MIGHTY-VAC INSTRUCTIONS
The Mighty-Vac model numbers 80275 and 80276 have input rating of 115 volts/13 amps and 230 volts/6.21 amps respectively;
therefore, select the proper extension cord for the distance from the electric source to the Mighty-Vac from the table below.
Model #: 80275 115V 13 amps Model #: 80276 230V 6.21 amps
16 gauge / 3 wire Up to 40” 14 gauge / 3wire Up to 40”
14 gauge / 3wire Up to 60” 12 gauge / 3wire Up to 60”
12 gauge / 3wire Up to 100” 10 gauge / 3 wire Up to 100”
BE CERTAIN THAT THE UNIT IS PROPERLY GROUNDED!
The Mighty-Vac is equipped with a tapered vacuum inlet fitting designed to hold a 1 1/2” standard hose cuff firmly in place merely
by press fit. The vacuum inlet fitting has a built-in protective baffle screen to block larger foreign particles from being drawn
through the motor. Small amounts of sand and moisture will not appreciably harm the Mighty-Vac. DO NOT PUMP WATER
THROUGH THE UNIT. This would be destructive to the Mighty-Vac.
Preparation for installing the vinyl liner and the correct positioning of the vinyl liner is explained fully in the instruction manual
provided by the liner manufacturer. After the liner is properly positioned, press-fit one end of a 1 1/2” vacuum hose to the Mighty-
Vac vacuum inlet fitting. Attach a short length of PVC pipe to the other end of the vacuum hose to prevent crushing. Then insert
the hose between the liner and the pool wall to approximately 5” or 6” from the pool bottom. Seal the open area around the hose
with either suitable tape or wet cloths. Refer to the liner manufacturer’s installation manual for the location of other areas that
require sealing.
After the liner is drawn into place, examine it from all directions to make certain that it is positioned properly. Make adjustments
where necessary (while vacuum is running if possible) by pulling the liner into place. If folds or wrinkles are present, the weight of
the water will probably remove them or remove them by pulling or snapping them out. (Refer to liner manufacturer’s installation
manual).
It is necessary to remove wrinkles before the water level comes up. In some cases, where substantial repositioning is required, it
may be advisable to shut off the vacuum to make the adjustment before drawing the liner into position again. Turn off the vacuum
and remove it when the water level is approximately 2” up the pool wall at the shallow end.
WINTERIZING POOL PLUMBING LINES: The Might-Vac is equipped with a threaded (1 1/2” NPT) discharge outlet. It is furnished
with a Discharge Fitting (1 1/2” MIP and 1 1/2” by 1 1/2”combo hose male adapter) designed to hold a standard 1 1/2” hose cuff
firmly in place merely by press fit.
Drain water level below skimmer and/or return line fittings. Thread 1 1/2” MIP and 1 1/2” combo hose male adapter into the
threaded discharge outlet of the Mighty-Vac. Press fit one end of the vacuum hose to the combo male adapter. Attach the other
end of the vacuum hose to the skimmer intake and close the drain valve.
Turn on the Mighty-Vac. When return lines are clear of water, plug them. Open valve to main drain (depending on system). When
air bubbles from main drain are visible, shut off the main drain. Leave the Mighty-Vac on. Open all drain cogs or other drain
measures until the filter system is water free. Shut off the Mighty-Vac, and close the system.
CAUTION: The Mighty-Vac motor is not thermally protected. Do not leave your Mighty-Vac on and unattended for prolonged
periods-of-time. This can lead to over heating and damage to the unit, voiding the warranty. The Mighty-Vac
must be well ventilated when in use. Never enclose the Mighty-Vac when in use to reduce noise. Try to keep the
Mighty-Vac out of intense sunlight when in use for prolonged periods-of-time as this can increase the chance of over
heating.
WARNING: The Mighty-Vac utilizes a “Brush Motor”. This type of motor is not designed to run indefinitely. The brushes in this
motor are rated to last approximately 750 hours, at that time they need to be replaced. Please see your distributor
to order replacement brushes or have them replaced at a vacuum repair shop.
Please refer to LIMITED WARRANTY for warranty exclusions and procedures.
MV-INSTR Rev B August 6, 2009
(4 pages)
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