MicroCool BIGHORN 1000, Инструкция по установке и обслуживанию

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BIGHORN_March 2020.docx
March 26, 2020 Page
11 of 36
If for any reason the regulator is adjusted, or changed, follow this procedure to reset the correct adjustment.
7.3.1 Turn off the electrical supply at the disconnect switch to electrically isolate the pump.
7.3.2 Locate the pressure transducer and unplug the electrical lead.
7.3.3 Restore the power and start the unit by selecting MAN (ON) position on the main switch.
7.3.4 Adjust the regulator by turning clockwise or counter-clockwise until the pressure gauge indicates 1,100
psi (75.8 Bar). When the pressure is steady at 1,100 make sure that the “Jam Nut” is tightened to lock
the adjustment in position.
7.3.5 Select OFF on the main switch to turn the pump off, disconnect the electrical supply.
7.3.6 Plug electrical lead back into transducer, restore electrical power.
8. DRAIN VALVE SEQUENCE
8.1
SYSTEM ON/OFF
TURN THE MAN/OFF/AUTO switch to the OFF position. The BIGHORN pump now enters its preprogrammed drain
sequence.
8.2
RAMP DOWN
The pump will electronically ramp down (slow to a stop) to avoid any water hammer. After a 3 second delay, the inlet
solenoid valve will close and the drain solenoid will open. The system pressure is relieved. Excess water will drain
out of the BIGHORN pump and the MicroCool nozzle system.
8.3
LOW SYSTEM SHOCK
This BIGHORN system, unique to the MicroCool pump range, is electronically activated to reduce system “shock”
and alleviates potential water hammer in the system that can damage the pump and the nozzle system. This
procedure is preprogrammed into the Variable Frequency Drive.
9. SYSTEM OPERATION
9.1 EXTERNAL CONTROLS
With external thermostats, humidity controllers or master control units correctly connected to the remote start
terminals in the Electrical Enclosure (see diagram above), MAN/OFF/AUTO switch must be set in the AUTO* position
and the MicroCool BIGHORN pump will operate in full automatic mode.
*If operating the BIGHORN pump in AUTO, the terminal/block switch inside the Electrical Enclosure should be
opened, disabling the MANUAL switch.
External Controls: Disable Manual Switch