HP 20cp Quick Start Guide download pdf (Page 13)

Site requirements 13

• Do not treat the water with softeners. Softeners can produce foam, which affects the operation of the

unit.

• Do not use well water, industrial water, water from cooling circuits, or water contaminated by any

chemicals or bacteria.

• Do not add potential irritants to the water, such as disinfectants or anti-corrosive compounds.

• The manufacturer recommends installing an in-line filter for the water supply. It is your responsibility to

determine if a filter should be installed, and if so, its location. The filter cannot be installed inside the HP

POD 20c and must be compatible with the type of humidifier that is installed.

For more information, see the Operations and Maintenance Manual or the HP Performance Optimized

Datacenter 20c Maintenance and Service Guide.

Drainage

Requirement Location Specification

Condensate drains

Hot aisle side (2) 3.18 cm (1.25 in) drain line and 26.5 lpm (7 gpm) max

Chill Water Header drains

Cold aisle side (2) 3.18 cm (1.25 in) drain line and 26.5 lpm (7 gpm) max

Humidifier drain

Cold aisle side (1) 3.18 cm (1.25 in) drain line and 26.5 lpm (7 gpm) max

Chilled water supply

The following are the water quality requirements and specifications:

• Closed-loop water must not contain any lime scale deposits or loose debris.

• The temperature of the chilled water supplied to the HP POD 20c must be 12ºC to 24ºC (55ºF to 75ºF).

CAUTION: Freezing water can cause a blockage and damage to the unit. In outside locations

that are subject to freezing temperatures, an additive such as glycol might be necessary to lower

the freezing point. However, since the heat transfer potential of water with glycol is lower, the HP

POD 20c must be de-rated accordingly.

IMPORTANT: The chilled water system piping and heat exchangers must be drained completely,

and then purged using compressed air when storing or transporting at or below freezing

temperatures.

IMPORTANT: Operating the chilled water system at the higher end of the acceptable range

decreases the overall thermal capacity of the POD.

Acceptable water quality specifications

Water must be maintained per the following acceptable water quality standards.

Parameter Range

8.0–10

Specific conductance at 25ºC (77ºF)

10–2500 µmhos

Alkalinity ("M" as CaCO

)

150–1000 ppm

Sulfur (SO

)

0–150 ppm

Chloride (Cl)

0–100 ppm

Hardness (CaCO

)

0–350 ppm

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HP 20cp Quick Start Guide Page 13

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