Toyotomi CTN-228W User Manual page 53

D: Put on the union nut
• Remove the union nut on the indoor connection pipe and outdoor valve,
install the union nut on the pipe.
E: Expand the port
• Expand the port with expander.
NOTE: «A» is different according to the diameter, please refer to the sheet
below:
Outer diameter (mm)
Φ6 - 6.35(1/4")
Φ9 - 9.52(3/8")
Φ12-12.7(1/2")
Φ15.8-16(5/8")
F: Inspection
Check the quality of expanding port. If there is any blemish, expand the port
again according to the steps above.
union pipe
pipe
expander
A(mm)
Max Min
1.3 0.7
1.6 1.0
1.8 1.0
2.4 2.2
smooth surface
leaning damaged
the length is
equal
53
hard
mold
pipe
improper expanding
crack uneven
surface thickness
GB