A-A-2952
adjust or shall be adjustable in height to compensate for
varying pile depths. The agitator shall be provided with high quality bristles
and may employ beaters. The bristles or the entire agitator shall be easily
replaceable on class B and C cleaners. When tools and attachments are employed
with the type II cleaners, a means shall be provided to automatically or
manually uncouple the agitator. Manual uncoupling shall not require
disassembly. Type III cleaners shall include an agitator, powered by an
independent motor contained in the nozzle housing. The motor shall be rated a
minimum of 1/10 hp (74.6 W) and shall operate from the same power source
provided by the power/connection for the cleaner. The power cord for the
agitator shall be securely clamped to or molded into the hose and wand
assembly. The power switch for the agitator may be located on the grip.
3.10 Handle. The handles of type II cleaners shall be of adequate
strength and rigidity to permit elevating and rotating the agitator assembly
about the rear wheels without detectable flexure. The handle shall pivot
smoothly from the vertical to a near-horizontal position. A detent or “park”
position shall be provided to hold the handle in the vertical position for
storage. Other detents or “work” positions are permitted. Provision for cord
storage shall be provided on the handle. The power switch may be located on the
handle.
3.11 Attachments.
3.11.1 General. All cleaners shall be furnished with one bare floor
tool, one crevice tool, one upholstery nozzle, and one brush. Type I and III
cleaners shall also be furnished with one carpet tool. All cleaners shall be
furnished with one 42-inch (1067 mm) minimum length wand assembly, and one
1-1/4 inch (31.7) minimum inside diameter, 120-inch (3050 mm) minimum length
hose assembly.
3.11.2 Tool construction. The attachments for all cleaners shall be
fabricated from a non-ferrous alloy or an impact-resistant synthetic material.
Metal tools shall be suitably plated or finished to resist corrosion and
prevent marking. All edges shall be rounded and smooth.
3.11.3 Hose construction. The hose shall be fabricated from non-marking
materials impervious to attack from common cleaning solutions. A swivel
coupling shall be provided on the hose end attaching to the cleaner. The hose
shall be able to withstand a minimum compressive load of 150 lb (667 N) applied
to any portion of the hose no closer than 12 inches (305 mm) from any fitting
by means of parallel to the axis of the hose for not less than 2 minutes. The
comprehensive load shall cause no rupture of any portion of the hose and the
resulting hose diameter shall not differ more than 1/4 inch (6.35 mm) from the
diameter prior to the compressive load.
3.11.4 Couplings. The engaged wand, hose, and tools shall be able to withstand
a tensile force of 25 lb (111 N) for 2 minutes at each coupling without
separation. Couplings shall engage and release satisfactorily before and after
being subjected to the 25-lb (111 N) tensile force.
3.12 Performance.
3.12.1 Noise. The maximum noise generated by the cleaners shall be 85
dbA when tested in accordance with ASTM F1334.
3.12.2 Continuous duty. The motors for class A and C cleaners shall be rated for 1 hour, varying duty. The motors for class B cleaners shall be rated for continuous duty. Continuous duty is defined as constant operation for an 8-hour work day. As evidence of the continuous duty capability, class B cleaners shall be capable of withstanding a continuous 10-hour run with the orifice wide open. All lubrication points except sealed bearings shall be visually checked after this run. The lubricant shall be visually examined and shall not contain any metallic particles and lubricant quantity shall be ample. Evidence of galling or
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