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B-1
OPERATION
B-1
GENERAL DESCRIPTION
The DC-655 is an energy efficient constant voltage DC power
source that produces outstanding arc characteristics for multi-
ple CV or CC welding processes
Four models are available:
Domestic - all 60 Hertz models except 230/460/575v.
NEMA Class 1 rated
Canadian - 230/460/575v 60 Hertz
NEMA Class 1 rated
European - 50/60 Hertz models “CE” qualified and
rated for IEC 974-1
Export - 50/60 Hertz models NEMA Class 1 rated
RECOMMENDED PROCESSES AND
EQUIPMENT
The DC-655 is designed for CV or CC processes.
CV processes include: GMAW (MIG) and FCAW (flux-
cored) welding, plus the capability of CV submerged
arc welding and air carbon arc gouging. It produces
outstanding welding performance with a single range
full output control knob.
CC processes include stick welding, CC submerged
arc and superior air carbon arc gouging with up to 3/8”
(10 mm) diameter carbons. The same single range full
output control knob is used and paralleling capability
is provided.
The DC-655 is recommended for use with Lincoln’s
DH-10 or LN-10 as well as the LN-7*, LN-7 GMA*,LN-
15, LN-742, LN-8*, LN-9*, LN-9 GMA*, LN-23P and
LN-25 semiautomatic wire feeders. It is also recom-
mended for use with the NA-3, NA-5 and NA-5R auto-
matic feeders. “Cold starting” for sub-arc or across
arc “touch-sensing” can be used.
* The 14-pin MS receptacle on the European mod-
els does not provide 115 VAC for these feeders; 115
VAC must be obtained from terminal strip.
Two DC-655’s may be paralleled in a “master” and
“slave” interconnection using the K1611-1 Paralleling
kit.
DC-655
ELECTRIC SHOCK
can kill.
• Do not touch electrically live parts
or electrode with skin or wet
clothing.
• Insulate yourself from work and
ground.
• Always wear dry insulating
gloves.
FUMES AND GASES
can be dangerous.
• Keep your head out of fumes.
• Use ventilation or exhaust to
remove fumes from breathing
zone.
WELDING SPARKS
can cause fire or
explosion
• Keep flammable material away.
• Do not weld on containers that
have held combustibles.
ARC RAYS
can burn.
• Wear eye, ear and body
protection.
SAFETY PRECAUTIONS
Read and understand this entire section before oper-
ating the machine.
GENERAL WARNINGS
Observe additional Safety Guidelines detailed
throughout this manual.
WARNING