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Kaysun KHPI-BI-16VR2XL Manual

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Fig.4-3
Fig.4-4
5 CONNECTING THE REFRIGERANT PIPING
For all guidelines, instructions and specifications regarding refrigerant .pipe between the indoor unit and outdoor
unit, please refer to "Installation and ower's manual " (Aquantia R-32 PRO outdoor unit).
Connecting the 16mm refrigerant pipe to the refrigerant gas connection.
Sufficiently tighten the flare nut （See Fig.5-3）
Check the tightening torque（Refer to the right table）.
Tighten it with a spanner and torque wrench （See Fig.5-4）.
The protective nut is a one-time part, it can not be reused. In
case it is removed,it should be replaced with a new one.(See
Fig.5-5)
Outer
Tightening
Additional tightening
torque(N.cm)
diam.
torque(N.cm)
6.35 1500
1600
(153kgf.cm)
(163kgf.cm)
9.52
2500 2600
(255kgf.cm) (265kgf.cm)
16
4500 4700
(459kgf.cm) (479kgf.cm)
Indoor unit tubing Flare nut Pipings
a Refrigerant liquid connection
b Refrigerant gas connection
Protective nut
Fig. -4Fig. -5
b
a
17.5mm
b
a
17.5mm
Fig.5-2Fig.5-3
CAUTION
When connecting the refrigerant pipes, always use two wrenches/spanners to tighten or loosen the nuts!(See Fig.5-4) Otherwise,
it will cause damage of piping connections and leakage .
If the indoor unit is matched with outdoor unit (4/6kW), the transfer 9.52-6.35(See the table in Page 8) should be mounted on the
refrigerant liquid connection of indoor unit(Refer to Fig.5-2)；The transfer is not used in other types of outdoor unit(8/10/12/14/16kW).
Fig.5-1
12
﹤
17.5mm
… 15 …


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