Mitsubishi Electric MSZ-HR25VF Installation Manual page 5

2-4. PIPE FORMING AND DRAIN PIPING 2-4. PIPE FORMING AND DRAIN PIPING
Pipe Forming Pipe Forming
• Place the drain hose below the refrigerant piping. • Place the drain hose below the refrigerant piping.
• Make sure that the drain hose is not heaved or snaked. • Make sure that the drain hose is not heaved or snaked.
• Do not pull the hose when applying the tape. • Do not pull the hose when applying the tape.
• When the drain hose passes the room, be sure to wrap • When the drain hose passes the room, be sure to wrap
insulation material (obtainable at a store) around it. insulation material (obtainable at a store) around it.
Rear, right, or downward piping Rear, right, or downward piping
1) Put the refrigerant piping and the drain hose 1) Put the refrigerant piping and the drain hose
together, then firmly apply piping tape (G) from together, then firmly apply piping tape (G) from
the end. the end.
2) Insert the piping and the drain hose into the 2) Insert the piping and the drain hose into the
wall hole sleeve (C), and hook the upper part wall hole sleeve (C), and hook the upper part
of the indoor unit on the installation plate (1). of the indoor unit on the installation plate (1).
3) Check if the indoor unit is hooked securely on the installation plate (1) by moving 3) Check if the indoor unit is hooked securely on the installation plate (1) by moving
the unit to left and right. the unit to left and right.
4) Thrust the lower part of the indoor unit into the installation plate (1). 4) Thrust the lower part of the indoor unit into the installation plate (1).
Drain Piping Drain Piping
• Do not cut the drain hose of the unit. (Fig. 1) • Do not cut the drain hose of the unit. (Fig. 1)
• If the extension drain hose has to pass through a room, be sure to wrap it with com- • If the extension drain hose has to pass through a room, be sure to wrap it with com-
mercially sold insulation. mercially sold insulation.
• The drain hose should point downward for easy drain flow. (Fig. 2) • The drain hose should point downward for easy drain flow. (Fig. 2)
• If the drain hose provided with the indoor unit is too short, connect it with drain hose • If the drain hose provided with the indoor unit is too short, connect it with drain hose
(I) that should be provided at your site. (Fig. 3) (I) that should be provided at your site. (Fig. 3)
• When connecting the drain hose to the hard vinyl chloride pipe, be sure to insert it • When connecting the drain hose to the hard vinyl chloride pipe, be sure to insert it
securely into the pipe. (Fig. 4) securely into the pipe. (Fig. 4)
• Make sure that no stress is applied to the connecting portion of the drain hose after • Make sure that no stress is applied to the connecting portion of the drain hose after
installing the indoor unit. Otherwise, breakage or water leakage may result. installing the indoor unit. Otherwise, breakage or water leakage may result.
• Be sure to use the drain hose attached to the indoor unit. Otherwise, water leakage • Be sure to use the drain hose attached to the indoor unit. Otherwise, water leakage
or breakage due to chemical may result. or breakage due to chemical may result.
• Do not apply any agent on the drain port. Doing so may cause breakage. • Do not apply any agent on the drain port. Doing so may cause breakage.
Fig. 1 Fig. 1
Drain Drain
hose hose
Downward Downward
slope slope
Soft hose Soft hose
I.D. 15 mm I.D. 15 mm
Fig. 2 Fig. 2 Fig. 3 Fig. 3
Do not make drain piping as shown below. Do not make drain piping as shown below.
Accumulated Accumulated
Do not raise Do not raise
drain water drain water
Water Water Water Water
Waving Waving
leakage leakage leakage leakage
Felt tape (4) Felt tape (4)
Piping tape (G) Piping tape (G)
Indoor/outdoor unit Indoor/outdoor unit
connecting wire (A) connecting wire (A)
Cut off in case of Cut off in case of
right piping. right piping.
Cut off in case of Cut off in case of
downward piping. downward piping.
