Section II: General Information (cont..)
anode rods
The anode rod is used as a sacrificial element within the volume of the storage tank. The purpose of the magnesium anode rod is to protect the inside of the tank against corrosion. Anode rods should be inspected twice in the first year and at least yearly once a time interval for inspection has been developed. Water conditions can influence the consumption rate of the anode rods. Please see the Maintenance section of this manual for instructions on how to change the anode rods in your Rheem indirect water heater.
CAUTION: Hydrogen gas is produced in a hot water system served by this indirect water heater that has not been used for a long period of time (2 weeks or more). Hydrogen gas is extremely flammable. To reduce the risk of injury under these conditions, it is recommended that the hot water faucet be opened for several minutes at the kitchen sink before using any electrical appliance connected to the hot water system. When hydrogen is present, there will probably be an unusual sound such as air escaping through the pipe as the water begins to flow. There should be no smoking or open flame near the faucet at the time it is open (UL 174).
Temperature and pressure relief value (t&P)
The T&P valve is factory installed. A discharge drain tube must be installed (responsibility of the installer) and shall terminate plain, not threaded, 6 inches above the floor drain. The drain tube material must be approved for temperatures of 120°F or greater, and a pressure of 150 PSI or greater.
back-flow preventor (closed loop system)
Some local municipal codes and ordinances require the use of these devices on potable (domestic) water lines. Where
NOTICE: Working pressure of the indirect water heater is 150 PSI. Do not exceed 150 PSI.
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