Mitsubishi PUHY-TM Installation Manual
Air-Conditioners For Building Application
OUTDOOR UNIT
PUHY-TM
PUY-TM
FOR INSTALLER
INSTALLATION MANUAL
For safe and correct use, please read this installation manual thoroughly before installing the air-conditioner unit.
∗ Remote controller (PAR-F25MA) is available as an optional remote controller.
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Contents
1. Safety precautions ...................................................................... 4
1.1. Before installation and electric work ............................... 4
1.2. Before getting installed ................................................... 4
1.3. Before getting installed (moved) - electrical work........... 5
1.4. Before starting the test run ............................................. 5
2. Combination with indoor units..................................................... 6
3. Confirmation of parts attached ................................................... 6
4. Selection of installation site ........................................................ 7
5. Space required around unit ........................................................ 7
5.1. Individual installation ...................................................... 7
5.2. Collective installation and continuous installation........... 8
6. Lifting method and weight of product.......................................... 9
7. Installation of unit........................................................................ 9
7.1. Location of anchor bolt ................................................... 9
7.2. Installation .................................................................... 10
7.3. Connecting direction for refrigerant piping.................... 11
7.4. Noise level .................................................................... 11
8. Caution for snow and seasonal wind ........................................ 12
8.1. Snow and seasonal wind.............................................. 12
8.2. Countermeasure to seasonal wind ............................... 12
9. Refrigerant piping installation ................................................... 12
9.1. Areas of caution............................................................ 13
9.2. Refrigerant piping system............................................. 14
9.3. Caution for piping connection/valve operation .............. 17
9.4. How to install branch pipe ............................................ 18
9.5. Airtight test and evacuation .......................................... 20
9.6. Thermal insulation of refrigerant piping ........................ 21
10.Electrical work ......................................................................... 23
10.1. Caution........................................................................ 23
10.2. Control box and connecting position of wiring............. 24
10.3. Wiring transmission cables ......................................... 25
10.4. Wiring of main power supply and equipment
capacity ....................................................................... 30
11.Test run.................................................................................... 31
11.1. Checking before getting test run ................................. 31
11.2. Test run method .......................................................... 31
11.3. How to cope with test run trouble................................ 32
11.4. Coping with remote controller trouble ......................... 34
11.5. The following phenomena do not represent trouble
(emergency) ................................................................ 35
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1. Safety precautions
1.1. Before installation and electric work
s Before installing the unit, make sure you read all the
“Safety precautions”.
s The “Safety precautions” provide very important points
regarding safety. Make sure you follow them.
Symbols used in the text
Warning:
Describes precautions that should be observed to prevent danger
of injury or death to the user.
Caution:
Describes precautions that should be observed to prevent damage
to the unit.
Symbols used in the illustrations
: Indicates an action that must be avoided.
: Indicates that important instructions must be followed.
: Indicates a part which must be grounded.
: Indicates that caution should be taken with rotating parts. (This
symbol is displayed on the main unit label.) <Color: Yellow>
: Indicates that the main switch must be turned off before servicing.
(This symbol is displayed on the main unit label.) <Color: Blue>
: Beware of electric shock (This symbol is displayed on the main
unit label.) <Color: Yellow>
: Beware of hot surface (This symbol is displayed on the main unit
label.) <Color: Yellow>
: Please pay attention to electric shock fully because this is
ELV
not Safety Extra Low-Voltage (SELV) circuit.
And at servicing, please shut down the power supply for both
of Indoor Unit and Outdoor Unit.
Warning:
Carefully read the labels affixed to the main unit.
• Do not touch the heat exchanger fins.
- Improper handling may result in injury.
• If refrigerant gas leaks during installation work, ventilate the
room.
- If the refrigerant gas comes into contact with a flame, poisonous
gases will be released.
• Install the air conditioner according to this Installation Manual.
- If the unit is installed improperly, water leakage, electric shock, or
fire may result.
• Have all electric work done by a licensed electrician according
to “Electric Facility Engineering Standard” and “Interior Wire
Regulations”and the instructions given in this manual and always use a special circuit.
