Si30-408 REFNET Piping
Introduction 17
5. REFNET Piping
5.1 Allowable Length of Refrigerant Piping
5.1.1 For RSXY(P) ~ KA(L)
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.
Outdoor unit (master) to
Outdoor unit (slave) [a]
#1 branch kit to Indoor unit [c] Outdoor unit to Indoor unit (b + c)
Allowable length (m) 5m or less 40m or less 120m or less
Between outdoor unit and indoor unit [H
1]
Between indoor
units [H
2]
Between outdoor units
(master and slave units) [H3]
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
H1
H3
H2
c
b
a
Outdoor unit (Master unit)
Outdoor unit (Slave unit)
Indoor units
Indoor units
Indoor units
#1 refrigerant branch kit
REFNET header
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