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.

Freeze Protection for Bosch Gas Tankless Water Heaters

Most all of the Bosch gas tankless water heaters come with built in freeze protection.  The heaters listed below have built in freeze protection and are approved to be installed in some outside installations.

Our Bosch Outdoor Tankless Water Heaters (Bosch 2700ES with AQOK Outdoor Cap / Bosch 2400ES with AQOK Outdoor Cap/ 125BO / 425HNO / 2400EO / 250SXO) have built in freeze protection and are designed to handle an occasional overnight freeze. They plug directly into the wall and provide freeze protection down to 5 deg F above zero. In order for the freeze prevention kit to provide adequate protection,120V AC must always be supplied to the water heater.They are approved for use in the following areas:


Florida, Georgia, North Carolina, South Carolina, Alabama, Mississippi, Arkansas, Texas, Virginia (only in zip codes beginning with the first three digits 233-237), Arizona (in zip codes beginning with the first three digits 850-857 and 864), Oregon (in zip codes beginning with the first three digits 970-975), Washington (in zip codes beginning with the first three digits 980-986), California (except in zip codes beginning with the first three digits 935 or 961).

Installation instructions state that the water heaters must not be installed in a location where it may be exposed to prolonged freezing temperatures. If the heater must be left in a space which is likely to experience prolonged freezing temperatures, all water must be drained from the heater.  If precautions are not taken, resulting damage will not be covered under the warranty. NOTE: Use of agents such as anti-freeze is not permitted as they may cause damage to the water heater's internal components.  The freeze prevention will not protect plumbing outside the appliance from freezing. Precautions should be taken.

The Bosch 250SX/2400E/2400ES and 2700ES come with built in freeze protection and these units are for inside installation only.  The freeze protection helps the unit if it is installed on the inside of an outside wall where it may be cooler than normal.

Propane and Propane Tankless Water Heaters

There has never been a better time for propane to fuel American homes. Homeowners are looking for smart approaches to enhancing home enjoyment and value while minimizing environmental impact. Whether providing an instant flame for gourmet cooking or offering an endless supply of hot water in the shower or backyard pool, propane is helping millions of American families enjoy richer, more comfortable lives with less impact on the planet. And the lower cost of operation means homeowners will be rewarded for a smart choice each month with lower energy bills. Getting more for less while helping the environment - that’s a message worth sharing.

Fact: Propane delivers instant hot water with a lighter impact on the environment.

• Propane tankless water heaters produce 61 percent fewer greenhouse gas emissions than electric tankless models.¹
• Propane tankless water heaters save families an average of 10 to 20 percent of their daily water use.²
• Propane tankless water heaters reduce standby energy loss by up to 20 percent compared with tank water heaters.²
• Propane tankless water heaters cost approximately 60 percent less to operate than tank water heaters.²
• Propane tankless water heaters are Energy Star qualified for efficiency; electric tankless water heaters are not.

Note: Using any kind of Tankless Water Heater is better for the environment than using a tank water heater. And even though electric tank water heaters are not energy star rated, that are significantly more environmentally friendly and less costly to operate than even Energy Star rated electric TANK water heaters.