Pipe Forming And Drain Piping - Mitsubishi Electric American Standard NAXWST30A112A Series Installation Manual

2-4. INSTALLING THE L-JOINT
1) Install L-joint (10) on the back of the unit. Position L-joint (10) according to the piping
direction. (Fig. 1)
In case of bottom piping (Fig. 2)
3) Install charge nut (9) to the liquid refrigerant piping, which connects the indoor and outdoor
unit.
4) Perform leak test of joint part (the part tightened in "2)"), the nut on the gas side should
remain installed.
5) Slide pipe cover of L-joint (10) and cover the joint. (Fig. 5)

2-5. PIPE FORMING AND DRAIN PIPING

2-5-1. PIPE FORMING
supplied).
Note:
screws.
Left or left-rear piping
Note:
Be sure to reattach the drain hose and the drain cap if the piping is being installed on left
or bottom left of unit, otherwise, water could drip down from the drain hose.
the end.
Felt tape (7) overlap width should be 1/3 the tape width. Use a bandage stopper at the
end of felt tape (7).
2) Pull out the drain cap at the back right of the indoor unit. (Fig. 1)
3) Pull out the drain hose at the back left of the indoor unit. (Fig. 2)
4) Put the drain cap into the section to which the drain hose is to be attached at the rear of
the indoor unit. (Fig. 3)
pan.
5) Insert the drain hose fully into the drain pan at the back right of the indoor unit. (Fig. 4)
drain pan.
6) Insert the drain hose into wall hole sleeve (C), and attach the upper part of indoor unit onto
the installation plate (1). Then, shift the indoor unit completely to the left to make placing
the piping in the back of the unit easier.
7) Cut out two pieces of cardboard from the shipping box (use any two pieces of the four
pieces), roll each piece, hook them onto the back rib, and use them as spacer to lift the
indoor unit. (Fig. 5)
8) Connect the refrigerant piping with the extension pipe (B).
9) Attach the lower part of the indoor unit into the installation plate (1).
Remove panel
for piping on right
side of unit
Remove panel for
piping on bottom
right side of unit
Fig. 1
Cut
Tightening
Fig. 4
direction
Liquid pipe
Felt tape (7)
Piping tape (G)
Piping tape (G)
Felt tape (7)
Drain cap
Fig. 1
Drain cap
Fig. 3
Fig. 2
Fig. 3
Slide the pipe cover
Fig. 5
completely to the end.
Gas pipe
Indoor/outdoor unit
connecting wire (A)
Remove panel for piping on
left side of unit.
Drain hose
Fig. 2
Drain hose
Fig. 4
Fig. 5