Page 1
Electric Ta n k l e s s Water Heat e rs
Most Advanced Line of Residential & Commercial Instant Heaters
Endless Hot Water
Endless
Series
Savings
Page 2
Heating
Cooling
Water Heating
Appliances
(includes refrigerator, dishwasher,
clothes washer and dryer)
Lighting
Electronics
(includes computer and monitor
and TV and DVD player)
Other*
(includes external power adapters,
telephony, set-top boxes, ceiling fans,
vent fans and home audio)
The US Department of Energy says that residential tank storage heaters are the highest energy
consuming home appliances only second to heating and air conditioning systems. It is consuming
more energy than your refrigerator, dish washer, washer and dryer combined. If you have a
traditional tank style water heater in your garage, attic, or basement and older than 9 years NOW is
the time to upgrade.
Tank-less Water Heating is the futurist solution — now Maxwell electric tank-less water heaters
available in 99% efficiency to save you up to 50% in energy consumption, enjoy endless hot water
without any recovery time, and significant space savings.
MODEL NUMBER
NOMENCLATURE
This Klimaire nomenclature supercedes
all previously issued (05/23/2013)
M
S
1 2
0
C
2
S T
U
Test Calification
U : UL/ETL
C : CSA
O : NLA
Casing Type & Color
B: Injection Molding – Black
S: Injection Molding – Silver
W:Injection Molding – White
M:Metal Casing – Silver
Minor Design Change
P : Plate Heater Exchanger
T : Tubular Stainless
Steel Heat Exchanger
Power Supply Code (V/ph)
1 – 120 / 1
2 – 240 / 1
5 – 240 / 3
Temperature Control
C : Automatic Constant
P : Power Level
Capacity (kW)
120 – 12.0
150 – 15.0
180 – 18.0
210 – 21.0
240 – 24.4
270 – 21.0
Heater Type
S : Tankless
H : Holding Tank
Brand:
M: Maxwell
Page 3
Tankless Water Heaters ApplicationsTankless Water Heaters Applications
Residential Electric Water Heating
Maxwell AquaFinity Series tankless water
heaters are perfect for single family homes,
townhouses, condos, manufactured housing,
apartments, cottages, cabins.
Applications include new installations, retrofits
replacements and in conjunction with your new or
existing heating appliance.
Commercial and Multi-Dwelling Electric
Water Heating
Applications for commercial properties including
hotels/motels, resorts, multi-family houses, businesses,
shopping centers, laboratories, hair salons, laundromats,
stadiums, restaurants, theme parks, medical facilities, car
washers.
Our compact units utilize a fraction of wall space and
zero floor space without any venting requirements
providing you the best solution for any application.
Supplemental/Auxiliary Electric Water Heating
Application as a booster for solar water heaters and
geothermal water heaters.
Maxwell electric water heater can work as a booster or an
auxiliary heating appliance and raise the temperature when
your system needs – perfect back up heater.
Point of Use
Applications are numerous – it is recommended in every wet zone
utilizing hot water to use tankless water heaters to receive warm
water immediately and avoid waiting long time while wasting water
unnecessarily.
Radiant Floor Heating
Maxwell water heaters are ideal to
provide heated water for a closed
loop system for uniform space
heating.
Recreational
Boat kitchens and bathrooms – RV kitchens and bathrooms
Page 4
AdvantagesAdvantagesAdvantages
Endless hot water supply on demand.
Saves up to 50% on water heating costs.
Space saving compact design.
99% plus energy efficientcy
No minimal stand by energy losses.
Sleek, lightweight & modern
design fits most applications.
Instant hot water at point of use
applications reducing waiting
time and water consumption.
Double the life expectancy
over conventional water heaters.
No hot water storage, thus reducing
mineral deposits and lime scaling to
prevent efficiency reduction over time.
Easy installation with provided accessories.
Environmentally friendly no venting required.
Compact design
(15 3/4 H x 10 1/4 W x 3 5/8 D)
wall mounting saves valuable floor space.
No corrosion
No enefficient mixing cold water
Series
Point of use
10"
15.2"
Recommended Optional AccessoriesRecommended Optional Accessories
Ball valve:
It is required to
isolate the heater
without affecting the water flow
to the rest of the house, and for
maintenance. The valve can also
be used to regulate the GPM
without restrictions.
Hex nipple:
to make easier
the connection
of the heater and
the water piping
WarrantyWarrantyWarranty
YEAR
ALL PARTS
1
1
GUARANTEE
3
3
Flexible tubes:
Ideal to readily connect
the heater to the water
inlet and to the point
of use.
YEAR
HEATING CHAMBER
GUARANTEE
Dimensions
Water filter:
Filters water at
the supply to help
reduce sediment,
sand and rust
to extend the life and performance of
the water heater, avoiding calcification
of the heating element, and the
internal water channel.
