Panasonic Aquarea WH-MDF06E3E5 series - Hydraulic installation

6 – 17Aquarea air/water heat pump – Installation manual for compact systems 03 / 2013
6
Hydraulic installation
Hydraulic installation
6 Hydraulic installation
Danger! 7KHZRUNFDQRQO\EHSHUIRUPHGE\TXDOLÀHGRUFHUWLÀHGSHUVRQQHO
Follow these instructions to prevent damage to the compact unit and
the other components of the system:
 Flush the pipelines before connecting the device, to remove impurities.
Impurities can damage the components of the device.
 Ensure that the components installed in the wet circuit can withstand
high operating water pressures. Use only suitable sealants which can
withstand the pressure and temperature of the system.
 Never use worn pipes.
 Do not use a pipe wrench to mount the connections. Use two
adjustable wrenches to tighten the connection.
Warning! There must be at least 50 litres (for 12.0 to 16.0 kW devices) or 30 litres
(for 6 to 9.0 kW devices) of liquid in the system. If these values are not
reached, an additional storage tank must be installed.
The standard expansion tank can be used for heating systems
with a to-
tal water quantity in the system of less than 200 litres (without a hot-water
tank) and a static system height of no more than
7 metres (difference of
the highest point of the system to the expansion tank).
If the total water quantity is greater than 200 litres or greater static
heights are required, pressure retention must be ensured via an expan-
sion tank to be installed by the customer. In general, the pressure level
of the pressure relief valve must be observed. See the technical details
for the pressure level, to a maximum of 3 bar.
Aquarea heat pumps may only be installed as sealed systems without
direct contact of the heating water to the ambient air.
NOTE The compact units feature an expansion tank as standard (approx.
10 litres of air capacity, initial pressure of 1 bar). By contrast, the mini
compact units WH-MDF06E3E5 and WH-MDF09E3E5 with heating
capacities of 6
and 9 kW have an expansion tank with only 6 litres of
volume.
Accordingly, these devices can only be used for heating systems
with a total water quantity in the system of under 150 litres.
See the design handbook for split systems and compact systems for
connection variants.