Installation
11
Installing outlet pipes for the safety valve
A safety valve with 3 bar opening pressure has already
been installed for the secondary circuit at the factory. A
membrane expansion vessel can be connected to this
T-piece.
Fig. 4-3: T-piece with safety valve
DANGER!
Safety valve outlet
The safety valve outlet must be directed to the ground
in a pipe so nobody is endangered by hot water or
steam.
The safety valve outlet must be fed to the sewage
system (e.g. duct) via a clearly visible, open route
(siphon funnel). This will ensure that malfunctions,
especially a failure of the safety valve to close, can
be detected. If no connection is available to the
sewage system, the outlet must be directed to the
ground in a pipe.
For frost protection in the secondary circuit, guide
the safety valve outlet into a canister
DANGER!
Safety valve outlet
The safety valve outlet must be directed to a canister
with sufficient dimensions in a pipe so nobody is
endangered by hot water or steam.
The safety valve outlet must be directed into the
canister via a clearly visible, open route (siphon
funnel) so that malfunctions, especially a failure of
the safety valve to close, can be detected. In the
same way, the frost protection is collected when
opening the safety valve and can be filled again.
Establishing a CAN-bus connection to the boiler
Establish the bus connection between the boiler and
the module with the supplied CAN-bus line. Also see
for more information.
Contact thermostats required for underfloor and
wall heating
For safety reasons, contact thermostats must be
installed for operation with underfloor and wall
heating. In the event of a malfunction, they switch off
the affected heating circuit to protect it from
excessively high flow temperatures.
They are available separately and pre-wired.
Fig. 4-4: Contact thermostat
In case of risk of frost, install an additional contact
thermostat as frost protection
If the secondary side is filled with frost protection
because it is designed as an outdoor heat-
ing system, for example (heating of paths, drives...), a
contact thermostat must be installed for the primary
side in order to prevent the heat exchanger from
freezing.
This is clamped so that the secondary pump switches
off as soon as the temperature set on the contact
thermostat is exceeded (e.g.: 10 °C).
Содержание System Separation Module
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