Panasonic U-8MF1E8 User manual
85464369334010 2011
INSTALLATION INSTRUCTIONS – 3-WAY System Air Conditioner –
for Refrigerant R410A
INSTRUCTIONS D’INSTALLATION – Climatiseur Système 3 VOIES –
pour réfrigérant R410A
EINBAUANLEITUNG – 3-WEG-System-Klimaanlage –
für Kühlmittel R410A
ISTRUZIONI DI INSTALLAZIONE – Condizionatore d’aria a 3 vie con sistema –
per refrigerante R410A
INSTRUÇÕES DE INSTALAÇÃO – Sistema de Ar Condicionado de 3 VIAS –
para Refrigerante R410A
ΟΔΗΓΙΕΣ ΕΓΚΑΤΑΣΤΑΣΗΣ –Κλιματιστικό Σύστημα 3Οδών –
για το Ψυκτικό μέσο R410A
INSTRUCCIONES DE INSTALACIÓN
–
Acondicionador de aire con sistema de 3 vías
–
para refrigerante R410A
Outdoor Units
U-8MF1E8, U-10MF1E8, U-12MF1E8,
U-14MF1E8, U-16MF1E8
Heat Pump Unit (3-phase)
Unités extérieures
U-8MF1E8, U-10MF1E8, U-12MF1E8,
U-14MF1E8, U-16MF1E8
Unité pompe à chaleur (Triphasée)
Außeneinheiten
U-8MF1E8, U-10MF1E8, U-12MF1E8,
U-14MF1E8, U-16MF1E8
Wärmepumpeneinheit (dreiphasig)
Unità esterne
U-8MF1E8, U-10MF1E8, U-12MF1E8,
U-14MF1E8, U-16MF1E8
Unità pompa di calore (trifase)
Unidades exteriores
U-8MF1E8, U-10MF1E8, U-12MF1E8,
U-14MF1E8, U-16MF1E8
Unidade de bomba de calor (trifásica)
Εξωτερικές Μονάδες
U-8MF1E8, U-10MF1E8, U-12MF1E8,
U-14MF1E8, U-16MF1E8
Μονάδα Αντλίας Θερμότητας (Τριφασική)
Unidades exteriores
U-8MF1E8, U-10MF1E8, U-12MF1E8,
U-14MF1E8, U-16MF1E8
Unidad de bomba de calor (trifásica)
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– 3WAY System Air Conditioner –
■ R410A Models
Model No.
Outdoor Units
Type 8hp 10hp 12hp 14hp 16hp
MF1 U-8MF1E8 U-10MF1E8 U-12MF1E8 U-14MF1E8 U-16MF1E8
* Refrigerant R410A is used in the outdoor units.
Indoor Units
Indoor Unit Type 22 28 36 45 56
D1 1-Way Cassette S-28MD1E5 S-36MD1E5 S-45MD1E5 S-56MD1E5
L1 2-Way Cassette S-22ML1E5 S-28ML1E5 S-36ML1E5 S-45ML1E5 S-56ML1E5
U1 4-Way Cassette S-22MU1E5 S-28MU1E5 S-36MU1E5 S-45MU1E5 S-56MU1E5
Y1 4-Way Cassette 60 × 60 S-22MY1E5 S-28MY1E5 S-36MY1E5 S-45MY1E5 S-56MY1E5
K1 Wall-Mounted S-22MK1E5 S-28MK1E5 S-36MK1E5 S-45MK1E5 S-56MK1E5
T1 Ceiling S-36MT1E5 S-45MT1E5 S-56MT1E5
F1 Low Silhouette Ducted S-22MF1E5 S-28MF1E5 S-36MF1E5 S-45MF1E5 S-56MF1E5
M1 Slim Low Static Ducted S-22MM1E5 S-28MM1E5 S-36MM1E5 S-45MM1E5 S-56MM1E5
E1 High Static Pressure Ducted
P1 Floor Standing S-22MP1E5 S-28MP1E5 S-36MP1E5 S-45MP1E5 S-56MP1E5
R1 Concealed Floor Standing S-22MR1E5 S-28MR1E5 S-36MR1E5 S-45MR1E5 S-56MR1E5
Indoor Unit Type 73 90 106 140 160
D1 1-Way Cassette S-73MD1E5
L1 2-Way Cassette S-73ML1E5
U1 4-Way Cassette S-73MU1E5 S-106MU1E5 S-140MU1E5 S-160MU1E5
Y1 4-Way Cassette 60 × 60
K1 Wall-Mounted S-73MK1E5 S-106MK1E5
T1 Ceiling S-73MT1E5 S-106MT1E5 S-140MT1E5
F1 Low Silhouette Ducted S-73MF1E5 S-90MF1E5 S-106MF1E5 S-140MF1E5 S-160MF1E5
M1 Slim Low Static Ducted
E1 High Static Pressure Ducted S-73ME1E5 S-106ME1E5 S-140ME1E5
P1 Floor Standing S-71MP1E5
R1 Concealed Floor Standing S-71MR1E5
* S-224ME1E5 and S-280ME1E5 are available.
for Refrigerant R410A
INSTALLATION INSTRUCTIONS
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IMPORTANT!
Please Read Before Starting
This air conditioning system meets strict safety and
operating standards. As the installer or service person,
it is an important part of your job to install or service the
system so it operates safely and efficiently.
For safe installation and trouble-free operation, you
must:
●Carefully read this instruction booklet before beginning.
●Follow each installation or repair step exactly as shown.
●Observe all local, state, and national electrical codes.
●This equipment complies with EN/IEC 61000-3-12
provided that the short-circuit power Ssc is greater than
or equals to the values corresponding to each model as
shown in the table below at the interface point between
the user’s supply and the public system.
It is the responsibility of the installer or user of the
equipment to ensure; by consultation with the distribution
network operator if necessary that the equipment is
connected only to supply with a short-circuit power Ssc
greater than or equals to the values corresponding to
each model as shown in the table below.
U-8MF1E8 U-10MF1E8 U-12MF1E8 U-14MF1E8 U-16MF1E8
Ssc
3840 kW 4710 kW 5340 kW 3580 kW
2870 kW
●This equipment complies with EN/IEC 61000-3-11
provided that the system impedance Zmax is less than
or equal to the values corresponding to each model as
shown in the table below at the interface point between
the user’s supply and the public system. Consult with
the supply authority for the system impedance Zmax.
U-8MF1E8 U-10MF1E8 U-12MF1E8 U-14MF1E8 U-16MF1E8
Zmax
0.079Ω0.079Ω0.079Ω0.079Ω0.079Ω
●Pay close attention to all warning and caution notices
given in this manual.
WARNING
This symbol refers to a hazard or unsafe
practice which can result in severe
personal injury or death.
CAUTION
This symbol refers to a hazard or
unsafe practice which can result in
personal injury or product or property
damage.
If Necessary, Get Help
These instructions are all you need for most installation
sites and maintenance conditions. If you require help for a
special problem, contact our sales/service outlet or your
certified dealer for additional instructions.
In Case of Improper Installation
The manufacturer shall in no way be responsible for
improper installation or maintenance service, including
failure to follow the instructions in this document.
SPECIAL PRECAUTIONS
WARNING When Wiring
ELECTRICAL SHOCK CAN CAUSE
SEVERE PERSONAL INJURY OR DEATH.
ONLY A QUALIFIED, EXPERIENCED
ELECTRICIAN SHOULD ATTEMPT TO
WIRE THIS SYSTEM.
• Do not supply power to the unit until all wiring and tubing
are completed or reconnected and checked.
•
Highly dangerous electrical voltages are used in this system.
Carefully refer to the wiring diagram and these instructions
when wiring. Improper connections and inadequate
grounding can cause accidental injury or death.
• Ground the unit following local electrical codes.
•
Connect all wiring tightly. Loose wiring may cause
overheating at connection points and a possible fire hazard.
•Provide a power outlet to be used exclusively for each
unit, and a power supply disconnect, circuit breaker and
earth leakage breaker for overcurrent protection should
be provided in the exclusive line.
•Provide a power outlet exclusively for each unit, and
full disconnection means having a contact separation
in all poles must be incorporated in the fixed wiring in
accordance with the wiring rules.
•To prevent possible hazards from insulation failure,
the unit must be grounded.
When Transporting
Be careful when picking up and moving the indoor and
outdoor units. Get a partner to help, and bend your knees
when lifting to reduce strain on your back. Sharp edges or
thin aluminum fins on the air conditioner can cut your fingers.
When Installing…
…In a Room
Properly insulate any tubing run inside a room to prevent
“sweating” that can cause dripping and water damage to
walls and floors.
CAUTION
Keep the fire alarm and the air outlet
at least 1.5 m away from the unit.
…In Moist or Uneven Locations
Use a raised concrete pad or concrete blocks to provide
a solid, level foundation for the outdoor unit. This prevents
water damage and abnormal vibration.
…In an Area with High Winds
Securely anchor the outdoor unit down with bolts and a
metal frame. Provide a suitable air baffle.
…In a Snowy Area (for Heat Pump-type Systems)
Install the outdoor unit on a raised platform that is higher
than drifting snow. Provide snow vents.
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Others
CAUTION
• Do not touch the air inlet or
the sharp aluminum fins of the
outdoor unit.You may hurt.
• Do not sit or step on the unit,
you may fall down accidentally.
• Do not stick any object into the
FAN CASE.
You may be injured and the
unit may be damaged.
NOTICE
The English text is the original instructions. Other
languages are translations of the original instructions.
When Connecting Refrigerant Tubing
WARNING
• When performing piping work do
not mix air except for specifIed
refrigerant (R410A) in refrigeration
cycle. It causes capacity down, and
risk of explosion and injury due to
high tension inside the refrigerant
cycle.
• Refrigerant gas leakage may cause
fire.
• Ventilate the room well, in the event that is refrigerant
gas leaks during the installation. Be careful not to allow
contact of the refrigerant gas with a flame as this will
cause the generation of poisonous gas.
• Keep all tubing runs as short as possible.
• Use the flare method for connecting tubing.
•
Apply refrigerant lubricant to the matching surfaces
of the flare and union tubes before connecting them,
then tighten the nut with a torque wrench for a leak-free
connection.
• Check carefully for leaks before starting the test run.
• Do not leak refrigerant while piping work for an
installation or re-installation, and while repairing
refrigeration parts.
Handle liquid refrigerant carefully as it may cause
frostbite.
When Servicing
• Turn the power OFF at the main power box
(mains) before opening the unit to check or repair
electrical parts and wiring.
• Keep your fingers and clothing away from any moving
parts.
• Clean up the site after you finish, remembering to
check that no metal scraps or bits of wiring have been
left inside the unit being serviced.
WARNING
• Do not clean inside the indoor and
outdoor units by users. Engage
authorized dealer or specialist for
cleaning.
• In case of malfunction of this
appliance, do not repair by yourself.
Contact the sales dealer or service
dealer for repair.
CAUTION
• Do not touch the air inlet or
the sharp aluminum fins of the
outdoor unit.You may get hurt.
•
Ventilate any enclosed areas when
installing or testing the refrigeration
system. Escaped refrigerant gas, on
contact with fire or heat, can produce
dangerously toxic gas.
•
Confirm after installation that no
refrigerant gas is leaking. If the gas
comes in contact with a burning stove,
gas water heater, electric room heater
or other heat source, it can cause the
generation of poisonous gas.
