Hubbell ETXA Series, Описание, установка и руководство по эксплуатации, Страница: 4 / 52

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SECTION I
– TANKLESS WATER HEATER OPERATING PRINCIPLE
How the Hubbell Tankless Water Heater Works:
For the most part, operating the new tankless water heater is very similar to using any
traditional water heater system.
However, it is very important that, all the set-up procedures
and operating instructions are carefully read to ensure maximum performance and energy
savings from the new water heater.
The Hubbell TXA Series 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 needed. Due to these high powered elements, dry firing the TXA
series heater is a possibility. To prevent this, a low water detection system has been installed
to keep the elements from turning on if the unit has not been properly purged of air.
Once the air has been purged and as soon as there is a hot water demand, a sophisticated flow
sensor within the heater recognizes the demand and initiates the heating process. 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 t o
heat the water to the 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%.
It is important to keep in mind that all tankless water heaters are subject to a maximum flow
rate. If this flow rate is exceeded, the heater will not be capable of fully heating water. The
amount of water that can be heated by the tankless water heater at any given time will
depend on the model selected and the incoming water temperature. 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, there will be a significant energy savings compared to a
conventional tank type water heater.