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2
CONNECTING THE REFRIGERANT PIPES
Flaring the pipe end
(1) Cutting with a pipe cutter
Cut at a right angle.
(2) Deburring
Allow no cutting in the pipe.
(3) Putting in the flare nut.
(4) Flaring
Flare processing dimension (A)
Tool
0 - 0.02 in.
R410A & R32 tool
(0 - 0.5 mm)
Conventional tool 0.04 - 0.06 in.
(1.0 - 1.5 mm)
(5) Checking
To be flared perfectly circular.
Flare nut not missing.
3
AIR REMOVAL
Perform air removal using a vacuum pump.
Use a vacuum pump, gauge manifold and hoses exclusively for R32.
(1) Remove both valve shaft caps of the stop valves.
(2) Remove the service port cap of the stop valve (gas side).
(3) Connect the gauge manifold hose to the service port and the
vacuum pump. Be sure that the hose end to be connected to the
service port has a valve core pusher.
(4) Open the gauge manifold valve and turn on the vacuum pump
for 10-15 minutes. Make sure the compound gauge reads -0.1
MPa(-76 cmHg)(-30 in. Hg).
(5) Close the gauge manifold valve.
(6) Turn off the vacuum pump. Maintain this condition for 1-2 minutes to make sure
that the compound pressure gauge pointer does not swing back.*
(7) Open the stop valve (liquid side) 90° counterclockwise by turning the hexagon
wrench. Close it after 5 second, and check for gas leakage.*
(8) Disconnect the gauge manifold hose from the service port.
(9) Fully open the stop valve (liquid side) with hexagon wrench. Turn all the way up to contact.
(10) Fully open the stop valve (gas side) with hexagon wrench. Turn all the way up to contact.
(11) Firmly tighten the service port cap and both valve shaft caps with a torque wrench at the
specified tightening torque.
1
*
If the compound pressure gauge pointer swing back, there may be a loose pipe joint. Check
all pipe joints and retighten nuts as needed, then repeat steps (4) through (6)
2
*
Check the pipe connections for gas leak using a leakage detector or soapy water.
Use a vacuum pump, gauge manifold and hoses designed exclusively for R32.
4
CONNECTING THE CABLE TO THE OUTDOOR UNIT
Connecting wires and the ground wire
• Use a solid or stranded wire.
Connecting Cable: AWG14
Power Supply Cable: AWG14
• Use a copper wire.
• Follow local electrical codes.
• Use a double insulated cable with 600V insulation.
Connecting Cable
4.7 in.(120 mm)
3.9 in.(100 mm)
Ground Wire
In case using solid wires
Stripping length: 0.7 in. (18 mm)
Be sure to make the wire hook-shaped.
0.7 in.(18 mm)
Copper Wire
In case using stranded wires
Stripping length: 0.3 in. (8mm)
For power supply cable, securely clamp a round
terminal to each end of the stripped wire.
0.3 in. (8 mm)
Round terminal
Copper Wire
Connecting the pipes.
Connect the pipes for the indoor unit first
90°
and then for the outdoor unit.
(1) Tighten the flare nuts by hand for the first 3-4 turns.
(2) Use a wrench and torque wrench to tighten up the pipes.
• Do not over tighten the pipes. It may be deformed or damaged.
A
Note:
• Bend the pipes carefully as not to damage them.
• Lay the drain hose below the pipes.
A
Flare nut tightening torque
Pipe size
Liquid side
Gas side
2
Power supply cable
3.9 in.(100 mm)
3.1 in.(80 mm)
Ground Wire
Fig.1
Torque
1/4"(ø 6.35 mm)
11.8±2ft·lbs (16±2 N·m)
3/8"(ø 9.52 mm)
28±3ft·lbs (38±4 N·m)
Valve shaft cap tightening torque
Pipe size
Torque
Liquid side 1/4" 17.7±2.1ft·lbs (24±3 N·m)
Gas side
3/8" 17.7±2.1ft·lbs (24±3 N·m)
Service port cap tightening torque
Torque
8.1±0.74ft·lbs (11±1 N·m)
1
(1) Strip the copper wires. (Fig.1)
(2) Remove the Cable Cover.
When connecting to three indoor units, remove the cap. (Fig.2)
*The user should keep the cap in case one unit is removed in future.
The cap prevents foreign objects from getting into the unit.
(3) Attach the Conduit Connector to Expansion Valve Angle with lock nut. (Fig.3)
(4) Adjust the length of Connecting Cable. Then connect it to Terminal Board. (Fig.4)
(5) Insert Connecting Cable and Power Supply Cable into Cable Holder by Hook. (Fig.5)
(6) Be sure that the terminal connections are as specified.(Fig.6)
(7) Attach the Cable Cover with the screws. (Fig.2)
(8) Double-check that the Connecting Cable is securely in place.
Cable Holder
Power supply cable
EN-3
Wrench
Gauge manifold
Compound
Lo
Stop valve
gauge
(liquid side)
Hose
Vacuum pump
Service port
Stop valve
(gas side)
Hexagon wrench
Service port
Diagonally 0.2 in. (4 mm)
OPEN
Valve shaft cap
2 Cap
Cable Cover
Connecting Cable
Flare nut
Torque
wrench
Hi
Fig.2
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