Other Water Heaters 4 Ways to Order
Installation and service must be performed by a qualified installer or service
Ariston P10S & P15S
Specifications & Troubleshooting
||14" x 14" x 9.5"
||14" x 14" x 12"
|Recovery at a 90 F rise
|Relief Valve Opening
|Max. Operating Pressure
Please refer to the product installation manual
- 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
- 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.
- 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.
- Leave hot outlet tap at sink open while filling unit to displace all air in tank.
- If the water temperature is too hot the thermostat dial on the front of the unit should
be lowered by turning counter clockwise.
- If the water temperature is too cool the thermostat dial on the front of the unit should
be raised by turning clockwise.
- 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
UNIT STOPPED HEATING
- 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.
- 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
- 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.
- 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.
- 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.
- 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
- 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