Tank Cleanout Procedure; Deliming Using Flo-Jug Method - Lochinvar CLN 120080 Instruction Manual

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.
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.
Explosion Hazard
Flammable hydrogen gases
may be present.
Keep all ignition sources away
from faucet when turning on
hot water.
Chemical Hazard
• Product contains phosphoric acid.
• Keep out of reach of children.
• Use rubber or neoprene gloves.
UN•LIME 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.
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