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UN•LIME® and the booklet may be obtained through your State
dealer or distributor.
FIGURE 18
DELIMING SOLVENTS
State recommends the use of UN•LIME 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 State
Water Heaters. Order part no. 4763 (1 gal), packed 4 gallons
per case or part no. 4813 (5 gallon container).
Hydrochloric base acids are not recommended for use on glass-
lined tanks.
CAUTION
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:
1. Drain heater.
2. Remove outer cover plate from lower side of heater jacket.
3. Remove six (6) hex head screws securing tank cleanout plate
and remove plate.
4. Remove lime, scale, or sediment using care not to damage
the glass lining.
5. Inspect cleanout plate gasket, if new gasket is required,
replace with State part no. 99038.
6. Install cleanout plate. Be sure to draw plate up tight by
tightening screws securely.
7. Replace outer jacket cover plate.
FIGURE 18
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, State UN•LIME Professional Delimer should
be used.
DELIMING USING FLO-JUG METHOD
UN•LIME in the 5 gallon size is recommended for deliming of
the SBD 120-500 models. UN•LIME with the necessary hoses
and fittings to delime your heater is also available as a kit:
Up-N-Down Transfer Kit. Contact your local State dealer or
distributor:
Telephone: (800) 433-2545
Fax: (800) 433-2515
Website: www.hotwater.com
Prepare the Water Heater
To delime the water heater using the Flo-Jug method, first
prepare the heater for deliming as described in the "Why? When?
and How?" booklet, Form No. 4800. Then install the long plastic
male adapter fitting into the drain valve opening of the water
heater. Use teflon tape and hand tighten only. Do not overtighten.
Prepare the Up-N-Down Transfer Kit
The next step is the preparation on the Up-N-Down Transfer Kit,
if you have not already done so: