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10
3.
4. Radiator heating
5.
4.3
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Installation manual
Underfloor and wall heating
NOTICE
Material damage
Use of a flow temperature limiter in low-temperature systems. Electrical connec-
tion of the temperature limiter according to manufacturer's guidelines.
The accumulator is connected to an underfloor heating system via a mixed heat-
ing circuit.
In the case of underfloor heating systems with plastic pipes according to DIN
4727 (PD), DIN 4728 (PP type 2) and DIN 4729 (VPE) (not 100% impermeable to
oxygen diffusion), the following is advisable:
•
Corrosion-resistant heat exchanger for system separation
Anti-corrosion agent
•
Corrosion and sedimentation damage attributable to disregarding these rec-
ommendations will not
be compensated.
In the case of underfloor and wall heating systems with plastic piping imper-
meable to oxygen according to DIN 4726 E or with copper piping, there are
no additional requirements.
As standard, the accumulator is connected to a radiator system with a mixed
heating circuit. As standard, the buffer tank achieves a temperature of at least
60°C.
Solar thermal system
Both flat-plate and tubular collectors can be connected to the buffer tank. In
order to prevent damage to the collectors, pay attention to the correct concen-
tration of antifreeze in the heat transfer medium.
NOTICE
A heat exchanger register for connection to a solar thermal system is not provi-
ded. This can be realised by an external plate heat exchanger.
Notices for correct operations
The installer must check that the flange bolts are properly tightened before start-
ing up the system. The maximum tightening torque must not exceed 25 Nm.
A suitably sized expansion vessel must be installed on the hot water circuit.
Install a suitable, according label and application, safety valve in the cold water
inlet.
Operation of safety valves must be checked periodically. Periodic control, mainte-
nance and replacement of magnesium anode are prerequisites for the guarantee.
In case of water with a hardness > 17 ° dH (= 30 ° TH), it is advisable to use spe-
cific products in order to avoid excess limestone build-ups.
Grounding connection is mandatory.
4 Requirements for an accumulator
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