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

Page 4
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Mamiya C28, C32, C24 manual General, Boiler Data, Performance Data --- Central Heating, Domestic Hot Water

C28, C24, C32 specifications

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