InfraSuite - CoolDoor
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3.11 Water Quality Requirements
In order to ensure the long-term and reliable operation of the CoolDoor, water quality control
must be carried out for the piping system of the CoolDoor to prevent small particles from
damaging the O-rings of the components, which can lead to poor sealing, the ball valve
components being unable to be operated due to deposits, or even a decrease in the heat
transfer effect due to the fouling of the inner surface of the coil. Therefore, when the
installation of the pipeline is completed and it is to be connected to the CoolDoor product,
cleaning and flushing must be completed, and the injected water quality must be controlled.
Operations shall be complied with ASHRAE water chemistry requirements from the “Liquid
Cooling Guidelines for Datacom Equipment Centers”, Second Edition, 2014, ISBN 978-1-
936504-67-1, and also the designated ASHRAE-D-90564. Facility water quality index and
chilled facility water system (FWS) circuit requirements are as shown in
Table 3-1
:
(Table 3-1: Water Quality)
In order to ensure the long-term and stable operation of the CoolDoor, use drinking water for
the initial water injection for best results. Delta recommends that the chilled water system be
equipped with a filter to ensure that the filtering reaches <50 microns. Delta CDU can provide
a reliable chilled water system and monitor water quality; it can also provide solutions for the
water quality of the closed chilled water system.
CoolDoor can use water and propylene and water and glycol mixtures as well as water
treatment additives. A qualified water treatment contractor should be consulted to obtain
recommendations and water quality analyses to meet your specific requirements.
For water-saving treatment, you should consult water treatment professionals for testing and
inspection. Chemical treatment of the components and fluid requirements of the closed loop
system are required. Content of all circulating water and supplemental water must be
maintained at the best levels in accordance with industry standards. Maintain proper levels
of pH, alkalinity, chloride, nitrites, and conductivity, as well as other chemicals and metals
that must be tested and monitored in the system. Water quality treatment should be
implemented during the initial system adjustment to provide long-term system reliability. This
test is outside of the scope of this document.
WARNING:
Do not use deionized water (DIW) as it is corrosive to some metals.
