Operation Test - Toyotomi UTN-18AP User Manual

OPERATION TEST

Pipe expanding method
Note:
Improper pipe expanding is the main cause of refrigerant leakage. Please
expand the pipe according to the following steps:
A: Cut the pipe
§
Confi rm the pipe length according
to the distance of indoor unit and
outdoor unit.
§
Cut the required pipe with pipe
cutter.
B. Remove the burrs
§
Remove the burrs with shaper and prevent the burrs
from getting into the pipe.
C. Put on suitable insulating pipe.
D. Put on the unit 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'')
Φ9.52 (3/8'')
Φ12 – 12.7 (1/2'')
Φ15.8 – 16 (5/8'')
pipe
pipe cutter
A (mm) Maximum
1.3
1.6
1.8
2.4
109
90° leaning uneven burr
piper
shaper
down-
wards
union pipe
pipe
expander hard
mold
pipe
A (mm) Minimum
0.7
1.0
1.0
2.2
GB