Components And Their Function; Preventative Maintenance - Rheem 613050 Service Instructions Manual

Temperature and Pressure Relief Valve
A valve designed to provide automatic relief by discharging water in case of excessive temperature, pressure
or both.
Never fit a T&PR Valve with a pressure rating greater than that indicated on the product-rating
label.
Pressure Limiting Valve (P.L.V.)
A valve that controls its outlet pressure to a predetermined limit.
Outlet Delivery Tube (Dip Tube)
A plastic tube installed in the hot water outlet of the water heater cylinder to conduct water from the highest
point to the outlet connection. It also acts as a fitting liner.
Diffuser
A plastic device installed in the cold water inlet of the water heater cylinder to assist with stratification. It also
acts as a fitting liner.
Fitting Liner
A plastic tube installed in the cold-water inlet of the water heater to provide protection against corrosion
through the life of the water heater.
Anode (Sacrificial)
A metal alloy electrode installed in the water heater cylinder that by galvanic action protects the cylinder from
corrosion.
Thermostat
A device, responsive to temperature, which controls the supply of electrical energy to the element to maintain
the stored water at the required temperature.
Over Temperature Energy Cutout (E.C.O.)
A temperature-sensing device in combination with the thermostat that automatically cuts off the supply of
electrical energy to prevent excessive water temperature occurring. This device will not reset automatically
but may be manually reset once temperatures have fallen to a safe level. DETERMINE CAUSE OF
OPERATION.
Heating Unit (Element)
A tubular device containing an electric resistance element that converts electrical energy to heat. Standard
ratings are 3.6, 4.8 and 6.0kW
It is suggested for peak performance that the water heater be serviced annually.
Check for discharge from the T&PR valve. When the elements are operating a small discharge of water
1.
may be evident. Operate the valve-easing lever to ensure the valve opens and resets properly. Always
open and close the valve gently. The T& PR valve should be replaced at 5 yearly intervals.
Check for leaks at all cylinder fittings.
2.
Check for signs of excessive corrosion on the water heater jacket.
3.
Isolate power to the water heater and check all electrical connections for signs of overheating due to poor
4.
connection.
Conduct an electrical insulation test on the water heater. (Refer to page 18)
5.
Check for sludge build up and if necessary drain and flush tank.
6.
TM014 Rheem Heavy Duty Electric Service Instructions REV: A
Date of Issue: 10/7/2002

COMPONENTS AND THEIR FUNCTION

PREVENTATIVE MAINTENANCE

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