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Marine Products Division
Model MTX
Tankless On Demand
Electric Water Heater
Available Up To 54 KW in Single or
Three Phase Voltages
The Hubbell Model MTX Tankless Water
Heater is the perfect choice for Marine
applications.
SAVES WEIGHT
✓
SAVES SPACE
✓
SAVES TIME
✓
Marine Approvals
■ American Bureau of
Shipping (ABS) Type
Approved
■ ABS Approval eliminates
costly delays and
uncertainties during ship
inspection
Heavy Duty Construction
■
Simple to specify
and easy to operate
■ Factory wired electrical
controls provide troublefree installation and
operation
Weight and Space Saving
■
Signicantly reduces weight
and saves space compared to
storage tank water heaters
■
On demand heating
eliminates costly and
cumbersome storage tanks
■
Instantaneous design reduces
stand-by heat loss and lowers
operating costs
Reliable
■
Engineered for your
specic application
to ensure reliable operation
■ Constructed with high grade
materials to ensure long
operating life
Tankless On Demand Water Heater for
Marine Applications
The Hubbell MTX Tankless model is a highly reliable and easily
maintained electric water heater designed for operation in a
marine application. The Hubbell MTX Tankless is compact,
highly efcient, takes up minimal space, and reduces operating
costs. Hubbell’s vast experience, meticulous engineering, and
advanced manufacturing processes ensure that you can rely on
the MTX Tankless for your water heating needs in even the most
demanding and critical applications. It makes sense to specify
and install a Hubbell MTX Tankless model for your heating
requirements, and as the owner you will be provided with a
quality product that is long lasting, trouble-free, and energy
efcient.
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High Efciency Compact
Electric Tankless
Water Heater
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ANSI/NSF 5
ISO 9001:2008
The Electric Heater Company
P.O. Box 288 ■ Stratford, CT 06615-0288
Phone: 203- 378-2659
info@hubbellheaters.com
■
FAX: 203- 378-3593
■
www.hubbellheaters.com
ISO
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Marine Products Division
Hubbell Tankless Features
How It Works
The Hubbell Model MTX electric tankless water heater contains high powered heating elements that
heat water only when there is demand for hot water. When hot water is needed, a built in ow sensor
measures the exact ow rate, and that data combined with temperature readings at the heater’s inlet
and outlet are processed by the electronic temperature controller. This data is continuously transmitted
to the temperature controller, which constantly calculates the precise amount of power (kW) needed to
achieve the desired temperature. A zero cross over ring signal is sent to the fast acting triacs in order to
modulate the heating elements to the precise level needed to meet demand. The Hubbell tankless heater
uses only as much power as is needed, while delivering accurate and consistent hot water temperature.
Heater Overview - 3 Element Model Shown
Stainless Steel Exterior
Heating Chamber
All copper and bronze
construction
Outlet Thermistor
Provides feedback to ensure
consistent outlet temperature
HOT WATER OUT
Drain Port
Simplies maintenance
COLD WATER IN
Dielectric Unions
Simplies plumbing installation
Flow Meter
Measures the exact ow rate which
enables the control system to provide
perfectly matched heating power with demand
Power Distribution Block
Provides a heavy duty single point
power connection
(Only Required on Certain Models)
Fully disengages the heating
elements in a fault condition
Sleek design and corrosion resistant
Magnetic Contactor
(Only Required on 3 Phase Units)
for long life
Control Transformer
Step down transformer provides
240 Volt control circuit power
(Only Required on Models over 240 Volt)
Commercial Quality
Heating Elements
Incoloy sheathed for long life
Safety Thermostats
Auto resetting Hi-Limit thermostats
protect against over heating
Solid State Switches
Modulate heating elements 0-100%
to ensure accurate and consistent
temperature and long element life
Inlet Thermistor
Senses cold water temperature
Numeric Digital Display
Electronic Temperature Controller
is adjustable in 1° increments in either
°F or °C
Bulkhead Mounting
Securely mounts to the bulkhead and
saves valuable deck space
Tankless Model MTX Standard Specications
Heating Chamber:
Capacities:
Mounting:
Voltages:
Phase:
Power Factor:
Thermal Efciency:
Copper and Bronze
5 thru 54 kW
Bulkhead Mounted
208 thru 600 Volt 50/60 Hz
Φ
and
3
(balanced)
Φ
1
0.999
98% +
Inlet/Outlet Size:
MTX:
MHX:
3
/4" Dielectric Union Copper Sweat
1" Dielectric Union Copper Sweat
Min/Max Flow:
MTX:
MHX:
2
Thermostat Range:
0.2 GPM Min, 8.0 GPM Max
0.5 GPM Min, 40 GPM Max
32 -194°F / 0-90°C
Hi-Limit:
Design WP:
Design TP:
Elements:
Standby Power:
Chamber
Electrical
Warranty:
Enclosure:
Approvals:
200°F (Fixed)
100 psi
300 psi
Incoloy 800
< 3 Watts
5 Year
1 Year
Stainless Steel Brushed Finish
ABS, cULus, UL EPH ANSI/NSF 5