Refrigerant Pipe And Drain Pipe - Mitsubishi Electric CITY MULTI PLFY-P20VBM-E Manuel D'installation

2. Installing the indoor unit
Min. 30
Fig. 2-5
Fig. 2-7

3. Refrigerant pipe and drain pipe

60
284 377
Fig. 3-1
45° ± 2°
Fig. 3-2
4
Suspension bolt
Ceiling
Nut
Washer (with insulation)
Mounting plate
Washer (without insulation)
Check using the Installation gauge
Main unit
Ceiling
Gauge
Ceiling opening dimensions
Fig. 2-6
Main unit
Ceiling
Installation template (top of the
package)
Screw with washer (Accessory)
(mm)
Models A B
20, 25, 32, 40, 50 80 74
63, 80, 100, 125 85 77
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. 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. Confirming 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 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.
* As for the details of fitting, refer to the instructions given on the Installation tem-
plate.
3.1. Refrigerant and drainage piping locations of
indoor unit
The figure 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
Ceiling
Grille
Refrigerant pipe (liquid)
Refrigerant pipe (gas)
Water supply inlet
Main unit
* When the optional multi-functional casement is installed, add 135 mm to the
dimensions marked on the figure.
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 or
more, thickness of 12 mm or more).
• The indoor parts of the drain pipe should be wrapped with polyethylene foam in-
sulation materials (specific gravity of 0.03, thickness of 9 mm or more).
• Apply thin layer of refrigerant oil to pipe and joint seating surface before tighten-
ing flare nut.
• Use two wrenches to tighten piping connections.
• Use refrigerant piping insulation provided to insulate indoor unit connections. In-
sulate carefully.
Flare cutting dimensions
Copper pipe O.D.
(mm) øA dimensions (mm)
ø6.35
ø9.52
ø12.7
ø15.88
ø19.05
Warning:
When installing the unit, securely connect the refrigerant pipes before start-
ing the compressor.
Flare dimensions
8.7 - 9.1
12.8 - 13.2
16.2 - 16.6
19.3 - 19.7
22.9 - 23.3