Tyco 5 manual Replacing the exhalation valve, Replacing the pivot arms, Replacing the brim trim

5

Replacing the exhalation valve

•Pull the valve cover from the valve and remove the disc.

•Insert a new disc ensuring that it lies flat on the seat.

•Align the valve cover with the slots and snap it in its place.

Replacing the pivot arms

•Use side clip to release pivot arm and withdraw arm from pivot post. Slide new pivot arm into pivot post and secure with side clip.

Replacing the brim trim

•Release the elastic loops from the head harness. Untie the retaining cord of the old brim trim and remove it from the helmet.

•Locate the rectangular slots in the new brim trim over the airducts at the front of the helmet, arrange the brim trim around the brim of the helmet with the sponge pads tucked under the helmet brim. Tie the retaining cord.

Replacing the head harness

•Tilt the visor to the fully-up position. By using both thumbs, press down on the white retaining tabs to release the head harness from the helmet.

•When mounting, insert the white retaining tabs into the slots in the rim of the helmet, and press down until they clik into place.

•Tilt the visor to the required position.

Replacing the sweatband

•Pull the old sweatband from the head harness hooks.

•Fit the new sweatband onto the four hooks in the lower front of the headband, fold across the headband, then clip on to the two hooks at the top of the headband.

5.Selection of blower-assisted breathing protector equipped with filter See Instructions for Use of the blower device to be used.

Type of protective device		APF			Remarks, limitations
		(Assigned protection factor)
		Values as given		Values as given
		in BS 4275		in German BGR
				190 - ZH1/701	“Open” facepieces, such as helmets
Power-assisted face shield with
particle filter					or hoods, do not provide sufficient
TH1P	10		5		protection in case of breakdown or
TH2P (Flowhood 5)	20		20		inferior output of the blower.
TH3P	40		100		Therefore, devices of class TH1 must
					never be used against carcinogenic,
					very poisonous or radioactive gases
					and vapours.
Device with combined filter	The specified multiples of threshold value for the gas or particle filters are
	given separately, but in all cases the lowest value applies.
Power-assisted face shield with					For devices with combined filter apply
gas filter *)					the relevant limitations of gas and
TH1 gas filter class 1 or 2	10		5		particle filters.
TH2 gas filter class 1 or 2	20		20
TH3 gas filter class 1 or 2	40		100

*) Provided that the maximum permissible detrimental gas concentration for the gas filter is not exceeded. For power-assisted filtering devices with gas filter, concentration must not exceed 0.05 vol.% in gas filter class 1 and 0.1 vol.% in gas filter class 2 and 0.5 vol.% in gas filter class 3.