04 preparations for operating – Tweco FP-55 User Manual

Page 24

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OPERATION

4-2

Manual 0-2846

5.

TEMP Indicator

Normally OFF. Yellow indicator will come ON when the
internal temperature sensors detect temperatures above
normal limits. The unit should be allowed to cool before
continuing operation.

6.

GAS Indicator

Green indicator will come ON when the input gas pressure
is set to

35 psi (2.4 bar) or higher. Indicator will be OFF

when the pressure falls below 35 psi (2.4 bar).

7.

DC Indicator

Green indicator will come ON while the torch switch is
pressed. Indicates DC output circuit is active.

C. Rear Panel

1. Gas Input Port

Input connection for compressed air input.

WARNING

This unit is not to be used with oxygen (O

2

).

A-02790

1

2

3

Figure 4-3a Rear Panel (units with type A

Regulator/Filter)

A-03042

1

2

3

Figure 4-3b Rear Panel (units with type B Regulator/

Filter)

2. Primary Input Power Cable/Strain Relief

Factory installed primary input power cable strain relief for
the primary power cable, capable of handling the input volt-
age designed for this unit.

3. Gas Pressure Regulator/Filter Assembly

Pressure regulator to adjust the input gas pressure to the
Power Supply. The pressure regulator has its own built-in
air line filter.

Factory installed.

For improved filtering, other

filtering packages are available as options.

4.04 Preparations For Operating

This procedure should be followed at the beginning of each
shift:

WARNING

Disconnect primary power at the source before
assembling or disassembling power supply, torch
parts, or torch and leads assemblies.

A. Torch Parts Selection

Check the torch for proper assembly and appropriate
front end torch parts. Refer to the torch manual for
proper parts selection.

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