Appendix 4 Requirements for the steam generator
United Kingdom
1.
CHARACTERISTICS
1.1.
The steam generator used for the test shall have the following general characteristics:
1.1.1.
The water container shall have a capacity of at least 2,25 litres.
1.1.2.
The heat loss at boiling point shall not exceed 75 W in an ambient temperature of – 3 ± 1 °C.
1.1.3.
The fan shall have a capacity of 0,07 to 0,10 m3/min at 0,5 mbar static pressure.
1.1.4.
Six steam outlet holes shall be positioned at the top of the generator, around the perimeter spaced at equal distances (see Figure 1):
1.1.5.
The generator shall be calibrated at – 3 ± 1 °C to give reading for each 70 ± 5 g/h output up to a maximum of n times this figure, where n is the maximum number of seating positions designated by the manufacturer.
Figure 1
Diagram of steam generator
1.2.
The specified parts shall have the following dimensional and material characteristics:
1.2.1.
Nozzle
1.2.1.1.
Dimensions:
1.2.1.1.1.
Length 100 mm.
1.2.1.1.2.
Inside diameter 15 mm.
1.2.1.2.
Material:
1.2.1.2.1.
Brass.
1.2.2.
Dispersion chamber
1.2.2.1.
Dimensions:
1.2.2.1.1.
Pipe outside diameter 75 mm.
1.2.2.1.2.
Wall thickness 0,38 mm.
1.2.2.1.3.
Length 115 mm.
1.2.2.1.4.
Six evenly spaced holes of 6,3 mm in diameter, 25 mm above the bottom of the dispersion chamber.
1.2.2.2.
Material:
1.2.2.2.1.
Brass.