State Industries SUF-130- 300/400/500 Powered Anode Rods, Drain Valve and Access Panels

See TABLE 15 for part numbers.

TABLE 15

UN-LIME® Professional Delimer

Part Number	Description
9005416105	4 - 1 gallon (case)
9005417105	1 - 5 gallon

Powered Anode Rods

To insure a long, trouble-free operating life, the water heaters covered in this manual are factory equipped with a powered anode system. The anode rods (2) are of a permanent design and do not need replacing unless damaged. Inspection and cleaning should be performed once a year.

Note: Follow the instructions to drain the water heater storage tank on page 62 first. Remove the powered anodes from the water heater by loosening the 3/4" NPT bushing that forms the top of the anodes. Do not disassemble the retaining nut and wire terminal from the top while installed in the water heater, the anode's electrode may fall inside the tank. Remove the entire anode rod from the water heater prior to inspection. Clean the anode rods with a soft cloth and reinstall. Follow the instructions for filling the water heater on page 62 when finished.

Drain Valve and Access Panels

The water heaters covered in this manual are equipped with a drain valve, see Features And Components on page 62 for location. The water heaters covered in this manual are also equipped with a cleanout opening for sediment and lime scale removal. See Figure 59 on page 62.

Temperature-Pressure Relief Valve Test

Burn hazard.

Hot water discharge.

Keep clear of Temperature- Pressure Relief Valve discharge outlet.

It is recommended that the Temperature-Pressure Relief Valve should be checked to ensure that it is in operating condition every 6 months.

When checking the Temperature-Pressure Relief Valve operation, make sure that (1) no one is in front of or around the outlet of the Temperature-Pressure Relief Valve discharge line, and (2) that the water discharge will not cause any property damage, as the water may be extremely hot. Use care when operating valve as the valve may be hot.

To check the relief valve, lift the lever at the end of the valve several times, see Figure 60. The valve should seat properly and operate freely.

If after manually operating the valve, it fails to completely reset and continues to release water, immediately close the cold water inlet to the water heater and drain the water heater, see Draining And Flushing on page 62. Replace the Temperature-Pressure Relief Valve with a properly rated/sized new one, see Temperature- Pressure Relief Valve on page 62 for instructions on replacement.

TEMPERATURE-PRESSURE

RELIEF VALVE

DISCHARGE PIPE

Figure 60

If the Temperature-Pressure Relief Valve on the water heater weeps or discharges periodically, this may be due to thermal expansion.

Note: Excessive water pressure is the most common cause of Temperature-Pressure Relief Valve leakage. Excessive water system pressure is most often caused by "thermal expansion" in a "closed system." See Thermal Expansion and Closed Water Systems on page 62. The Temperature-Pressure Relief Valve is not intended for the constant relief of thermal expansion.

Temperature-Pressure Relief Valve leakage due to pressure build up in a closed system that does not have a thermal expansion tank installed is not covered under the limited warranty. Thermal expansion tanks must be installed on all closed water systems.

Do not plug the Temperature-Pressure Relief Valve opening. This can cause property damage, serious injury or death.

Explosion Hazard

Temperature-Pressure Relief Valve must comply with ANSI Z21.22- CSA 4.4 and ASME code.

Properly sized temperature- pressure relief valve must be installed in opening provided.

Can result in overheating and excessive tank pressure.

Can cause serious injury or death.

Vent System

Examine the vent system once a year. Points of inspection are as follows:

1.Check for obstructions and/or deterioration of the intake air and/or vent piping and the intake air and vent terminations. Replace immediately where needed.

2.The debris screens in the intake air and vent terminations should be should be cleaned of foreign material and soot. See Figure 22 on page 62.

Note: Do not reach inside the vent hood when the heater is in operation.

3.Check all vent system connections for leakage and repair or reseal as necessary.

62