Commissioning
In view of the special applications for which the
thermostatic mixing valve is used, it must be
commissioned according to current regulations, by
qualified technicians equipped with suitable
temperature measurement instruments.
We recommend using a digital thermometer for
measuring the mixed water temperature.
Temperature adjustment
The temperature of the mixed water sent to the user
is set at the desired value using the control knob
with the graduated scale on the valve.
Hydraulic characteristics
Δ
p (bar)
1,5
Δ
p (m w.g.)
10
20
50
0,5
1
2
5
Flow rate
(l/min) (m
3
/h)
5
0,2
1,0
0,5
0,3
0,2
0,1
0,05
15
10
5
3
2
1
0,5
252713
252714
Code
2527
14
2527
13
Ø
1/2”
3/4”
Kv (m
3
/h)
1,5
1,7
Use
In view of their flow characteristics, the 2527 series thermostatic mixing valves can
be installed to control the temperature for individual user fittings (for example wash
basin, bidet, shower) or multiple user fittings.
To ensure stable operation, the mixing valve must be guaranteed a minimum flow
rate of 4 l/min. The system must always be sized in accordance with current
legislation regarding the nominal flow rate to each user fitting.
Selecting the mixing valve size
If the design flow rate is known, taking into account simultaneous use of the sanitary
appliances, the size of the mixing valve is chosen by checking on the graph
provided the head loss produced. In this case, it is necessary to check the
available pressure, the head loss in the system downstream of the mixing valve and
the residual pressure to be guaranteed to the user appliances.
Installation
Before installing the mixing valve, the pipework must be flushed to ensure that no
circulating impurities can compromise its operation. It is recommended to install
always strainers of adequate performance at the water inlet from the hydraulic
network. The 2527 series mixing valve is equipped with strainers at the cold and
hot water inlets. The 2527 series thermostatic mixing valve must be fitted according
to the installation diagram provided in the instruction manual or in this brochure.
The 2527 series thermostatic mixing valve can be installed in any position, vertically
or horizontally.
The following marks are indicated on the valve body:
· hot water inlet by the letter “H” (Hot)
· cold water inlet by the letter “C” (Cold)
· mixed water outlet by the word “MIX
Check valves
In systems with thermostatic mixing valves, check valves should be installed to
prevent undesired backflow. The 2527 series thermostatic mixing valve
incorporates check valves on the hot and cold water inlets, specific for solar hot
water high temperatures.
Thermal transient
During transient, following rapid changes in pressure,
temperature or flow rate, the outlet mixed water
temperature increases with respect to the initial set
point and this increase must be of limited duration to
guarantee safety. The anti-scald mixing valve always
ensures that these conditions are respected.
Temperature
rise
Stabilisation
period
Stable
conditions
Starting
temperature
Time (s)
2K
2K
< 3 s - max
< 0,5 s - max
