Pos. Min.
1
2
3
4
5
6
7
Max.
T (°F)
95
105
115
120
125
132
140
145
150
T (°C)
35
40
45
48
52
56
60
63
65
with: T
HOT
= 158°F (70°C), with: T
cold
= 59°F (15°C), P = 43 psi (3 bar)
Temperature setting and locking
The control knob permits temperature setting between minimum and maximum in one
turn (360°). It also has a tamper-proof system to lock the temperature at the set value.
The
temperature is set to the required value by means of the knob with the graduated scale, on
the top of the valve.
Commissioning
The Caleffi TankMixer™ 520 series thermostatic mixing valve must be commissioned in
accordance with current standards by qualified personnel using temperature measuring
equipment. Caleffi 520510AX, 520516AX and 5210519AX with integral outlet port temperature
gauge provide a time-saving temperature setting process to get close to the desired
temperature. Use of a digital thermometer is recommended for confirming the final setting of
the mixed water temperature. Note: For models purchased without the outlet temperature
gauge, the temperature gauge adapter with temperature gauge can be separately purchased
and field installed, code NA10056 for 3/4" models.
After installation, the valve must be tested and commisioned in accordance with instructions
given below, taking into account current applicable standards.
1) Ensure that the system is clean and free from dirt or debris before commissioning the
thermostatic mixer.
2) It is recommended that the temperature is set using a suitable calibrated digital thermometer.
The valve must be commissioned by measuring the temperature of the mixed water emerging
at the point of use.
3) The maximum outlet temperature from the valve must be set accounting for fluctuations due
to simultaneous use. It is essential for these conditions to be stabilized before commissioning.
4) Adjust the temperature using the adjusting knob on the valve. For safety reasons. it is
advisable to limit the maximum mixed water temperature to 120ºF in domestic hot water
systems.
5) The temperature may be adjusted using the control knob.
a) Adjust the temperature of the mixed water to the desired value.
b) Measure and record the temperature at the cold and hot water inlets.
c) Measure and record the temperature of the water delivered from the tap at the lowest
and highest flow rates.
d) Run a test of the thermal shut-off function. Close the cold water inlet shut-off valve and
check the mixed water delivery. The delivery flow rate should quickly drop to zero.
e) Measure and record the maximum mixed water temperature. The temperature may not
exceed the values permitted in any applicable legislation or code of practice.
f) Restore the cold water inlet supply and measure the water delivery temperature after it
has stabilized. The final temperature measured in this test may not exceed the permitted
values by ±3°F (±2°C).
In case of change to temperature setting, repeat tests in accordance with points d, e, f.
All the above information should be recorded in the commissioning report and updated in the
maintenance report whenever the valve is worked on.
