STIEBEL ELTRON MEGABOOST Operation And Installation

OPERATION AND INSTALLATION

TANKLESS ELECTRIC BOOSTER FOR TANK WATER HEATERS

»MEGABOOST

Max. power, below set temp.

Modulating power

86°F - 105°F Hand Washing
105°F - 120°F Residential Use
120°F - 140°F Commercial Only

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Tankless electric booster

for tank water heaters

Off

The MegaBoost is
tested and certifi ed
by WQA against NSF/
ANSI 372 for lead free
compliance.

STIEBEL ELTRON, Inc.

17 West Street | West Hat fi eld, MA 01088
Tel. [phone] | Fax [phone]
Email [e-mail]
www.stiebel-eltron-usa.com

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CONTENTS | OPERATION

OPERATION

1. General information ___________________________________________ 2

1.1 Safety information __________________________________________________ 2

1.2 Other symbols in this document _________________________________ 2

2. Safety ____________________________________________________________ 3

2.1 Intended use _________________________________________________________ 3

2.2 General Information________________________________________________ 3

2.3 Safety Precautions __________________________________________________ 3

3. Register your product _________________________________________ 3

4. General __________________________________________________________ 4

5. Troubleshooting ________________________________________________ 4

INSTALLATION

6. Safety ____________________________________________________________ 5

6.1 General safety instructions _______________________________________ 5

7. Appliance description _________________________________________ 5

7.1 Standard delivery ___________________________________________________ 5

8. Mounting the appliance _______________________________________ 5

8.1 Application ___________________________________________________________ 5

8.2 Choosing installation confi guration _____________________________ 5

8.3 Typical installation confi gurations ______________________________ 5

8.4 Mounting _____________________________________________________________ 6

9. Water connections _____________________________________________ 6

10. Electrical connection ___________________________________________ 6

10.1 Temperature setting/anti-scalding protection _______________ 7

10.2 Terminal block _______________________________________________________ 7

11. Commissioning _________________________________________________ 8

11.1 Appliance handover ________________________________________________ 8

12. Troubleshooting ________________________________________________ 8

12.1 Display options LED diagnostic „traffi c lights“ ________________ 8

12.2 Fault table ____________________________________________________________ 8

13. Normal maintenance ___________________________________________ 8

14. Technical Data __________________________________________________ 9

14.1 Dimensions ___________________________________________________________ 9

14.2 Wiring diagram _____________________________________________________ 9

14.3 Data table ____________________________________________________________ 9

14.4 Spare parts__________________________________________________________10

15. Warranty _______________________________________________________ 11

OPERATION

1. General information

Note

Read these instructions carefully before using the applian­ce and familiarize yourself with its functions. Keep these
instructions safe. Pass on the instructions to a new user if
required.

1.1 Safety information

1.1.1 Structure of safety information

KEYWORD: Type of risk
Here, possible consequences are listed that may result
from not observing the safety information.

 Steps to prevent the risk are listed.

1.1.2 Symbols. type of risk

Symbol Type of risk

!

Injury

Electrocution

Burns or scalding

1.2 Other symbols in this document

Note

Notes are bordered by horizontal lines above and below
the text. General information is identifi ed by the symbol
shown on the left.

 Read these notes carefully.

Symbol

!

Damage to the appliance and environment

Appliance disposal

 This symbol indicates that you have to do something. The ac-

tion you need to take is described step by step.

OPERATION

SAFETY

ENGLISH

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2. Safety

Observe the following safety information and regulations.

Operate the appliance only when fully installed and with all safety
equipment fi tted.

2.1 Intended use

The appliance is intended to boost domestic hot water output of a
tank water heater.

Any other use beyond that described shall be deemed inappropriate.

Observation of these instructions is also part of the correct use of
this appliance.

2.2 General Information

Read this entire manual. Failure to follow all the guides, instructions
and rules could cause personal injury or property damage. Improper
installation, adjustment, alteration, service and use of this appliance
can result in serious injury.

This appliance must be installed by a licensed electrician and plumb­er. The installation must comply with all national, state and local
plumbing and electric codes. Proper installation is the responsibility
of the installer. Failure to comply with the installation and operating
instructions or improper use voids the warranty.

Save these instructions for future reference. Installer should leave
these instructions with the consumer.

