When looking at the solution temperature of a
machine, most machines will go up to 230° – 250°F when water isn’t being
used, but will they sustain the temperature when you are in a
typical cleaning cycle, or using an RX-20? Most of them
We’ve worked hard to make the Maxx™ series, Boxxer™ and CDS™ the hottest machines in
each of their classes. Prove it to yourself, run any of these machines
against our competitors and you too will be a believer.
Things to think about…
comparing solution temperatures on truckmounts, you cannot always believe
the temperature gauge of the machine is accurate.
Now why is
There are many variables that make the temperature look hotter or
colder than it really is.
- Where is the Temperature Gauge
sender located? Is it on or near the heat exchanger? Plumbing it near
the heat exchanger is going to give you an artificially elevated
temperature. The proper location for the sender is at the outlet quick
connect manifold. This will give you a more accurate reading.
- Where is the Pressure Gauge
reference tap plumbed? This makes a difference because some machines
have more pressure restrictions than others. Is the tap plumbed before
the restrictions or after? In our testing of various machines we have
seen that the actual pressure leaving the machine can be up to 200 psi
less than what the gauge is reading (500 psi on the gauge, 300-psi
actual pressure). This restriction causes a pressure drop, which reduces
the gallons per minute through the cleaning tool. The less flow you have
the hotter the solution. In this case you are getting the heat but at
the expense of reduced water flow.
- What size jet is being used? This
can also reduce water flow.
- What is the Vacuum Breaker set at?
Is the vacuum blower inlet connection blower reduced down thus causing
restriction of airflow “CFM”? Is the vacuum blower outlet restricted
down? This will cause the blower to operate at elevated temperatures
reducing component life. Anything that causes the system to operate at a
higher “Hg level will produce higher temperatures in the Blower (and the
Blower Heat Exchanger). This will also make the engine work harder.
machines for temperature performance it is important to do the
- Use an external temperature and
pressure gauge. Set the machine at 14” Hg and use a number 6 jet.
Connect the external gauges at the end of 100 feet of hose.
Adjust the machine’s pressure until the external gauge reads 350 PSI.
Use the same set-up for all of the machines you are testing. This will
give you an accurate pressure and temperature reading in comparison to
all of the machines being tested.
- Let the machine heat up under a full vacuum
load for 10-15 minutes. This will allow all the components to achieve
their maximum temperatures.
- Do two tests:
First test- Run the
machine for ten minutes with a continuous flow of water. This will give
you a Continuous Flow temperature reading. (After ten minutes the
machines temperatures will level out). The continuous water flow test
will show what the machine is capable of during cleaning with Rotary
machines or a continuous spray with a wand.
Immediately after the first test, stop spraying water for two minutes.
This will allow the machine to recover and heat up. Then cycle the spray
with 30 seconds on, followed by 10 seconds off. Repeat this cycle for
ten minutes. At the end of this ten minutes, the temperature of the
machine will level out. Now take a final temperature reading. This test
simulates the machine’s ability to recover and perform heavy duty
cleaning followed by a dry pass.
If you have any questions please call