Arc Machines 217 WDR - Manual (Page 6)

M O D E L 2 1 7 W D R
O P E R A T O R ’ S M A N U A L
2
The Model 217 WDR is intended to be used only with AMI and EXEL by AMI
weld heads for the purpose of GTAW welding of metal tube or pipe. The system is
not to be used for any other purpose, specifically heating or cutting.
The Model 217 WDR is intended for typical GTAW shielding gases ONLY. NEVER
CONNECT OXYGEN OR ACETYLENE to the Model 217 WDR or weld head.
All Power S upplies contain a “bleeder” circuit to ground any residual potential
after welding or after an aborted or bad arc start attempt. These circuits take a few
seconds to operate or could fail.
The electrode should always be considered a possible shock hazard. This is
especially true when the system is in “weld sequence”, ready to weld, is welding or has
just finished welding. Equipment/component failure, system abuse or improper
maintenance could result in electrical potential at the we
ld head even when not in “weld
sequence”.
The users/operators of this equipment must take all precautions necessary to
avoid contact with the ELECTRODE at “ALL TIMES”. The only exception is when
actually replacing or adjusting the electrode and this should be done WITH THE POWER
TURNED OFF.
If performed with the power “ON” the system must be in “TEST” mode out of weld
sequence and the USER MUST OBSERVE COMMON SAFETY PRACTICES such as
grounding the electrode to ensure discharge before actually touching it.
Most AMI Power Supplies feature High Frequency (HF) Arc Starting. This is a High
Voltage/High Frequency electrical transmission process. To eliminate any HF shock
possibility “AVOID ALL CONTACT” with the Welding WORK (ground), the ELECTRODE
or the WELD HEAD during arc start.
Remember, there is a possible shock hazard in all welding power supplies
at ALL times.