Tweco 3000 Merlin User Manual
Page 42

OPERATION
4-10
Manual 0-2532
Auto-Restart
Mode
SW2-1
Position
SW2-2
Position
Normal *
0 (Off)
0 (Off)
Delayed
0 (Off)
1 (On)
Delayed
1 (On)
0 (Off)
Delayed
1 (On)
1 (On)
* = Factory Setting
C. Gas Pre-Flow Delay (SW3)
ON
OFF
1 2
SW3
A-00993
Logic PC Board
Figure 4-10 Gas Pre-Flow Delay Switch SW3
Location
The pre-flow delay allows time for gases to flow to
the torch when the torch is activated. Pre-flow is im-
mediately followed by pilot arc initiation. Pre-flow is
factory-set at 2 seconds, but can be reset to 4, 7, or
10 seconds as desired. Extended torch leads may
require longer pre-flow durations.
Pre-Flow Time
(Seconds)
SW3-1
Position
SW3-2
Position
2 *
0 (Off)
0 (Off)
4
0 (Off)
1 (On)
7
1 (On)
0 (Off)
10
1 (On)
1 (On)
* = Factory Setting
D. Gas Post-Flow Delay (SW4)
ON
OFF 1 2
SW4
A-00994
Logic PC Board
Figure 4-11 Gas Post-Flow Delay Switch SW4
Location
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