Replacing The Torch Coolant And Filter - Lincoln Electric SPIRIT II 150 Technical Manual

Section 6: Maintenance &Troubleshooting

Replacing the Torch Coolant and Filter

WARNING: Do not touch the fans inside the power supply.
Important: Never turn on the system when the coolant reservoir is empty.
Important: When handling coolant, wear nitrile gloves and safety glasses.
Important: Only use approved coolant. Commercially available antifreeze
contains corrosion inhibitors that will damage the cooling system.
See Section 2 for more information.
The torch coolant should be flushed out of the system every six months and replaced
with new coolant. Replace the coolant filter / deionization cartridge at the same time.
1. Remove primary power from the Spirit system.
2. Ensure the torch base and torch head (with consumables) are properly installed.
3. Ensure the coolant supply (in and out) hoses are properly installed.
4. Remove the coolant reservoir cap/level gauge.
5. Remove the top, left and right covers from the power supply.
6. Connect a 3/8" ID hose and bucket to the drain petcock on the bottom of the
reservoir. Unscrew the petcock to drain the reservoir. Leave the hose and bucket in
place after the coolant drains out.
7. Remove the coolant supply hose (coolant out) from the rear of the power supply.
Note that the coolant supply hose has right hand threads. Be prepared for some
coolant to escape from the fitting on the power supply and from the supply hose.
8. Blow compressed air (100 psi maximum) into the coolant supply hose. This will force
the remaining coolant from the torch, torch leads, and supply hose into the reservoir
and out of the drain petcock. Continue until coolant stops flowing into the bucket.
9. Tighten the drain petcock and remove the hose and bucket.
10. Protect the area beneath the coolant filter housing as coolant will leak during this
step. Unscrew the coolant filter housing and remove it from the power supply. Use
caution as the housing will be full of coolant. Install a new coolant filter / deionization
cartridge and replace the coolant filter housing. Remove the protective material and
dry any leaked coolant.
11. Reconnect the coolant supply hose on the rear of the power supply.
12. Follow all of the steps in "Filling the Cooling System" in Section 3 of this manual to
complete this procedure.
This information is subject to the controls of the Export Administration Regulations [EAR]. This information shall not be provided to
non-U.S. persons or transferred by any means to any location outside the United States contrary to the requirements of the EAR.
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Spirit II User's Manual