Gree GMV-N07G/A3A-D(U), Service Manual

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Multi Variable Air Conditioners Indoor Unit for North America
98
＞
250
(9 7/8)
＞
600
(2
3 5/8)
＞
200
(7
7/8)
→
The control box must be installed upwards as the
direction of the arrow shown in the figure
wall
ground
wall
wall
wall
＞
250
(9 7/8)
3.12.3 Installation notice
◆
Make sure that the EXV box is installed upwards.
◆
Make sure there is enough free space in front and in the side of the box for future maintenance.
◆
Make sure that the other parts such as electrical box, tie wraps and wires are protected from
direct brazing flames during brazing.
◆
The EXV box is required to be installed in a vertical direction within the range of 90±15° (not
allowed for horizontal work). Welding the connection tubes first before refrigerant pipes in order to avoid
face-down soldering
3.12.4 Selection of air switch and power cord
Model Power Supply
Circuit Breaker
Capacity (A)
Minimum
Sectional Area of
Ground Wire
(mm
2
/AWG)
Minimum
Sectional Area
of Power
Cord
(mm
2
/AWG)
GMV-N12U/A-T(U)
208/230V-1ph-60Hz
15 1.0/AWG18 1.0/AWG18
GMV-N24U/A-T(U) 15 1.0/AWG18 1.0/AWG18
GMV-N48U/A-T(U) 15 1.0/AWG18 1.0/AWG18
GMV-N96U/A-T(U) 15 1.0/AWG18 1.0/AWG18
GMV-N192U/A-T(U) 15 1.0/AWG18 1.0/AWG18
4 Installation of Connection Pipe
①
. Conform to the following principles during pipe connection: Connection pipe should be as short as possible, so is
the height difference between indoor and outdoor units. Keep the number of bends as little as possible. Radius of
curvature should be as large as possible.
②
. Weld the connection pipe between indoor and outdoor units. Please strictly follow the requirements for welding
process. Rosin joint or pin hole is not allowed.
③
. When laying the pipe, be careful not to distort it. Radius of bending parts should be over 200mm (8in.). Note that
pipes cannot be repeatedly bent or stretched; otherwise the material will get harder. Do not bend or stretch the
pipe for more than 3 times at the same position.
4.1 Flaring Process
(1) Use pipe cutter to cut the connection pipe in case it is unshaped.
(2) Keep the pipe downward in case cutting scraps get into the pipe. Clear away the burrs after
cutting.
(3) Remove the flared nut connecting indoor connection pipe and outdoor unit. Then use flaring tool
to fix the flared nut into the pipe (as shown in Fig.4.1).
(4) Check if the flared part is flaring evenly and if there is any crack.
Fig. 4.1