12
2551988C
Filling the primary circuit
Please take care when filling the ModuSat® unit.
Make sure that the by-pass valve is
in closed position
Slowly open the isolation valves on
the primary circuit.
Visually check that there are no
leaks. Tighten the connections of
the valve kit if necessary.
If there is a leak internal to the unit,
ensure the isolation valves are left
in a closed position.
First fill of apartment heating or cooling system
The ModuSat unit is fitted with a manometer gauge that is mounted in the front panel. This gauge
reading should be used when filling the secondary circuit.
An external filling loop should be used for filling the secondary
circuit with the mains water.
Open the isolation valves slowly when filling the system.
Cold fill should be done to about 1.5 bar in a single story
dwelling. The pressure required will depend on the head of
the system (difference between the lowest and highest point).
Once the required pressure is reached, close the filling loop
ball valve, vent the system and repeat it again.
