Panasonic CU-2E18SBU v2 Installation Manual
en
Panasonic Corporation 2016
Order No: PAPAMY1604017CE
Outdoor Unit CU-2E18SBU
Please file and use this manual together with the service manual for Model No. CS-ME5RKUA CS-ME7RKUA, CS-E9RKUA CS-E12RKUA, CS-ME9SB4U, CS-E12RB4UW, CS-ME5SD3UA CS-ME7SD3UA, CS-E9SD3UAW CS-E12SD3UAW, Order No. PAPAMY1503085CE, PAPAMY1501049CE, PAPAMY1604059CE, PAPAMY1503095CE, PAPAMY1604056CE, PAPAMY1604052CE.
WARNING This service information is designed for experienced repair technicians only and is not designed for use by the general public. It does not contain warnings or cautions to advise non-technical individuals of potential dangers in attempting to service a product. Products powered by electricity should be serviced or repaired only by experienced professional technicians. Any attempt to service or repair the product or products dealt with in this service information by anyone else could result in serious injury or death.
PRECAUTION OF LOW TEMPERATURE In order to avoid frostbite, be assured of no refrigerant leakage during the installation or repairing of refrigerant circuit.
Installation Manual
6
Item Unit OUTDOOR UNIT
Air Volume High m3/min (ft3/min) 41.0 (1447)
Refrigerant Control Device Expansion Valve
Refrigerant Oil cm3 FV50S (900)
Refrigerant (R410A) g (oz) 2.23k (78.7)
Dry Bulb Wet Bulb
Indoor Operation Range
Cooling Maximum C (F) 32 (89.6) 23 (73.4)
Minimum C (F) 16 (60.8) 11 (51.8)
Heating Maximum C (F) 30 (86.0)
Minimum C (F) 16 (60.8)
Outdoor Operation Range
Cooling Maximum C (F) 46 (114.8) 26 (78.8)
Minimum C (F) -10 (14.0) /
Heating Maximum C (F) 24 (75.2) 18 (64.4)
Minimum C (F) -15 (5.0) -16 (3.2)
Note Specifications are subject to change without notice for further improvement.
Multi split combination possibility:
o A single outdoor unit enables air conditioning of up to two separate rooms for CU-2E18SBU.
Outdoor Unit
CU-2E18SBU
A B
W al
l
1.6 kW CS-ME5RKUA, CS-ME5SD3UA 2.0 kW CS-ME7RKUA, CS-ME7SD3UA 2.5 kW CS-E9RKUAW, CS-ME9SB4U, CS-E9SD3UAW 3.2 kW CS-E12RKUAW, CS-E12RB4UW, CS-E12SD3UAW
Capacity range of connectable indoor units From 3.2 kW to 6.4 kW
P ip
in g
Le ng
th 1 room maximum pipe length (m (ft)) 25 (82.0)
Allowable elevation (m (ft)) 15 (49.2)
Total allowable pipe length (m (ft)) 50 (164.0)
Total pipe length for maximum chargeless length (m (ft)) 20 (65.6)
Additional gas amount over chargeless length (g/m (oz/ft)) 20 (0.2)
Note: : Available Remarks for CU-2E18SBU 1. At least two indoor units must be connected. 2. The total nominal cooling capacity of indoor units that will be connected to outdoor unit must be within connectable capacity range of indoor unit. (as shown in the table above) Example: The indoor units combination below is possible to connect to CU-2E18SBU. (Total nominal capacity of indoor units is between 3.2 kW to 6.4 kW) 1) Two CS-E9RKUAW only. (Total nominal cooling capacity is 5.0 kW) 2) One CS-E9RKUAW and one CS-E12RKUAW. (Total nominal cooling capacity is 5.7 kW) Specifications are subject to change without notice for further improvement.
15
9. Installation Information
9.1 Check Points
Total maximum pipe length: 164 ft
49.2 ft max.
