New Bosch model numbers for older Powerstar, Powerstream Pro and 3000 series Point of Use Electric Tankless

 Below are the new Model number replacements for the older Powerstar,  Powerstream Pro and 3000 series Bosch Point of Use Electric Tankless.  The new Bosch replacement models are the new Bosch 4000C models.

Some of the specifications have changed from the older units to the new 4000C series units such as physical size, KW size, reversed water connections etc.  Please review the links below for the newer 4000C models thoroughly.

Older Models                                                 New Bosch Replacement Models        AE3.4, RP3P, 3000 US3                                Bosch Tronic 4000C-3                          AE7.2, RP7P, 3000 US7                                Bosch Tronic 4000C-6                          AE9.5, RP1P, 3000 US9                                Bosch Tronic 4000C-8                          AE12, RP12T, RP12PT, 3000 US12              Bosch Tronic 4000C-10

Please call Pro Tankless Supply at 866-289-4652 with any questions or to place an order.

Overstocked on Bosch Tronic 6000C WH17 & WH27

Global Protankless Supply is currently overstocked on the Bosch Tronic 6000C WH17 & WH27 whole-house electric tankless water heaters.  The Bosch Tronic 6000 C WH17 (45-551721, 45551721) & WH27 (45-557721, 45557721) are ideal for replacing your electric storage tank water heater. The Bosch Tronic 6000 WH17 & WH27 electric whole house tankless water heaters are compact and powerful and can installed virtually anywhere inside the home. Advantages include endless hot water, reduced electricity costs and substantial space savings. These new models feature a digital display and a thermostat control on the front of the unit.  Below are more details and specifications for these 2 models.

The Bosch Tronic 6000C WH27 is the direct replacement for the Bosch Tronic 5000 C WH27 (45-557710, 45557710) and it also replaces the older Powerstream Pro RP27PT (45-551302, 45551302, 45-557702, 45557702) and the Bosch PowerStar AE125 (45-557701, 45557701, 45-551301, 45551301). Please note that the older Powerstream Pro RP27PT and the PowerStar AE125 electric tankless water heaters were 15.5 x 15.25 x 4.5 inches while the Bosch Tronic 6000 Model WH27 measures 12.5 x 15.25 x 4.5 inches, just like the Bosch Tronic 5000 WH27. 

Bosch Tronic 6000 WH27 Electric Tankless Water Heater Specifications:
• Efficiency - 94%
• Weight - 22 lbs.
• Dimensions - 12½" x 15¼" x 4½"
• Water Fittings - ¾" male NPT
• Volts - 240
• Kilowatts - 26.85kWh
• Amps -
 o US: 120 (3 x 40 amps)*
 o CANADA: 120 (1 x 120 amps)**
• Wire Size -
 o US: 8 gauge (6 conductors & ground)
 o CANADA: 2 gauge (2 conductors & ground)**
• Phase - Single
• Minimum Flow Rate at Given Temperature Rise -
 o 45ºF Rise 4.0 gpm***
 o 50ºF Rise 3.7 gpm
 o 60ºF Rise 3.0 gpm
 o 70ºF Rise 2.6 gpm
 o 80ºF Rise 2.2 gpm

The Bosch Tronic 6000C WH17 is the direct replacement for the Bosch Tronic 5000 C WH17 (45-551710, 45551710) and it also replaces the older Powerstream Pro RP17PT (45-551702, 45551702, 45-550302, 45550302) and the Bosch PowerStar AE115 (45-551701, 45551701, 45-550301, 45550301). Please note that the older Powerstream Pro RP17PT and the PowerStar AE115 electric tankless water heaters were 15.5 x 15.25 x 4.5 inches while the Bosch Tronic 6000 Model WH17 measures 12.5 x 15.25 x 4.5 inches, just like the Bosch Tronic 5000 WH17. 

Bosch Tronic 6000 WH17 Electric Tankless Water Heater Specifications:

• Efficiency - 94%

• Weight - 22 lbs.

