General
Provide a quantity of _____ packaged type Marine Electric water
heater(s) Model No. ____________
as manufactured by HUBBELL The Electric Heater Co., Stratford, CT.
The water heater shall be constructed specifically for shipboard installation
by utilizing deck and bulkhead mounting supports that are integrally
mounted to the pressure vessel. The pressure vessel section, including
the electrical control panel, 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 plumbing and electric
service connections and shall bear the UL listing mark certifying the
entire water heater. The water heater shall conform to USCG regulations
and be ABS listed and approved.
Pressure Vessel
The pressure vessel shall be all welded construction and ASME Code
Section IV stamped for a working pressure of 100 psi and contain a
minimum of _______ gallons of storage. The storage vessel shall be
carbon steel and lined with seamless Hydrastone cement applied to a
minimum thickness of 5/8 " on 100% of all interior tank surfaces,
(Optional Specifications: Phenolic lined steel
tank, solid 90/10 copper- nickel tank, solid Type 304 or 316L Stainless
Steel Tank. ) The pressure vessel is to be completely covered with 2" thick
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 working pressure and 210
oF.
Electric Recovery
The recovery section shall be rated at _______ KW which will heat ________
GPH of water at ________ oF rise (________ oF to ________ oF).
Electric Controls
The heater shall be designed to operate at ________ volts, ________
phase, ________ HZ
with a fused low voltage transformer providing 120 volt to all operating
controls. The immersion heating element(s) shall be high quality
copper sheathed ( Optional Specification: Incoloy,
Type 304 or 316 stainless steel) and sized to obtain the rated recovery.
Each element circuit is to be independently operated through a definite
purpose
magnetic contactor having a resistive load rating equal to or exceeding
the ampere rating of that particular circuit and shall be protected
by individual power fuses rated approximately 125% of the ampacity
of the circuit. Multiple circuit elements shall be provided with
a
power distribution block for connecting of the incoming power feeds
(Optional Specifications: Built-in non-fused
On/Off disconnect switch, built- in circuit breaker with an On/Off
handle.) A safety
door interlock switch shall interrupt power to the control circuit
when the control panel door is opened. The control thermostat shall
be immersion type and shall be consistent with the recovery rate
of the heating element as to the number of steps required. A hi-limit
control with a manual reset button shall be factory installed to
disconnect
all ungrounded conductors to the heating element(s) in the event
of an over-temperature condition in the storage section.
• Option: ____________________________
• Option: ____________________________
• Option: ____________________________
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Duel Fuel Package
___________
Shall be required
___________
Shall not be required
The heating coil shall utilize (___________
Optional Specification: steam, boiler
water, HTHW ) and be rated to heat___________
GPH of water at a ___________
oF rise
( ___________
oF 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 150 psi working pressure. The single
wall (Optional Specification: Double wall ) coil
shall be constructed from 18 gauge 3/4" OD copper (Optional Specification: 90/10
Copper-nickel, stainless steel) tubes. The coil including the tube sheet,
baffles, and spacers
shall have all non-ferrous wetted parts and a fabricated steel head. The
water heater shall (shall not) be supplied with steam operating controls.
A self-contained
(Optional Specification: Pneumatic, pilot, electric ) 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 following steam options may be selected:
• Option: The water heater shall be equipped with a factory-packaged intra-tank
circulator to continuously circulate water within the tank to reduce stratification.
• 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.
• Option: Single solenoid safety system to close the control valve should
the water temperature in the tank reach the hi-limit set point. Requires 5
Amp, 120 Volt service.
• Option: Double solenoid safety system dumps over heated water in the
storage tank to drain in addition to closing the control valve. Requires 5
Amp, 120 Volt service.
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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 ( Optional Specification: full
ten (10) years Non Pro-Rated tank warrantly) from 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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