Emerson Liebert MC Microchannel Outdoor Condenser 28 - 220kW Manuel D’Utilisation
Piping
Liebert
®
MC
™
28
5.2
Field Piping Guidelines
One discharge line and one liquid line must be field-installed for each circuit of the indoor unit and
the outdoor condenser(s). Dual circuit condensers are available for most dual circuit indoor unit
applications. Refer to Figures 18, through 20 for additional field-installed piping needed at the
condenser. This piping is needed for proper system performance and for installation/interconnecting
receivers and head pressure control valves for Liebert Lee-Temp
™
systems.
NOTE
Keep the evaporator unit and condenser closed with their factory charge of inert gas while all
Keep the evaporator unit and condenser closed with their factory charge of inert gas while all
field piping is installed. Keep the field piping clean and dry during installation, and do not
allow it to stand open to the atmosphere.
When all the field interconnecting piping is in place, vent the condenser’s inert gas charge and
When all the field interconnecting piping is in place, vent the condenser’s inert gas charge and
connect to the field piping. Finally, vent the evaporator unit’s charge of inert gas and make its
piping connection last.
Follow all proper brazing practices, including a dry nitrogen purge to maintain system
Follow all proper brazing practices, including a dry nitrogen purge to maintain system
cleanliness.
The condenser connection pipes must be wrapped with a wet cloth to keep the pressure and
The condenser connection pipes must be wrapped with a wet cloth to keep the pressure and
temperature sensors cool during any brazing.