Posted on 3rd Feb 2017
How to winterize Tankless Water Heater
If you have a tankless water heater that is not used for a longer period of time, and the place where you live is subjected to the freezing temperatures, it is very important to protect the unit during this cold winter time. Use the step-by-step guide below to learn how to winterize tankless water heater and avoid failure of the unit.
Many new tankless water heaters with the advanced technology and features like protection against freezing cold can be found today from the main manufacturers, like Rheem, AO Smith, Rinnai, Paloma... and during the winter time they can protect the system from freezing down to -30 F or even lower. But, don't rely on such a great feature.
These units are using an electric power as a protection system, so if there is a power outage, guess what... your tankless unit will fail.
This is why you should learn how to winterize tankless water heater during the cold days.
Note: Almost every manufacturer of tankless heaters specifies that the heater must not be installed in the area where the temperature can reach 36 F or lower. If precautions are not taken, like draining, the damage to the tankless unit and its components will not be covered under the warranty. Adding the anti-freeze solution is also not recommended as it can cause the damage to the heater's components.
This is especially important if the tankless water heater is installed in places like cabins, garages, and if you are absent for a long time.
One of the main steps in how to winterize the unattended tankless heater is to drain and unplug the unit. If there is no water in the heater's pipes and especially in the heat exchanger, the unit will not be damaged due to the freezing conditions.
So, how to prepare the heater for winter?
Now the water heater doesn't contain any water and it is fully winterized. Some manufacturers recommend using the air compressor, blow short bursts of air through the inlet connection to make sure there is no water left inside the heater.
Credit to: Hot-water-heaters-reviews.com
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