Marine Products Division
Model MSH & MH
Shipboard Electric
Water Heater
80-5000 Gallon Capacity
15-1600 KW — All Voltages & Phases
Reliable
Mounting Systems
■
■
Only high grade materials
Heavy-duty legs secure
used in construction to
the tank to deck
ensure long operating life
■
Side-sway bulkhead
■
■
Hydrastone cement
lining provides superior
protection and tank
longevity
Heavy duty construction
withstands demanding
marine use
attachment points provide
added mounting stability
The entire mounting
system is integrally welded
to tank for maximum
stability and safety
■
Packaged System
Fully packaged water
heater saves time and
Marine Approvals
■
■
United States Coast Guard
(USCG) conformance
money during installation
and American Bureau of
Shipping (ABS) approved
■
All electrical operating
controls are factory
■
USCG conformance and
ABS approval eliminates
costly delays and
uncertainties during ship
inspection
selected and wired to
ensure reliable operation
Full range of styles, sizes,
and optional features to
meet your exact water
heating needs
■
A Heavy Duty Storage Electric Water
Heater For Marine Use
The Hubbell Model MSH and MH water heater is specifically
designed for marine use on board a surface vessel or platform
and is in USCG conformance and is ABS approved. By utilizing
deck and bulkhead mounting supports, the water heater is
securely fastened to the ship structure, thus providing a secure
and reliable water heater installation. The heavy-duty carbon
steel storage tank is lined with specially formulated hydrastone
cement that provides superior protection, tank longevity and
withstands demanding marine use.
The MSH is a large volume
packaged water heater for
marine use.
When you specify and install a Hubbell model MSH or MH,
knowing that it is in conformance with USCG regulations and
is ABS approved, you will have confidence that the ship owner
will be provided with a quality product that is a long lasting and
trouble free source for hot water.
ISO
ISO 9001:2008
The Electric Heater Company
■
P.O. Box 288 Stratford, CT 06615-0288
■
Phone:(203)378-2659 FAX:(203)378-3593
■
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Model MSH & MH
Shipboard Electric
Water Heater
Mode MSH/MH
Standard Equipment
Model MSH/MH
Optional Equipment
Vessel Construction
Vessel
1. All welded carbon steel vessel designed and built in
strict accordance with the ASME Code Section IV and
stamped, certified, and registered with the National Board
of Boiler and Pressure Vessel Inspectors.
1A. Alternate protective lining:
Phenolic epoxy resin.
1B. Alternate vessel construction:
Stainless Steel (Please specify Type: 304, 316 or 316L)
90/10 Copper-Nickel, other.
5
2. All internal tank surfaces are lined with a minimum of /8"
thick Hydrastone cement for superior protection and tank
longevity.
1C. Alternate working pressure:
Please specify
3. Designed for 100psi working pressure and hydrostatically
1
tested at 150psi (1 /2 times the WP).
General
General
1. Heavy duty 2" thick fiberglass blanket insulation covers
the pressure vessel for maximum operating efficiency and
minimal standby heat loss.
2. Heavy gauge galvanized steel protective jacket holds
insulation in place and protected to ensure highly efficient
operation.
1. Skid mounting on heavy duty all welded I Beam
2. Type 304 stainless steel protective jacket,
please specify if painted.
3. Dual energy package provides operational flexibility
for electric and (steam or boiler water) power.
See page 8 for details.
3. Integrally welded bulkhead attachment points.
4. Entire vessel is supported on heavy duty integrally welded
steel supports for sturdy deck mounting.
5. Full five (5) year Non Pro-Rated tank warranty and one (1)
year electrical component warranty.
6. Bronze ASME/CSA rated combination temperature and
pressure safety relief valve set at the vessel working
pressure and 210ºF.
7. ABS approved and in conformance with USCG
regulations.
Electrical Operating Controls
Electrical
1. All electrical operating controls are factory sized,
selected, wired, tested, and mounted in a NEMA 1
enclosure to ensure safe and reliable operation.
1. NEMA 4 watertight enclosure for outdoor/wet locations.
2. Explosion resistant enclosure for hazardous locations.
Please specify class, division, and group.
2. A power distribution block is supplied for single point
3. Built-in circuit breaker (with or without shunt trip) or a
electrical installation.
built-in non-fused On/Off disconnect switch.
3. Power fuses rated at a maximum of 60 Amps protect
each heating element branch circuit per NEC and UL
requirements. Each branch circuit has a maximum rating
of 48 Amps.
