Arc Machines 205 WDR - Manual (Page 16)

M O D E L 2 0 5
O P E R A T O R ’ S M A N U A L
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3. The arc gas is controlled by a solenoid and flow sensor in the Model 205. Attach the
input gas line to ARC GAS INPUT fitting on the Model 205, NOT DIRECTLY TO
THE WELDHEAD.
4. Attach the other end of the input gas hose to the gas regulator/flow meter. Fitting it
loosely by hand, tighten the nut slightly with a wrench to ensure there are no leaks.
DO NOT OVER TIGHTEN. The use of plumbers tape or grease is NOT
RECOMMENDED.
The Model 205 arc gas solenoid valve is rated at 50 PSI (345 kPa) maximum
pressure, DO NOT EXCEED THIS RATING.
3.5 MODEL 205 TO M8 / M9 WELDHEAD HOOK UP
Always turn the power supply off before making any cable or connection
changes to the power supply.
Non-liquid-cooled weldheads (Models 9-250 and 9-500) connect directly to the Model
205. Liquid-cooled weldheads connect to the Model 205 via a short pig-tail or via an
adapter cable. If needed an extension cable can be used. The extension cable
connects to the Model 205, then to the weldhead for non liquid-cooled weldheads or to
the adapter cable for liquid-cooled weldheads.
Pig-tail Connections
1. Connect the ground and electrode brass quick-disconnect fittings on the pig-tail to
the mating fittings on the weldhead. Pull the knurled ring on the female fitting back
and fully insert the male fitting. These connectors are fully seated when the ring will
spring back to its original position. Slide the rubber boots together and secure them
in place, being careful not to dislodge the connectors. Male boots should cover the
connection first. The boots protect the connectors and prevent shorting to ground.
2. Attach the ground and electrode connectors on the pig-tail to their respective
GROUND(+) and ELECTRODE(-) terminals on the Model 205. Align the
keyways, push in and turn clockwise until fully locked.