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figure 25.
deliming solVents
uN•lIme is recommended for deliming. uN•lIme is a patented
food grade acid which is safe to handle and does not create the
harmful fumes which are associated with other products.
uN•lIme may be obtained from your dealer, distributor or
water heater manufacturer. Order Part Number 9005416105,
1 gallon, packed 4 gallons per case or Part Number 9005417105,
5 gallon container.
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 drain valve
and allow two gallons of water to drain from 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.
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.
Chemical Hazard
• 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 pressure relief valve while heater is draining. NOTe:
Do not replace pressure relief valve until deliming is completed.
Pressure 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 pressure 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 container to cover the valve and allow
space for foaming. When foaming stops, run fresh cool water into
the container and rinse the pressure 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.
30
Explosion Hazard
Flammable hydrogen gases
may be present.
Keep all ignition sources away
from faucet when turning on
hot water.
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