4. Heavy duty definite purpose magnetic contactor with
integrally mounted power fuse block assembly switches
power on/off to each branch circuit.
4. Alternate element sheath material (Please specify:
Incoloy, Stainless Steel, other).
5. Specialized heating element construction including:
Special watt density rating, passivation, electropolishing,
hermetic seals or any other feature required to meet the
needs of your application.
6. Factory installed low water cut out device to disengage
electrically the heating element(s) in the event of
insufficient water in the tank.
5. Heavy duty removable flange type immersion heating
element provides long service life.
6. Fully adjustable thermostat maintains accurate water
temperature and is sized by the factory to control the
appropriate number of heating element circuits.
7. Dial thermometer and pressure gauge factory installed in
the tank.
7. A generously sized transformer provides fused 120V to
8. Intra-tank circulation pump package with On/Off switch to
continuously circulate water within the tank and thereby
reduce stratification. All bronze circulator pump is rated
1/12 HP, 120V, 1 Ph.
the control circuit
8. A fully adjustable (100-240 ºF) safety hi-limit device with
manual reset interrupts power to the control circuit in the
event of over-temperature water in the storage tank.
9. Status indicating lamp(s).
10. Audible alarm system.
11. Digital display electronic temperature controller. Please
specify with or without RS485 communication port for
remote operation of the temperature controller.
9. Safety door interlock mechanism interrupts power to the
control circuit upon opening the electrical control panel.
10. Louvers in the control panel allow for cooling of the
electrical components to ensure maximum electrical
component longevity (when required).
12. Additional ground connections
3
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Marine Products Division
Protective Jacket
6"
6"
Outline Dimensions
Model MSH (vertical)
Tank
Hot Water Outlet
T&P Relief Valve
45o
Mounting Hole
4 Places Equally
Spaced 90° Apart.
Tanks 26" diameter
and smaller 4" x 4" x
1/4" Base Pads with 5/8"
mounting hole
Lifting
Lug
Tanks 30" - 42" dia.
5” x 5” x 1/4" Base Pads
with 9/16" mounting hole.
3 1/4"
Base View
Top View
Tanks 48" diameter
and larger 6" x 6" x 1/4"
Base Pads with 9/16"
mounting hole.
Hot Water LiftingT&P Relief
Outlet
Lug
Valve
4"
Protective Jacket
Pressure Vessel
F
B
7/8"
Bulkhead
Insulation
Mounting Holes
2 Places
1 1/2"
10"
Tank Cross
Section
Electric Control Panel
5/8"
Steel
Pressure
Vessel
Cement
Lining
12" x 16" Manway
Electric Heating
Element
Withdrawal
Space
6"
Combination Cold
A
Water Inlet And Drain
Side View
Front View
Model MH (horizontal)
10"
C
Lifting
Lugs
T&P Relief
Valve
Hot Water
Outlet
4"
Pressure
Vessel
Insulation
Protective
Jacket
12" x 16"
Manyway
Electric Control
Panel
E
Withdrawal
Space
Electric Heating
Element
Cold
Water
Inlet
Drain
Supports (Specify
Saddles Or Skids)
D
Side View
(Note: optional skid base shown here)
Front View
4
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Model MSH & MH
Shipboard Electric
Water Heater
Dimensional Data, Models MSH & MH
Overall Dimensions (Inches)
Storage
Tank
Inlet
Approx.
Shipping
Weight
(Lbs.)