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2. The standards for minimum room volume are as follows.
(1) No partition (shaded portion)
(2) When there is an effective opening with the adjacent room
for ventilation of leaking refrigerant gas (opening without
a door, or an opening 0.15% or larger than the respective
floor spaces at the top or bottom of the door).
(3) If an indoor unit is installed in each partitioned room and
the refrigerant tubing is interconnected, the smallest room
of course becomes the object. But when mechanical
ventilation is installed interlocked with a gas leakage
detector in the smallest room where the density limit is
exceeded, the volume of the next smallest room becomes
the object.
3. The minimum indoor floor space compared with the
amount of refrigerant is roughly as follows: (When the
ceiling is 2.7 m high)
40.5
54.0
27.0
13.5
0.0 20100 3040 6070809010050
67.5
81.0
94.5
108.0
121.5
135.0
148.5
162.0
175.5
189.0
202.5
216.0
229.5
243.0
256.0
270.0
m2m3
15
10
5
0
20
25
30
35
40
45
50
55
60
65
70
75
80
85
90
95
100
105
110
115
120
125
283.5
297.0
310.5
324.0
337.5
kg
Check of Density Limit
The room in which the air conditioner is to be installed
requires a design that in the event of refrigerant gas
leaking out, its density will not exceed a set limit.
The refrigerant (R410A), which is used in the air conditioner,
is safe, without the toxicity or combustibility of ammonia, and
is not restricted by laws imposed to protect the ozone layer.
However, since it contains more than air, it poses the risk of
suffocation if its density should rise excessively. Suffocation
from leakage of refrigerant is almost non-existent. With the
recent increase in the number of high density buildings,
however, the installation of multi air conditioner systems is
on the increase because of the need for effective use of floor
space, individual control, energy conservation by curtailing heat
and carrying power, etc.
Most importantly, the multi air conditioner system is able
to replenish a large amount of refrigerant compared to
conventional individual air conditioners. If a single unit of the
multi air conditioner system is to be installed in a small room,
select a suitable model and installation procedure so that if the
refrigerant accidentally leaks out, its density does not reach the
limit (and in the event of an emergency, measures can be made
before injury can occur).
In a room where the density may exceed the limit, create an
opening with adjacent rooms, or install mechanical ventilation
combined with a gas leak detection device. The density is as
given below.
Total amount of refrigerant (kg)
Min. volume of the indoor unit installed room (m3)
< Density limit (kg/m3)
The density limit of refrigerant which is used in multi air
conditioners is 0.3 kg/m3(ISO 5149).
NOTE
1. If there are 2 or more refrigerating systems in a single
refrigerating device, the amount of refrigerant should be as
charged in each independent device.
For the amount of charge in this example:
The possible amount of leaked refrigerant gas in rooms A,
B and C is 10 kg.
The possible amount of leaked refrigerant gas in rooms D,
E and F is 15 kg.
e.g., charged
amount (10 kg)
Indoor unit
Outdoor unit
e.g., charged
amount (15 kg)
Room A Room B Room C Room D Room E Room F
Outdoor unit
Refrigerant tubing
Indoor unit
Mechanical ventilation device – Gas leak detector
Refrigerant tubing
Outdoor unit
Indoor unit
Very
small
room
Small
room Medium
room
Large room
Range below the
density limit of
0.3 kg/m³
(Countermeasures
not needed)
Range above the
density limit of 0.3
kg/m³
(Countermeasures
needed)
Min. indoor volume
Min. indoor floor area
(when the ceiling is 2.7 m high)
Total amount of refrigerant
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Precautions for Installation Using New Refrigerant
1. Care regarding tubing
1-1. Process tubing
●Material: Use C1220 phosphorous deoxidized copper specified in JIS H3300 “Copper and Copper Alloy Seamless Pipes and Tubes.”
For tubes of ø25.4 or larger, use C1220 T-1/2H material or H material, and do not bend the tubes.
●Tubing size: Be sure to use the sizes indicated in the table below.
●Use a tube cutter when cutting the tubing, and be sure to remove any flash. This also applies to distribution joints (optional).
●When bending tubing, use a bending radius that is 4 times the outer diameter of the tubing or larger.
CAUTION
Use sufficient care in handling the tubing. Seal the tubing ends with caps or tape to
prevent dirt, moisture, or other foreign substances from entering. These substances
can result in system malfunction.
Unit: mm
Material O
Copper tube Outer diameter 6.35 9.52 12.7 15.88 19.05 22.22
Wall thickness 0.8 0.8 0.8 1.0 1.2 1.15
Unit: mm
Material 1/2 H, H
Copper tube Outer diameter 25.4 28.58 31.75 38.1 41.28
Wall thickness 1.0 1.0 1.1 over 1.35 over 1.45
1-2. Prevent impurities including water, dust and oxide from entering the tubing. Impurities can cause R410A refrigerant deterioration
and compressor defects. Due to the features of the refrigerant and refrigerating machine oil, the prevention of water and other
impurities becomes more important than ever.
2. Be sure to recharge the refrigerant only in liquid form.
2-1. Since R410A is a non-azeotrope, recharging the refrigerant in gas form can lower performance and cause defects in the unit.
2-2. Since refrigerant composition changes and performance decreases when gas leaks, collect the remaining refrigerant and recharge
the required total amount of new refrigerant after fixing the leak.
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3. Different tools required
3-1. Tool specifications have been changed due to the characteristics of R410A.
Some tools for R22- and R407C-type refrigerant systems cannot be used.
Item New tool?
R407C tools
compatible
with R410A?
Remarks Manifold gauge
Manifold gauge Yes No Types of refrigerant, refrigerating machine oil,
and pressure gauge are different.
Charge hose Yes No To resist higher pressure, material must be
changed.
Vacuum pump Yes Yes Use a conventional vacuum pump if it is equipped
with a check valve. If it has no check valve,
purchase and attach a vacuum pump adapter.
Leak detector Yes No Leak detectors for CFC and HCFC that react to
chlorine do not function because R410A contains
no chlorine. Leak detectors for HFC134a can be
used for R410A.
Vacuum pump
Flaring oil Yes No For systems that use R22, apply mineral oil
(Suniso oil) to the flare nuts on the tubing to
prevent refrigerant leakage. For machines that
use R407C or R410A, apply synthetic oil (ether
oil) to the flare nuts.
* Using tools for R22 and R407C and new tools for R410A together can cause defects.
3-2. Use R410A exclusive cylinder only.
Single-outlet valve
(with siphon tube)
Liquid refrigerant should be
recharged with the cylinder
standing on end as shown.
Valve
Liquid
Outlet
Inlet
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CONTENTS
Page Page
IMPORTANT! . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Please Read Before Starting
Check of Density Limit
Precautions for Installation Using New Refrigerant
1. GENERAL. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
1-1. Tools Required for Installation (not supplied)
1-2. Accessories Supplied with Outdoor Unit
1-3. Type of Copper Tube and Insulation Material
1-4. Additional Materials Required for Installation
1-5. Tubing Length
1-6. Tubing Size
1-7. Straight Equivalent Length of Joints
1-8. Additional Refrigerant Charge
1-9. System Limitations
1-10. Installation Standards
1-11. Check of Limit Density
1-12. Installing Distribution Joint
1-13. Optional Distribution Joint Kit
1-14. Optional Solenoid Valve Kit
1-15. Example of Tubing Size Selection and Refrigerant
Charge Amount
2. SELECTING THE INSTALLATION SITE . . . . . . . . . . . . . 19
2-1. Outdoor Unit
2-2. Shield for Horizontal Exhaust Discharge
2-3. Installing the Outdoor Unit in Heavy Snow Areas
2-4. Precautions for Installation in Heavy Snow Areas
2-5. Dimensions of Wind Ducting
2-6. Dimensions of Snow Ducting
3. HOW TO INSTALL THE OUTDOOR UNIT. . . . . . . . . . . . 24
3-1. Transporting
3-2. Installing the Outdoor Unit
3-3. Routing the Tubing
3-4. Prepare the Tubing
3-5. Connect the Tubing
4. ELECTRICAL WIRING . . . . . . . . . . . . . . . . . . . . . . . . . . 27
4-1. General Precautions on Wiring
4-2. Recommended Wire Length and Wire Diameter for
Power Supply System
4-3. Wiring System Diagram
4-4. Connecting multiple indoor untits to a single solenoid
valve kit
5. HOW TO PROCESS TUBING. . . . . . . . . . . . . . . . . . . . . . 33
5-1. Connecting the Refrigerant Tubing
5-2. Connecting Tubing Between Indoor and Outdoor
Units
5-3. Insulating the Refrigerant Tubing
5-4. Taping the Tubes
5-5. Finishing the Installation
6. AIR PURGING. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
■Air Purging with a Vacuum Pump (for Test Run) Preparation
7. TEST RUN. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
7-1. Preparing for Test Run
7-2. Test Run Procedure
7-3. Main Outdoor Unit PCB Setting
7-4. Auto Address Setting
7-5. Caution for Pump Down
7-6. Meaning of Alarm Messages
8. MARKINGS FOR DIRECTIVE 97/23/EC (PED) . . . . . . . . 49
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1. GENERAL
This booklet briefly outlines where and how to install the
air conditioning system. Please read over the entire set of
instructions for the indoor and outdoor units and make sure all
accessory parts listed are with the system before beginning.
1-1. Tools Required for Installation (not supplied)
1. Flathead screwdriver
2. Phillips head screwdriver
3. Knife or wire stripper
4. Tape measure
5. Carpenter’s level
6. Sabre saw or key hole saw
7. Hacksaw
8. Core bits
9. Hammer
10. Drill
11. Tube cutter
12. Tube flaring tool
13. Torque wrench
14. Adjustable wrench
15. Reamer (for deburring)
1-2. Accessories Supplied with Outdoor Unit
Table 1-1 (Outdoor Unit)
Unit: pcs
Part name Figure Q’ty
8 hp 10 hp 12 hp 14 hp 16 hp
Connection tubing
Outer
diameter
ø28.58
Inner
diameter
ø25.4 00001
Outer
diameter
ø25.4
Inner
diameter
ø19.05 00100
Outer
diameter
ø22.22
Inner
diameter
ø19.05 01011
Outer
diameter
ø19.05
Inner
diameter
ø15.88 01100
Outer
diameter
ø12.7
Inner
diameter
ø9.52 00100
hp = horsepower
1-3. Type of Copper Tube and Insulation Material
If you wish to purchase these materials separately from a local
source, you will need:
1. Deoxidized annealed copper tube for refrigerant tubing.
2. Foamed polyethylene insulation for copper tubes as
required to precise length of tubing. Wall thickness of the
insulation should be not less than 8 mm.
3. Use insulated copper wire for field wiring. Wire size varies
with the total length of wiring. Refer to 4. ELECTRICAL
WIRING for details.
CAUTION
Check local electrical codes and regulations before
obtaining wire. Also, check any specified instructions or
limitations.
1-4. Additional Materials Required for Installation
1. Refrigeration (armored) tape
2. Insulated staples or clamps for connecting wire (See your
local codes.)
3. Putty
4. Refrigeration tubing lubricant
5. Clamps or saddles to secure refrigerant tubing
6. Scale for weighing
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1-5. Tubing Length
Select the installation location so that the length and size of refrigerant tubing are within the allowable range shown in the figure below.
