Install Instructions
Use
Caleffi AngleMix 520 series thermostatic mixing valves are designed to be installed at the
point of distribution to control the temperature of the domestic hot water distributed in the
downstream network. The 520 series valve cannot be used for tempering water temperature
at fixtures as a point-of-use valve. They are not designed to provide scald protection or chill
protection service. They should not be used where ASSE 1070 devices are required. Wherever
a scald protection feature is required, Caleffi 5212 or 5213 series scald protection mixing valves
need to be installed. For safety reasons, it is advisable to limit the maximum mixed water
temperature to 120°F when scald protection devices are not used at each fixture.
Construction details
Thermal shut-off
In the event of accidental cold water supply failure, the shutter seals off the hot water passage,
thus preventing the delivery of mixed temperature water. This is only guaranteed when there
is a minimum temperature difference between the inlet hot water and the mixed temperature
water delivery of 18°F.
Body shape
The “L” pattern configuration facilitates installation of the mixing valve. It offers improved
fluid dynamics for better performance and high Cv values with minimum head losses. It also
reduces installation labor by eliminating a piping elbow in typical installations.
Anti-scale materials
The materials used in constructing the mixing valve are designed to eliminate seizing due to
limescale deposits. All functional parts have been made using a special anti-scale material with
low friction coefficient, ensuring long life performance.
Certication
1. ASSE 1017/CSA B125.3, certified by ICC-ES, file PMG-1357.
2. DZR low-lead brass body is in compliance to NSF/ANSI 372 as certified by ICC-ES,
file PMG 1360.
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