Vertical
Storage
Outlet
Sizing
(NPT)
Capacity
(Gallons)
Bulkhead
Mounting
Bolt
Diameter
x Length
Diameter
A
Height
B
Length
C
Width
D
Height
E
Circle
F
G
80
120
28
28
30
34
34
34
40
40
40
40
40
46
46
46
46
52
52
52
52
52
52
52
52
52
52
58
58
64
64
76
76
88
88
N/A
N/A
55
75
49
68
28
28
30
34
34
34
40
40
40
40
40
46
46
46
46
52
52
52
52
52
52
52
52
52
52
58
58
64
64
76
76
88
88
94
94
34
34
36
40
40
40
46
46
46
46
46
52
52
52
52
58
58
58
58
58
58
58
58
58
58
64
64
70
70
82
82
94
94
100
100
15
15
20
20
20
20
20
20
20
20
20
22
22
22
22
24
24
24
24
24
24
24
24
24
24
26
26
28
28
32
32
36
36
40
40
18
18
24
24
24
24
30
30
30
30
30
36
36
36
36
42
42
42
42
42
42
42
42
42
42
48
48
54
54
60
60
72
72
84
84
24 x 45
24 x 64
26 x 68
30 x 63
30 x 72
30 x 79
36 x 64
36 x 70
36 x 78
36 x 82
36 x 84
42 x 71
42 x 75
42 x 78
42 x 83
48 x 69
48 x 72
48 x 75
48 x 79
48 x 83
48 x 85
48 x 97
48 x 109
48 x 122
48 x 135
54 x 139
54 x 164
60 x 158
60 x 175
72 x 159
72 x 187
84 x 164
84 x 185
90 x 174
90 x 196
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
2
1000
1150
1300
1500
1700
1750
1850
2000
2180
2300
2500
2600
2700
2900
3000
3100
3225
3350
3400
3500
3650
4000
4300
4800
5200
5600
6000
7400
8100
8200
8300
8900
9800
10700
11600
150
79
72
175
73
67
200
225
82
76
89
83
250
74
68
275
80
74
300
325
88
82
92
86
350
375
94
88
81
75
400
425
85
79
88
82
450
475
93
87
79
73
500
525
82
76
2
85
79
2
550
575
89
83
2
93
87
2
600
700
95
89
2
107
119
132
145
149
174
168
185
169
197
174
195
N/A
N/A
101
113
126
139
143
168
162
179
163
191
168
189
178
200
2
800
900
1000
1250
1500
1750
2000
2500
3000
3500
4000
4500
5000
2
2
2
2
2
3
3
3
3
6 FLG.
6 FLG.
6 FLG.
6 FLG.
Note: All dimensions are approximate and subject to change. Please reference the submittal drawing for actual dimensions. The
tank selections above are shown for convenience. A full selection of storage capacities is available by entering the desired capacity
into the model number.
* 80, 120 and 150 gallon tanks do not come equipped with a manway. Please consult factory if desired on these sizes.
5
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Marine Products Division
Recovery Ratings And Amperage At Selected KW
Gallons Per Hour (GPH) Heated At
Amperage Rating At Various Voltages
KW
BTU/HR
RATING
Various Temperature Rises
INPUT
208V 3F
42
240V 3F
36
380V 3F
23
440V 3F
21
480V 3F
18
60 °F Δ
103
80 °F Δ
77
100 °F Δ
62
120 °F Δ
51
140 °F Δ
44
15
20
51,195
68,260
137
103
82
68
59
56
48
30
28
24
25
85,325
171
128
103
85
73
69
60
38
35
30
30
102,390
119,455
136,520
153,585
170,650
187,715
205
154
123
103
88
83
72
46
42
36
35
239
179
144
120
103
117
97
84
53
49
42
40
273
205
164
137
111
96
61
56
48
45
308
231
185
154
132
146
161
125
139
153
167
181
195
208
222
236
250
264
278
306
333
347
417
108
120
132
145
157
169
181
193
205
217
229
241
265
289
301
361
421
482
542
602
662
723
783
843
903
963
1084
1204
2408
2890
3372
3854
68
63
54
50
342
256
205
171
76
70
60
55
376
282
226
188
84
77
66
60
204,780
221,845
238,910
255,975
273,040
290,105
307,170
410
308
246
205
222
239
256
273
176
91
84
72
65
444
333
267
190
205
220
234
249
264
278
293
322
351
366
439
513
99
91
78
70
478
359
287
106
114
122
129
137
145
152
167
183
190
228
266
304
342
380
418
456
494
532
570
608
685
761
1521
1825
2130
2434
97
84
75
513
384
308
328
104
111
118
125
132
139
153
167
174
209
244
279
313
348
383
418
453
487
522
557
627
696
1393
1671
1950
2229
90
80
547
410
96
85
581
436
349
290
308
325
342
376
102
108
114
120
132
145
151
181
211
241
271
301
331
361
391
421
452
482
542
602
1204
1445
1686
1927
90
615
461
369
95
324,235
341,300
375,430
409,560
426,625
511,950
597,275
682,600
767,925
853,250
938,575
1,023,900
1,109,225
1,194,550
1,279,875
1,365,200
1,535,850
1,706,500
3,412,000
4,094,400
4,776,800
5,459,200
649
487
390
410
100
110
120
125
150
175
200
225
250
275
300
325
350
375
400
450
500
1000
1200
1400
1600
683
513
752
564
451
820
615
492
410
854
641
513
427
513
1025
1196
1367
1538
1708
1879
2050
2221
2392
2563
2733
3075
3417
6833
8200
9567
10933
769
615
897
718
598
683
769
854
940
1025
1110
1196
1281
1367
1538
1708
3417
4100
4783
5467
486
556
625
695
764
834
903
973
1042
1112
1251
1390
2779
3335
3891
4446
1025
1153
1281
1409
1538
1666
1794
1922
2050
2306
2563
5125
6150
7175
8200
820
586
659
732
805
879
952
1025
1098
1171
1318
1464
2929
3514
4100
4686
923
1025
1128
1230
1333
1435
1538
1640
1845
2050
4100
4920
5740
6560
Notes: The KW selections above are shown for convenience. A full selection of KW ratings from 1 to 1600 KW is available by entering the
desired KW into the model number. For alternate voltages including 415, 575 and 600 volt, please consult factory.