82 ft
82 ft
QUICK GUIDE PIPING AND ELECTRICAL SPECIFICATION Indoor (ID) & Outdoor (OD) units: Possible Combination Patterns
Capacity (Btu/h)
Refrige- rant
Piping size Standard
pipe length
Max. Eleva-
tion
Min. pipe
length for
each ID unit
Max. from
OD to each
ID unit
Max. total
length
Min. total pipe
length for
additional gas
Addi- tional refri- ge- rant
Power supply
Power supply wire size
OD-ID connection wire size Gas Liquid
Outdoor (OD): CU-2E18SBU Indoor (ID): 2 UNITS OF CS- E9RKUAW
16700 R410A 3/8 (9.52mm)
1/4 (6.35mm) 24.6 ft See
Step 1 9.8 ft 82.0 ft 164.0 ft 65.6 ft 0.2 oz / ft
208/230V 60 Hz
MCA 20A MOP 25A
AWG12 AWFG16
Outdoor (OD): CU-2E18SBU Indoor (ID): 2 UNITS OF CS- E12RKUAW Outdoor (OD): CU-2E18SBU Indoor (ID): 1 UNIT OF CS- E9RKUAW + 1 UNIT OF CS-E12RKUAW
Example: If total piping length of all installed indoor units is at 68.6 ft, the quantity of additional refrigerant should be 0.6 oz ...... (68.6 - 65.6) ft x 0.2 oz/ft = 0.6 oz.
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10. Installation Instruction IMPORTANT
This product has been designed and manufactured to meet ENERGY STAR criteria for energy efficiency when matched with appropriate coil components. However, proper refrigerant charge and proper air flow are critical to achieve rated capacity and efficiency. Installation of this product should follow the manufacturers refrigerant charging and air flow instructions. Failure to confirm proper charge and airflow may reduce energy efficiency and shorten equipment life.
10.1 Accessories Supplied with Outdoor Unit The following parts are supplied as accessories with each outdoor unit.
Check that all accessory parts are present before installing the outdoor unit.
HEAT PUMP-TYPES ONLY
Part name Qty. Diagram Application
Drain elbow 1
For connecting the drain pipe
10.2 Cutting and Flaring the Piping
1 Please cut using pipe cutter and then remove the burrs. 2 Remove the burrs by using reamer. If burrs is not removed, gas leakage may be caused.
Turn the piping end down to avoid the metal powder entering the pipe. 3 Please make flare after inserting the flare nut onto the copper pipes.
Reamer
2. To remove burrs
Point down
Pipe
1. To cut
Bar
0 1/32" (0-0.5 mm)
Copper pipe
When properly ared, the internal surface of the are will evenly shine and be of even thickness. Since the flare part comes into contact with the connections, carefully check the are nish.
Improper aring
Inclined Surface damaged
Cracked Uneven thickness
3. To are
Bar
Red arrow mark
Handle
Core Yoke
Clamp handle
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10.3 Select the Best Location
10.3.1 Outdoor Unit If an awning is built over the unit to prevent direct
sunlight or rain, be careful that heat radiation from the condenser is not obstructed.
There should not be any animal or plant which could be affected by hot air discharged.
Keep the spaces indicated by arrows from wall, ceiling, fence or other obstacles.
Do not place any obstacles which may cause a short circuit of the discharged air.
Recommended installation height for outdoor unit should be above the seasonal snow level.
Refrigerant piping size
Outdoor Unit CU-2E18**
Liquid - side 1/4" (6.35 mm) thickness 1/32" (t0.8 mm)
Gas - side 3/8" (9.52 mm) thickness 1/32" (t0.8 mm)
Outdoor Unit CU-2E18**
Min. total piping length for additional gas 65.6 ft (20 m)
If total piping length of all indoor units exceeds the minimum length listed above, additionally charge with 0.2 oz (20 g) of refrigerant (R410A) for each additional feet (meter) of piping.
Outdoor Unit Installation Diagram
Installation parts you should purchase ( )
It is advisable to avoid more than 2 blockage directions. For better ventilation & multiple-outdoor installation, please consult authorized dealer/specialist.
