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Installation and service must be performed by a qualified installer or service agency

Ariston P10S & P15S

Specifications & Troubleshooting

Specifications

Troubleshooting

Please refer to the product installation manual

INSTALLING UNIT

1. Piping connections to each water fitting should include a dielectric (insulated) fitting. This type of fitting will prevent corrosion between any dissimilar metals. See the product installation manual for the Diagram showing dielectric fittings
2. It's important that the plumbing before the heater not have any check valves or back flow preventors before the heater. These devices prevents the normal thermal expansion inside the water heater from travelling through the inlet piping. The thermal expansion increases the pressure in the tank putting stress on the pressure/temperature relief valve and heating element gasket and can cause a water leak.
3. Pressure/temperature relief valve sensing probe should not extend beyond 4 inches in length. If piping the relief valve to a suitable drain, be sure to use the same size diameter pipe as the relief valves outlet.
4. Leave hot outlet tap at sink open while filling unit to displace all air in tank.

ADJUSTING TEMPERATURES

1. If the water temperature is too hot the thermostat dial on the front of the unit should be lowered by turning counter clockwise.
2. If the water temperature is too cool the thermostat dial on the front of the unit should be raised by turning clockwise.
3. The indicator light located to the right of the thermostat dial will illuminate to indicate that the heater is heating. When operating the thermostat dial up or down you will hear a click when the indicator light goes off or on. This will help when setting the temperatures.

UNIT STOPPED HEATING

1. If the indicator light switch is on but does not illuminate when the thermostat dial is turned then first check that the unit is plugged into an operating outlet with a lamp or another appliance. If the outlet is functioning, unplug unit and remove front plate cover to access the reset button, which is located in the middle of the thermostat (brown box) behind the thermostat dial: on units manufactured after 1996 it will be marked by a blue button, prior to 1996 it will not be marked but rather have a small square opening, it is the smaller of two. Use a penpoint or small screw driver to reset it. Once reset, confirm that the thermostat works properly. Turn the temperature dial from high to low, if the red indicator light does not go off on the low setting then the thermostat should be replaced.
2. If indicator light works properly but there is no degree rise in water temperature after 30 minutes then the heating element should be replaced. See the product installation manual for the Diagram of unit showing heating element

WATER IS LEAKING FROM HEATER

1. If water is leaking at either water fitting connection then the fitting should be inspected and possibly replaced. Dielectric fittings are required to prevent corrosion between dissimilar metals. See the installation manual for the Diagram showing dielectric fittings If the fittings appear to be fine then the threaded inlet and outlet openings to heater, which are part of the inner steel tank, may be damaged from electrolysis. Again, dielectric (insulated) fittings should be used.
2. If water is relieving from the pressure/temperature relief valve then that device should be inspected as well as the buildings inlet water pressure. Proper valves for this heater will be rated for a maximum water pressure of 150 psi and a water temperature of 210 F. Also the temperature probe that drops into the tank should not extend beyond 4 inches to maintain adequate distance from the heating element. Confirm that the thermostat works properly by observing the indicator light during heating. Once the temperature setting is reached the indicator light should go out to prevent overheating. Symptoms of a defective thermostat consist of leaking water from the pressure/temperature relief valve and tripping of the thermostat reset button.
3. If water is leaking from the front of the unit then the heating element gasket should be inspected. Unplug unit and remove front cover to access. See the product installation manual for the Diagram of unit showing heating element gasket Replace if torn.
4. If above items are not applicable and the water leak comes from any other location on the tank then the entire unit will need to be replaced.

WATER IS DISCOLORED

1. The magnesium anode rod in the heater is a piece of soft metal that will slowly deteriorate during use. The rate of deterioration depends on water quality. It is important to inspect and replace it when it is spent to prevent discoloring of water and potential damaging to the steel tank. Unplug power cord and remove front cover panel to access anode rod. See the installation manual for Locating and replacing anode rod