B-32
OPERATION
POWER FEED™ 25M NNS
COLD FEED/GAS PURGE SWITCH
ColdFeedandGasPurgearecom-
binedintoaRockerswitch.
ToactivateColdFeeding,pushand
holdtheRockerswitchintheUP
position.Thewiredrivewillfeed
electrodebutneitherthepower
sourcenorthegassolenoidwillbe
energized.Adjustthespeedofcold
feedingbyrotatingtheWFSknob.Coldfeeding,or
"coldinching"theelectrodeisusefulforthreadingthe
electrodethroughthegun.
PushtheRockerswitchinthe
DOWN
positiontoacti-
vateGasPurgeandlettheshieldinggasflow.The
gassolenoidvalvewillenergizebutneitherthepower
sourceoutputnorthedrivemotorwillbeturnedon.
LIGHT SWITCH
PushthelightRockerswitchtoillumi-
natetheinsideofthePOWERFEED™
25MNNS
HEATER SWITCH
PushtheheaterswitchONtowarmthe
insideofthePOWERFEED™25MNNS.
Theheaterisusefulforreducingcondensa-
tionbuild-uponthespoolofwire.
G
7
9
3
7
-2
V
M
C OLD
FEED
G AS
PURGE
LIGHTS
HEATER
ON
OFF
ON
OFF
COLD FEED/GAS PURGE
ROCKER SWITCH
LIGHT
ROCKER SWITCH
HEATER
ROCKER SWITCH
G
7
9
3
7
-2
V
M
C OLD
FEED
G AS
PURGE
LIGHTS
HEATER
ON
OFF
ON
OFF
COLD FEED/GAS PURGE
ROCKER SWITCH
LIGHT
ROCKER SWITCH
HEATER
ROCKER SWITCH
G
7
9
3
7
-2
V
M
C OLD
FEED
G AS
PURGE
LIGHTS
HEATER
ON
OFF
ON
OFF
COLD FEED/GAS PURGE
ROCKER SWITCH
LIGHT
ROCKER SWITCH
HEATER
ROCKER SWITCH
PRESSURE ARM ADJUSTMENT
ELECTRIC SHOCK can kill.
• Turn the input power OFF at the weld-
ing power source before installation or
changing drive rolls and/or guides.
• Do not touch electrically live parts.
• When inching with the gun trigger, electrode
and drive mechanism are "hot" to work and
ground and could remain energized several sec-
onds after the gun trigger is released.
• Do not operate with covers, panels or guards
removed or open
• Only qualified personnel should perform mainte-
nance work.
------------------------------------------------------------------------
Thepressurearmcontrolstheamountofforcethedrive
rollsexertonthewire.Properadjustmentofpressure
armgivesthebestweldingperformance.
Setthepressurearmasfollows(SeeFigureB.18):
Aluminumwires
between1and2
Coredwires
between2and3
Steel,Stainlesswires
between3and5
FIGURE B.18
6
1
3 2
5 4
FCAW
FCAW
GMAW
GMAW
AL
AL