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SAMPLE SPECIFICATIONS
The heater(s) shall be A.O. Smith Dura-Power Commercial Electric Model Number ___________________ or an approved
equal. Heater(s) shall be rated at _______ KW, _______ V, _______ phase, 60 cycle AC. The heater shall be for (vertical/
horizontal) installation with lifting lugs and channel skid base. Vessel shall be constructed to Section IV of the ASME Code for
125 psi working pressure. Vessel shall be glass-lined with anodic protection. Entire vessel and electrical controls are to be
encased in a rectangular sheet metal enclosure with baked enamel finish. Tank to be insulated with fiber glass insulation.
Separate 2" dial type temperature gauge will be mounted on the front of the enclosure. Enclosure to have hinged locking door
over electric controls. There shall be ____________ individually replaceable _______ KW, 4 bolt flange mounted, incoloy
sheathed heating elements each complete with prewired terminal leads. These elements will be switched by magnetic contactors
which are operated by a 120V fused control circuit protected by manual reset high limit. Control circuit is activated by a master
pilot switch and electronic low water cutoff. The thermostatic control of the contacts shall be in _______ stages through solid
state modulating step control which will balance the water heating input to the demand. This control shall prevent the entire
electrical load from being switched on instantaneously. The control shall have even load progressive sequencing which utilizes
the "first on, first off" principle thereby equalizing the operating time of heating elements and contactors. Each magnetic contactor
and heating element circuit will be protected by a maximum of 60 amp cartridge type fuses with a minimum of 100,000 amp
interrupting capacity. The entire water heating package shall be prewired to solderless terminal lugs, factory tested, complete
with ASME temperature and pressure relief valve and bear the Underwriters' Laboratories label. Heater(s) shall have a 3 year
limited warranty as outlined in the written warranty. Fully illustrated instruction manual included.
ACESS00607
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