3/8" (9.52 mm) Gas side piping ( )
1/4" (6.35 mm) Liquid side piping ( )
Additional drain hose ( )
Connection cable ( ) (Conduit)
Power supply cord ( ) (Conduit)
This illustration is for explanation purposes only. * Note:
Respective indoor unit installation procedure shall refer to instruction manual provided in the indoor unit packaging.
Allowable piping length
Outdoor Unit CU-2E18***
Allowable piping length of each indoor unit (min. ~ max.) 9.8 ft ~ 82.0 ft (3 m ~ 25 m)
Allowable total piping length of all indoor units 164.0 ft (50 m) or less
Height difference between indoor and outdoor units Outdoor unit located on upper side a 49.2 ft (15 m) or less
Outdoor unit located otherwise b 24.6 ft (7.5 m) or less
Height difference between indoor units Outdoor unit located on upper side c 24.6 ft (7.5 m) or less
Outdoor unit located otherwise d 49.2 ft (15 m) or less
Outdoor unit located on upper side
Outdoor unit located otherwise
d
b
d
b
a c
Outdoor unit
Outdoor unit
Outdoor unittinu roodnItinu roodnI
Indoor unit
18
Outdoor Unit Installation Guidelines Where a wall or other obstacle is in the path of outdoor units intake or exhaust airflow, follow the installation
guidelines below. For any of the below installation patterns, the wall height on the exhaust side should be 47 1/4" (1200 mm) or
less.
Wall facing one side
More than 3 15/16" (100)
weiv poTweiv ediS
47 1/4" (1200) or less
More than 39 3/8" (1000)
More than 39 3/8" (1000)
More than 3 15/16" (100)
More than 3 15/16" (100)
More than 3 15/16" (100)
More than 3 15/16" (100)
More than 39 3/8" (1000)
More than 11 13/16" (300)
Walls facing two side Walls facing three side
Top view
Unit : inch (mm)
10.4 Install the Outdoor Unit After selecting the best location, start installation
to Indoor/Outdoor Unit Installation Diagram. 1 Fix the unit on concrete or rigid frame firmly
and horizontally with bolt nut (13/32" (10 mm)).
2 When installing on a roof, please consider strong winds and earthquakes.
3 Please fasten the installation stand firmly with bolt or nails.
A B
C
D
Model A B C D
CU-2E18*** 24 1/8" (613 mm)
5 5/32" (131 mm)
5/8" (16 mm)
14 3/16" (360.5 mm)
10.5 Connect the Piping Remove the control board cover (resin) from the
outdoor unit by loosening three screws. Connecting the Piping to Outdoor Unit
Decide piping length and then cut by using pipe cutter. Remove burrs from cut edge. Make flare after inserting the flare nut (locate at valve) onto the copper pipe. Align center of piping to valves and then tighten with torque wrench to the specified torque as stated in the table.
Do not overtighten, over tightening may cause gas leakage.
Piping size Torque
1/4" (6.35 mm) 13.3 Ibfft [18 Nm (1.8 kgfm)] 3/8" (9.52 mm) 31.0 Ibfft [42 Nm (4.3 kgfm)] 1/2" (12.7 mm) 40.6 Ibfft [55 Nm (5.6 kgfm)]
5/8" (15.88 mm) 47.9 Ibfft [65 Nm (6.6 kgfm)] 3/4" (19.05 mm) 73.8 Ibfft [100 Nm (10.2 kgfm)]
Screws
Control Board Cover (Resin)
Flare Nut
Torque Wrench for Flare Nut
(Connection Pipe)
(Connection Pipe)
Male side Torque Wrench for Flare Nut
Liquid side
Gas side Flare Nut
Screw
Female side
Applicable to Liquid and Gas side of CS-E9*** CS-E12*** CS-ME5*** CS-ME7*** CS-ME9***
Gas Leak Checking Pressure test to system to 400 PSIG with dry nitrogen, in stages. Thoroughly leak check the system. If the pressure holds, release the nitrogen and proceed to section 10.7.
