HydraMaster Boxxer 423s, Руководство пользователя

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6-1: Water and Chemical System
6 - Water and
Chemical System
This section describes the Boxxer 423s’ water and chemical systems, and includes the
exhaust subsystem.
1. The process starts when fresh water is brought through the front of the truckmount
into the water box, as indicated in Figure 6-1. The level of water in the box is
maintained by the use of a float valve. The water is then gravity-fed to the pump
where it is pressurized.
2. Next, the pressurized water enters the by-pass valve. This valve allows manual
adjustment of the pressure level. When the valve at the wand is closed, the water
in the system is recirculated to the water box. When solution is being used at the
wand, the necessary amount of high pressure water passes through the by-pass
valve and to the heat exchanger.
3. In the heat exchanger, the temperature is raised. The heat necessary to do this is
provided by both the engine and blower exhausts. The heated water then travels to
the high pressure manifold.
4. Water temperature is controlled via a temperature sensor inside the high pressure
manifold. When the system achieves the maximum operating temperature, the high
pressure solenoid opens and flows water into the recovery tank. This will reduce the
internal temperature of the machine.
5. Water that is recirculated through the pressure regulator back to the water box travels
past a thermal valve. This thermal valve monitors the water box temperature.
6. When the thermal valve senses the water in the water box has reached its set point,
it opens the low pressure thermal valve on the side of the water box and closes once
the temperature drops back below the set point (see Figure 6-2).
7. The water that is being called for by the wand then exits the manifold and passes
through a check valve (see Figure 6-2).