7
HYDRAULIC LINKS TO THE CENTRAL HEATING LOOP
To ensure that the system operates correctly you must use suitably sized and properly routed pipes for the hydraulic
links between the Heat pump and the mains network.
The volume of water flowing through the installation must be sufficient to avoid compressor "short-cycling" and
ensure adequate running times to guarantee its long service life. To ensure the
PAC
functions efficiently, available
installation water volume must be:
200l < available water volume < 250l
When water circulation through heat emitters can be interrupted (thermostatic radiator valves closed) or the heating
supply halted, you must ensure that:
²
The Heat Pump maintains its nominal water flow.
²
The heat pump operates in a loop with a minimum available volume of 200 litres.
The use of a 3-speed circulation pump enables water flow through the appliance to be adapted to pressure losses
in the system.
MINIMUM HEATED WATER VOLUME REQUIREMENTS
1
4
1
1
1
3
2
1
5
6
7
8
Recommended hydraulic layout for installing a PAC as a back-up replacement for a hot water
boiler.
The buffer tank is connected in series on the
PAC
return (inlet) circuit to guarantee the presence of a minimum
volume of water and ensure that the
PAC
operates without "short-cycling".
1
Stop cocks
2
Buffer tank
3
Expansion tank (depending
on
PAC
equipment)
4
Filter or sludge trap
5
Separator drain-valve
6
Circulation pump
7
Relief valve
8
Boiler
Summary of Contents for 3990546
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