Lincoln Electric CV ADAPTER IM309-D - Manual (Page 15)

B-6 INSTALLATION
CV ADAPTER
B-6
POLARITY OF THE STANDARD OUTPUT TERMI-
NALS MUST BE AS STATED IN STEP 14 AND THE
MAXIMUM OPEN CIRCUIT VOLTAGE WITH THE
LOWER MODE SWITCH IN CV POSITION MUST
BE AS STATED IN STEP 15 BEFORE PLACING
THE UPPER MODE SWITCH IN CV POSITION.
FAILURE TO HAVE THE CORRECT POLARITY
AND VOLTAGE BEFORE PLACING THE UPPER
MODE SWITCH IN CV POSITION WILL RESULT IN
DAMAGE TO THE CV ADAPTER.
14. To check the VV output, place both CV/VV switch-
es on the CV Adapter in the “VV” position. If welder
has remote control, set remote control switch to
local position. Start the SA-250 and place idler
control in “high” position. Use a DC voltmeter
across the standard output terminals to check the
output polarity. If it is incorrect, recheck Steps 4
through 12. Open circuit voltage should be about
43-53 volts DC when the Fine Current Adjustment
is set to minimum and 93-100 volts DC when set at
maximum. These voltages may be higher if read-
ings are taken when welder is cold.
15. To check the CV output, place only the lower
switch in the “CV” position. This may be done while
the engine is running as long as no welding is
being done. Voltage between the positive output
terminal and the CV output terminal should be 7-12
volts when the CV Adapter voltage control is at
minimum setting and 36-48 volts at maximum set-
ting.
16. If output varies greatly from that specified in Steps 14
and 15, check wiring. If this does not solve problem,
refer to Troubleshooting Section of manual.
K384 CV ADAPTER TO SA-250 ENGINE
WELDER WITH DC AUXILIARY OUTPUT
NOTE: Before installing CV Adapter, start engine welder
and use a DC voltmeter to check the polarity of the red
and black leads connected to the auxiliary power recep-
tacle. The red lead should be negative and the black lead
should be positive. If the polarity is not correct, refer to
engine welder operating manual for instructions to flash
the exciter to obtain the correct polarity.
• TURN THE ENGINE OFF WHILE INSTALLING THIS
ACCESSORY.
• KEEP HANDS, HAIR, CLOTHING AND TOOLS
AWAY FROM MOVING PARTS WHEN STARTING
OR OPERATING ENGINE.
1. Remove roof assembly and bracket cover (cover on
top and at rear of generator).
2. Drill two holes in fuel tank rail opposite output termi-
nals as in Figure 8, if holes are not in unit.
3. Mount CV Adapter (unit with “SA” above code num-
ber) to the support holes. Use the one stud on the
Adapter case, a spacer, lockwasher, and nut on one
end and 3/8-16 x 1 hex head bolt and hardware on
the other end as shown in Figure 9. In mounting the
unit, be sure the fuel line and choke cable are not
pinched.
WARNING
CAUTION
FIGURE 7 – View of Negative Generator Brushholder after Bracket Cover is Removed.