Multizone Wall Mounted Air Handler Installation Manual
6
Refrigerant Piping Connection
Note on Pipe Length
Maximum Length and Drop Height of Refrigerant Piping per Unit Model
Connection Instructions – Refrigerant Piping
The length of refrigerant piping will aect the performance and energy eciency of the unit. Nominal
eciency is tested on units with a pipe length of 16.5ft. In North America, standard pipe length is 25’.
A minimum pipe run of 10 feet is required to minimize vibration & excessive noise. Refer to the table
below for specications on the maximum length and drop height of piping.
Step 1: Cut pipes
When preparing refrigerant pipes, take extra care to cut and are them properly. This will ensure
ecient operation and minimize the need for future maintenance.
1. Measure the distance between the indoor and outdoor units.
Refrigerant Piping
Connection
Page 20
Revised 5/14/2020
Model
Max Length Max Drop Height
Add'l Refrigerant
9k & 12k 82 feet 33 feet 0.16/ foot
18k 99 feet 66 feet 0.16/ foot
24k 164 feet 82 feet 0.32/ foot