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4. Installation
32
n Size
4 The diameter of the safety unit and its connection to the calorifer
must be at least equal to the diameter of the domestic cold water
inlet on the calorifer.
4 There must be no cut-off element between the valve or the safety
unit and the domestic hot water calorifer.
4 The outlet pipe in the valve or safety assembly must not be
blocked.
To avoid restricting the flow of water in the event of overpressure:
4 The discharge pipe from the safety unit must have a continuous
and sufficient gradient.
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.
Calorifer capacity
Minimum inlet connection size
(litres)
of the safety valve
< 200
200 to 1000
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.
200SE-2S - 300SE-2S
Heating output
(kW) (max)
R or Rp 1/2
R or Rp 3/4
26/04/2016 - 7607575-05
75
150
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