Lincoln Na5 Service Manual

MECHANICAL
INSTALLATION
ELECTRIC SHOCK
can kill.
• Turn off input power to the welding power source
using the disconnect
switch before working on
this equipment.
INTRODUCTION
This section covers the basic requirements to
install the control box and welding head
shown in Figure A.1. This section will give
you mounting hole alignments, component
mounting clearances, and any special
instructions or precautions that must be fol-
lowed when installing the control box and
mounting head.
CONTROL BOX...

To install the control box on a fixture,
perform the following steps and refer to
Figure A.3.1. Align the mounting holes on the back and/or bottom of the control box with
the holes you put in the fixture
according to the measurements
provided in Figure A.3.
2. Secure the control box to the fixture using lock washers and hex head
screws at each of the mounting holes.  WELDING HEAD INSTALLATION
The welding head can be mounted either
with the standard head mounting hardware
or with the horizontal head...

INSTALLATIONA-6A-6
NA-5
When mounting the welding head to the
standard travel carriage, (see 305-B sec.
T2.2.4) mount it so only a minimum of
overhang weight exists. Mount the head so
it stays within the dimension shown in Figure
A.5.
ELECTRICAL
INSTALLATION
ELECTRIC SHOCK
can kill.• Do not touch electrically live parts such as output
terminals or internal
wiring.
This section  provides information on proper 
wiring  procedures  for the NA-5 welding sys-
tem.  This section  also  provides  basic con-...

The “F” models do not include the 4 ft (1.2
m) lengths of electrode cable as standard.
If you are not using a K335 or K338 exten-
sion cable for the NA-5NF or NA-5SF, order
an appropriate length of the needed elec-
trode cable.  Connect it between the wire
contact assembly and the control cable
assembly as described above. 
POWER SUPPLY TO CONTROL
BOX CONNECTIONS
At the NA-5 control box, in order to activate
the NA-5 weld current sensing switch, the
electrode cables of the control cable
assembly must be...

INSTALLATIONA-8A-8
NA-5
ELECTRODE POLARITY
ELECTRIC SHOCK
can kill.• Turn off input power to the welding power
source using the
disconnect switch
before working on this
equipment.
Polarity is changed at the power source. 
The polarity of the NA-5 control circuit is
shipped connected for electrode positive.  If
electrode negative is required, two leads
inside the NA-5 control must be reversed.
Proceed as follows:  1. Turn off the input power to the NA-5 control box by turning off the welding
power...

INSTALLATIONA-9A-9
NA-5
FIGURE A.8 – CONNECTION OF NA-5 (ALL) TO A DC-600.     
N.A.	 ON EARLIER DC-600S, #67 TERMINAL WAS ALSO ON THE TERMINAL STRIP.
N.B.	 WELDING CABLES MUST BE OF PROPER CAPACITY FOR THE CURRENT AND DUTY CYCLE\
 OF IMMEDIATE AND FUTURE APPLICATIONS.
N.C.	 EXTEND LEAD #21 USING #14 OR LARGER INSULATED WIRE PHYSICALLY SUITABLE F\
OR THE INSTALLATION. AN S-16586 - [ ] REMOTE VOLTAGE SENSING WORK 
	 LEAD IS AVAILABLE FOR THIS  PURPOSE. CONNECT IT DIRECTLY TO THE WORK PIE\
CE KEEPING IT...

INSTALLATIONA-10A-10
NA-5
FIGURE A.9 – CONNECTION OF NA-5 (ALL) TO A DC-650 PRO 
NOTE:  ABOVE DIAGRAMS SHOW ELECTRODE CONNECTED POSITIVE.  TO CHANGE POLA\
RITY, TURN POWER OFF, REVERSE THE ELECTRODE 
	 AND WORK CABLES AT THE POWER SOURCE AND POSITION THE SWITCH ON THE POWER\
 SOURCE TO PROPER POLARITY.  REFER TO 
	 NA-5 OPERATING MANUAL FOR REQUIRED NA-5 CONTROL BOX POLARITY CONNECTIONS\
.
DC650 PRO POWER SOURCE SETTINGS
1.	 TURN OFF INPUT POWER.
2.	 CONNECT ELECTRODE CABLES TO TERMINALS OF DESIRED...

INSTALLATIONA-11A-11
NA-5
FIGURE A.10 – CONNECTION OF NA-5 (ALL) TO A R3S-400, -600, OR -800WITH NO LINE VOLTAGE COMPENSATOR (OBSOLETE).
R3S POWER SOURCE SETTINGS
TURN POWER SOURCE OFF.

FOR ALL PROCESSES:
1.	 CONNECT ELECTRODE CABLE TO TERMINAL OF DESIRED POLARITY.
2.	 SET THE POLARITY SWITCH TO THE SAME POLARITY AS THE ELECTRODE
	  CABLE CONNECTION.
3.	 SET TOGGLE SWITCH TO REMOTE.
4.	 INSTALL VOLTAGE TRIANGLE IN A POSITION AS CLOSE AS POSSIBLE TO 
	 THE DESIRED ARC VOLTAGE. NA-5 SETTINGS
FOR...

INSTALLATIONA-12A-12
NA-5
FIGURE A.11 – CONNECTION OF NA-5 (ALL) TO A SAM-400 MOTORGENERATOR OR ENGINE WELDER. 
NOTE:	 TO CHANGE POLARITY, TURN POWER OFF, AND POSITION THE SWITCH ON POWER SOU\
RCE TO PROPER POLARITY.  REFER TO NA-5 OPERATING MANUAL FOR
	  REQUIRED NA-5 CONTROL BOX POLARITY CONNECTIONS.

N.A.	 REMOVE SAM PORTABLE FIELD CONTROL AND CONNECT NA-5 CONTROL CABLE.
N.B.	 WELDING CABLES MUST BE OF PROPER CAPACITY FOR THE CURRENT AND DUTY CYCLE\
 OF IMMEDIATE AND FUTURE APPLICATIONS.
N.C....

INSTALLATIONA-13A-13
NA-5
FIGURE A.12 – CONNECTION OF NA-5 (ALL) TO A SAM-650 ENGINE WELDER. 
NOTE:	 TO CHANGE POLARITY, TURN POWER OFF, AND
	 POSITION THE SWITCH ON POWER SOURCE TO 
	 PROPER POLARITY.  REFER TO NA-5 
	 OPERATING MANUAL FOR REQUIRED 
	 NA-5 CONTROL BOX  POLARITY CONNECTIONS.

FOR ADDITIONAL INSTALLATION INSTRUCTIONS, SEE NA-5 OPERATING MANUAL.
SAM  POWER SOURCE SETTINGS

FOR SUB ARC:
1.	 SET THE ELECTRODE POLARITY SWITCH TO THE POLARITY DESIRED FOR THE
	  PROCESS BEING USED....