Bradford White UCG100H199 Installation & Operation Manual page 7

Temperature and Pressure Relief Valve
Keep clear of combination temperature and pressure relief valve discharge line outlet. The discharge may be
hot enough to cause scald injury. The water is under pressure and may splash.
For protection against excessive temperatures and pressure, install temperature and pressure protective equipment
required by local codes; not less than a combination temperature and pressure relief valve certified by a nationally
recognized testing laboratory that maintains periodic inspection of production of listed equipment or materials as meeting
the requirements of the Standard for Relief Valves and Automatic Gas Shutoff Devices for Hot Water Supply Systems,
ANSI Z21.22 and the Standard CAN1-4.4 Temperature, Pressure, Temperature and Pressure Relief Valves and
Vacuum Relief Valves. The combination temperature and pressure relief valve must be marked with a maximum set
pressure that does NOT exceed the maximum working pressure of the water heater. The combination temperature and
pressure relief valve rating must NOT be less than the hourly rating of the water heater.
Install the combination temperature and pressure relief valve into the opening provided and marked for this purpose on
the water heater.
Note: Some models may already be equipped or supplied with a combination temperature and pressure relief valve.
Verify that the combination temperature and pressure relief valve is in compliance with local codes. If the combination
temperature and pressure relief valve does not comply with local codes, replace it with one that does. Follow the
installation instructions above on this page.
Install a discharge line so that water discharged from the combination temperature and pressure relief valve will exit
within 6 in (15.2 cm) above, or any distance below the structural floor and cannot contact any live electrical part. The
discharge line is to be installed to allow for complete drainage of both the combination temperature and pressure relief
valve and the discharge line where it will NOT damage property. The discharge opening must NOT be subjected to
blockage or freezing. DO NOT thread, plug, or cap the discharge line. It is recommended that a minimum clearance of 4
in (10.2 cm) be provided on the side of the water heater for servicing and maintenance of the combination temperature
and pressure relief valve.
DO NOT place a valve between the combination temperature and pressure relief valve and the tank.
Hydrogen gas can be produced in an operating water heater that has not had water drawn from the tank for a long
period of time (generally two weeks or more). HYDROGEN GAS IS EXTREMELY FLAMMABLE. To prevent the
possibility of injury under these conditions, we recommend the hot water faucet to be open for several minutes at the
kitchen sink before you use any electrical appliance which is connected to the hot water system. If hydrogen is present,
there will be an unusual sound such as air escaping through the pipes as hot water begins to flow. DO NOT smoke or
have open flame near the faucet at the time it is open.
Sacrificial Anodes
Three sacrificial anode rods have been installed in the tank head to extend tank life. The anode rods should be
inspected periodically for corrosion and replaced when necessary to prolong tank life. Water conditions in your area will
influence the time interval for inspection and replacement of the anode rods. The use of a water softener may increase
the speed of anode consumption. More frequent inspection of the anodes is needed when using softened (or phosphate
treated) water. In areas where water is unusually active, an odor may occur at the hot water faucet due to a reaction
between the sacrificial anode and the impurities in the water. If this should happen, alternative anodes may be
purchased from the supplier that installed this water heater. This will minimize the odor while protecting the tank.
Additionally, the water heater should be flushed with appropriate dissolvers to eliminate any bacteria.
The removal of these anodes, except for inspection and/or replacement, will nullify the warranty. Contact the installing
contractor or service provider that installed the water heater, or the manufacturer listed on the rating plate for anode
replacement information.
WARNING
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