Part Name Part #
Quantity
Required
per Unit
Fiber Washers 310741P1 2
Condensate Hose Adapter 080090620 1
Spring Nuts 000782699 16
Diamond Nuts 000770869 7
Grounding Wire
000797999 1
000798169 1
Accessories
Flexible Hose Kit 310530G1 1
Table 8.2 Replacement parts an accessories (continued)
8.1 Water Quality
To safeguard the maximum lifetime of air/water heat exchangers, the water used for chilling purposes
must meet the VGB Chilled Water Guidelines (VGB-R 455 P). The chilled water used must be soft enough
to prevent deposits, but it must not be too soft because that would lead to corrosion of the heat
exchanger.
The following table lists the most important impurities and measures for their removal.
Water Impurity or Condition Corrective Method
Particles (dp < 0.3 mm) Filter the water
Excessive hardness Soften the water by ion exchange
Moderate level of particles and hardeners Add dispersion or stabilization agents
Moderate level of chemical impurities Add deadening agents and inhibitors
Biological impurities (bacteria and algae) Add biocides
Table 8.3 Water Impurity
Vertiv™ recommends treating water to it get as closest as possible to the values in 8 on the previous page
Hydrological Data
Recommended
Purity Levels
pH values (7 - 10,5)
Carbonate hardness (3 - 8) °dH
Free carbon dioxide (8 - 15) mg/dm3
Combined carbon dioxide
8 - 15mg/dm
3
Aggressive carbon dioxide
0mg/dm
3
Sulfides
< 10mg/dm
3
Oxygen
< 50mg/dm
3
Chloride ions
< 250mg/dm
3
Table 8.4 Hydrological data
Vertiv | Liebert® DCD™ User Manual | 50
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