Panasonic U-72MF2U94 User manual

INSTALLATION INSTRUCTIONS
Air Conditioner
This air conditioner uses the refrigerant R410A.
NOTE External diameter of service port R410A: 5/16" (7.94mm)
Model No.
Outdoor Units
Type Outdoor Unit Type Nominal Capacity
MF2 3WAY VRF System
72 96 120 144
U-72MF2U9 U-96MF2U9 U-120MF2U9 U-144MF2U9
U-72MF2U94 U-96MF2U94 U-120MF2U94 U-144MF2U94
• To be connecting Indoor Unit
Indoor Units
Type Indoor Unit Type Nominal Capacity
7 9 12 15 18 24 36 48 54
U2 4-Way Cassette
36" × 36"
S-07MU2U6 S-09MU2U6 S-12MU2U6 S-24MU2U6 S-36MU2U6
Y2 4-Way Cassette
24" × 24"
S-07MY2U6 S-09MY2U6 S-12MY2U6 S-18MY2U6
D1 1-Way Cassette S-07MD1U6 S-09MD1U6 S-12MD1U6
F2 Concealed Duct
- Medium Static
S-07MF2U6 S-09MF2U6 S-12MF2U6 S-15MF2U6 S-18MF2U6 S-24MF2U6 S-36MF2U6 S-48MF2U6 S-54MF2U6
M2 Concealed Duct
- Low Static
S-07MM2U6 S-09MM2U6 S-12MM2U6 S-15MM2U6 S-18MM2U6
E1 Concealed Duct
- High Static
S-36ME1U6 S-48ME1U6
T2 Ceiling S-12MT2U6 S-18MT2U6 S-24MT2U6
K2 Wall Mounted S-07MK2U6 S-09MK2U6 S-12MK2U6 S-18MK2U6 S-24MK2U6
P1 Floor Standing S-07MP1U6 S-09MP1U6 S-12MP1U6 S-15MP1U6 S-18MP1U6 S-24MP1U6
R1 Concealed Floor
Standing
S-07MR1U6 S-09MR1U6 S-12MR1U6 S-15MR1U6 S-18MR1U6 S-24MR1U6
Read through the Installation Instructions before you proceed with the installation.
In particular, you will need to read under the “IMPORTANT!” section at the top of the page.
85464369843023
CV6233323510
ACXF60-18571
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2
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.
● This air conditioner shall be installed in accordance with
National Wiring Regulations.
● Pay close attention to all warning and caution notices
given in this manual.
WARNING
WARNING
This symbol refers to a hazard or
unsafe practice which can result
in severe personal injury or death.
WARNING
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
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 over-
heating at connection points and a possible re hazard.
• To prevent possible hazards from insulation failure,
the unit must be grounded.
• This equipment is strongly recommended to be installed
with Earth Leakage Circuit Breaker (ELCB) or Residual
Current Device (RCD). Otherwise, it may cause electrical
shock and re in case of equipment breakdown or
insulation breakdown.
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…
Select an installation location which is rigid and strong
enough to support or hold the unit, and select a location for
easy maintenance.
…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.
WARNING
CAUTION
Keep the fire alarm and the air
outlet at least 5 ft. (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 bafe.
…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.
When Connecting Refrigerant Tubing
• Pay particular attention to refrigerant leakages.
• Ventilate the room immediately, 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 toxic gas.
• Keep all tubing runs as short as possible.
• Apply refrigerant lubricant to the matching surfaces of the
are 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.
WARNING
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.
• If the refrigerant comes in contact with a ame,
it produces a toxic gas.
• Do not add or replace refrigerant other than
specied type. It may cause product damage,
burst and injury, etc.
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• 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 nish, remembering to
check that no metal scraps or bits of wiring have been
left inside the unit .
WARNING
WARNING
• This product must not be modied or
disassembled under any circumstances.
Modied or disassembled unit may cause re,
electric shock or injury.
• 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 to the sales
dealer or service dealer for a repair.
WARNING
CAUTION
• Do not touch the air inlet or the sharp
aluminum fins of the outdoor unit.You
may get injured.
• Ventilate any enclosed areas when installing or
testing the refrigeration system. Leaked
refrigerant gas, on contact with re or heat, can
produce dangerously toxic gas.
• Conrm 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 toxic gas.
Others
WARNING
CAUTION
• Do not sit or step on the unit, you may
fall down accidentally.
• Do not touch the air inlet or the sharp
aluminum fins of the outdoor unit.
You may get injured.
• Do not stick any object into the FAN
CASE.
You may be injured and the unit may
be damaged.
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 oor 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).
ASHRAE and the International Mechanical Code of the
ICC as well as CSA provide guidance and dene
safeguards related to the use of refrigerants, all of which
dene a Refrigerant Concentration Level (RCL) of 400 oz
(11.3 kg) per 1,000 ft3(28.3 m3) for R410A refrigerant.
For additional guidance and precautions related to
refrigerant safety, please refer to the following documents:
International Mechanical Code 2012 (IMC-2012)
(or more recently revised)
ASHRAE 15
ASHRAE 34
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Precautions for Installation Using New Refrigerant
1. Care regarding tubing
1-1. Process tubing
●Material: Use seamless phosphorous deoxidized copper tube for refrigeration. Wall thickness shall comply with the
applicable legislation. The minimal wall thickness must be in accordance with the table below.
●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
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.
Material: O Material: O
Outer diameter Wall thickness Outer diameter Wall thickness
1/4" (6.35) 0.025 (0.635) 7/8" (22.22) 0.045 (1.143)
3/8" (9.52) 0.030 (0.762) 1-1/8" (28.58) 0.050 (1.27)
1/2" (12.7) 0.035 (0.889) 1-3/8" (34.92) 0.055 (1.397)
5/8" (15.88) 0.040 (1.016) 1-5/8" (41.28) 0.060 (1.524)
3/4" (19.05) 0.042 (1.0668) Unit: in. (mm)
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.
