6
Installation
Preparation
A
safety valve
(max. 8 bar) must be installed in the cold water supply corresponding
to standards DIN 1988 und 4753, part 1 and TRD 721.
If the cold water pressure > 8 bar, fit a
diaphragm
pressure reducer
max. 8 bar.
The installation of
flushing equipment
before and after the plate heat exchanger in
the primary and secondary circuits is recommended for descaling or cleaning as nec-
essary.
Special accessories: VMS pre-mixing set
If the tank is operated at a temperature higher than 70°C a
pre-mixer
that restricts the tem-
perature to less than 70°C must be used in the primary circuit.
The
VMS
pre-mixing set is suitable for both Fristar models (left pump, right pump).
Figure
: Connection for Fristar with
right pump
Technical data
Setting range:
45°C
– 65°C
Flow coefficient of mixing valve
4.5m³/h
Connections for Fristar
¾”
The thermal mixing valve is also available as an extra under the
TMV
designation.
Thread 3/4“
Thread 3/4“
Thread 3/4“
Thread 1
“
