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GENERAL
Provide a quantity of ________packaged steam fired water heater(s) Model No. ___________________as manufactured
by HUBBELL Electric Heater Co., Stratford, CT. The pressure vessel shall be mounted on structural supports and be suitably insulated, jacketed, painted, and provided with lifting lugs. The entire unit is to be packaged ready for
water and steam service connections. PRESSURE VESSEL
The pressure vessel shall be all welded construction and ASME Code Section VIII stamped for a
working pressure of 125 psi (rOptional Specification: ________ psi )
and contain a minimum of__________ gallons of storage. The storage vessel shall be carbon steel and lined with seamless Hydrastone cement to a minimum thickness of 5/8" on 100% of all interior tank surfaces (rOptional Specifications: Phenolic lined steel tank, Hot dipped
galvanized steel tank, Flame spray copper coated steel tank, 3lb/Sq Ft Copper lined steel tank, solid Type 304 or 316L Stainless steel tank, solid Copper-silicon tank, solid 90/10 Copper-nickel tank ). The pressure
vessel is to be completely covered with 2" thick "E" type energy conservation fiberglass blanket insulation and enclosed in a heavy gauge galvanized steel metal jacket finished in gray hammertone enamel. The vessel shall be
protected by an ASME approved automatic reseating combination temperature and pressure relief valve set at the tank WP and 210oF. HEATING COIL
The heating coil shall be rated to heat ________GPH of water at a ________ oF Rise (__________o to_________oF ) when supplied with________ psi steam to the
control valve and consume__________________ lbs./hour steam.The heating coil shall be a fully removable immersion U-tube heating coil rated for 150psi working pressure. The single wall (
rOptional Specification: Double Wall ) coil shall be constructed from 20 gauge 3/4
" OD copper (rOptional Specifications: 90/10 Copper-nickel, Admiralty, Stainless steel )
tubes. The coil including the tube sheet, baffles, and spacers shall have all non-ferrous wetted parts and a fabricated steel head. (rOptional Specifications:
Fabricated Stainless steel head, Fabricated Copper-alloy head ). CONTROLS
The water heater shall (shall not) be supplied with steam operating controls. A self-contained (rOptional Specifications: Pneumatic, Pilot, Electronic
)
type steam control valve shall regulate the flow of steam to the heating coil in order to control water temperature. A drip trap, main condensate trap, Y strainers, vacuum breaker, and steam pressure gauge shall be factory sized and piped with the steam control valve.
In addition, the water heater may be supplied with the following optional features:
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Option Domestic water dial temperature and pressure gauge shall be factory installed.
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Option The water heater shall be equipped with a factory packaged intra-tank circulator to constantly circulate water within the tank to reduce stratification.
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Option The heating coil shall be wrapped and baffled and piped with an integral pump package to force circulate water over the heating coil in order to reduce the coil
size.
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Option Single solenoid safety system to close the steam supply to the heating coil should the water temperature in the tank reach the hi-limit set point. Requires 5
Amp, 120 Volt service.
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Option Double solenoid safety system dumps over heated water in the storage tank to drain in addition to closing the steam supply to the control valve. Requires 5 Amp,
120 Volt service.
WARRANTY
The water heater manufacturer shall warranty all components against defects in workmanship and material for a period of one (1) year from date of
start-up, and the pressure vessel for a full five (5) years Non Pro-Rated (rOptional Specification: full ten (10) years Non Pro-Rated )
from date of start-up, provided that the unit is started within three (3) months of date of shipment and installed and operated within the scope of the tank design and operating capability. Each water heater shall be shipped with a complete set of installation and operating instructions including spare parts list and approved drawing.
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