Air PreciseAIR PCA Series, Инструкция по установке, эксплуатации и обслуживанию

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IOM-PreciseAIR
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Provide a minimum 12” of straight duct on the discharge outlets.
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Provide an access door at each backdraft damper (in discharge outlet) for future
maintenance.
2.8. Condenser Water or Chilled Water Piping
All piping connecting to the unit must be aligned and supported as to not impart stress on the unit
connections.
The required field installed water pipe sizes may or may not be the same as the connection sizes
at the unit. This will depend on the length of the pipe and the calculated pressure drop of
peripheral components.
Water connections on the unit are dimensioned and labeled on the unit’s mechanical submittal
and labeled on the unit itself.
The Customer should provide isolation valves for the condenser water lines should be installed
upstream and downstream of the heat exchangers, located to also provide practical service
isolation for flow sensing devices, field thermometers, flexible connectors, and any removable
pipe spools.
Air vents must be installed in various locations in the piping system to purge the air and avoid
problems due to the presence of air in the water loop.
If the unit will remain operational at subfreezing ambient temperatures, the water system must
be protected from freezing, by one of the following measures:
1. Insulate or install heat tape on the unit heat exchanger, water piping, pumps, and other
components to protect from freezing in low ambient temperatures. Heat tape must be
designed for low ambient temperature applications. Heat tape selection should be based
on the lowest expected ambient temperature.
2. Add a non-freezing, low temperature, corrosion inhibiting, heat transfer fluid to the
chilled water system. The solution must be strong enough to provide protection against
ice formation at the lowest anticipated ambient temperature.
NOTE: Use of glycol type antifreeze reduces the cooling capacity of the unit and must be considered
in the design of the system specifications.
2.9. Piping Hook-up Components
Piping components include all devices and controls used to provide proper water system operation
and unit safety. These components Include the following:
Entering Water Piping
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Isolation valve (located upstream from all components listed below).