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19
Connection Pipe Requirement
The maximum length of the connection pipe is listed in the table below.
Do not place the units between which make the distance exceed the maximum length of the connection pipe.
Model
Size of Fitting
Pipe(Inch)
Max. Pipe
Length
(ft)
Max. Height
Difference between
Indoor Unit and
Outdoor Unit (ft)
Drainage Pipe
(Outer Diameter ×
wall thickness)
(mm)
Liquid
Gas
VRFI-12EC4-D2B(55)5
1/4
3/8
65.6
49
Φ25×1.5
VRFI-18EC4-D2B(55)5
1/4
1/2
65.6
49
VRFI-24EC4-D2B(55)5
3/8
5/8
98.4
49
The connection pipe should be insulated with proper water-proof insulating material.
The pipe wall thickness should be 0.5-1.0mm and the pipe wall should be able to withstand the pressure of 6.0 MPa.
The longer the connecting pipe, the lower the cooling and heating performance.
Electrical Requirements
Electric Wire Size and Fuse Capacity.
Indoor Units
Power Supply
Fuse Capacity
Min. Power Supply Cord
V/Ph/Hz
A
mm2
12~24k
208-230V~ 60Hz
5
AWG 18
Notes:
1. The fuse is located on the main board.
2. Install the disconnect device with a contact gap of at least 3 mm in all poles near the units (both indoor unit and
outdoor units).The appliance must be positioned so that the plug is accessible.
3. The Specifications of the power cable listed in the table above are determined based on the maximum power
(maximum amps) of the unit.
4. The specifications of the power cable listed in the table above are applied to the conduit-guarded multi-wire
copper cable (like, YJV copper cable, consisting of PE insulated wires and a PVC cable jacket) used at
104
°F
(
40°С) and resistible to
194
°F (
90°С) (see IEC 60364-5-52). If the working condition changes, they should be
modified according to the related national standard.