If you have any questions regarding the installation, use or opera­tion of this water heater, or if you need any additional installation
manuals, please call our technical service line, see last side.

2.3 Safety Precautions

!

DANGER: Injury
Please read and follow these instructions.
Failure to follow these instructions could result in serioius
personal injury or death.

!

Damage to the appliance and the environment

The appliance must be installed by a licensed electrician
and plumber. The installation must comply with all national,
state and local plumbing and electric codes.
Service of the appliance must be performed by qualifi ed
service technicians.

DANGER: Electrocution
Before proceeding with any installation, adjustment. al­teration, or service of this appliance all circuit breakers
and disconnect switches servicing the appliance must be
turne d of f. Failure to do so could result in serious personal
injury or death.

DANGER: Electrocution
Never remove the appliance cover unless the electricity
servicing the appliance is turned off. Failure to do so could
result in personal injury or death.

DANGER: Electrocution
The appliance must be properly grounded. Failure to elec­trically ground the product could result in serious personal
injury or death.

DANGER: Burns
Water temperatures over 125°F (52°C)can cause severe
burns instantly or death from scalding. A hot water scal­ding potential exists if the thermostat on the appliance is
set too high. Households with small children, disabled or
elderly persons may require that the thermostat be set at
113°F (45°C) or lower to prevent possible injury from hot
water.

!

WARNING: Injury
Where children or persons with limited physical, sensory
or mental capabilities are to be allowed to control this
appliance, ensure that this will only happen under super­vision or after appropriate instructions by a person res­ponsible for their safety.
Children should be supervised to ensure that they never
play with the appliance.

3. Register your product



YOU MUST REGISTER THIS PRODUCT WITHIN 90 DAYS OF PURCHASE
ON OUR WEB SITE IN ORDER TO ACTIVATE THE STANDARD

WARRANTY OR TO BE ELIGIBLE FOR THE EXTENDED WARRANTY. GO TO OUR
WEB SITE AT WWW.STIEBEL-ELTRON-USA.COM AND CLICK ON REGISTER
YOUR PRODUCT.

Before beginning the registration process, we suggest that you
gather the necessary information which will be as follows:

Number listed after “Nr.”
Place of Purchase
Purchase Date
First & Last Name
Email address
Physical Address
Phone Number
Installation Date

IF YOU HAVE ANY QUESTIONS CONCERNING THE REGISTRATION
PROCESS OR WARRANTY OPTIONS, PLEASE CONTACT STIEBEL
ELTRON USA DIRECTLY AT (800)-582-8423.

OPERATION

GENERAL

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4. General

The tankless water heater differs from conventional storage type
water heaters in several ways. It does not store hot water. Instead,
water is heated instantaneously as it fl ows through the appliance.
Due to the absence of stand-by losses, the appliance offers greater
energy effi ciency than storage type water heaters.

The MegaBoost should be installed in conjunction with a storage
tank water heater.

MegaBoost can be installed on the cold water inlet or on the hot
water outlet of the tank water heater. Installation at either location
will greatly increase the amount of hot water the tank is able to de­liver (fi rst hour rating). Either installation location will also shorten
the recovery time necessary for the tank to recharge, but this effect
is far greater with installation on the cold water inlet.

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The input of heat into the water is electronically controlled. The
appliance will deliver any water temperature between 86°F (30°C)
and 140°F (60°C). Please set the desired temperature using the knob
on the front cover.

Note:

For reasons of appliance effi ciency and durability (scaling),
the optimum temperature setting lies between 86°F (30°C)
and 120°F (50°C).

In case the “Power” light is fl ashing while the appliance operates,
the water fl ow rate exceeds the heating capacity of the appliance.
Reduce the hot water fl ow rate in order to let the appliance achieve
the set point temperature. The maximum temperature is electroni­cally limited to 140°F (60°C). In case you have questions regarding
the way you plan to use the appliance, please call our technical
service line, see last side.

5. Troubleshooting

Symptom Possible Cause Solut ion

No hot water not enough flow rate

to activate appliance

clean faucet aerator or shower head

Water not hot
enough

water flow too high reduce water flow rate until light on

front cover stops blinking

If you cannot remedy the fault, notify the contractor who installed
the appliance. To facilitate and speed up your enquiry, please pro­vide the serial number from the type plate (000000-0000-000000).