Wine Guardian Ducted Split Wine Cellar Cooling Systems (WGS175) - Manual - Manual (Page 35)

37
Installing the Condensing Unit

Condensing units are factory assembled with a sheet metal outdoor hood for protection
from the elements.

A minimum of 30cm is required around the perimeter of the condensing unit for proper
airflow across the coil, and to provide an adequate discharge airflow path through the
louver section. Any obstructions to this airflow will result in a decrease in
performance, and possibly premature failure due to a buildup of high pressure within
the system.

The condensing unit is designed to operate in ambient temperatures ranging from-17
degrees C to 46 degrees C, as it is supplied with many standard features to assist full
operation in this wide range.

Mount the condensing unit above normal snowfall levels, so as to allow uninhibited
winter operation. A build up of snow or any obstruction to airflow will result in a
decrease in performance and possible premature failure due to an increasingly high
pressure within the system.
Installation of Interconnecting Refrigerant Lines (Suction and Liquid)
NOTE: The interconnecting copper refrigerant lines shall be supplied by the
installer. The larger suction line must be fully insulated along its complete length
from condensing unit to fan coil unit. There is a factory-installed liquid line filter-
drier inside the condensing unit; therefore no additional drier is needed for proper
operation. A liquid line moisture/sight glass is factory installed in the condensing
unit to assist in monitoring the refrigerant charge, and the state of the refrigerant in
the system.

Keep horizontal and vertical distances between the indoor and outdoor section as close
as possible to minimize refrigerant charge required. This will reduce system issues
related to oil management that can impair performance and jeopardize the
compressor’s lubrication.

Provide a one-inch pitch in suction and liquid line toward the evaporator for every 3
meters of run to prevent any refrigerant that condenses in the suction line from flowing
to the compressor when the unit is off. These two lines can be routed together and
wrapped together, as long as the suction line is fully insulated as previously directed.

Suction line riser traps are not required if the riser is properly sized to maintain
refrigerant velocity. Adding a trap will only increase pressure drop.

Prevent dips, sags, or other low spots that will trap refrigerant oil, which is an issue
especially with long horizontal runs. Use hard refrigerant copper for longer horizontal
runs to prevent potential oil return problems. (see sample piping chart on page 34)