Fixing Hanging Bolts; Installing The Unit; Hanging The Unit Body; Confirming The Unit's Position And Fixing Hanging Bolts - Mitsubishi Electric City Multi PEFY-P-VMM-E Manuel D'installation

4. Fixing hanging bolts

4.1. Fixing hanging bolts
(Give the site of suspension a strong structure.)
Hanging structure
• Ceiling: The ceiling structure varies from one building to another. For detailed
information, consult your construction company.
• If necessary, reinforce the hanging bolts with anti-quake supporting members
as countermeasures against earthquakes.
* Use M10 for hanging bolts and anti-quake supporting members (field supply).
1 Reinforcing the ceiling with additional members (edge beam, etc.) must be
required to keep the ceiling level and to prevent the ceiling from vibrations.
2 Cut and remove the ceiling members.
3 Reinforce the ceiling members, and add other members for fixing the ceiling
boards.
For wooden construction
• Use the tie beam (for one story building) or second-floor beam (for two story
building) as strength members.

5. Installing the unit

5.1. Hanging the unit body

s s s s s Bring the indoor unit to an installation site as it is packed.
s s s s s To hang the indoor unit, use a lifting machine to lift and pass through the
hanging bolts.
[Fig. 5.1.1] (P.2)
A Nuts (field supply)
C Washer (field supply)

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.
Also be 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.
6.1. Refrigerant pipe and drain pipe specifications
[Fig. 6.1.1] (P.2)
A Flare forming dimensions
B Refrigerant pipe sizes & Flare nut tightening torque
C Apply refrigerating machine oil over the entire flare seat surface
A Flare forming dimensions
Copper pipe O.D. (mm)
B Refrigerant pipe sizes & Flare nut tightening torque
Liquid pipe
Tightening
Pipe size
P20/25/32/40 ODø6.35 (1/4") 14 – 18
P50 ODø6.35 (1/4") 34 – 42
P63/71/80 ODø9.52 (3/8") 34 – 42
P100/125/140 ODø9.52 (3/8") 34 – 42
* Use the provided flare nut for the following pipes: Liquid pipe of P50, P100, P125, P140 and gas pipe of P50.
6
B M10 Hanging bolt (field supply)
ø6.35
ø9.52
ø12.7
ø15.88
ø19.05
R410A
Gas pipe
Tightening
torque Pipe size torque
(N·m) (N·m)
ODø12.7 (1/2") 49 – 61
ODø12.7 (1/2") 68 – 82
ODø15.88 (5/8") 68 – 82
ODø15.88 (5/8") 100 – 120
• To hang the air-conditioner, use a hard square timer of more than 6 cm if the
distance between beams is less than 90 cm and a hard square timer of more
than 9 cm if the distance between beam is 90 – 180 cm.
[Fig. 4.1.1] (P.2)
A Ceiling
C Tie beam
E Pitch
For reinforced concrete construction
• As shown in the figure below, fix the hanging bolts, or use square timbers to fix
the hanging bolts.
[Fig. 4.1.2] (P.2)
F Insert: 100 to 150 kg (1 piece) (field supply)
G M10 hanging bolt (field supply)
H Reinforcement
Product Weight (kg)
Model name 20 · 25 · 32 40 · 50 63 · 71 · 80
PEFY-P-VMM-E 27
5.2. Confirming the unit's position and fix-
ing hanging bolts
s s s s s Confirm that the unit body and hanging bolts are positioned in place. If
they are not positioned in place, it may result in dew drops due to wind
leak. Be sure to check the positional relationship.
s s s s s Use a level to check that the surface indicated by A A A A A is level. Ensure that
the hanging bolt nuts are tightened to fix the hanging bolts.
s s s s s To ensure that drain is discharged, be sure to hang the unit level using a
level.
Caution:
Be sure to install the unit body level.
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.
Flare dimensions øA dimensions (mm)
R407C or R22
Liquid pipe
Tightening
Pipe size torque Pipe size
(N·m)
ODø6.35 (1/4") 14 – 18 ODø12.7 (1/2")
ODø9.52 (3/8") 34 – 42* ODø15.88 (5/8")
ODø9.52 (3/8") 34 – 42 ODø15.88 (5/8")
ODø9.52 (3/8") 34 – 42 ODø19.05 (3/4")
B Edge beam
D Square timber for hanging the air conditioner
100 125
33 42 62 65
Insulating material's thickness
More than 10 mm
More than 15 mm
8.7 – 9.1
12.8 – 13.2
16.2 – 16.6
19.3 – 19.7
22.9 – 23.3
Flare nut O.D.
Gas pipe
Tightening Liquid
torque pipe
(N·m) (mm)
49 – 61 17
68 – 82* 22
68 – 82 22
100 – 120* 22
140
70
Gas
pipe
(mm)
27
29
29
36