Mitsubishi Electronics NGMU-E, PCFY-P User Manual
Air-Conditioners For Building Application
INDOOR UNIT
PCFY-P·NGMU-E
INSTALLATION MANUAL
For safe and correct use, please read this installation manual thoroughly before installing the air-conditioner unit.
Contents
1. Safety precautions ................................................................................... 2
2. Installation location .................................................................................. 3
3. Installing the indoor unit ........................................................................... 3
4. Installing the refrigerant piping ................................................................. 5
1. Safety precautions
s Before installing the unit, make sure you read all the “Safety precau-
tions”.
s Please report to your supply authority or obtain their consent before
connecting this equipment to the power supply system.
Warning:
Describes precautions that must be observed to prevent danger of injury or
death to the user.
Caution:
Describes precautions that must be observed to prevent damage to the unit.
Warning:
• Ask a dealer or an authorized technician to install the unit.
• For installation work, follow the instructions in the Installation Manual and
use tools and pipe components specifically made for use with refrigerant
specified in the outdoor unit installation manual.
• The unit must be installed according to the instructions in order to minimize
the risk of damage from earthquakes, typhoons, or strong winds. An incorrectly installed unit may fall down and cause damage or injuries.
• The unit must be securely installed on a structure that can sustain its weight.
• If the air conditioner is installed in a small room, measures must be taken to
prevent the refrigerant concentration in the room from exceeding the safety
limit in the event of refrigerant leakage. Should the refrigerant leak and cause
the concentration limit to be exceeded, hazards due to lack of oxygen in the
room may result.
5. Drainage piping work ............................................................................... 6
6. Electrical work .......................................................................................... 7
7. Test run .................................................................................................... 9
After installation work has been completed, explain the “Safety Precautions,” use,
and maintenance of the unit to the customer according to the information in the Operation Manual and perform the test run to ensure normal operation. Both the Installation Manual and Operation Manual must be given to the user for keeping. These
manuals must be passed on to subsequent users.
: Indicates a part which must be grounded.
Warning:
Carefully read the labels affixed to the main unit.
• Ventilate the room if refrigerant leaks during operation. If refrigerant comes
into contact with a flame, poisonous gases will be released.
• All electric work must be performed by a qualified technician according to
local regulations and the instructions given in this manual.
• Use only specified cables for wiring.
• The terminal block cover panel of the unit must be firmly attached.
• Use only accessories authorized by Mitsubishi Electric and ask a dealer or
an authorized technician to install them.
• The user should never attempt to repair the unit or transfer it to another location.
• After installation has been completed, check for refrigerant leaks. If refrigerant leaks into the room and comes into contact with the flame of a heater or
portable cooking range, poisonous gases will be released.
1.1. Before installation (Environment)
Caution:
• Do not use the unit in an unusual environment. If the air conditioner is installed in areas exposed to steam, volatile oil (including machine oil), or
sulfuric gas, areas exposed to high salt content such as the seaside, the
performance can be significantly reduced and the internal parts can be damaged.
• Do not install the unit where combustible gases may leak, be produced, flow,
or accumulate. If combustible gas accumulates around the unit, fire or explosion may result.
• Do not keep food, plants, caged pets, artwork, or precision instruments in
the direct airflow of the indoor unit or too close to the unit, as these items can
1.2. Before installation or relocation
Caution:
• Be extremely careful when transporting the units. Two or more persons are
needed to handle the unit, as it weighs 44 lbs. (20 kg) or more. Do not grasp
the packaging bands. Wear protective gloves as you can injure your hands
on the fins or other parts.
• Be sure to safely dispose of the packaging materials. Packaging materials,
such as nails and other metal or wooden parts may cause stabs or other
injuries.
1.3. Before electric work
Caution:
• Be sure to install circuit breakers. If not installed, electric shock may result.
• For the power lines, use standard cables of sufficient capacity. Otherwise, a
short circuit, overheating, or fire may result.
• When installing the power lines, do not apply tension to the cables.
be damaged by temperature changes or dripping water.
• When the room humidity exceeds 80% or when the drainpipe is clogged, water may drip from the indoor unit. Do not install the indoor unit where such
dripping can cause damage.
