ESAB MIGMASTER 250 Bedienerhandbuch PDF herunterladen (Seite 27)

SECTION 3 INSTALLATION

E. Attach the regulator to the cylinder valve, tighten the union nut securely

with a 1-1/8in. open end or an adjustable wrench.

F. Attach the gas hose from the rear of the Migmaster 250 Plus to the

regulator outlet connection (see Fig. 3.14).

G. Slowly open the cylinder valve a fraction of a turn. When the regulator

pressure gauge pointer stops moving, open the cylinder valve fully.

H. Using a leak test solution, such as P/N 998771 (8 oz. container) or

soapy water, test for leakage about the cylinder valve stem, the

regulator inlet connection, and the hose connections at the regulator

and at the Migmaster 250 Plus for leakage. Correct any leaks before

starting work.

I. If work is to be stopped for a half-hour or more, or the regulator is to be

removed from the cylinder, shut down the regulator as follows:

a. Close the cylinder valve.

b. Release gas from the regulator by closing the torch trigger lever.

c. When pressure gauge drops to zero, the regulator is de-pressur-

ized and shutdown.

J. Each regulator is equipped with a porous metal inlet filter, P/N 71Z33,

pressed into the regulator inlet nipple. No regulator should be con-

nected to a cylinder or station valve unless it contains this filter. You can

replace the filter if you have reason to do so. To remove a filter refer to

the regulator instruction literature for details.

K. Regulators in need of repair should be returned to your Welding

Equipment distributor or to an authorized Remanufacturing Center.

3.11 WELDING CABLE CONNECTIONS

Connect the work clamp solidly to the workpiece or work table. Clamp onto a

bare metal area.

Welding cables should be kept as short as possible and be of adequate current

carrying capacity. Resistance of the welding cables and connections causes a

voltage drop which is added to the voltage drop of the arc. Excessive cable

resistance may result in a reduction of the maximum usable current output of the

equipment.

The proper operation of this equipment is to a large extent dependent on the use

of welding cables and connections which are in good condition and of adequate

size.

OUTLET

CONNECTION

CYLINDER

PRESSURE

GAUGE

CYLINDER

VALVE

If welding is performed in a confined

area, shielding gas leaks could result in

a buildup of shielding gas concentra-

tion, displacing oxygen, thereby endan-

gering personnel entering the area.

A good electrical connection to the work

is essential to proper welding operation

and to prevent electric shock.

Figure 3.14 R-33-FM-580 Regulator

For R-33-FM-320 Flowmaster be sure to

install fiber washer between union nut

and cylinder valve seat.

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