Pipeline Installation And Insulation - Gree GMV-224WM/G-X Owner's Manual

(6) Select the branch "①" of outdoor module.
Total capacity of upstream module Q(kW)
(7) Select the manifold "②" at indoor side.
Manifold at indoor unit side can be selected as per total capacity of downstream indoor unit(s).
Refer to the following table.
R410A Refrigerant System
Y-type Manifold
T-type Manifold

3.4 Pipeline Installation and Insulation

3.4.1 Pipeline Installation of Refrigeration System
(1) Before welding the pipeline sealing cap, please make sure there's no refrigerant in pipeline.
If welding it directly, it may cause unnecessary property damage or personal injury.
(2) Conform to the following principles during pipe connection: Connection pipeline should be as
short as possible. The height difference between indoor and outdoor units should be as short
as possible. Keep number of bends as little as possible. The radius of curvature should be
as large as possible.
(3) Weld the connection pipes between indoor and outdoor unit. Please strictly conform to the
requirements for welding process. Rosin joints and pin holes are not allowable.
(4) When laying the pipes, be careful not to deform them. The radius of bending parts should be
more than 200mm. The pipes can't be repeatedly bent or stretched, otherwise the material
will get harden. Do not bend or stretch the pipe over three times at the same position.
(5) Please use a torque wrench to connect union nut on the indoor unit. See the Fig.3.4.1 as
below.
Q≤186
Q>186
Total capacity of downstream indoor
unit(s) X(kW)
X<20.0
20.0≤X≤30.0
30.0<X≤70.0
70.0<X≤135.0
135.0<X
X≤40.0
X≤68.0
68.0<X
Fig.3.4.1
25
GMV DC Inverter VRF
Model
ML01/A
ML02/A
Model
FQ01A/A
FQ01B/A
FQ02/A
FQ03/A
FQ04/A
FQ14/H1
FQ18/H1
FQ18/H2