GENERAL
Provide a quantity of __________ packaged type indirect fired storage 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 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 sprayed 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 SECTION
The coil shall be rated to heat ________ GPH from ___________ oF to __________ oF when supplied with ______ GPM of boiler water (rOptional Specification: HTHW ) from _____ oF to ______ oF. The single wall
(rOptional Specification: double wall ) heating coil shall be constructed from 20 gauge, 3/4" O.D. copper tubes (rOptional Specifications: 90/10 Copper-nickel, admiralty, stainless steel )
with all non-ferrous wetted parts and designed for a maximum allowable working pressure of 150psi at 275oF (rOptional Specification:
400psi at 450oF ) maximum temperature. The coil head shall be fabricated steel (rOptional Specification: Copper Alloy
). CONTROLS
The water heater shall (shall not) be factory assembled and piped with a self-contained modulating three-way diverting valve
which will regulate the flow of boiler water to the heating coil and divert unused boiler water back to the loop (rOptional Specification: ON/OFF
modulating valve will regulate the flow of boiler water to the heating coil without diverting back to the boiler, thermostat to provide ON/OFF control of a boiler water pump ).
rOption Domestic water dial temperature and pressure gauge shall be factory installed.
rOption The water heater shall be equipped with a factory packaged intra-tank circulator to constantly circulate water within the tank to reduce stratification.
rOption 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.
rOption Single solenoid safety system to close the boiler water supply to the heating coil should the water temperature in the tank reach the hi-limit set point.
Requires 5 Amp, 120 Volt service.
rOption Double solenoid safety system dumps over heated water in the storage tank to drain in addition to closing the boiler water 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 a spare parts list and approved drawing.
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