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WATER REQUIREMENTS
Proper water quality can improve the taste of the food prepared in the oven, reduce liming in the steam
generator, and extend equipment life. Local water conditions vary from one location to another. The
recommended proper water treatment for effective and efficient use of this equipment will also vary
depending on the local water conditions. Ask your municipal water supplier for details about your local
water supply prior to installation.
Recommended water hardness is 2.0 to 4.0 grains of hardness per gallon with pH from 7.0 to 8.0.
Chlorides must not exceed 30 parts per million. Water hardness above 4.0 grains per gallon should
be treated by a water conditioner (water softener or in-line water treatment). Water hardness below
2.0 grains per gallon may also require a water treatment system to reduce potential corrosion. Water
treatment has been shown to reduce costs associated with machine cleaning, reduce deliming of the
steam generator, and reduce corrosion of metallic surfaces in the steam generator.
Water supplies vary from one location to another. A local water treatment specialist should be
consulted before installing any steam generating equipment.
The Kleensteam
®
system by Everpure is an available Hobart accessory. The Kleensteam system is
a passive chemical feeder that modifies the water supply by addition of a non-toxic chemical which
increases the acidity of water, reducing the alkalinity. This generally allows the steam generator to
run cleaner and require less frequent deliming. Kleensteam reduces the chemical taste and odor of
chlorine and filters out small particulates. The cartridge needs to be replaced every six months.
Sediment, silica, excess chlorides, or other dissolved solids may lead to a recommendation for
alternate form(s) of water treatment. Consult with a water treatment specialist and your Hobart Sales
office for specific recommendations.
PLUMBING CONNECTIONS
WARNING: PLUMBING CONNECTIONS MUST COMPLY WITH APPLICABLE SANITARY, SAFETY
AND PLUMBING CODES.
WATER SUPPLY CONNECTIONS (Fig. 2)
Connect treated potable water (hot or cold) to the inlet labeled for treated water to supply the steam
generator tank and humidifier. Untreated water contains scale producing minerals which, if supplied
to the steam generator, can precipitate onto the surfaces in the steam generator tank. Due to the
temperatures in the tank, the minerals can bake onto the surfaces and components. This can result
in early component failure and reduced product life. Sensors in the steam generator tank use ions in
the water to detect the water level. Do not use distilled (fully demineralized or de-ionized) water as this
could provide a false reading to the sensors. Strainers and filters will NOT remove minerals from the
water.
Connect untreated potable water (must be cold) to the inlet labeled for untreated water to supply the
condenser which cools the drain water.
Both external-threaded nylon inlets (
3
/4" NSHT - National Straight Hose
Thread) are located at the rear of the oven. The nylon threads should be
treated carefully so the connections do not leak. A manual shutoff valve
should be provided, convenient to the oven, for each water supply line; both
of these valves should be open when the oven is in operation. Water
pressure for both incoming water lines should be between 20 and 80 psig.
Refer also to CLEAN CYCLE DELIMING PROCEDURE, page 29.
Water Supply Inlets . . .
at Bottom Rear Corner of Oven
. . . Model HCE6H Shown.
Fig. 2