www.esabna.com
DATE: June 29, 2004 BULLETIN NO: P_04_011
TITLE/ PRODUCT NAME: EPP-200 Flow Switch Change
RATING:
_
X_ DIRECTIVE _ X _ ALERT
(Action is Required) (Potential Problem)
_ _ INFORMATION _
_ PRODUCT IMPROVEMENT
(Action is Optional) (Enhanced Product)
_
X_ General Distribution _ _ Business Confidential
(Unrestricted) (Restricted Distribution)
PRODUCT SERIES/ MODEL:
EPP-200 plasma Consoles (05580004315)
SERIAL NO:
Consoles manufactured prior to June 20, 2004 with the following serial numbers:
PORJ409004 PORJ414001 PORJ414002 PORJ416153
PORJ416154 PORJ417127 PORJ417128 PORJ418138
PORJ418139 PORJ420006 PORJ420007 PORJ421002
PORJ421003 PORJ421004 PORJ422063 PORJ422064
PORJ424001 PORJ424105 PORJ424106 PORJ424107
SUMMARY:
Initial EPP-200 power sources contained coolant flow switches with marginally high thresholds. In
rare cases, this could cause nuisance low flow errors. An upgrade has been made to lower this
threshold while still providing adequate torch protection.
OPERATIONAL IMPACT:
None expected.
PT-24 typically exhibits a coolant flow rate above the 0.5 GPM threshold and should not trip the
switch. The typical flow switch threshold is 0.25 GPM for protection of the PT-24 torch. The 0.5
GPM switch adds extra safety margin for torch protection but occasional episodes of low coolant
pressure or flow restrictions could cause nuisance errors of the EPP-200 system even though the
coolant flow is still adequate for torch protection.
ACTION:
It is highly recommended that you identify the flow switch in your EPP 200 console. There is
no action required if no nuisance coolant errors or EPP-200 shut downs have been experienced.
I f you wish to replace the flow switch, order the alternate part number and replace it using the
following procedure.
1. Turn “Off” or disconnect all power to the EPP-200 power source.
2. Remove the right side of the EPP-200 power source.
3. Identify the type of flow switch (lower middle section) in your unit by comparing it with the
photos below.
4. Disconnect the coolant hoses.
5. Disconnect the wire connectors.
6. Remove the two mounting screws.
7. Install new flow switch in reverse order
Flow Switch 0.5 GPM Switch Flow Switch 0.25 GPM Switch
PN- 952230 (switch only – no fittings) PN - 0558004798 (switch with fittings)
PN – 8950001 (switch only – no fittings)
CONTACT:
ESAB Welding & Cutting Products
Product & Service Information Group
843-664-4416 Phone
843-664-5539 FAX
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