• Dimensions - 12½" x 15¼" x 4½"

• Water Fittings - ¾" male NPT

• Volts - 240

• Kilowatts - 17.25kWh

• Amps -

 o US: 80 (2 x 40 amps)*

 o CANADA: 120 (1 x 80 amps)**

• Wire Size -

 o US: 8 gauge (4 conductors & ground)

 o CANADA: 2 gauge (2 conductors & ground)**

• Phase - Single

• Minimum Flow Rate at Given Temperature Rise -

 o 45ºF Rise 2.6 gpm***

 o 50ºF Rise 2.3 gpm

 o 60ºF Rise 2.0 gpm

 o 70ºF Rise 1.7 gpm

 o 80ºF Rise 1.5 gpm

Please call Global Protankless Supply at 866-289-4652 with any questions or to place an order.

Limited Stock on Bosch Tronic 6000C WH17 & WH27

Global Protankless Supply would like to announce that the Bosch Tronic 6000C WH17 & WH27 whole House electric tankless water heaters are currently on Back order from Bosch Thermotechnology until the last week in September 2021.  

Global Protankless Supply still has a limited amount of stock on the Bosch Tronic 6000C WH17 & WH27.  Please call soon to place an order while supplies last.  You can view the Bosch Tronic 6000C WH17 & WH27 at the links provided below.

Bosch Tronic 6000C WH17 

Bosch Tronic 6000C WH27

Please call Global Protankless Supply at 866-289-4652 for any questions or to place an order.

Installing Bosch Tronic 6000C WH17 & WH27 in Canada

Global Pro Tankless Supply is an Authorized Bosch Distributor for all Bosch gas and electric tankless water heaters.  The Bosch Tronic 6000C WH17 & WH27 are whole house electric tankless water heaters.  The Bosch WH17 & WH27 can be installed in Canada and are CSA approved.  For installation in Canada, a single electrical breaker is used.  For the Bosch Tronic 6000C WH17 it is required to use a single 80 amp breaker.  For the Bosch Tronic 6000C WH27 it is required to use a 120 amp breaker.  

For installation in Canada please keep in mind the temperature rise needed as the Bosch WH17 will produce a 45 degree temperature rise at 2.6 GPM and the Bosch WH27 will produce a 45 degree temperature rise at 4 GPM.  See the image below that shows the electrical terminal block for wiring in Canada.  Please refer to the installation manual for proper installation.

Please call Global Pro Tankless Supply at 866-289-4652 for further information or to place an order.

Replacement Parts for Bosch Tronic 6000C WH17

Global Protankless Supply now carries all of the replacement parts for the Bosch Tronic 6000C WH17.  We also have new Bosch Tronic 6000C WH17 in stock.  Below is a list of some of the parts we have in stock for the Bosch WH17. 

Element Assembly 1:  #87387017300 (Also known as: 8 738 701 730 0)
Element Assembly 2: #87387017280 (Also known as: 8 738 701 728 0)
Display PCB: #87387109190 (Also known as: 8 738 710 919 0)
PCB Board: #87387109210 (Also known as: 8 738 710 921 0)
Inlet Connection: #87387017340 (Also known as: 8 738 701 734 0)
Outlet Connection: #87387017290 (Also known as: 8 738 701 729 0)
Dual Triac: #87387017230 (Also known as: 8 738 701 723 0)
Thermal Cutout: #87387017270 (Also known as 8 738 701 727 0)
Control Knob: #87387109200 (Also known as: 8 738 710 920 0)

Please call Global Protankless Supply at 866-289-4652 for further questions or to place an order.

Non-Replaceable Modules in Whole-House Bosch Electric Tankless Water Heaters

The larger whole-house Bosch electric tankless water heaters now have non-replaceable black polymer modules inside.  The larger whole-house Bosch electric tankless water heaters used to have sealed copper canisters inside but if one of the elements went bad they could not be replaced.  The new Bosch whole-house electric tankless water heaters now have replaceable elements but the black polymer module is not replaceable.

You will want to make sure the location where the Bosch whole-house electric tankless water heater is installed is heated and the temperature never falls below freezing.  All freezes are NOT covered by the Bosch warranty.  These Bosch electric tankless water heaters do NOT have any built in freeze protection.

Below is a list of the Bosch whole-house electric tankless water heaters that have the new replaceable elements.

