Gree DC Inverter Multi VRF User Manual

DC INVERTER MULTI VRF INSTALLATION
140
6 INSTALLATION OF REFRIGERANT PIPING
6.1 Flow Chart of Installation
6.2 Three Principles of Refrigerant Piping Installation
Keep to the three principles of refrigerant piping:
Key Factors
Measures to Avoid Failure
Dry z Invasion of outside water
Example: Rainwater, engineering
water
z Invasion of indoor condensate
Clean z Formation of oxides inside the
pipe during welding
z Invasion of dust and foreign
articles from outside
Airtight z Incomplete welding
z Leakage from flared port
z Leakage from edge
Installation of
indoor unit
Fabrication according to
piping design dimension
Installation of
connection pipes
Expel with nitrogen
Welding
Purge
A
irtight test
Vacuuming and
drying
F
a
b
r
i
cat
i
on o
f
fitting pipe
Purge
Vacuuming and
drying
Expel with nitrogen 0.05～0.3Mpa
Purge
F
a
b
r
i
cat
i
on o
f
fitting pipe
Use suitable materials
(copper tube, soldering bar)
Observe the basic
welding procedures.
Observe the basic operations
for flaring of fitting pipe
Observe the basic
interfacing procedures
Airtight test

Gree DC Inverter Multi VRF Specifications

General

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