Heat Insulation; Filling The System With Water - Panasonic 140 Installation And Maintenance Manual

10.8. Heat insulation

To guarantee proper energy effi ciency and compliance with current standards, water pipes passing through uninhabited zones
should be properly lagged to retain heat.
To achieve correct insulation with resistivity of 0,04 W/mK, lag the pipes with insulating material with a radial thickness
between 25mm and 30 mm.

10.9. Filling the system with water

Filling or draining the water circuit must be performed by skilled persons using the appropriate devices on
CAUTION
the external hydraulic circuit by the installer.
It is important to ensure that the mains water supply pressure is suffi cient to fi ll the installation.
Once the installation is complete and after having clean and rinsed out the circuit network, you must fi ll the water circuit in
accordance with current professional standards until you obtain the service pressure which will be:
0,5 bar < Service Pressure < 2,5 bar
A 3,5 bar safety valve is mounted in the unit when hydraulic options are selected (single or double pump).
Always check that the manual or automatic air purge valves are installed at all the high points of the hydraulic network.
When two or three units are connected in parallel, it is recommended that the return circuit connections are reversed
(Tichelmann loop system) in order to reduce the pressure loss in each unit's circuit.
V
V
V: Isolating valves. VR: Balancing valves.
Install a balancing valve on the output pipe to adjust the water fl ow.
CAUTION The water inlets and outlets must be connected as described on the labels affi xed near the connections.
When the hydraulic pump option is selected, a safety valve
is mounted (factory assembled) at the Aqualogic water inlet
to prevent over pressurising the circuit. The installer must
install a drain pipe at the safety valve to allow for removal of
water.
UNIT 1
VR
UNIT 2
VR
V
V
20