Installation Instructions; Mounting The Heater; Pipe Connections; Closed System Thermal Expansion - Bosch Tronic 3000T Manual For Installation

3

Installation instructions

The ES2.5 and ES4 water heaters are designed to be
installed under the sink.
3.1

Mounting the heater

3.1.1 Wall mounting
▶ Fasten the supplied mounting bracket to the wall.
NOTICE: Material damages!
Use screws that are suitable for the wall material and the
weight of the heater.
▶ Hang the water heater on the bracket.
▶ Tug down wards on the heater to ensure that both "fingers"of the
bracket are seated in the mounting slots.
3.1.2 Floor mounting
▶ Heater can sit on floor.
3.2

Pipe connections

▶ Connect the cold water inlet pipe to the inlet tapping (marked with a
blue ring).
▶ Ensure a isolation valve is installed on the cold water supply to the
water heater.
▶ Connect the hot water outlet pipe to the outlet tapping (marked with
a red ring).
The model ES8 can be piped horizontally from the side or
vertically from the top.
Horizontal installation - ES8 Model Only
If you wish to install the unit horizontally, with the piping connections on
the right side:
▶ Install supplied brass plug into tap between hot and cold water
connections.
▶ The supplied Temperature and Pressure Relief Valve will need to be
installed on top. See location of T&P relief valve in Fig. 7.
Vertical installation
If you wish to install the unit vertically, with the piping connections on
top:
▶ Install supplied brass plug into tap on side of water heater.
▶ The supplied Temperature and Pressure Relief Valve will need to be
installed on top. See location of T&P relief valve in Fig. 5 and 6.
Caution
CAUTION:
To reduce the risk of excessive pressures and
temperatures in this water heater:
▶ Install the supplied temperature and pressure
protective equipment required by local codes but not
less than a combination temperature and pressure
relief valve certified by a nationally recognized
testing laboratory that maintains periodic inspection
of production of listed equipment or materials, as
meeting the requirements for Relief Valves and
Automatic Gas Shut-off Devices for Hot Water
Supply Systems, ANSIZ21.22.
Tronic 3000T
The supplied temperature and pressure relief valve is marked with a
maximum set pressure (150 psi) that does not exceed the marked
maximum working pressure of the water heater.
▶ Install the valve in the opening provided and marked for this purpose
in the water heater.
▶ Orient it or provide tubing so that any discharge from the valve will
exit within 6 inches above, or at any distance below, the structural
floor, and cannot contact any live electrical part. The discharge
opening must not be blocked or reduced in size under any
circumstances.
National Plumbing codes may require a drain pan for the water heater
installation. Failure to install one is the sole responsibility of owner and/
or installer. Reference UPC (Uniform Plumbing Code), or IPC
(International Plumbing Code).
3.3

Closed system thermal expansion

Periodic discharge of the temperature and pressure relief valve or failure
of the element gasket may be due to thermal expansion in a closed water
supply system. The water utility supply meter may contain a checkvalve,
backflow preventer or waterpressure reducing valve which will create a
closed water system.
During the heating cycle of the water heater, the water expands causing
pressure inside the water heater to increase. The temperature and
pressure relief valve may discharge hot water under these conditions
which results in a loss of energy and a build-up of lime on the relief valve
seat.
To prevent this from happening, there are two recommendations:
1. Install a diaphragm-type expansion tank that is suitable for potable
water on the cold water supply line. A minimum 0.5 gallon expansion
tank should be used.
Contact the local water supplier or plumbing inspector for information
on how to control this situation. Do not plug the temperature and
pressure relief valve.
Installation instructions | 7
6 720 801 072 (2013/05)