Coolant flow test -34, Coolant flow test – Hypertherm HT4400 HySpeed Plasma Arc Cutting System User Manual
Page 125
MAINTENANCE
5-34
HT4400
Instruction Manual
7
Coolant Flow Test
1. Turn power off to the HT4400.
2. Remove the return coolant hose from the Cooler (hose with red tape).
3. Set the thumbwheel switch (S2) on the Gas Console to “Leak Test 1” or “Leak Test 2.”
4. Locate a 1-gallon container and place the return coolant hose inside the container.
5. Turn power to the HT4400 on.
6. Coolant will flow for 30 seconds and then shut off. In 30 seconds you should be able to get a minimum of
1/2 gallon of coolant.
7. Run the coolant test again by switching S2 to “Run” and then back to one of the leak test modes.
8. Again the coolant will flow for 30 seconds and then shut off. At this point the 1-gallon container should be more
than full, worst case.
9. If the container is not full, than perform same test but at the torch.
10. To perform this test remove all the consumables from the torch. Running the coolant for 1 minute should result
in approximately 1.5 gallons of coolant.
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