• When installing the unit in a hospital or communications office, be prepared
for noise and electronic interference. Inverters, home appliances, high-frequency medical equipment, and radio communications equipment can cause
the air conditioner to malfunction or breakdown. The air conditioner may
also affect medical equipment, disturbing medical care, and communications
equipment, harming the screen display quality.
• Thermal insulation of the refrigerant pipe is necessary to prevent condensation. If the refrigerant pipe is not properly insulated, condensation will be formed.
• Place thermal insulation on the pipes to prevent condensation. If the drainpipe is installed incorrectly, water leakage and damage to the ceiling, floor,
furniture, or other possessions may result.
• Do not clean the air conditioner unit with water. Electric shock may result.
• Tighten all flare nuts to specification using a torque wrench. If tightened too
much, the flare nut can break after an extended period.
• Be sure to ground the unit. If the unit is not properly grounded, electric shock
may result.
• Use circuit breakers (ground fault interrupter, isolating switch (+B fuse), and
molded case circuit breaker) with the specified capacity. If the circuit breaker
capacity is larger than the specified capacity, breakdown or fire may result.
1.4. Before starting the test run
Caution:
• Turn on the main power switch more than 12 hours before starting operation.
Starting operation just after turning on the power switch can severely damage the internal parts.
• Before starting operation, check that all panels, guards and other protective
parts are correctly installed. Rotating, hot, or high voltage parts can cause
injuries.
2
• Do not operate the air conditioner without the air filter set in place. If the air
filter is not installed, dust may accumulate and breakdown may result.
• Do not touch any switch with wet hands. Electric shock may result.
• Do not touch the refrigerant pipes with bare hands during operation.
• After stopping operation, be sure to wait at least five minutes before turning
off the main power switch. Otherwise, water leakage or breakdown may result.
2. Installation location
E
D
H
C
W
A
B
UNIT
A
B
A
C
B
26-3/4
12-19/32
3-19/128
5-7/16
3-3/83-5/8
7/16
D
E
F1-11/16
A
F
H D
G
E
2-61/64
1-13/16
A
C
B
4-59/64
5-121/128(8-5/16)6-11/16(9-7/128)
2-3/4
3-19/128 Ø2-1/2 Ø3-15/16
C
7-3/16
H
G
E
GH
F
B
8-7/8
7-13/16
9-5/8
2.1. Outline dimensions (Indoor unit) (Fig. 2-1)
Select a proper position allowing the following clearances for installation and maintenance.
Models W D H ABCE
P15 39-5/8 26-7/32 8-9/32
P24 51-9/16 26-7/32 8-9/32
P30 51-9/16 26-7/32 10-5/8
P36 63-3/4 26-7/32 10-5/8
Min.10-5/8
Min.10-5/8
Min.10-5/8
Min.10-5/8
Min.11-13/16 Min.19-11/16 Max. 9-13/16
Min.11-13/16 Min.19-11/16 Max. 9-13/16
Min.11-13/16 Min.19-11/16 Max. 9-13/16
Min.11-13/16 Min.19-11/16 Max. 9-13/16
Warning:
Mount the indoor unit on a ceiling strong enough to withstand the weight of the
unit.
(inch)
Fig. 2-1
3. Installing the indoor unit
1
4
7
2
5
8
Fig. 3-1
2.2. Outline dimensions (Outdoor unit)
Refer to the outdoor unit installation manual.
3
6
(inch)
3.1. Check the indoor unit accessories (Fig. 3-1)
The indoor unit should be supplied with the following accessories (contained in the
inside of the intake grille).
Accessory name Q’ty
1 Washer 4 pcs
2 Pipe cover 1 pc Large size (For gas tubing)
3 Pipe cover 1 pc Small size (For liquid tubing)
4 Band 4 pcs
5 Joint socket 1 pc Marked with “UNIT”
6 Socket cover 1 pc
7 Drain tubing cover 1 pc
8 Flare nut P36 1 <3/4" (ø19.05)>
3.2. Preparation for installation (Fig. 3-2)
Must be installed at least 8 ft. (2.4 m) above floor or grade level.
