DeDietrich BL 150, Инструкция по установке, эксплуатации и обслуживанию

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No isolating devices should be located between the valve or safety
device and tank.
The safety device drain pipe must have a uniform and sufficient
gradient and its diameter must be at least equal to that of the outlet
opening of the safety device (to prevent the flow of water being
hindered if the pressure is too high).
The outlet pipe in the valve or safety assembly must not be blocked.
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
Fit the safety valve above the tank to avoid draining the tank during
servicing.
Install a drainage valve at the lowest point on the tank.
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 tank and its
components without draining the entire installation.
These valves are also used to isolate the tank 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.
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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.
BL 150...500 4. Installation
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