Bosch Therm 660EF/660EFO Remote Controller

The Bosch Therm 660EF/660EFO Wired Remote Controller, part number BRC01US is specifically designed for the Bosch Therm 660EF/660EFO units.  The wired remote gets wired to the Bosch 660EF/660EFO unit using 18 ga wire and can be installed up to 300' maximum away from the heater.

The wired remote should be installed in a location that is accessed easy from the main point of hot water use such as on the bathroom wall.  The default setting for the 660EF/660EFO is 120° F.  For most residential applications, the recommended setting is 120° F. 125° water is scalding and is very dangerous.

The Bosch Therm 660EF/660EFO gas tankless water heaters come with wired, marked connectors in the unit by the main control board.  The wired connectors are marked, 120°, 130°, 140° and 160°.  You must have the remote controller to achieve the 160° temperature. 

The remote control comes with many special options.  The remote control will give error codes on the display in the event of a problem (refer to the service manual or contact Bosch Technical Support for error codes and troubleshooting).  The upper limit of the hot water supply temperature can be changed to 100°F, 105°F, 110°F, 115°F, 120°F, 125°F, 130°F, 135°F, 140°F and up to 160 with the remote control.  There is also a unique flow meter alarm setting on the remote control.

The flow meter alarm setting can be used to set a desired amount of gallons of water maximum that is normally used.  As an example:  say your bath tub holds 50 gallons of hot water.  You can press and hold the flow meter alarm until it starts flashing and then set the remote to a maximum of 42 gallons of water.  So when you go and fill the bathtub with hot water and once the remote senses it has flowed 42 gallons of water an alarm will sound and then you would have to physically go and shut the water off at the source.  The alarm will stop after 10 seconds.