TM074: Stainless Steel Electric Water Heater Service Instructions
REV AB Issued: 07/16
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6
PREVENTATIVE MAINTENANCE
Annual Service
It is suggested for peak performance that the water heater be serviced annually.
1. Check for discharge from the TPR valve. When the element is operating a small
discharge of water may be evident. Operate the valve-easing lever to ensure the valve
opens and resets properly. Always open and close the valve gently.
2. Check for discharge from the ECV if fitted. When the element is operating a small
discharge of water may be evident. Operate the valve-easing lever to ensure the valve
opens and resets properly. Always open and close the valve gently.
3. Check for leaks at all tank fittings.
4. Check for signs of excessive corrosion on the water heater jacket.
5. If an overflow tray is installed, check to ensure the overflow tray drain pipe is not
blocked.
6.
Isolate power
to the water heater and check all electrical connections for signs of
overheating due to poor connection.
7. Conduct an electrical insulation test on the water heater (refer to
“Electrical Insulation
Testing” on page 24).
Major Five Year Service
It is recommended that a major five year service be conducted on the water heater.
1. Replace Temperature & Pressure Relief (TPR) valve.
2. Inspect and flush expansion control valve (if ECV fitted) and replace if required.
3. Check electric heating unit for excessive calcium build up or corrosion and replace
heating unit if required.
4. Visually check water heater for any potential problems.
5. Inspect all plumbing and electrical connections.