When the heater is operating at full capacity, or full gas input, it should consume 1 cu. ft. of gas in time indicated on Table 9.
VENTING SYSTEM
Examine the venting system every six months for obstructions and/or deterioration of the vent piping.
Remove all soot or other obstructions from chimney which will retard free draft.
problem persists, chlorination of the heater and replacement of the factory installed magnesium anodes with aluminum anodes may correct the condition.
Occasionally water softener companies recommend removal of heater anodes for odor reasons.
CAUTION
Unauthorized removal of the anode(s) will void the warranty. For further information contact your dealer.
REMOTE STORAGE TANK
TEMPERATURE CONTROL
The water temperature in the remote storage tank (if used) is controlled by the storage tank temperature control. The sensing element is mounted in the hot water storage tank, see page 13.
A change in water temperature in the storage tank lower than the tank temperature control setting will cause the sensor to activate the circulating pump. The pump then circulates the water through the heater where the thermostat senses the drop in water temperature and activates main burner operation of the appliance. If the storage tank temperature control is out of calibration, replace with new control.
WARNING
SHOULD OVERHEATING OCCUR OR THE GAS SUPPLY FAIL TO SHUT OFF, TURN OFF THE MANUAL GAS CONTROL VALVE TO THE APPLIANCE.
RELIEF VALVE
At least once a year, the temperature and pressure relief valve should be checked to ensure that it is in operating condition. Lift the lever at the top of the valve several times until the valve seats properly and operates freely.
If the appliance installation includes other relief valves, such as in “remote” storage tanks etc., check their relief valve operation with the same frequency.
WARNING
THE WATER PASSING OUT OF THE VALVE DURING THIS CHECKING OPERATION MAY BE EXTREMELY HOT. AVOID CONTACT AND DISCHARGE SAFELY TO PREVENT WATER DAMAGE.
If the temperature and pressure relief valve on the heater discharges periodically or continuously, a problem exists. This may be due to unusually high water temperatures or pressures in the system, or to a faulty relief valve. Contact your dealer or a qualified service technician to find the cause of the problem and to correct it. This may also be due to thermal expansion in a closed water supply system. Contact the water supplier or local plumbing inspector on how to correct this situation. DO NOT PLUG THE TEMPERATURE AND PRESSURE RELIEF VALVE.
WARNING
SHOULD OVERHEATING OCCUR OR THE GAS SUPPLY FAIL TO SHUT OFF, TURN OFF THE MANUAL GAS CONTROL VALVE TO THE APPLIANCE.
HOT WATER ODOR
On occasion, hot water may develop a strong odor. If this occurs drain the heater completely, flush thoroughly, and refill. If the
ANODE ROD INSPECTION
The heater tank is equipped with anode rods to provide corrosion control. At least once a year the anode rods should be checked to determine if replacement is necessary. Initially the anode rods are approximately 7/8" in diameter with a 1/8" diameter steel core wire running down the center of the anode material. THE ANODES SHOULD BE REPLACED when the 1/8" diameter core wire is visible as this means that the anode material has been expended in the control of corrosion.
For models with top inlet and outlet, it is recommended that, before removing the inner cover for cleaning, inspection or removal of inner parts, you obtain two new nipple collars, part no. 74060. The nipple collars on the heater will usually be damaged when removed. New pipe collars will insure that the seal is such as to prevent leakage of flue products when properly installed.
NOTE: Anode rod inspection may need to be made more frequently in areas subject to acid rain that obtains their water supply from surface water as the low pH will accelerate anode activity.
CAUTION: Close cold water inlet valve serving heater and open nearby hot water faucet to relieve the pressure in the heater before attempting to remove anode(s) for inspection.
FLUSHING
1.Turn off the heater electrical disconnect switch.
2.Open the drain valve and allow water to flow until it runs clean.
3.Close the drain valve when finished flushing.
4.Turn on the heater electrical disconnect switch.
DRAINING
The heater must be drained if it is to be shut down and exposed to freezing temperatures. Maintenance and service procedures may also require draining the heater.
1.Turn off the heater electrical disconnect switch.
2.Close the cold water inlet valve to heater.
3.Open a nearby hot water faucet to vent the system.
4.Open the heater drain valve.
5.If the heater is being drained for an extended shutdown, it is suggested the drain valve be left open during this period.
•Follow FILLING instructions when restoring hot water service.
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