Operating instructions

OPERATION
980076 08/26/03
3-9
WATER PUMPING SYSTEM
(See diagram following page). Cold water enters the
console through the water inlet connection located
on the lower front panel. The water flows to the
water box through a float valve, which shuts off
water flow when the water box is full.
When the water pump clutch is energized water
flows through a strainer into the water pump where it
is pressurized.
Because the water is constantly being pulled and
pushed from the pump, a means to cushion these
pulsations is required. A nitrogen-charged
accumulator has been provided to reduce pressure
fluctuations.
A pressure regulator has been provided to maintain
the desired pressure setting. If the tool valve is
closed, water flows through the pressure regulator
into the water box.
When the tool valve is open, water flows through a
differential check valve which, by using differential
pressure applied to a flow-activated control, assures
that the burner will only function when there is water
flow.
The water then flows through a progressive style
heating coil where it is heated to the desired
temperature. As the hot water leaves the coil it flows
by a high limit temperature switch. This switch will
shut the unit down if the heat becomes excessive.
Next, the hot water flows through the check valve
and Y-strainer to the outlet manifold.
This is where chemical injection occurs. The check
valve also contains the temperature gauge sensor.
The hot solution then flows into the cleaning tool.
Temperature is adjusted primarily using the
thermostatic temperature control. This control turns
the burner on when required, if the tool is open. The
temperature sensor for this control is located on a
tee at the coil outlet.