REFNET Piping Si30-408
18 Introduction
5.1.2 For RX(Y)(Q) ~ M
Allowable Length of Refrigerant Piping (Actual Length)
Allowable Level Difference
Notes: 1. Be sure to use REFNET piping materials for piping branch part.
2. Do not make branch part after branching with REFNET header.
H1
H3
H2
c
a
Outdoor unit 1
Outdoor unit 2
Indoor units
Indoor units
Indoor units
#1 refrigerant branch kit
Outdoor branch kit
b
REFNET header
Outdoor branch to Outdoor
unit [a]
#1 branch kit to idoor unit [c] Outdoor branch to Indoor unit [b + c]
Allowable length (m) 10m or less 40m or less 150m or less
Between outdoor unit and indoor unit [H
1]
Between indoor
units [H
2]
Between outdoor units [H
3]
Allowable level
difference (m)
50m or less
If outdoor unit is located lower than indoor unit: 40m or less
15m or less 5m or less
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