1.1     Turn ON the air supply to the helmet

1.2     Check all hoses and connections for air leaks. Take corrective action to eliminate any leaks

1.3     Ensure that air is entering the helmet and fully complies with 4.1 . Prior to use this may be determined by attaching the air flow kit (WV 90 AFK) and optional air quality kit (D5185710) Frequent monitoring of air flow in use may be carried out by consulting the pressure indicator(28) which should read clear of the red sector

IMPORTANT – TO COMPLY WITH HEALTH AND SAFETY REQUIREMENTS IT IS ESENTIAL THAT THE AIR FLOW AND AIR QUALITY BE FREQUENTLY MONITORED AND RECORDED

WARNING: At higher work rates the inhalation of the user will increase and can cause reduced/negative pressure within the helmet which could be dangerous. Air flow adjustments must always be made to ensure adequate air supply to the user in all conditions – Refer to Table 1 in Setting Up Instructions and increase pressure accordingly

1.4     Place the helmet on the head ensuring that the cape’s inner muffler fits snugly around the neck.

1.5     Readjust the air flow to suit personal preference. The air control valve (21) incorporates a fixed orifice. Therefore the air supply should be adjusted at the breathing air filter to provide a minimum of 170 ltrs/min into the helmet

1.6     Pull the cape down around the chest and connect the elasticated straps under the arms and tighten as required

1.7     Secure the waist belt complete with air control valve over the cape and around the waist. Adjust the fit using the slide adjuster

WARNING: Under NO circumstances must the helmet system be worn without the belt being securely fastened around the waist. Operation without the belt securely fastened can be dangerous

1.8     Ensure that the window frame latch is securely fastened

1.9     When the final replacement window has been frosted a new set should be introduced into the window frame as detailed in Setting Up instructions, Section 3.0

WARNING: Under No circumstances must the helmet be used without the lens system being in place and window frame securely fastened