Gree DC Inverter Multi VRF User Manual

DC INVERTER MULTI VRF INSTALLATION
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5 INSTALLATION REQUIREMENTS OF REFRIGERANT PIPING
5.1 Specification of refrigerant pipe
R410a refrigerant system
External
Diameter(mm/inch)
Thickness(mm)
External
Diameter(mm/inch)
Thickness(mm)
φ6.35 ≥0.8 φ22.2 ≥1.5
φ9.52 ≥0.8 φ25.4 ≥1.5
φ12.7 ≥1 φ28.6 ≥1.5
φ15.9 ≥1 φ34.9 ≥1.5
φ19.05 ≥1
5.2 Allowable Length and Height Differences of the Refrigerant Piping between the Indoor and Outdoor
Units
Allowable Value
100,120,140,160
Pipe
Total Length (Actual Length) of Pipes 150m L
1
+L
2
+L
3
+a+b++c+d
Actual Length 70m
Length of farthest pipe (m)
Equivalent Length 80m
L
1
+L
2
+L
3
+d
Length of pipe from the 1
st
manifold to the farthest indoor unit 25m L
2
+L
3
+d
Outdoor unit on upper 30m ——
Height difference between
indoor unit and outdoor unit
Outdoor unit at lower 25m ——
Height difference between indoor unit and outdoor unit 10m ——
5.3 Size of Connection Pipe
5.3.1 The size of the pipe (main pipe) from the outdoor unit to the 1
st
manifold is same as the size
of outdoor pipe.
Size of Outdoor Pipe
Model
Item
GMV(L)-Pd100
W/NaB-K
GMV(L)-Pd120
W/NaB-K
GMV(L)-Pd140
W/NaB-K
GMV(L)-Pd160
W/NaB-K
Liquid
pipe
mm φ9.52 φ9.52 φ9.52 φ9.52
Air pipe mm φ15.9 φ15.9 φ15.9 φ19.05
Connection
Pipe
Connection
mode
Flared connection
Note: If the equivalent length of total t pipe exceeds 90m, the fitting pipe on gas side and liquid
side shall be increased of one dimension.
5.3.2 The size of the pipe (branch pipe) between the manifolds is selected according to the
capacity of downstream indoor unit to be connected (See Table below). If exceeding the capacity
of outdoor unit, the capacity of outdoor unit will prevail.If exceeding the capacity of outdoor unit,
the capacity of outdoor unit will prevail.
Total capacity of indoor units Air pipe Liquid pipe
C≤50 φ12.7 φ6.35
50<C≤140 φ15.9 φ9.52

Gree DC Inverter Multi VRF Specifications

General

Brand	Gree
Model	DC Inverter Multi VRF
Category	Air Conditioner
Language	English