3
3
3.7"
YEAR
OPTIONAL REPLACEMENT
GUARANTEE
One year all parts
Three years
heating chamber
Three years optional
replacement warranty
Page 5
FeaturesFeatures
58
Models available in multiple colors
to match your interior design.
Black Silver Silver
IMD Injection Molding Models
12 kW - 24 kW
Case-unique glossy IMD front cover,
splash-proof, corrosion and age resistant
Attractive Metal Casing
15 kW - 27 kW
Patented heating technology – enclosed loop heating system for instant
hot water with less heating loss, nano insulation material totally separates
water from electricity
Reliability – Single piece cast aluminum with a stainless steel flow channel
that eliminates water and electric leakages in the heating chamber, therefore
the heating element will have an extended service life unaffected by the quality
of the water thus avoiding lime scaling.
Multi-protection devices – anti-scalding, over-pressure, over-temperature,
and electricity isolation
Digital temperature control - Direct temperature setting, from 86º F -127º F,
allows you to get constant hot water at the precise temperature for maximum
comfort and suitable for different applications; memory function avoids
repeating settings.
Convenience - LED wide screen touch button displays the working
conditions, outlet temperature, working time, and power consumption.
Advanced micro-processor control - Self-diagnostic function automatically
monitors and displays working conditions, providing constant temperature
water flow by engaging heating elements in stages
Soft Start. – Power is regulated to avoid excessive startup surge.
Page 6
Top Reasons to Select Maxwell Tankless Water Heaters (TWH)
Unlike traditional tank water heaters wasting energy and heating water all day long with limited hot water
supply capability, lengthy recovery time with decaying efficiency and capacity over time, MAXWELL tankless
heaters offer you endless hot water supply consistent over life, comfortable water temperature, saving up to
50% in energy consumption, maintaining 99% efficiency throughout its service life with minimal standby loss.
By providing warm water immediately where it's used, tankless water heaters waste less water. Maxwell
tankless water heaters use the most advanced technology to produce the most eco-friendly water heating
appliance available in the market. Using Maxwell AquaFinity heaters you contribute to reduce the
environmental impact while conserving water and saving money. Maxwell AquaFinity Series electric water
heaters use state-of-the-art patented technology with several different layers of insulating ceramic avoiding
direct contact of water with heating elements to prevent corrosion and scaling.
11
23”
Space Saving Technology
16
51"
Traditional tank water heaters can take 16 sq. ft of valuable floor space. However, AquaFinity
Series are smaller than attaché case — sleek, lightweight and attractive, design allows you for
unconcealed installation applications with any decoration virtually on any wall inside your
house. Our compact design gives you limitless installation options. By strategically locating the
Aquafinity Series maximum performance, energy efficiency, and reduced water consumption
will be achieved for point of use application or whole house water heating.
Never-ending Hot Water On-Demand
Maxwell AquaFinity Series tankless water heaters supply hot water when needed. Since
there is not storage tank you enjoy hot water as long as needed. Even during the peak use
you don't have to concern running out of hot water or to wait for the tank to recover.
Average Annual Operating Costs Comparison
ElectricNatural Gas PropaneOil
Electric
Water
Heater
$775
$578
$320
E N ERG Y FA C TO R
0.99 0.575 0.9 0.55 0.575
F U EL CO S T
11.7 ¢ $1,63 11.7 ¢ $2,97 $2,59
Y E ARL Y C ON SUM P TI O N
2739 kW-h 269 Therm 5015 kWh 203 Gal 269 Therm
AV ERG A GE S E RV I CE L IFE
20 yrs. 10 yrs. 14 yrs. 9 yrs. 10 yrs.
$438
$603
Proven Energy Savings
Traditional tanks as well as conventional tankless water
heaters use immersed coils in the water directly heating it.
This kind of design causes heat spots and over time lime
scaling and mineral deposits that decrease the heating
capacity that lowers the efficiency of the heater. The newly
designed Maxwell unit heats water instantly as it flows thru
the heating channel. The flow rate and temperature of the
incoming water are monitored by the electronic control that
activates the number of heating elements
required to reach the set temperature,
and keep it constant for maximum
comfort.
Proven and Reliable Technology
Traditional tank and conventional tank-less water heaters heat the water directly using immersed coils. This type of design causes
heat spots, lime scaling, and mineral deposit build up that affect the heating capacity, and reduce the efficiency. Since there is not
water storage and traditional coil heating element in the Maxwell heaters their efficiency improves and the product life is doubled.
The Maxwell heaters are built with a stainless steel water flow channel inside single piece aluminum cast that further increase their
service life. Precise digital control provides an endless hot water supply at constant temperature.