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
tools?
R407C tools
compatible
with R410A?
Remarks
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 detector for HFC134a can be used for R410A.
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.
Manifold gauge
Vacuum pump
Outlet
Inlet
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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.
New refrigerant R410A cannot be used for
earlier models
1. Compressor specifications are different.
If recharging a R22 or R407C compressor with
R410A, durability will significantly decrease since
some of the materials used for compressor parts are
different.
2. Existing tubing cannot be used (especially R22).
Completely cleaning out residual refrigerating
machine oil is impossible, even by flushing.
3. Refrigerating machine oil differs (R22).
Since R22 refrigerating machine oil is mineral oil, it
does not dissolve in R410A. Therefore, refrigerating
machine oil discharged from the compressor can
cause compressor damage.
R22 refrigerating machine oil Mineral oil (Suniso oil)
R407C refrigerating machine oil Synthetic fluid (ether oil)
R410A refrigerating machine oil Synthetic fluid (ether oil)
Valve
Liquid
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IMPORTANT! ............................. 2
Please Read Before Starting
Check of Density Limit
Precautions for Installation Using New Refrigerant
New refrigerant R410A cannot be used for earlier models
1. GENERAL............................. 7
1-1. Tools Required for Installation (not supplied)
1-2. Accessories Supplied
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 Kits
1-14. Optional Solenoid Valve Kit
1-15. Example of Tubing Size Selection and
Refrigerant Charge Amount
2. SELECTING THE INSTALLATION SITE . . . . . 18
2-1. Outdoor Unit
2-2. Shield for Horizontal Exhaust Discharge
2-3. Installing the Outdoor Unit in Heavy Snow
Areas
2-4. Precautions When Installing 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 . . . . . . . . . . . . . . . . . . 29
4-1. General Precautions on Wiring
4-2. Recommended Wire Length and Wire
Diameter for Power Supply System
4-3. Wiring System Diagram
5. HOW TO PROCESS TUBING . . . . . . . . . . . . . 35
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. AIRPURGING......................... 38
nAir Purging with a Vacuum Pump (for Test Run)
Preparation
7. TESTRUN............................ 41
7-1. Preparing for Test Run
7-2. Test Run Procedure
7-3. Main Outdoor Unit PCB Setting
7-4. Function Switches on P.C. Board
7-5. Auto Address Setting
7-6. Setting Test Run Remote Controller
7-7. Caution for Pump Down
7-8. Self-Diagnosis Function Table and Contents of
Alarm Display
CONTENTS
Page Page
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1-1. Tools Required for Installation (not supplied)
1. Flathead screwdriver
2. Phillips head screwdriver
3. Knife or wire stripper
4. Tape measure
5. Level gauge
6. Sabre saw or keyhole 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
See Table 1.
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 5/16" (7.94mm).
3. Use insulated copper wire for field wiring. Wire size varies
with the total length of wiring.
See the section
“ 4. ELECTRICAL WIRING” for details.
CAUTION
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
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 outdoor unit and make sure all accessory parts listed are with the system before beginning.
Table 1 Outdoor Unit
Part name Figure
Q’ty
U-72MF2U9
U-72MF2U94
(6 ton)
U-96MF2U9
U-96MF2U94
(8 ton)
U-120MF2U9
U-120MF2U94
(10 ton)
U-144MF2U9
U-144MF2U94
(12 ton)
Connection
tubing
Outer
diameter
ø1-1/8"(ø28.58)
Inner
diameter
ø1"(ø25.4)
0011
Outer
diameter
ø7/8"(ø22.22)
Inner
diameter
ø3/4"(ø19.05)
0011
Outer
diameter
ø3/4"(ø19.05)
Outer
diameter
ø5/8"(ø15.88)
0100
Operating
Instructions paper 1111
Installation
Instructions paper 1111
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LO LA
LF
LM
LB
LC
L2
L3
L4
LG
LD
LH
H2
H3
H1
L1
2
1
6
5
A
B
C
50 51 52
3
2-1
2-2
3-1 3-2
4
4-1 4-2
4
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.
NOTE
* Be sure to use special R410A distribution joints (CZ: optional parts) for outdoor unit connections and tubing branches.
Table 2 Ranges that Apply to Refrigerant Tubing Lengths and to Differences in Installation Heights
unit: ft. (m)
Item Mark Contents Length
Allowable tubing
length
L1 Max. tubing length Actual length 656 (200)*2
Equivalent length 689 (210)*2
L (L2 – L4) Difference between max. length and min.
length from the 1st distribution joint 164 (50)*5
LM
Max. length of main tubing (at maximum size)
* Even after 1st distribution joint, LM is allowed if at
maximum tubing length.
- *3
1, 2~ 52 Max. length of each distribution tube 164 (50)*6
L1 + 1 + 2~ 51 + A
+ B + LF + LG + LH
Total max. tubing length including length of each distribution
tube (only liquid tubing) 1640 (500)
A, B + LO, C + LO Maximum tubing length from outdoor’s 1st distribution
joint to each outdoor unit 33 (10)
1-2, 2-2~ 52-2 Max. length between solenoid valve kit and indoor unit 98 (30)
Allowable elevation
difference
H1 When outdoor unit is installed higher than indoor unit 164 (50)
When outdoor unit is installed lower than indoor unit 131 (40)
H2 Max. difference between indoor units 49 (15)
H3 Max. difference between outdoor units 13 (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 6.6 (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 295 ft. (90m) (equivalent length), increase the sizes of the main tubes (LM) by 1 rank for the suction
tubes, discharge tubes and liquid tubes. Use a field supply reducer. Select the tube size from the table of main tubing size (Table 3) and from
the table of refrigerant tubing size (Table 9).
