15VERTIV™ - Liebert
®
EFC - UM - 10040805MAN_ENG - 30.03.2023
pH 6 - 9.5 dimensionless
<3000 microS/cm
Total hardness, as CaCO 50-500 mg/l
Chloride <400 mg/l
Sulphate <400 mg/l
Silica
<100
mg/l
Cycles of concentration <7* dimensionless
Puckorius index 5.5 - 8** dimensionless
Water shall not represent a health and/or safety risk in compliance
with local requirements/legislation
These values are dependent on regular blow down during operation and regular sump purge.
(*) Note that the cycles of concentration is not an independent variable and its value strictly dependent on the ratio between feed water and recirculating
water (total hardness, conductivity, chloride, sulphate, silica). This ratio is managed by blow down operation dened through the “Conductivity threshold”
and “Delta” (Hysteresis) settings. During the evaporation, the water constituents concentration and the water conductivity increase, once it reaches the
threshold, bleed o starts and fresh water is reclaimed with consequent reduction of the water constituents and conductivity.
(**) Mandatory requirement if dosage of anti-scalant or anti-corrosive to manage Puckorius Scaling Index (PSI) has not been performed, instead, if a dosage
has been performed, Puckorius Scaling Index (PSI) is not required to be inside that limits.
At Commissioning
No. 1 Sample
from each main feeding line
-
First month
after Commissioning /
Every days
No. 1 Sample
from each main feeding line
• <20 units / Samples from every 4 units equally distributed
among the working groups, minimum 2 units
• >20 / Every 5 units equally distributed among the working
groups
Thereafter /
Every three months
No. 1 Sample
from each main feeding line
Units working in Teamwork / same loop, servicing the same portion of data room.
Avoid the contact of any part of the EFC with any type of organic solvent and aggressive detergent even if present
in aqueous and/or diluted solution. Use only approved chemicals for descaling, anticorrosion, disinfection and cleaning: not
approved substances could damage the unit components and invalidate the warranty. Contact Vertiv™ Service for approved
It is recommended to check the feeding water quality, and it is mandatory to check the recirculated water quality to ensure the
values match with the requirement listed on table 3.1 / 3.2 and record the values in accordance with the frequency in table 3.3,
conductivity reaching the threshold). If the water treatment provider recommends to analyze the water more frequently, this recommendation
becomes the minimum requirement.
Any Vertiv™ warranty on Liebert
®
EFC
monthly at least.
set point of the recirculating water (set on the unit control). Make sure the feed water analyses are available at least few days
keep chloride or other contents inside the maximum admitted values as shown in table 3.2.
3.2
and the concentration on feed water analysis. The Cycle of Concentration (CoC) to be considered is the minimum between the calculated
ones and 7 (maximum value for CoC as per table 3.2)
10% is the margin considered as the conductivity is slightly less than proportional to the cycles of concentration.
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