HP Performance Optimized Data Center (POD) 20cp manual Drainage, Chilled water supply

•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
pH	8.0–10
Specific conductance at 25ºC (77ºF)	10–2500 µmhos
Alkalinity ("M" as CaCO3)	150–1000 ppm
Sulfur (SO4)	0–150 ppm
Chloride (Cl)	0–100 ppm
Hardness (CaCO3)	0–350 ppm

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