*3: If the longest main tubing length (LM) exceeds 164 ft. (50m), increase the main tubing size at the portion before 164 ft. (50m) by 1 rank for the
suction tubes and discharge tubes. Use a field supply reducer.
For the portion that exceeds 164 ft. (50m), set based on the main tubing size (LA) listed in Table 3.
4: When increasing the sizes of the main tubes (LM), it is not necessary to increase the rank for the discharge tubes of the outdoor unit 18, 20
and 22 ton.
*5: If the tubing length marked “L” (L2 - L4) exceeds 131 ft. (40m), increase the tubing size at the portion after the 1st distribution joint by 1 rank
for the liquid tube, suction tube and discharge tube.
Refer to the Technical Data for the details.
1. Main tubing length (maximum tubing size) LM = LA + LB …
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 – 52 are determined by the connection tubing sizes on the indoor units.
R410A optional distribution joint
CZ-P900PH1U (for outdoor unit)
CZ-P224BH1U (for indoor unit)
CZ-P680BH1U (for indoor unit)
CZ-P1350BH1U (for indoor unit)
Balance tubing
(ø1/4" (6.35mm))
Explanation of symbols
1st distribution joint for outdoor unit
1st distribution joint (for indoor unit)
Distribution joint
(CZ: optional parts)
For
extension
For
extension
Solenoid valve kit
Max.1.3 ft (40cm)
Max.1.3 ft (40cm)
Solidly welded shut
(pinch weld)
Ball valve (field supply)
T-joint (field supply)
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9
*6: If any of the tubing length exceeds 98ft. (30m), increase the size of the tubes (liquid tube, suction tube and discharge tube)
between the distribution tube and solenoid valve kit by 1 rank and also increase the size of the tubes (liquid tube and gas tube)
between the solenoid valve kit and indoor unit by 1 rank.
* However, in the case of the Type 56 solenoid valve kit, it is not necessary to increase the tubes (liquid tube, suction tube and
discharge tube) between the distribution tube and solenoid valve kit by 1 rank.
7: If the size of suction tubes is ø1-5/8 in. (41.28mm), do not increase the size by 1 rank for the suction tubes.
1-6. Tubing Size
Table 3 Main Tubing Size (LA)
Between 1st distribution joint for outdoor unit and 1st distribution joint (for indoor unit) Unit: in. (mm)
BTU/h
(kW)
72,000
(21.1)
96,000
(28.1)
120,000
(35.2)
144,000
(42.2)
168,000
(49.2)
192,000
(56.3)
216,000
(63.3)
240,000
(70.3)
264,000
(77.4)
288,000
(84.4)
312,000
(91.4)
336,000
(98.4)
360,000
(105.5)
Total system
tonnage 6 8 10 12 14 16 18 20 22 24 26 28 30
Suction
tubing
ø3/4"
(ø19.05)
ø7/8"
(ø22.22)
ø1-1/8"
(ø28.58)
ø1-3/8"
(ø34.92)
ø1-5/8"
(ø41.28)
Discharge
tubing
ø5/8"
(ø15.88)
ø3/4"
(ø19.05)
ø7/8"
(ø22.22)
ø1-1/8"
(ø28.58)
Liquid tubing ø3/8"
(ø9.52)
ø1/2"
(ø12.7)
ø5/8"
(ø15.88)
ø3/4"
(ø19.05)
* If future extension is planned, select the tubing diameter based on the total tonnage after extension.
However, extension is not possible if the resulting tubing size is three ranks higher.
* The balance tube (outdoor unit tube) diameter is ø1/4" (6.35mm).
* Type 1 tubing should be used for the refrigerant tubes.
nSize 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 4 Main Tubing Size After Distribution (LB, LC...) Unit: in. (mm)
Total capacity
after distribution
Below BTU/h (kW) 24,200
(7.09)
54,600
(16.0)
85,300
(25.0)
102,400
(30.0)
124,200
(36.4)
143,300
(42.0)
162,400
(47.6)
200,600
(58.8)
Over BTU/h (kW) –24,200
(7.09)
54,600
(16.0)
85,300
(25.0)
102,400
(30.0)
124,200
(36.4)
143,300
(42.0)
162,400
(47.6)
Tubing size
Suction tubing ø5/8"
(ø15.88)
ø3/4"
(ø19.05)
ø3/4"
(ø19.05)
ø7/8"
(ø22.22)
ø1-1/8"
(ø28.58)
ø1-1/8"
(ø28.58)
ø1-1/8"
(ø28.58)
ø1-1/8"
(ø28.58)
Discharge tubing ø1/2"
(ø12.7)
ø5/8"
(ø15.88)
ø5/8"
(ø15.88)
ø3/4"
(ø19.05)
ø3/4"
(ø19.05)
ø7/8"
(ø22.22)
ø7/8"
(ø22.22)
ø7/8"
(ø22.22)
Liquid tubing ø3/8"
(ø9.52)
ø3/8"
(ø9.52)
ø3/8"
(ø9.52)
ø3/8"
(ø9.52)
ø1/2"
(ø12.7)
ø1/2"
(ø12.7)
ø1/2"
(ø12.7)
ø5/8"
(ø15.88)
Total capacity
after distribution
Below BTU/h (kW) 238,900
(70.0)
340,000
(99.6) –
Over BTU/h (kW) 200,600
(58.8)
238,900
(70.0)
340,000
(99.6)
Tubing size
Suction tubing ø1-1/8"
(ø28.58)
ø1-3/8"
(ø34.92)
ø1-5/8"
(ø41.28)
Discharge tubing ø1-1/8"
(ø28.58)
ø1-1/8"
(ø28.58)
ø1-1/8"
(ø28.58)
Liquid tubing ø5/8"
(ø15.88)
ø3/4"
(ø19.05)
ø3/4"
(ø19.05)
Table 5 Outdoor Unit Tubing Connection Size ( A –C) Unit: in. (mm)
BTU/h
(kW)
72,000
(21.1)
96,000
(28.1)
120,000
(35.2)
144,000
(42.2)
Suction tubing
ø3/4"
(ø19.05)
ø7/8"
(ø22.22)
ø1-1/8"
(ø28.58)
Brazing connection
Discharge
tubing
ø5/8" (ø15.88) ø3/4" (ø19.05) ø7/8" (ø22.22)
Flare connection Brazing connection
Liquid tubing ø3/8" (ø9.52) ø1/2" (ø12.7)
Flare connection
Balance tubing ø1/4" (ø6.35)
Flare connection
ex.) Type 72
Liquid tube
Discharge tube Suction tube
Balance tube
Note: In case the total capacity of connected indoor units
exceeds the total capacity of the outdoor units,
select the main tubing size for the total capacity of
the outdoor units.
