023-001-058 REV C Fresh Air Supply System Instructions Page 4 of 41
piece of the twin air hose into the top of the belt bracket, screwing down the retaining nut tightly by
HAND;
it should not be
possible for the Y piece to rotate once the nut is tightened.
Fit the belt and bracket around the waist, adjusting the belt to fit the user, and snap the belt buckle together. The belt should be
tightened so that the belt bracket and comfort pad sit flat against the lower back. The belt bracket should lie behind the user
with the main air supply hose pointing down and outwards.
Adjust the vertical position at which the hoses are held together such that when placed over the head the hose assembly does
not slip down over the shoulders. Ensure hoses are not twisted when placed over the head. Fit the fullface mask according to the
specific instructions supplied with the mask. Connect the twin air hose to the fullface mask by screwing the threaded nut into
the fullface mask tightly by
HAND.
Inspection & Fit Testing of System
BEFORE USE, THE FOLLOWING CHECKS SHOULD BE CARRIED OUT:
Leak Tightness Testing of Unpowered Apparatus
(With the facemask, double hose, belt bracket donned and reinforced hose
fitted)
Block the strainer end of the air supply hose and inhale. This should create a negative pressure inside the mask, thus sucking the
mask onto the face. If this effect is not obtained, re-fit mask and check security of hose connectors then re-test.
Leak Tightness Testing of Powered Apparatus
(With the facemask, double hose with o/f valve, belt bracket donned and
reinforced hose fitted)
Disconnect the turbine end of the main air supply hose, block and inhale. This should create a negative pressure inside the mask,
thus sucking the mask onto the face. If this effect is not obtained, re-fit mask and check security of hose connectors then re-test.
If supplying twin user
’
s this test should be carried out by both users.
General Maintenance and Cleaning
Double air tube with or without overflow valve
Visually inspect:
The valve in the overflow valve assembly of the twin air hose for damage, or distortion.
The underside sealing surface & the O-ring it sits on should be completely free of dust and dirt. (If necessary clean both surfaces
with a soft cloth soaked in clean water and allow to dry).
The hoses for any signs of obvious damage, holes tears etc,
The presence and condition of the rubber 'O'-ring fitted to the
plastic 'Y' piece connection of the twin air hose. Replace if
necessary
Reinforced hose
Check for the presence and condition of both O-rings of the
reinforced hose. Replace if necessary.
The security of the hose clamps. The reinforced hose for holes,
cuts, tears, abrasions, kinks or flattening.
Full facemask
For maintenance and cleaning of the fullface mask refer to the
specific supplied instructions.
Mini Turbine Unit
The turbine unit is fitted with a coarse prefilter which is located
behind the end plate without the mains cable connection, it can
be accessed by removing the 3 screws. The prefilter consists of a
foam disc, it should be checked at minimum of 3 monthly
intervals and if dirty or damaged be replaced. The unit should be
cleaned prior to storage and stored in a dry warm atmosphere,
preferably within a protective enclosure.
Electrical safety
Visually inspect:
The cable along its length for damage ie torn insulation, exposed
conductors etc.
Security and condition of the plug fitted to the cable.
Do not use the unit if any of the above conditions are found
Periodic electrical safety checks must be carried out by a competent person.
Should the turbine unit fail to operate check the supply, the fuse in the plug (230volt version only) and the fuse in the unit
(Replacement fuse.1.5 amp250V Anti-surge type RS 415-581)
WARNING
failure to use the correct type of replacement fuse may
cause permanent damage to the Unit.