Table 1-2 Ranges that Apply to Refrigerant Tubing Lengths and to Differences in Installation Heights
Items Marks Contents Length (m)
Allowable tubing length
L1 Max. tubing length Actual length ≤150
Equivalent length ≤175
ΔL (L2 – L4) Difference between max. length and min. length from the No. 1
distribution joint ≤40
LM Max. length of main tubing (at max. diameter) ≤80 *3
1,2... 40 Max. length of each distribution tube ≤30
L1+ 1+ 2... 39+
A+ B+LF+LG+LH
Total max. tubing length including length of each distribution tube (only
liquid tubing) ≤300
L5 Distance between outdoor units ≤10
Allowable elevation difference
H1
When outdoor unit is installed higher than indoor unit ≤50
When outdoor unit is installed lower than indoor unit ≤40
H2 Max. difference between indoor units ≤15
H3 Max. difference between outdoor units ≤4
Allowable length of joint tubing
L3 T-joint tubing (field-supply); Max. tubing length between the first T-joint
and solidly welded-shut end point ≤2
L = Length, H = Height
NOTE
1. The outdoor connection main tubing (LO portion) is determined by the total capacity of the outdoor units that are connected to the
tube ends.
2. If the longest tubing length (L1) exceeds 90 m (equivalent length), increase the sizes of the main tubes (LM) by 1 rank for the
discharge tubes, suction tubes, and liquid tubes. (Use a field supply reducer.)
3. If the longest main tube length (LM) exceeds 50 m, increase the main tube size at the portion before 50 m by 1 rank for the suction
tubes and discharge tubes. (Use a field supply reducer.)
(For the portion that exceeds 50 m, set based on the main tube sizes (LA) listed in the table on the following page.)
Balance tubing
(ø9.52)
For
extension
Max. 40 cm
For
extension
Max. 40 cm
T-joint tubing
(header joint system)
Solenoid valve kit
R410A distribution joint
CZ-P680PH2 (for outdoor unit)
CZ-P1350PH2 (for outdoor unit)
CZ-P224BH2 (for indoor unit)
CZ-P680BH2 (for indoor unit)
CZ-P1350BH2 (for indoor unit)
Explanation of symbols
Distribution joint
(CZ: purchased separately)
Ball valve (field supply)
T-joint (field supply)
Solidly welded shut
(pinch weld)
Note: Do not use commercially available T-joints for the liquid tubing and parts.
* Be sure to use special R410A distribution joints (CZ: purchased separately) for outdoor
unit connections and tubing branches.
1. Main tubing length LM = LA + LB … ≤80 m
2. Main distribution tubes LC – LH are selected according to the capacity after the
distribution joint.
3. The outdoor connection main tubing (LO portion) is determined by the total capacity of the
outdoor units that are connected to the tube ends.
4. Sizes of indoor unit connection tubing 1 – 40 are determined by the connection
tubing sizes on the indoor units.
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1-6. Tubing Size
Table 1-3 Main Tubing Size (LA)
hp=horsepower
kW 22.4 28.0 33.5 40.0 45.0 50.4 56.0 61.5 68.0 73.0 78.5 85.0 90.0 96.0
Total system horsepower (hp)
8 10121416182022242628303234
Combined outdoor units (hp)
8 1012141610
8
10
10
12
10
14
10
16
10
16
12
16
14
16
16
14
10
10
Suction tubing (mm)
ø19.05 ø22.22
ø25.40
ø28.58
ø28.58 ø31.75
Discharge tubing (mm)
ø15.88
ø19.05 ø22.22 ø25.40 ø28.58
Liquid tubing (mm) ø9.52 ø12.70 ø15.88 ø19.05
kW 101.0 106.5 113.0 118.0 123.5 130.0 135.0
Total system horsepower (hp)
36 38 40 42 44 46 48
Combined outdoor units (hp)
16
10
10
16
12
10
16
14
10
16
16
10
16
16
12
16
16
14
16
16
16
Suction tubing (mm) ø38.10
Discharge tubing (mm)
ø28.58
ø31.75
Liquid tubing (mm) ø19.05
*1: If future extension is planned, select the tubing diameter based on the total horsepower after extension.
However extension is not possible if the resulting tubing size is two ranks higher.
*2: The balance tube (outdoor unit tube) diameter is ø9.52.
*3: Type 1 tubing should be used for the refrigerant tubes.
*4: If the length of the longest tube (L1) exceeds 90 m (equivalent length), increase the main tube (LM) size by 1 rank for the suction,
discharge, and liquid tubes. (Use field-supply reducers.) (Select from Table 1-3 and Table 1-8.)
*5: If the longest main tube length (LM) exceeds 50 m, increase the main tube size at the portion before 50 m by 1 rank for the suction
tubes and discharge tubes.
(For the portion that exceeds 50 m, set based on the main tube sizes (LA) listed in the table above.)
■Size of tubing (LO) between outdoor units
Select the size of tubing between outdoor units based on the main tubing size (LA) as given in the table above.
Table 1-4 Main Tubing Size After Distribution (LB, LC...)
Total capacity after distribution
Below kW 7.1
(2.5 hp)
16.0
(6 hp)
25.0
(9 hp)
30.0
(11 hp)
36.4
(13 hp)
42.0
(15 hp)
47.6
(17 hp)
58.8
(21 hp)
70.0
(25 hp)
Over kW – 7.1
(2.5 hp)
16.0
(6 hp)
25.0
(9 hp)
30.0
(11 hp)
36.4
(13 hp)
42.0
(15 hp)
47.6
(17 hp)
58.8
(21 hp)
Tubing size
Suction tubing (mm) ø15.88 ø19.05 ø19.05 ø22.22 ø25.40 ø25.40 ø28.58 ø28.58 ø28.58
Discharge tubing (mm) ø12.70 ø15.88 ø15.88 ø19.05 ø19.05 ø22.22 ø22.22 ø22.22 ø25.40
Liquid tubing (mm) ø9.52 ø9.52 ø9.52 ø9.52 ø12.70 ø12.70 ø12.70 ø15.88 ø15.88
Total capacity after distribution
Below kW 75.6
(27 hp)
98.0
(35 hp)
103.6
(37 hp)
–
Over kW 70.0
(25 hp)
75.6
(27 hp)
98.0
(6 hp)
103.6
(37 hp)
Tubing size
Suction tubing (mm) ø31.75 ø31.75 ø38.10 ø38.10
Discharge tubing (mm) ø25.40 ø28.58 ø28.58 ø31.75
Liquid tubing (mm) ø19.05 ø19.05 ø19.05 ø19.05
Table 1-5 Outdoor Unit Tubing Connection Size ( A – C)
kW 22.4 28.0 33.5 40.0 45.0
Suction tubing ø19.05 ø22.22 ø25.4 ø28.58
Brazing connection
Discharge tubing ø15.88 ø19.05 ø22.22
Brazing connection
Liquid tubing ø9.52 ø12.7
Brazing connection
Balance tubing ø9.52
Flare connection
Unit: mm
*1: The outdoor unit connection tubing
(LO) is determined by the total capacity
of the outdoor units connected to the
tube ends. The tubing size is selected
based on the table of main tube sizes
after the branch.
*2: If the total capacity of the indoor units
connected to the tube ends is different
from the total capacity of the outdoor
units, then the main tube size is
selected based on the total capacity of
the outdoor units.
(For LA, LB, and LF in particular)
hp = horsepower
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Table 1-6 Indoor Unit Tubing Connection Size ( 1 – 40)
Indoor unit type 22 28 36 45 56 73 90 106 140 160 224*1 280*1
Distribution joint –
solenoid valve kit
tubing
Suction tubing (mm)
ø15.88
ø19.05 ø22.22
Discharge tubing (mm)
ø12.70
ø15.88 ø19.05
Liquid tubing (mm)
ø9.52
Solenoid valve kit –
Indoor unit tubing
connection
Gas tubing (mm) ø12.70 ø15.88
ø19.05 ø22.22
Liquid tubing (mm)
ø6.35 ø9.52
*1: For the solenoid valve kits, use CZ-P160HR2 with parallel specifications. Branch the tubing before and after the solenoid valve kits.
1-7. Straight Equivalent Length of Joints
Design the tubing system by referring to the following table for the straight equivalent length of joints.
Table 1-7 Straight Equivalent Length of Joints
Gas tubing size (mm) 12.7 15.88 19.05 22.22 25.4 28.58 31.8 38.1
90° elbow 0.30 0.35 0.42 0.48 0.52 0.57 0.70 0.79
45° elbow 0.23 0.26 0.32 0.36 0.39 0.43 0.53 0.59
U-shape tube bent
(R60 − 100 mm) 0.90 1.05 1.26 1.44 1.56 1.71 2.10 2.37
Trap bend 2.30 2.80 3.20 3.80 4.30 4.70 5.00 5.80
Y-branch distribution joint Equivalent length conversion not needed.
Ball valve for service Equivalent length conversion not needed.
Table 1-8 Refrigerant tubing (Existing tubing can be used.)
Tubing size (mm)
Material O Material 1/2H • H
ø6.35 t0.8 ø25.40 t1.0
ø9.52 t0.8 ø28.58 t1.0
ø12.7 t0.8 ø31.75 t1.1
ø15.88 t1.0 ø38.10 t1.15
ø19.05 t1.0 ø41.28 t1.20
ø22.22 t1.15
1-8. Additional Refrigerant Charge
Additional refrigerant charge amount is calculated from the liquid tubing total length as follows.
Required amount of additional refrigerant charge = [ (Amount of additional refrigerant charge per meter of each size of liquid tube × its tube
length) + (...) + (...)] + [(Necessary amount of additional refrigerant charge per outdoor unit + (...) + (...)]
*Always charge accurately using a scale for weighing.
Table 1-9-1 Amount of Additional Refrigerant Charge Per Meter, According to Liquid Tubing Size
Liquid tubing size (mm) 6.35 9.52 12.7 15.88 19.05 22.22
Amount of additional
refrigerant charge/m (g/m) 26 56 128 185 259 366
Table 1-9-2 Necessary Amount of Additional Refrigerant Charge Per Outdoor Unit
U-8MF1E8 U-10MF1E8 U-12MF1E8 U-14MF1E8 U-16MF1E8
3.2 kg 3.2 kg
Table 1-10 Refrigerant Charge Amount at Shipment (for Outdoor Unit)
U-8MF1E8 U-10MF1E8 U-12MF1E8 U-14MF1E8 U-16MF1E8
11.8 kg 11.8 kg 11.8 kg 11.8 kg 11.8 kg
* When bending the tubes, use a bending radius that is
at least 4 times the outer diameter of the tubes.
In addition, take sufficient care to avoid crushing or
damaging the tubes when bending them.
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1-9. System Limitations
Table 1-11 System Limitations
Max. No. allowable connected outdoor units 3
Max. capacity allowable connected outdoor units 135 kW (48 hp)
Max. connectable indoor units 40 *1
Max. allowable indoor/outdoor capacity ratio 50 – 130%
*1: In the case of 22 hp (type 61.5 kW) or smaller units, the number is limited by the total capacity of the connected indoor units.
1-10. Installation Standards
Relationship between A/C units and refrigerant tubing
Common solenoid valve kit
●Multiple indoor units under group control can utilize a solenoid valve kit in common.
●Categories of connected indoor unit capacities are determined by the solenoid valve kit.