- If the power source capacity is inadequate or electric work is per-
formed improperly, electric shock and fire may result.
• Securely install the cover of control box and the panel.
- If the cov er and panel are not installed properly, dust or water may
enter the outdoor unit and fire or electric shock may result.
• When installing and moving the air conditioner to another site,
do not charge the it with a refrigerant different from the refrigerant (R22) specified on the unit.
- If a different refrigerant or air is mixed with the original refrigerant,
the refrigerant cycle may malfunction and the unit may be damaged.
• If the air conditioner is installed in a small room, measures must
be taken to prevent the refrigerant concentration from exceeding the safety limit even if the refrigerant should leak.
- Consult the dealer regarding the appropriate measures to prevent
the safety limit from being exceeded. Should the refrigerant leak
and cause the safety limit to be exceeded, hazards due to lack of
oxygen in the room could result.
• When moving and reinstalling the air conditioner, consult the
dealer or an authorized technician.
- If the air conditioner is installed improperly, water leakage, electric
shock, or fire may result.
• After completing installation work, make sure that refrigerant
gas is not leaking.
- If the refrigerant gas leaks and is exposed to a fan heater, stove,
oven, or other heat source, it may generate noxious gases.
• Do not reconstruct or change the settings of the protection devices.
- If the pressure switch, thermal switch, or other protection device is
shorted and operated forcibly, or parts other than those specified
by Mitsubishi Electric are used, fire or explosion may result.
Warning:
• Ask the dealer or an authorized technician to install the air conditioner.
- Improper installation by the user ma y result in water leakage, elec-
tric shock, or fire.
• Install the air unit at a place that can withstand its weight.
- Inadequate strength may cause the unit to fall down, resulting in
injuries.
• Use the specified cables for wiring. Make the connections securely so that the outside force of the cable is not applied to the
terminals.
- Inadequate connection and fastening may generate heat and cause
a fire.
• Prepare for typhoons and other strong winds and earthquakes
and install the unit at the specified place.
- Improper installation may cause the unit to topple and result in in-
jury.
• Always use an air cleaner, humidifier, electric heater, and other
accessories specified by Mitsubishi Electric.
- Ask an authorized technician to install the accessories. Improper
installation by the user may result in water leakage, electric shock,
or fire.
• Never repair the unit. If the air conditioner must be repaired,
consult the dealer.
- If the unit is repaired improperly, water leakage, electric shock, or
fire may result.
1.2. Before getting installed
Caution:
• Do not install the unit where combustible gas may leak.
- If the gas leaks and accumulates around the unit, an explosion
may result.
• Do not use the air conditioner where food, pets, plants, precision instruments, or artwork are kept.
- The quality of the food, etc. may deteriorate.
• Do not use the air conditioner in special environments.
- Oil, steam, sulfuric smoke, etc. can significantly reduce the per-
formance of the air conditioner or damage its parts.
• When installing the unit in a hospital, communication station,
or similar place, provide sufficient protection against noise.
- The inverter equipment, private power generator, high-frequency
medical equipment, or radio communication equipment may cause
the air conditioner to operate erroneously , or f ail to operate . On the
other hand, the air conditioner may affect such equipment by creating noise that disturbs medical treatment or image broadcasting.
• Do not install the unit on a structure that may cause leakage.
- When the room humidity exceeds 80% or when the drain pipe is
clogged, condensation may drip from the indoor unit. Perform collective drainage work together with the outdoor unit, as required.
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1.3. Before getting installed (moved) electrical work
Caution:
• Ground the unit.
- Do not connect the ground wire to gas or water pipes, lightning
rods, or telephone ground lines. Improper grounding may result in
electric shock.
• Install the power cable so that tension is not applied to the cable.
- Tension may cause the cable to break and generate heat and cause
a fire.
• Install an leak circuit breaker, as required.
- If an leak circuit breaker is not installed, electric shock may result.
• Use power line cables of sufficient current carrying capacity
and rating.