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10
Table 6 Refrigerant Charge Amount at Shipment (for outdoor unit)
BTU/h (kW) 72,000 (21.1) 96,000 (28.1) 120,000 (35.2) 144,000 (42.2)
Initial amount oz (g)293 (8,300) 293 (8,300) 353 (10,000) 416 (11,800)
Table 7 Indoor Unit Tubing Connection Size ( 1 – 52) Unit: in. (mm)
Indoor unit type 7 9 12 15 18 24 36 48 54
Distribution
joint-solenoid
valve kit tubing
Suction tubing ø5/8" (ø15.88)
Discharge tubing ø1/2" (ø12.7)
Liquid tubing ø3/8" (ø9.52)
Solenoid valve
kit-Indoor unit
tubing
connection
Gas tubing ø1/2" (ø12.7) ø5/8" (ø15.88)
Liquid tubing ø1/4" (ø6.35) ø3/8" (ø9.52)
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 8 Straight Equivalent Length of Joints Unit: ft. (m)
Tubing size (in. (mm)) 1/2"
(12.7)
5/8"
(15.88)
3/4"
(19.05)
7/8"
(22.22)
1-1/8"
(28.58)
1-3/8"
(34.92)
1-5/8"
(41.28)
90° elbow 1
(0.30)
1.1
(0.35)
1.4
(0.42)
1.6
(0.48)
1.9
(0.57)
2.5
(0.76)
2.8
(0.85)
45° elbow 0.8
(0.23)
0.9
(0.26)
1
(0.32)
1.2
(0.36)
1.4
(0.43)
1.8
(0.55)
2.0
(0.61)
U-shape tube bent (R2-3/8" – 4" (60 – 100mm)) 3
(0.90)
3.4
(1.05)
4.1
(1.26)
4.7
(1.44)
5.6
(1.71)
7.4
(2.26)
8.4
(2.56)
Trap bend 7.5
(2.30)
9.2
(2.80)
10.5
(3.20)
12.5
(3.80)
15.4
(4.70)
19.2
(5.85)
22.3
(6.80)
Y-branch distribution joint Equivalent length conversion not needed.
Ball valve for service Equivalent length conversion not needed.
Table 9 Refrigerant tubing (Existing tubing can be used.)
Tubing size (in. (mm)) * 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.
Material: O Material: O Material: O
Outer diameter Wall thickness Outer diameter Wall thickness Outer diameter Wall thickness
1/4" (6.35) 0.025 (0.635) 5/8" (15.88) 0.040 (1.016) 1-1/8" (28.58) 0.050 (1.27)
3/8" (9.52) 0.030 (0.762) 3/4" (19.05) 0.042 (1.0668) 1-3/8" (34.92) 0.055 (1.397)
1/2" (12.7) 0.035 (0.889) 7/8" (22.22) 0.045 (1.143) 1-5/8" (41.28) 0.060 (1.524)
1-8. Additional Refrigerant Charge
Additional refrigerant charge amount is calculated from the liquid tubing total length, combination number of outdoor unit and
refrigerant amount according to all indoor unit cooling capacity.
Required amount of additional refrigerant charge
= [(Necessary amount of additional refrigerant charge per ft. (m) of each size of liquid tube × its tube length) + (...) + (...)]
+ [Necessary amount of additional refrigerant charge per outdoor unit]
+ [Necessary amount of additional refrigerant charge for all indoor unit cooling capacity]
+ [(Necessary amount of additional refrigerant charge per ft. (m) of each size of discharge tube × its tube length) + (...) + (...)]
* Always charge accurately using a scale for weighing.
Table 10 Necessary Amount of Additional Refrigerant Charge Per ft. (or per meter), According to Liquid Tubing Size
Liquid tubing size inch ø1/4" ø3/8" ø1/2" ø5/8" ø3/4" ø7/8"
(mm) (ø6.35) (ø9.52) (ø12.7) (ø15.88) (ø19.05) (ø22.22)
Additional amount oz/ft. 0.279 0.602 1.38 1.99 2.78 3.93
(g/m) (26) (56) (128) (185) (259) (366)
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11
Table 11 Necessary Amount of Additional Refrigerant Charge Per Outdoor Unit
Further charge a certain amount listed below in addition to the amount of refrigerant charge.
