Maxwell MS-C2PSU, MS80C2PU, MS100C2PU, MS120C2PU, MS150C2PU Installation Manual

Tankless Electric Water Heater

MS-C2PSU Series

Installation and Instructions Manual

Keep this Instructions Manual in a safe place once your unit is installed.

You may need to refer to it for general instructions or future maintenance.

Thank you for purchasing a quality Maxwell tank-less electric water heater.
To enjoy your new shower at its best, please take time to read this manual thoroughly
and having done so keep it handy for future reference.

CONTENTS

Important Safety Instructions -------------------------------------------------------------------------------- page 2

Electrical Diagram------------------------------------------------------------------------------------------------ page 3

Technical Data and Product Structure----------------------------------------------------------------------page 4

Installation Guideline---------------------------------------------------------------------------------------------page 6

Operation Instructions ------------------------------------------------------------------------------------------page 10

Trouble-shooting---------------------------------------------------------------------------------------------------page 11

Normal Maintenance----------------------------------------------------------------------------------------------page 11

Accessories--------------------------------------------------------------------------------------------------------page 12

MODEL NUMBER

M

S

1 2

0

C

2

W P

U

NOMENCLATURE

Test Calification

U : UL/ETL
C : CSA

Casing Type & Color

B: Injection Molding – Black
D: Injection Molding – Silver w/Dots
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

This Klimaire nomenclature supercedes
all previously issued (06/07/2011)

Power Supply Code (V/ph)

1 – 120 / 1
2 – 240 / 1
5 – 240 / 3

Temperature Control

C : Automatic Constant
P : Power Level

Capacity (kW)

035 – 3.5
045 – 4.5
055 – 5.5
075 – 7.5
080 – 8.0

Heater Type

S : Tankless
H : Holding Tank

Brand:
M: Maxwell

100 – 10.0
120 – 12.0
150 – 15.0
180 – 18.0
210 – 21.0

11

Installation of this product is restricted to indoor locations by licensed plumbing or electrical
contractors only. By installing this product you acknowledge the terms of manufacturer's warranty and
your authorized dealers return policy. Water heaters that have been installed cannot be returned.
If you plan to install your water heater on a second floor/above ground or in a heated attic space you must
follow all code requirements for installation in your area. It is highly recommended to install a drip pan
connected to a safe drain as per code requirements, below the water heater to avoid property damage in
case of eventual leaks, and / or install an active water leak detector and shut off valve to turn off your
water supply in the event that a leak is ever detected.

■ Important Safety Instructions

1. The installation must be in compliance with the National Electrical Code, your local electrical and

plumbing codes.

2. This appliance must be GROUNDED.

3. All wiring and installation jobs must be supervised by a qualified electrician.

4. CAUTION: This product has more than one power-supply connection point. Disconnect all power supplies

before servicing.

5. This appliance is not intended for use by persons (including children) with reduced physical, sensory or mental

capabilities, or lack of experience and knowledge, unless they have been given supervision or instruction concerning

use of the appliance by a person responsible for their safety. Children should be supervised to ensure that they do

not play with the appliance.

6. This appliance MUST be permanently connected to a fixed circuit breaker and it must be installed vertically. DO

NOT install this appliance near flammable substances or near a strong magnetic field place.

7. It is forbidden to switch on this appliance if you think it may be frozen, as this could result in serious damage to

the unit. Wait until you are sure that it has completely thawed out before switching it on.

8. Please check the hot water temperature with your hand to make sure it is at a comfortable temperature before

taking a shower to avoid getting scalded.

9. Before connecting pipes to the water heater hoses, it is extremely important to FLUSH the pipes to wash away all

plumbing paste or residue in the pipes.

10. The heating chamber is treated with composite nano-insulation material; it is natural there might be a bit of smell

or green blue smoke when the unit is used for the first time.

11. If there is damage to the wire, you must contact a qua lified electrician to replace it with an approved wire.

12.

CAUTION: FOR HOUSEHOLD AND INDOOR USE ONLY

13. Combustible materials should be kept at least 2 ft away from your water heater and output water pipe.

14. AFTER TIGHTENING BOTH FITTINGS AT THE WATER HEATER OPEN SEVERAL HOT WATER FAUCETS
AND ALLOW WATER TO RUN THROUGH THE WATER HEATER FOR AT LEAST 3 MINUTES. THIS
PROCESS PURGES ALL AIR FROM THE WATER LINES AND HEATER.
HIS PROCESS MUST BE PERFORMED PRIOR TO TURNING ON THE POWER OF THE WATER HEATER.
FAILURE TO FOLLOW THIS STEP CAN CAUSE PERMANENT DAMAGE TO THE HEATING ELEMENT.

2

■ Product Features

The Maxwell tank-less electric water heaters are made with multi-safety devices patented technology
Additionally, the unit has the following features.

1. Tank-less, instantaneous heating on demand. No pr e-heating. No stand-by heating loss energy-saving.

2. Micro-computer control, adopting patented heating technology. Water is completely separated from
electricity by multi-layers of composite nano insulation material.

3. Over-heating thermal cut-off. When the outlet water temperature reaches over 140℉/60ºC, the electricity
will be cut off automatically to avoid getting scalded and the screen beeps and displays E1.

4. Creepage protection. If the unit detects electricity leakage, the electricity will be cut off within mil seconds
by the creepage protector and the screen displays E2.

5. Malfunction sensor- when the temperature sensor malfunctions, the heater stops working and displays E3

6. Conversion between Fahrenheit degrees and Celsius degrees.

7. This product does not require venting.

AC 240V/60Hz

3

■ Technical Data

Model MS80C2P_U MS100C2P_U MS120C2P_U MS150C2P_U MS180C2P_U MS210C2P_U

Phase

Voltage/Freq V

Wattage kW

Max. amp.load A

Min. required circuit breaker*

A

Min. wire size AWG cooper

Min. water flow to activate

GPM / L/min.

Working pressure PSI/bar

Weight

Product Dimensions

Water connections NPT

Note: *suitable recognized strain relief means shall be provided when the product installed.

kg

mm

lb

in

1 1 1 1 1 1

240 V/60Hz 240 V/60Hz 240 V/60Hz 240 V/60Hz 240 V/60Hz 240 V/60Hz

8kw 10kw 12kw 15kw 18kw 21kw

34 42 50 63 75 88

45 60 60 2 X 40 2 X 50 2 X 60

8 6 6 2 X 8 2 X 8 2 X 8

0.53 / 2 0.53 / 2 0.53 / 2 0.85 / 3.2 0.85 / 3.2 0.85 / 3.2

Max.150/10

7.7 7.7 7.7 12.1 12.1 12.1

3.5 3.5 3.5 5.5 5.5 5.5

385x260x93

15.2"x10.2"x3.7" 15.2"x10.2"x3.7" 15.2"x10.2"x3.7" 15.2"x10.2"x3.7" 15.2"x10.2"x3.7" 15.2"x10.2"x3.7"

385x260x93 385x260x93 385x260x93 385x260x93 385x260x93

1/2” 3/4” 3/4” 3/4” 1/2” 1/2”

(MS150, MS180, MS210)

11.02"

16.14"

WIRE CONNECTIONS TO BREAKERS (MS150, MS180, MS210)

L1 L2 L1 L2

DOUBLE POLE BREAKER

40 Amp MS150
50 Amp MS180
60 Amp MS210

DOUBLE POLE BREAKER

40 Amp MS150
50 Amp MS180
60 Amp MS210

E / G

EARTH/

GROUND

4