Panasonic Aquarea PAW-DHWM200A Notice D'utilisation page 45

To reduce noise and vibrations of the installed fan take the following steps to prevent the noise and vibrations to be transmitted
through walls into rooms, where it would be disturbing (bedrooms, restrooms):
• install flexible connectors for hydraulic jacks
• install flexible pipes for air inlet and outlet
• isolate the vibrations for wall transmitters
• provide silencers for air inlet and outlet
• air inlet and outlet pipes attach with vibration silencers
• predict isolation of vibrations via flor
• use support elements.
CONNECTION TO WATER SUPPLY MAINS
Connect the water pipeline system according to the attachment signs from the previous chapter.
Installing a safety valve is mandatory in order to assure safe operation. The valve prevents an increase of the pressure in the boiler
by any more than 0.1 MPa (1 bar) above the nominal pressure. The outflow nozzle on the safety valve must have an outlet into the
atmosphere. To assure correct operation of the safety valve, check the valve regularly and, if necessary, remove the limescale and
check that the safety valve is not blocked. When checking the valve, push the lever or unscrew the nut of the valve (depending
on the type of the valve) and open the drain from the safety valve. Water must flow from the valve nozzle, showing that the valve
operation is faultless. During the heating of water, the water pressure in the hot water tank is increased up to the level present in
the safety valve. Since the system prevents backflow of water into the water supply mains, water may be dripping from the outlet
opening on the safety valve. The dripping water may be drained via trap into the drains; the trap is mounted under the safety
valve. The outlet pipe, which is mounted under the safety valve, must be directed downwards, in a place with a temperature above
freezing.
If the installation does not allow draining of the water from the safety valve into the drains, dripping can be avoided by installing an
expansion vessel onto the heat pump inlet pipe. The volume of the expansion vessel must be ca. 5% of the hot water tank volume.
The heat pump is designed for connection to indoor water supply mains without using the relief valve if the pressure in the supply
mains is lower than prescribed on the appliance. If the pressure is higher, a relief valve needs to be installed so as to provide that
the pressure at the inlet to the hot water tank does not exceed the nominal pressure.
H
1 2
Figure 7: Closed pressure system
In avoidance of aggregate damage the heat pump must not operate without water in the tank.
T
1 6
4
3 5 6
LEGEND
1
Stop valve
2 Relief valve
3 Safety non-return valve
4 Expansion tank
5 Drain valve
6 Flexible hose
H Cold water
T Hot water
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