Hypertherm HT2000 Water Muffler - Manual (Page 21)

OPERATION & MAINTENANCE
Page 3-2
HT2000/MAX200
Water Muffler
Instruction Manual
OPERATION
The HT2000/MAX200 Water Muffler system will start automatically with the initiation
of the start signal to the plasma cutting torch. Input power to the pump motor is
available in either 240/480V, 3 PH, 60 Hz; 380-415V, 3 PH, 50Hz; or 600V, 3 PH,
60 Hz configurations. The pump contactor coil is energized by a 120VAC signal from
the power supply. When the 120VAC contactor circuit is actuated, the pump operates
and water flows. The Water Muffler will only operate when the TEST/RUN switch on
the MAX200 is in the RUN position. Likewise, the Water Muffler will only operate on
the HT2000 system when S2 on the gas console is in the RUN position.
The operating procedures and requirements for above and underwater cutting are as
follows:
Above-Water/Underwater Cutting
1. Ensure the Water Muffler System is installed according to the procedures in
Installation, Section 2.
2.
Above-Water Cutting
At the Water Table, ensure the water level is maintained at or slightly above the
bottom of the workpiece. If initial height sensing (IHS) is not used, manual torch
positioning will be necessary. This is done by lowering the torch to approxi-
mately 1/4 inch (6mm) above the top surface of the workpiece.
Underwater Cutting
At the Water Table, ensure the water level is maintained at three inches or more
above the top surface of the workpiece. It is recommended that initial height
sensing (IHS) be used when cutting under water. If an IHS system is not used,
manually position the torch as in above-water cutting.
3. Apply power to the HT2000 or MAX200 and press the green POWER ON switch.
Depress the plasma start switch. A command signal is output to the pump
contactor to operate the pump. The water pump delivers approximately 9 to 11
gallons per minute.