Table 2-2 Water quality requirements
Item
Allowed Value
Hydrogen ion
pH: 7–8.5
Conductivity at 20°C (σ
20
)
a
300–1250 μS/cm
Inlet water hardness specifications
b
≤ 100 mg/L
a: If σ
20
is less than 300 μS/cm, it takes a longer time for the humidifier to
generate vapor for the first time. If σ
20
is greater than 1250 μS/cm, the
humidifier service life is affected.
b: If the water hardness exceeds 100 mg/L (CaCO
3
), a water softener should be
installed.
NO TE
● It is recommended that water quality be tested by local professionals.
● Anti-freezing measures must be applied for pipes in low-temperature areas.
2.5.2 Drainage Requirements
●
Condensate drain outlets and humidifier drain outlets are available at the
ends of pre-fab. modules.
●
Drainpipes must be able to withstand a temperature above 105°C; otherwise,
pipe deformation may occur.
●
Drainpipes near the pre-fab. module drainage port must be able to withstand
a temperature above 200°C; otherwise, pipe deformation may occur.
●
The pre-fab. module must be located in an area with proper drainage. To
prevent ponding which may affect equipment operation, deploy drainage
channels before constructing a concrete foundation.
●
Dispose of drainage water in accordance with local laws and regulations.
●
Anti-freezing measures must be applied for pipes in low-temperature areas.
2.5.3 Pipe Anti-freezing
Condensate drainpipes of air conditioners and water refill pipes of humidifiers may
freeze and thereby be blocked or crack in low-temperature areas. Anti-freezing
measures must be taken for the pipes.
Wrap the pipes with an electric heating belt, starting from the water refill and
drainage ports on a pre-fab. module to the frozen soil layer. Bury the remaining
pipes underground (the temperature at a specific depth underground is always
above 0°C).
FusionDC1000A Prefabricated All-in-One Data
Center
Installation Guide (IT Scenario)
2 Site Requirements
Issue 01 (2021-04-20)
Copyright © Huawei Technologies Co., Ltd.
20
