Hubbell MSH - Manual (Page 12)

Model MSH & MH
Master Specification
The Electric Heater Company
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P.O. Box 288
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Stratford, CT 06615-0288
Phone: (203) 378-2659
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FAX: (203) 378-3593
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E-mail: [email protected]
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www.hubbellheaters.com
Marine Products Division
SHIP NAME
SHIPYARD
ENGINEER / NAVAL ARCHITECT
CONTRACTOR
Committed to continuous improvements
Continuing research results in product improvement; therefore these
specifications are subject to change without notice. For the most updated
information, consult the factory.
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, 316 or 316L
Stainless Steel Tank. ) The pressure vessel is to be 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 °F.
Electric Recovery
The recovery section shall be rated at KW which will
heat GPH of water at °F rise ( °F to
°F).
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, 316 or 321 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
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 warranty ) 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.
Dual 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 °F rise ( °F to °F)
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 BWG 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.