Page 7
SpecificationsSpecifications
Injected Mold Model
Model
Phase
Voltage V
Wattage kW
Max. Amp. Load @ 240V A
No. of circuits n
Min. required double pole
circuit breaker
Min. wire size AWG cooper
Min. water flow to activate
Working pressure PSI/bar
Temperature range - ºF
Weight
Product Dimensions mm
Water connections NPT
Stainless Steel Model
Phase
Voltage V
Wattage kW
Max. amp. load A
No. of circuits
Min. required circuit breaker
GPM / L/min.
A
Model MS150C2TMU MS180C2TMU MS210C2TMU MS240C2TMU MS270C2TMU
kg
@ 240V
Min. wire size AWG cooper
Min. water flow to activate
Temperature range - ºF
Working pressure PSI/bar
Weight lb
Product Dimensions in
Water connections NPT
Check your local electrical code requirements for different voltage application
GPM / L/min.
MS120C2T_U MS150C2T_U MS180C2T_U MS210C2T_U MS240C2T_U MS270C2T_U
1
240
12
50
1
60 2 x 40 2 x 50
8
0.84 / 3.2
0.84 / 3.2
86º - 122º
385x260x93
15.1x10.2x3.7
lb
in.
A
86º - 122º
3.6
7.9
385x260x93
15.1x10.2x3.7
1/2” 3/4” 3/4” 3/4” 3/4” 3/4”
1 1 1 1 1
240 V
15kw
63
2 2 3 3 3
2 X 40
2 X 8
0.84/ 3.2 0.84/ 3.2 0.84/ 3.2 0.84/ 3.2 0.84/ 3.2
86º - 122º 86º - 122º 86º - 122º 86º - 122º 86º - 122º
17.6
16.1 x 11 x 3.5
3/4” 3/4” 3/4” 3/4” 3/4”
1
240
15
63
2
2 x 8
5.3
11.7
240V
18kw
75
2 X 50
2 X 8
17.6 17.6 17.6 17.6
16.1 x 11 x 3.5 16.1 x 11 x 3.5 16.1 x 11 x 3.5 16.1 x 11 x 3.5
2 x 8
0.84 / 3.2
86º - 122º
11.7
385x260x93
15.1x10.2x3.7
1
240
18
75
2
Max.150/10
5.3
1 1 1
240 240 240
21 24 27
88 100 113
3 3 3
3 x 40 3 x 40 3 x 50
3 x 8 3 x 8 3 x 8
0.84 / 3.2 0.84 / 3.2 0.84 / 3.2
86º - 122º
5.5
12.1
385x260x93
15.1x10.2x3.7
86º - 122º
5.5
12.1
385x260x93
15.1x10.2x3.7
240 V 240 V 240 V
21kw 24kw 27kw
88 100 113
3X 40 3X 40 3X 50
3 X 8 3 X 8 3 X 8
Max.150/10
86º - 122º
5.5
12.1
385x260x93
15.1x10.2x3.7
W
W
MS_C2P_U MS_C2PMU
(Metal Case)(Injection Mold Case)
Average Household Water Usage
Point of Use GPM*
Shower 2.0
HH
DD
Tub 4.0
Lavatory sink 1.5
Dish washer 2.0
Kitchen sink 2.2
Washing machine 3.0
* Max
Page 8
MS-C2TMU
Stainless Steel Model
MS-C2T_U
Injected Mold Model
Stainless Steel
Rear Cover
Temp. Controller
Thermal cut-out
(Manual Reset)
Temp. Sensor
Water Outlet
Connection
Control Board
Triac
Terminal Block
Flowmeter
Temp. Sensor
Water Inlet
Connection
Picture 2
How Maxwell Tankless Water Heater Works
Undisputed twenty two years of heating
experience and engineering has applied
to develop the Maxwell tankless water
heaters delivering many years of reliable
water heating in your home or in
commercial applications. Below is the
explanation to help you to understand
and to familiarize with the operation of
Maxwell electric tankless water heaters.
1. Once you turn hot water faucet on,
cold water flows through the unit passing
thru a flow meter and inlet temperature
sensor that measure the precise flow rate
and temperature of the incoming water.
4. As the water flows out of the unit the
water is being heated in the patented
multilayer heating chamber and a
second sensor at the outlet makes any
necessary adjustments to ensure
Maxwell tankless water heater delivers
accurate and constant temperature hot
water.
5. System continues to operate and
remains on until no flow is detected then
Rear Cover
Heating Chamber
Thermal cut-out
(Manual Reset)
Temp. Sensor
Water Outlet
Connection
Picture 3
goes to stand-by mode until any hot
water faucet is turn on again.
