Rev. B 07-2013
32
MTEC.3800.GB-B-1 Operation and maintenance WSA series English
WSA
Water chiller
If the fluid in the circuit contains anti-freeze, it MUST not be allowed to run away to drain. It must be collected for
possible re-cycling or for correct disposal.
4.17 Filling the hydraulic circuit
4.18 Emptying the installation
Before filling, check that the installation drain valve is closed.
•
Open all pipework, heat pump and terminal unit air vents.
•
Open the shut off valves.
•
Begin filling, slowly opening the water valve in the filling group outside the unit.
•
When water begins to leak out of the terminal air vent valves, close them and continue filling until the pressure gauge indicates a pressure
•
of 1.5 bars.
The installation should be filled to a pressure of between 1 and 2 bars. It is recommended that this operation be repeated after the unit
has been operating for a number of hours (due to the presence of air bubbles in the system). The pressure of the installation should be
checked regularly and if it drops below 1 bar, the water content should be topped-up. If frequent top-ups are required, check all connections
for leaks.
Before emptying, place the mains switch in the “Off” position.
•
Make sure the filling group valve is closed.
•
Open the drainage valve outside the unit and all the installation and terminal air vent valves.
•
