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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 fluid inside the pipes.
It is recommended that a minimum of a 30-mesh strainer
be installed upstream from the chiller system in the
Figure 6. 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 40 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.
Fill with Water/Glycol Solution
The installing contractor is responsible for charging glycol
into the chiller hydronic system.
ARTC-SVX008A-EN
customer supply inlet piping to prevent fouling of the
brazed-plate evaporators. Each chiller evaporator supply
piping contains a factory-installed 40-mesh strainer as
standard for increased filtration and protection against
fouling. The following figure provides a recommended
installation of components.
1. Mix the concentrate of propylene glycol in a tank or
drum for transfer into the chiller. Use
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.
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.
Table 11, p. 46
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21
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