Adjust the helmet suspension assembly as follows:

1.0     Sweatband Adjustment

1.1     Hold the helmet upside down, with the front towards you.

1.2     Detach the helmet suspension assembly from the helmet by withdrawing the four tapered slides from their housings

1.3     Disconnect the wrap-around tab

1.4     Lift up both ends of the sweatband and disconnect the size adjustment slide

1.5     Insert the size adjustment slide into the appropriate holes for wearer comfort. Replace both sweatband ends and refasten the wrap-around tab

 

2.0  Depth Adjustment and Balance

2.1     The suspension assembly maintains a fixed distance between the wearer’s head and the helmet

2.2     When refitting the helmet suspension assembly the tapered slides must be firmly seated in their housings

2.3     To attach the chin strap, insert the strap links over the two posts (10). Adjust for comfort using its slide adjuster

 

3.0  Window System

The window system is an important part of the helmet and comprises:-
a)  An inner polycarbonate safety window secured by a moulded rubber gasket to the helmet shell

b)  An intermediate window secured within the window frame on one of the two location lugs

c)  Replacement outer windows retained in place by the hinged window frame

With this system installed correctly the blaster can easily remove an etched outer replacement window when required by simply drawing his hand across the front of the helmet and pulling the tab. The window will tear along the perforations and the border is retained within the window frame ensuring the sealing effect is maintained throughout the life of the pack of outer windows

WARNING: The user must ensure that the windows are correctly installed prior to each blasting operation. Failure to do so could result in reduced visibility and/or personal injury

3.1     Unfasten the window frame latch and open the window frame assembly

3.2     Check seating of the window gasket

3.3     Check that the protective film has first been removed from both faces of the inner safety window and the window is correctly and securely in position in the root of the window slot of the window gasket and the gasket remains correctly positioned onto the helmet shell

3.4     Remove the intermediate window

3.5     Remove any retained replacement outer window material from the window frame and check that the sponge seal on the inside of the window frame is in good condition and in position

3.6     Take up the pack of six replacement outer lens material and check that the top lens has the tab folded in the opposite way to the other five

3.7     Locate the replacement outer windows within the window frame so that the set of  tabs are located outside the frame towards the hinge and the sixth tab is located inside the frame and folded towards the helmet shell

3.8     Install the intermediate inner window onto the interior of the window frame by locating one of the two slots onto one of the retaining protrusions on the window

3.9     Securely fasten the window frame latch and ensure that all window are correctly clamped in position

3.10   Attach the breathing hose assembly between the helmet inlet and air control valve outlet. Ensure the coupling gaskets or ‘o’ rings are in place and where appropriate the black hose cuff connects to the belt air control valve.
DO NOT OVER TIGHTEN.

3.11   Connect the other end to the air control valve outlet, again ensuring the required seal is in place and air flow is in the correct direction

3.12   Connect the requisite lengths of breathing air supply hose (30) (31) to the inlet of the air control valve using the quick connector coupling (34)
NB It is recommended that 10mm bore breathing air supply hose (32) (33) be used when installing the optional Climate Control Tube (22)

3.13   The air supply hose should then be connected to a Clemco breathing air filtration system (see separate owners manual)

4.0 AIR SUPPLY
WARNING: Oxygen and oxygen enriched air supplies must not be used with this respirator system

4.1     The helmet must be supplied with minimum respirable breathing air at 170ltrs per min. (6 cubic ft per min)

4.2     The air compressor should be equipped with a high temperature or carbon monoxide (CO) warning device or both. An overloaded compressor, or one in poor mechanical condition may produce carbon monoxide (CO) and objectionable odours

4.3     When using portable compressors, precautions must also be taken to prevent exhaust gases from entering the air intake. It is advisable to have the exhaust gases ducted downwind to a safe non-combustible area

4.4     A breathing air filter should be installed between the air compressor and the air fed helmet. This should remove objectionable odours, pipe scale, condensed moisture, oil mist, oil vapours and any other particulate matter

4.5     Checks should be carried out prior to use and at suitable intervals to ensure that the volume and quality of breathing air meets legislated Health & Safety requirements. The user shall ensure that the pressure range of the air supply to the helmet system is within the limits recommended by the manufacturer.  (See table 1 for guidance).

WARNING: An approved belt mounted air control valve must always be used with this air fed helmet system

WARNING: When using the optional climate control tube (22) appropriate ear protection must be worn

 

Table 1

Air Supply Hose length x i.d.	Pressure at Air Filter bar (psi)	Air Flow ltr/min
10m x 6mm	3.8               (55) 2.3               (33)	270 170
20m x 6mm	4.7               (68) 2.9               (42)	270 170
40m x 6mm	6.2               (90) 4.2               (61)	270 170
10m x 10mm	2.4               (35) 1.4               (20)	270 170
60m x 10mm	3.2               (46) 1.9               (26)	270 170

NB For hose lengths totalling more than 40m, 10mm breathing air supply hose should be used.