ELGA
CENTRA – MDS/LDS/RDS US Operator Manual
CENTRA – MDS/LDS/RDS US Version 01 – 08/14
Page 5
WARNING: Any cylinders or additional equipment
installed (filters etc.) including ring-main
pipework, must be rated to the operating
pressure of the CENTRA system (6 bar
maximum).
•
The purified water is then passed through the UV (UV1)
chamber where it is exposed to intense UV radiation to
provide continuous bacterial control and to promote the
cleavage of organic molecules before passing through an
absolute 0.2µm bacterial and particulate filter. The
pressure drop across the filter can be monitored to
ensure optimum performance is maintained (PG1 and
PG2).
•
Finally the purified water passes through a:
•
Temperature sensor (TS2).
•
Water quality sensor (QS2), which measures the
resistivity of the water.
•
Flow sensor (FS1) which electronically measures flow
around the system.
•
Air is drawn into the reservoir when water is used. To
maintain water purity it is necessary to filter the air. Air-
borne particles and bacteria are removed by an air-filter.
Alternatively an improved level of water purity can be
maintained within the recirculation system using a
composite vent filter, which also removes air-borne
contaminants such as volatile organic compounds and
carbon dioxide.
•
The
CENTRA – RDS US
includes the ability to drain the
reservoir completely via V4 and sanitize the installation
semi-automatically via V8 to ensure that bacterial levels
within the installation are kept to a minimum.
CENTRA – RDS HFV/HFR US
•
Feed water enters through a control valve (V1), which in
combination with the level sensor (LS1) controls the
volume of water in the 350 liter (92USG) reservoir.
•
The feed water passes through a:
•
Water quality sensor (QS1), which measures the
conductivity of the water.
•
Temperature sensor (TS1).
•
ELGA systems providing the purified water will be
controlled and monitored by the
CENTRA – RDS
HF/HFV/HFR US
to maintain a sufficient level of water
within the reservoir.
•
The pump (P1) distributes the pre-purified water around
the installation at pressure, controlled via the pressure-
regulating valve (PSV1) and monitored with a pressure
sensor (PS1).
•
Products fitted with a variable speed recirculation pump
(P2) use feedback from a pressure transducer (PT1) to
regulate the pump output to maintain a constant outlet
pressure (typically 4 bar). This also reduces the outlet
flow when water is not being taken from the recirculation
loop.