6. Maxwell advanced micro-processor
has numerous features to monitor and
control with self-diagnostic functions and
displays the working conditions, the
outlet water temperature, working time
and the kW power consumption to
enable the homeowners to optimize the
usage of the heater and maximize
savings, and gain the most benefits from
their investment
Control Board
Triac
Terminal Block
Flowmeter
Temp. Sensor
Water Inlet
Connection
2. Advanced micro-processor control
monitors and senses all working
conditions of the heater and switches
devices to fully modulate the power of the
heating elements from 0-100% to provide
the most precise and consistent hot water
temperatures in the industry.
3. The micro-processor engages heating
elements in stages depending on the
demand requested by the amount of the
water flow and inlet water temperature
using solid state switching triac. Power is
always regulated to avoid excessive
startup surge.
Magnesium powder thermal conductivity insulation
Sheathed
Heating Plate
Hot Water
Cold Water
Aluminium magnesium cast body
Stainless steel water channel
Stainles steel
Nickel-chromium heating element
Page 9
ºF
77º
72º
Heater Sizing GuideHeater Sizing Guide
67º
62º
57º
52º
47º
42º
37º
Model Nº
MS120C2P_U
MS150C2P_U
MS180C2P_U
MS210C2P_U
There are many factors that go into selecting the right water heater: the number of people in the home, type
of showers and tubs, water pressure and geographic region. To make the process easier, we offer the map
and flow-rate table below.
1. On the map, determine the ground water temperature in your area.
2. In the corresponding column select the water heater based on how many fixtures you'll be running
at the same time.
3. The temperatures shown above are based on the average coldest ground temperature in your region.
Inlet Water
Temp.
Heater Sizing Guide
Summer Winter
77º F 72º F 67º F 62º F 57º F 52º F 47º F 42º F 37º F
2.7 gpm 2.4 gpm 2.2 gpm 2.1 gpm 1.8 gpm 1.5 gpm 1.3 gpm 1.2 gpm 1.1 gpm
3.5 gpm 3.2 gpm 2.6 gpm 2.5 gpm 2.3 gpm 2.0 gpm 1.7 gpm 1.5 gpm 1.3 gpm
4.0 gpm 3.6 gpm 3.2 gpm 3.0 gpm 2.7 gpm 2.5 gpm 2.3 gpm 2.1 gpm 1.8 gpm
5.0 gpm 4.5 gpm 3.8 gpm 3.5 gpm 3.2 gpm 2.7 gpm 2.4gpm 2.2 gpm 2.1 gpm
MS240C2P_U
MS270C2P_U
Shower (1.5 gpm) ― Sink Faucet (1.0 gpm)
All data above are based on water leaving temperature 105º F (40º C). 1.5 gpm showerhead flow rate; 1.0 gpm sink faucet
flow rate, and adequate water pressure @ 60 psi. Actual performance may be altered by variations from these parameters.
For voltages less than 240 V the heating capacities will vary and it would be necessary to consider a higher capacity model.
5.6 gpm 4.8 gpm 4.2 gpm 3.5 gpm 3.3 gpm 2.8 gpm 2.6gpm 2.4 gpm 2.2 gpm
6.4 gpm 5.3 gpm 4.7 gpm 4.0 gpm 3.6 gpm 3.3 gpm 3.0gpm 2.7 gpm 2.5 gpm
Shower Sink Faucet
Page 10
Temperature Rise (ºF)
Selection GuideSelection Guide
Model
Power
(kw)
Water
Flow(GPM)
MS120C2T MS150C2T MS180C2T MS210C2T MS240C2T MS270C2T
12 15 18 21 24
0,5 164 205 246 287 328 369
1,0 82 102 123 143 164 184
1,5 55 68 82 96 109 123
2,0 41 51 61 72 82 92
2,5 33 41 49 57 66 74
3,0 27 34 41 48 55 61
3,5 23 29 35 41 47 53
4,0 20 26 31 36 41 46
4,5 18 23 27 32 36 41
5,0 16 20 25 29 33 37
5,5 15 19 22 26 30 34
6,0 14 17 20 24 27 31
6,5 13 16 19 22 25 28
7,0 12 15 18 20 23 26
27
Temp Rise
120
110
100
90
80
70
60
50
40
30
20
10
0
o
F
Temperature Rise
o
F @ 240V vs. Flow Rate (GPM)
0,5 1,0 1,5 2,0 2,5 3,0 3,5 4,0 4,5 5,0 5,5 6,0 6,5 7,0
MS120C2T
MS150C2T
MS180C2T
MS210C2T
MS240C2T
MS270C2T
Flow Rate
GPM
Based upon DOE formula for calculating flow at rise
Flow Rate (gpm) =
Temp rise (ºF)
kW rating x 6.83
Page 11
Series
Made by
Mark of Superior Quality
2190 NW 89th Place, Doral, FL 33172
Tel: (305)594-4972 Fax (305) 499-4378
www.klimaire.com sales@klimaire.com
USC
4002422
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