ARTC-SVX001B-EN
19
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. The following figure provides a
recommended installation of components.
Figure 5. Recommended chiller piping
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
to determine 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.
N
No
otte
e:: 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
IIm
mp
po
orrtta
an
ntt:: 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 primary module first. Each secondary module has
the same installation procedure as the previous
module.
