Panasonic S-07MD1U6, U-144MF2U9, U-96MF2U9, U-120MF2U9, S-09MD1U6 Installation Instructions Manual
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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
• To be connecting Indoor Unit
Type Indoor Unit Type
D1 1-Way Cassette S-07MD1U6 S-09MD1U6 S-12MD1U6
U2 4-Way Cassette 36" × 36"
Y2 4-Way Cassette 24" × 24" S-12MY2U6 S-18MY2U6
K2 Wall Mounted S-07MK2U6 S-09MK2U6 S-12MK2U6 S-18MK2U6
T2 Ceiling S-12MT2U6 S-18MT2U6
F2 Concealed Duct - Medium Static S-07MF2U6 S-09MF2U6 S-12MF2U6 S-15MF2U6 S-18MF2U6
M2 Concealed Duct - Low Static S-07MM2U6 S-09MM2U6 S-12MM2U6 S-15MM2U6 S-18MM2U6
E1 Concealed Duct - High Static
P1 Floor Standing S-07MP1U6 S-09MP1U6 S-12MP1U6 S-15MP1U6 S-18MP1U6
R1 Concealed Floor Standing S-07MR1U6 S-09MR1U6 S-12MR1U6 S-15MR1U6 S-18MR1U6
7 9 12 15 18
Nominal Capacity
Type Indoor Unit Type
D1 1-Way Cassette
U2 4-Way Cassette 36" × 36" S-24MU2U6 S-36MU2U6
Y2 4-Way Cassette 24" × 24"
K2 Wall Mounted S-24MK2U6
T2 Ceiling S-24MT2U6
F2 Concealed Duct - Medium Static S-24MF2U6 S-36MF2U6 S-48MF2U6 S-54MF2U6
M2 Concealed Duct - Low Static
E1 Concealed Duct - High Static S-36ME1U6 S-48ME1U6
P1 Floor Standing S-24MP1U6
R1 Concealed Floor Standing S-24MR1U6
24 36 48 54
Nominal Capacity
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.
85464369843022 CV6233323510
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.
This symbol refers to a hazard or
WARNING
CAUTION
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
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 fire 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 fire in case of equipment breakdown or
insulation breakdown.
unsafe practice which can result
in severe personal injury or death.
This symbol refers to a hazard or
unsafe practice which can result
in personal injury or product or
property damage.
When Wiring
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.
Keep the fire alarm and the air
CAUTION
…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.
outlet at least 5 feet (1.5 m) away
from the unit.
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
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.
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 flame,
it produces a toxic gas.
• Do not add or replace refrigerant other than
specified type. It may cause product damage,
burst and injury, etc.
2
• 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 .
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 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 toxic gas.
WARNING
• This product must not be modified or
disassembled under any circumstances.
Modified or disassembled unit may cause fire,
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.
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.
Others
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.
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 define
safeguards related to the use of refrigerants, all of which
define a Refrigerant Concentration Level (RCL) of
25 pounds (11.3 kg) per 1,000 cubic feet (28.3 m
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
3
) for
3
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”.
●
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.
Use sufficient care in handling the tubing. Seal the tubing ends with caps or tape to
CAUTION
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.
prevent dirt, moisture, or other foreign substances from entering.
These substances can result in system malfunction.
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.
R407C tools
Item
Manifold gauge Yes No
Charge hose Yes No To resist higher pressure, material must be changed.
Vacuum pump Yes Yes
Leak detector Yes No
Flaring oil Yes No
* Using tools for R22 and R407C and new tools for R410A together can cause defects.
New
tools?
compatible
with R410A?
Remarks
Types of refrigerant, refrigerating machine oil, and
pressure gauge are different.
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 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.
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.
Manifold gauge
Vacuum pump
Outlet
Inlet
4
3-2. Use R410A exclusive cylinder only.
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.
Valve
Single-outlet valve
(with siphon tube)
Liquid refrigerant should be recharged
with the cylinder standing on end as
shown.
Liquid
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)
5
CONTENTS
Page Page
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
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 . . . . . . . . . . . . . 34
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 . . . . . . . . . . . . . . . . . . . . . . . . . 37
Air Purging with a Vacuum Pump (for Test Run)
n
Preparation
7. TEST RUN . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
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
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
6
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.
