Panasonic Inverter Air Conditioner R410A Technical Data And Service Manual

							1-55
1. Specifications
1-8 Noise Criterion Curves
 Outdoor Units
REMARKS:1. Value obtained in the actual place where the unit is installed may be slightly higher than the values shown
in this graph because of the conditions of operation, the structure of the building, the background noise and
other factors.
2. The test results were obtained from an nechoic room.
NOTE
To evaluate “Noise level” the maximum number of the measured OCTAVE BAND SOUND PRESSURE LEVEL is used.
Read the number on each BAND CENTER FREQUENCIES (horizontal axis) ranging from 63 Hz to 8000 Hz and select the
maximum value (vertical axis) among them.
 U-26PE1U6, U-26PS1U6
 U-42PE1U6, U-42PS1U6
 U-36PE1U6, U-36PS1U6
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							1-56
1. Specifications
1-9 Increasing the Fan Speed
Jumper cable
Jumper cable Electrical component box
(At shipment) (Jumper cable installed)
2159_M_I
Fan motor socket Fan
motor
900
Air Flow (CFM)
External Static Pressure
0 50
0 0.1 0.2
0.3
0.4 0.5
150
700 500 300
Limit line
L 100
1982_U_I
HHH
(Pa)
(inAq)
Limit lineHT
Air Flow (CFM)
External Static Pressure
0 50
0 0.1
0.2
0.3
0.4
0.5
0.6
0.8
150 200
500 1000
Limit line
LHHHHT 100
1983_U_I
(inAq)(Pa)
Limit line
NOTE
HT : Using the booster cable
H : At shipment
How to read the diagram
The vertical axis is the external static pressure (Pa) while the horizontal axis represents the AIR FLOW (CFM).
The characteristic curves for “HT”, “H”, “M” and “L” fan speed control are shown.
The nameplate values are shown based on the “H” air flow. For the 26 type, the air flow is 636 CFM, while the
external static pressure is 49 Pa at “H” position. If external static pressure is too great (due to long extension of
duct, for example), the air flow volume may drop too low at each air outlet.
This problem may be solved by increasing the fan speed as explained above. If external static pressure is too great (due to long extension
of ducts, for example), the air flow volume may drop too low
at each air outlet. This problem may be solved by increasing
the fan speed using the following procedure:
(1) Remove 4 screws on the electrical component box and
remove the cover plate.
(2) Disconnect the fan motor sockets in the box.
(3) Take out the jumper cable (sockets at both ends) clamped
in the box.
(4) Securely connect the jumper cable sockets
between the disconnected fan motor sockets in step 2.
(5) Place the cable neatly in the box and reinstall the cover
plate.
Indoor Fan Performance
e p y T   6 3 e p y T   6 2
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							1-57
1. Specifications
1-10 Air throw distance chart
 4-Way Cassette Type
03 7 10131720
0
3
7
10
13HORIZONTAL DISTANCE (ft.)
AXIS AIR VELOCITY (ft./sec)
VERTICAL DISTANCE (ft.)
AXIS AIR VELOCITY
2111_X_I
Model: 26 Type
Model: 36, 42 Type
: LOUVER ANGLE 20 in Cooling mode
: LOUVER ANGLE 60 in Heating mode
Condition Fan Speed : Hi
Room air temp. : 80F DB in cooling mode
68F DB in heating mode
03 7 10131720
0
3
7
10
13HORIZONTAL DISTANCE (ft.)
AXIS AIR VELOCITY (ft./sec)
VERTICAL DISTANCE (ft.)
AXIS AIR VELOCITY
2112_X_I
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							1-58
1. Specifications
1-10 Air throw distance chart
 Wall Mounted Type
COOLING - - - - - HEATING
FAN SPEED HIGH HIGH
ROOM AIR TEMP. 80°F70°F
FLAP ANGLE 0°, 22.5°, 45°45°, 67.5°
Axis air velocity (ft./sec.)
Vertical distance (ft.)
Horizontal distance (ft.)
10
135 0
Model: 26 Type
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							1-59
1. Specifications
1-10 Air throw distance chart
 Ceiling Type
Model: 26 Type
0371013172023262933
0
3
7
10
13
17HORIZONTAL DISTANCE (ft.)
AXIS AIR VELOCITY (ft./sec)
VERTICAL DISTANCE (ft.)2115_T_I
AXIS AIR VELOCITY
Model: 36 Type
2116_T_I
AXIS AIR VELOCITY 0371013172023262933
0
3
7
10
13
17HORIZONTAL DISTANCE (ft.)
AXIS AIR VELOCITY (ft./sec)
VERTICAL DISTANCE (ft.)
Model: 42 Type
2117_T_I
AXIS AIR VELOCITY
FAN SPEEDHEATING COOLING
ROOM AIR TEMP.
LOUVER ANGLEHIGH HIGH
68
° F 80°F
54
°– 7°
: COOLING
: HEATING
0 3 7 1013 172023262933
0
3
7
10
13
17HORIZONTAL DISTANCE (ft.)
