3
CD25C/28C/35C LPG Supplement
37.0
14.8
3 BOILER LOCATION
Installation pipes, cylinders and pressure regulators should be fitted in accordance with BS 5482:1. Bulk tank installation must
comply with the requirements of the Home Office code of practice for the storage of liquefied petroleum gas at fixed installations.
The boiler must not be installed in a room or internal space below ground level, e.g. in a basement or cellar, except where at
least one side is open to ground level.
4 INSTALLATION
In addition to the regulations and requirements stated in the Installation and Servicing instructions, the boiler must be installed
in accordance with BS 5482:1 - The Installation of Propane Burning Appliances in Permanent Dwellings.
2.3 GAS SUPPLY
The Alpha CD25C boiler requires a gas rate of 1.87 kg/h (4.0 lb/h) or 3.6 litres/h of liquid gas.
The Alpha CD28C boiler requires a gas rate of 2.22 kg/h (4.8 lb/h) or 4.2 litres/h of liquid gas.
The Alpha CD35C boiler requires a gas rate of 2.67 kg/h (5.7 lb/h) or 5.0 litres/h of liquid gas.
The supply pipes must be capable of delivering this quantity of gas in addition to the demand from any other appliances in the
house. The boilers require at least a 22 mm gas supply pipe.
The complete installation must be tested for gas soundness against leakage.
The local Propane gas supplier should be consulted, at the installation planning stage, in order to establish the availability of an
adequate supply of gas.
37.0
14.8
14.2
3.13
15.6
3.44
Alpha CD35C
MAX.
38.0
129 600
34.3
117 000
34.6
118 100
3.43
1.37
1.46
51.5
MIN.
8.9
30 600
8.1
27 600
8.0
27 300
0.23
0.09
0.34
12.0
Domestic Hot Water
Heat Input (H
s
)kW
(Gross) Btu/h
Heat Input (H
i
)kW
(Net) Btu/h
Output to Water (H
s
)kW
(modulating) Btu/h
Differential Burner mbar
Pressure in wg
Gas Supply Pressure (LPG) mbar
in wg
Gas Rate (LPG) m³/h
ft³/h
Flow Rate at 35°C Rise L/min
gal/min
Specific Flow Rate (D) at 30°C Rise L/min
(Flow rate @ 30K to EN625) gal/min
Room sealed
chamber
panel fitted
Alpha CD35C
MAX.
31.6
107 800
28.5
97 200
30.3
103 400
28.0
95 550
2.49
1.0
1.21
42.7
MIN.
8.9
30 600
8.1
27 600
8.5
29 000
7.8
26 600
0.23
0.09
0.34
12.0
Room sealed
chamber panel
fitted
Central Heating
Heat Input (H
s
)kW
(Gross) Btu/h
Heat Input (H
i
)kW
(Net) Btu/h
Heat Output (H
s
condensing) kW
(50°C/30°C) Btu/h
Heat Output (H
i
non-condensing) kW
(80°C/60°C) Btu/h
Differential Burner mbar
Pressure in wg
Gas Supply Pressure (LPG) mbar
in wg
Gas Rate (LPG) m³/h
ft³/h
%CO
2
content (± 0.2%) Sedbuk rating
LPG (propane) Efficiency
band
A
A
A
SAP efficiency
(%)
91.9
91.6
92.4
Min
10.0
10.1
9.1
CH Max
10.7
10.6
10.7
DHW max
10.6
10.6
10.8
NOx class
5
5
5
Boiler model
CD25C
CD28C
CD35C
To Next Page
Loading...
