Carel Compact ROC 140, User Manual

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13
ENG
Function and structure WTS +0300130EN rel. 1.0 - 05.09.2022
4.4 Operating sequence
The feed water (raw water) is pumped through the pre-filter, which guarantees the de-chlorination and a final filter
capacity of 5 µm. This ensures the necessary clarity of the water at the membrane inlet. The feed water pressure must be
at least 2 to 5 bar during normal operation to ensure a correct supply pressure at the pump inlet.
The water then flows through the water inlet solenoid valve SV1 and is then directed by the pressure pump at high
pressure to the membrane(s).
The pressure switch PSHIGH provides a signal when the pressure exceeds 10 bar at the membrane inlet (ROC140 only).
Pure water (permeate) passes through the membrane; the salts solved in the water are retained by the membrane and
drained off (concentrate).
The permeate now flows via the pure water line (scope of delivery) to the expansion vessel or the permeate collecting
tank.
The quality of the permeate leaving the system is controlled by the conductivity sensor (ECPROBout).
The production process stops automatically when the water outlet pressure has reached
4 bar at the pressure switch PSMAX. The pressure in the following circuit is kept constant by the expansion vessel.
If the pressure in the following circuit at the pressure switch PSMIN falls below 2 bar (when the expansion vesel is
empty), the unit starts permeate production again.
If the inlet pressure falls below 0.8 bar, the pressure switch PSLOW gives the corresponding alarm and interrupts
operation.
Notice: The reverse osmosis (R.O.) units of the ROC series should not operate without an expansion vessel or
permeate collecting tank.