Piping
• Comply with local codes for proper piping.
• Use type L copper piping and non-ferrous materials. Do not use black steel piping.
• Insulate piping to minimize condensation.
• Terminate the beginning and ends of hard runs with vibration isolators.
• Ensure piping is clean and free of flux at solder joints.
• Install manual ball valves at high points in the piping for purging air while filling the lines.
o If automatic purge valves are used, isolation ball valves should be installed before the
purge valves.
o Purge valves must be closed during normal operation.
• Install drain valves at the base of every rise for emptying the lines.
• Install a heat trace on piping exposed to temperatures below +20°F (-6.7°C). Cover heat trace
with closed cell UV resistant insulation. Power the heat trace from a dedicated disconnect.
o Heat trace is specified to provide additional protection against freezing in a scenario
where the chiller loses power during extremely cold ambient conditions for an extended
period of time.
• Label supply and return lines over insulation with arrows indicating flow directions.
• Install isolation ball valves on the supply and return connections at the chiller.
• Install flush ports with isolation valves after the supply and return ball valves.
• Sleeve and insulate pipe penetrations through all roof and/or walls.
• Install a loop of reinforced opaque hose between supply and return connections at indoor
location for flushing.
• After the lines are flushed, connect the lines to the application.
Devices that are not recommended: Haskris does not recommend that any of the following are used
in the piping system, without consultation with Haskris.
• Chemical feeder systems
• Expansion tanks
• Electronic regulation or shut off valves
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