Combination number of outdoor unit 123
Additional amount oz (g)70.5 (2,000) 141.0 (4,000) 212 (6,000)
Necessary Amount of Additional Refrigerant Charge for All Indoor Unit Cooling Capacity
Charge a refrigerant amount calculated in the following formula according to the total amount of indoor unit cooling capacity.
Additional refrigerant amount when cooling capacity is BTU/h = Cooling capacity (BTU/h) × 1.034 × 0.001 + 10.6 (oz)
or Additional refrigerant amount when cooling capacity is kW = Cooling capacity (kW) × 1000 × 0.1 + 300 (g)
Table 12
Necessary Amount of Additional Refrigerant Charge Per ft. (or per meter), According to Discharge Tubing Size
Discharge tubing size inch ø1/2" ø5/8" ø3/4" ø7/8" ø1-1/8" ø1-3/8"
(mm) (ø12.7) (ø15.88) (ø19.05) (ø22.22) (ø28.58) (ø34.92)
Additional amount oz/ft. 0.129 0.226 0.333 0.441 0.763 1.118
(g/m) (12) (21) (31) (41) (71) (104)
1-9. System Limitations
Table 13 System Limitations
Max. No. allowable connected outdoor units 3 *2
Max. capacity allowable connected outdoor
units
360,000 BTU/h
(30 ton, 105.5 kW)
Max. connectable indoor units 52 *1
Max. allowable indoor/outdoor capacity ratio 50 – 150 % *3
*1: In the case of 20 ton (70.3kW) or smaller units, the number is
limited by the total capacity of the connected indoor units.
*2: Up to 3 units can be connected if the system has been extended.
*3: It is strongly recommended that you choose the unit so the load
can become between 50 and 130%.
Table 14 System Limitations of Total Refrigerant Amount
Combination number of outdoor unit 123
Upper limit oz (g)1,763 (50,000) 2,821 (80,000) 3,703 (105,000)
Make sure the values calculated using the following formula should not exceed the maximum allowable values (Table 14).
Total refrigerant amount = Refrigerant charge amount at shipment (for outdoor unit)
+
Necessary amount of additional refrigerant charge per ft. (or per meter) according to liquid tubing size
+ Necessary amount of additional refrigerant charge per outdoor unit
+ Necessary amount of additional refrigerant charge for all indoor unit cooling capacity
+ Necessary amount of additional refrigerant charge per ft. (or per meter) according to discharge tubing size
Maximum number of connectable indoor units
when connected with minimum capacity
Total system
tonnage
Number of
indoor units
Total system
tonnage
Number of
indoor units
6 14 16 38
8 19 18 43
10 24 20 48
12 28 22~30 52
14 33
* Additional refrigerant charge amount of discharge tubing should be less than 317 oz (9,000g).
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12
1-10. Installation Standards
Relationship between A/C units and refrigerant tubing
Outdoor unit
Suction tube
Discharge tube
Liquid tube
Balance tube
Suction tube
Discharge tube
Liquid tube
Gas tube
Liquid tube
Outdoor unit Indoor unit
Solenoid
valve kit
4-tube layout 3-tube layout 2-tube layout
● Install the solenoid valve kit 164 ft. (50m) 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.
● The solenoid valve kit must be located not less than 8.2 ft. (2.5m) above the oor or that cannot be touched.
Strongly recommended installation
Hallway
Room
Indoor unit
Room
Indoor unit
Room
Indoor unit
Room
Indoor unit
Solenoid
valve kit
Solenoid
valve kit
Hallway
Avoid
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 Capacity of indoor unit
160 Type 24 - 54
56 Type 18 or under
● If the capacity range is exceeded, use 2 solenoid valves connected in parallel.
WARNING
CAUTION
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.
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13
1-12. Installing Distribution Joint
CAUTION
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) Refer to “HOW TO ATTACH DISTRIBUTION JOINT” enclosed with the optional distribution joint kit (CZ-P900PH1U,
CZ-P224BH1U, CZ-P680BH1U, CZ-P1350BH1U).
●When connecting a branch tubing to the indoor unit directly, it is necessary for each branch tubing to install at a positive angle
with respect to horizontal in order to prevent accumulation of refrigerant oil in stopped units. (See the below chart.)
Branch tubing system Restricted Not restricted
A
B
How to install
branch tubing
When connecting branch tubing to indoor unit directly
When not connecting
branch tubing to indoor
unit directly
Suction tube
* In case of common use solenoid valve kit Liquid tube / Discharge tube
Suction tube /
Discharge tube /
Liquid tube
When connecting to A When connecting to B
Horizontal
A
D
B
15〜90°
Straight tubing
length over
8 in. (200mm)
Arrow view D
15〜90°
15〜30°
15〜90°
15〜30°
Straight tubing
length over
8 in. (200mm)
(Branch tubing
angle)
Horizontal
Straight tubing length
over 8 in. (200mm)
or
0〜30°
(Branch tubing
angle)
Horizontal
Vertical
Upward
Vertical Vertical Vertical Vertical
Downward
15〜90°
Vertical
Straight tubing
length over
8 in. (200mm)
15〜90°
Straight tubing
length over
8 in. (200mm)
Vertical
Vertical Vertical
● 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.
Be sure to use a commercial available T-joint.
●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.
Header branch system (Main tubing is horizontal.)
Outdoor
Indoor
Indoor
Indoor
(From 1st branch to tip
of solidly welded part)
Horizontal line
Horizontal line
Install at a positive angle
(15~30°)
Install at a positive angle
(15~30°)
Solidly welded shut (X)
6.5 ft. (2m)
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14
1-13. Optional Distribution Joint Kits
Refer to the installation instructions packaged with the distribution joint kit for the installation procedure.
