Refrigerant Pipe And Drain Pipe - Mitsubishi Electric City Multi PLFY-P NBMU-E Série Manuel D'installation

2. Installing the indoor unit
Min. 1-3/16
Fig. 2-5
Fig. 2-7

3. Refrigerant pipe and drain pipe

2-3/8 11-3/16
14-27/32
P12, P15, P18, P24, P30
P36
Fig. 3-1
45 2
Fig. 3-2
4
Suspension bolt
A
Ceiling
B
Nut
C
Washer (with insulation)
D
Mounting plate
E
Washer (without insulation)
F
Check using the Installation gauge
G
Main unit
A
Ceiling
B
Gauge
C
Ceiling opening dimensions
D
Fig. 2-6
Main unit
A
Ceiling
B
Installation template (top of the
C
package)
Screw with washer (Accessory)
D
(mm, inch)
Models A
B
80, 3-5/32 74, 2-29/32
85, 3-11/32 77, 3-1/32
2.5. Unit suspension procedures (Fig. 2-5)
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 can not 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 applying ceiling materials.
2.6. Confi rming the position of main unit and tighten-
ing 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 confi rm this, otherwise
condensation may form and drip due to air leakage, etc.
• Confi rm that the main unit is horizontally levelled, using a level or a vinyl tube
fi lled 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 fi n-
ished.
* As for the details of fi tting, refer to the instructions given on the Installation tem-
plate.
3.1. Refrigerant and drainage piping locations of
indoor unit
The fi gure marked with * in the drawing represent the dimensions of the main unit
excluding those of the optional multi function casement. (Fig. 3-1)
Drain pipe
A
Ceiling
B
Grille
C
Refrigerant pipe (liquid)
D
Refrigerant pipe (gas)
E
Water supply inlet
F
Main unit
G
When the optional multi-functional casement is installed, add 135 mm, 5-5/16
*
inch to the dimensions marked on the fi gure.
3.2. Connecting pipes (Fig. 3-2)
• 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).
• The indoor parts of the drain pipe should be wrapped with polyethylene foam
insulation materials (specifi c gravity of 0.03, thickness of 9 mm, 23/64 inch or
more).
• Apply thin layer of refrigerant oil to pipe and joint seating surface before tighten-
ing fl are nut.
• Use two wrenches to tighten piping connections.
• Use refrigerant piping insulation provided to insulate indoor unit connections. In-
sulate carefully.
A Flare cutting dimensions
Copper pipe O.D.
(mm, inch) øA dimensions (mm, inch)
ø6.35, 1/4" 8.7 - 9.1, 11/32-23/64
ø9.52, 3/8" 12.8 - 13.2, 1/2-33/64
ø12.7, 1/2" 16.2 - 16.6, 41/64-21/32
ø15.88, 5/8" 19.3 - 19.7, 49/64-25/32
ø19.05, 3/4" 22.9 - 23.3, 15/16-61/64
Flare dimensions