Boiler Location - Alpha CD25C Instructions

Alpha CD35C
Central Heating
Heat Input (H )
s
(Gross)
Heat Input (H )
i
(Net)
Heat Output (H condensing)
s
(50°C/30°C)
Heat Output (H non-condensing) kW
i
(80°C/60°C)
Differential Burner
Room sealed
chamber panel
Pressure
fitted
Gas Supply Pressure (LPG)
Gas Rate (LPG)
%CO
Boiler model
Min
CD25C 10.0
CD28C 10.1
CD35C 9.1
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.
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.
MAX.
kW 31.6
Btu/h 107 800
kW 28.5
Btu/h 97 200
kW 30.3
Btu/h 103 400
28.0
Btu/h 95 550
mbar 2.49
in wg 1.0
mbar
37.0
in wg
14.8
m³/h 1.21
ft³/h 42.7
content (± 0.2%)
2
LPG (propane)
CH Max DHW max
10.7 10.6
10.6 10.6
10.7 10.8
Alpha CD35C
Domestic Hot Water
MIN.
Heat Input (H
8.9
(Gross)
30 600
Heat Input (H
8.1
(Net)
27 600
Output to Water (H
8.5
(modulating)
29 000
Differential Burner
7.8
Pressure
26 600
Gas Supply Pressure (LPG)
0.23
0.09
Gas Rate (LPG)
Flow Rate at 35°C Rise
0.34
12.0
Specific Flow Rate (D) at 30°C Rise L/min
(Flow rate @ 30K to EN625)
Sedbuk rating
Efficiency SAP efficiency
band
A
A
A
) kW
s
Btu/h
) kW
i
Btu/h
) kW
s
Btu/h
mbar
Room sealed
chamber
in wg
panel fitted
mbar
in wg
m³/h
ft³/h
L/min
gal/min
gal/min
NOx class
(%)
91.9 5
91.6 5
92.4 5
CD25C/28C/35C LPG Supplement
MAX. MIN.
38.0 8.9
129 600 30 600
34.3 8.1
117 000 27 600
34.6 8.0
118 100 27 300
3.43 0.23
1.37 0.09
37.0
14.8
1.46 0.34
51.5 12.0
14.2
3.13
15.6
3.44
3