14 VERTIV™ - Liebert
®
EFC - UM - 10040805MAN_ENG - 30.03.2023
To grant proper equipment operation, water treatment might be required and it is recommended to contact a local water treatment expert.
For proper operation of Liebert
®
EFC
with Vertiv™ factory.
table 3.1 to
grant a recirculating water quality as per table 3.2. Feed water and make-up water are intended to be the water at the unit water ingress.
The preferred water origin for EFC feed water and make-up water is municipal water main supply. If deep wells, river, lake and raining water
table 3.1 and grant a recirculating
water quality as per table 3.2 and to control microbiological growth to avoid risks for health and safety. If reclaimed water is used, in
unit. Sea water is not permitted. Feed water shall be free from any type of organic solvent, detergent and surfactant.
An adequate water treatment program on feed water and make-up water should be evaluated and eventually implemented, considering
microbiological growth must be evaluated and eventually implemented to avoid any additional risk for health and safety in compliance
with local requirements/legislation. In case value of Puckorius Scaling Index (PSI) calculated for recirculating water (see Table 3.2) is
lower than 6, dosage of an anti-scalant is strongly recommended to avoid excessive scaling. In case value of Puckorius Scaling Index
(PSI) calculated for recirculating water (see Table 3.2) is higher than 6.5, dosage of an anti-corrosive is strongly recommended to avoid
metal corrosion.
water treatment for corrosion should consider anticorrosives approved from Vertiv™. Wetted materials list includes:
• PVC
• AISI304 stainless steel
• painted galvalume and painted aluzinc
• galvanized mild steel
If softened water or reverse osmosis is used, consider 5°f (50 mg/l CaCO
3
; 50 ppm CaCO
3
) as minimum value for total hardness. When
a reverse osmosis is used, water becomes aggressive. Partial mixing with raw water is highly recommended to ensure a minimum water
conductivity of 100 microS/cm and a minimum water hardness of 50 mg/l CaCO
3
. Because of this, pipes or components made from copper
or copper alloys (brass, bronze, etc) must not be used on the feed water line due to the increased risk of corrosion.
during unit operation the recirculating water must have all characteristics listed in the below table 3.2.
pH 6 - 8.5 dimensionless
100-1000 microS/cm
Filtration rating
<150
Total hardness, as CaCO 50-250 mg/l
Chloride <200 mg/l
Sulphate <200 mg/l
Chlorine <1 mg/l
Silica
<25 mg/l
Water shall not represent a health and/or safety risk in compliance
with local requirements/legislation
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