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SECTION I – TANKLESS WATER HEATER OPERATING PRINCIPLE
How the Hubbell Tankless Water Heater Works:
For the most part, operating your new tankless water heater is very similar to using any
traditional water heater system. However, it is very important that you carefully read all of
the set-up procedures and operating instructions to ensure maximum performance and
energy savings from your new water heater.
Your Hubbell Tankless Water Heater does not store hot water like a conventional tank-type
water heater. It contains high powered heating elements that are capable of heating water
instantly on-demand as you need it. As soon as you turn on a hot water faucet, a
sophisticated flow sensor within the heater recognizes that you have turned on the water.
This sensor measures the water flow rate while two other sensors measure the incoming and
outgoing water temperature. This information is transmitted continually to the
microprocessor controller which determines the precise amount of power to send to the
heating elements to heat the water to your desired temperature. The Hubbell tankless water
heater only uses as much power as is needed to meet the demand by fully modulating the
heating elements from 0 to 100%. Since your new water heater works on a demand basis, it
will absolutely never run out of hot water no matter how many back to back showers you
run!
It is important to keep in mind that every tankless water heater has a maximum flow rate. If
you exceed this flow rate, the heater will not be capable of fully heating water. How much
hot water your heater can provide will depend on the model you have selected and your
incoming water temperature. If you live in an area of the country where inlet cold water
temperature average 55° F or you have cold winters, you will probably NOT be able to run
multiple large water demand fixtures at the same time. However, you will be able to run all
your hot water fixtures back to back without ever having to wait. You will enjoy
UNLIMITED HOT WATER. See the charts in Section II to determine the maximum flow
rates.
Moreover, since a tankless water heater eliminates the ongoing thermal losses caused by
storing hot water in a tank, you will enjoy significant energy savings over a conventional
tank type water heater.
When you use hot water from a conventional tank type water heater, you need to mix a
considerable volume of cold water to cool the hot water down to a safe, comfortable level.
You need to do this because the heater is set at an extremely high temperature to prevent it
from running out of hot water quickly. With a tankless water heater, you typically set the
temperature at a much lower level since it is capable of heating your water on demand. This
level will be much closer to the actual temperature at which you feel comfortable showering
or bathing. As such, you will no longer need to mix much cold water to run a shower or
bath; in fact, you may mix very little or no cold water. This is perfectly normal and means
that you are no longer wasting energy by overheating your water.
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