After the water connection is made and bubble-
free filling of the tank takes place, the connected
fitting must be tested to ensure it is functioning.
When lifting or turning (venting) the safety valve
test knob, the water must be able to flow out prop-
erly without being hindered by the expansion tank
drain funnel.
In order to check the return flow valve the shut-off
valve is closed and no water may flow out of the
open testing valve. The testing of the safety valve
must take place in accordance with DIN 1988-8.
The operation of the tank takes place through the
hot water valve of the service water fixture (mixing
tap). Therefore, the storage tank is under contin-
uous line pressure. In order to protect the storage
tank from excessive pressure when heating up, the
accumulating expansion water is discharged
through the safety valve.
The return flow valve prevents the return flow of
the hot water into the cold water network during a
pressure drop in the line and thereby protects the
storage tank heating up without water.
With the shut-off valve, the storage tank can be
disconnected from the cold water network and thus
its pressure, and can be emptied through the drain
valve if necessary.
Circulation connection
Due to significant energy loss, a circulation con-
nection should be avoided when possible. If a
highly branched domestic hot water network
requires a circulation line, this must be well insu-
lated and controlled via a time program and/or
depending on the temperature. The switching tem-
perature of one of the thermostats present should
be kept low (45°C).
Flange installation port
Depending on the design of your system, a flange
heating cartridge or a fine-tube heat exchanger
can be installed on the flange that is present.
n
Install the flange heating cartridges in such a
way that the probe of the temperature regulator
is positioned at the top.
n
First tighten the screws by hand.
n
Then tighten the screws in the order specified
below to a torque of 42 Nm.
NOTICE!
Installation and commissioning should only be
performed by trained specialists.
1
3
2
4
Fig. 6: Fitting the flange installation port
1: Flange ring
2: Seal
3: Support plate (only present on unit range EWS
300E)
4: Flange plate
Central heating connection for hot water prepa-
ration
Before being placed into service, the register must
be flushed in order to remove any soiling (e.g.
scale) from the heating cycle.
Storage tanks with registers
The register (heat exchanger) built into the storage
tank is suitable for connecting to a water heater at
any pressure and temperature shown on the speci-
fication label of the hot water tank.
The circulation pump for storage tank must be
used here.
When installing a tank with a register, a circulation
lock/gravity brake must be installed in the register's
inlet or return flow to prevent back-heating into the
heating circuit when the central heating and heat
pumps are turned off or in the case of electrical
operation.
NOTICE!
However, under no circumstances may the inlet
and return flow be blocked, as otherwise the
water in the register will not have room to
expand and there is a risk of damage to the
heat exchanger!
Temperature display, temperature regulation
for circulation pump
When installing third-party control units, ensure
that the storage tank temperature cannot exceed
95°C during operation.
REMKO storage tank systems
20
Содержание EWS 200 E
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