Working temperature range
smooth surface
improper expanding
shaper
the length is equal
downwards
union pipe
pipe
leaning
damaged
crack
surface
Remove the union nut on
expander
pipe
C:  Put on suitable insulating pipe
uneven
thickness
 the indoor connection 
hard
mold
Notice
●
●
B: Remove the burrs
●
D: Put on the union nut
Expand the port with expander.
●
E: Expand the port
"A" is different according to the diameter, please
refer to the sheet below: 
Remove the burrs with shaper and prevent
●
F: 
Inspection
pipe
pipe and outdoor valve; 
install the union nut on 
the pipe.
43/26
32/23
27/-
Check the quality of expanding port. If there
24/18
Outdoor side
DB/WB(°C)
Maximum 
cooling
Notice
For some models:
●
Maximum 
heating
Indoor side 
DB/WB(°C)
12
the burrs from getting into the pipe.
is any blemish, expand the port again acco-
rding to the steps above.  
52/32
32/23
27/-
24/18
Outdoor side
DB/WB(°C)
cooling
Maximum 
Notice
●
The operating temperature range (outdoor tempera-
ture) for Low-temperature cooling only unit is
-15°C~43°C; for Low-temperature heat pump unit 
is -22°C~43°C.
Maximum 
heating
Indoor side 
DB/WB(°C)
Notice
●
The operating temperature range (outdoor tempera-
ture) for cooling only unit is -18°C~52°C; for Low-
temperature heat pump unit is -30°C~52°C.
The operating temperature range (outdoor tempera-
ture)  for  cooling  only  unit  is  -15°C~43°C;  for  heat
pump unit is -15°C~43°C.
For models:
GWH07QB-K6DNB2E、GWH09YC-K6DNA1Z、
GWH09QB-K6DNB4Y、GWH12QB-K6DNB4Y、
GWH18QD-K6DNA5X、GWH24AAE-K6DNA4Z
For models:
GWH18YE-S6DBA2A、GWH24YE-S6DBA2A、
GWH09ACC-S6DBA1A、GWH12ACC-S6DBA1A、
GWH18ACE-S6DBA1A
A(mm)
Max Min
Φ6 - 6.35(1/4")
1.3 0.7
Φ9 - 
9.52(3/8") 1.6 1.0
Φ12-12.7(1/2")
1.8 1.0
Φ15.8-16(5/8")
2.4 2.2
Outer diameter
(mm)