Design, Installation And Insulation Of Refrigerant Pipeline; Notices For Pipeline Design - Gree GMV-S120WL/A-S Service Manual

Note:
To ensure safety during use of water, the inlet and outlet of water tank must be connected with
a specific length of PPR pipe. The length ―L‖ is calculated as below: L≥70×R
pipe length (unit: cm) and R refers to the inner radius of the pipe (unit: cm). Thermal insulation
shall be done and metal pipe shall not be used. For the first time of use, make sure that the water
tank is filled with water before connecting to the power. The water tank shall not run without water.
9.Design, Installation and Insulation of
Refrigerant Pipeline

9.1 Notices for Pipeline Design

1）The air conditioning installation should not damage the bearing structure or the decorative
style;
2）Air conditioning pipes should be laid out along the bottom of the beam as possible. If pipes
meet one another at the same elevation, process based on the following principles:
（1）Drain pipes, air ducts and pressure pipes should leave places for gravity pipes;
（2）Air ducts and small pipes should leave places for major pipes;
3）Make sure the pipes directions and branches are correct with minimum length. Use
minimum number of braze welding junctions and elbows;
4）The refrigerant pipe cannot affect air discharge and return of indoor units.
The minimum distance between the refrigerant pipe with an insulation layer and the air return
box is 300 mm. If the air return or manhole is at the right lower part of the unit, the minimum
distance is 150 mm. When the refrigerant pipe needs to be laid at the air outlet side, avoid laying
the pipe at the front of the air outlet. The refrigerant pipe cannot connect to any part of the unit
except the joint points. If the preceding principles are not followed, performance of the unit will be
affected and running noises will be increased.
GMV5 Home DC Inverter Multi VRF Units
145
2
, in which ―L‖ refers to