Danfoss iSave 21, Руководство пользователя

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User manual iSave 21
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180R9221 / 521B1174 / DKCFN.PS.003.A1.02
For more information on the importance of proper filtration, please consult our publication
“Filtration”, which also will provide you with an explanation of filtration definitions and guid-
ance on how to select the right filter. See section 5.8.1 for filter installation instructions.
5.8.2 Air bubbles
Large bubbles in a pressurised RO system can result in damage to piping and equipment. All
air must be bleed from both the LP and HP before the RO system is pressurised.
Special consideration should also be given to air bubbles in feed flow, continuously fed into
the HP pump and iSave.
5.8.3 Chemicals
The iSave should not be exposed to chemicals that will damage the RO membranes.
5.9 Initial start up and flushing
Prior to the initial start-up, all piping associated with the iSave unit should be thoroughly
flushed to assure that no impurities enter the iSave. Inadequate pre-flushing will strongly
affect the life of the iSave and may lead to its eventual breakdown.
It is recommended to disconnect all connections to the iSave and to thoroughly flush the
piping before the iSave is connected to the inlet and outlet connections.
It is essential that the water used for the final pre-flush is pre-filtered to a level described
in chapter 5.8
It is recommended to install temporary basket strainers at both inlets to the iSave during
the initial start-up and commissioning.
Also see “Instruction for start and stop of the SWRO with iSave unit” in appendix 10.1.
5.10 Initial start-up and settings of safety equipment
The high-pressure pump feed water into the high pressure line may be able to generate a
pressure higher than the maximum allowable pressure in the system. There is thus a risk of
personal injury and/or damage to the iSave.
Depending of the type and size of the feed pump of the RO system, this pump may be able
to generate a pressure higher than the maximum allowable pressure in the LP system. There
is thus a risk that the iSave or the LP equipment could be damaged by over-pressurisation.
To prevent such over-pressurisation, appropriate relief valves should be used and proce-
dures should be implemented to safeguard the HP and LP sides of the iSave and/or the RO
system.