Legal Temp for Hot Water

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Checklist for commissioning hot water systems: 1. Check if the circulation pump is in operation, if it is installed. 2. Check if the flow direction of the circulation pump is correct. 3. Document head pressure, flow and power, voltage, phase, manufacturer and model number of the circulation pump. 4. Check and document the thermostatic mixing valve set point (if a mixing valve is installed). Document incoming cold water temperature, incoming hot water temperature, and outlet temperature with a single upstream device circulating downstream.

Make sure that the temperature difference between hot and temperate water meets the temperature difference requirements (5°F – 20°F) required by the manufacturer. Bimetallic coil mixers typically require a minimum flow or higher recirculation flow rate and a temperature difference of at least 20°F. 5. Document the manufacturer, model number, flow rate, and temperature range of the mixing valve (if applicable). 6. Check that a heat compensation tank or means of relieving thermal expansion is installed and properly sized and located in the cold water line of the water heater. 7. If a circulation pump and thermostatic mixing valve are installed, verify that the return line is properly installed according to the mixing valve manufacturer`s installation instructions. 8. Run hot water from the appliance furthest from the hot spring until the hot water temperature stabilizes. Document and record the maximum temperatures of the hot water system using a thermometer calibrated in a cup located within 6 inches of the appliance outlet at the end of the appliance every 15 seconds until the temperature stabilizes for five consecutive readings.

9. If there is a thermometer at the end of the hot water return system, make sure the hot water return temperature is above 124°F to prevent Legionella growth. 10. If the hot water return temperature is too low, adjust the thermostat of the water heater or thermostatic mixing valve as needed to achieve the desired hot water return temperature to avoid hot water system temperatures that promote the growth of Legionella and other organic pathogens. 11. Note the maximum hot water system temperatures with a thermometer in a cup within 6 inches of the appliance outlet on all appliances that use hot water. Record temperatures every 15 seconds for five minutes or until the temperature stabilizes for five consecutive readings. 12.

If the maximum hot water temperature exceeds the code limit for showers, bathtubs or other appliances prescribed for hot water, readjust the limit stops or limiting device and test the maximum temperature limit again. 13. If the owner does not want to perform maximum temperature shutdown tests to ensure temperatures are safe, provide the owner with documentation on how to proceed. In addition, provide the manufacturer`s installation and maintenance documentation and ask the owner to sign a release informing them that you have brought this requirement to their attention and that it is their responsibility to make limit shutdown adjustments prior to occupancy and according to the seasons in accordance with the manufacturer`s installation instructions. These valves are designed to prevent burns in places such as homes, schools, motels, and residential buildings, where ideally all hot water outlets should come from a starter valve. Provides valves suitable for water inlet temperatures up to 100 degrees C. The 2016-02-16 by (mod) – do people know if hot water regulations apply to the replacement or relocation of heaters? Good contractors will already have these printed materials with instructions on how to do so. If the owner does not want to take on this task, a fee may be charged for each valve that is readjusted to avoid scalding injuries. The same procedure should be followed if someone simply resets the thermostat setting of the water heater. If you are testing the temperature of your water, you can use a meat thermometer on a tap with hot water. The continuous work of water heaters gives you hot water even when you are not using them. If you live in a colder climate, your water heater works tirelessly to keep your water at 120 degrees Fahrenheit.

This is an excellent reference site. I use a communal pool which is wonderful. However, the showers have no temperature control. And sometimes the water feels like it`s burning. I`m going to take a thermometer there to see how hot the water is. The factors that affect the temperature of your hot water are multiple. They range from the type of plumbing you have to the type of energy you use. Energy is defined as gas or electricity. The following factors represent the specifics of the types of things that affect the temperature of your water heater. Typical sources indicate that the ideal hot water temperature for hot water bottles in New Zealand is 60°C to keep the water warm enough to kill bacteria in the heater.

Higher temperature settings in the cylinder are not necessary and increase the cost of heating water. When hot water comes from storage, building codes prescribe a storage temperature of 60°C and a circulation temperature of at least 55°C to prevent the development of Legionella or similar pathogens. If the high-temperature water comes from any source, there is a risk of scalding for building occupants. The risk of serious injury increases with the increase in temperature and the extent of contact. In talking with many people on this topic, I have found that many people do not know how shower valves are manufactured, designed, installed and maintained. That`s why I suggested ASSE work on a white paper to educate the public and industry on how to set maximum temperature limits on shower faucets and other temperature limiters. There are a few people who mistakenly believe that the language in the code that says „means limiting the maximum valve setting to 120°F can be achieved with a thermostat controller setting on the water heater.“ Misinterpreted codes Some people have claimed that the maximum storage temperature allowed or thermostat setting of a water heater is 120°F. Such a requirement does not exist in a plumbing model code. It has been claimed that the maximum temperature is 125°F, based on the burn temperature labels on the outside of most water heaters. Again, there is no such requirement in a model plumbing code that addresses the hot water storage or distribution temperature of a water heater.

This eliminates the contractor`s liability in the event of a burn incident associated with a shutdown of the limit value after performing work on the hot water system. There have been many proposals for a green code and an energy code from well-meaning people who have tried to limit the temperature of hot water in order to save energy. There are outbreaks of legionella due to energy conservation efforts by maintenance personnel and energy conservation programs that have required a reduction in water heater temperature to achieve energy savings to reduce standby energy loss.