GENERAL
4
Mini --- Installation & Servicing
Ta b l e 1 --- B o i l e r D a t a
Mini C24 Mini C28 Mini C32 Mini S24 Mini S28
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
) 2.5 (36.3)
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 150 170 180 150 170
External fuse rating 3A
Internal fuse rating 3.15 AF
Water content --- CH litre (gal.) 1.0 (0.22) 1.1 (0.242) 1.0 (0.22) 1.1 (0.242)
Water content --- DHW litre (gal.) 0.2 (0.044) ---
Dry weight kg (lb.) 37 (81.6) 39 (86.0) 39 (86.0) 36 (79.4) 38 (83.8)
Size: Height / Width / Depth mm (in.) 703 (27 11/16”) / 400 (15 3/4”) / 310 (12 3/16”)
Lift weight kg (lb.) 35.5 (78.4) 36.5 (80.6) 36.5 (80.6) 34.5 (76.2) 35.5 (78.4)
Ta b l e 2 --- P e r f o r m a n c e D a t a --- C e n t r a l H e a t i n g
Mini C24
Mini S24
Mini C28
Mini S28
Mini C32
Max Min Max Min Max Min
Burner pressure (Hot) G20
G31
mbar
(in.w.g.)
11.7 (4.7)
35.7 (14.3)
1.8 (0.7)
6.1 (2.4)
11.7 (4.7)
35.7 (14.3)
1.8 (0.7)
5.7 (2.3)
11.7 (4.7)
35.7 (14.3)
1.8 (0.7)
6.7 (2.7)
Input based on nett CV kW
(btu/h)
26.60
(90 759)
11.00
(37 532)
31.10
(106 113)
13.00
(44 356)
35.20
(120 102)
15.50
(52 886)
Input based on gross CV kW
(btu/h)
29.52
(100 732)
12.21
(41 656)
34.52
(117 773)
14.43
(49 230)
39.07
(133 306)
17.20
(58 686)
Output kW
(btu/h)
24.30
(82 912)
9.10
(31 049)
28.40
(96 901)
10.80
(36 850)
32.00
(109 184)
12.70
(43 332)
Gas consumption (Hot) G20
G31
l/s (ft
3
/h)
l/s
0.763 (97.0)
0.309
0.315 (40.1)
0.128
0.892 (113.5)
0.361
0.373 (47.4)
0.151
1.010 (128.4)
0.400
0.444 (56.5)
0.176
Seasonal efficiency* (SEDBUK)
%
Band D
78.2
Band D
78.3
Band D
78.3
NOx classification Class 3 Class 2 Class 3
*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 calculat ed have been certified by a notified body.
Ta b l e 3 --- P e r f o r m a n c e D a t a --- D o m e s t i c H o t W a t e r
Mini C24 Mini C28 Mini C32
Maximum
Burner pressure (Hot) G20
G31
mbar
(in.w.g.)
11.7 (4.7)
35.7 (14.3)
11.7 (4.7)
35.7 (14.3)
11.7 (4.7)
35.7 (14.3)
Input based on nett CV kW (btu/h) 26.60 (90 759) 31.10 (106 113) 35.20 (120 102)
Input based on gross CV kW (btu/h) 29.52 (100 732) 34.52 (117 773) 39.07 (133 306)
Output kW (btu/h) 24.30 (82 912) 28.40 (96 901) 32.00 (109 184)
Gas consumption (Hot) G20
G31
l/s (ft
3
/h)
l/s
0.763 (97.0)
0.309
0.892 (113.5)
0.361
1.010 (128.4)
0.400
Flow 35 ˚Ctemp.rise l/m (gpm) 10.0 (2.2) 11.6 (2.6) 13.1 (2.9)
Domestic hot water specific
rate
l/m (gpm) 11.6 (2.6) 13.6 (3.0) 15.3 (3.4)
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 th e gross heat input (kW) by the gross
C.V. of the gas (MJ/m
3
)
b. FOR FT
3
/H --- divide the g ross h eat input (Btu/h) by the
gross C.V. of the gas (Btu/ft
3
)
Key to Symbols:
IE = Ireland, GB = United Kingdom (Countr i es of destination)
PMS = Maximum operating pressure of water
C
12
C
32
C
52
= a room sealed appliance designed for
connection via concent ric 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 inju ry during the installation, servicing or cl eaning
of this appliance care should be taken handling edges of sheet steel components.