Chemical Hazard

NOTE: Un•Lime is not available for use in Canada.

Hydrochloric base acids are not recommended for use on glass lined tanks.

Observe handling instructions on label of product being used.

Tank Cleanout Procedure

The following practices will ensure longer life and enable the unit to operate at its designed efficiency:

1.Once a month the heater should be flushed. Open the drain valve and allow two gallons of water to drain from the heater. Inlet water valve should remain open to maintain pressure in tank.

2.A cleanout opening is provided for periodic cleaning of the tank. Gas must be shut off and heater drained before opening cleanout.

To clean heater through cleanout opening, proceed as follows:

3.Drain heater.

4.Remove outer cover plate from lower side of heater jacket.

5.Remove six (6) hex head screws securing tank cleanout plate and remove plate.

6.Remove lime, scale, or sediment using care not to damage the glass lining.

7.Inspect cleanout plate gasket, if new gasket is required, replace with part no. 9004099215.

8.Install cleanout plate. Be sure to draw plate up tight by tightening screws securely.

9.Replace outer jacket cover plate.

In some water areas the sediment might not be removed by this method and may result in the water heater making rumbling or boiling noises. To dissolve and remove these more stubborn mineral deposits, UN•LIME Professional Delimer should be used.

Deliming Using Flo-Jug Method

UN•LIME in the 5 gallon size is recommended for deliming of all models. Contact your local dealer, distributor or water heater manufacturer.

Prepare the Water Heater

To delime the water heater using the Flo-Jug method, first prepare the heater for deliming.

Explosion Hazard

Flammable hydrogen gases may be present.

Keep all ignition sources away from faucet when turning on hot water.

Do not smoke or have open flame or sparks in vicinity of heater. Do not mix UN•LIME with other chemicals. Do not allow contact with magnesium, aluminum or galvanized metals.

• Product contains phosphoric acid.

• Keep out of reach of children.

• Use rubber or neoprene gloves.

Contains phosphoric acid. In case of external contact, flush with cool water. If irritation persists, get medical attention. If swallowed, give 1 or 2 glasses of water or milk and call physician.

Get immediate medical attention for eyes. Keep out of reach of children.

NOTE: THE USE OF RUBBER OR NEOPRENE GLOVES IS RECOMMENDED, ESPECIALLY IF YOU HAVE ANY OPEN SORES OR CUTS TO AVOID UNNECESSARY IRRITATION OR DISCOMFORT.

1.Turn off fuel and/or power supply to heater. Also, turn off power to any electrical device or equipment, which is attached, or part of the system.

2.Open hot water side of faucet closest to heater and allow water to run until it is cool enough to handle safely.

3.Close cold water inlet valve to heater.

4.Connect hose to drain valve at bottom of heater and start draining heater into suitable floor drain area.

5.Remove relief valve while heater is draining. NOTE: Do not replace relief valve until deliming is completed. Relief valve opening will also act as a vent in case of possible contact between the delimer and the anode rod(s), which may produce flammable hydrogen-air mixtures.

6.If relief valve appears to be limed-up, place it in a clean glass or plastic container adequate in size so that you can pour enough UN•LIME® into the container to cover the valve and allow space for foaming. When foaming stops, run fresh cool water into the container and rinse the relief valve for a few minutes.

7.If heater does not drain completely after a reasonable length of time, turn off the main water supply valve to stop water from entering the tank due to a by-pass problem or defective cold water inlet valve. Also, check for clogged drain valve opening. Heater must be completely drained before introducing UN•LIME.

8.Remove the cleanout cover and place a clean plastic bucket next to the cleanout opening.

Partially open the cold water inlet valve to allow time to accomplish the following and then close the valve.

While the water is being run through the tank, insert a stiff wire, copper tube flattened at one end or an opened wire coat hanger through the cleanout opening and scrape out any loose deposits of scale or sediment. This is an economical way to avoid unnecessary usage of the deliming solution.

Repeat the opening and closing of the cold water inlet valve as necessary but be sure the heater is completely drained when ready to introduce the UN•LIME.

Upon completion, reinstall the cleanout cover and use a new cleanout cover gasket (part number 9004099215). Remove the drain valve.