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MAINTENANCE SCHEDULE
Following are the instructions for performing some of the recommended maintenance. Unit inspection and adjustment
should be performed by a competent technician.
Suggested Maintenance Schedule
COMPONENT OPERATION INTERVAL REQUIRED
Tank Sediment Removal Monthly Flushing
Anode Rods Inspect Semi-Annually Replace as Required
Relief Valve Check Operation Semi-Annually Proper Operation
Blower Clean Inlet Screen As Required Soft Brush
Vent & Air Intake System Inspect Every 3 Months Joints should be sealed
Ignition System Inspect Annually Clean of dust and dirt
Vent Terminal Free of Shrubs & Debris Monthly
Remove object that caused
restriction
Combustion System Inspect Monthly Confirm S-OP
Condensate Line Inspect Monthly Remove restriction
Table 5.
FLUSHING WATER HEATER
1. Turn OFF the water heater electrical disconnect switch.
2. Open the drain valve and allow water to flow until it runs clean.
3. Close the drain valve when finished flushing.
4. Turn ON the water heater electrical disconnect switch.
DRAINING WATER HEATER
The water heater must be drained if it is to be shut down and exposed to freezing temperatures. Maintenance and service
procedures may also require draining the water heater.
1. Turn off the water heater electrical disconnect switch.
2. Connect a hose to the drain valve.
3. Locate hose’s discharge in an area where hot water will not cause any damage or injury.
4. Close the cold water inlet valve to water heater.
5. Open a nearby hot water faucet to vent the system.
6. Open the heater drain valve.
7. If the water heater is being drained for an extended shutdown, it is suggested the drain valve be left open during this
period.
FILLING WATER HEATER
1. Close the water heater drain valve by turning the knob or valve stem clockwise. If alternative water connections are
provided but not used, make certain they are plugged (i.e. rear connections).
2. Open the cold water supply shut-off valve.
3. Open several hot water faucets to allow air to escape from the system.
4. When a steady stream of water flows from the faucets, the water heater is filled. Close the faucets and check for
water leaks at the water heater drain valve, combination temperature and pressure relief valve and the hot and cold
water connections.
SEDIMENT AND LIME SCALE REMOVAL
Waterborne impurities consist of the particles of soil and sand, which settle out and form a layer of sediment on the
bottom of the tank.
The amount of calcium carbonate (lime) released from water is in direct proportion to water temperature and usage. The
higher the water temperature or water usage, the more lime deposits are dropped out of the water. This is the lime scale,
which forms in pipes, water heaters and on cooking utensils.
Lime accumulation not only reduces the life of the equipment but also reduces efficiency of the water heater and
increases fuel consumption.