MicroCool BIGHORN 1000, Installation & Maintenance Manual

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BIGHORN_March 2020.docx
March 26, 2020 Page
9 of 36
5.
BIGHORN – VFD BASICS
•
The VFD (Variable Frequency Drive) controls the speed of the electrical motor (and subsequently the pump
head) by changing the Frequency (Hertz).
•
The VFD is shipped with a minimum factory setting of 30 Hz. This will produce the minimum speed at which
the pump is still capable of adequate oil distribution within the crankcase. This minimum setting will ensure
reduced motor and pump wear.
•
The VFD is factory set at a maximum of 60 Hz. This will produce the maximum designed water flow of the
pump at 1000 psi / 70 Bar.
• For more details on the VFD drive, the readings and fault status refer to the WEG Drive supplement which
is enclosed.
6. MICROCOOL BIGHORN - STARTING THE SYSTEM
6.1 SYSTEM FLUSH
The system must be flushed before pressurization. This removes any contaminants such as dirt, brass filings or
Teflon tape that have found their way into the system. At the end of each atomization line, there is a plug or an
automatic drain valve. Do not install plugs or automatic drain valves until the system has been completely flushed.
6.2 WATER & DRAIN VALVES
Turn on the water supply to the pump module. Ensure that the drain valves or plugs at the end of lines are not
installed.
6.3
TURN ON POWER
1. Turn on the power supply to the BIGHORN module, and then
turn the circuit breaker switch mounted inside the electrical
enclosure to the on position. Ensure the VFD reads “RDY”.
2. To start the pump, switch the “MAN/OFF/AUTO” switch to the
MAN position.
6.4
PUMP IS RUNNING
The pump system is now in operation. The VFD will increase the
speed of the motor / pump to maximum speed (60 Hz) to fill the
manifold and nozzle lines.
Switch to Manual ‘MAN’ Position