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4.4. Insulating pipes (Fig. 4-5)
Refer to the Fig. 4-5 for insulating.
Liquid pipe
Gas pipe
Insulation material
3
Band (large)
4
Band (small)
4
Band (small)
4
Tape
Thermal insulating
material for
refrigerant piping
Thermal insulating
material for liquid pipe
Liquid pipe
13/16 inch
O.D
Drain socket
Apply PVC adhesive
Field drain pipe
Unit’s drain pipe
Felt tape
5
Liquid pipe
Drain pipe
Gas pipe
5. Drainage piping work (Fig. 5-1)
• Use a PVC pipe (I.D. ø20mm, 13/16 inch) for drain piping and provide 1/100 or
more downward slope.
• Other PVC pipe sizes are available with the drain adaptor supplied.
• Drain pipes can be cut with a knife at the connection point according to the on-site
• Drain pipes can be cut with a knife at the connection point according to the on-site
conditions.
• When connecting a PVC pipe, use adhesive to attach the supplied drain socket.
• To prevent dripping condensation, put felt tape
• To prevent dripping condensation, put felt tape
5 over the insulation materials on
the drain pipe.
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.
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.
Fig. 5-1
Fig. 4-5
31/32
43-11/16
7-7/32
4-23/32
2-5/32
1-21/32
2-9/32
4-3/8
C
D
A
D
C
C
B
B
B
E
1
Fig. 4-2
2
1-3/16
1-15/32
2-29/32
3-15/16
1-17/32
5/32
1-3/16
1-15/32
2-29/32
1-17/32
3-27/32
2-9/16
1-15/32
2-9/16
3-15/16
1-17/32
5/32
G
F
H
I
4.3. Positioning refrigerant and drain piping
1 Position of refrigerant and drain piping (Fig. 4-2)
2 Determine the position of the knockout holes on the unit body (Fig. 4-3)
• Make the knockout holes using a saw blade or an adequate knife.
• Make the knockout holes using a saw blade or an adequate knife.
Caution:
The side panel must be removed before drilling a knockout hole in it.
If a hole is made with the side panel in place, the refrigerant pipe within the unit
could be damaged.
If a hole is made with the side panel in place, the refrigerant pipe within the unit
could be damaged.
3 L-shaped connection pipe (for gas piping) (Fig. 4-4)
A 107 mm, 4-7/32 inch (A24, A30),
G For left-side piping
102 mm, 4-1/32 inch (A36)
H For lower-side piping
B Drain hose
I For right-side piping
C Liquid pipe
J L-shaped connection pipe (option)
D Gas pipe
K Unit side
E Drain hose in left-side piping
L On-site piping side
F Knockout holes on the unit body
M Piping
Fig. 4-3
Fig. 4-4
J
M
K
J
L
13-25/34
3-5/32
4. Installing the refrigerant piping
3
(inch)
(inch)
(inch)
(inch)