Alpha CB24, CB28, SY9-24 Instruction
Supplementary LPG Boiler
Instructions
Alpha CB24/28 and SY9-24
Range of Wall Mounted, Fan Assisted, Room Sealed,
Gas Fired Boilers
For Technical help or for Service call ...
ALPHA HELPLINE
Tel: 0870 3001 964
Nepicar House, London Road,
Wrotham Heath, Sevenoaks,
Kent TN15 7RS
Service Listed
Alpha CB24X British Gas G.C. No. 47 532 14
Alpha CB24 British Gas G.C. No. 47 532 15
Alpha CB28 British Gas G.C. No. 47 532 16
Alpha CB28X British Gas G.C. No. 47 532 17
Alpha SY9-24 British Gas G.C. No. 41 532 01
For use with LPG (Propane) only
Leave these instructions with the User
1 INTRODUCTION
This supplement is for the LPG model of the boiler; it must be read in conjunction with the 'Installation and Servicing
Instructions' supplied with the boiler and provides the extra information which is particular to LPG.
The Alpha CB24/28 range of combination boilers are wall mounted, fan assisted room-sealed combination boilers providing
both central heating and domestic hot water at mains pressure.
The Alpha SY9-24 is a System boiler providing heating only, for sealed central heating systems.
The boilers are designed for use with a fully pumped sealed and pressurised heating system using only PROPANE gas.
2 TECHNICAL DATA
2.1 PERFORMANCE - PROPANE GAS
Alpha CB24, CB24X and SY9-24 Alpha CB24, CB24X
Central Heating
Heat Input kW
(Gross) Btu/h
Heat Output (modulating) kW
Btu/h
Burner Pressure mbar
Settings in wg
Room sealed chamber
panel fitted
Gas Supply Pressure (LPG) mbar
in wg
Gas Rate (LPG) m³/h
ft³/h
CH Water Temp. (Approx. max.) °C
°F
MAX.
28.4
96 900
23.3
79 500
35.5
14.2
1.1
39.1
37.0
14.8
82
180
MIN.
12.1
41 300
9.3
31 700
7.2
2.9
0.45
16.1
Domestic Hot Water
Heat Input kW
(Gross) Btu/h
Output to Water (modulating) kW
Btu/h
Burner Pressure mbar
Settings in wg
Room sealed chamber
panel fitted
Gas Supply Pressure (LPG) mbar
in wg
Gas Rate (LPG) m³/h
ft³/h
Flow Rate at 35°C Rise L/min
G.P.M.
Outlet Water Temp. (Approx. max.) °C
°F
MAX.
28.4
96 900
23.3
79 500
35.5
14.2
1.1
39.1
MIN.
12.1
41 300
9.3
31 700
7.2
2.9
37.0
14.8
0.45
16.1
9.5
2.1
62
144
2.2 PERFORMANCE - PROPANE GAS
Alpha CB28 and CB28X Alpha CB28 and CB28X
Central Heating
Heat Input kW
(Gross) Btu/h
Heat Output (modulating) kW
Btu/h
Burner Pressure mbar
Settings in wg
Room sealed chamber
panel fitted
Gas Supply Pressure (LPG) mbar
in wg
Gas Rate (LPG) m³/h
ft³/h
CH Water Temp. (Approx. max.) °C
°F
CB24/28 and SY24 LPG Supplement
2
MAX.
34.0
116 000
28.0
95 500
36.0
14.4
1.3
47.1
MIN.
14.3
48 800
11.2
38 200
7.5
3.0
37.0
14.8
0.45
16.1
82
180
Domestic Hot Water
Heat Input kW
(Gross) Btu/h
Output to Water (modulating) kW
Burner Pressure mbar
Settings in wg
Room sealed chamber
panel fitted
Gas Supply Pressure (LPG) mbar
Gas Rate (LPG) m³/h
Flow Rate at 35°C Rise L/min
Outlet Water Temp. (Approx. max.) °C
Btu/h
in wg
ft³/h
G.P.M.
°F
MAX.
34.0
116 000
28.0
95 5000
36.0
14.4
1.3
47.1
MIN.
14.3
48 800
11.2
38 200
7.5
3.0
37.0
14.8
0.45
16.1
11.4
2.5
62
144
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