Domestic Hot Water Boiler Temperature
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For canteens and professional kitchen temperatures of 65 oc are often required to satisfy hygienic standards.
Domestic hot water boiler temperature. However there is less danger of bacterial growth in smaller domestic hot water tanks. The high limit temperature setting should be around 190 degrees and the standard hot water operating pressure around 20 psi. Consequently osha recommends the minimum water heater outlet temperature in residential systems to be set at 130 degrees f to produce a faucet temperature of at least 120 degrees f. Boilers constructed in accordance with section iv heating boilers of the asme boiler and pressure vessel code can be operated with water temperature up to 250 f with a maximum design pressure of 160 psig.
If it is less adjust your hot water boiler upwards. Hot water is normally supplied to fittings and their consumers at 50 60 oc. For most homes it s 120 degrees fahrenheit. It will also prevent the boiler water from getting too cold.
Consequently the minimum water heater outlet temperature in residential systems should be set at 54c to produce a tap temperature of at least 49c. Test your water temperature. Hot water should not be stored at temperatures below 60 oc 140 of to avoid the risk of legionella contamination. However there is less danger of bacterial growth in smaller domestic hot water tanks.
The water should be a minimum of 120 degrees fahrenheit. If you use the boiler for domestic hot water you will have a low limit setting on your aquastat. This ensures hot water is available when you need it for a shower or washing the dishes. Let s get this out of the way first.
If the temperature is well above 120 degrees you can safely adjust your hot water heater downward slightly before testing again to be sure you maintain the. The combustion chamber shall be fully lined with lightweight high temperature ceramic er insulation rated to 2 300ツーf 1260ツーc the jacket panels shall be powder coated with a baked on ish which is suitable for outdoor service. Hold a cooking thermometer in the water and take a temperature reading.