Type of solenoid valve kit Total capacity of indoor units (kW)
CZ-P160HR2 5.6 < Total capacity ≤16.0
CZ-P56HR2 2.2 ≤Total capacity ≤5.6
●If the capacity range is exceeded, use 2 solenoid valves connected in parallel.
●Install the solenoid valve kit 30 m or less from the indoor unit.
●In quiet locations such as hospitals, libraries, and hotel rooms, the refrigerant noise may be somewhat noticeable. It is
recommended that the solenoid valve kit be installed inside the corridor ceiling, at a location outside the room.
Outdoor unit Outdoor unit Solenoid
valve kit Indoor unit
4-tube layout 3-tube layout 2-tube layout
Suction tube
Discharge tube
Liquid tube
Balance tube
Suction tube
Discharge tube
Liquid tube
Gas tube
Liquid tube
Room Room Room Room
Indoor unit Indoor unit Indoor unit Indoor unit
Hallway Hallway
Solenoid
valve kit
Solenoid
valve kit
Desirable Undesirable
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WARNING
Always check the gas density limit for the room in which
the unit is installed.
1-11. Check of Limit Density
When installing an air conditioner in a room, it is necessary to
ensure that even if the refrigerant gas accidentally leaks out, its
density does not exceed the limit level for that room.
If the density could exceed the limit level, it is necessary to
provide an opening between the unit and the adjacent room,
or to install mechanical ventilation which is interlocked with the
leak detector.
(Total refrigerant charged amount: kg)
(Min. indoor volume where indoor unit is installed: m3)
< Limit density 0.3 (kg/m3)
The limit density of refrigerant which is used in this unit is
0.3 kg/m3(ISO 5149).
The shipped outdoor unit comes charged with the amount of
refrigerant fixed for each type, so add it to the amount that
is charged at the field. (For the refrigerant charge amount at
shipment, refer to the unit’s nameplate.)
Minimum indoor volume & floor area as against the amount of
refrigerant is roughly as given in the following table.
40.5
54.0
27.0
13.5
0.0 20100 3040 6070809010050
67.5
81.0
94.5
108.0
121.5
135.0
148.5
162.0
175.5
189.0
202.5
216.0
229.5
243.0
256.0
270.0
m2m3
15
10
5
0
20
25
30
35
40
45
50
55
60
65
70
75
80
85
90
95
100
105
110
115
120
125
283.5
297.0
310.5
324.0
337.5
kg
CAUTION
Pay special attention to any location, such as a basement,
etc. where leaking refrigerant can accumulate, since
refrigerant gas is heavier than air.
1-12. Installing Distribution Joint
(1) Refer to “HOW TO ATTACH DISTRIBUTION
JOINT” enclosed with the optional distribution joint
kit (CZ-P680PH2, P1350PH2, P224BH2, P680BH2,
P1350BH2).
(2)
When creating a branch using a commercially available T-joint
(header joint system), orient the main tubing so that it is either
horizontal (level) or vertical. In order to prevent accumulation
of refrigerant oil in stopped units, if the main tubing is
horizontal then each branch tubing length “B” should be at
an angle that is greater than horizontal. If the main tubing is
vertical, provide a raised starting portion for each branch.
When only one indoor unit is connected to the side of “A”,
install part “A” at a positive angle (15-30º) for the field tubing
as shown in the figure.
[Header joint system]
●Be sure to solidly weld shut the T-joint end (marked
by “X” in the figure). In addition, pay attention to the
insertion depth of each connected tube so that the flow
of refrigerant within the T-joint is not impeded.
●When using the header joint system, do not make
further branches in the tubing.
●
Do not use the header joint system on the outdoor unit side.
(3) If there are height differences between indoor units or if
branch tubing that follows a distribution joint is connected
to only 1 unit, a trap or ball valve must be added to that
distribution joint. (When adding the ball valve, locate it
within 40 cm of the distribution joint.)
(Consult with the dealer separately concerning the ball
valve.)
If a trap or ball valve is not added, do not operate the
system before repairs to a malfunctioning unit are
completed. (The refrigerant oil sent through the tubing
to the malfunctioning unit will accumulate and may
damage the compressor.)
B
A
BA
A
B
Tube branching methods (horizontal use)
15 to 30º
Horizontal
line View as seen
from arrow
Arrow view C
Arrow view D
15 to 30º
view C
view D
Types of vertical trap specifications
(When using ball valve)
Main tubing
Ball valve
(BV: purchased
separately)
Indoor unit (more than 2 units)
(If only 1 unit is connected, a ball
valve is also needed on this side.)
Indoor unit (1)
(When not using ball valve)
Main tubing Horizontal
Indoor unit
Branch tubing is
directed upward.
(Each unit is connected
to tubing that is either
level or is directed
downward.)
More than
20 cm
Indoor unit is directed downward
Header joint system (Indoor)
Outdoor
Indoor
Indoor
Install at a positive angle
Install at a
positive angle
(15 – 30°)
Indoor
L3 <2 m Solidly welded
shut (X)
Horizontal
line
Horizontal
line
Range below the
density limit of
0.3 kg/m³
(Countermeasures
not needed)
Range above the
density limit of 0.3
kg/m³
(Countermeasures
needed)
Total amount of refrigerant
Min. indoor volume
Min. indoor floor area
(when the ceiling is 2.7 m high)
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1-13. Optional Distribution Joint Kit
See the installation instructions packaged with the distribution joint kit for the installation procedure.
Table 1-12
Model name Cooling capacity
after distribution Remarks
CZ-P680PH2 68.0 kW or less For outdoor unit
CZ-P1350PH2 135.0 kW or less For outdoor unit
CZ-P224BH2 22.4 kW or less For indoor unit
CZ-P680BH2 68.0 kW or less For indoor unit
CZ-P1350BH2 135.0 kW or less For indoor unit
■Tubing size (with thermal insulation)
CZ-P680PH2
For outdoor unit (Capacity after distribution joint is 68.0 kW or less.)
IHIH
I
H
GFEEFG
E
F
G
CC
D
E
CDEF
F
C
DFG
G
E
D
C
F
E
D
DE
50340
130
G
G
G
C
C
490
300
C
112
126
D
D
D
C
490
300
126
10183
230230
Table 1-13 Dimensions for connections of each part
Position A B C D E F G H I J
Dimension
– – ø28.58 ø25.4 ø22.22 ø19.05 ø15.88 ø12.7 ø9.52 –
CZ-P1350PH2
For outdoor unit (Capacity after distribution joint is greater than 68.0 kW and no more than 135.0 kW.)
GFEEFG
E
F
G
HI
H
I
I
H
ACB
A
B
B
BA
C
D
EDF
CEF
F
D
C
C
E
D
C
D
130
340
G
G
G
50
B
B
B
B
C
615
375
180
315 66
105 112
230
C
490
300
126
11253
C
C
C
Table 1-14 Dimensions for connections of each part
Position A B C D E F G H I J
Dimension
ø38.1 ø31.75 ø28.58 ø25.4 ø22.22 ø19.05 ø15.88 ø12.7 ø9.52 –
Suction tubing Discharge tubing Liquid tubing
Thermal insulation Thermal insulation
Thermal insulation
Unit: mm
Example: (C below indicates inner diameter. below indicates outer diameter.)
Example: (C below indicates inner diameter. below indicates outer diameter.)
Suction tubing Discharge tubing
Liquid tubing
Thermal insulation
Thermal insulation
Thermal insulation
Unit: mm
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Table 1-15 Dimensions for connections of each part
Position A B C D E F G H I J
Dimension
ø38.1 ø31.75 ø28.58 ø25.4 ø22.22 ø19.05 ø15.88 ø12.7 ø9.52 –
CZ-P224BH2
Use: For indoor unit (Capacity after distribution joint is 22.4 kW or less.)
CZ-P680BH2
Use: For indoor unit (Capacity after distribution joint is greater than 22.4 kW and no more than 68.0 kW.)
CZ-P1350BH2
Use: For indoor unit (Capacity after distribution joint is greater than 68.0 kW and no more than 135.0 kW.)
G
GH
F
F
H
G
G
G
G
FH
HH
HIIH
H
I
F
F
F
H
H
H
210
55
92
12
145
55
40
77
7
186
136
69
235
GFEEFG
E
F
G
HI
H
I
I
H
B
BB
ECDAFFADCE
A
C
D
E
F
H
G
130
340
G
G
G
50
C
BBC
B
C
F
90 105 112
45
55
Suction tubing Discharge tubing Liquid tubing
Thermal insulation Thermal insulation
Thermal insulation
Unit: mm
Example: (F below indicates inner diameter. below indicates outer diameter.)
Thermal insulation Thermal insulation
IHIH
I
H
GFEEFG
E
F
G
CC
D
E
DEF
F
C
D
C
F
E
D
DEF DEF EF
G
H
G
50340
130
G
G
G
C
300
C
112
D
D
300
230
230
12616
C
C
F
55
74
112
126
16
F
55
Thermal insulation Thermal insulation
Thermal insulation
Suction tubing Discharge tubing Liquid tubing
Example: (C below indicates inner diameter. below indicates outer diameter.)
Example: (B below indicates inner diameter. below indicates outer diameter.)
Suction tubing • Discharge tubing Liquid tubing
Unit: mm
Unit: mm
Unit: mm
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1-14. Optional Solenoid Valve Kit
CZ-P56HR2
Part
number Types and specifications of tubing connections
1Gas tube: ø12.7
2Liquid tube: ø6.35
3Suspension hook
4Liquid tube: ø9.52
5Suction tube: ø15.88
6Discharge tube: ø12.7
7Earth (M5 with washer)
8Service panel
9Power outlet (connected to a 5 m cabtyre cable with
connector)
Unit: mm
79
239
147
240
149
216
108
21
17
11
28
150150
76
8
36
5
4
2
1
50
166
37 38
27
4451
• Specifications
CZ-P56HR2
Compatibility 2.2 ≤ Total capacity of indoor units (kW) ≤5.6
Power source
Single-phase 200V 50/60Hz (supplied by indoor units)
Power input 20 W
Net weight 4.3 kg
Accessories
Flat washer ×2
Insulating tape
PCB connector ×1
Unit: mm
NOTE
Notes on Installation
• Be sure to secure the valve body by using its structure with
the suspension bolt, etc.
• Install the valve body within a distance of 30 m from the
indoor unit.
Some refrigerant noise will be produced. Therefore in
hospitals, libraries, hotel guest rooms, and other quiet
locations, it is recommended that the solenoid valve kit be
installed on the ceiling reverse side of a hallway or another
location separated from the room.
• When installing the valve body, install with the top surface
facing up. Secure 200 mm or more of space to the front so
that the front service panel can be removed.
• If the supplied suspension hook will not be used, and other
fastening devices will be attached in the field, use the 4 screw
holes on the top surface. DO NOT use any long screws other
than the supplied screws. Use of other screws may puncture
the internal tubing, resulting in refrigerant leakage.
• Do not block the air holes.
Gas tube
Liquid tube
Suction tube
Liquid
tube
Discharge
tube
Cool with damp cloth or other means when
brazing the joint with a torch. Otherwise, the
solenoid valve will be damaged.
Suspension bolt (M10 or 3/8") (field supply)
Suspension hook
Washer Nut (field supply)
(M10 or 3/8")
M4 screws (12 pcs.)
