Installing the liquid line filter-drier
About this task:
You must install an R-454B bi-flow liquid-line filter drier external to the outdoor unit. The indoor
unit must be in place before you install the field-supplied R-454B liquid-line filter drier.
NOTICE
Using a larger than specified line size could result in oil return problems. Using too small a line results
in loss of capacity and other problems caused by insufficient refrigerant flow. Horizontal refrigerant
vapor lines between the indoor unit and the outdoor unit must slope towards the outdoor unit at
approximately 1/8 in/ft to facilitate sufficient oil return.
To install the liquid-line filter drier, do the following:
1. Find a suitable location on the liquid line near the indoor unit.
2. Install the liquid-line filter drier in accordance with the installation instructions for the liquid-
line filter drier.
25Installation Manual: R-454B Outdoor Split-System Air Conditioner
Johnson Controls Ducted Systems
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