Profax MHC-3 User Manual
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Owner’s Manual
00110OG011905
MHC-3 & MHC-3GD34A
REMOTE AMPERAGE CONTROLS
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FOR MILLER WELDING POWER SOURCES
Note: Please read and understand the entire contents of this manual, with direct attention on the safety
material throughout this manual. This manual was intended for use by trained and qualified persons
to install, operate and/or service this unit. DO NOT allow untrained personnel to install, operate or
service this unit. Call your welding supply distributor if you do not fully understand these instructions.
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SAFETY
WARNING! Read and understand all safety messages in this and the welding power source owner's manual.
ELECTRIC SHOCK can kill.
• Do not touch live electrical parts
• Keep all panels in place.
• Keep yourself insulated from the work
WELDING can cause fire and explosion.
• Do not weld on closed containers.
• Watch for fire
WARRANTY
LIMITED WARRANTY - Subject to the terms and conditions hereof,
PROFAX, Pearland, TX warrants it's products to be free from defects in
workmanship and material at the time of delivery by PROFAX.
PROFAX will honor warranty claims on products as a result of failure from
a defect for a time period as listed below for the particular product line,
from date of sale to the original user.
Consumable products manufacturered by PROFAX......................... 30 Days
Resale consumable products.................... Original Manufacturer's Warranty
Mig Guns, Flux Cored Guns, Spool Guns........................................ 90 Days
Arc Gouging Torches, Plasma, Tig Torches & CO2Heaters.............. 90 Days
Remote Fingertip, Hand/Foot Controls............................................ 90 Days
Voltage Controls & Spool Guns...................................................... 90 Days
Spool Gun Controls....................................................................... 1 Year
Welding Power Sources & Wire Feeders......................................... 3 Year
Shelf Life Before WARRANTY Starts ........................................... 1 Year
Upon return of the merchandise at user's expense, PROFAX reserves the
right to either repair or replace as necessary.
This is the only warranty either expressed or implied covering
PROFAX products.
SMOKE, FUMES AND GASES can be
hazardous to your health.
• Keep head away from fumes and smoke.
• Ventilate work area
DIMENSIONS
D
W
HEIGHT 9 in. (229 mm )
WIDTH 7 in. (178 mm )
DEPTH 8 in. (203 mm )
ARC RAYS can burn eyes and skin.
• Wear correct body protection
• Wear welding helmet with filter.
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INSTALLATION
WARNING! Electric Shock can kill.
• Do not touch live electrical parts.
• Shut off welding power source and disconnect all electrical power.
• Shut off engine before making electrical connections.
• Keep all panels securely in place.
CAUTION! Incorrect installation can damage unit.
• Double check installation instructions
1. Turn off welding power source or stop engine on welding generator.
2. TWISTLOCK PLUG:
• Make connection by aligning plug to mating receptacle on power source, inserting plug into the receptacle
and turning clockwise as far as it will go.
3. If the power source has a Contactor Switch - place it into the STANDARD or PANEL position.
4. If the power source has a Current or Voltage control switch - place it in the REMOTE position.
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