4
The cross section of the discharge pipe from the safety unit must
be at least equal to the cross section of the opening of the safety
unit outlet.
Germany
: Define the dimensions of the safety valve in accordance
with the DIN 1988 standard.
Capacity (litres)
Dimension of the valve
Min. dimension of the inlet
connection
Heating output
(kW) (max)
< 200
R or Rp 1/2
75
200 to 1000
R or Rp 3/4
150
4
Fit the safety valve above the calorifer to avoid draining the tank
during servicing.
4
Install a drainage valve at the lowest point on the calorifer.
n
Isolating valves
Hydraulically isolate the primary and secondary circuits using stop
valves to facilitate maintenance operations on the unit. The valves
make it possible to carry out maintenance on the calorifer and its
components without draining the entire installation.
These valves are also used to isolate the calorifer unit when
conducting a pressurised check on the leak tightness of the
installation if the test pressure is greater than the admissible operating
pressure.
CAUTION
If the mains pipes are made of copper, fit a sleeve made
of steel, cast iron or any other insulating material between
the tank’s hot water outlet and the pipes to prevent
corrosion to the connection.
n
Connecting the domestic cold water
Make the connection to the cold water supply according to the
hydraulic installation diagram.
¼
Refer to the installation and maintenance instructions of the
boiler
Install a water drain in the boiler room and a funnel-siphon for the
safety unit.
The components used for the connection to the cold water supply
must comply with the prevailing standards and regulations in the
country concerned. Fit a one-way valve to the domestic cold water
circuit.
4
In regions where the water is very hard (Th > 20°F), we
recommend fitting a softener. Water hardness must always be
between 12°F and 20°F to be capable of providing effective
protection against corrosion. The softener does not bring about a
derogation from our warranty provided that it is approved and set
pursuant to the codes of practice and is regularly inspected and
maintained.
SR130
4. Installation
26/03/2014 - 300009755-001-03
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