Appendix 'A' - Information Relating To Propane Firing - Hamworthy Wessex 100 M100 Installation, Commissioning And Servicing Instructions

NOTE:-
LPG FUELS - IT IS STRONGLY RECOMMENDED THAT, ON LPG INSTALLATIONS, GAS DETECTION
EQUIPMENT IS FITTED. THIS EQUIPMENT SHOULD BE POSITIONED NEAR THE BOILER AND AT LOW
LEVEL. IT IS ALSO IMPORTANT THAT THE SPACE HOUSING THE BOILER IS ADEQUATELY
VENTILATED AT HIGH AND LOW LEVEL. REFER TO MAIN INSTALLER'S GUIDE.
1.0 INTRODUCTION
The operation of the Wessex 100 M range of boilers
rd
on LPG-Propane (3
nd
family) I
Natural Gas (2
installation details described in the main body of the
installer's guide should be followed.
however, differences in the construction and setting
of the propane fired boiler which are as follows: -
a) The main gas orifice (located in the gas valve
outlet elbow) is replaced with that detailed in the
Performance and General Data Information table
below.
Figure 2.2 Performance and General Data Information
GENERAL DATA
Boiler Input High Fire - kW (Gross)
Boiler Input High Fire - kW (Nett)
Boiler Output High Fire - kW
Boiler Output Low Fire - kW
FLUE DATA
Approx. Flue Gas Temperature - °C
Approx. Flue Gas Volume @ 10.5 - 11.0% CO
GAS DATA
Gas Inlet Connection
Nominal Gas Inlet Pressure - mbar
Maximum Gas Inlet Pressure - mbar
Gas Pressure Setting High Fire - mbar
Gas Pressure Setting Low Fire - mbar
Gas Flow Rate High Fire - m
Gas Flow Rate High Fire - kg/h
Orifice Diameter - mm
* NOTE! Flue gas volumes are based on a gross flue gas temperature of 15°C at 1013.25mbar.
11.0 COMMISSIONING AND TESTING
11.4.3 Checking/Adjusting Inlet and Setting
Pressures
Refer to Section 11.4.3 (p17) embodied in the
natural gas section of these instructions.
HAMWORTHY HEATING LTD
Appendix A Wessex 100 M Series
INFORMATION RELATING TO PROPANE FIRING
family) I
is similar to that on
3P
and the design and
2H
There are
3
/h
b) The gas pipe connecting the gas valve to the fan
inlet must be replaced with the 'LPG' assembly.
c) The nominal gas inlet pressure for propane
should be 37mbar.
d) Relevant labels are replaced to indicate the
appropriate gas for which the boiler is set up to fire.
The following tables and paragraphs, using the
same numbering system as the main installer's
guide, highlight the different values and procedures
to be used when firing propane, and should be used
in conjunction with the Main Installer's Guide.
3
- m /h*
2
11.4.4 Combustion Check
Refer to Section 11.4.4 (p17) embodied in the
natural gas section of these instructions.
30
WESSEX 100 M
M100 M200
118.3 236.6
108.8 217.6
100 200
50
130
141 282
R1¼
37
45
25.0
5.0
4.45 8.90
8.60 17.22
6.5
M300
354.9
326.4
300
423
13.36
25.83
500001080/F