How to use suspension hook
Front side
Service space
More than
200 mm
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CZ-P160HR2
Part
number Types and specifications of tubing connections
1Gas tube: ø15.88
2Liquid tube: ø9.52
3Suspension hook
4Liquid tube: ø9.52
5Suction tube: ø15.88
6Discharge tube: ø12.7
7Earth (M5 with washer)
8Service panel
9Power outlet (connected to a 5 m cabtyre cable with
connector)
Unit: mm
147
239
166
27
37 38
51 44
7621
150
11
28
17
150
108
240
149
216
7
2
1
3
6
5
4
8
9
• Specifications
CZ-P160HR2
Compatibility
5.6 < Total capacity of indoor units (kW)
≤
16.0
Power source
Single-phase 200V 50/60Hz (supplied by indoor units)
Power input 25 W
Net weight 4.7 kg
Accessories
Washer ×2
Insulating tape
PCB connector ×1
Unit: mm
NOTE
Notes on Installation
• Be sure to secure the valve body by using its structure with
the suspension bolt, etc.
• Install the valve body within a distance of 30 m from the
indoor unit.
Some refrigerant noise will be produced. Therefore in
hospitals, libraries, hotel guest rooms, and other quiet
locations, it is recommended that the solenoid valve kit be
installed on the ceiling reverse side of a hallway or another
location separated from the room.
• When installing the valve body, install with the top surface
facing up. Secure 200 mm or more of space to the front so
that the front service panel can be removed.
• If the supplied suspension hook will not be used, and other
fastening devices will be attached in the field, use the 4 screw
holes on the top surface. DO NOT use any long screws other
than the supplied screws. Use of other screws may puncture
the internal tubing, resulting in refrigerant leakage.
• Do not block the air holes.
Gas tube
Liquid tube
Suction tube
Liquid tube
Discharge
tube
Suspension bolt (M10 or 3/8") (field supply)
Suspension hook
Washer Nut (field supply)
(M10 or 3/8")
M4 screws (12 pcs.)
How to use suspension hook
Front side
Service space
More than
200 mm
Cool with damp cloth or other means when
brazing the joint with a torch. Otherwise, the
solenoid valve will be damaged.
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1-15. Example of Tubing Size Selection and
Refrigerant Charge Amount
Additional refrigerant charging
Based on the values in Tables 1-3, 4, 5, 6, 9-1 and 9-2, use
the liquid tubing size and length, and calculate the amount of
additional refrigerant charge using the formula below.
Required additional
refrigerant charge (kg)
= [366 ×(a) + 259 ×(b) + 185 ×(c) +
128 ×(d) + 56 ×(e) + 26 ×(f)] ×10–3
+ Necessary amount of additional
refrigerant charge per outdoor unit
(a): Liquid tubing Total length of ø22.22 (m)
(b): Liquid tubing Total length of ø19.05 (m)
(c): Liquid tubing Total length of ø15.88 (m)
(d): Liquid tubing Total length of ø12.7 (m)
(e): Liquid tubing Total length of ø9.52 (m)
(f) : Liquid tubing Total length of ø6.35 (m)
●Charging procedure
Be sure to charge with R410A refrigerant in liquid form.
1. After performing a vacuum, charge with refrigerant from
the liquid tubing side. At this time, all valves must be in the
“fully closed” position.
2. If it was not possible to charge the designated amount,
operate the system in Cooling mode while charging with
refrigerant from the gas tubing side. (This is performed at
the time of the test run. For this, all valves must be in the
“fully open” position.)
Charge with R410A refrigerant in liquid form.
With R410A refrigerant, charge while adjusting the
amount being fed a little at a time in order to prevent liquid
refrigerant from backing up.
●After charging is completed, turn all valves to the “fully open”
position.
●Replace the tubing covers as they were before.
CAUTION
1. R410A additional charging absolutely must be done through
liquid charging.
2. The R410A refrigerant cylinder has a gray base color, and the
top part is pink.
3. The R410A refrigerant cylinder includes a siphon tube. Check
that the siphon tube is present. (This is indicated on the label at
the top of the cylinder.)
4. Due to differences in the refrigerant, pressure, and refrigerant oil
involved in installation, it is not possible in some cases to use
the same tools for R22 and for R410A.
Example:
1 23 4 56 7
LO LA
LB LC LD LE LF
A
B
C
●Example of each tubing length
Main tubing Distribution joint tubing
LO = 2 m LD = 15 m
Outdoor side
Indoor side
LA = 40 m LE = 10 m A = 2 m 1 = 30 m 5 = 2 m
LB = 5 m LF = 10 m B = 2 m 2 = 5 m 6 = 6 m
LC = 5 m C = 3 m 3 = 5 m 7 = 5 m
4 = 5 m
●Obtain liquid tubing size from Tables 1-3, 4, 5, 6 and 9-1.
Main tubing
LO = ø15.88 m (Total capacity of outdoor unit is 56.0 kW)
LA = ø19.05 m (Total capacity of outdoor unit is 96.0 kW)
LB = ø19.05 m (Total capacity of indoor unit is 77.9 kW)
LC = ø15.88 m (Total capacity of indoor unit is 67.3 kW)
LD = ø15.88 m (Total capacity of indoor unit is 53.3 kW)
LE = ø12.7 m (Total capacity of indoor unit is 37.3 kW)
LF = ø9.52 m (Total capacity of indoor unit is 21.3 kW)
The longest main tubing length in this example
(LM = 40 + 5 = 45 m)
160
model 106
model 140
model 160
model 160
model 73
model 140
model
10HP
model 10HP
model 14HP
model
Solenoid valve kit
Outdoor unit
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Distribution joint tubing
Outdoor side A: ø12.7 B: ø9.52 C: ø9.52
(from outdoor unit connection tubing)
Indoor side 1: ø9.52 2: ø9.52 3: ø9.52 4: ø9.52
5: ø9.52 6: ø9.52 7: ø9.52
(from indoor unit connection tubing)
●Obtain additional charge amount.
Note 1:
The charge amounts per 1 meter are different for each liquid
tubing size.
ø19.05 →LA + LB : 45 m × 0.259 kg/m = 11.655
ø15.88 →LO + LC + LD : 22 m × 0.185 kg/m = 4.07
ø12.7 →LE + A: 12 m × 0.128 kg/m = 1.536
ø9.52 →LF + B – C + 1 – 7
: 73 m × 0.056 kg/m = 4.088
Total 21.349 kg
Additional refrigerant charge amount is 21.349 kg.
Note 2:
Necessary amount of additional refrigerant charge per outdoor
unit (U-14MF1E8) is 3.2kg. (See the Table 1-9-2.)
Note 1) Amount of additional charge per tubing length
: 21.349kg
Note 2) Amount of additional charge per outdoor unit
: 3.2 kg
Total of additional refrigerant charge amount : 24.549kg
Therefore, the total of additional refrigerant charge amount
reaches 24.549kg.
●Obtain overall refrigerant charge amount.
Overall refrigerant charge amount of the system indicates
the calculated value shown above the additional charge
amount in addition to the total of the refrigerant charge
amount (shown in the Table 1-10) at the shipment of each
outdoor unit.
Refrigerant charge amount at shipment:
U-10MF1E8 : 11.8 kg
U-10MF1E8 : 11.8 kg
U-14MF1E8 : 11.8 kg
Additional charge amount : 24.549 kg
Grand total : 59.949kg
Therefore, overall refrigerant charge amount of the system
reaches 59.949kg.
CAUTION
Be sure to check the limit density for the room in which the
indoor unit is installed.
Checking of limit density
Density limit is determined on the basis of the size of a room
using an indoor unit of minimum capacity. For instance, when
an indoor unit is used in a room (floor area 15 m3×ceiling
height 2.7 m = room volume 40.5 m3), the graph below shows
that the minimum room volume should be 199.8 m3(floor area
74.0 m2) for refrigerant of 59.949 kg. Accordingly, openings
such as louvers are required for this room.
<Determination by calculation>
Overall refrigerant charge amount for the air conditioner: kg
(Minimum room volume for indoor unit: m3)
=59.949 (kg) = 1.48 (kg/m3) > 0.3 (kg/m3)
40.5 (m3)
Therefore, openings such as louvers are required for this room.
40.5
54.0
27.0
13.5
0.0 20100 3040 6070809010050
67.5
81.0
94.5
108.0
121.5
135.0
148.5
162.0
175.5
189.0
202.5
216.0
229.5
243.0
256.0
270.0
m2m3
15
10
5
0
20
25
30
35
40
45
50
55
60
65
70
75
80
85
90
95
100
105
110
115
120
125
283.5
297.0
310.5
324.0
337.5
kg
2. SELECTING THE INSTALLATION SITE
2-1. Outdoor Unit
AVOID:
●heat sources, exhaust fans, etc. (Fig. 2-1)
●damp, humid or uneven locations
●indoors (no-ventilation location)
DO:
●choose a place as cool as possible.
●choose a place that is well ventilated.
●allow enough room around the unit for air intake/
exhaust and possible maintenance. (Fig. 2-2)
Fig. 2-1
Installation space
Install the outdoor unit where there is enough space for
ventilation. Otherwise the unit may not operate properly. Fig. 2-2
shows the minimum space requirement around the outdoor units
when 3 sides are open and only 1 side is shuttered, with open
space above the unit. The mounting base should be concrete
or a similar material that allows for adequate drainage. Make
provisions for anchor bolts, platform height, and other site-
specific installation requirements.
Range below the
density limit of
0.3 kg/m³
(Countermeasures
not needed)
Range above the
density limit of 0.3
kg/m³
(Countermeasures
needed)
Total amount of refrigerant
Min. indoor volume
Min. indoor floor area
(when the ceiling is 2.7 m high)
Exhaust fan
Hot air
Heat source
Out-
door
unit
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Fig. 2-2
CAUTION
●Leave space open above the unit.
●Construct louvers or other openings in the wall, if
necessary, to ensure adequate ventilation.
Fig. 2-3
NOTE
●Do not do any wiring or tubing within 300 mm of the front
panel, because this space is needed as a servicing space for
the compressor.
●Ensure a base height of 100 mm or more to ensure that
drainage water does not accumulate and freeze around the
bottom of the unit.
●If installing a drain pan, install the drain pan prior to installing
the outdoor unit.
* Make sure there is at least 150 mm between the outdoor unit
and the ground.
Also, the direction of the tubing and electrical wiring should
be from the front of the outdoor unit.
2-2. Shield for Horizontal Exhaust Discharge
It is necessary to install an air-discharge chamber (field supply)
to direct exhaust from the fan horizontally if it is difficult to
provide a minimum space of 2 m between the air-discharge
outlet and a nearby obstacle. (Fig. 2-4)
Fig. 2-4
CAUTION
In regions with heavy snowfall, the outdoor unit should
be provided with a solid, raised platform and snow-proof
vents. (Fig. 2-5)
Fig. 2-5
890 (Ceiling panel dimensions)
790 (Installation hole pitch)
890 (Ceiling panel dimensions)
790 (Installation hole pitch)
890 (Ceiling panel dimensions)
790 (Installation hole pitch)
2870 (Ceiling panel dimensions)
950 (Maximum dimensions)
920 (Installation pitch)
890 (Ceiling panel dimensions)
2770 (Installation hole pitch)
AVOID
DO
With snow-proof
vents
(High platform)
Without snow-
proof vents
(Low platform)
Fallen snow
Top view
* More than 100 mm
* However, be sure to ensure a space of 300 mm or
more at either the right side or the rear of the unit.