Table 15
Model name Cooling capacity after distribution Remarks
1. CZ-P900PH1U — For outdoor unit
2. CZ-P224BH1U 76,400 BTU/h (22.4kW) or less* For indoor unit
3. CZ-P680BH1U 232,000 BTU/h (68.0kW) or less* For indoor unit
4. CZ-P1350BH1U more than 232,000 BTU/h (68.0kW)* For indoor unit
nTubing size (with thermal insulation)
1. CZ-P900PH1U
Note that the dimension marked with every alphabetical letter in the diagram shows the inner diameter.
11-13/16
(300)
11-13/16
(300)
(340)
13-25/64
D
C
BFD E
CCH
IH I
EGFEE FG
E
F
G
#C C
E
D
DE
#C
D
#C
E
F
#C
Suction tube
Distribution
Joint
Insulation Insulation Insulation
Discharge tube Liquid tube
*Insulators for both the Suction tube and the Discharge tube are the same.
* Suction tube and Discharge tube are similar in sizes and both the tube entrances have the same diameter. So the both
Distribution joints can fit into different tubes. Since the diameter of the tube ends for both Suction and Discharge tube are
different, take care not to connect the distribution joint different. See the “ # ” marks on the above figures.
* With regard to the diameter of the tube without description in Table 16, use a reducer (field supply) to adjust the tube
diameter.
Table 16 Dimensions for connections of each part
Size Part B Part C Part D Part E Part F Part G Part H Part I
Inch ø1-3/8 ø1-1/8 ø1 ø7/8 ø3/4 ø5/8 ø1/2 ø3/8
(mm) (ø34.92) (ø28.58) (ø25.4) (ø22.22) (ø19.05) (ø15.88) (ø12.7) (ø9.52)
Unit: in. (mm)
* In case the total capacity of indoor units
connected after distribution exceeds the
total capacity of the outdoor units, select
the distribution tube size for the total
capacity of the outdoor units.
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15
Table 17 Dimensions for connections of each part
Position A BC D E F G H I J
Dimension ø1-1/2" ø1-1/4" ø1-1/8" ø1" ø7/8" ø3/4" ø5/8" ø1/2" ø3/8" –
(ø38.1) (ø31.75) (ø28.58) (ø25.4) (ø22.22) (ø19.05) (ø15.88) (ø12.7) (ø9.52) –
2. CZ-P224BH1U
Use: For indoor unit (Capacity after distribution joint is 76,400 BTU/h (22.4kW) or less.)*
Example: (F below indicates inner diameter. F below indicates outer diameter.)
G
G H
F
F
H
G
G
G
G
FH
HH
H II H
H
I
F
F
F
H
H
H
8–17/64
(210) (186) (235)
(136)
(40)
(55)
(145)
2–11/64
3–5/8 15/32
5–45/64
2–11/64
(55)
(92)
(77)
(69)
(7)
(12)
1–37/64
3–1/32 9/32
7–21/64
5–23/64
2–23/32
9–1/4
Suction tube Discharge tube Liquid tube
Thermal insulation Thermal insulation
Thermal insulation
3. CZ-P680BH1U
Use: For indoor unit (Capacity after distribution joint is greater than 76,400 BTU/h （22.4kW） and no more than 232,000 BTU/h (68.0kW).)*
Note that the dimension marked with every alphabetical letter in the diagram shows the inner diameter.
Insulation
GH
G
IHHI
I
H
D FE
DCC
#C #D
#D
#C
FE
GFE E FG
E
F
G
E
F
DE
F
F E D EF
H
G
G
11-13/16
11-13/16
(300) (300)
13-25/64 (340)
Suction tube
Insulation
Insulation
Discharge tube Liquid tube
*Insulators for both the Suction tube and the Discharge tube are the same.
*Suction tube and Discharge tube are similar in sizes and both the tube entrances have the same diameter.
So the both Distribution joints can fit into different tubes. Since the diameter of the tube ends for both Suction and Discharge
tube are different, take care not to connect the distribution joint different. See the “ # ” marks on the above figures.
4. CZ-P1350BH1U
Use: For indoor unit (Capacity after distribution joint is more than 232,000 BTU/h (68.0kW).)*
Example: (B below indicates inner diameter. B below indicates outer diameter.)
（45）
GFEEFG
E
F
G
H I
H
I
I
H
B
B B
E CDA FF E AD C
A
C
C
D
E
F
H
G
5–1/8
13–25/64
(340) (50)
G
G
G
1–31/32
C
BBC
B
C
F
3–35/64
(90) (105) (112)
4–9/64 4–13/32
1–49/64
2–11/64
（55）
(130)
Suction tube • Discharge tube
Thermal insulation Thermal insulation
Liquid tube
* With regard to the diameter of the tube without description in Table 17, use a reducer (field supply) to adjust the tube diameter.
Unit: in. (mm)
Unit: in. (mm)
Unit: in. (mm)
Unit: in. (mm)
* In case the total capacity of indoor units connected after distribution exceeds the total capacity of the outdoor units, select the
distribution tube size for the total capacity of the outdoor units.
1-14. Optional Solenoid Valve Kit
NOTE
Refer to the installation instructions attached to the optional Solenoid Valve Kit.
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16
1-15. Example of Tubing Size Selection and Refrigerant Charge Amount
Additional refrigerant charging
Based on the values in Tables 3, 4, 5, 7, 10 and 11, use the liquid tubing size and length, and calculate the amount of additional
refrigerant charge using the formula below.