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.
Check local electrical codes and
CAUTION
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
Table 1 Outdoor Unit
Part name Figure
Outer
diameter
ø1-1/8"(ø28.58)
Connection
tubing
Operating
Instructions
Installation
Instructions
Outer
diameter
ø7/8"(ø22.22)
Outer
diameter
ø3/4"(ø19.05)
Inner
diameter
ø3/4"(ø25.4)
Inner
diameter
ø3/4"(ø19.05)
Inner
diameter
ø5/8"(ø15.88)
paper
paper
Q’ty
U-72MF2U9
(6 ton)
U-96MF2U9
(8 ton)
U-120MF2U9
(10 ton)
0 0 1 1
0 0 1 1
0 1 0 0
1 1 1 1
1 1 1 1
7
U-144MF2U9
(12 ton)
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.
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.
H3
C
Balance tubing
(ø1/4" (6.35mm))
1st distribution joint for outdoor unit
1st distribution joint (for indoor unit)
B
Explanation of symbols
Distribution joint
(CZ: optional parts)
Ball valve (field supply)
T-joint (field supply)
Solidly welded shut
(pinch weld)
LO
LM
A
LA
LF
Max.1.3 ft (40cm)
LG
LC
LB
For
extension
Max.1.3 ft (40cm)
L4
LD
For
extension
LH
5
1
L1
L2
6
Solenoid valve kit
2
R410A optional distribution joint
CZ-P900PH1U (for outdoor unit)
CZ-P224BH1U (for indoor unit)
CZ-P680BH1U (for indoor unit)
L3
51
50
4
3
52
H2
CZ-P1350BH1U (for indoor unit)
H1
2-1
2-2
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
Item Mark Contents Length
Actual length
Equivalent length
Allowable tubing
length
Allowable elevation
difference
Allowable length of
joint tubing
L1 Max. tubing length
L (L2 – L4)
Difference between max. length and min.
length from the 1st distribution joint
Max. length of main tubing (at maximum size)
LM
* Even after 1st distribution joint, LM is allowed if at
maximum tubing length.
1, 2~ 52 Max. length of each distribution tube
L1 + 1 + 2~ 51 + A
+ B + LF + LG + LH
A, B + LO, C + LO
Total max. tubing length including length of each distribution
tube (only liquid tubing)
Maximum tubing length from outdoor’s 1st distribution
joint to each outdoor unit
1-2, 2-2~ 52-2 Max. length between solenoid valve kit and indoor unit
H1
When outdoor unit is installed higher than indoor unit
When outdoor unit is installed lower than indoor unit
H2 Max. difference between indoor units
H3 Max. difference between outdoor units
L3
T-joint tubing (field-supply); Max. tubing length between the
first T-joint and solidly welded-shut end point
4-1
3-1
656 (200)*
689 (210)*
164 (50)*
164 (50)*
1640 (500)
98 (30)
164 (50)
131 (40)
4
4-2
3-2
unit: ft. (m)
-
33 (10)
49 (15)
13 (4)
6.6 (2)
5
3
*
6
2
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.
8
*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)
BTU/h
(kW)
Total system
tonnage
Suction
tubing
Discharge
tubing
Liquid tubing
72,000
(21.1)
ø3/4"
(ø19.05)
ø5/8"
(ø15.88)
96,000
(28.1)
6 8 10 12 14 16 18 20 22 24 26 28 30
ø7/8"
(ø22.22)
ø3/4"
(ø19.05)
ø3/8"
(ø9.52)
120,000
(35.2)
(ø12.7)
ø1/2"
144,000
(42.2)
(ø22.22)
ø7/8"
168,000
(49.2)
ø1-1/8"
(ø28.58)
192,000
(56.3)
ø5/8"
(ø15.88)
216,000
(63.3)
240,000
(70.3)
264,000
(77.4)
288,000
(84.4)
ø1-3/8"
(ø34.92)
ø1-1/8"
(ø28.58)
(ø19.05)
312,000
(91.4)
ø3/4"
* 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.