Electrical
Note: Each branch
KW x 1000
Volts
Example: 150 KW at 480V 3F
circuit is rated at
a maximum of 48
Amps and each
circuit is typically
operated as an
independent
÷ 1.73 = Amps 3Φ
150 x 1000
÷ 1.73 = 180 Total Amp Draw
KW x 1000
Volts
480
= Amps 1Φ
temperature step.
180 ÷ 48 Amps max circuit rating = 3.75
Round up the number of circuits to 4
6
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Model MSH & MH
Shipboard Electric
Water Heater
Model MSH & MH Sizing Information
Step 1: Solve for the unknown using the formulas stated below
Variables To Solve For:
KW Requirement:
Temperature Rise:
Flow Rate:
GPH x
°F ∆T x 0.00244 =
KW
KW x 410 ÷
GPH =
°F ∆T
KW x 410 ÷
°F ∆T=
GPH
Metric Conversions
Liters x 0.2641 = Gallons
Gallons x 3.79 = Liters
Gallons x 0.003785 = m3
m3 x 264.2 = Gallons
1OC ∆T = 1.8°F ∆T
OF = (OC x 1.8) + 32
OC = (OF - 32) x 0.556
psi x 6.86 = kPa
Watts/Sq.Cm. x 6.4 =
Watts/Sq.In.
kPa x 0.1456 = psi
Kg/cm2 x 14.28 = psi
psi x 0.07 = Kg/cm2
Lbs x 0.4536 = Kg
Kg x 2.2 = Lbs
Watts/Sq.In. x 0.155 =
Watts/Sq.Cm.
psi x 0.06896 = Bar
Bar x 14.5 = psi
Model Number Designation
—
—
0
■
■
■
■
■
Step 1
Step 2
Step 3
Step 4
Step 5
Model:
Gallon Capacity:
Electric KW:
Vessel Type:
Voltage / Phase / Hz:
80-5000 U.S. Gallons
5-1600KW
MSH = Vertical
MH = Horizontal
SL = Hydrastone
Cement lined tank
RS = 208-1-60
R
S
T
= 208-3-60
= 240-1-60
= 240-3-60
= 277-1-60
GL = Phenolic Lined
Steel
CN = Solid 90/10
Copper-Nickel
W
T3 = 380-3-50/60
T7 = 415-3-50/60
T5 = 440-3-60
T4 = 480-3-60
T4S = 480-1-60
T6 = 600-3-60
SS = Solid Stainless
Steel (Specify Type
304 or 316L)
Example:
MSH250-0-80SLT5
A Hubbell marine water heater with a storage capacity of 250
gallons and an 80 KW electric heating element. The tank is
cement lined. Power required is 440 VAC, 3 phase, 60 Hz.
Option Note
Any and all optional equipment for a water heater must be called
out in the written specifications. A model number in and of itself
does not reflect any optional equipment selected.
(Manufacturer reserves the right to change specifications without notice.)
7
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Marine Products Division
Optional Steam Package
Benefit Of Dual Fuel Capability
The Hubbell model MSH and MH water heater is available
with a factory installed heat exchanger to provide heating
capability utilizing ships steam or boiler water. While the
ship is under way and the boilers are producing steam,
the water heater will operate in “primary” mode and use
steam to heat the water. When the ship is dockside, and
steam generation is reduced (or completely shut down), the
operator can switch the water heater over to electric heating
mode by simply turning a switch on the Hubbell control panel
which activates the factory packaged and installed electric
immersion heaters. This dual fuel capability provides ship
operators with complete flexibility in determining which fuel
mode is most advantageous to operate at any given time.
Electric
Control Panel
Electric
Heater
Steam Heating
Coil (steam
controls not
shown)
Standard Features
Optional Features
Steam Heating Coil
Optional vessel construction and optional general
construction features as shown on page 3.