Drain hose Drain hose
Hard vinyl chloride Hard vinyl chloride
70 cm 70 cm
pipe I.D. 30 mm pipe I.D. 30 mm
or more or more
Insert Insert
securely securely
Different Different
diameter joint diameter joint
Fig. 4 Fig. 4
Tip of drain Tip of drain
hose dipped hose dipped
Air Air
in water in water
Water Water
Ditch Ditch
leakage leakage
Left or left-rear piping Left or left-rear piping
Note: Note:
Be sure to reattach the drain hose Be sure to reattach the drain hose
Liquid pipe Liquid pipe
and the drain cap in case of left or and the drain cap in case of left or
Gas pipe Gas pipe
left-rear piping. left-rear piping.
Otherwise, it could cause drops Otherwise, it could cause drops
of water to drip down from the of water to drip down from the
drain hose. drain hose.
1) Put the refrigerant piping and the drain hose together, 1) Put the refrigerant piping and the drain hose together,
then firmly apply felt tape (4) from the end. then firmly apply felt tape (4) from the end.
Felt tape (4) overlap width should be 1/3 the tape width. Felt tape (4) overlap width should be 1/3 the tape width.
Use a bandage stopper at the end of felt tape (4). Use a bandage stopper at the end of felt tape (4).
2) Pull out the drain cap at the rear right of the indoor 2) Pull out the drain cap at the rear right of the indoor
unit. (Fig. 1) unit. (Fig. 1)
• Hold the convex section at the end and pull the • Hold the convex section at the end and pull the
drain cap. drain cap.
3) Pull out the drain hose at the rear left of the indoor 3) Pull out the drain hose at the rear left of the indoor
unit. (Fig. 2) unit. (Fig. 2)
• Hold the claw marked by the arrows and pull out • Hold the claw marked by the arrows and pull out
the drain hose forward. the drain hose forward.
4) Put the drain cap into the section to which the drain 4) Put the drain cap into the section to which the drain
hose is to be attached at the rear of the indoor unit. hose is to be attached at the rear of the indoor unit.
(Fig. 3) (Fig. 3)
• Insert not sharp-edged tools such as screwdrivers • Insert not sharp-edged tools such as screwdrivers
into the hole at the end of the cap and insert the into the hole at the end of the cap and insert the
cap fully into the drain pan. cap fully into the drain pan.
5) Insert the drain hose fully into the drain pan at the rear 5) Insert the drain hose fully into the drain pan at the rear
right of the indoor unit. (Fig. 4) right of the indoor unit. (Fig. 4)
• Check if the hose is hooked securely to the projec- • Check if the hose is hooked securely to the projec-
tion of its inserting part at the drain pan. tion of its inserting part at the drain pan.
6) Insert the drain hose into wall hole sleeve (C), and 6) Insert the drain hose into wall hole sleeve (C), and
hook the upper part of indoor unit on installation plate hook the upper part of indoor unit on installation plate
(1). Then, move the indoor unit completely to the left (1). Then, move the indoor unit completely to the left
in order to make placing the piping in the back space in order to make placing the piping in the back space
of the unit easier. of the unit easier.
7) Cut out a piece of cardboard from the shipping box, roll 7) Cut out a piece of cardboard from the shipping box, roll
it up, hook it onto the back rib, and use it as a spacer it up, hook it onto the back rib, and use it as a spacer
to lift the indoor unit. (Fig. 5) to lift the indoor unit. (Fig. 5)
8) Connect the refrigerant piping with the extension pipe 8) Connect the refrigerant piping with the extension pipe
(B). (B).
9) Thrust the lower part of the indoor unit into the instal- 9) Thrust the lower part of the indoor unit into the instal-
lation plate (1). lation plate (1).
At least At least
50 mm 50 mm
gap gap
Cut off in case of Cut off in case of
Piping tape (G) Piping tape (G)
left piping. left piping.
Felt tape (4) Felt tape (4)
Drain cap Drain cap
Drain cap Drain cap
Fig. 1 Fig. 1
Drain hose Drain hose
Fig. 2 Fig. 2
Drain cap Drain cap
Fig. 3 Fig. 3
Drain hose Drain hose
Fig. 4 Fig. 4
Fig. 5 Fig. 5