Size of tubing (LO) between outdoor units
n
Select the size of tubing between outdoor units based on the main tubing size (LA) as given in the table above.
336,000
(98.5)
Unit: in. (mm)
360,000
(105.5)
ø1-5/8"
(ø41.28)
Table 4 Main Tubing Size After Distribution (LB, LC...)
24,200
(7.09)
ø5/8"
(ø15.88)
ø1/2"
(ø12.7)
ø3/8"
(ø9.52)
238,900
(70.0)
200,600
(58.8)
ø1-1/8"
(ø28.58)
ø1-1/8"
(ø28.58)
ø5/8"
(ø15.88)
Total capacity
after distribution
Tubing size
Total capacity
after distribution
Tubing size
Below BTU/h (kW)
Over BTU/h (kW) –
Suction tubing
Discharge tubing
Liquid tubing
Below BTU/h (kW)
Over BTU/h (kW)
Suction tubing
Discharge tubing
Liquid tubing
Table 5 Outdoor Unit Tubing Connection Size (
BTU/h
(kW)
Suction tubing
Discharge
tubing
Liquid tubing
Balance tubing
72,000
(21.1)
1
ø3/4" *
(ø19.05) *
ø5/8" (ø15.88) ø3/4" (ø19.05) ø7/8" (ø22.22)
Flare connection
ø3/8" (ø9.52) ø1/2" (ø12.7)
1
96,000
(28.1)
2
ø7/8" *
(ø22.22)*
2
Brazing connection
Flare connection
ø1/4" (ø6.35)
Flare connection
54,600
(16.0)
24,200
(7.09)
ø3/4"
(ø19.05)
ø5/8"
(ø15.88)
ø3/8"
(ø9.52)
340,000
(99.6)
238,900
(70.0)
ø1-3/8"
(ø34.92)
ø1-1/8"
(ø28.58)
ø3/4"
(ø19.05)
A
–
120,000
(35.2)
ø1-1/8"
(ø28.58)
Brazing connection
C
)
85,300
(25.0)
54,600
(16.0)
(ø19.05)
(ø15.88)
(ø9.52)
340,000
(99.6)
ø1-5/8"
(ø41.28)
ø1-1/8"
(ø28.58)
(ø19.05)
ø3/4"
ø5/8"
ø3/8"
–
ø3/4"
Unit: in. (mm)
144,000
(42.2)
Unit: in. (mm)
102,400
(30.0)
85,300
(25.0)
ø7/8"
(ø22.22)
ø3/4"
(ø19.05)
ø3/8"
(ø9.52)
124,200
(36.4)
102,400
(30.0)
ø1-1/8"
(ø28.58)
ø3/4"
(ø19.05)
ø1/2"
(ø12.7)
143,300
(42.0)
124,200
(36.4)
ø1-1/8"
(ø28.58)
ø7/8"
(ø22.22)
ø1/2"
(ø12.7)
162,400
(47.6)
143,300
(42.0)
ø1-1/8"
(ø28.58)
ø7/8"
(ø22.22)
ø1/2"
(ø12.7)
200,600
(58.8)
162,400
(47.6)
ø1-1/8"
(ø28.58)
ø7/8"
(ø22.22)
ø5/8"
(ø15.88)
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.
ex.) Type 72
Balance tube
Liquid tube
Discharge tube Suction tube
9
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
Solenoid valve
kit-Indoor unit
tubing
connection
Suction tubing ø5/8" (ø15.88)
Discharge tubing ø1/2" (ø12.7)
Liquid tubing ø3/8" (ø9.52)
Gas tubing ø1/2" (ø12.7) ø5/8" (ø15.88)
Liquid tubing ø1/4" (ø6.35) ø3/8" (ø9.52)
*1: For the solenoid valve kits, use type 160 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 8 Straight Equivalent Length of Joints
Tubing size (in. (mm))
90° elbow
45° elbow
U-shape tube bent (R2-3/8" – 4" (60 – 100mm))
Trap bend
Y-branch distribution joint
1/2"
(12.7)
1
(0.30)
0.8
(0.23)
3
(0.90)
7.5
(2.30)
5/8"
(15.88)
1.1
(0.35)
0.9
(0.26)1(0.32)
3.4
(1.05)
9.2
(2.80)
Equivalent length conversion not needed.
