Before Operations; Assembling The Wand - MSA ORION Manual

Four-Head Gas Detector: MSA Orion
3.3

Before operations

3.3.1

Assembling the wand

To assemble the wand:
a) Dismantle the handle.
b) The water stop should already be fitted. Check that it is tight. If required, twist
the water stop into the connection lug to ensure a tight fit.
c) Fit the metal end of the wand into the water stop. You may need to twist the
wand to ensure an air-tight fit. See
31.
d) Thread the tube through the spring in the other end of the handle.
e) Reassemble the handle.
It may be possible for a nut in the handle of the wand to come loose. This nut
connects the gas sample line from the Orion body to the handle of the extension
probe, and is at the opposite end of the handle to where the water stop is fitted. The
Fire and Rescue NSW has a program of securing these nuts by applying a thread
locker. Until your Orion is fitted with a thread locker, you must check this
connection before use.
a) Unscrew the connector cover on the probe closest to the detector.
D.I. Rec-ommended Practice
FILE: W:\NB\RP HMRU\Orion\Frame Ver 02\Orion.fm
Figure 7 Assembling the sampling wand
Water stop should be
inserted into metal
connection lug
Fit the metal end of the wand into
the water stop
Line up the bayonet fitting, bring the halves
of the handle together, and twist to connect
CAUTION
Always use a water stop filter. This filter protects the internal
workings of the Orion from water and water mist. Without using the
filter, the wand assembly won't be airtight, and the Orion will fail the
pump test.
When stowing the Orion, disassemble the wand and leave the water
stop connected inside the handle for protection.
Tube goes through
the internal spring
Section 4.4.1: 'External water stop' on page
Version 02 Issued February 2011
© Copyright State of NSW (Fire and Rescue NSW) 2011
15