Haier AD88NAHAAA Operation And Instruction Manual page 36

INSTALLATION MANUAL FOR OUTDOOR UNIT
Outdoor unit pipelines connection
According to the pipeline connection method connection the distribute pipes and inlet & outlet liquid pipes.
Leak Test
Leak test must be made after connection of the refrigerant pipe according to the following diagram.
Close all the gas and liquid valves.To prevent nitrogen gas from invading the outdoor circulating
system,close the valve tightly before pressure increase,(Both the gas and liquid valves must be tightly
closed.)
Every cooling system must be charged slowly from the gas and liquid valves.
It must be charged from the gas and liquid valves.
Matters needing attention
Never use oxygen,flamable and poisonous gases for the leak test.
Indoor
Tightly
closed
Tightly
closed
Indoor unit
Detailed diagram of the
three-way valve
To the gauge
distributor
(Liquid side)access hole
(Liquid side)three-way valve
Outdoor
Solder joint
Solder joint
Tightly
Solder joint
closed
(Gas side )access hole
(Gas side)three-way valve
Field tube
Field tube
installation
installation
Three-way valve fully
closed(gas side)
Access hole
Access hole
Outdoor unit
Three-way valve fully closed
liquid side
To the unit
35
High-pressure
Low-pressure
gauge
gauge
VL VH
Gauge distributor
6.4
Copper
pipe
Relief valve
6.4
Copper pipe