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Refrigerant Pipe And Drain Pipe Specifications; Refrigerant Pipe , Drain Pipe And Filling Port; Request For Refrigerant Piping Connection - Mitsubishi Electric CITY MULTI PDFY-P-VM-A Series Installatiehandleiding

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  • DUTCH, pagina 44
3. Change the installation fitting on the back side of the control box as shown in
Fig. 5.3.3.
4. Install the control box on the outside of the indoor unit in accordance with the
arrows. (Fig. 5.3.4)
5. Install the intake sensor removed in (2) in the sensor mounting hole shown in
Fig. 5.3.4 Also, install the piping sensor connectors (CN21, CN29), LEV con-
nector (CN60) and fan connector (FAN1) in the control box.
[Fig. 5.3.1] (P.3)
A Control box cover
[Fig. 5.3.2] (P.3)
B Intake sensor
[Fig. 5.3.3] (P.3)
C Installation fitting
F Control box

6. Refrigerant pipe and drain pipe specifications

To avoid dew drops, provide sufficient antisweating and insulating work to the re-
frigerant and drain pipes.
When using commercially available refrigerant pipes, be sure to wind commer-
cially available insulating material (with a heat-resisting temperature of more than
100°C and thickness given below) onto both liquid and gas pipes.
Be also sure to wind commercially available insulating material (with a form
polyethylene's specific gravity of 0.03 and thickness given below) onto all pipes
which pass through rooms.
1 Select the thickness of insulating material by pipe size.
Pipe size
6.4 mm to 25.4 mm
28.6 mm to 38.1 mm
2 If the unit is used on the highest story of a building and under conditions of
high temperature and humidity, it is necessary to use pipe size and insulating
material's thickness more than those given in the table above.
3 If there are customer's specifications, simply follow them.

6.3. Request for refrigerant piping connection

Description of parts to be used
No.
Work procedures
Mount the provided pipe insula-
tion (1) on the liquid pipe of the
refrigerant piping, and then mount
the flare insulation (2) on the gas
pipe.
1
Fixing of insulated pipe
2
Fixing of flare insulation
3
[Fig. 6.3.1] (P.3)
A "0-0 gas" mark
C "OUTER" mark
E Refrigerant piping (gas)
G Field refrigerant piping
I Insulation material
K Pull in this direction.
M Flare
O Move to the original position.
8
D Front
E cover side
G cross section
Insulating material's thickness
More than 10 mm
More than 15 mm
Detail of work
"INNER" and "OUTER" are marked on the in-
side of the flare insulation. Mount the portion
marked "INNER" near the unit body and the
portion marked "OUTER" on the field piping
side.
• Fasten the insulated pipe with the insula-
tion tape.
• Firmly secure the insulation with the pro-
vided tie band (4) at the position indicated
on the drawing.
• Fasten the flare insulation with the provided
tape (3).
• Fasten with the provided tie band (4) at the
position indicated on the drawing.
B "INNER" mark
D Flare insulation (2)
F Refrigerant piping (liquid)
H Pipe insulation (1)
J Flare
L Insulation material
N There must be no gap.
[Fig. 5.3.4] (P.3)
H Sensor mounting hole
Changing the rear panel installation position
1. Remove the rear panel (6 screws) and change its direction as shown in the
drawing (Fig. 5.3.5).
2. Affix the sealing material supplied in the position shown in the drawing. (Fig.
5.3.5) (If the rear intake filter box is used, it is not necessary to affix the seal
material (small).)
[Fig. 5.3.5] (P.3)
J Rear panel
L Apply the sealing material (small) only when not using the filter box.
[Fig. 5.3.6] (P.3)
B Indoor unit's bottom surface
6.1. Refrigerant pipe and drain pipe specifi-
cations
Model
Item
Liquid pipe
Refrigerant pipe
(Flare connection)
Gas pipe
Drain pipe
6.2. Refrigerant pipe , drain pipe and filling
port
[Fig. 6.2.1] (P.3)
Model name
A
20 - 80
126
100 · 125
121
F Refrigerant piping (liquid pipe)
H Drain piping (when the optional drain-up mechanism is used)
I Drain hole (natural drain outlet)
J Feed-water inlet for checking drain water
K Control box
M Through hole for transmission
Item to be observed
• Using the flare insulation of a different model may
result in condensation forming. Check the model
name on the insulation and be sure to use the cor-
rect one.
• To prevent a gap from forming near the unit's side
plate, be sure that the flare insulation firmly con-
tacts the unit's side plate before mounting.
• Incorrectly mounting the "INNER" and "OUTER"
sides of the insulation may result in condensation
forming.
Seal the slit securely so that there are no openings.
Be sure to mount the insulation so that the slit is on
the top.
Seal the slit securely so that there are no openings.
Be sure to mount the insulation so that the slit is on
the top.
[Fig. 6.3.2] (P.3)
(figure showing the flare insulation)
A Field refrigerant piping
C Unit body plate
E INNER
G Provided flare insulation (2)
[Fig. 6.3.3] (P.3)
A Tape (3)
C Provided tie band (4)
K Sealing material (large)
20 - 40
50 - 80
100 · 125
ø6.35
ø9.52
ø12.7
ø15.88
ø19.05
VP-25
B
C
D
172
265
111
206
305
151
G Refrigerant piping (gas pipe)
L Through hole for power supply
Reference drawing
Fig. 6.3.1 (P.3)
Fig. 6.3.2 (P.3)
(Note *2)
Fig. 6.3.2 (P.3)
Fig. 6.3.3 (P.3)
(Note *3)
Fig. 6.3.3 (P.3)
(Note *4)
B There must be no gap.
D OUTER
F Unit body
B Fasten with tape.

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