RG66001652_REV.02
16
LCW - LCR
A
standard
feature of LCW 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.
Any tampering with said device will immediately invalidate the warranty.
It is
OBLIGATORY
to install a metal mesh filter on the inlet water pipe.
Warning: When making the plumbing connections. make sure there are no open flames
in proximity to or inside the unit.
INSTRUCTIONS FOR THE FILLING UP OF THE TANK
The tank is not planned to resist to a depression greater than -0,15 Bar, so pay
attention to the fact that the suction pressure of the pump, where the expansion
tank is positioned, has to be always greater than 0,5 Bar with the pump in
operation: this fact also contributes to reduce any risks concerning the cavitation
of the pump.
It is of fundamental importance for the installer to follow and check the instructions written below
stepwise, so as to avoid every kind of risks concerning the implosion of the tank or the cavitation of the
pump:
a) Empty the expansion tank until the pressure is 0,5 Bar
b) Charge the system and pressurize it until about + 1 Bar in suction, pump side (with pump not
working)
c) Allow air to escape from the system
d) Check the suction pressure of the pump (about 1 Bar) and start the system
Stop the pump after 15-30 minutes and repeat from point c) until you don’t hear noises, caused by air still
present in the system, anymore.
General guidelines for Cooling connections of LCR units
LCR units are supplied pre-charged with inert nitrogen gas at a pressure of 3 bars to protect them from
the penetration of humidity and are provided with threaded Rotalock weld-on connections (3 pieces) for
outdoor piping.
Rotalock
Connection
Braze-welded copper
connection
Piping made on site
