Carel Large ROL 160-1K2, User Manual

Page: 32 / 68

32
ENG
Maintenance WTS LARGE +0300131IT rel. 1.0 - 05.09.2022
9. MAINTENANCE
9.1 General
Regular maintenance is essential to ensure that the CAREL units can achieve a long service life. The necessary
maintenance work refers to components that are either subject to mechanical or electrical wear, or whose function is
reduced by deposits.
The optimum function and required maintenance intervals of a reverse osmosis unit depend mainly on the existing
water quality and the permeate quantity produced. Different water qualities can extend or shorten the maintenance
intervals.
The following factors in specific could lead to an early blocking of the membranes:
• Blockage as a result of the deposit of iron or calcium sulphate and calcium carbonate
• Blockage with organic material
In general, a replacement of the membranes becomes necessary if a change in the following basic system parameters
(at the same temperature and salinity) is noticed:
• Reduction of the permeate production to a value which is insufficient for the application downstream of the reverse osmosis
system.
• Too much increase in the conductivity of the water produced to a value too high for the application downstream of the sy-
stem.
• Increase of the membrane feed pressure.
9.2 Safety instructions for maintenance
Caution: Risk of electrical shock!
Hazardous electrical voltage!
Any work on the electrical system to be performed by certified expert staff (electricians or expert personnel with
comparable training) only.
Notice: Take care of ESD protection!
The electronic components of the control are very sensitive to electrostatic discharges. In order to protect these
components during maintenance, steps must be taken to guard against damage from electrostatic discharge.
Notice: Removal and replacement of components
If necessary, the parts of the UO unit may only be replaced by qualified personnel. Replacement work must always be
carried out with the system at a standstill; contact the supplier or the manufacturer directly for this purpose.
Notice: Use disposable gloves when installing the pre-filter(s) and membrane(s) to protect them from
contamination.
9.3 Routine maintenance
9.3.1 Change prefilter
The HygroMatik ROL units are equipped with two different pre-filters.
Fig. 9.a
The CB-EC
carbon filter
(K) is used to reduce the chlorine content in the feed water (L). The presence of chlorine in
the water may irreversibly damage the membrane. The car- bon filter works by chemical reaction, combin- ing and
absorbing the chlorine molecules. Consequently, its performance will decline over time.
J
K
L