Replacing The Filters; Caution; Dust Filter (See Figure 8-2 And Table 8-2); Water Filter - MSA Orion Mode D'emploi

Chapter 6, Warranty, Maintenance and Troubleshooting

Replacing the Filters

When replacing external dust and water filters, prevent any
dust or dirt around the filter housing from entering the pump
housing. Dust or dirt in the pump unit may impede pump
operation.

Dust Filter (see FIGURE 8-2 and TABLE 8-2)

1. Remove the four screws (24) from the clear filter housing (23)
on the back of the instrument.
2. Remove the fibrous dust filter (21) from the recess on the
filter housing.
3. Carefully install the new dust filter in the filter housing recess.
4. Re-install the filter housing.

Water Filter

1. Remove the four screws (24) from the clear filter housing (23)
on the back of the instrument.
2. Carefully lift out the O-ring (26) and white plastic filter (20)
resting in the filter housing.
3. Carefully install the new water filter in the filter housing recess.
NOTE: When replacing the filter, carefully handle the new
filter by the edges only, as it is easily torn. Install the
filters in the correct order.
4. Replace the O-ring, being sure to press gently down on top of
the water filter.
5. Replace the cover and screws.

Internal "Firewall" Filter

The pumped version of the Orion Multigas Detector contains an
internal "firewall" filter. This filter forms a final barrier against any
dust that enters the pump assembly when external filters are
replaced. The "firewall" filter is provided as a final safety
precaution and should rarely, if ever, require replacement.
1. Turn OFF the power.
2. Remove the battery pack from the instrument by removing the
bottom two screws on the back of the case.
6-4

" CAUTION

(see FIGURES 8-1 and 8-2 and TABLE 8-2)
Operating Manual