GENERAL
4
mini HE
--- Installation & Servicing
Table 1 --- Boiler Data
mini HE C24
mini HE C28
Gas supply type & connection
II
2H3P
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)
Max working pressure (sealed system)
bar (lb/in
2
)
3.0 (43.5)
Max DHW water inlet pressure
bar (lb/in
2
)
10.0 (145.0)
Min DHW water inlet pressure
bar (lb/in
2
)
0.3 (4.4)
Electrical supply
230 Vac 50 Hz
Max power consumption
W
140
150
External fuse rating
3 A
Internal fuse rating
T 2A
Water content --- CH
litre (gal.)
2.1 (0.46)
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)
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)
Table 2 --- Performance Data --- Central Heating
mini HE C24
mini HE C28
Max
Min
Max
Min
Burner pressure (Hot)
G20
G31
mbar (in.w.g.)
10.8 (4.3)
35.5 (14.2)
1.5 (0.6)
7.7 (3.1)
10.0 (4.0)
36.0 (14.4)
1.6 (0.6)
7.7 (3.1)
Input based on nett CV
kW (btu/h)
25.0 (85 295)
11.0 (37 530)
29.0 (98 942)
13.0 (44 353)
Input based on gross CV
kW (btu/h)
27.7 (94 516)
12.2 (41 628)
32.2 (109 871)
14.4 (49 135)
Output Non Condensing G20
G31
kW (btu/h)
24.6 (83 973)
23.7 (80 894)
10.2 (34 936)
10.2 (34 936)
28.3 (96 488)
27.4 (93 599)
12.1 (41 284)
12.1 (41 284)
Output Condensing
G20
G31
kW (btu/h)
26.6 (90 754)
26.6 (90 754)
11.1 (37 871)
10.8 (36 997)
30.7 (104 602)
30.7 (104 602)
13.2 (44 965)
12.9 (44 016)
Gas consumption (Hot) G20
G31
l/s (ft
3
/h)
l/s
0.74 (93.6)
0.30
0.32 (40.9)
0.13
0.85 (108.4)
0.34
0.35 (45.2)
0.14
Seasonal efficiency*
G20
G31
(SEDBUK) %
Band B 87.7
Band B 86.9
Band B 87.5
Band B 87.0
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
Maximum
Burner pressure (Hot)
G20
G31
mbar (in.w.g.)
10.8 (4.3)
35.5 (14.2)
10.0 (4.0)
36.0 (14.4)
Input based on nett CV
kW (btu/h)
25.0 (85 295)
29.0 (98 942)
Input based on gross CV
kW (btu/h)
27.7 (94 516)
32.2 (109 871)
Output Non Condensing G20
G31
kW (btu/h)
24.6 (83 973)
23.7 (80 894)
28.3 (96 488)
27.4 (93 599)
Output Condensing
G20
G31
kW (btu/h)
26.6 (90 754)
26.6 (90 754)
30.7 (104 602)
30.7 (104 602)
Gas consumption (Hot) G20
G31
l/s (ft
3
/h)
l/s
0.74 (93.6)
0.30
0.85 (108.4)
0.34
Flow 35 ° C temp. rise
l/m (gpm)
10.1 (2.2)
11.7 (2.6)
Domestic hot water specific rate
l/m (gpm)
11.9 (2.6)
13.9 (3.1)
Note: the gas consumption is calculated using a calorific
value of 38.7 MJ/m
3
(1038 Btu/ft
3
) gross or 34.9 MJ/m
3
(935
Btu/ft
3
) 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/m
3
)
b.
FOR FT
3
/H
--- divide the gross heat input (Btu/h) by the
gross C.V. of the gas (Btu/ft
3
)
Key to Symbols:
IE = Ireland, GB = United Kingdom (Countries of destination)
PMS = Maximum operating pressure of water
C
12
C
32
C
42
= a room sealed appliance designed for
connection via concentric ducts to a horizontal or vertical
terminal or twin flue system.
II
2H3P
= 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.
