Sandia 12-Gallon, 1200 PSI Hard Surface Extractor - Manual (Page 9)

(32) 1200 PSI Hard Surface Extractor 1200 PSI Hard Surface Extractor (9)
3.2 Pressure Pump System
The Hard Surface Extractor utilizes a twin piston pump which is adjustable from 100-
1200 PSI. Never operate the pump at a pressure setting over 1200 PSI or without water
in the solution tank. Doing so will damage the pump and will void the warranty. Anytime
the Hard Surface Extractor has been stored for a period of time or has had the pump run
“dry,” the solution pump will have to be primed to remove air which might be trapped in
the pumping system (see “Priming the Solution Pump” section).
When high pressure drop is engaged, a pressure drop of approximately 100 PSI is
considered normal. However, if pressure drops greatly exceeding 100 PSI or if there is
strong pulsation in the solution hose, prime the pump.
Pressure Regulator (Unloader Valve):
pressure is easily adjusted by a pressure
regulator located on the rear of the machine next to the pressure gauge, only when the
valve to a wand or high pressure valve is engaged. To increase the solution pressure, twist
the regulator handle clockwise. DO NOT operate the pump above 1200 PSI.
Priming the Solution Pump:
connect the pressure hose to the female quick
disconnect (QD) on the front of the machine. Insert an open-ended male QD into the
female QD on the end of the pressure hose.
Turn on the pressure pump switch and the vacuum switches (both vacuum I and II
switches). Direct the solution back into the recovery tank through the vacuum inlet. Cup
your hand around the vacuum inlet allowing the vacuum from the Hard Surface Extractor
to pull the solution through the solution hose. Allow solution to run for 10 seconds. This
allows the solution to push out any air in the pumping system. Repeat this procedure if
necessary. When the pressure hose is connected to the wand, the pressure drop should
only be approximately 100 PSI.
3.3 Vacuum System
Vacuum Motors: the Hard Surface Extractor utilizes a unique two (2) vacuum system,
using one (1) 3-stage and one (1) 2-stage motor, which produces both outstanding
vacuum lift and airflow for superior extraction and drying times. The vacuum system can
be used with one vacuum motor for cleaning delicate fabrics or both vacuum motors for
carpet cleaning, water extraction and hard surface cleaning.
Vacuum Float Assembly Warning System:
the float assembly on the vacuum stand
pipe prevents the waste tank from overflowing the stand pipe and damaging the vacuum
motors. Motors will reach a fast, high-pitched sound alerting you when the recovery tank
is about to over flow. When this happens, immediately turn OFF the vacuum switches and
empty the waste tank.
The float assembly has a filter to prevent lint and debris from entering the stand pipe.
Refer to the “Maintenance” section for removal and proper cleaning.
Recovery Tank:
the vacuum system requires the use of an external filter. The clear
view in-line filter is included with the machine and must be used on every job.
It is also necessary to use a defoamer to eliminate foam build-up in the recovery
tank which could lead to foam/moisture entering the vacuums and contributing to
early failure of the vacuum motors.
If moisture does enter the vacuum motors, contact an authorized service center. To
prevent moisture from damaging the vacuum motors during storage, empty the recovery
tank and store with the lid open.
11.0 Recovery Tank
Schematic Drawing