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to proper output terminals on welding power source; ensure that proper polarity is maintained.
ELECTRIC SHOCK can kill.
• Secure and insulate with sleeving any ex- posed cable connections to prevent contact with personnel, equipment, etc.
12.If an Electroslope and/or Pulser is to be installed, see Section
13.Reinstall cover onto
3-8. FIELD INSTALLATION OF OPTIONAL PRE- FLOW TIMER
WARNING: ELECTRIC SHOCK can kill.
• Do not touch live electrical parts.
•Shut down welding power source, and dis- connect input power employing lockout/tagging procedure before beginning this installation.
Lockout/tagging procedures consist of pad- locking line disconnect switch in open position, removing fuses from fuse box, or shutting off and
IMPORTANT: All directions, such as left or right, are with respect to the operator facing the welding power source front panel. Retain all hardware removed during this procedure for re- installation.
A. Mechanical Installation (Figure 3-3)
1. Remove
CAUTION: METAL FILINGS AND/OR TOOL CONTACT WITH INTERNAL COMPONENTS can damage unit.
•Cover internal components.
•Clean unit, and remove internal covering ma- terial before resuming operation.
2.Mount Preflow ON/OFF switch S200 in the 1/2 in. (12.7 mm) diameter hole using supplied hardware.
3.Mount Preflow Time control with attached printed circuit card assembly TD2 in the 3/8 in. (9.5 mm) di- ameter hole using supplied hardware.
4.Affix supplied PREFLOW TIME label to front panel over both controls.
5.Attach supplied knob to Preflow Time control shaft.
B. Electrical Installation (Figure 3-2)
IMPORTANT: Before preceeding with this installation familiarize yourself with the circuit diagram provided in this manual.
For All Models:
1.Remove and discard jumper lead 70 from terminal 70 on terminal strip 1T and terminal 73 on terminal strip 2T.
2.Connect new lead 70 from the preflow timer assem- bly to terminal 70 on 1T.
3.Connect lead 73 from preflow timer assembly to ter- minal 73 on 2T.
4.Connect lead 33 from preflow timer assembly to ter- minal 33 on 1T.
5.For Models With Electroslope:
a.Disconnect lead 6 from electroslope edge con- nector pin X. Tape and tie off lead 6.
b.Insert new lead 92 into pin X where lead 6 was removed in Step a.
c.Connect new lead 6 from preflow timer assem- bly to terminal 6 on 1T.
6.For Models Without Electroslope: Tape and tie off leads 6 and 92.
7.For Models Effective With Serial No. JA373511:
a.Remove jumper link 6 from terminals 58 and 59 on terminal strip 1T
b.Connect lead 32 from preflow timer assembly to terminal 32 on 1T.
c.Connect new lead 30 from preflow timer as- sembly to terminal 30 on 2T.
d.Connect lead 37 from preflow timer assembly to terminal 37 on 2T.
e.Connect lead 59 from preflow timer assembly to terminal 59 on 1T.