Installing The Refrigerant Piping - Mitsubishi Electric CITY MULTI PLFY-EP-NEMU-E Serie Para El Instalador

2. Installing the indoor unit
A
C
D
E
F
C
G
B
Fig. 2-5
A
C
B

3. Installing the refrigerant piping

A
45°± 2°
A Flare cutting dimensions
Copper pipe O.D.
(mm, inch)
[6.35, 1/4
[9.52, 3/8
[12.7, 1/2
[15.88, 5/8
[19.05, 3/4
en
B Refrigerant pipe sizes & Flare nut tightening torque
EP06, EP08, EP12, EP15, EP18
EP24, EP30, EP36, EP48
C Apply refrigerating machine oil over the entire flare seat surface.
3
A Suspension bolt
A
B Ceiling
C Nut
D Washer (with insulation)
B
E Mounting plate
F Washer (without insulation)
G Check using the Installation gauge
A
D
B
C
A Main unit
B Ceiling
C Gauge
D Ceiling opening dimensions
Fig. 2-6
A Main unit
B Ceiling
C Installation template
(top of the package)
Fig. 2-7
B
C
Fig. 3-1
Flare dimensions
[A dimensions (mm, inch)
8.7 - 9.1, 11/32 - 23/64
12.8 - 13.2, 1/2 - 33/64
16.2 - 16.6, 41/64 - 21/32
19.3 - 19.7, 49/54 - 25/32
22.9 - 23.3, 15/16 - 61/64
Liquid pipe
Pipe size Tightening
(mm) torque (N.m)
(inch) (ft. Ibs)
ODø6.35 14 - 18
10 - 13
1/4
ODø9.52
34 - 42
3/8 25 - 30
2.5. Unit suspension procedures (Fig. 2-5)
(inch)
Suspend the main unit as shown in the diagram.
Figures given in parentheses represent the dimensions in case of installing optional
multi function casement.
1. In advance, set the parts onto the suspension bolts in the order of the washers
(with insulation), washers (without insulation) and nuts (double).
• Fit the washer with cushion so that the insulation faces downward.
• In case of using upper washers to suspend the main unit, the lower washers (with
insulation) and nuts (double) are to be set later.
2. Lift the unit to the proper height of the suspension bolts to insert the mounting
plate between washers and then fasten it securely.
3. When the main unit cannot be aligned against the mounting hole on the ceiling, it
is adjustable owing to a slot provided on the mounting plate.
• Make sure that A is performed within 17-22 mm, 11/16-7/8 inch. Damage could
result by failing to adhere to this range. (Fig. 2-6)
Caution:
Use the top half of the box as a protective cover to prevent dust or debris from
getting inside the unit prior to installation of the decorative cover or when ap-
plying ceiling materials.
2.6. Confirming the position of main unit and
tightening the suspension bolts (Fig. 2-7)
• Using the gauge attached to the grille, ensure that the bottom of the main unit is
properly aligned with the opening of the ceiling. Be sure to confirm this, otherwise
condensation may form and drip due to air leakage, etc.
• Confirm that the main unit is horizontally levelled, using a level or a vinyl tube filled
with water.
• After checking the position of the main unit, tighten the nuts of the suspension bolts
securely to fasten the main unit.
• The installation template (top of the package) can be used as a protective sheet
to prevent dust from entering the main unit when the grilles are left unattached for
a while or when the ceiling materials are to be lined after installation of the unit is
finished.
Note:
As for the details of fitting, refer to the instructions given on the Installation template.
(top of the package)
3.1. Connecting pipes (Fig. 3-1)
• When commercially available copper pipes are used, wrap liquid and gas pipes
with commercially available insulation materials (heat-resistant to 100 °C, 212 °F
or more, thickness of 12 mm, 1/2 inch or more).
• Apply thin layer of refrigerant oil to pipe and joint seating surface before tightening
flare nut.
• Use 2 wrenches to tighten piping connections.
• Use refrigerant piping insulation provided to insulate indoor unit connections. Insulate
carefully.
• After connecting the refrigerant piping to the indoor unit, be sure to test the pipe
D
connections for gas leakage with nitrogen gas. (Check that there is no refrigerant
leakage from the refrigerant piping to the indoor unit.)
• Use flared nut installed to this indoor unit.
• In case of reconnecting the refrigerant pipes after detaching, make the flared part
of pipe re-fabricated.
Gas pipe
Pipe size Tightening Liquid pipe
(mm) torque (N.m) (mm)
(inch) (ft. Ibs) (inch)
ODø12.7 49 - 61 17
35 - 44 43/64
1/2
ODø15.88 68 - 82 22
49 - 59 7/8
5/8
Flare nut O.D.
Gas pipe
(mm)
(inch)
26
1-1/32
29
1-9/64