1. A high quality factory installed 2 pass U-Tube heating
coil constructed from 18 BWG 3/4" O.D. single wall
copper tubing designed for a maximum working
pressure of 150 psi.
Steam Heating Coil
1. Double wall tubing with a leak detection port
2. All wetted parts including the tube sheet and baffles
2. Alternate tubing material please specify:
are non-ferrous for maximum longevity.
(Stainless Steel, 90/10 Copper-Nickel, Other)
3. Heavy duty fabricated steel head with threaded NPT
3. Fabricated steam head constructed from:
steam and condensate connections.
(Stainless Steel, Copper Alloy, Other)
Steam Operating Controls
Operating Controls
1. Steam operating controls are factory selected, sized,
4. Steam controls are factory selected and sized, but
piped, and tested to ensure reliable operation.
shipped loose for in the field installation by others.
2. All steam components are factory plumbed with
schedule 40 black iron pipe and ready for steam and
condensate connections.
3. High quality cast iron pilot operated steam control
valve modulates the flow of steam through the
heating coil to provide accurate water temperature
control.
4. Cast iron Y strainer with 20 Mesh screen protects the
steam controls and coil from dirt and debris in the
steam supply.
5. Various steam control valves are available to meet
the specific needs of your application, please
specify: Self-operated type, pneumatic operated,
electric motor operated, separate pressure
reducing pilot type.
6. Single solenoid safety system closes the control
valve should the water temperature in the tank
reach the hi-limit set point. Requires 120 volt 5
amp electrical service.
7. A double solenoid safety system dumps over
heated water in the storage tank to drain in
addition to closing the control valve. Requires 120
volt 5 amp electrical service.
5. Thermostatic drip trap removes condensate from the
steam supply line.
6. Heavy duty cast iron float and thermostatic main
condensate trap for optimum efficiency.
8. Dial water thermometer and pressure gauge
factory installed in the tank.
7. Brass vacuum breaker and dial steam pressure
gauge installed in the heating coil head.
9. Factory wrapped and baffled steam coil with
integral pump package.
Note: Additional steam and boiler water design literature
is available in Hubbell brochures titled “ST”,“BW” and
“Heating Coils”.
10. Steam Controls to be cast steel construction.
8
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Model MSH & MH
Shipboard Electric
Water Heater
Optional Steam Package
Steam Component General Configuration
The steam control valve maintains accurate water
temperature in a steam fired water heater by regulating
the flow of steam through the heating coil.
To sensing bulb
in tank
Adjustable
Temperature Pilot
Steam Inlet
Y Strainer
Pneumatic or electronic
controller (if required)
Steam Pressure Gauge
Steam
Control
Valve
Vacuum Breaker
Steam Coil
Thermostatic
Drip Trap
Y Strainer
Condensate Outlet
F & T Main
Condensate Trap
There are four types of steam control valves available for
use on a steam fired storage water heater.
Self Operating
Pilot Operated
A pilot operated control valve is the most widely used
type of valve for standard water heating applications.
In this type of valve, a temperature pilot device utilizes
steam to operate the main valve. No external power
source is required other than steam. This is a highly
dependable temperature control system which is suitable
for most applications. As an option, this valve may
include a pressure reducing pilot which limits the steam
pressure to a predetermined maximum.
The valve design includes a bulb and capillary assembly
charged with a thermally responsive vapor. The
expansion/contraction of the vapor acts upon the valve
bellows in order to control the flow of steam through
the valve. No external power source is required for
operation.
Pneumatically Operated
In this configuration the ships air supply feeds a factory
installed temperature controller which operates the
steam control valve. The temperature controller sends
a precise air signal to the steam control valve which
adjusts the flow of steam into the heating coil. The
temperature controller is fully adjustable from 50-250°F
and requires 20psi air at a maximum consumption of 0.5
SCFM.
Electronic Operated
This control valve is similar to a pneumatically operated
system, except in this case the temperature controller is
a sophisticated digital display electronic device which
outputs a 4-20ma signal to a compact motor mounted
on the steam control valve in order to proportionally
control the flow of steam to the heating coil. The
temperature controller displays set point as well as
actual water temperature and is available with an RS485
communications port for remote control.