3/4"
(19.05)
1.4
(0.42)
4.1
(1.26)
10.5
(3.20)
7/8"
(22.22)
1.6
(0.48)
1.2
(0.36)
4.7
(1.44)
12.5
(3.80)
1-1/8"
(28.58)
1.9
(0.57)
1.4
(0.43)
5.6
(1.71)
15.4
(4.70)
1-3/8"
(34.92)
2.5
(0.76)
1.8
(0.55)
7.4
(2.26)
19.2
(5.85)
Unit: ft. (m)
1-5/8"
(41.28)
2.8
(0.85)
2.0
(0.61)
8.4
(2.56)
22.3
(6.80)
Ball valve for service Equivalent length conversion not needed.
Table 9 Refrigerant tubing (Existing tubing can be used.)
Tubing size (in. (mm))
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)
* 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.
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
Additional amount
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)
oz/ft. 0.279 0.602 1.38 1.99 2.78 3.93
(g/m) (26) (56) (128) (185) (259) (366)
10
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 1 2 3
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
Additional amount
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)
oz/ft. 0.129 0.226 0.333 0.441 0.763 1.118
(g/m) (12) (21) (31) (41) (71) (104)
* Additional refrigerant charge amount of discharge tubing should be less than 317 oz (9,000g).
1-9. System Limitations
Table 13 System Limitations
Max. No. allowable connected outdoor units 3 *
Max. capacity allowable connected outdoor
units
360,000 BTU/h
(30 ton, 105.5 kW)
Max. connectable indoor units 52 *
Max. allowable indoor/outdoor capacity ratio 50 – 150 % *
2
1
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 1 2 3
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
6 14 16 38
8 19 18 43
10 24 20 48
12 28 22~30 52
14 33
Number of
indoor units
11
1-10. Installation Standards
Relationship between A/C units and refrigerant tubing
Outdoor unit
4-tube layout 3-tube layout 2-tube layout
Suction tube
Discharge tube
Liquid tube
Balance tube
Outdoor unit Outdoor unit
Suction tube
Discharge tube
Liquid tube
Solenoid
valve kit
Gas tube
Liquid tube
● 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 floor or that cannot be touched.
Strongly recommended installation
Room
Indoor unit
Hallway
Room
Indoor unit
Room
Indoor unit
Hallway
Solenoid
valve kit
Avoid
Room
Indoor unit
Solenoid
valve kit
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
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.
12
1-12. Installing Distribution Joint
15〜90°
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
How to install
branch tubing
B
A
Horizontal
* In case of common use solenoid valve kit
When connecting to A When connecting to B
B
A
D
Straight tubing
length over
8 in. (200mm)
Arrow view D
When connecting branch tubing to indoor unit directly
Suction tube
15〜90°
Not restricted
Straight tubing
length over
8 in. (200mm)
Horizontal
Straight tubing length
over 8 in. (200mm)
or
15〜90°
15〜30°
(Branch tubing
angle)
Liquid tube / Discharge tube
0〜30°
(Branch tubing
angle)
When not connecting
branch tubing to indoor
unit directly
Suction tube /
Discharge tube /
Liquid tube
Horizontal
Upward
Vertical
Downward
15〜90°
Header branch system
Outdoor
Indoor
6.5 ft. (2m)
(From 1st branch to tip
of solidly welded part)
Horizontal line
Install at a positive angle
Vertical
Straight tubing
length over
8 in. (200mm)
Vertical
(Main tubing is horizontal.)
Indoor
Install at a positive angle
Indoor
(15~30°)
Vertical
Straight tubing
length over
8 in. (200mm)
Vertical
Horizontal line
(15~30°)
Solidly welded shut (X)
Vertical
Vertical
15〜90°
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.
13
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 307,100 BTU/h (90.0kW) or less 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 460,700 BTU/h (135.0kW) or less* For indoor unit
Tubing size (with thermal insulation)
n
1. CZ-P900PH1U
For outdoor unit (Capacity after distribution joint is 307,100 BTU/h (90.0kW) or less.)
