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Figure 8. MIV PANEL PLACARD MOUNTING DIMENSIONS
2.5.5 Cold Weather Operation
During extremely cold weather the pump and Hale MIV must be completely drained to prevent
ice formation and possible damage. During cold weather operation use the following procedure
for continued reliable operation.
1.
Immediately after completion of operations drain and disconnect the large diameter hose.
Open all apparatus suction valves, discharge valves, Hale MIV and drain valves. Remove
the suction tube caps. Permit water to drain completely from the pump and piping.
2.
After pump is completely drained replace all caps and close all valves. The Hale MIV should
be kept in the closed position during cold weather.
WHEN THE ELECTRIC MOTOR DRIVEN VALVE IS OPERATED THE MANUAL OVERRIDE
HANDWHEEL WILL TURN. KEEP HANDS, FEET OR LOOSE CLOTHING AWAY FROM THE
HANDWHEEL TO PREVENT ENTANGLEMENT.
3.
If, during cold weather the formation of ice in the pump suction tube prevents normal
opening of the Hale MIV-E, the valve disc may be freed by repeatedly moving the toggle
switch (figure 8) on the operator panel from OPEN to CLOSED position jogging the valve
disc to release the ice. Repeat movement of the toggle switch as many times as necessary
to break the disc free. Observe the manual override handwheel to determine when disc is
free, and valve is operating.
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