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.

Bosch Tronic 5000 WH17 & WH27

Bosch Tronic 5000 WH 17 & WH27 Electric Tankless Water Heaters

Ideal for replacing your electric storage tank water heater. The Bosch Tronic 5000 WH17 & WH27 electric whole house tankless water heaters are compact and powerful and can be installed virtually anywhere inside the home. Advantages include endless hot water, reduced electricity costs and substantial space savings.

Designed to replace a 20 - 40 gallon electric tank. The Bosch Tronic WH17 &  Bosch Tronic WH27 electric tankless water heaters are built to last. They have Plastic Polymer Modules and brass fittings. Each heater module is protected by an electro-mechanical thermal cut-out. If the temperature of any of the heater modules gets too high (over 195 degrees), then the cut-out will trip and cut the power to that heater module. If the cut-out trips, it must be reset while the circuit breakers are off. If you are not comfortable or qualified to perform this task, consult the original installer or a licensed electrician. This cut-out will only trip in exceptional circumstances. These small electric tankless water heaters can be installed virtually anywhere in the home and, of course, produce an endless supply of hot water.

There are many changes in the new Bosch Tronic 5000 WH17 and the WH27 compared to the older models Powerstream Pro RP17PT and RP27PT.

The new improvements for the Bosch Tronic 5000 WH17 and the WH27are:

• The units overall height is shortened by 4 inches due to reconstruction and placement of the main PCB board in the bottom of the unit.  (WH17 PCB Board #8-738-701-732, WH27 PCB Board #8-738-701-738).
• The Heating element assembly modules inside the unit have been redesigned to change the flow of the water in the modules to a different angle so as to not allow the mineral deposits to build up on the elements.
• There has been new single triac and dual triac PCB boards attached to the top of the heating modules as to give the heater more sensibility and maintain a more consistant heat.  (Single Triac PCB #8-738-701-733, Dual Triac PCB #8-738-701-723).
• The Thermal Cutouts on the top of the heating modules have been redesigned to trip at a little lower temperature of 195 degrees F to keep the elements from being damaged and overheating and hurting the piping and modules.

The minimum activation rate required for the unit to activate. (Activation rates: WH17 = 0.6 GPM, WH27 = 0.8 GPM).

The WH17 & WH27 are designed for cold potable water only. These water heaters are not designed for preheated water or recirculation applications. Increase flow rate where ever possible if water is coming out too hot.

Verify incoming water supply is at least 30psi. For people on well systems, the recommended pressure range is 30-50psi.

Maximum flow rates for each unit are as follows. WH17 = 2.3gpm, WH27 = 3.5gpm.

Descaling Powerstream Pro RP17PT & RP27PT

The Bosch Pro electric tankless water heaters, Powerstream Pro models RP17PT and RP27PT are high kilowatt electric tankless heaters that heat water on demand as the water passes through them. The modules inside consist of coiled elements that heat the water. The heating elements produce extreme heat inside the modules to heat the water on demand.

The heat that is produced by the heating elements in the modules sometimes counteracts with the mineral deposits in the water. If there is a high mineral content due to a hard water area then these mineral deposits known as "scale deposits" will over time attach themselves to the heating coils inside the modules.

All Bosch Powerstream Pro electric tankless water heaters should never be descaled with any type of solution such as vinegar, muriatic acid, etc. The use of descalants flushed through the heater does not have much effect on the mineral deposits attached to the elements. Another point of trying to flush descalant through an electric tankless heater is that it will loosen some of the mineral deposits in the heater and will have a damaging effect on the flow transducer and other parts inside the tankless heater that detects the flow of water and will interrupt the signal to the circuit board itself.

The best protection against mineral deposits (scale) forming on the coils in the electric tankless heater is to check the quality of the water in your area before installing and if the water has a high mineral content then it is recommended to install a water softener or scale stopper system. The water softener or scale stopper will filter out almost all of the minerals and treat the water so the electric tankless water heater will have a longer life with less minerals building up inside.