Installation
The following instructions must be read prior to the installation of a Caleffi 521201A SinkMixer thermostatic
mixing valve. The installer should also be aware of his responsibility and duty of care to ensure that all
aspects of the installation comply with current regulations and legislation. The Caleffi 521201A should
be installed using the appropriate standard, code of practice and legislation applicable to each state and
following the details in this manual. The Caleffi 521201A series must be installed by a licensed plumber.
Prior to the installation of the Caleffi 521201A valve, the system must be checked to ensure that the
system operating conditions fall within the recommended operating range of the valve, i.e.
verify supply temperatures, supply pressures, risk assessments, etc.
The supply system into which the Caleffi 521201A is to be installed must be thoroughly flushed and
cleaned to remove any debris which may accumulate during the installation. Failure to remove any debris
will affect the performance and the manufacturer’s warranty on the product. In areas that are subject to
high levels of aggressive water, provision must be made to treat the water prior to it entering the valve.
The valve is recommended to be installed in a position orieinted with the cover to the right with cold inlet/
outlet on the right side (allowing direct connection to the sink’s cold water inlet fitting) resulting in the hot
inlet/mix outlet on the left aligning direct to the hot water inlet sink fitting. It is essential that the access to
the valve is not obstructed for future maintenance that may be required to the valve or associated fittings.
It is essential that when the installation is designed and/or installed, all current legislation is noted, e.g. the
maximum distance from the outlet of the valve to any terminal fitting.
The connecting hot and cold water supplies must be connected to the valve strictly in accordance with
the indications on the body of the valve. The inlets of the valves are clearly marked with the letter H (Hot)
and C (Cold). The outlet is marked with the word MIX. The valve has male 3/8” compression threads for
conection to standard 3/8” compression faucet connectors and stops.
Where one or both the incoming supply pressures are excessive, a Caleffi pressure reducing valve should
be installed to reduce the pressure(s) within the limits.
The Caleffi 521201A valve is supplied complete with the check valves at the hot and cold inlets.
Mount the 521201A valve to the wall underneath the sink with black plastic mounting bracket supplied
with valve but not attached. Use mounting screw to attach the mounting bracket to the valve to meet
the orientation described above. Break off the adjustment key for adjusting the termperature, see
commisioning section.
To ensure that the performance of the Caleffi 521201A valve is maintained (in the event of cold water
failure), the temperature of the hot water supply at the point of entry to the valve must be a minimum of
18°F higher than the set mixed water discharge temperature.
If the valve is not installed correctly, it will not function correctly and may put the user in danger.
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