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HUBBELL
ELECTRIC HEATER COMPANY
45 SEYMOUR STREET
P.O. BOX 288
STRATFORD, CT 06615
PHONE: (203) 378-2659
FAX: (203) 378-3593
INTERNET: http://www.hubbellheaters.com
-- IMPORTANT --
Always reference the full model number and serial number when calling the factory.
WARNING / CAUTION
1. Tank is to be completely filled with water and all air is to be vented before energizing.
2. Due to the rigors of transportation, all connections should be checked for tightness before heater is placed in
operation.
3. Safety relief valve must be installed in tapping provided.
4. The refractory material used in heating elements may absorb some moisture during transit, periods of storage, or
when subjected to a humid environment. This moisture absorption results in a cold insulation resistance of less than
twenty (20) megohms. If this heater has been subjected to the above condition, each heating element must be
checked for insulation resistance before energizing. Contact the factory for a replacement element.
5. KEEP AWAY FROM LIVE ELECTRICAL CIRCUITS.
Do not perform any maintenance, make any adjustments, or replace any components inside the control panel with
the high voltage power supply turned on. Under certain circumstances, dangerous potentials may exist even when
the power supply is off. To avoid casualties, always turn the power supply safety switch to off, turn the charge or
ground the circuit before performing any maintenance or adjustment procedure.
6. The unit is designed to operate at pressure not more than 150 psi.
7. Generalized instructions and procedures cannot anticipate all situations. For this reason, only qualified installers
should perform the installations. A qualified installer is a person who has licensed training and a working
knowledge of the applicable codes, tools, equipment, and methods necessary for safe installation of an electric
resistance water heater. If questions regarding installation arise, check your local plumbing and electrical inspectors
for proper procedures and codes. If you cannot obtain the required information, contact the company.
8. Water Quality Requirements – Recommended water hardness is 4 to 6 grains of hardness per gallon (GPG).
Water hardness above 6 GPG should be treated by a water conditioner (water softener or in-line treatment).
Water hardness below 4 GPG also requires treatment to reduce potential corrosion. Excessive GPG will result
in higher operating and maintenance costs and will reduce product longevity. Chlorides must not exceed 50 parts
per million (ppm). Excessive chlorides will result in metallic corrosion and will reduce product longevity.
Water treatment has been shown to reduce costs associated with de-liming the booster as well as reducing
metallic corrosion. Product failure caused by these conditions is not covered under warranty. See warranty for
complete details.
9. This water heater is not intended for space heating applications.
10. The water heater is factory set at 185°F for booster water heating applications. This results in the possibility of a
scalding water injury. A full thickness skin burn can occur in less than one second of exposure to water at this
temperature.
(27 pages)
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