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8 Cards in this Set
- Front
- Back
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List the four safety controls found on all hydronic systems |
Pressure relief valve high temperature limit switch low water cut off backflow preventer |
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What is the normal operating pressure in a boiler |
12 to 15 psi |
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What is the normal setting on the pressure release valve |
30 PSI |
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Where is the pressure relief valve located |
Top of the boiler |
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Where does the pressure relief valve discharge |
18 inches above the floor |
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What is the common temperature setting for the high temperature limit switch |
210 degrees |
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What is the purpose of the low water cut out switch on a residential boiler |
it will turn off boiler if water level drops which is dangerous because it can overheat the water crack the heat exchanger to put Steam in the pipes |
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What is the safety control that prevents us from getting superheated water in a boiler system |
Pressure relief valve |