Unit of account (oz)
Required additional
refrigerant charge (oz) =
Necessary Amount of Additional Refrigerant Charge Per Outdoor Unit
+ 3.93 × (a) + 2.78 × (b) + 1.99 × (c) + 1.38 × (d) + 0.602 × (e) + 0.279 × (f)
+ Necessary amount of additional refrigerant charge for all indoor unit cooling capacity
or + 0.763 × (A) + 0.441 × (B) + 0.333 × (C) + 0.226 × (D) + 0.129 × (E)
Unit of account (g)
Required additional
refrigerant charge (g)=
Necessary Amount of Additional Refrigerant Charge Per Outdoor Unit
+ 366 × (a) + 259 × (b) + 185 × (c) + 128 × (d) + 56 × (e) + 26 × (f)
+ Necessary amount of additional refrigerant charge for all indoor unit cooling capacity
+ 71 × (A) + 41 × (B) + 31 × (C) + 21 × (D) + 12 × (E)
(a) : Liquid tubing Total length of ø7/8" (ft.) or (m) (A) :
Discharge tubing Total length of ø1-1/8" (ft.) or (m)
(b) : Liquid tubing Total length of ø3/4" (ft.) or (m) (B) :
Discharge tubing Total length of ø7/8" (ft.) or (m)
(c) : Liquid tubing Total length of ø5/8" (ft.) or (m) (C) :
Discharge tubing Total length of ø3/4" (ft.) or (m)
(d) : Liquid tubing Total length of ø1/2" (ft.) or (m) (D) :
Discharge tubing Total length of ø5/8" (ft.) or (m)
(e) : Liquid tubing Total length of ø3/8" (ft.) or (m) (E) :
Discharge tubing Total length of ø1/2" (ft.) or (m)
(f) : Liquid tubing Total length of ø1/4" (ft.) or (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. However, if only one
outdoor unit is installed, a balance tube is not used. Therefore, leave the valves fully closed.)
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
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.
3
33
2
4
2
1
4
2
4
11
1 Suction tube 2 Discharge tube 3 Liquid tube 4 Balance tube
Use a flathead
screwdriver and open
by turning the part with
the screw groove to the
right, from “ –” to “ | ”.
(For type 72/96)
Use a hex wrench (width
15/64 inch (6mm)) and
turn to the left to open.
(For type 120/144)
Use a flathead
screwdriver and open
by turning the part with
the screw groove to the
right, from “ –” to “ | ”.
Use a hex wrench (width
5/32 inch (4mm)) and
turn to the left to open.
Use a flathead
screwdriver and open
by turning the part with
the screw groove to the
right, from “ –” to “ | ”.
For type 72 For type 96 For type 120/144
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17
● Example of each tubing length
Main tubing Distribution joint tubing
LA = 131 ft. (40m) Outdoor side Indoor side
LB = 16 ft. (4.9m) A = 7 ft. (2.1m) 1 = 98 ft. (30m) 1-1 = 82 ft. (25m)
LC = 16 ft. (4.9m) B = 7 ft. (2.1m) 2 = 16 ft. (4.9m) 2-1 = 13 ft. (4m)
3 = 16 ft. (4.9m) 3-1 = 13 ft. (4m)
4 = 65 ft. (19.8m) 4-1 = 49 ft. (15m)
1 2 3 4
LA LB LC
A
B
1-1 2-1 3-1 4-1
Type 96 Type 72
Type 48 Type 48 Type 48 Type 36
● Obtain liquid tubing size from Tables 3, 4, 5, 7 and 10.
Main tubing
LA = ø5/8 (in.) (Total capacity of indoor unit is 179,400 BTU/h (52.6kW))
LB = ø1/2 (in.) (Total capacity of indoor unit is 131,600 BTU/h (38.6kW))
LC = ø3/8 (in.) (Total capacity of indoor unit is 83,800 BTU/h (24.6kW))
Distribution joint tubing
Outdoor side A: ø3/8 (in.) B: ø3/8 (in.) (from outdoor unit connection tubing)
Indoor side 1-1: ø 3/8 (in.) 2-1: ø 3/8 (in.) 3-1: ø 3/8 (in.) 4-1: ø 3/8 (in.) (from indoor unit connection tubing)
● Obtain discharge tubing size from Tables 3, 4 and 12.
Main tubing
LA = ø7/8 (in.) LB = ø7/8 (in.) LC = ø5/8 (in.)
Distribution joint tubing
Outdoor side A: ø5/8 (in.) B: ø3/4 (in.) (from outdoor unit connection tubing)
Indoor side 1: ø5/8 (in.) 2: ø5/8 (in.) 3: ø5/8 (in.)
4: ø5/8 (in.) (from solenoid valve kit connection tubing)
●
Obtain additional charge amount for each tubing size and additional refrigerant charge amount for outdoor unit and all indoor units cooling capacity.
Note 1: The charge amounts per 1 ft. are different for each liquid tubing size.
ø5/8 (in.) →LA : 131 ft. × 1.99 oz/ft. =261 oz (40m × 185 g/m = 7,400g)
ø1/2 (in.) → LB : 16 ft. × 1.38 oz/ft. = 22 oz (4.9m × 128 g/m = 627g)
ø3/8 (in.) →LC + A + B + 1 + 2 + 3+ 4 : 225 ft. × 0.602 oz/ft. =135 oz (68.6m × 56 g/m = 3,842g)
Total 418 oz (Total 11,869g)
Additional refrigerant charge amount is 418 oz (11,869g).
Note 2:
Necessary amount of additional refrigerant charge per outdoor unit is 141oz (4,000g) in combination of 2 units. (See Table 11.)
