3
CD18/24/30/32 LPG Supplement
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.
5
COMMISSIONING
The boiler has been tested and factory set for use with Propane gas and it should only be necessary to ensure the correct gas
supply pressure of 37 mbar is available.
2.3
GAS SUPPLY
The Alpha CD18S boiler requires a gas rate of 1.3 kg/h (2.8 lb/h) or 2.5 litres/h of liquid gas.
The Alpha CD24 boiler requires a gas rate of 1.9 kg/h (4.1 lb/h) or 3.6 litres/h of liquid gas.
The Alpha CD30S boiler requires a gas rate of 2.2 kg/h (4.7 lb/h) or 4.2 litres/h of liquid gas.
The Alpha CD32 boiler requires a gas rate of 2.53 kg/h (5.6 lb/h) or 4.9 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, except for the CD18S which requires a 15 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
13.2
2.9
15.4
3.4
Alpha CD32C
MAX.
36.2
123 500
32.6
111 300
32.0
109 200
6.07
2.4
1.4
49.4
MIN.
7.3
24 900
6.6
22 500
6.6
22 500
0.4
0.16
0.28
9.9
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 CD30S and CD32C
MAX.
31.1
106 100
28.0
95 550
29.8
101 700
28.0
95 500
4.48
1.8
1.2
42.4
MIN.
7.3
24 900
6.6
22 500
7.0
23 900
6.5
22 200
0.4
0.16
0.28
9.9
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
37.0
14.8
