System Engineering
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SYSTEM ENGINEERING
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Table 24: Pipe Segment Sizing— All pipe dimensions are inches OD
Model
Main Pipe Segment
1
Branch and Run-Out Segments
2,3
< 295 feet equivalent ≥ 295 feet equivalent ≤ 19.1 MBh
downstream capacity
> 19.1 MBh < 54.6 MBh
downstream capacity
≥ 54.6 MBh ≤ 68.9 MBh
downstream capacity
Liquid Vapor Liquid Vapor Liquid Vapor Liquid Vapor Liquid Vapor
ARUN036GS2
3/8 5/8 3/8 3/4 1/4 1/2 3/8 5/8 – –
ARUN047GS2
3/8 5/8 3/8 3/4 1/4 1/2 3/8 5/8 – –
ARUN053GS2
3/8 3/4 3/8 3/4 3/8 3/4 3/8 3/4 3/8 3/4
1. Select the equivalent length of the longest pipe run between the outdoor unit and the furthest indoor unit.
2. Capacity (MBh) = The sum of the nominal capacity of all connected indoor units served by the pipe segment.
3. If the sum of the
nominal cooling capacity of all connected indoor units served by a branch or run-out segment is greater than the capacity of the outdoor unit, size the pipe segment based on the
outdoor unit
nominal capacity.
PIPE LAYOUT PROCEDURE
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