Note 2) Amount of additional charge for outdoor unit (combination number) :141oz (4,000g)
Note 3: Necessary amount of additional refrigerant charge for all indoor unit cooling capacity
[BTU/h] [kW]
179,400 BTU/h
Cooling capacity (BTU/h) x 1.034 x 0.001 + 10.6 oz
= 179,400 x 1.034 x 0.001 + 10.6 = 196 oz
(52.6 kW)
(Cooling capacity (kW) x1000 x 0.1 + 300g
= 52.6 x 1000 x 0.1 + 300 = 5,560 g)
Note 4: The charge amounts per 1 ft. are different for each discharge tubing size.
ø7/8 (in.) → LA + LB : 147 ft. × 0.441 oz/ft. =65 oz (44.9m × 41 g/m = 1,841g)
ø3/4 (in.) →B : 7 ft. × 0.333 oz/ft. = 2 oz (2.1m × 31 g/m = 65g)
ø5/8 (in.) →LC + A : 23 ft. × 0.226 oz/ft. =5 oz (7m × 21 g/m = 147g)
ø1/2 (in.) →
1-1 + 2-1 + 3-1 + 4-1 : 157 ft. × 0.129 oz/ft. =20 oz (47.9m × 12 g/m = 575g)
Total 92 oz (Total 2,628g)
Additional refrigerant charge amount is 92 oz (2,628g).
Note 1) Amount of additional charge per liquid tubing length :418 oz (11,869g)
Note 2) Amount of additional charge for outdoor unit (combination number) :141 oz (4,000g)
Note 3) Amount of additional charge for all indoor unit cooling capacity :196 oz (5,560g)
Note 4) Amount of additional charge per discharge tubing length :92 oz (2,628g)
Total of additional refrigerant charge amount : 847 oz (24,057g)
Therefore, the total of additional refrigerant charge amount reaches 847 oz (24,057g).
● 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 refrigerant charge amount (shown in Table 6) at shipment in total cooling capacity of outdoor unit.
Refrigerant charge amount at shipment
(Total cooling capacity of outdoor unit) : : [168,000BTU/h] 586 oz [49.2kW] (16,600g)
Total of additional refrigerant charge amount :847 oz (24,057g)
Grand total 1,433 oz (40,657g)
Therefore, overall refrigerant charge amount of the system reaches 1,433 oz (40,657g).
Remark: Be sure to include the values in Table 11 Necessary Amount of Additional Refrigerant Charge Per Outdoor Unit.
CAUTION
CAUTION
Be sure to check the limit density for the room in which the indoor unit is installed.
Example:
Outdoor unit
Solenoid valve kit
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18
2. SELECTING THE INSTALLATION SITE
2-1. Outdoor Unit
AVOID:
● heat sources, exhaust fans, etc.
● 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.
● use lug bolts or equal to bolt down unit, reducing vibration
and noise.
Exhaust fan
Hot air
Heat
source
Out-
door
unit
Installation Space
Install the outdoor unit where there is enough space for
ventilation. Otherwise the unit may not operate properly.
The figure 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.
Wall height: Less than 1.7ft. (500mm)
Over 1 ft.(300mm)
* Over 2 in. (50mm)
* Over 2 in.
(50mm) Over 1.7ft. (500mm)
Wall height: Unlimited
Wall height: Less than 4.9 ft. (1500mm)
Over 2-3/8 in. (60mm)
Wall height:
Unlimited
Example: 2 units installation
* For other installation, follow the standards of combination
installation.
CAUTION
CAUTION
● Leave space open above the
unit.
● Construct louvers or other
openings in the wall, if
necessary, to ensure adequate
ventilation.
NOTE
●
Do not do any wiring or tubing within 1 ft. (300mm) of the
front panel, because this space is needed as a servicing
space for the compressor.
●
Ensure a base height of 4 in. (100mm) 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 6 in. (150mm) 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.
* When setting the anchor bolt to "B" or "C" (see page 21),
make enough space for installation operation.
(Space between units: Over 0.6 ft. (180mm), Space from
wall: Over 0.83 ft. (250mm))
* When installing a snow-proof ducting, make space between
the units 7-3/32 in. (180mm) regardless of the positions (A -
C) for installation holes.
* Make a walk-in space in front and behind the unit to ensure
ease of operation.
* If any obstacle exists above the air discharge outlet,
provide a minimum space of 7 ft.(2m) between the air
discharge outlet and a nearby obstacle. Make sure there is
no obstacle around the outdoor unit on four sides and the
place is well ventilated.
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19
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 7 ft. (2m) between the air-
discharge outlet and a nearby obstacle.
CAUTION
CAUTION
In regions with heavy snowfall,
the outdoor unit should be
provided with a solid, raised
platform and snow-proof
ducting (field supply).
Fallen snow
DO
AVOID
Without snow-
proof ducting
(Without platform)
With snow-
proof ducting
(High platform)
2-3. Installing the Outdoor Unit in Heavy Snow
Areas
In locations where wind-blown snow can be a problem,
snow-proof ducting (field supply) should be fitted to the unit
and direct exposure to the wind should be avoided as much as
possible.
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.
2-4. Precautions When Installing in Heavy Snow
Areas
a) The platform should be higher than the maximum snow
depth.
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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20
Front view Right side view
101-3/16
28-55/64
(733)
46-29/64
(1180)
45-19/32
(1158)
46-11/16
(1186)
(2570)
39-31/64
(1003)
5/64 (2) 3/64 (1)
2-5. Dimensions of Wind Ducting
Reference diagram for air-discharge chamber (field supply)
Note: Can be installed so that the air direction is to the front or rear direction.
unit: in. (mm)
Top view
Air direction: Rear direction
Air direction: Front direction
101-3/16
(2570)
28-55/64
(733)
46-29/64
(1180)
43-13/16
(1113)
45-19/32
(1158)
46-11/16
(1186)
39-31/64
(1003) 5/64 (2)3/64 (1)
Top view
Front view Right side view
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