Note that the dimension marked with every alphabetical letter in the diagram shows the inner diameter.
* 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.
B
C
Distribution
Joint
Suction tube
11-13/16
(300)
#C
#C
D
E
Insulation Insulation
D
C
E
DE
C
Discharge tube Liquid tube
11-13/16
(300)
#C
C
#C
D
E
F
FD E
F
G
H
I
E
13-25/64
(340)
Insulation
G
F
E
E FG
H I
Unit: in. (mm)
*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.
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)
14
Table 17 Dimensions for connections of each part
Unit: in. (mm)
Position A B C D E F G H I J
Dimension
. CZ-P224BH1U
2
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) –
Use: For indoor unit (Capacity after distribution joint is 76,400 BTU/h (22.4kW) or less.)*
Example: (F below indicates inner diameter.
Suction tube
F
below indicates outer diameter.)
Discharge tube Liquid tube
2–11/64
(55)
8–17/64
(210)
F
F
G
F
5–45/64
(145)
F
G H
F
F
G
H
2–11/64
(55)
3–5/8 15/32
(12)
(92)
1–37/64
(40)
7–21/64
(186) (235)
H
G
5–23/64
(136)
H
HH
H
H
G
(7)
G
(77)
3–1/32 9/32
9–1/4
I
H
H II H
(69)
2–23/32
Thermal insulation
Thermal insulation Thermal insulation
. CZ-P680BH1U
3
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.
Suction tube
11-13/16
(300)
FE
C
D
#C
#C
D
E
Insulation Insulation
F
G
D FE
G
F E D
Discharge tube
11-13/16
(300)
C
#D
#D
E
F
G
H
EF
GH
GFE
H
I
Liquid tube
I
H
G
F
E
13-25/64 (340)
Insulation
*Insulators for both the Suction tube and the Discharge tube are the same.
Unit: in. (mm)
E FG
HI
Unit: in. (mm)
*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.
. CZ-P1350BH1U
4
Use: For indoor unit (Capacity after distribution joint is greater than 232,000 BTU/h (68.0kW) and no more than 460,700 BTU/h (135.0kW).)*
Example: (B below indicates inner diameter. B below indicates outer diameter.)
Suction tube • Discharge tube
H
G
（55）
2–11/64
F
F
E
D
C
C
A
B
BBC
B
B B
3–35/64
(90) (105) (112)
4–9/64 4–13/32
（45）
1–49/64
I
C
C
H
E CDA FF E AD C
Liquid tube
I
H
G
G
F
G
E
G
F
E
G
E
G
F
13–25/64
(340) (50)
H I
5–1/8
1–31/32
(130)
Thermal insulation Thermal insulation
* 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.
Unit: in. (mm)
15
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)
or
g
Unit of account (
Required additional
refrigerant charge (g)
)
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
+ 0.763 × (A) + 0.441 × (B) + 0.333 × (C) + 0.226 × (D) + 0.129 × (E)
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) :
(b) : Liquid tubing Total length of ø3/4" (ft.) or (m) (B) :
(c) : Liquid tubing Total length of ø5/8" (ft.) or (m) (C) :
(d) : Liquid tubing Total length of ø1/2" (ft.) or (m) (D) :
(e) : Liquid tubing Total length of ø3/8" (ft.) or (m) (E) :
(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.
●
1. R410A additional charging absolutely must be done through liquid charging.
CAUTION
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.
For type 72 For type 96 For type 120/144
Discharge tubing
Discharge tubing
Discharge tubing
Discharge tubing
Discharge tubing
Total length of ø1-1/8" (ft.) or (m)
Total length of ø7/8" (ft.) or (m)
Total length of ø3/4" (ft.) or (m)
Total length of ø5/8" (ft.) or (m)
Total length of ø1/2" (ft.) or (m)
4
2
3
Suction tube
1
Use a flathead
screwdriver and open
by turning the part with
the screw groove to the
right, from “ –” to “ | ”.
Discharge tube
2
(For type 72/96)
Use a hex wrench (width
15/64 inch (6mm)) and
turn to the left to open.
