IBC INTERSTAR IWT Series, Инструкция по установке и эксплуатации

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6.0 Maintenance
The appliance will provide many years of reliable operation. Be aware that components such as sensors
and relief valves may require replacing and servicing. Depending on the quality of the water supply,
sediment and/or scale may coat the heating coil in the tank and reduce the hot water recovery rate.
Failure to use the correct procedures or parts could result in unsafe operation. Owners should arrange
follow-up inspections and simple maintenance procedures according to IBC's suggested maintenance
schedule below.
For service or repairs to the water heater, call your heating contractor. Your water heater has been
manufactured to provide years of service. To insure proper service, the following information is provided
to enable the installation, operation, and maintenance of this water heater. When the installation is
completed, keep this manual with the water heater.
Maintenance Required Frequency Check
Boiler and Domestic Water Piping: Check all piping for signs of leakage at the
joints, unions and shut-off valves. Repair as required. Annually
□
Temperature and pressure relief valve Annually
□
Sediment: Depending on water conditions, a varying amount of sediment may
collect in the tank. Levels requiring service are indicated by a small
temperature difference between the boiler supply and return lines, and a
reduced recovery rate. Repeated flushing typically clears such material. As a
preventive measure, draw water from the drain valve until it runs clear and
consider installing a water filter. Annually -
more
frequently in
hard water
areas
□
Scale: Hard water may cause scale buildup on the outside of the heating coil
inside the tank. A water softener can help prevent this problem. Symptoms are
identical to sediment buildup. If repeated flushing does not resolve the
problem, chemical cleaning may be required. Annually
□
6.1 Chemical cleaning of the heating coil
6.1.1 Flushing the tank
1. To avoid water damage, shut off the cold water supply to the water heater.
2. Make a note of the DHW temperature control setting on the IBC control, and turn off the power to
the boiler and water heater.
3. To reduce the risk of scalding, reduce the water pressure in the tank by opening a hot water
faucet.
4. Remove the relief valve from the water heater.
5. Drain ⅓ of the water heater so that the tank is two-thirds full. The water level must cover the coil
and the thermostat well.
6. Using a funnel, pour one gallon of commercial ice maker cleaning solution into the tank through
the relief valve opening.