- Cables that are too small may leak, generate heat, and cause a
fire.
• Use only a circuit breaker and fuse of the specified capacity.
- A fuse or circuit breaker of a larger capacity or a steel or copper
wire may result in a general unit failure or fire.
• Do not wash the air conditioner units.
- Washing them may cause an electric shock.
• Be careful that the installation base is not damaged by long use.
- If the damage is left uncorrected, the unit may fall and cause per-
sonal injury or property damage.
• Install the drain piping according to this Installation Manual to
ensure proper drainage. Wrap thermal insulation around the
pipes to prevent condensation.
- Improper drain piping may cause water leakage and damage to
furniture and other possessions.
• Be very careful about product transportation.
- Only one person should not carry the product if it weighs more than
20 kg.
- Some products use PP bands for packaging. Do not use any PP
bands for a means of transportation. It is dangerous.
- Do not touch the heat exchanger fins. Doing so may cut your fin-
gers.
- When transporting the outdoor unit, suspend it at the specified po-
sitions on the unit base. Also support the outdoor unit at four points
so that it cannot slip sideways.
• Safely dispose of the packing materials.
- Packing materials, such as nails and other metal or wooden parts,
may cause stabs or other injuries.
- Tear apart and throw away plastic packaging bags so that children
will not play with them. If children play with a plastic bag which w as
not torn apart, they face the risk of suffocation.
1.4. Before starting the test run
Caution:
• Turn on the power at least 12 hours before starting operation.
- Starting operation immediately after turning on the main power
switch can result in severe damage to internal parts. K eep the power
switch turned on during the operational season.
• Do not touch the switches with wet fingers.
- Touching a switch with wet fingers can cause electric shock.
• Do not touch the refrigerant pipes during and immediately after
operation.
- During and immediately after operation, the refrigerant pipes are
may be hot and may be cold, depending on the condition of the
refrigerant flowing through the refrigerant piping, compressor, and
other refrigerant cycle parts. Your hands may suffer burns or frostbite if you touch the refrigerant pipes.
• Do not operate the air conditioner with the panels and guards
removed.
- Rotating, hot, or high-voltage parts can cause injuries.
• Do not turn off the power immediately after stopping operation.
- Always w ait at least five minutes before turning off the power. Oth-
erwise, water leakage and trouble may occur.
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2. Combination with indoor units
The indoor units connectable to this unit are shown below.
Outdoor unit model
name
PUHY-200
PUY-200
PUHY-250
PUY-250
Note:
1. The total capacity of connected indoor unit models represents the total sum of the figures expressed in the indoor model name.
2. Combinations in which the total capacity of the connected indoor units exceeds the capacity of the outdoor unit will reduce the capacity
of each indoor unit below the rated capacity during simultaneous operation. Therefore, if circumstances allows, combine indoor units
within the capacity of the outdoor unit
Total capacity of
connected indoor unit
models
100 to 260
125 to 325
Quantity of connectable
indoor unit
1 to 13
1 to 16
Model name of connectable indoor unit
PLFY- 32 · 40 · 100 · 125 VGM
PLFY- 50 · 63 · 80 NGM
PLFY- 20 · 25 · 32 · 40 · 50 · 63 · 80 · 100 · 125 NLMD
PEFY-20 · 25 · 32 · 40 · 50 · 63 · 80 · 100 · 125 NM
PKFY-20 · 25 NAM
PKFY-32 · 40 · 50 NFM
PCFY- 40 · 63 · 100 · 125 VGM
3. Confirmation of parts attached
This outdoor unit is attached with the parts below. Please check the quantity for each item.
Name 1 Wire mounting plate 2 Conduit mounting plate 3 Conduit mounting plate 4 Conduit mounting plate
Ø40
Shape
Ø33
Ø27
PUHY-200
PUY-200
PUHY-250
Model name
Model name
PUY-250
PUHY-200
PUY-200
PUHY-250
PUY-250
1111
1111
Name 5 Tapping screw M4 × 12 6 Connecting pipe 7 Packing
Shape
inside ø23 outside ø35
611
611
*6 Connecting pipe is fixed with the unit.
