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5.6 CHEMICAL ADDITIVES
1. Additives can be introduced into the water only when it is being used in the
low-pressure mode
(less
than 500 PSI). A black,
low-pressure
nozzle is included for this reason. Install this nozzle when
chemical injection is desired.
2. Place the supplied clear hose onto the small hose barb located near the pump outlet. Install the
strainer on the free end of the clear hose. Place the strainer end into the chemical additive.
3.
IMPORTANT!
Do not use acids or gritty material in the dispensing system. If your spray solution must
be made up from a dry chemical, ensure that it is completely dissolved and stays mixed.
4. Open the injector valve by turning it counter-clockwise. More additive is allowed into the stream of
water as the valve is opened. Note that not all injector valves are adjustable.
5. With the low-pressure nozzle installed, turn on the washer and begin spraying the chemical/water mix.
NOTE:
the amount of chemical drain per minute and its ratio to water depends on the chemical viscosity and
water pressure. To determine the exact amount of additive, the system will have to be calibrated (refer to
Section 5.7).
5.7 DETERMINING CHEMICAL ADDITIVE-TO-WATER RATIO
To determine the exact amount of additive going into the water, the system must be calibrated. Follow this
procedure to calibrate the system:
1. Fill a calibrated container with the additive.
2. Connect the plastic line to the injector valve and insert the free end into the additive.
3. Close the injector valve.
4. Install
the
low-pressure
nozzle and start the motor.
5. Depress the trigger on the spray gun to start the flow of water.
6. Open the injector valve to start the flow of additive.
7. When the additive fills the line and starts to come out of the nozzle, release the trigger and stop
spraying.
8. Note exactly how much additive remains in the calibrated container.
9. Place the nozzle into a pail and spray until a known amount of water fills the pail.
10. Stop spraying and note the amount of additive remaining.
11. Subtract the additive in step 10 from that in step 8 to determine the amount used.
12. This amount divided by the amount of water in the pail will give you the exact ratio of additive to water.
13. Recalibrate if the rate is reset.
14. Do not touch the injector valve if you wish to keep this rate of application.
15. Recalibrate if a different additive is used.
NOTE:
Do not mix units when calibrating. Always use ounces, quarts or liters for both measurements.
