6
UPSTREAM CHEMICAL INJECTION:
When injecting chemicals “upstream” what you are doing
is introducing chemicals to the water flow as it enters the
actual pump inlet and requires a float tank. The popularity
of this type of chemical injection is due to the fact that this
allows chemicals to be applied at
full pressure
a major advantage for productivity.
DOWNSTREAM CHEMICAL INJECTION:
Mounted to the outlet of the pump or the coil a
downstream injector introduces chemicals to the water flow
AFTER it leaves the pump or the coil. This effectively
eliminates the major risks of exposing the inner workings
of a pump to harsh chemicals. When chemical is
desired, the system must be switched over to the low
pressure nozzle to draw chemical.
A. Engage the trigger safety latch on the spray
wand. Pull back the Quick-Connect collar on
the end of the wand and remove the tip. Now
insert “black” tip into the fitting, and release
the collar. You can draw chemical only with the
“black” low pressure nozzle.Tug on spray tip to
make sure the connection is secure. Rotate to
desired spray angle. For most effective
cleaning, keep spray tip from 8 to 24 inches
away from the cleaningsurface.
B. Insert chemical screen into chemical container.
C. Turn the
burner switch to the “off”
postion.
There will be air in the chemical line. Air heats
very quickly and needs to be eliminated
before the burner can be turned on.Open the
metering valve counter clockwise with the
trigger gun open allowing the chemical to
come up the chemical line. Chemical should
begin moving up the chemical line. Once t he
chemical line is completely full, trigger the gun
on and off numerous times to break any
possible air locks. Turn burner system switch to
“on” position.
D. If the gun assembly is equipped with variable or
multiple nozzle assembly, adjust to low
pressure.
E. If the gun assembly is equipped with a dual
lance wand open the valve.
Do not allow the detergent to dry on the surface
(prevents streaking).
TO RINSE:
A. If the machine is equipped with a panel mounted
metering valve, close the chemical metering valve
(if so equipped). NOTE: It is advisable to dip the
chemical screen in a container of clean water and
open the valve 1 minute to clean the valve of any
remaining residue.
B. If the gun assembly is equipped with variable or
multiple nozzle assembly, open and close to clean
nozzle of any remaining residue.
C. After a clear flow of water is noted from the end
of the wand, start from the top, working downward
using long, overlapping strokes.
1.
Turn the switch to the pump off position.
2.
Turn off the water supply.
3.
If freezing conditions may exist, refer to STORAGE in
MACHINE
MAINTENANCE
.
CAUTION: You cannot draw an abrasive product such
as an aluminum brightner. It will cause an non-
warrantable premature pump failure.
SHUT-DOWN
