Arc Machines 227 - Manual (Page 21)

MODEL 227
OPERATION MANUAL
Doc # 740063 Rev E
SECTION III - INSTALLATION
3.2 WELDING GAS CONNECTIONS
CAUTION
The M-227 arc gas solenoid valve is rated at 50 PSI (345KPa) maximum
pressure, DO NOT EXCEED THIS RATING.
3. No I.D. Purge line is provided, but most GTAW welds will require the inside
be purged with Argon. Most piping situations will require I.D. purging from
sources and entry points a long distance from the M-227, so no outlet or
monitoring is provided. However, be sure to provide an I.D. purge if the
weld procedure requires it.
3.3 ADAPTER CABLE TO M-227 INSTALLATION
The M-227 comes standard with a 40 ft Pipe Weld Head Adapter Cable. This will be
used for most Weld Heads. However, some Weld Heads will use a different Adapter
Cable or additional cables. The correct cables required should be resolved at the time
of order. The following section refers mainly to the connection of the Pipe Weld
Adapter Cable.
NOTE
The Pipe Weld Head Adapter Cable consists of a 40 ft Control Adapter Cable and a
40 ft Service Adapter Cable. The two cables are not tied together as a unit.
WARNING
Always turn the power supply off before making any cable or connection changes to
the M-227 power supply.
1. One end of an adapter cable ALWAYS connects to the weld head. The
other end connects to the M-227 or to a weld head extension cable. The
connector types and keyways are different for each item (except gas).
Use the following steps for connection to the M-227 (see figure 2 and 4).
2. Connect the Service Adapter ELECTRODE connector to its respective
terminal on the M-227. Align the keyway, push in and twist clockwise until
fully locked.
3. Weld head CONTROL connector - Just before installing, unscrew the dust
caps on the electrical connectors on the cable and M-227. Insert the multi-
pin electrical connector into the M-227. Insert the multi-pin electrical
connector into the M-227 connector labeled PIPE WELD HEAD
CONTROL. Note the positioning keyway and NEVER FORCE or use tools
on the cable connections. Hand tighten the connecting ring after the pins are
firmly seated.
3.3