* More than
50 mm * More than
500 mm
* More than 100 mm
* More than 100 mm
Example of installation of 2 units
(When wall height is below 1800 mm)
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2-3. Installing the Outdoor Unit in Heavy Snow Areas
In locations where wind-blown snow can be a problem, snow-
proof vents should be fitted to the unit and direct exposure to
the wind should be avoided as much as possible. (Fig. 2-6) The
following problems may occur if proper countermeasures are
not taken:
●The fan in the outdoor unit may stop running, causing the
unit to be damaged.
●There may be no air flow.
●The tubing may freeze and burst.
●The condenser pressure may drop because of strong wind,
and the indoor unit may freeze.
Fig. 2-6
2-4. Precautions for Installation in Heavy Snow Areas
a) The platform should be higher than the max. snow depth.
(Fig. 2-5)
b) The 2 anchoring feet of the outdoor unit should be used for
the platform, and the platform should be installed beneath
the air intake side of the outdoor unit.
c) The platform foundation must be solid and the unit must be
secured with anchor bolts.
d) When installing on a roof subject to strong wind,
countermeasures must be taken to prevent the unit from
being overturned.
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1106 1106
(216) 890 890
844
890
895
(893)
2564
1671
(893)
2564
1671
24 24
(216)
844
890
895
Unit: mm
Unit: mm
3-unit installation
Note: Can be installed so that the air direction is to the front, right, left or rear direction.
2-5. Dimensions of Wind Ducting
Reference diagram for air-discharge chamber (field supply)
Ceiling panel
Air direction: Front direction Air direction: Right direction
Ceiling panel
(Ceiling panel dimensions)
(Maximum bracket dimensions) (Ceiling panel dimensions)
(Ceiling panel
dimensions)
Front view Right side view Right side view Front view
(Ceiling panel dimensions)
(Maximum bracket dimensions)
Top view
(3-unit installation: maximum dimensions)
(2-unit installation: maximum dimensions)
(Installation hole pitch)(Installation hole pitch)(Installation hole pitch)
Front view
(Ceiling panel dimensions)
(Installation hole pitch)
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23
890
803
410 410
410410410 410
844
890
890
890
(1710)
803
803
11061106
2424
(893)
2554
1671
918
918
1064
1064
1710
803
803
803
844
803
1710
410410
(1710)
STK-DR280A
STK-BDR280A
803
890
790 790 790
890 890
100 100
200 200
2870
890
803
803 1054
1064
918
918
920
950
410
1106
410
24
890
3691
2564
1064
918
1671
(893)
Unit: mm
Unit: mm
3-unit installation
Note: Can be installed so that the air direction is to the front, right, left or rear direction.
2-6. Dimensions of Snow Ducting
Reference diagram for snow-proof vents (field supply)
Ceiling panel
Air direction: Front direction example Air direction: Right direction example
Ceiling panel
(Ceiling panel dimensions)
(Air intake duct)
(Ceiling panel
dimensions)
Front view Right side view Right side view
Front view
(Ceiling panel dimensions)
(Ceiling panel dimensions)
Front view
(Air outlet duct)
(Air intake duct)
(Air outlet duct)
(Ceiling panel
dimensions)
Right side view
Ceiling panel
Top (Before installation of snowfall protection duct)
(1 pc.)
(4 pcs.)
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3. HOW TO INSTALL THE OUTDOOR UNIT
3-1. Transporting
When transporting the unit, have it delivered as close to the
installation site as possible without unpacking.
Use a hook for suspending the unit. (Fig. 3-1)
Fig. 3-1
CAUTION
●When hoisting the outdoor unit, pass ropes or straps under
the bottom plate as shown in the figure above. When hoisting,
the angle between the rope and top panel must be 70° or
greater so that the rope does not come into contact with the
fan guard. (Use 2 lengths of rope 7.5 meters long or longer.)
●When passing the ropes through the square holes of the
bottom plate:
Place the rope in the outer edge of the square holes.
●Use protective panels or padding at all locations where the
rope contacts the outer casing or other parts to prevent
scratching. In particular, use protective material (such as
cloth or cardboard) to prevent the edges of the top panel from
being scratched.
●Be careful of the fan.
There is danger of injury if the fan starts to turn during
inspection. Be sure to turn OFF the remote power switch
before beginning inspection.
3-2. Installing the Outdoor Unit
(1) Use anchor bolts (M12) or similar to securely anchor the
unit in place. (Fig. 3-2)
(100)
(100)
88
20
50
The vibration insulator, base, or platform must be large enough
to bear the full surface of the base plate legs.
Fig. 3-2
(2) Be sure the rubber vibration insulator and platform extend
to the inside of the legs. In addition, the washers used
to anchor the unit from the top must be larger than the
installation anchor holes. (Figs. 3-2 and 3-3)
38.5
15
50
Fig. 3-3
Fig. 3-4
(Detailed view of legs)
4 – 15 ×20 hole
Surface where
installation anchor
brackets are installed
Unit: mm
Vibration insulator
Base
Washer
Plate leg
Anchor bolts
Unit: mm
(B)
(F)
Top view
Top view
(A)
(B)
890 (Ceiling panel dimensions)
790 (Installation hole pitch)
890 (Ceiling panel dimensions)
920 (Installation hole pitch)
950 (Maximum dimensions)
(Positions where anchor bolts are fastened)
Installation anchor hole (4 – 15 × 20 oval holes)
Unit: mm
(A)
2870
(D)
2770 (Installation hole pitch)
(B)
890 (Ceiling panel dimensions)
(E) 920 (Installation pitch)
(C) 790 (Installation hole pitch) (F) 950 (Maximum dimensions)
(A)
(B) (B)
(C) (C) (C)
(D)
(E)
(B)
(A)
1880 (Ceiling panel dimensions)
(D)
1780 (Installation hole pitch)
(B)
890 (Ceiling panel dimensions)
(E) 920 (Installation pitch)
(C) 790 (Installation hole pitch) (F) 950 (Maximum dimensions)
(B)
(C) (C)
(D)
(F)
(E)
(B)
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●When cutting the tubing, use a tube cutter, and be sure to
remove any burrs.
(The same applies to distribution tubing (optional).)
●When bending the tubes, bend each tube using a radius that
is at least 4 times the outer diameter of the tube.
When bending, use sufficient care to avoid crushing or
damaging the tube.
●For flaring, use a flare tool, and be sure that flaring is
performed correctly.
CAUTION
●Use sufficient caution during preparation of the tubing.
Seal the tube ends by means of caps or taping to
prevent dust, moisture, or other foreign substances
from entering the tubes.
3-5. Connect the Tubing
●Except for 8HP type, use the supplied connector tubing.
(See figure below.)
Refrigerant tubing Connection
method
Use supplied
connector tube?
1Suction tube
Brazed connection
No
2Discharge tube
Brazed connection
No
3Liquid tube
Brazed connection
No
4Balance tube
Flared connection
No
Refrigerant tubing Connection
method
Use supplied
connector tube?
1Suction tube
Brazed connection
Yes (ø19.05→ø22.22)
2Discharge tube
Brazed connection
Yes (ø15.88→ø19.05)
3Liquid tube
Brazed connection
No
4Balance tube
Flared connection
No
8HP type
10HP type
3-3. Routing the Tubing
●The tubing can be routed out either from the front or from the
bottom. (Fig. 3-5)
●The connecting valve is contained inside the unit. Therefore,
remove the front panel. (Fig. 3-5)
(1) If the tubing is routed out from the front, use cutting pliers or
a similar tool to cut out the tubing outlet slit (part indicated
by ) from the tubing cover. (Figs. 3-5 and 3-6)
Fig. 3-5
(2) If the tubing is routed out from the bottom, remove the slit
part ( ).
●Use a drill bit approximately 5 mm dia. to create holes at the
4 slit hole indentations (openings).
●Punch out the slit part ( ).
●Be careful not to damage the base plate.
Fig. 3-6
3-4. Prepare the Tubing
●Material: Use C1220 phosphorous deoxidized copper
as described in JIS H3300, “Copper and Copper Alloy
Seamless Pipes and Tubes.”
(For tubes that are ø25.4 or larger, use 1/2H material or H
material. For all others use O material.)
●Tubing size
Use the tubing size indicated in the following table.
Refrigerant tubing (Existing tubing can be used.)
Tubing size (mm)
Outer dia. Thickness Outer dia. Thickness
ø6.35 t0.8 ø25.4 t1.0
ø9.52 t0.8 ø28.58 t1.0
ø12.7 t0.8 ø31.8 t1.1
ø15.88 t1.0 ø38.1 t1.15
ø19.05 t1.0 ø41.28 t1.2
ø22.22 t1.15
Remove
11 panel
screws from
front panel
Use cutting pliers or similar
tool to cut cover out
Front
Bottom
Remove 2 screws
Tubing cover
Indentation
(4 locations) Slit hole
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Refrigerant tubing Connection
method
Use supplied
connector tube?
1Suction tube
Brazed connection
Yes (ø19.05→ø25.4)
2Discharge tube
Brazed connection
Yes (ø15.88→ø19.05)
3Liquid tube
Brazed connection
Yes (ø9.52→ø12.7)
4Balance tube
Flared connection
No
Refrigerant tubing Connection
method
Use supplied
connector tube?
1Suction tube
Brazed connection
No
2Discharge tube
Brazed connection
Yes (ø19.05→ø22.22)
3Liquid tube
Brazed connection
No
4Balance tube
Flared connection
No
Refrigerant tubing Connection
method
Use supplied
connector tube?
1Suction tube
Brazed connection
Yes (ø25.4→ø28.58)
2Discharge tube
Brazed connection
Yes (ø19.05→ø22.22)
3Liquid tube
Brazed connection
No
4Balance tube
Flared connection
No
14HP type
16HP type
Refrigerant tube port:
●Use caulking, putty, or a similar material to fill any gaps at
the refrigerant tube port ( ) in order to prevent rainwater,
dust or foreign substances from entering the unit.
* Perform this work even if the tubing is routed out in a
downward direction.
●Tighten each cap as specified below.
Tightening torque for each cap
Service port cap
(width 15 mm) 7 – 12 N · m (70 – 120 kgf · cm)
Valve cap
(width 22 mm) 20 – 25 N · m (200 – 250 kgf · cm)
Flare nut
(valve dia. ø9.52) 34 – 42 N · m (340 – 420 kgf · cm)
●Precautions for brazing
Be sure to replace the air inside the tube with nitrogen to
prevent oxide film from forming during the brazing process.
Be sure to use a damp cloth or other means to cool the valve
unit during brazing.
CAUTION
1. Be sure to use nitrogen. (Oxygen, CO2, and CFC must not
be used.)
2. Use a pressure-reducing valve on the nitrogen tank.
3. Do not use agents intended to prevent the formation of oxide
film. They will adversely affect the refrigeration oil, and may
cause equipment failure.
4. The balance tube is not used if only 1 outdoor unit is
installed.
Use the unit in the same conditions as when it was shipped
from the factory.
Base plate
Tubing
cover
Tubing routed out forward Tubing routed out downward
Valve cap
Flare nut
Service port cap
Brazing locations
Field-supply tube Remote valve
Taping
Pressure-
reducing
valve
(regulator)
Work method
Nitrogen
12HP type
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4. ELECTRICAL WIRING
4-1. General Precautions on Wiring
(1) Before wiring, confirm the rated voltage of the unit as
shown on its nameplate, then carry out the wiring closely
following the wiring diagram.
