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OPERATION  

SAFETY

EN

GL

ISH

WWW.STIEBEL-ELTRON-USA.COM 

DHC-E | 

3

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 plumb-
er. 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 opera-
tion 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. al-
teration, or service of this appliance all circuit breakers 
and disconnect switches servicing the appliance must be 
turned off. 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 elec-
trically 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 scal-
ding 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 super-
vision or after appropriate instructions by a person res-
ponsible 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.

Summary of Contents for MEGABOOST

Page 1: ...105 F 120 F Residential Use 120 F 140 F Commercial Only F C Tankless electric booster for tank water heaters Off The MegaBoost is tested and certified by WQA against NSF ANSI 372 for lead free compliance STIEBEL ELTRON Inc 17 West Street West Hatfield MA 01088 Tel 413 247 3380 Fax 413 247 3369 Email info stiebel eltron usa com www stiebel eltron usa com ...

Page 2: ...7 10 2 Terminal block_______________________________________________________ 7 11 Commissioning _________________________________________________ 8 11 1 Appliance handover________________________________________________ 8 12 Troubleshooting ________________________________________________ 8 12 1 Display options LED diagnostic traffic lights ________________ 8 12 2 Fault table_______________________...

Page 3: ...ice technicians DANGER Electrocution Before proceeding with any installation adjustment al teration or service of this appliance all circuit breakers and disconnect switches servicing the appliance must be turned off 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 Fa...

Page 4: ...he 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 efficiency and durability scaling the optimum temperature setting lies between 86 F 30 C and 120 F 50 C In case the Power light is flashing while the appliance operates the water flow rate exceeds the heating capacity of th...

Page 5: ...eater CAUTION Electrocution Unit must be installed in a vertical position with the water fittings pointing downward In this position the unit is splashproof so that no water can soak in 8 2 Choosing installation configuration The Megaboost can either pre heat an electric tank water heater or be pre heated by one The chart shows the effect of installation on the tank cold water inlet versus on the ta...

Page 6: ...ated for maintenance purposes The tank water heater should have its own isolation valve in addition to the valve for the MegaBoost Cold water connection inlet is on the right side of the ap pliance hot water connection outlet is on the left side of appliance Tankless water heaters such as the MegaBoost are not required to be equipped with a Pressure and Temperature Relief Valve P T If the local in...

Page 7: ...ections Then feed wires through strain relief clamp and tighten clamp down on wire The live wires must be connected to the slots on the terminal block marked L and L The ground wire must be connected to slot marked with the ground symbol Strain relief clamp with screws and rubber seal are provided 10 1 Temperature setting anti scalding protection 26_02_02_1089 Connect the lead of the electronic te...

Page 8: ... at tention to the safety information Hand the operating and installation instructions to the user 12 Troubleshooting DANGER Electrocution To test the appliance it must be supplied with power 12 1 Display options LED diagnostic traffic lights Display options red illuminates in case of faults yellow illuminates when the appliance is heating water green flashing The appliance is supplied with power 1...

Page 9: ... circuit breaker1 DP A 35 40 Min recommended wire size2 copper AWG 8 8 Min water flow to activate appliance GPM l min 0 26 1 Protection level according to IP 24 Max inlet water temperature F C 131 55 Nominal water volume GAL l 0 13 0 5 Working pressure max PSI bar MPa 150 10 1 Tested to pressure PSI bar MPa 300 20 2 Weight lbs kg 5 9 2 7 Water connections 1 2 NPT 1 This is our recommendation for o...

Page 10: ...ermal cut out 286369 3 Electronic control appliance 291851 4 Coding plug 283455 5 Back panel 292578 6 Flow sensor DFE 286461 7 Cold water connection 291699 8 Filter screen 252430 9 Hot water connection 278634 10 Plastic cover 11 Wiring block 279998 12 Axis connection plug 254312 13 Electronic temperature control 286359 14 Temperature adjustment knob 254307 15 Outlet temperature sensor 280677 ...

Page 11: ...as directed by Manufacturer and other than in accordance with applicable building codes 4 failure to maintain the Heater or to operate the Heater in accordance with the Manufacturer s specifications 5 operation of the Heater under fluctuating water pressure or in the event the Heater is supplied with non potable water for any duration 6 improper installation and or improper materials used by any ins...

Page 12: ...s and technical changes Stand 8643 STIEBEL ELTRON Inc 17 West Street 01088 West Hatfield MA Tel 0413 247 3380 Fax 0413 247 3369 info stiebel eltron usa com www stiebel eltron usa com A 330773 40358 9271 4 AMHCMD CbJADD ...

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