ESAB B Series Installation, Operation And Maintenance Manual page 34

SECTION 3
(a) Place the "plasma gas" select switch, SW-2,
in O position.
2
(b) Place the "shield gas" select switch, SW-3,
in O + N position.
2 2
(c) Place the "test switch" SW-1 in START
position.
(d) Open valve NV-3 (start gas valve) and NV-6
(shield gas pre-flow valve) approximately
two full turns.
(e) Check all gas connections on lines 2 and 5
and torch connections in junction box. Close
valves NV-3 (start gas valve) and NV-6
(shield gas pre-flow valve).
(f) Place SW-1 in operate position to verify that
N output pressure on right side of control
2
remains pressurized.
(g) Move switch SW-1 to CUT position.
NV-6
SW-1
NV-1
NV-2
Front View
SW-2
SW-3
NV-3
O Pressure
2
Out
N Pressure
2
Out
Plasma Start
Press. Out
NV-5
NV-4
Figure 3-13. Flow Control Controls
30
INSTALLATION
(h) Open valves NV-1 (oxygen plasma gas valve)
and NV-5 (cut shield gas valve) approxi-
mately two full turns.
(i) Check all gas connections on line 1 and 4.
Recheck torch connections in junction box.
Correct as needed.
(j) Close valves NV-1 (oxygen plasma gas
valve) and NV-5 (cut shield gas valve).
(k) Place SW-1 in operate position to verify that
O output pressure remains pressurized.
2
(l) Place plasma gas select switch SW-2 in N
position.
(m) Open valve NV-2 (nitrogen plasma gas) ap-
proximately two full turns.
(n) Check all gas connections on line 2 for leaks.
Correct as needed.
(o) Place SW-1 in operate position to verify that
N output pressure remains pressurized.
2
PLASMA GAS
O N
2 2
SHIELD GAS
N +ALT
O +N
2
2 2
Left Side View
2