Procedure for Programming The Wireless Remote TSTAT2

The Bosch Wireless Remote Control (TSTAT2) is used to remotely control the temperature of the Bosch Therm tankless water heater. The TSTAT2 does NOT have the ability to remotely reset the Bosch Therm hot water heater. Below is a more in depth procedure for installing the remote control.

The Bosch Wireless Remote Control (TSTAT2) is designed to work with the following Bosch Therm Tankless Water Heaters: C 1210 ESC, C 1210 ES, C 920 ESC, C 920 ES, C 1050 ES, C 800 ES, Integra 500, C 950 ES, 940ES, 940ESO, 715 ES, Evolution 500 and 830ES as well as the Bosch AquaStar 2700ES and 2400ES heaters.

TSTAT2 Remote Control Installation:

On the "heater" control panel, press and hold Program key while
pressing the ON/OFF button to ON.  Release program key when LCD
displays “188”.  LCD shows “P2”. If not, repeat previous step.

1. Press the + button on the heater to select "P3".  Press and hold Program 
key again for 1 sec.  LCD shows one number and one rotating digit. If not, 
repeat previous step.

The number represents the remote control which is to be registered, the
first remote control will be registered with number “0”, the second with
number “1” and so on.  The rotating digit shows that the electronics is 
expecting a registration and waiting for response from wireless remote.  
If the LCD fails to show a number and rotating digit after repeated attempts, 
double check the wire connections made in section 5.1.

2.  Hold wireless remote control in front of the control panel on the heater and
simultaneously press remote control buttons until the temperature indication 
is shown on the remote control LCD.

3.   Press ON / OFF button on the front of the heater to OFF position and then
back ON.

4.  Press buttons + or - on the remote to reach desired temperature.

New remote control is programmed.

To program a 2nd or 3rd remote to the same heater, follow the steps above and 
then after the remote is programmed you will be able to use the first or 2nd or 
3rd remote to raise or lower the temperature on the heater.  Please remember
the remotes cannot be used to reset the heater if an error code should appear.

Bosch Wireless Remote Control TSTAT2

The Bosch Wireless Remote Control TSTAT2 for the Bosch AquaStar 2700ES / 2400ES / 2400E / 2400EO / 250SX / 250SXO allows you to program your Bosch tankless gas water heater to a comfortable and safe temperature from around your home from a distance of up to 98 ft.

The TSTAT2 remote is particularly useful if you own a jacuzzi or hot tub that requires a hotter water temperature than you normally desire for regular shower use.

Please note that the electrical control of the Bosch AquaStar 2700ES / 2400ES / 2400E / 2400EO / 250SX / 250SXO must be removed and opened in order to install the wireless receiver circuit board to enable the use of the TSTAT2 Wireless Remote Control.

The Newer Bosch models, 2700ES and Bosch 2400ES tankless water heaters have been redesigned to make the installation of the wireless receiver circuit board much easier. The circuit board is basically a plug and play unit.

The TSTAT2 controls the temperature of your water heater and does not have a reset button.   If the heater has an error then a code will be on the display of the heater and the user has to go to the heater to reset it from there and should document the error and then see if it returns after resetting.

The TSTAT2 Wireless Remote Control for Bosch 2700ES / 2400ES /2400E / 2400EO / 250SX / 250SXO features the following:

• LCD displays temperature, error codes and functions
• Temperature measured in °C or °F
• Low battery level indicator
• 98 feet user range
• Alkaline AA LR6 2x1.5V battery power 915 MHz
• Security lock function
• IP X6 Protection
• Priority function - temperature cannot be modified by other user interface when water is running

Don't forget to periodically change the two AA batteries in your Bosch wireless TSTAT2 thermostat as they will certainly corrode over time. The batteries in TSTAT2 thermostats that are kept in bathrooms will corrode faster than in other less humid environments, such as kitchens. Your batteries should be checked yearly for any signs of corrosion and replaced every five years in any case.

TSTAT2 Wireless Remote Control for Bosch Tankless Heaters

The TSTAT2 Wireless Remote Control provides remote temperature control of your Bosch tankless water heater.

It will work with the Bosch AquaStar 2700ES and 2400ES tankless water heaters.

It will also work with the following obsolete Bosch AquaStar models: Bosch 250SX / 250SXO / 2400E / 2400EO.

The TSTAT2 also works with the following Bosch Therm models: 830ES / 940ES / 940ESO / C 1050ES / C 1210ES / C1210ESC.

And it works with the following obsolete Bosch wholesale tankless water heaters: 635ES / 635ESO / 715ES / 800ES / 920ES / 920ESC.

The TSTAT2 Wireless Remote Control is designed to remotely control just the temperature of your Bosch tankless water heater. It does not have a reset button.

Installation is quick and easy. It just requires opening up the control panel, dropping in a small circuit board and connecting the circuit board to the control panel mother board with a short connector wire. The installation manual describes the process of getting your TSTAT2 to sync with your Bosch hot water heater.

Multiple TSTAT2 wireless remotes can be sync'ed with the same Bosch water heater. Temperature control cannot be adjusted while the water heater is in use for safety reasons.

The Bosch wireless remote is great for controlling the output temperature of your tankless water heater if you have a jacuzzi or hot tub. It can also be handy if you want to crank up the water temperature when running certain appliances, such as your dishwasher.

Generally speaking, you want to set your water temperature at the lowest level that will provide you with hot enough water for your shower. The lower the water temperature, the faster the water flows through your Bosch tankless water heater. The faster the water flows through the heater, the less likely that you will experience any on/off cycles if your application flow rate is too near the minimum activation rate of your hot water heater.

Also, why heat up water too hot to use and then have to cool it down seconds later because it is too hot? Lowering the temperature will save you money. Having precise digital remote control of your Bosch tankless water heater's output temperature will allow you to minimize your natural gas or liquid propane consumption - and save you money! Plus , it's fun....

Steve