(2) Provide a power outlet to be used exclusively for each
unit, and a power supply disconnect and circuit breaker for
overcurrent protection should be provided in the exclusive
line.
(3) To prevent possible hazards from insulation failure, the unit
must be grounded.
(4) Each wiring connection must be done in accordance with
the wiring system diagram. Wrong wiring may cause the
unit to misoperate or become damaged.
(5) Do not allow wiring to touch the refrigerant tubing,
compressor, or any moving parts of the fan.
(6) Unauthorized changes in the internal wiring can be very
dangerous. The manufacturer will accept no responsibility
for any damage or misoperation that occurs as a result of
such unauthorized changes.
(7) Regulations on wire diameters differ from locality to
locality. For field wiring rules, please refer to your LOCAL
ELECTRICAL CODES before beginning.
You must ensure that installation complies with all relevant
rules and regulations.
(8) To prevent malfunction of the air conditioner caused by
electrical noise, care must be taken when wiring as follows:
●The remote control wiring and the inter-unit control wiring
should be wired apart from the inter-unit power wiring.
●Use shielded wires for inter-unit control wiring between units
and ground the shield on both sides.
(9) If the power supply cord of this appliance is damaged,
it must be replaced by a repair shop appointed by the
manufacturer, because special purpose tools are required.
4-2. Recommended Wire Length and Wire Diameter
for Power Supply System
Outdoor unit
(A) Power supply Time delay
fuse or circuit
capacity
Wire size Max. length
U-8MF1E8 6 mm292 m 30 A
U-10MF1E8 6 mm270 m 35 A
U-12MF1E8 6 mm257 m 40 A
U-14MF1E8 10 mm279 m 40 A
U-16MF1E8 10 mm268 m 50 A
or
(A) Power supply Time delay
fuse or circuit
capacity
Wire size Max. length
U-8MF1E8 6 mm292 m 35 A
U-10MF1E8 6 mm270 m 35 A
U-12MF1E8 10 mm295 m 50 A
U-14MF1E8 10 mm279 m 50 A
U-16MF1E8 10 mm268 m 50 A
Indoor unit
Type (B) Power supply Time delay fuse or
circuit capacity
2.5 mm2
K1 Max. 150 m 10 – 16 A
D1, L1, U1, Y1, T1, F1, M1,
P1, R1 Max. 130 m 10 – 16 A
E1 (73, 106, 140) Max. 60 m 10 – 16 A
E1 (224) Max. 50 m 10 – 16 A
E1 (280) Max. 30 m 10 – 16 A
Control wiring
(C)
Inter-unit (between outdoor and
indoor units) control wiring
(D) Remote control wiring
0.75 mm2 (AWG #18)
Use shielded wiring*10.75 mm2 (AWG #18)
Max. 1,000 m Max. 500 m
(E)
Control wiring for group control
(F)
Inter-outdoor unit control wiring
0.75 mm2 (AWG #18) 0.75 mm2 (AWG #18)
Use shielded wiring
Max. 200 m (Total) Max. 300 m
NOTE
*1 With ring-type wire terminal.
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4-3. Wiring System Diagram
NOTE
(1) Refer to Section 4-2. “Recommended Wire Length
and Wire Diameter for Power Supply System” for the
explanation of “A”, “B”, “C”, “D”, “E” and “F” in the above
diagrams.
(2) The basic connection diagram of the indoor unit shows
the 7P terminal board, so the terminal boards in your
equipment may differ from the diagram.
(3) Refrigerant Circuit (R.C.) address should be set before
turning the power on.
(4) Regarding the R.C. address setting, refer to page 41.
Address setting can be executed by remote controller
automatically.
Refer to Section 7-4. “Auto Address Setting”.
4P terminal board
Inter-outdoor unit
control wiring
Inter-unit
control wiring
L1 L2 L3 N
5P terminal board
Power supply
MF1 Type
U2
U1
R2
R1
L
N
R2
R1
R2
R1
R2
R1
2
1
2
1
U2
U1
L
N
U2
U1
L
N
U2
U1
L
N
2
1
2
1
2
1
D
E
C
B
L
N
L
N
L
N
L
N
2
1
B
B
B
C
D
D
C
4
3
AL1
L2
L3
N
4
3
AL1
L2
L3
N
F
CL1
L2
L3
N
L1
L2
L3
N
1
2
Power supply
220 – 240V ~50/60Hz
Remote
controller
Remote
controller
Remote
controller
WHT
BLK
WHT
BLK
WHT
BLK
Power supply
220 – 240V ~50/60Hz
Power supply
220 – 240V ~50/60Hz
Power supply
220 – 240V ~50/60Hz
Ground
Ground
Ground
Ground
Ground
Ground
Inter-outdoor-unit control wiring
Ground
Ground Ground
Outdoor unit
INV unit
Power supply
380 – 415V, 3 N~, 50Hz
Power supply
380 – 415V, 3 N~, 50Hz
Outdoor unit
INV unit
Ground
Ground
Ground
Ground
Ground
Ground
Indoor unit
(No. 1)
Indoor unit
(No. 2)
Indoor unit
(No. n)
Indoor unit
(No. 3)
Group control:
1234
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CAUTION
(1) When linking outdoor units in a network, disconnect the terminal extended from the short plug (CN003, 2P Black, location:
right bottom on the outdoor main control PCB) from all outdoor units except any one of the outdoor units.
(When shipping: In shorted condition)
For a system without link (no connection wiring between outdoor units), do not remove the short plug.
(2) Do not install the inter-unit control wiring in a way that forms a loop. (Fig. 4-1)
Fig. 4-1
(3) Do not install inter-unit control wiring such as star branch wiring. Star branch wiring causes mis-address setting.
Fig. 4-2
(4) If branching the inter-unit control wiring, the number of branch points should be 16 or fewer.
(Branches less than 1 m are not included in the total branch number.) (Fig. 4-3)
Fig. 4-3
Outdoor unit Outdoor unit Outdoor unit
Indoor unit Indoor unit Indoor unit Indoor unit
Prohibited
Prohibited
Indoor unit
Outdoor unit Indoor unitIndoor unit
Indoor unitIndoor unit
NO
Branch point
Outdoor unit Outdoor unit Outdoor unit
Indoor unit Indoor unit Indoor unit Indoor unit
Indoor unitIndoor unit Indoor unit Indoor unit
Indoor unit
more than 1 m
Indoor unit
more than 1 m
less than 1 m
Branch
Point
16 or fewer
(5) Use shielded wires for inter-unit control wiring (c)
and ground the shield on both sides, otherwise
misoperation from noise may occur. (Fig. 4-4)
Connect wiring as shown in Section “4-3. Wiring System
Diagram”.
Fig. 4-4
(6) Use the standard power supply cables for Europe (such
as H05RN-F or H07RN-F which conform to CENELEC
(HAR) rating specifications) or use the cables based on
IEC standard. (245 IEC57, 245 IEC66)
WARNING
Loose wiring may cause the terminal to overheat or result
in unit malfunction. A fire hazard may also occur. Therefore,
ensure that all wiring is tightly connected.
When connecting each power wire to the terminal, follow the
instructions on “How to connect wiring to the terminal” and
fasten the wire securely with the fixing screw of the terminal
plate.
Shielded wire
Ground Ground
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4-4. Connecting multiple indoor units to a single solenoid valve kit
●It is possible to connect plural number of indoor units to one solenoid valve kit. The indoor units can be controlled individually or be
operated as a group.
●It is possible to adopt plural number of units with a common use of the solenoid valve kit per piece of refrigerant.
●Categories of connected indoor unit capacities are determined by the solenoid valve kit.
Type of solenoid valve kit Total capacity of indoor units (kW)
CZ-P160HR2 5.6 < Total capacity 16.0
CZ-P56HR2 2.2 Total capacity 5.6
* If the capacity range is exceeded, use two solenoid valves connected in parallel.
Each Method (General) and Conditions
Method 1 Method 2 Method 3
Method Connecting one indoor unit with one
solenoid valve kit
Group control is possible by
connecting plural number of indoor
units to one solenoid valve kit.
Indoor units can operate individually
by connecting plural number of indoor
units to one solenoid valve kit.
Connectable number of
remote controls 1 piece 1 piece Over 2 pieces
Possible operating
functions
Individual control Group control
* Thermostat On/Off function is only
individual control (when selecting the
body thermostat).
Individual control available
* Mixed group control available
Possible operating
modes Cool, Dry, Heating, Auto, Fan Cool, Dry, Heating, Auto, Fan Cooling, Dry, Heating, Fan
* Auto selection is impossible.
Condition –• Mixed cooling and heating is
impossible.
• Mixed cooling and heating is
impossible.
• Auto selection is impossible.
Method 1
Indoor unit
Method 1
Indoor unit Indoor unit
Method 2
Indoor unit
Method 3
Indoor unit Indoor unit Indoor unit
Method 3
Indoor unit Indoor unit Indoor unit
Solenoid
valve kit
Remote
controller
Solenoid
valve kit
Remote
controller
Solenoid
valve kit
Solenoid
valve kit
Remote
controller
Indoor unit
Solenoid
valve kit
Remote
controller
Remote
controller
Solenoid
valve kit
Remote
controller
Remote
controller
Remote
controller
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Necessity of setting changes by combination of each method
Type of combination: Necessity of setting
Method 1 only: Setting is unnecessary.
Method 2 included: Setting up in common use of a solenoid valve kit from “Remote Control” is necessary. *1
* Method 2 only is set.
* Method 3 excluded
Method 3 included: Setting up in common use of a solenoid valve kit from “Remote Control” is necessary. *1
* Setting all connected indoor units
*1: Refer to “Test Run” for setting instructions.
Please note the following system example is prohibited and avoid the following connection.
System 1
Solenoid
valve kit
Indoor unit
Remote
controller
System 2
Solenoid
valve kit
Indoor unit
Remote
controller
Indoor unit
Remote
controller
Indoor unit
Remote
controller
Indoor unit
Remote
controller
Solenoid
valve kit
Method 3 individual control
is possible and group wiring
should be made by other
solenoid valve kit.
Group wiring should be made
by different type of refrigerant.
Solenoid
valve kit
Indoor unit
Indoor unit
Stranded wire
Ring
pressure
terminal
Screw and
Special washer
Ring
pressure
terminal
Terminal plate
Ring pressure
terminal
Screw
Special
washer
Wire
Wire
Strip 10 mm
Fig. 4-5 Fig. 4-6
How to connect wiring to the terminal
■For stranded wiring
(1) Cut the wire end with cutting pliers,
then strip the insulation to expose
the stranded wiring about 10 mm and
tightly twist the wire ends. (Fig. 4-5)
(2) Using a Phillips head screwdriver,
remove the terminal screw(s) on the
terminal plate.
(3) Using a ring connector fastener or
pliers, securely clamp each stripped
wire end with a ring pressure terminal.
(4) Place the ring pressure terminal,
and replace and tighten the removed
terminal screw using a screwdriver.
(Fig. 4-6)
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Insulation tape
8mm
Insulation tape
Shield mesh
Shield mesh
Fig. 4-7
Fig. 4-8
Fig. 4-9
Fig. 4-10
■Examples of shield wires
(1) Remove cable coat not to scratch braided shield. (Fig. 4-7)
(2) Unbraid the braided shield carefully and twist the
unbraided shield wires tightly together. Insulate the shield
wires by covering them with an insulation tube or wrapping
insulation tape around them. (Fig. 4-8)
(3) Remove coat of signal wire. (Fig. 4-9)
(4) Attach ring pressure terminals to the signal wires and the
shield wires insulated in Step (2). (Fig. 4-10)
■Wiring sample
1. 2.
