Miller Electric DB17V12R, DB1725RDI25, DB1712RDI25 manual Connecting Torch With Two-Piece Cable

B. Connecting Torch With Two-Piece Cable

If applicable, install high-frequency unit. 2

	4	3
Torch Without Gas Valve		1

6

7 5

8 803 314

YTurn Off welding power source power before install- ing torch.

Obtain the following hose:

1Gas Hose With 5/8-18 Right- Hand Fittings

Connections:

2Regulator/Flowmeter

3Gas Cylinder

4Welding Power Source

5Torch Gas-In Hose

6Torch Power Cable

7Work Clamp

Connect work clamp to a clean, paint-free location on workpiece, close to weld area.

Use wire brush to clean weld joint area.

8 Foot Control

Torch With Gas Valve

2

9 Gas Valve

Valve controls gas preflow and

4 −

Tools Needed:

9 6

5/8, 7/8 in

3

postflow. Open valve on torch just before welding.

Preflow is used to purge the imme- diate weld area of atomsphere.

Postflow is required to cool tung- sten and weld, and to prevent con- tamination of tungsten and weld. Af- ter welding, leave valve open about 1 second for every 10 amperes of weld current. Close valve on torch when postflow is finished.

5

7

803 664-A

C. Connecting Torch With Flow-Through Type Connection

If applicable, install high-frequency unit.	2	Y Turn Off welding power
			source power before install-
		3	ing torch.
	4	Obtain the following hose:
		1 Gas Hose With 5/8-18 Right-
Torch Without Gas Valve
			Hand Fittings
	1	Connections:
		2	Regulator/Flowmeter
	5	3	Gas Cylinder
		4	Welding Power Source
6
		5	Gas Valve
		6 One-Piece Torch Cable
		7	Work Clamp
	Tools Needed:	Connect work clamp to clean, paint-
		free location on workpiece, close to
		weld area.

Use wire brush to clean metal at weld joint area.

Ref. ST-802 540-A

5/8, 7/8 in

7

OM-1600 Page 6