Tweco 350 4R Wirefeeder - Manual (Page 31)

4-7 Manual 0-5182
operation weldskill 250, 350
Operation
2. NEVER pressurize a regulator that has loose or damaged parts or is in a questionable condition.
NEVER loosen a connection or attempt to remove any part of a regulator until the gas pressure has
been relieved. Under pressure, gas can dangerously propel a loose part.
3. DO NOT remove the regulator from a cylinder without first closing the cylinder valve and releasing gas
in the regulator high and low pressure chambers.
4. DO NOT use the regulator as a control valve. When downstream equipment is not in use for extended
periods of time, shut off the gas at the cylinder valve and release the gas from the equipment.
5. OPEN the cylinder valve SLOWLY. Close after use.
User Responsibilities
This equipment will perform safely and reliable only when installed, operated and maintained, and repaired in
accordance with the instructions provided. Equipment must be checked periodically and repaired, replaced,
or reset as necessary for continued safe and reliable performance. Defective equipment should not be used.
Parts that are broken, missing, obviously worn, distorted, or contaminated should be replaced immediately.
The user of this equipment will generally have the sole responsibility for any malfunction, which results from
improper use, faulty maintenance, or by repair by anyone other than an accredited repairer.
CAUTION
Match regulator to cylinder. NEVER CONNECT a regulator designed for a particular gas or gases to
a cylinder containing any other gas.
Art: A-05087
Figure 4-4 Fit Regulator to Cylinder
Installation
1. Remove cylinder valve plastic dust seal. Clean the cylinder valve outlet of impurities that may clog
orifices and damage seats before connecting the regulator.
Crack the valve (open then close) momentarily, pointing the outlet away from people and sources of
ignition. Wipe with a clean lintless cloth.
2. Match regulator to cylinder. Before connecting, check that the regulator label and cylinder marking
agree and that the regulator inlet and cylinder outlet match. NEVER CONNECT a regulator designed
for a particular gas or gases to a cylinder containing any other gas.
3. Connect the regulator inlet connection to cylinder or pipeline and tighten it firmly but not excessively,
with a suitable spanner.
4. Connect and tighten the outlet hose firmly and attach down-stream equipment.