10 Maintenance
The water heater needs maintenance at least once a year. The maintenance interval is
determined by the water quality, the average burning time each day and the set water
temperature.
On the operator interface, the maintenance interval can be set as a reminder. The display
shows SERVICE REQUIRED when the pre-set interval has elapsed.
To determine the correct interval, A.O. Smith recommends to do a system check on both
the water and the gas side, three months after installation.
Note
Do maintenance to maintain an effective and efficient transfer of heat to the water. This
significantly increases the service life of the water heater.
Note
When needed, spare parts can be ordered. To be sure that you receive the correct spare
parts, look at the data plate for the full serial number, the water heater model, and the
used gas category. Use this information when you order the spare parts.
Do the following maintenance activities:
Preparation (see section 10.1)
Water side maintenance (see section 10.2)
Gas side maintenance (see section 10.3)
Finalization (see section 10.4).
10.1 Preparation
To test whether all components are still working properly, complete the following steps:
Activate the MENU with [ ].
Use [
] and [ ] to place the cursor beside OFF.
Confirm OFF with [ENTER].
Wait until the fan has stopped. The icon is then dimmed.
Caution
Failure to wait until the fan stops can cause damage to the water heater.
Switch the appliance OFF (position 0) using the control switch on the operator
interface.
Switch the controller ON by setting the control switch to position I.
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