Inspection And Cleaning; Re-Filling The System; Other Checks; Relief Valve - Lochinvar SST66 Installation, Commissioning, Maintenance And User Instructions

8.4 INSPECTION AND CLEANING

1. Drain the storage vessel.
2. Remove cover and gasket from cleanout opening.
3. Remove scale or sediment using care not to damage the vitreous enamel lining.
4. Inspect cleanout plate gasket and replace if necessary.
5. Install gasket and cleanout plate. Draw plate up square by tightening screws evenly.

8.5 RE-FILLING THE SYSTEM

1. Close the drain valve.
2. Open a hot water fixture to allow air to escape.
3. Open the cold water supply to water heater and allow the vessel to fill.
4. Check for water leakage.

8.6 OTHER CHECKS

8.6.1

RELIEF VALVE

At least once a year, the temperature and pressure relief valve and safety valve should be checked to
ensure that they are in operating condition. To check each valve, lift the lever or turn the screw cap at
the end of the valve several times. The valve should operate freely and seat properly.
If water does not flow, remove and inspect for obstructions or corrosion. Replace with a new valve of
the recommended size as necessary.
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