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4. Selection of installation site
Select space for installing outdoor unit, which will meet the following
conditions:
• no direct thermal radiation from other heat sources
• no possibility of annoying neighbors by noise from unit
• no exposition to strong wind
• with strength which bears weight of unit
• note that drain flows out of unit when heating
• with space for air passage and service work shown below
Because of the possibility of fire, do not install unit to the space where
generation, inflow, stagnation, and leak of combustible gas is expected.
• Avoid unit installation in a place where acidic solution and spra y (sulfur)
are often used.
• When having cooling operation at an outside air temperature of below 10°C, in order to obtain steady operation of unit, select an installation site not exposed directly to rain and snow, or install air outlet
and inlet ducts. (Refer to Page 12.) Install the outdoor unit at the
same position on the same floor, or above, the indoor unit. (See the
figure at the right.)
• Do not use unit in any special environment where oil, steam and
sulfuric gas exist.
5. Space required around unit
Installation restriction on outdoor unit when cooling operation is performed
when the outdoor air temperature is 10°C or lower
A
(Same floor as indoor unit, or floor above)
A 4 m or less
5.1. Individual installation
Basic space required
A space of at least 250 mm is necessary at the back for inlet air. Taking
servicing, etc. from the rear into account, a space of about 450 mm
should be provided, the same as at the front.
D
A
FE
B
C
<Top view> <Side view>
A 250 mm or more
B 450 mm or more
C Front (outside of machine room)
D Top discharge (open in principle)
E Front inlet (open in principle)
F Rear inlet (open in principle)
When inlet air enters from right and left sides of unit
B
C
A
C
A
B
Hh
D
<Side view>
A L
1 or more
B L2 or more
C Front
D No restrictions on wall height (left and right)
Note:
• Wall heights (H) of the front and the back sides shall be within
overall height of unit.
• When the total height is exceeded, add the “h” dimension of the
figure above to L1 and L2 in the table above.
Model L1 L2
PUHY-200
PUHY-250
PUY-200
PUY-250
450 250
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When unit is surrounded by walls
B
A
D
Hh
A
C
650
B
325
E
h
H
5.2. Collective installation and continuous installation
Space required for collective installation and continuous installation:
When installing several units, leave the space between each block as
shown below considering passage for air and people.
B
*E
C
<Side view>
A L
1 or more
2 or more
B L
C Front
D Front panel
E Rear panel
Note:
• Wall heights (H) of the front and the back sides shall be within
overall height of unit.
• If the panel height is exceeded, add the “h” dimension of the
figure above to L1 and L2 in the table above.
Model L1 L2
PUHY-200
PUHY-250
PUY-200
PUY-250
Example: When h is 100
The L1 dimension becomes 450+100=550 mm.
When there is an obstruction above the unit
450 250
A
C
B
AA
CC
D
B
CCCCC
*FF F F F*E
A
B
*F
B
A
A
B
B
D
B
E
E
GCC
E
A
A
C
CG
D
A 45° or more
B 300 mm or more
C 1000 mm or more
D Air outlet guide (Procured at the site)
When there is little space
up to an obstruction
DD
A
CCHC
A (Must be open)
B Wall height (H)
C Front
D 1000 mm or more
E 250 mm or more
F 450 mm or more
G 900 mm or more
H No restrictions on wall height
Note:
• Open in the two directions
• In case wall height (H) exceeds overall height of unit, add “h”
dimension (h=wall height <H> – overall height of unit) to * marked
dimension.
• If there is a wall at both the front and the rear of the unit, install
up to four units consecutively in the side direction and provide
a space of 1000 mm or more as inlet space/passage space for
each four units.
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6. Lifting method and weight of product
• When carrying the unit suspended, pass the ropes under the unit
and use the two suspension points each at the front and rear.
• Always lift the unit with ropes attached at four points so that impact is
not applied to the unit.