3. 4.
* First remove the attached resin fixture.
Then lead the clamper (field supply) through the screw hole and
square hole from top to bottom or vice versa.
* Remove the attached resin fixture.
Then lead the clamper (field supply) through the screw
hole and fix the power supply wire.
Inter-unit Control Wiring
Inter-unit Control Wiring
Inter-unit Control Wiring
Inter-unit Control Wiring
Inter-outdoor unit
Control Wiring
Clamper *
(Field supply)
Clamper *
(Field supply)
Clamper *
(Field supply) Earth
Earth
Earth
Earth
Power Supply
Power Supply
Power Supply
Power Supply
Finally fix each inter-outdoor unit control wire and the inter-unit
control wire separately with the clamper (field supply).
Use this screw when
connecting to ground
for the inter-outdoor
unit control wiring.
Use this screw when
connecting to ground
for the unit inter-unit
control wiring.
Use this screw when connecting
to ground for the unit inter-unit
control wiring.
Use this screw when connecting
to ground for the unit inter-unit
control wiring.
Use this screw when connecting
to ground for the unit inter-unit
control wiring.
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NOTE
A good flare should have the following characteristics:
●inside surface is glossy and smooth
●edge is smooth
●tapered sides are of uniform length
Caution Before Connecting Tubes Tightly
(1) Apply a sealing cap or water-proof tape to prevent dust or
water from entering the tubes before they are used.
(2) Be sure to apply refrigerant lubricant (ether oil) to the
inside of the flare nut before making piping connections.
This is effective for reducing gas leaks. (Fig. 5-4)
Fig. 5-4
(3) For proper connection, align the union tube and flare tube
straight with each other, then screw in the flare nut lightly
at first to obtain a smooth match. (Fig. 5-5)
Fig. 5-5
●Adjust the shape of the liquid tube using a tube bender at the
installation site and connect it to the liquid tubing side valve
using a flare.
Cautions During Brazing
●Replace air inside the tube with nitrogen gas to prevent
copper oxide film from forming during the brazing
process. (Oxygen, carbon dioxide and Freon are not
acceptable.)
●Do not allow the tubing to get too hot during brazing.
The nitrogen gas inside the tubing may overheat,
causing refrigerant system valves to become damaged.
Therefore allow the tubing to cool when brazing.
●Use a reducing valve for the nitrogen cylinder.
●Do not use agents intended to prevent the formation
of oxide film. These agents adversely affect the
refrigerant and refrigerant oil, and may cause damage or
malfunctions.
5. HOW TO PROCESS TUBING
The liquid tubing side is connected by a flare nut, and the gas
tubing side is connected by brazing.
5-1. Connecting the Refrigerant Tubing
Use of the Flaring Method
Many of conventional split system air conditioners employ the
flaring method to connect refrigerant tubes which run between
indoor and outdoor units. In this method, the copper tubes are
flared at each end and connected with flare nuts.
Flaring Procedure with a Flare Tool
(1) Cut the copper tube to the required length with a tube
cutter. It is recommended to cut approx. 30 – 50 cm longer
than the tubing length you estimate.
(2) Remove burrs at the end of the copper tube with a tube
reamer or file. This process is important and should be done
carefully to make a good flare.
Be sure to keep any contaminants (moisture, dirt, metal
filings, etc.) from entering the tubing. (Figs. 5-1 and 5-2)
Fig. 5-1 Fig. 5-2
NOTE
When reaming, hold the tube end downward and be sure that
no copper scraps fall into the tube. (Fig. 5-2)
(3) Remove the flare nut from the unit and be sure to mount it
on the copper tube.
(4) Make a flare at the end of the copper tube with a flare tool.
(Fig. 5-3)
Fig. 5-3
AfterBefore
Deburring
Copper
tubing
Reamer
Flare nut
Copper
tubing
Flare tool
Apply refrigerant lubricant
Flare nut
Union
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34
5-2. Connecting Tubing Between Indoor and
Outdoor Units
(1) Tightly connect the indoor-side refrigerant tubing extended
from the wall with the outdoor-side tubing.
(2) To fasten the flare nuts, apply specified torque (Fig. 5-6).
●When removing the flare nuts from the tubing connections,
or when tightening them after connecting the tubing, be sure
to use 2 adjustable wrenches or spanners. (Fig. 5-6)
If the flare nuts are over-tightened, the flare may be damaged,
which could result refrigerant leakage and cause injury or
asphyxiation to room occupants.
Fig. 5-6
●For the flare nuts at tubing connections, be sure to use the
flare nuts that were supplied with the unit, or else flare nuts
for R410A (type 2). The refrigerant tubing that is used must
be of the correct wall thickness as shown in the table below.
Tube diameter Tightening torque
(approximate) Tube thickness
ø6.35 (1/4") 14 – 18 N · m
(140 – 180 kgf · cm) 0.8 mm
ø9.52 (3/8") 34 – 42 N · m
(340 – 420 kgf · cm) 0.8 mm
ø12.7 (1/2") 49 – 61 N · m
(490 – 610 kgf · cm) 0.8 mm
ø15.88 (5/8") 68 – 82 N · m
(680 – 820 kgf · cm) 1.0 mm
ø19.05 (3/4") 100 – 120 N · m
(1000 – 1200 kgf · cm) 1.0 mm
Because the pressure is approximately 1.6 times higher than
conventional refrigerant pressure, the use of ordinary flare
nuts (type 1) or thin-walled tubes may result in tube rupture,
injury, or asphyxiation caused by refrigerant leakage.
●In order to prevent damage to the flare caused by over-
tightening of the flare nuts, use the table above as a guide
when tightening.
●When tightening the flare nut on the narrow tube, use an
adjustable wrench with a nominal handle length of 200 mm.
5-3. Insulating the Refrigerant Tubing
Tubing Insulation
●Thermal insulation must be applied to all units tubing,
including distribution joint (purchased separately).
* For gas tubing, the insulation material must be heat
resistant to 120°C or above. For other tubing, it must be
heat resistant to 80°C or above.
Insulation material thickness must be 10 mm or greater.
If the conditions inside the ceiling exceed DB 30°C and RH
70%, increase the thickness of the suction and gas tubing
insulation material by 1 step.
Two tubes arranged together
Three tubes arranged together
Four tubes arranged together
Fig. 5-7
CAUTION
If the exterior of the outdoor unit valves has been finished
with a square duct covering, make sure you allow sufficient
space to use the valves and to allow the panels to be
attached and removed.
Taping the flare nuts
Wind the white insulation tape around the flare nuts at the gas
tube connections. Then cover up the tubing connections with
the flare insulator, and fill the gap at the union with the supplied
black insulation tape. Finally, fasten the insulator at both ends
with the supplied vinyl clamps. (Fig. 5-8)
Fig. 5-8
Outdoor unit
Torque wrench
Spanner
Indoor unit
Liquid tubing Gas tubing
Insulation
Insulation tape (white) (supplied)
Sealer (supplied)
Flare insulator (supplied)
Tube insulator
(not supplied)
Heat resistant
120°C or above
Unit side
insulator
Flare nut Vinyl clamps (supplied)
Cosmetic
(finishing) tape Suction tubing
Liquid tubing
Insulation
Discharge tubing
Cosmetic
(finishing) tape Suction tubing
Balance tubing
Liquid tubing
Insulation
Discharge tubing
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6. AIR PURGING
Air and moisture in the refrigerant system may have undesirable
effects as indicated below.
●pressure in the system rises
●operating current rises
●cooling (or heating) efficiency drops
●moisture in the refrigerant circuit may freeze and block
capillary tubing
●water may lead to corrosion of parts in the refrigerant system
Therefore, the indoor unit and tubing between the indoor and
outdoor unit must be leak tested and evacuated to remove any
noncondensables and moisture from the system. (Figs. 6-1a
and 6-1b)
Fig. 6-1a Fig. 6-1b
Insulation material
The material used for insulation must have good insulation
characteristics, be easy to use, be age resistant, and must not
easily absorb moisture.
CAUTION
After a tube has been insulated, never try to bend it into
a narrow curve because it can cause the tube to break or
crack.
Never grasp the drain or refrigerant connecting outlets
when moving the unit.
5-4. Taping the Tubes
(1) At this time, the refrigerant tubes (and electrical wiring
if local codes permit) should be taped together with
armoring tape in 1 bundle. To prevent condensation from
overflowing the drain pan, keep the drain hose separate
from the refrigerant tubing.
(2) Wrap the armoring tape from the bottom of the outdoor
unit to the top of the tubing where it enters the wall. As you
wrap the tubing, overlap half of each previous tape turn.
(3) Clamp the tubing bundle to the wall, using 1 clamp approx.
each meter. (Fig. 5-9)
Fig. 5-9
NOTE
Do not wind the armoring tape too tightly since this will
decrease the heat insulation effect. Also ensure that the
condensation drain hose splits away from the bundle and drips
clear of the unit and the tubing.
5-5. Finishing the Installation
After finishing insulating and taping over the tubing, use sealing
putty to seal off the hole in the wall to prevent rain and draft
from entering. (Fig. 5-10)
Fig. 5-10
Insulated tubes
Clamp
Drain hose
Apply putty here
Tubing
Manifold gauge Vacuum pump
Outlet
Inlet
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■Air Purging with a Vacuum Pump (for Test Run)
Preparation
Check that each tube between the indoor and outdoor units
has been properly connected and all wiring for the test run has
been completed. Remove the valve caps from all service ports
on the outdoor unit (Fig. 6-2). Note that all service valves on
the outdoor unit are kept closed at this stage (Fig. 6-3).
The balance tube leak test is not necessary if only 1 outdoor
unit is installed.
Fig. 6-2
Lo Hi
Fig. 6-3
Leak test
(1) Attach a manifold valve (with pressure gauges) and dry
nitrogen gas cylinder to all service ports with charge hoses.
The balance tube leak test is not necessary if only 1
outdoor unit is installed.
CAUTION
Use a manifold valve for air purging. If it is not available,
use a stop valve for this purpose. The “Hi” knob of the
manifold valve must always be kept closed.
(2) Pressurize the system to no more than 33 kgf/cm2G with dry
nitrogen gas and close the cylinder valve when the gauge
reading reaches 33 kgf/cm2G. Then, test for leaks with liquid
soap.
CAUTION
To avoid nitrogen entering the refrigerant system in a
liquid state, the top of the cylinder must be higher than
the bottom when you pressurize the system. Usually, the
cylinder is used in a vertical standing position.
(3) Do a leak test of all joints of the tubing (both indoor and
outdoor) and all service valves. Bubbles indicate a leak.
Wipe off the soap with a clean cloth after the leak test.
(4) After the system is found to be free of leaks, relieve the
nitrogen pressure by loosening the charge hose connector
at the nitrogen cylinder. When the system pressure is
reduced to normal, disconnect the hose from the cylinder.
Valve cap
Flare nut
Service port cap
Manifold valve
Pressure
gauge
Cylinder
valve
Nitrogen gas cylinder
(In vertical standing
position)
Charge hose
Open
Close
Suction tube
Outdoor unit
Close
Open
Open
Close
Close
Open
Discharge tube
Liquid tube
Balance tube
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