HAMWORTHY HEATING LTD
SHERBORNE
500001103/E
Appendix A
Sherborne
INFORMATION RELATING TO PROPANE FIRING
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 GUIDES.
1.0 INTRODUCTION
The operation of the Sherborne
range of boilers on
LPG-Propane (3
rd
family)I
3P
is similar to that on
Natural Gas (2
nd
family)I
2H
and the design and
installation details described in the main body of the
installer’s guide should be followed. There are
however, differences in the construction and setting
of the propane fired boiler which are as follows: -
a) The addition of a main gas orifice located in the
gas valve outlet – see Figure 11.2.
b) Relevant labels are replaced to indicate the
appropriate gas for which the boiler is set up to fire.
c) The nominal gas inlet pressure for propane
should be 37mbar.
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.
2.2 Performance and General Data Information – LPG Propane
GENERAL DATA
Sherborne S65
Sherborne S70
c
Boiler Input kW (Gross) - maximum
76.0
Boiler Input kW (Nett) - maximum
70.0
Boiler Input kW (Gross) - minimum
15.2
Boiler Input kW (Nett) - minimum
14.0
Boiler Output kW -minimum
13.6
Boiler Output kW (condensing 50) - maximum
71.4
Boiler Output kW (non condensing)- maximum
64.0
66.5
FLUE DATA
Nominal Flue Dia. mm
Single pipe = 100, dual concentric = 80/125 or 100/150
Approx. Flue Gas Temperature (condensing)
°
C
--
55
Approx. Flue Gas Temperature (non-condensing)
°
C
140
65
Approx. Flue Gas Vol. @ 10.5 – 11.5% CO
2
& NTP(Dry)
m
3
/h
*
102
GAS DATA
Nominal Gas Inlet Press. mbar
37
Maximum Gas Inlet Press. mbar
45
Gas Flow Rate -maximum m
3
/h (kg/h)
2.9 (5.5)
Gas Inlet Connection Pipe Thread Size
Rp¾”
11.0 COMMISSIONING AND TESTING
11.5.4 Combustion Checks
Combustion figures for Propane should be as follows :-
CO
2
= 9.5-10.0% (Dry flue gas)
O
2
= 5-6%
CO = 0-50ppm: However figure should not exceed
200ppm under normal operating conditions.
37
Summary of Contents for Sherborne Series
Page 8: ...HAMWORTHY HEATING LTD SHERBORNE 500001103 E Figure 1 1 Boiler Installation Typical 2...
Page 29: ...HAMWORTHY HEATING LTD SHERBORNE 500001103 E Figure 10 6 Gas Pipe Fitting 23...
Page 45: ...HAMWORTHY HEATING LTD SHERBORNE 500001103 E NOTES 39...
Page 46: ...HAMWORTHY HEATING LTD SHERBORNE 500001103 E NOTES 40...
Page 47: ...Notes...
