3. APPLIANCE DATA AND EFFICIENCY
3.1 Appliance data.
The appliance information label is on the inner face of the back panel at the lower left
hand side. It is visible when the fascia is removed.
3.2 Efficiency.
The efficiency of this appliance has been measured as specified in BS 7977 - 1 and
the result is as below:
Model
Efficiency % (Gross)
347 Helmsley 73
The gross calorific value of the fuel has been used for this efficiency calculation. The
test data from which it has been calculated has been certified by Advantica
Certification services (0087). The efficiency value may be used in the UK
Government's Standard Assessment Procedure (SAP) for energy rating of dwellings.
The conversion of net efficiency to gross was achieved by multiplying the net
efficiency by the following conversion factor from Table E3 of SAP 2005, rounding
down to the nearest whole number.
Page 8
© GDC Group Limited 2014.
INSTALLER GUIDE
Gas Natural (G20)
Inlet Pressure 20mbar
Input - Max. (Gross) 5.5 kW (18,767 Btu/h)
Input - Min. (Gross) 1.57W (5,357 Btu/h)
Burner Test Pressure (Cold) 17.95 + 0.75mbar (7.2 + 0.3in w.g.)
Gas Connection 8mm pipe
Burner Injector - Upper (Centre Radiants) Cat 28 - 170
Burner Injector - Lower (Outer Radiants) Cat 28 - 170
Pilot & Atmosphere Sensing Device OPNG9093
Ignition Electronic (Mounted on gas valve)
Aeration Non-adjustable
Gas Conversion factor from net to gross efficiency
Natural Gas 0.901
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