3.2.1. Suspension bolt installing spacing
Models A B C
P15 36-23/32 39-5/8 8-9/32
P24 48-13/16 51-9/16 8-9/32
P30 48-13/16 51-9/16 10-5/8
P36 60-29/32 63-3/4 10-5/8
(inch)
Fig. 3-2
(inch)
3.2.2. Refrigerant and drain tubing location
(inch)
Models D E F
P15 5-5/32 6-7/8 7-1/16
P24 5-5/32 6-7/8 7-1/16
P30 7-9/16 9-9/32 7-2/32
P36 7-1/2 9-9/32 7-2/32
A Front side outlet E Right drain tubing
B Left side outlet F Left drain tubing
C Right side outlet G Gas tubing
D Independent piece (Removable) H Liquid tubing
3.2.3. Selection of suspension bolts and tubing positions (Fig. 3-3)
Using the pattern paper provided for installation, select proper positions for suspension bolts and tubing and prepare relative holes.
A Pattern paper
B Suspension bolt hole
C Indoor unit width
Secure the suspension bolts or use angle stock braces or square timbers for bolt
installation.
A Use inserts of 220-230 lbs. each.
B Use suspension bolts of W3/8 or M10 in size
Fig. 3-3
3
B
A
C
1
a
b
C
D
A
E
F
G
H
C
25/64-25/32
1/4-15/32
B
3. Installing the indoor unit
A
F
G
B
ED
C
A
C
B
F
H
A
G
B
ED
C
A
C
B
■ PCFY-P15, P24NGMU-E
■ PCFY-P30, P36NGMU-E
Fig. 3-4
Fig. 3-5
(inch)
3.2.4. Fresh air intake hole (Fig. 3-4)
At the time of installation, use the duct holes (knock out) located at the positions
shown in following diagram, as and when reguired.
A Indoor unit
B Fresh air intake hole (knock out hole)
C 4-ø1/8" (ø2.8) burring hole (P15, P24)
8-ø1/8" (ø2.8) burring hole (P30, P36)
Models A B C D E F G H
12-23/32 3-3/16 2-7/16 1-25/32 1-21/32 1-3/4 2-29/32
P15
P24
P30,P36
(323.1) (80.9) (62) (45) (42) (44.6) (73.6)
13-29/32 3-11/32 2-1/8 1-5/8 1-1/2 3-31/32 5-9/32
(353.6) (84.7) (54) (41) (38) (100.5) (134.5)
16-15/16 5-7/32 5-29/32 3-21/32 3-21/32 7-7/8 9-9/32 3-15/16
(430) (132.3) (150) (93) (93) (200) (236) (100)
inch (mm)
–
–
3.2.5. Indoor unit preparation (Fig. 3-5)
1. Install the suspending bolts. (Procure the W3/8 or M10 bolts locally.)
Predetermine the length from the ceiling (1 within 100 mm).
A Ceiling surface
B Suspending bolt
C Suspending bracket
2. Remove the intake grille.
Slide the intake grille holding knobs (at two locations) backward to open the intake
grille.
3. Remove the side panel.
Remove the side panel holding screws (one in each side, right and left) then slide the
side panel forward for removal.
Fig. 3-6
Fig. 3-7
3.3. Installing the indoor unit
Use a proper suspending method depending on the presence or absence of ceiling
materials as follows. (Fig. 3-6)
In the absence of ceiling materials
a Suspending bracket
b Unit
1) Directly suspending the unit (Fig. 3-7)
Installing procedures
1. Install the washer 1 (supplied with the unit) and the nut (to be locally procured).
2. Set (hook) the unit through the suspending bolts.
3. Tighten the nuts.
Check the unit installing condition.
• Check that the unit is horizontal between the right and left sides.
• Check that the unit slopes continuously downward from the front to the rear.
When embedding pipes, into the wall
2) Installing the suspending bracket first onto the ceiling (Fig. 3-8)
Installing procedures
1. Remove the suspending brackets, U-shaped washers, and suspending bracket
holding screws from the unit.
2. Adjust the suspending bracket holding bolts on the unit.
3. Attach the suspending brackets to the suspending bolts.
4. Set (hook) the unit to the suspending brackets.
∗ Be sure to install the U-shaped washers.
A Bolt
B Unit
C Washer
D Suspending bracket holding screw
E Bolt
F Washer 1
G Double nuts
H P15 35-7/16 - 35-41/64
P24, P30
P36 59-39/54 - 59-13/16
47-1/2 - 47-23/32
(inch)
Fig. 3-8
4
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