Revision History - ESAB Heliarc 252 Instruction Manual

INSTRUCTION MANUAL CHANGES:
The "A" Edition (9/96) of this manual covers the following changes:
1. The 50Hz units originally designed for single 400V input power now have 220/400V input capability. Input Terminal
Board 36218 was replaced by 32243 (No. 58 in Fig. 6-3).
2. 110V Receptacles 952219 replaced 951033 (No. 18 in Fig. 6-1).
3. Air Core Transformer 36415 replaced 680024 (No. 89 in Fig. 6-4).
4. Capacitors C9 and C10 were added (No. 67 in Fig. 6-3).
The "B" Edition (2/98) of this manual covers the following changes:
1. Added Section 4.1.6, Dip Switch Settings of Main Control Board Assembly (previously covered by an Insert dated
May, 1997).
2. Clarified descriptions on the Contactor switch (S3) in the Operation and Troubleshooting sections.
3. Added S2 connections and J2 pin functions in all schematic diagrams.
4. Spark Gap Assembly, 37246, was made available as a replacement part instead of just individual parts (Fig.6-
3).
5. The Heliarc 252 power sources were equipped with small Fan Motor (13730124) and black plastic 4-bladed Fan
Blade (13730125) up to late 1997. All power sources are now equipped with large Fan Motor (2062334) and
5-bladed metal Fan Blade (36173). The fan blades are not interchangeable but the large motor and fan blade
combination can replace the small motor and fan blade combination.
The "C" Edition (5/99) of this manual covers the following changes:
1. The green/gray equipment originally designed for L-TEC is now obsolete and no longer available.
2. Changed the troubleshooting guide in section 5 to a table format.
3. Added two (2) .02uf 1kv capacitors (C12 & 13) across the S4 switch.
The "D" Edition (5/03) of this manual covers the following changes:
1. Updated the schematic diagrams and updated the format of the manual.
The "E" Edition (3/05) of this manual covers the following changes:
1. Revised gray items in Replacement Parts from "GY" to "M". Added black overlay part numbers.
The "F" Edition (2/06) of this manual covers the following change:
1. Revised Input Terminal Board configuration in Section 2, Installation.

REVISION HISTORY