2
3
1
(For type 120/144)
Use a flathead
screwdriver and open
by turning the part with
the screw groove to the
right, from “ –” to “ | ”.
16
4
4
2
3
1
Liquid tube
3
Use a hex wrench (width
5/32 inch (4mm)) and
turn to the left to open.
1
Balance tube
4
Use a flathead
screwdriver and open
by turning the part with
the screw groove to the
right, from “ –” to “ | ”.
Example:
Outdoor unit
Example of each tubing length
●
Main tubing Distribution joint tubing
LA = 131 ft. (40m) Outdoor side Indoor side
Type 96
●
Type 72
LB = 16 ft. (4.9m)
LC = 16 ft. (4.9m)
B
A
LA
LB
1-1 2-1 3-1 4-1
1 2 3 4
Type 48 Type 48 Type 48 Type 36
LC
Obtain liquid tubing size from Tables 3, 4, 5, 7 and 10.
A = 7 ft.
B = 7 ft.
(2.1m)
(2.1m)
Solenoid valve kit
1 = 98 ft.
2 = 16 ft.
3 = 16 ft.
4 = 65 ft.
(30m)
(4.9m)
(4.9m)
(19.8m)
1-1 = 82 ft.
2-1 = 13 ft.
3-1 = 13 ft.
4-1 = 49 ft.
(25m)
(4m)
(4m)
(15m)
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))
The longest tubing length in this example
(LA = 131 ft. (40m))
LC = ø3/8 (in.) (Total capacity of indoor unit is 83,800 BTU/h (24.6kW))
Distribution joint tubing
Outdoor side
Indoor side 1-1: ø
Obtain discharge tubing size from Tables 3, 4 and 12.
●
A: ø3/8 (in.) B: ø3/8 (in.) (from outdoor unit connection tubing)
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)
Main tubing
LA = ø7/8 (in.) LB = ø7/8 (in.) LC = ø5/8 (in.)
Distribution joint tubing
Outdoor side
Indoor side
Obtain additional charge amount for each tubing size and additional refrigerant charge amount for outdoor unit and all indoor units cooling capacity.
●
A: ø5/8 (in.) B: ø3/4 (in.) (from outdoor unit connection tubing)
1: ø5/8 (in.) 2: ø5/8 (in.) 3: ø5/8 (in.)
4: ø5/8 (in.) (from solenoid valve kit connection tubing)
Note 1: The charge amounts per 1 ft. are different for each liquid tubing size.
ø5/8 (in.)
ø1/2 (in.)
ø3/8 (in.)
LA : 131 ft. × 1.99 oz/ft. = 261 oz (40m × 185 g/m = 7,400g)
→
LB : 16 ft. × 1.38 oz/ft. = 22 oz (4.9m × 128 g/m = 627g)
→
→
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 + 300
= 52.6 x 1000 x 0.1 + 300 = 5,560 g)
g
Note 4: The charge amounts per 1 ft. are different for each discharge tubing size.
ø7/8 (in.)
ø3/4 (in.)
ø5/8 (in.)
ø1/2 (in.)
LA + LB : 147 ft. × 0.441 oz/ft. = 65 oz (44.9m × 41 g/m = 1,841g)
→
B : 7 ft. × 0.333 oz/ft. = 2 oz (2.1m × 31 g/m = 65g)
→
→
→
LC +
A : 23 ft. × 0.226 oz/ft. = 5 oz (7m × 21 g/m = 147g)
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
Be sure to check the limit density for the room in which the indoor unit is installed.
17
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
Outdoor
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.
source
Leave space open above the
●
CAUTION
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. (0.3m) of the front
●
panel, because this space is needed as a servicing space
for the compressor.
Ensure a base height of 4" (10cm) 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" (15cm) 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” (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.
Example: 2 units installation
* For other installation, follow the standards of combination
installation.
Wall height: Less than 1.7ft. (500mm)
Wall height:
Unlimited
* Over 2 in.
(50mm)
Over 2-3/8 in. (60mm)
Over 1 ft.(300mm)
* Over 2 in. (50mm)
Wall height: Unlimited
Wall height: Less than 4.9 ft. (1500mm)
Over 1.7ft. (500mm)
18
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