Installation
Before installing a Caleffi 2521 series mixing valve, the system
must be inspected to ensure that its operating conditions are
within the range of the mixer, checking, for example, the supply
temperature, supply pressure, etc.
Systems where the Caleffi 2521 series mixing valve is to be
fitted must be drained and cleaned out to remove any dirt or
debris which may have accumulated during installation.
Failure to remove
dirt or debris may affect performance
and the manufacturer's product guarantee.
The installation of filters of appropriate capacity at the inlet
of the water from main supply is always advisable.
In areas which are subject to highly aggressive water,
arrangements must be made to treat the water before it
enters the valve.
Caleffi 2521 series mixing valve must be installed in accordance
with the diagrams in this manual, taking into account all current
applicable standards.
Caleffi 2521 series mixing valve can be installed in any position,
either vertical or horizontal.
The following are shown on the valve body:
- Hot water inlet, color red and marked “HOT”.
- Cold water inlet, color blue and marked “COLD”.
- Mixed water outlet, marked “MIX”.
It is essential that access to the valve is totally unobstructed for
any maintenance which may be required to the valve or
connections. The pipework from/to the valve must not be used to
support the weight of the valve itself.
Use
Thermostatic mixing valves are typically installed at the
outlet of hot water storage tanks in solar systems to ensure
constant temperature of the mixed water supplied to the end user.
Because of their flow characteristics, the valves can be installed
to control the temperature for both single point of use and for point
of distribution. In order to guarantee the delivery of mixed water at
the set temperature, the 2521 series thermostatic mixing valves
must have a minimum flow rate of 1.3 gpm.