9
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Marine Products Division
Optional Steam Package
Heating Coil General Configuration
Length B
Inlet
Tube Support
Tubes
Outlet
Tank
Head
Tube
Flange
Sheet
Rib Gasket Ring Gasket Tank
Tank Lining
Please Complete The Following Information:
Tube Outside
Diameter
Tube Sheet Data
Outside Diameter
Thickness
4
1
Material
Gauge
BWG
Material
Type
Single Wall
Double Wall
Number of Tube holes
in the tube sheet
Design Pressure
Design Temperature
Does the tube sheet have
Bolt Holes in it?
Number of passes
5
Yes
No
If Yes:
■ # of bolt holes
■ Dia. of bolt holes
■ Bolt circle
Number of tube
6
supports
Full
Half type
Distance to each
tube support
Do the bolt holes straddle
the centerline?
Material
Yes
No
O.D. of supports
Thickness
Diameter of the neck nozzle on the tank.
Outside Diameter
2
Recovery rated
7
to heat
GPH
oF
Inside Diameter
from
oF to
(Include thickness of neck lining, if any)
When supplied with the following
heat source:
Circumference Of Neck
Steam at
psig
Lbs./Hour
Steam Consumption
Immersion length
3
of tubes “B”
Boiler Water at
from
GPM
Heating surface area
oF to
GPM
oF to
oF
oF
in Sq. Ft. (if known)
Tank Type:
Vertical
Horizontal
HTHW at
from
Tank dimensions: Diameter
Height
Pressure Drop
8
Steam
psi
Pull space
maximum length
Boiler or HTHW
psi
10
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Model MSH & MH
Shipboard Electric
Water Heater
Optional Steam Package
Steam Consumption Formula
GPH x
°F ∆T x 8.33
=
Lbs / Hr Steam
Latent Heat of Steam
Steam Pressure (psi)
Latent Heat
0
2
5
10
15
20
25
30
40
50
970 966 960 953 946 939 933 929 920 912
Dual Fuel Model Number Designation
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Step 1
Step 2
Step 3
Step 4
Step 5
Step 6
Model:
Gallon Capacity:
Primary
Heating:
Secondary
Electric
Heating:
5-1600KW
Tank:
Voltage / Phase / Hz:
80-5000 U.S. Gallons
MSH = Vertical
MH = Horizontal
SL = Hydrastone
Cement lined tank
RS = 208-1-60
ST = Steam
R
S
T
= 208-3-60
= 240-1-60
= 240-3-60
= 277-1-60
BW = Boiler
GL = Phenolic
Lined Steel
Water
O = No steam
CN = Solid 90/10
Copper-Nickel
W
T3 = 380-3-50/60
T7 = 415-3-50/60
T5 = 440-3-60
T4 = 480-3-60
T4S = 480-1-60
T6 = 600-3-60
SS = Solid
Stainless Steel
(specify Type 304,
316 or 316L)
Example:
MSH400-ST-120SLT5
A Hubbell vertically installed 400 gallon dual fuel marine water heater with
a factory installed steam heating coil as the primary heating source and
a 120 KW electric heating element to operate as the secondary heating
source. Tank is cement lined. Power required is 440 VAC, 3 phase, 60 Hz.
Please note that steam heating capacity and construction features are not
identified in the model number and therefore must be noted in the written
specifications.
Option Note
Any and all optional equipment for a water heater must be
called out in the written specifications. A model number
in and of itself does not reflect any optional equipment
selected.
(Manufacturer reserves the right to change specifications without notice.)
11
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Model MSH & MH
Master Specification
ENGINEER / NAVAL ARCHITECT
SHIP NAME
SHIPYARD
CONTRACTOR
General
Provide a quantity of
Dual Fuel Package
packaged type Marine Electric
water heater(s) Model No.
as
Shall be required
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.
Shall not be required
The heating coil shall utilize ( Optional Specification: steam,
boiler water, HTHW ) and be rated to heat
GPH of
°F)
water at a
°F rise (
°F to
when supplied with
consume
psi steam to the control valve and
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 /4" OD
3
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
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
vessel shall be carbon steel and lined with seamless Hydrastone
gallons of storage. The storage
5
cement applied to a minimum thickness of /8" on 100% of all
interior tank surfaces, ( Optional Specifications: Phenolic lined
(
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.
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.
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.
Electric Recovery
The recovery section shall be rated at
heat GPH of water at
KW which will
°F rise (
°F to
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.
°F).
Electric Controls
The heater shall be designed to operate at
volts,
phase,
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
HZ with a fused low voltage
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.
Warranty
(
Optional Specifications: Built-in non-fused On/Off disconnect
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.
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
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.
Marine Products Division
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The Electric Heater Company P.O. Box 288 Stratford, CT 06615-0288
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