Mitsubishi Electronics MSY-D30/36NA Installing The L-Joint, Pipe Forming And Drain Piping

Fig. 1

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)

• Cut L-joint (10) at the position shown in Fig. 3.

•Remove union nut from the unit and install it to L-joint (10).

•Flare end of L-joint (10).

2) Use two torque wrenches to tighten the nut. (tighten torque 65 N•m) (Fig. 4)

3) Install charge nut (9) to the liquid refrigerant piping, which connects the indoor and out- door 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)

Remove panel for piping on right

side of unit

Remove panel for piping on bottom

right side of unit

Fig. 2

Cut

Fig. 3

Tightening	Fig. 4	Slide the pipe cover	Fig. 5
direction		completely to the end.

2-5. PIPE FORMING AND DRAIN PIPING

2-5-1. PIPE FORMING

•Place the drain hose below the refrigerant piping.

•Make sure that the drain hose is not crowded or bent.

•Do not pull the hose when applying the tape.

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Note:

Make sure not to damage the cover of refrigerant pipe when attaching it back on with 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.

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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)

•Hold the convex section at the end and pull the drain cap.

3)Pull out the drain hose at the back left of the indoor unit. (Fig. 2)

•Hold the claw marked by the arrows and pull out the drain hose forward.

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)

•Insert a screwdriver into the hole on the cap and insert the cap fully into the drain pan.

5)Insert the drain hose fully into the drain pan at the back right of the indoor unit. (Fig. 4)

•Check if the hose is hooked securely to the projection of its inserting part at the 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).

Liquid pipe	Gas pipe
	Indoor/outdoor unit
	connecting wire (A)

Felt tape (7)

Piping tape (G)

	Remove panel for piping on
Piping tape (G)	left side of unit.
Felt tape (7)

Drain cap

Fig. 1	Drain hose
	Fig. 2
	Drain hose
Drain cap
Fig. 3	Fig. 4

Fig. 5