Gree GKH(12)BA-K3DNA1A/I, Service Manual

Page: 101 / 207

Super Free Match
Service Manual
INSTALLATION 97
6 REFRIGERATION PIPING WORK
6.1 Allowable Length and Drop Height of Connecting Pipe
The sorts The pipes Length （ m ）
Total length between outdoor unit and BU
modules
L1+L2+L3+L4+L5 ≤ 55
GWHD(48S)NM3CO ≤ 80
Total length
between indoor
unit and BU
GWHD(56S)NM3CO
1A+1B+1C+2A+2B+2C+
3A+3B
≤ 90
Between indoor unit and BU module 1A;1B;1C;2A;2B;2C;3A;3B ≤ 15
Maximum
allowable
length
Between indoor unit and the 1st branch
L4+1B;L2+L5+2A;
L2+L3+3B
≤ 40
Between outdoor and indoor units H1 ≤ 30
Between outdoor units and BU H2 ≤ 30
Between BU and BU modules H3 ≤ 15
Maximum
allowable
length
Between indoor and indoor units H4 ≤ 15
Between outdoor and the 1st branch L1 ≥ 5 Minimum
allowable
length
Between BU and the branch L3;L4;L5
as possible
as short
‹ BU module should be placed within the level between the outdoor unit and indoor unit.
6.2 Dimension of Connecting Pipe
Sorts Gas Pipe （ mm ） Liquid Pipe （ mm ）
GWHD(48S)NM3CO Φ 15.9
Outdoor unit
GWHD(56S)NM3CO Φ 19.05
Φ 9.52
Between outdoor unit and the 1st branch The pipe L1 Φ 19.05 Φ 9.52
Between the 1st and the 2nd branch The pipe L2 Φ 15.9 Φ 9.52