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| INSTALLATION |
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SAFETY PRECAUTIONS |
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| The machine may topple over if this precaution is not | |||||||
Read entire Installation Section before installing | followed. |
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| the Precision Tig 275. |
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| ENVIRONMENTAL RATING |
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| WARNING |
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| Precision TIG 275 power sources carry an IP21S | |||||
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| ELECTRIC SHOCK can kill. | Environmental rating. They are rated for use in damp, | ||||||||
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| dirty |
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| • Only qualified personnel should per- |
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| • Turn the input power OFF | HIGH FREQUENCY INTERFERENCE | ||||||||
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| form this installation. |
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| PROTECTION |
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| fuse box and discharge input capacitors |
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| at the disconnect switch or | The frame of the welder must be grounded. A ground | ||||||||
| • Do not touch electrically hot parts. |
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| before working inside the equipment. | screw marked with the symbol |
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| is located on the | |||||
| • | Always connect the Precision Tig grounding screw (behind |
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| the reconnect panel cover located near the back of the left | input connection panel (Figure A.1) for this purpose. | ||||||||
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| case side) to a good electrical earth ground. |
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| See your local and national electrical codes for proper | |||||
| • Always connect the Precision Tig to a power supply grounded | grounding methods. |
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| in accordance with the National Electrical Code and all local | The spark gap oscillator in the high frequency genera- | ||||||||
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| codes. |
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| tor, being similar to a radio transmitter, can be blamed | |||||
| SELECT SUITABLE LOCATION |
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| for many radio, TV and electronic equipment interfer- | |||||
Place the welder where clean cool air can freely circu- | radiated interference. Proper grounding methods can | ||||||||||
late in through the rear louvers and out through the bot- | be reduced or eliminate |
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tom opening. Dirt, dust or any foreign material that can | The Precision TIG 275 has been field tested under rec- | ||||||||||
be drawn into the machine should be kept at a mini- | ommended installation conditions and has been found | ||||||||||
mum. Failure to observe these precautions can result | to comply with F.C.C. allowable radiation limits. | This | |||||||||
in excessive operating temperatures and nuisance | welder has also been found to comply with NEMA stan- | ||||||||||
trips. |
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| dards for high frequency stabilized power sources. | ||||||
GRINDING |
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| Radiated interference can develop in the following four | |||||||
Do not direct grinding particles towards the welder. An | ways: |
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abundance of conductive material can cause mainte- | * Direct interference radiated from the welder. |
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nance problems. |
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| * Direct interference radiated from the welding leads. | |||||||
STACKING |
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| * Direct interference radiated from the feedback into | |||||||
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| the power lines. | of “pickup” | by | ||||||
The Precision Tig 275 cannot be stacked. |
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| * Interference from | |||||||
UNDERCARRIAGE LIFTING AND MOVING | ungrounded metallic objects. |
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Keeping these contributing factors in mind, installing | |||||||||||
When the Precision TIG 275 is purchased as a welding | |||||||||||
package, or used with any of the available | the equipment per the following instructions should | ||||||||||
Undercarriage optional accessories, proper installation | minimize problems. |
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makes the Precision TIG 275 lift bale nonfunctional. | 1. Keep the welder power supply lines as short as pos- | ||||||||||
Do not attempt to lift the power source with an under- | sible and completely enclose them in rigid metallic con- | ||||||||||
carriage attached. The undercarriage is designed for | duit or equivalent shielding for a minimum distance of | ||||||||||
hand moving only; mechanized movement can lead to | 50 feet (15.2 m). There must be good electrical contact | ||||||||||
personal injury and/or damage to the Precision TIG | between this conduit must be connected to a driven | ||||||||||
275. |
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| ground and the entire length must be continuous. |
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TILTING |
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| 2. Keep the work and electrode leads as short as pos- | |||||||
Each machine must be placed on a secure, level sur- | sible and as close together as possible. Lengths | ||||||||||
face, either directly or on a recommended undercar- | should not exceed 25 feet (7.6m). Tape the leads | ||||||||||
riage. |
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| together when practical. |
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PRECISION TIG 275
