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ARTC-SVX002A-EN
Installation Piping
Install Piping and External
Components
Proper support of piping and pipe hangers must consider
the weight of the piping as well as the water weight inside
the pipes. A 40-mesh screen strainer must be installed in
each water/liquid system piping inlet for proper filtration
an protection of the heat exchangers. Below figure
provides a recommended installation of components.
Initial Flushing of Piping
After installation of system piping and before connection
to the chiller system, it is important to clean and remove
debris, weld slag, and other contamination deposited
during fabrication of the piping system. Typical flushing
includes hot water with mild detergent followed by a dilute
phosphoric acid solution until all visible residue is
removed.
Only cleaning liquids, acids, and detergents compatible
with SAE Grade 316 stainless steel, copper, and carbon
steel should be used. Consult a professional water
treatment specialist when in doubt.
Flushing should take place across a filter/strainer with a
maximum 30 mesh screen and continue for a minimum of
six hours with frequent removal of the screen to capture
residue or until the strainer is clean.
After detergent and chemical cleaning, flush the water
piping with fresh water for one hour to remove any
remaining cleaning compounds.
ID10 needs to be verified with CPCO controller.
Fill with Water/Glycol Solution
The installing contractor is responsible for charging glycol
into the chiller hydronic system.
1. Mix the concentrate of propylene glycol in a tank or
drum for transfer into the chiller. Use
Glycol Performance Impact Factors to assist in
determining the appropriate glycol concentration for
the chiller.
2. Mix the glycol and water externally before filling the
chiller to prevent clogging of the chiller piping with a
heavy concentrate.
3. For chiller system with tank and pump module and
sealed buffer tank, fill the chiller using the manual fill
port on the cabinet. Fill so that the mixture reaches near
the top. Stop every so often so the fill level can be
monitored.
Note:
Do not use the glycol feeder pump to fill the
chiller loop. It is not designed for continuous
use and will fail.
Only after the above steps have been completed should
the water piping be connected to the chiller system.
Dowfrost
Important:
Dowfrost inhibited propylene glycol-based
solution is listed as chemically acceptable
by the US Department of Agriculture
(USDA). The two ingredients in Dowfrost
water/glycol mixture are generally
recognized by the FDA as safe food
additives under Parts 182 and 184 of the
Food Additive Regulations.
Connecting Module Couplings
Install each module according to its position number
indicated on its electrical distribution cabinet. Install the
client module first. Each server module has the same
installation procedure as the previous module.
Note:
The below instruction is typically for water cooled.
1. Remove the coupling that attaches the headers to the
heat exchangers in order to position the header with
the next module and attach the header coupling.
2. Remove all four small couplings to allow the main
headers to slide into the previous module.
Figure 5.
Recommended chiller piping