• Attach the ropes to the unit at an angle of 40° or less.
• Use two ropes at least 7 m long.
A
B
A 40° or less
B Rope suspension part
Dangerous!
Weight of product:
PUHY-200 PUHY-250 PUY-200 PUY-250
225 kg 240 kg 220 kg 235 kg
Caution:
Be very careful to carry product.
- Do not have only one person to carry product if it is more than 20 kg.
- PP bands are used to pack some products. Do not use them as a
mean for transportation because they are dangerous.
- Do not touch heat exchanger fins with y our bare hands. Otherwise you
may get a cut in your hands.
- Tear plastic packaging bag and scrap it so that children cannot play
with it. Otherwise plastic packaging bag ma y suffocate children to death.
- When carrying in outdoor unit, be sure to support it at four points. Carrying in and lifting with 3-point suppor t may make outdoor unit unstable, resulting in a fall of it.
7. Installation of unit
7.1. Location of anchor bolt
• Individual installation • Example of collective installation
880±5
*560±2
0
8
8
C
*560±2
A
For collective installation, provide a 10 mm gap between units.
B
560
760
D
10
440
*560±2 *560±2
10
440
880±5
A (Service side)
B Unit
C (Compatible with old models)
D Installation foot
The dimension (560) indicated by the * can also handle 760 mm, taking interchange with old models into account. How ever , handle the depth dimension
(800) at the site.
9
7.2. Installation
;;
26 160 29
38 80
560
B
760
C
990
D
57
ø40
ø27
75 136
105
840 E
880 B
15
910
5555
A
F
• Fix unit tightly with bolts as shown below so that unit will not fall down
due to earthquake or gust.
• Use concrete or angle for foundation of unit.
• Vibration may be transmitted to the installation section and noise
and vibration may be generated from the floor and walls, depending
on the installation conditions. Therefore, provide ample
vibrationproofing (cushion pads, cushion frame, etc.).
A
Down piping and down wiring precautions
When down piping and down wiring are performed, be sure that foundation and base work does not block the base through holes. When down
piping is performed, make the foundation at least 100 mm high so that
the piping can pass under the bottom of the unit.
880±5
B
C
D
E
A Be sure that the corners are firmly seated. If the corners are not firmly
seated, the installation feet may be bent.
B M10 anchor bolt procured at the site.
C Corner is not seated.
D Unit
(Provide ample vibrationproofing between the unit and the foundation by
using cushion pads, cushion frame, etc.)
E Piping and wiring space (Bottom piping, bottom wiring)
F Concrete foundation
F
The foundation and frame work shown below block the through holes
and bottom piping and bottom wiring cannot performed.
H
G
A Bottom piping through hole
B (bolt hole)
C (bolt hole for old models)
D (unit width)
E (unit depth)
F Bottom wiring through hole
G Foundation
H Unit base
H
G
• Be sure to install unit in a place strong enough to withstand its
• Have installation work in order to protect against a str ong wind
When building the foundation, give full attention to the floor strength,
drain water disposal <during operation, drain water flows out of the unit>,
and piping and wiring routes.
Warning:
weight.
Any lack of strength may cause unit to fall down, resulting in a
personal injury.
and earthquake.
Any installation deficiency may cause unit to fall down, resulting in a personal injury.
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7.3. Connecting direction for refrigerant
piping
Three connecting directions are available for refrigerant piping of the
outdoor unit: bottom piping and front piping and left piping.
as shown below:
When performing rear piping, use the rear piping kit sold separately.
However, when the units are installed collectively and consecutively, left
side piping is not available in case that another unit is installed to the left.
A
B
C
A Knock-out hole
B Left piping
C Bottom piping
D Front piping
Note:
In the case of bottom piping, build a 100 mm or higher foundation
so that piping will go through the bottom of the unit.
D
7.4. Noise level
PUHY-200 PUHY-250
PUY-200 PUY-250
56 dB(A) 57 dB(A)
1m
A
1m
B
A Front
B Measuring point
Measuring location: a room free from echoes and reverberations
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