AXIS AIR VELOCITY (ft./sec)
VERTICAL DISTANCE (ft.)
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							1-60
1. Specifications
1-11. ELECTRICAL WIRING
General Precautions on Wiring
(1)
as shown on its nameplate, then carry out the wiring 
closely following the wiring diagram.
(2)Before wiring, confirm the rated voltage of the unit 
Provide a power outlet to be used exclusively for 
each unit, and a power supply disconnect and circuit 
breaker for overcurrent protection should be provided 
in the exclusive line.
(3)
unit must be grounded.
(4)
with the wiring system diagram.
Wrong wiring may cause the unit to misoperate or 
become damaged.
(5)
compressor, or any moving parts of the fan.
(6)To prevent possible hazards from insulation failure, the 
Each wiring connection must be done in accordance 
Do not allow wiring to touch the refrigerant tubing, 
Unauthorized changes in the internal wiring can be 
very dangerous. The manufacturer will accept no 
responsibility for any damage or misoperation that 
occurs as a result of such unauthorized changes.
(7)
locality. For field wiring rules, must follow your LOCAL 
ELECTRICAL CODES before beginning.
You must ensure that installation complies with all 
relevant rules and regulations.
(8)Regulations on wire diameters differ from locality to 
To prevent malfunction of the air conditioner caused 
by electrical noise, care must be taken when wiring as 
follows:
 
The remote control wiring and the inter-unit
control wiring should be wired apart from the inter-
unit power wiring.
Use shielded wires for inter-unit control wiring
between units and ground the shield on one side
only.
(9)
it must be replaced by a repair shop appointed by 
the manufacturer, because special-purpose tools are 
required.
(10)If the power supply cord of this appliance is damaged, 
All wiring used must be Class 1.
Recommended Wire Length and Wire Diameter for Power Supply System
You must follow LOCAL ELECTRICAL CODES for wiring.
Outdoor Unit       
TypeTime delay fuse or
circuit capacity
U-26PE1U6 30 A
U-36PE1U6 35 A
U-42PE1U6 40 ATypeTime delay fuse or
circuit capacity
U-26PS1U6 25 A
U-36PS1U6 30 A
U-42PS1U6 35 A
Indoor Unit
TypeTime delay fuse or
circuit capacity
U1, K1, T1, F1 15 A
Control Wiring
(A) Inter-Unit Control Wiring (B) Remote Control Wiring (C) Control Wiring For Group Control
AWG #18
Use high voltage wire (300 V)
*1AWG #18*2
 (0.75 mm2) AWG #18*2
 - (0.75 mm2)
Max. 650 - ft. (Total) Max. 1,650 ft. Max. 3,300 ft.
AWG=American Wire Gauge
*1
 With ring-type wire terminal
*2
 Wire joint connection
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							1-61
1. Specifications
Inter-unit
power wiringPower wiring Inter-unit
control wiring
8P terminal board
Outdoor Unit
Indoor Unit
U1 U2 1 2 G L1 L2
Wiring System Diagrams
Basic wiring diagram for standard control
NOTE
Disconnect switch may be needed by the National/Local code.
ALWAYS COMPLY WITH NATIONAL AND LOCAL
CODE REQUIREMENTS.
NOTE
(1)
(2)
(B), (C) have no polarity. But for other wiring, respect 
polarity. Be sure to connect as shown in the Wiring 
System Diagram.
(3)Refer to Recommended Wire Length and Wire Diameter 
for Power Supply System for the explanation of “A”, “B” 
and “C” in the above diagrams.
Inter-Unit Control Wiring (A) and remote control wiring 
In case of separate supply connection to indoor unit, 
over current protection must be provided between 
power source and indoor unit.
MAXIMUM OVER CURRENT PROTECTION 15 A
(FUSE OR HACR TYPE CIRCUIT BREAKER)
U2
L2
U1L1L1
L2
U1U2
L2L1
21WHT
Remote
ControllerB
C
Indoor
unitL1
L2
Grounding line
BLK21
Inter-unit power line
208 / 230 V, 60 Hz, 1-PHPower supply
208 / 230 V, 60Hz, 1-PH
Grounding line
A
Outdoor unit
INV unit
12
G
*
U2 U1L1
L2
U1U2
Indoor
unitL1
L2
Grounding line
Inter-unit power line
208 / 230 V, 60 Hz, 1-PHPower supply
208 / 230 V, 60Hz, 1-PH
Grounding line
A
Outdoor unit
INV unit
12
G
** Disconnect switch
Field supply
Wire joint 
connection
Wire joint 
connection
Unit
control
Line Power
supplyRemote
control
Line
5P terminal board 
L1 L2
U1 U2
K1 Type
L1 L2
Unit
control
Line
U1
Power
supply
U2
5P terminal board 
U1, T1, F1 Types
Remote
control
Line
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							1-62
1. Specifications
WARNINGLoose wiring may cause the
terminal to overheat or result
in unit malfunction. A fire
hazard may also exist.
Therefore, ensure that all
wiring is tightly connected.