17 KW Units
Bosch Powerstar AE-115 (Poly) #45551701
Bosch Powerstar AE-115 (Tronic Style) #45551710
Powerstream Pro RP17PT (Poly)  #45551702
Bosch Tronic WH17 #45551721

27 KW Units
Bosch Powerstar AE-125 (Poly) #45557701
Bosch Powerstar AE-125 (Tronic Style) #45557710
Powerstream Pro RP27PT (Poly)  #45557702
Bosch Tronic WH27 #45557721

36 KW Units
Bosch Tronic 5000C WH36 #7736500680

For further questions or to purchase any replacement parts please call Global Protankless Supply at 866-289-4652.

2015 NAECA Standards for Gas & Electric Residential Tankless Water Heaters

The U.S. Department of Energy has increased the energy factor requirements for residential water heaters effective April 16th, 2015 through the National Appliance Energy Conservation Act (NAECA). This update of regulations will affect all manufacturers selling residential water heaters in the U.S. Residential water heaters include storage type units that store heated water in an insulated tank and instantaneous type units that heat water on demand.

These standards do not apply to electric water heaters under 20 gallons or instantaneous electric water heaters 2 gallons and above.

If you have questions or concerns about specifying or installing Bosch residential tankless water heaters, please contact your local Bosch Sales Representative or call Customer Support at 1-866-642-3198

PCB Control Boards for Powerstream Pro & Bosch Tronic 5000 Electric Tankless

The PCB control board (Printed Circuit Board) is a thermostatically controlled circuit board that allows the whole house electric tankless water heater, models WH17, WH27 & WH36, to be manually controlled by a temperature dial that would range in temperature from 86-131 degrees. The PCB in conjunction with a flow transducer enables the PCB to turn on additional elements in the heater as necessary depending on the amount of gallons per minute (gpm) flowing through the heater.

The PCB would recognize many factors in the function of the heater to maintain a steady temperature and all of this is determined on where the temperature knob is set to, the gpm flowing through the heater, and the temperature of the incoming ground water.

To obtain the maximum heating potential of the Bosch Tronic 5000 electric tankless water heater it must be wired correctly and have the full required voltage to the unit. The Bosch Tronic 5000 WH17 would require 2 independent double pole 40 amp breakers wired with 8 gauge wire and could draw a maximum of 80 amps at full flow through the heater. The WH17 would require the home to be supplied with a minimum of a 150 amp service. The Bosch Tronic 5000 WH27 would require 3 independent double pole 40 amp breakers wired with 8 gauge wire and could draw a maximum of 120 amps at full flow through the heater. The WH27 would require the home to be supplied with a minimum of a 200 amp service.  The Bosch Tronic 5000 WH36 would require 3 independent double pole 60 amp breakers wired with 6 gauge wire and could draw a maximum of 180 amps at full flow through the heater. The WH36 would require the home to be supplied with a minimum of a 300 amp service.

The maximum inlet water temperature allowed into the electric tankless is 86 degrees Fahrenheit.

The Bosch Tronic 5000 WH17, WH27 & WH36 have had many upgrades and engineering improvements over the years. In January 2007 the WH17(RP17PT) & WH27(RP27PT) went from having copper canisters that contain the heating elements to an upgraded Polymer module. The PCB control board was also upgraded to maintain a more steady temperature that works with the heating elements in the polymer modules.

Below are the designated PCB control board part numbers for the units before and after 2007.

Before 2007 with serial #60A 00000 or lower:
Powerstream Pro RP17PT PCB with copper can units, part #93-793777
Powerstream Pro RP27PT PCB with copper can units, part #93-793778

After 2007 with serial number between #60A 80000 - 107:
Powerstream Pro RP17PT PCB with polymer units, part #93-793843
Powerstream Pro RP27PT PCB with polymer units, part #93-793844

Newest Bosch Tronic 5000 units with serial number after 108:
Bosch Tronic 5000 WH17 PCB with polymer units, part #8738701732
Bosch Tronic 5000 WH27 PCB with polymer units, part #8738701738

Bosch Tronic 5000 WH36 PCB with polymer units, part #8738701744