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120 V DUPLEX RECEPTACLES
The 120V auxiliary power receptacles should only be
used with three wire grounded type plugs or approved
double insulated tools with two wire plugs.
The current rating of any plug used with the system
must be at least equal to the current load through the
associated receptacle.
MOTOR STARTING
Most 1.5 hp AC single phase motors can be started if
there is no load on the motor or other load connected
to the machine, since the full load current rating of a
1.5 hp motor is approximately 20 amperes (10
amperes for 240 volt motors). The motor may be run
at full load when plugged into only one side of the
duplex receptacle. Larger motors through 2 hp can be
run provided the receptacle rating as previously stated
is not exceeded. This may necessitate 240V operation
only.
GND
120 V
120 V*
240 V
*Current Sensing for Automatic Idle.
(Receptacle viewed from front of Machine)
GND
120 V
120 V*
240 V
*Current Sensing for Automatic Idle.
(Receptacle viewed from front of Machine)
WELDMARK 225 Extension Cord Length Recommendations
(Use the shortest length extension cord possible sized per the following table.)
Current
(Amps)
15
20
15
20
38
Voltage
Volts
120
120
240
240
240
Load
(Watts)
1800
2400
3600
4800
9000
30
60
(9)
(18)
40
30
75
60
(12)
(9)
(23)
(18)
75
50
150
100
50
(23)
(15)
(46)
(30)
(15)
125
88
225
175
90
(38)
(27)
(69)
(53)
(27)
175
138
350
275
150
(53)
(42)
(107)
(84)
(46)
300
225
600
450
225
(91)
(69)
(183)
(137)
(69)
Maximum Allowable Cord Length in ft. (m) for Conductor Size
Conductor size is based on maximum 2.0% voltage drop.
14 AWG 12 AWG 10 AWG 8 AWG 6 AWG 4 AWG
A-6
INSTALLATION
A-6
WELDER OPERATION
WELDER OUTPUT
• Maximum Open Circuit Voltage at 3700 RPM is
80 Volts RMS.
• Duty Cycle is the percentage of time the load is
being applied in a 10 minute period. For example, a
60% duty cycle represents 6 minutes of load and 4
minutes of no load in a 10 minute period. Duty
Cycle for the WELDMARK 225 is 100%.
AUXILIARY POWER
The WELDMARK 225 can provide up to 9,000 watts
of 120/240 volts AC, single phase 60Hz power for
continuous use, and up to 10,500 watts of 120/240
volts AC, single phase 60Hz power peak use. The
front of the machine includes three receptacles for
connecting the AC power plugs; one 50 amp 120/240
volt NEMA 14-50R receptacle and two 20 amp 120
volt NEMA 5-20R receptacles. Output voltage is with-
in +/-10% at all loads up to rated capacity. All auxiliary
power is protected by circuit breakers. All auxiliary
power is protected by circuit breakers.
Do not connect any plugs that connect to the
power receptacles in parallel.
-----------------------------------------------------------------------
Start the engine and set the “IDLER” control switch to
the desired operating mode. Set the “CONTROL” to
10. Voltage is now correct at the receptacles for auxil-
iary power.
WELDMARK 225
Constant Current 225 Amps AC @ 25 Volts
210 Amps DC @ 25 Volts
Constant Voltage 200 Amps DC @ 20 Volts
CAUTION
WELDMARK 225
120/240 VOLT DUAL VOLTAGE RECEPTACLE
The 120/240 volt receptacle can supply up to 38 amps
of 240 volt power to a two wire circuit, up to 38 amps
of 120 volts power from each side of a three wire cir-
cuit (up to 76 amps total). Do not connect the 120 volt
circuits in parallel. Current sensing for the automatic
idle feature is only in one leg of the three wire circuit
as shown in the following column.