Ecox EPTC, Installation Manual, Page: 12 / 20

12
NPTC / EPTC
CEILING AND FLOOR TYPE
The type
of model
Tightening torque
Flare dimension A
(mm) / (in) - max (mm) / (in)
Flare shape
6.35
9.52
12.7
15.9
19
FIG. 7-5
FIG. 7-6
Bend the pipe with thum.
FIG. 7-4
2
3
4
5
6
7
X O
90º
Lean Crude Burr
X X
FIG. 7-1
FIG. 7-2
TABLE 7-2
CAUTION
CAUTION
Bind the connecting pipe and the cables together tightly with
binding tapes. Pass the bound connecting pipe through the
wall conduct from outside. Be careful of the pipe allocation to
do on damage to the tubing.
Connect the pipes. Refer to “How to Connect the pipes” for details.
Expel the air with a vacuum pump. Refer to “How to expel the air
with a vacuum pump” for details.
Open the stop values of the outdoor unit to make the refrigerant
pipe connecting the indoor unit with the outdoor unit in fluent
flow.
Check the leakage. Check all the joints with the leak detector
or soap water.
Cover the joints of the connecting pipe with the soundproof /
insulating sheath (fittings), and bind it well with the tapes to
prevent leakage.
Be sure to with insulating materials cover all the exposed parts of
the flare pipe joints and refrigerant pipe on the liquid-side and the
gas-side. Ensure that there is no gap between them.
Incomplete insulation may cause water condensation.
How to Connect the pipes
Flaring
Cut a pipe with a pipe cutter. (Refer to Fig. 7-1)
Insert a flare nut into a pipe and flare the pipe.
Refer to Table 7-2 for the dimension of flare nut spaces.
Cycle Services Panel
Liquid valve
Cover Board
Gas valve
1
1
1
2
3
2
3
4
90º ± 4
A
45º ±
2
RO.4 -0.8
Remove the Cycle Service Panel and the Cover Board,
unscrewing the screws which secure it to the structure
Remove the protection cover of stop valve.
Connect the indoor unit at first, then the outdoor unit.
Bend the tubing in proper way. Do not harm to them.
The bending angle should not exceed 90º.
Bending position is preferably in the middle of the bendable
pipe. The larger the bending radius the better it is .
Do not bend the pipe more than three times.
When connecting the flare nut, coat the flare both inside and
outside with either oil or ester oil and initially tighten by hand 3
or 4 turns before lighting firmly.
Be sure to use both a spanner and torque wrench together
when connecting or disconnecting pipes to /from the unit.
Too large torque will harm the bellmouthing and too small will cause
leakage. Please determine the torque according to Table 7-2.
After the connecting work is finished, be sure to check that there is no
gas leak.
How to expel the air with a vacuum pump
Stop valve operation introduction
Opening stop valve
Remove the cap and tum the valve counter clock-wise with the
hexagon wrench.
Tum it until the shaft stops. Do not apply excessive force to the
stop valve. Doing so may break the valve body, as the valve is
not a backseat type. Always use the special tool.
Make sure to tighten the cap securely.
FIG. 7-3
15 ~ 16 N.m 8,3 0,3 8,70 0,4
(153 ~ 163 kgf.cm)
25 ~ 26 N.m 12,0 0,5 12,4 0,5
(255 ~ 265 kgf.cm)
35 ~ 36 N.m 15,4 0,6 15,8 0,6
(357 ~ 367 kgf.cm)
45 ~ 47 N.m 18,6 19,0 19,0 0,7
(459 ~ 480 kgf.cm)
65 ~ 67 N.m 22,9 23,3 23,3 0,9
(663 ~ 684 kgf.cm)