Galletti LCA Series Installation, Use And Maintenance Manual page 11

LCA
A standard feature of LCA units is a device for controlling the flow rate (flow switch or
differential pressure switch) in the water circuit in the immediate vicinity of the
evaporator. Frame 3, 4, 5 units include a blade-type flow switch positioned in the
ventilation compartment.
Any tampering with said device will immediately invalidate the warranty.
It is advisable to install a metal mesh filter on the inlet water pipe.
It is strongly recommended to install a safety valve in the water circuit. In the event of
serious equipment faults (e.g. fire) it will enable water to be drained from the system,
thereby preventing possible bursts. Always connect the drain outlet to a pipe with a
diameter at least as large as that of the valve opening and direct it toward an area
where the discharge of water cannot harm people. This is a standard feature of units
equipped with the optional storage reservoir.
Warning: When making the plumbing connections, make sure there are no open flames
in proximity to or inside the unit.
SAFETY VALVE DRAIN PIPES
Safety valves are fitted in each refrigerant circuit: some regulations provide that the refrigerant drained
from the valves be conveyed to the outside by means of a suitable pipe with a diameter at least
matching that of the valve drainage outlet; the valve must not be made to bear the weight of the pipe.
The valves positioned on the compressor outlet only discharge hot saturated gas; those on the liquid
receivers, despite being positioned in the top part of the latter, may discharge saturated liquid and pose a
greater hazard of burns due to the strong dehydrating effect caused by the sudden evaporation of
refrigerant fluid in contact with bodies having a T > -41 °C.
Warning: Always direct the drain pipe toward an area where the discharge cannot harm
people.
RG66000986 – Rev.00 11