2
500E LPG Supplement
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 500E boiler is a wall mounted, fan assisted room-sealed combination boiler with unvented hot water storage. Heat
output is controlled by a modulating gas valve.
The boiler, providing both central heating and domestic hot water at mains pressure, is designed for use with a fully pumped,
sealed and pressurised heating system using only PROPANE gas.
2
TECHNICAL DATA
2.1
PERFORMANCE - PROPANE GAS
MAX.
34.5
117 700
28.0
95 550
35.0
14.0
1.3
47.1
MIN.
13.2
45 000
10.4
35 500
5.8
2.32
0.51
18.0
MAX.
34.5
117 700
28.0
95 550
35.0
14.0
1.3
47.1
20.0
4.4
MIN.
13.2
45 000
10.4
35 500
5.8
2.32
0.51
18.0
1.0
0.22
Room sealed chamber
panel fitted
Room sealed chamber
panel fitted
Central Heating
Heat Input
kW
Btu/h
Heat Output (modulating)
kW
Btu/h
Burner Pressure
mbar
Settings
in wg
Gas Supply Pressure (LPG)
mbar
in wg
Gas Rate
m³/h
ft³/h
CH Water Temp. (Approx. max.) °C
°F
37.0
14.8
82
180
37.0
14.8
65
149
12.0 minutes
5.0 minutes
Domestic Hot Water
Heat Input
kW
(Gross)
Btu/h
Output to Water (modulating)
kW
Btu/h
Burner Pressure
mbar
Settings
in wg
Gas Supply Pressure (LPG)
mbar
in wg
Gas Rate
m³/h
ft³/h
Flow Rate
L/min
G.P.M.
Outlet Water Temp. (Approx. max.) °C
°F
Time to raise water storage 50°C
Reheat time for 70% of storage
2.2
GAS SUPPLY
The boiler requires a gas rate of 2.4 kg/h (5.3 lb/h) or 4.7 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 boiler requires 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.
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.
3
BOILER LOCATION
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.
