Size Requirement For Branch Pipe And Piping - Lennox VERDB01C432P Installation Manual

Cooling and Heating Recovery Mode Exchanger

4.2.7 Size requirement for branch pipe and piping

Take the connection sketch map of single-module system for example.
4.2.7.1 Branch selection of mode exchanger ("A1, A2")
Select branch of mode exchanger as per total capacity of downstream indoor unit(s). Please
refer to the following table.
Model selection for branch " A1、A2" of mode exchanger；
R410A refrigerant system
Y-Type Branch Pipe
4.2.7.2 Connection for single indoor unit with capacity of less than 48500Btu/h
Piping size among downstream branches of mode exchanger "a、h、l"
Total rated capacity of downsteam
indoor units: X (Btu/h)
X≤9500
9500＜X≤17100
17100＜X≤48500
Each branch is to connect to a set of indoor units with the same mode. For the branch does not
connect to indoor unit, make sure that the welding is reliable without leaking of refrigerant.
Branch selection of downstream indoor unit of mode exchanger ("B1、B2、B3")
R410A refrigerant system
Y-type branch
Fig. 4.30
Total capacity of the downstream indoor unit X (Btu/h)
X≤17100
17100＜X≤72000
72000＜X≤96000
96000＜X≤232000
232000＜X≤327500
327500＜X
Piping size among downstream branches of mode exchanger
Gas pipe (mm)
Φ9.52(3/8)
Φ12.7(1/2)
Φ15.9(5/8)
Total rated capacity of downsteam
indoor units: X (Btu/h)
X≤48500
21
Model
VEBCR01A
VEBCR02A
VEBCR03A
VEBCR04A
VEBCR05A
VEBCR06A
Liquid pipe (mm)
Φ6.35(1/4)
Φ6.35(1/4)
Φ9.52(3/8)
Model
VEBCR01A