How to Connect Wiring to the Terminal
 For stranded wiring
(1) Cut the wire end with a wire cutter or wire-cutting 
pliers, then strip the insulation to expose the stranded 
wiring about 3/8 in. (Fig. 1-1)
(2) Using a Phillips head screwdriver, remove the terminal 
screw(s) on the terminal plate.
(3) Using a ring connector fastener or pliers, securely 
clamp each stripped wire end with a ring pressure 
terminal. (Fig. 1-1)
(4) Place the ring pressure terminal, and replace 
and tighten the removed terminal screw using a 
screwdriver. (Fig. 1-2) When connecting each power wire to the corresponding 
terminal, follow the instructions on “How to connect wiring 
to the terminal” and fasten the wire securely with the fixing 
screw of the terminal plate.
Fig. 1-2 Fig. 1-1
Stranded wire
Ring
pressure
terminal 
Strip 3/8 in.
Screw and 
Special washer
Ring 
pressure 
terminal
Wire
Terminal plateRing pressure 
terminalScrew Special 
washer
Wire
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							1-63
1. Specifications
1-12. Installation Instructions
1. Tubing SizeOutdoor Unit
Single type
 
Refrigerant tubing between the indoor and outdoor units
should be kept as short as possible.
The length of the refrigerant tubes between the indoor
and outdoor units are limited by the elevation difference
between the 2 units. During tubing work, try to make both
the tubing length (L) and the difference in elevation (H1)
as short as possible. Refer to Table 1-2.
Table 1-1
Indoor unit type 26, 36 types 42 type
165 ft. 165 ft. Maximum length
Charge-less tubing length (actual length) 10 – 100 ft. 15 – 100 ft.
0.43 oz. Additional charge per 1 ft.
Maximum indoor-outdoor
height differenceIf outdoor unit is higher H1
H1 100
If outdoor unit is lower
 50
Single
Main tubing L
H1
Table 1-2 Tubing Data for Models
U-26PE1U6
U-26PS1U6U-36PE1U6
U-36PS1U6U-42PE1U6
U-42PS1U6
Tubing size
outer diameterLiquid tube in. (mm) 3/8 (9.52) 3/8 (9.52) 3/8 (9.52)
Gas tube in. (mm) 5/8 (15.88) 5/8 (15.88) 5/8 (15.88)
165 165 165 (ft.)
(ft.)
(ft.)
(ft.) Limit of tubing length
Limit of elevation
difference between
the 2 unitsOutdoor unit is placed
100 100 100
higher.
Outdoor unit is placed
50 50 50
lower.
Max. allowable tubing length at shipment 10 – 100 10 – 100 10 – 100
Required additional refrigerant *
1(oz./ft.) a) 0.43 b) 0.43 b) 0.43
Refrigerant charged at shipment (lbs.) 4.2 6.2 7.9
No additional charge of compressor oil is necessary.
*1 If total tubing length becomes 100 to 165 ft., charge additional refrigerant by 0.43 oz./ft.
Table 1-3 List of Connection Tube Sizes
Main tubing (L)
Type capacity of indoor units 26 – 42
Gas tube ø5/8
Liquid tube ø3/8
Amount of additional charge per 1 ft.0.43 oz.
Tubing DataModels
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							1-64
1. Specifications
CAUTION
1. This unit requires no additional refrigerant charge up to 100 ft. tubing length.
In case of more than 100 ft., additional refrigerant charge is required. Refer to Table 
1-3.
2. In case of multi type installation, indoor units should be installed within the same 
room. If multi type indoor units are installed in different rooms, temperature control 
may develop problems because thermostat operation must follow the thermostat 
condition of 1 indoor unit only (the main unit).
WARNINGAlways check the gas density for the room in which the unit is installed.
2. Check of density limit
The room in which the air conditioner is to be 
installed requires a design that in the event of 
refrigerant gas leaking out, its density will not exceed 
a set limit.
The refrigerant (R410A), which is used in the air
conditioner, is safe, without the toxicity or combustibility of
ammonia, and is not restricted by laws imposed to protect
the ozone layer. However, since it contains more than air,
it poses the risk of suffocation if its density should rise
excessively. Suffocation from leakage of
refrigerant is almost non-existent.
With the recent increase in the number of high density
buildings, however, the installation of multi air conditioner
systems is on the increase because of the need for
effective use of floor space, individual control, energy
conservation by curtailing heat and carrying power, etc.
Most importantly, the multi air conditioner system is able
to replenish a large amount of refrigerant compared to
conventional individual air conditioners. If a single unit of
the multi air conditioner system is to be installed in a small
room, select a suitable model and installation procedure
so that if the refrigerant accidentally leaks out, its density
does not reach the limit (and in the event of an 
emergency, measures can be made before injury can 
occur).
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 per 1,000 cubic feet for R410A refrigerant.
For additional guidance and precautions related to
refrigerant safety, please refer to the following documents:
International Mechanical Code 2009 (IMC-2009)
(or more recently revised)
ASHRAE 15
ASHRAE 34
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