LG THERMA V AHNW16606B0, Installation Manual, Page: 25 / 65

Installation of Indoor Unit
Installation Manual 25
ENGLISH
The dimensioning of circulation pumps, valves, safety elements and pipes has to be performed by
the design engineer according to the heating/cooling capacity of the device.
Before connecting the device, it is necessary to rinse the pipe system thoroughly and remove
impurities (solid particles, oils, greases ...).
Use suitable detergents if necessary.
The closing valve with exhaust has to be installed lower than the pipe connections on the device.
DHW system
The hydraulic connection has to be installed in accordance with the national and local regulations for
connecting buffer tanks for DHW to enable the water flow in full force. To prevent water leakage,
install a drain through the floor below the level of the device. The following picture shows the correct
hydraulic connection of the device.
In the event of a longer absence from home and no use of hot water, close the valve on the cold
water supply.
Because different materials are used for pipe installation, all connections on the device (cold and
hot water, circulation, heat conductor) have to be galvanically isolated; otherwise corrosion of
connections can occur on the inner side of the buffer tank for DHW. We recommend placing
galvanic isolators made of red brass the length of at least twice the diameter of the pipe on the
connections.
The DHW tank is intended for storing drinking water, this is why the water has to be in accordance
with the national regulations on drinking water in force; otherwise, damage to the device and a
termination of the warranty can arise.
The cold DHW connection of the device must be fitted with a safety valve with the rated pressure
of 0.6 MPa (6 bar).
For proper operation of expansion vessel, a suitable setting of the vessels operating pressure must
be made. The pressure is set in regards to the pressure in the DHW system. The setting needs to
be checked every 12 months.
The cold DHW connection must be fitted with an expansion vessel suitable for drinking water. The
selection and installation must be in accordance with the standard DIN 4807 T5.
Hydraulic connection