Alpha Alpha HE25 User manual

Supplementary LPG Boiler
Instructions
Alpha HE25 and HE33
Alpha HE25 G.C. No. 47 532 42
Alpha HE33 G.C. No. 47 532 44
British Gas
Service Listed
For use with LPG (Propane) only
Leave these instructions with the User
Wall Mounted, Fan Assisted, Room Sealed, Gas Fired,
High Efficiency Condensing Boiler Range
Nepicar House, London Road,
Wrotham Heath, Sevenoaks,
Kent TN15 7RS
For Technical help or for Service call ...
ALPHA HELPLINE
Tel: [phone]

2Alpha HE25 and HE33 LPG Supplement
37.0
14.8
13.2
2.9
62
144
37.0
14.8
82
180
37.0
14.8
9.9
2.2
62
144
37.0
14.8
82
180
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 HE25 and HE33 are high efficiency condensing combination boilers providing both central heating and domestic
hot water at mains pressure.
The boilers are designed for use with a fully pumped sealed and pressurised heating system using only PROPANE gas.
2 TECHNICALDATA
2.1 PERFORMANCE - PROPANE GAS
MAX.
27.4
93 400
25.0
85 300
24.0
81 900
32.3
12.92
1.06
37.4
MIN.
16.3
55 600
14.5
49 500
14.0
47 800
11.6
4.64
0.63
22.2
MAX.
27.4
93 400
25.0
85 300
32.3
12.92
1.06
37.4
MIN.
11.4
38 900
9.9
33 800
5.6
2.24
0.5
17.6
Room sealed chamber
panel fitted
Room sealed chamber
panel fitted
Central Heating
Heat Input kW
(Gross) Btu/h
Heat Output (condensing) kW
(50°C/30°C) Btu/h
Heat Output (non-condensing) kW
(80°C/60°C) Btu/h
Burner Pressure mbar
Settings in wg
Gas Supply Pressure (LPG) mbar
in wg
Gas Rate (LPG) m³/h
ft³/h
CH Water Temp. (Approx. max.) °C
°F
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 (LPG) m³/h
ft³/h
Flow Rate at 35°C Rise L/min
gal/min
Outlet Water Temp. (Approx. max.) °C
°F
2.2 PERFORMANCE - PROPANE GAS
MAX.
36.6
124 800
33.2
113 300
32.0
109 200
32.1
12.84
1.43
50.4
MIN.
22.4
76 400
19.7
67 200
19.2
65 500
11.1
4.44
0.88
31.0
MAX.
36.6
124 800
33.2
113 300
32.1
12.84
1.43
50.4
MIN.
15.2
51 800
13.2
45 000
4.7
1.88
0.6
21.1
Room sealed chamber
panel fitted
Room sealed chamber
panel fitted
Central Heating
Heat Input kW
(Gross) Btu/h
Heat Output (condensing) kW
(50°C/30°C) Btu/h
Heat Output (non-condensing) kW
(80°C/60°C) Btu/h
Burner Pressure mbar
Settings in wg
Gas Supply Pressure (LPG) mbar
in wg
Gas Rate (LPG) m³/h
ft³/h
CH Water Temp. (Approx. max.) °C
°F
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 (LPG) m³/h
ft³/h
Flow Rate at 35°C Rise L/min
gal/min
Outlet Water Temp. (Approx. max.) °C
°F
Alpha HE25 Alpha HE25
Alpha HE33 Alpha HE33

3
Alpha HE25 and HE33 LPG Supplement
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.
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
6 PARTS LIST
Only the main burner injectors are special to Propane boilers. For other 'Short List Spare Parts', refer to the Installation and
Servicing instructions supplied with the boiler.
Propane components
Main injector kit (15 x 0.8 mm injectors plus washers)
Injector manifold complete with injectors HE25
HE33
Qty.
1
1
1
Alpha Part No.
3.016466
1.022379
1.022380
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 HE25 boiler requires a gas rate of 1.90 kg/h (4.20 lb/h) or 3.7 litres/h of liquid gas.
The Alpha HE33 boiler requires a gas rate of 2.56 kg/h (5.65 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 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.
7 SERVICING
When servicing or replacing boiler components follow the procedures as described in the main Installation and Servicing
instructions supplied with the boiler.
Remembering the parts special for Propane boilers and the burner pressures special to Propane boilers given in this leaflet.

DETAILS OF BOILER INSTALLATION
Date of Installation: ......................................................................
Name of Installer:.........................................................................
Address: ......................................................................................
....................................................................................................
....................................................................................................
....................................................................................................
Postcode: ....................................................................................
Telephone No: .............................................................................
Boiler Serial Number: (LPG) ........................................................
(see inside controls panel hinged cover)
08/07/D212
Part No. 1.026218
Rev.15.025735/000
Instructions compiled and designed by Publications 2000 - Tel: [phone]
These instructions have been carefully prepared but we reserve the right to
alter the specification at any time in the interest of product improvement.
© Alpha Therm Limited 2007.
Alpha Therm Limited.
NepicarHouse,LondonRoad,WrothamHeath,
Sevenoaks, Kent TN15 7RS
Tel: [phone]
email: [email protected]
website: www.alpha-boilers.com