW (btu/h)

25.0 (85 295)

11.0 (37 530)

29.0 (98 942)

 

13.0 (44 353)

33.3 (113 620)

15.7 (53 568)

 

 

 

 

 

 

 

 

 

 

 

 

 

Input based on gross CV

 

kW (btu/h)

27.7 (94 516)

12.2 (41 628)

32.2 (109 871)

 

14.4 (49 135)

37.0 (126 244)

17.4 (59 368)

 

 

 

 

 

 

 

 

 

 

 

 

Output Non Condensing G20

kW (btu/h)

24.6 (83 973)

10.2 (34 936)

28.3 (96 488)

 

12.1 (41 284)

32.2 (109 866)

15.0 (51 180)

 

G31

 

23.7 (80 894)

10.2 (34 936)

27.4 (93 599)

 

12.1 (41 284)

32.2 (109 866)

15.0 (51 180)

 

 

 

 

 

 

 

 

 

 

 

 

 

Output Condensing

G20

kW (btu/h)

26.6 (90 754)

11.1 (37 871)

30.7 (104 602)

 

13.2 (44 965)

34.4 (117 374)

15.6 (53 227)

 

G31

 

26.6 (90 754)

10.8 (36 997)

30.7 (104 602)

 

12.9 (44 016)

34.4 (117 374)

15.6 (53 227)

 

 

 

 

 

 

 

 

 

 

 

 

 

Gas consumption (Hot)

G20

l/s (ft3/h)

0.72 (91.5)

0.31 (39.5)

0.83 (105.5)

 

0.37 (47.0)

0.95 (121.0)

0.45 (57.2)

 

G31

l/s

0.30

0.13

0.34

 

0.14

0.39

0.18

 

 

 

 

 

 

 

 

 

 

 

 

Seasonal efficiency*

G20

(SEDBUK)

 

Band B 87.7

 

Band B 87.6

 

Band B 86.8

 

G31

%

 

Band B 87.0

 

Band B 87.1

 

Band B 88.8

 

 

 

 

 

 

 

 

 

 

 

NOx classification

 

 

 

 

 

 

Class 2

 

 

 

 

 

 

 

 

 

*The value is used in the UK Government’s Standard Assessment Procedure (SAP) for energy rating of dwellings.

 

The test data from which it has been calculated have been certified by a notified body.

 

 

 

Table 3 Performance Data---

--- Domestic Hot Water

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

mini HE C24

 

mini HE C28

 

mini HE C32

 

 

 

 

 

 

 

Maximum

 

 

 

 

 

 

 

 

 

 

 

Burner pressure (Hot)

G20

mbar

 

10.8 (4.3)

 

10.0 (4.0)

 

13.0 (5.2)

 

G31

(in.w.g.)

 

35.5 (14.2)

 

36.0 (14.4)

 

36.0 (14.4)

 

 

 

 

 

 

 

 

 

Input based on nett CV

 

kW (btu/h)

 

25.0 (85 295)

 

29.0 (98 942)

 

33.3 (113 620)

 

 

 

 

 

 

 

 

 

Input based on gross CV

 

kW (btu/h)

 

27.7 (94 516)

 

32.2 (109 871)

 

37.0 (126 244)

 

 

 

 

 

 

 

 

Output Non Condensing G20

kW (btu/h)

 

24.6 (83 973)

 

28.3 (96 488)

 

32.2 (109 866)

 

G31

 

 

23.7 (80 894)

 

27.4 (93 599)

 

32.2 (109 866)

 

 

 

 

 

 

 

 

 

Output Condensing

G20

kW (btu/h)

 

26.6 (90 754)

 

30.7 (104 602)

 

34.4 (117 374)

 

G31

 

 

26.6 (90 754)

 

30.7 (104 602)

 

34.4 (117 374)

 

 

 

 

 

 

 

 

 

Gas consumption (Hot)

G20

l/s (ft3/h)

 

0.72 (91.5)

 

0.83 (105.5)

 

0.95 (121.0)

 

G31

l/s

 

 

0.30

 

 

0.34

 

0.39

 

 

 

 

 

 

 

 

 

Flow 35 ûC temp. rise

 

l/m (gpm)

 

10.0 (2.2)

 

11.7 (2.6)

 

13.1 (2.9)

 

 

 

 

 

 

 

 

Domestic hot water specific rate

l/m (gpm)

 

11.9 (2.6)

 

13.9 (3.1)

 

14.6 (3.3)

Note: the gas consumption is calculated using a calorific value of 38.7 MJ/m3 (1038 Btu/ft3) gross or 34.9 MJ/m3 (935 Btu/ft3) nett.

To obtain the gas consumption at different calorific value: ---

a. FOR L/S --- divide the gross heat input (kW) by the gross C.V. of the gas (MJ/m3)

b. FOR FT3/H --- divide the gross heat input (Btu/h) by the gross C.V. of the gas (Btu/ft3)

Key to Symbols:

IE = Ireland, GB = United Kingdom (Countries of destination) PMS = Maximum operating pressure of water

C12 C32 C52 = a room sealed appliance designed for connection via concentric ducts to a horizontal or vertical terminal or twin flue system.

II2H3P = appliance designed for use on 2nd family gas group H or 3rd family gas group 3P

CAUTION. To avoid the possibility of injury during the installation, servicing or cleaning

of this appliance care should be taken handling edges of sheet steel components.

4

mini HE --- Installation & Servicing

Image 4
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 RequirementsSize of expansion vessel Mini HE C24, mini HE C28Hydraulic 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 Ring Installation Cutting the FlueFitting 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 longIncoming mains wiring detail For external controls wiring see frameElectrical Connections Pictorial Wiring Installation Functional Flow Diagram Control pcbExternal Electrical Controls Electrical Connections for a Combi BoilerInstallation Initial Lighting Maximum valve setting To Adjust PressuresMinimum 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 ReplacementVenturi Replacement Servicing FAN 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 ReplacementDHW Filter and Flow Limiter Replacement Servicing DHW Flow Switch 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 ReplacementTo clean the condensate trap and drain Condensate Trap ReplacementTo 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 Water hot or Installer the contact fire not doesCorrectly Ignition at attempt Cleaning MaintenanceGAS of Escape Boiler the Light to Lights DiagnosticClearances 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.