Miller XMT 450 CV Manuale d'uso - Pagina 25
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5-7.
Optional Gas Valve Operation And Shielding Gas Connection
Obtain gas cylinder and chain to running
gear, wall, or other stationary support so cyl-
4
inder cannot fall and break off valve.
1 Cylinder
2 Regulator/Flowmeter
2
Install so face is vertical.
3 Gas Hose Connection
Fitting has 5/8-18 right-hand threads. Obtain
and install gas hose.
4 Gas In Fitting
5 Gas Out Fitting
The Gas In and Gas Out fittings have 5/8-18
right-hand threads. Obtain proper size, type,
and length hose and make connections as
follows:
Connect hose from shielding gas supply reg-
ulator/flowmeter to Gas In fitting.
1
3
Connect hose coupler to torch. Connect one
end of gas hose to hose coupler. Connect re-
maining end of gas hose to Gas Out fitting.
Operation
The gas solenoid controls gas flow during
the TIG process as follows:
Remote TIG
Gas flow starts with remote contactor on.
Gas flow stops at end of post-flow if current
was detected, or with remote contactor off if
no current was detected.
Lift-Arc
TIG
®
Gas flow starts when tungsten touches work
(touch sensed).
5
Gas flow stops at end of post-flow.
Post-flow time is factory set to 5 seconds
per 100 amps of weld current. The minimum
Ref. 277776-A
post-flow time is 5 seconds. The maximum
post-flow is 20 seconds (post flow settings
are not adjustable by the end user).
OM-292663 Page 21