U.S. Products King Cobra KC-500, Information And Operating Instructions

A-8

KING COBRA

®

 500 - 56041964

5/10

INSTRUCTIONS FOR USE

A - ENGLISH

SET-UP AND OPERATION

 CAUTION!

Use care when handling hazardous chemicals.
Never leave the machine running when you are not actively using it.
To avoid vacuum motor damage, always make sure the 

fl

 oat 

fi

 lter is clean and that it can travel freely before you operate the machine.  Always use a defoamer 

any time foam is present.

 DANGER!

Do NOT use solvents, or any chemicals that may be 

fl

 ammable, explosive or combustible.

CLEANING SOLUTIONS:

Select a proper pre-spray for the surface to be cleaned, and apply the pre-spray.  Use a neutral pH rinse or detergent (6 to 10 pH) in the King Cobra to prevent 
premature wear of the pumps, seals, and other components. Damage caused by the use of improper or strong chemicals is not covered by warranty.  Powdered 
chemicals are not recommended.
1 

Before each use, inspect the machine, hoses, and cleaning tools for cleanliness and completeness.  Make sure the hoses are in good condition and the 
spray nozzle(s) is tight.  Be sure the Pre-Filter Bag 

(22 / KC-500-ADAF only)

 and the Dump Pump Inlet Filter 

(21)

 are installed and are clean.

2 

KC-500-ADAF:

  When not using the auto-dump feature, just make sure the brass cap is screwed tightly on the Dump Hose Connection 

(16)

 on the dump 

pump on the rear of the machine.  If you choose to use the auto-dump, connect the dump hose to the Dump Hose Connection 

(16)

 on the back of the dump 

pump, and place the open end of the hose in a drain.  Make sure the Recovery Tank Drain Hose 

(15)

 is closed, and the Recovery Tank Lid 

(2)

 is closed tight.

REFER TO THE AUTO-FILL AND AUTO-DUMP INSTRUCTIONS ON THE FOLLOWING PAGES.

3 

KC-500-ADAF:

  If you choose to use the auto-

fi

 ll feature, connect the 

fi

 ll hose to the Auto-Fill Hose Connector 

(7)

. Turn on the water source, and allow the 

tank to 

fi

 ll with water.  When using the auto-

fi

 ll system, the auto-

fi

 ll 

fl

 oat will automatically turn on and turn off as the tank empties and then 

fi

 lls.  

NOTE:

 If you 

are not going to use the auto-

fi

 ll system, just 

fi

 ll the tank with water and cleaning chemical. Follow chemical directions regarding dilution and mixing. Do not 

use harsh chemicals; they may damage seals in pumps and valves, and cause the pump to wear prematurely.

NOTE:

  Using warm water in the tank may improve the ef

fi

 ciency of the heat exchanger when cleaning with heat, but never use water with a temperature 

exceeding 130 °F / 54 °C.

4 

Pre-spray the area to be cleaned, with a pump-up sprayer, while the tank is 

fi

 lling.  Follow chemical directions.

5 

Plug in the power cords 

(17)

.  

Do not connect both cords to the same outlet. The green, ‘separate circuit’ locator light 

(A)

 on the switch plate should light 

up.  If the locator light does not come on, check the circuit breaker box in the wall, and/or try different outlets until it does turn on.  

  If you are certain the 

cords are on separate circuits, turn the Bypass switch 

(B)

 on. 

CAUTION:

 using the Bypass switch 

(B)

 when the cords are on the same circuit may cause the breaker in the wall to trip.  

NOTE:

 the 

receptacle 

(15)

 on the left (viewed from behind the machine) powers the heater.  

The red light 

(F)

 will turn on only when the heat exchanger is actively heating.

6 

Press the lever on the Pressure Relief Valve 

(18)

 to make sure there is no back pressure in the system.

7 

Connect the priming/siphon hose to the Solution Hose Quick Connect 

(6)

, turn the pump ON by turning the Pump Pressure Knob 

(D)

 up to increase pump 

speed and turn the Vacuum Switch 

(C)

 on.  Place the open end of the priming hose into the Vacuum inlet hose barb 

(1)

.  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. The air should prime out of the pump within 20 - 
60 seconds.  Watch the water 

fl

 ow into the recovery tank.  When the water is clear (no air in it) and is 

fl

 owing strongly, turn both the pump and the vacuum 

off, and remove the priming hose.  NEVER remove the priming hose while the pump is still running.

8 

Connect the Solution Hose 

(19)

 from the reel to the Solution Hose Quick Connect 

(6)

 and connect the Vacuum Hose 

(23)

 from the reel to the Vacuum Hose 

Connection 

(1)

. Connect both hoses to the cleaning tool.

9 

Set the Temperature Knob 

(E)

 to the desired heat setting. Allow the heat exchanger two minutes to reach operating temperature.  The red light 

(F)

 will go out 

when the heater has reached operating temperature.  

NOTE:

  The red light will be on nearly all the time as you clean.

10  Turn the pump on by setting the Pump Pressure Knob 

(D)

 to the desired spraying pressure (0 - 500 PSI). Read the spraying pressure at the Pressure Gauge 

(G)

 while spraying.  

NOTE:

  when you let off the trigger on the wand, the pressure gauge reading will drop to 0 psi; however, the spraying pressure will 

remain at the level to which you have set it.  Turn the Vacuum Switch 

(C)

 ON. 

NOTE:

  the vacuum motor will start up slowly to prevent a large current surge.

KC-500-ADAF:  

Turn on the dump pump 

(25)

.  

NOTE:

  The dump pump will automatically turn on and turn off as the tank 

fi

 lls and then empties. It may take 

several cycles to heat the lines and the cleaning tool.

11  If you are not using the auto-

fi

 ll and auto-dump features, turn off both the pump 

(D)

 and vacuum 

(C)

 when the Holding Tank gets low, 

fi

 ll the Holding Tank, 

and empty and clean the recovery tank.

12 Begin 

cleaning.

13  Use defoamer in the recovery tank any time foaming occurs.
14 When 

fi

 nished 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 Vacuum hose into the center of the hose spool.  Grasp the spool from either side, 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.

5/12