Carrier 38AUM Series Installation, Operation & Maintenance Manual page 12

40RUM
Cooling Stage
Arrangement
Y1
Vertical
Y2
Y1
Horizontal
Y2
Install Filter Drier(s) and Moisture Indicator(s)
Every unit MUST have a filter drier in the liquid line. 38AUMD models require two filter driers (one in each liquid line).
Locate the filter drier(s) at the indoor unit, close to the evaporator coil's thermal expansion valve (TXV) inlets.
Installation of liquid line moisture indicating sightglass in each circuit is recommended. Locate the sightglass(es)
between the outlet of the filter drier and the TXV inlet. In some applications, depending on space and convenience
requirements, it may be desirable to install 2 filter driers and sight glasses in a single circuit application. One filter drier
and sight glass may be installed at A locations
Select the filter drier for maximum unit capacity and minimum pressure drop. Complete the refrigerant piping from the
indoor unit to the outdoor unit before opening the liquid and suction lines at the outdoor unit.
Fig: - Location of Sight Glass(es) and Filter Driers Typical 38AUMZ Systems
40RUM Coil
Segment
2
1
1
2
Fig: - Typical Evaporator Coil Connections (40RUM)
Connect to 38AUMD
Circuit 1
Circuit 2
Circuit 1
Circuit 2
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