REFRIGERANT PIPING CONNECTION
CAUTION
• Be extra careful not to damage, dent or deform the pipe while cutting or bending.
This will drastically reduce the heating/cooling efficiency of the unit.
• When connecting refrigerant pipes, be careful not to use excessive torque. You
should first connect the low-pressure pipe, then the high-pressure pipe.
• Make sure the pipe is properly connected. Over tightening may damage the bell
mouth and under tightening may lead to leakage.
• Ensure to wrap insulation around the piping. Direct contact with the bare pipes may
result in burns or frostbite.
• Check to make sure there is no refrigerant leak after connecting the pipes. If there
is a refrigerant leak, ventilate the area immediately and evacuate the system.
1. Unscrews the valve cover, grasp and
press it down gently to take it down.
2. Remove the protective caps from the end
of valves.
3. Remove the plastic cover from the pipes
and check whether there is any sundry
on the port of the connecting pipe and
make ensure the ports are clean.
4. After align the center, rotate the flare nut
of the connecting pipe to tighten the nut
according to the torque values in the
torque requirements table.
5. Use a spanner hold the body of the valve
and use a torque wrench to tighten the
flare nut according to the correct torque
values.
CONNECTING PIPING TO OUTDOOR UNIT
PIPE Size
Newton meter[N x m]
18 - 20
30 - 35
45 - 50
60 - 65
Pound-force foot (1bf-ft) Kilogram-force meter (kgf-m)
24.4 - 27.1
40.6 - 47.4
61.0 - 67.7
81.3 - 88.1
2.4 - 2.7
4.1 - 4.8
6.2 - 6.9
8.2 - 8.9
Torque Requirements
1/4" (Ø6.35)
3/8" (Ø9.52)
1/2" (Ø12)
5/8" (Ø15.88)
Model
Liquid Pipe Size
Gas Pipe Size
30
1/4" (Ø6.35)
TWS-TSO26H3DVJT
3/8" (Ø9.52)
TWS-TSO35H3DVJT
Product Pipe Sizes
1/4"
(Ø6.35) 3/8" (Ø9.52)
TWS-TSO52H3DVJT
1/4" (Ø6.35)
1/2" (Ø12)
TWS-TSO72H3DVJT
1/4"
(Ø6.35) 1/2" (Ø12)
TWS-TSO88H3DVJT 1/4" (Ø6.35) 5/8" (Ø15.88)
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