Drainage Piping Work - Mitsubishi Electric CITY MULTI PKFY-P06 NAMU-E Manuel D'installation

4. Installing the refrigerant piping
I PKFY-P06/P08NAMU-E
Fig. 4-8
I PKFY-P12/P15NGMU-E
C
A
Fig. 4-9
I PKFY-P18/P24/P30NFMU-E
B E
E
D
G
H
F
Fig. 4-10

5. Drainage piping work

a
b
c
c
I PKFY-P06/P08NAMU-E
C
B
I PKFY-P12/P15NGMU-E
C
B E
I PKFY-P18/P24/P30NFMU-E
C
B E
A Refrigerant piping and insu-
lation (purchased locally)
B Unit's refrigerant piping
C On-site refrigerant piping
D Vinyl tape
B
A On site pipe and insulation
D
(available from local supplier)
B Unit's gas pipe
C Unit's liquid pipe
E D Pipe cover £
E Bands ¢
F On site gas pipe
G
G On site liquid pipe
F
A A Gas pipe
B Liquid pipe
C Pipe cover £
D
D Band (large) ¢
I
E Band (small) ¢
F On site pipe and insulation (available from
local supplier)
C
G Thermal insulating material for liquid pipe
H Vinyl tape (Purchased locally)
I L-connection pipe (gas pipe) (optional
parts)
d
e
g
c
f
h
D
A B
F
D
A B
Fig. 5-1
Working process
I PKFY-P06/P08NAMU-E (Fig. 4-8)
1. Remove the flare nut and cap of the indoor unit.
2. Make a flare for the liquid pipe and gas pipe and apply refrigerating machine oil
(available from your local supplier) to the flare sheet surface.
3. Quickly connect the on site pipes to the unit.
4. Wrap the pipe cover of the unit and make sure that it covers the insulation material
of the on site liquid pipe.
5. Insulating material of combining it department is covered with the vinyl tape.
I PKFY-P12/P15NGMU-E (Fig. 4-9)
1. Remove the flare nut and cap of the indoor unit.
2. Make a flare for the liquid pipe and gas pipe and apply refrigerating machine oil
(available from your local supplier) to the flare sheet surface.
3. Quickly connect the on site pipes to the unit.
4. Wrap the pipe cover £ that is attached to the gas pipe and make sure that the
connection join is not visible.
5. Wrap the pipe cover of the unit's liquid pipe and make sure that it covers the
insulation material of the on site liquid pipe.
6. Use the bands ¢ that are provided to tighten both ends (3/4 in. (20 mm)) of each
pipe cover £.
I PKFY-P18/P24/P30NFMU-E (Fig. 4-10)
1. Remove the flare nut and cap of the indoor unit.
2. Make a flare for the liquid pipe and gas pipe and apply refrigerating machine oil
(available from your local supplier) to the flare sheet surface.
3. Quickly connect the on site pipes to the unit.
4. Wrap the pipe cover £ that is attached to the gas pipe and make sure that the
connection join is not visible.
5. Wrap the pipe cover of the unit's liquid pipe and make sure that it covers the
insulation material of the on site liquid pipe.
6. Use the bands ¢ that are provided to tighten both ends (3/4 in. (20 mm)) of each
pipe cover £.
5.1. Drainage piping work (Fig. 5-1)
• Drain pipes should have an inclination of 1/100 or more.
• Use PVC pipe for drain piping.
• Drain pipes can be cut with a knife at the connection point according to the on-site
conditions.
i
• When connecting the PVC pipe, use adhesive to attach the supplied drain socket.
• Do not put the drain pipes directly in a drainage ditch where sulphuric gas may be
generated.
• Confirm that water is not leaking at the drain pipe connections.
• When piping has been completed, check to make sure that water flows from the
in.
end of the drain pipe.
a Inclined downwards
b Must be lower than outlet point
c Water leakage
d Trapped drainage
e Air
f Wavy
g The end of drain pipe is under water.
h Drainage ditch
i 2 in. (5 cm) or less between the end of drain pipe and the ground
Caution:
The drain pipe should be installed according to this Installation Manual to en-
sure correct drainage. Thermal insulation of the drain pipes is necessary to
prevent condensation. If the drain pipes are not properly installed and insu-
lated, condensation may drip on the ceiling, floor or other possessions.
Drain pipe connection
A Drain socket §
B Apply PVC adhesive (purchased locally) here for bonding
C On-site drain pipe
D Unit's drain pipe (drain hose)
E Joint pipe ¶ (for use when the size of on-site piping does not fit)
F Band ¢
11