increase pump speed, and prime the air out of the pump. When the water is clear (no air in it) turn
the pump off, and remove the priming hose. NOTE: if priming is difficult, place the open end of the
priming hose into the Vacuum inlet hose barb, and turn the vacuum on. Use your hand to block the
open area in the hose barb. This will allow the pump and the vacuum to work together to get the
water moving. Priming may take 20 - 60 seconds, and the solution tank should be full. Turn motors
off. Remove priming hose.
5
Add liquid cleaning chemical, with a pH between 6 and 9, to the solution tank.
6
Attach the spray hose to the solution quick disconnect and the vacuum hose to the hose barb on
the recovery tank. Pull the hoses out from the reel. Attach the other ends of the hoses to the
cleaning tool.
7
Set the temperature knob to the desired heat setting. Allow the heat exchanger two minutes to
reach operating temperature. The red light will go out when the heater has reached operating
temperature. NOTE: the red light will be on nearly all the time as you clean.
8
Turn the pump on by setting the pressure adjust knob to the desired spraying pressure (0 - 300
PSI). Read the spraying pressure at the pressure gauge while spraying. Turn the vacuum on.
NOTE: the vacuum motor will start up slowly to prevent a large current surge.
9
Begin cleaning.
10 Use defoamer in the recovery tank any time foaming occurs.
11 Monitor the water level in the solution tank. Do not let the pump run dry.
12 When the solution tank gets low, turn off the pump and the vacuum, fill the solution tank, empty
and clean the recovery tank.
13 When finished with the job, remove any unused solution from the solution tank, and run a few
gallons of clean water through the system. Drain the recovery tank by placing the dump hose
over a drain, or a bucket, and removing the cap. Disconnect the hoses from the cleaning tool,
and reel them up onto the hose spool.
NOTE: To remove the reel, with hoses, from the machine, pull the vacuum hose loose from the hose
barb on the front of the tank. Disconnect the solution hose quick coupling. Push acuum hose into the
center of the hose spool. Grasp the spool from both sides, and lift it off the machine. NOTE: before
servicing any component in the base cabinet, the hoses and spool must be removed from the machine
before the tanks can be lifted open.
ELECTRIC CIRCUIT LOCATOR
This unique, patented system is operated by a solid state circuit. It will inform the operator when the two
cords are plugged into separate circuits by turning on the green, circuit locator light. This helps to prevent
tripping circuit breakers.
NOTE: if the green, circuit locator light does not illuminate when the cords are plugged in, then both cords
are on the same circuit. Try other outlets with one of the cords until you get the locator light to come on.
NOTE: if the bypass switch is turned on when both cords are on the same circuit, the breaker in the wall
may trip.
ELECTRONIC FLOAT SHUT-OFF
When the recovery tank is full, the electronic float switch will turn the vacuum motor off. This will prevent
water from entering the vacuum motor. The float may not work properly if the float filter rod is dirty or if
there is heavy foam in the tank. To reset, turn the Vacuum switch off, and empty the tank.
CAUTION: to avoid vacuum motor damage, always make sure the float filter is clean and that it can
travel freely before you operate the machine. Always use a defoamer any time foam is present.
Summary of Contents for COBRA PLUS-300
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