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10.6 Evacuation of the Equipment WHEN INSTALLING AN AIR CONDITIONER, BE SURE TO EVACUATE THE AIR INSIDE THE INDOOR UNIT AND PIPES in the following procedure.
1 Connect a charging hose with a push pin to the Low side of a charging set and the service port of the gas side 3-way valve.
2 Connect the micron gauge between vacuum pump and service port of outdoor units.
3 Turn on the power switch of the vacuum pump and make sure that connect digital micron gauge and to pull down to a value of 500 microns.
4 To make sure micron gauge a value 500 microns and close the low side valve of the charging set and turn off the vacuum pump.
5 Disconnect the vacuum pump house from the service port of the 3-way valve.
6 Tighten the service port caps of gas side 3-way valve at a torque of 13.3 Ibfft (18 Nm) with a torque wrench.
7 Remove the valve caps of both of the 2-way valve and 3-way valve. Position both of the valves to Open using a hexagonal wrench (5/32" (4 mm)).
8 Mount valve caps onto the 2-way valve and 3-way valve. o Be sure to check for gas leakage.
Outdoor unit
Liquid side
Gas side
Vacuum pump
Liquid side 3-way valve
Gas side 3-way valve
Liquid side
Gas side
Tube connector
Tube connector
Tube connector
Tube connector
Close
Close
Indoor Unit
Indoor Unit
If micron gauge value does not descend 500 microns, take the following measures: - If the leak stops when the piping connections are tightened further, continue working from step 3. - If the leak does not stop when the connections are retightened, repair location of leak. - Do not release refrigerant during piping work for installation and reinstallation. - Take care when handling the liquid refrigerant, it may cause frostbite.
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10.7 Connect the Cable to the Outdoor Unit 1 Remove Control Board Cover (Metal) by
loosening 2 screws. 2 Remove Valve Cover (Metal) by loosening
2 screws. 3 Remove Plugs. 4 Fix the conduit connectors to the knock out
holes with lock-nuts, then secure them. 5 Connecting wire between indoor unit and
outdoor unit should be UL listed or CSA approved 4 conductor wires minimum AWG16 in accordance with local electric codes.
6 Wire Connection to the power supply (208/230V 60Hz) through circuit breaker. o Connect the UL listed or CSA approved
wires minimum AWG12 to the terminal board, and connect to other end of the wires to circuit breaker.
7 Connect the power supply cord and connecting wires between indoor unit and outdoor unit according to the diagram as shown.
Connectors
Control Board Cover (Metal)
Plugs
Knock Out Holes
Side Panel
Valve Cover (Metal)
Screws
Lock Nuts
Screws
Top Panel
1 2 3
1 2
L1 L2
3
1 2 3
1 2 3
Outdoor Unit
Terminal
Unit A
Unit B
Terminal
Indoor Unit A
Disconnect Switch Field supply
Grounding wire
Grounding wire min AWG16
Grounding wire min AWG16
Power Supply Single Phase 208/230V 60Hz min AWG12
208/230V min AWG16
208/230V min AWG16
208/230V min AWG16
208/230V min AWG16
208/230V min AWG16
208/230V min AWG16
Terminal
Indoor Unit B
Unit A Unit B
Power Supply Cord
Indoor & outdoor connection wire
Indoor Unit A
Indoor Unit B
8 For wire stripping and connection requirement, refer to the diagram below. 9 Secure the power supply cord and connection cables onto the control board with the holder. 10 Attach the control board cover (metal and resin) and valve cover back to the original position with screw.
Wire stripping
7/32" (5 mm) or more
(gap between wires)
No loose strand when inserted
Indoor/outdoor connecting terminal board
WIRE STRIPPING AND CONNECTING REQUIREMENT
Conductor fully inserted
Conductor over inserted
Conductor not fully inserted
ACCEPT PROHIBITED PROHIBITED
13 /3
2"
1 / 1
6" (1
0 1
m m
)
This equipment must be properly earthed. o Earth wire must be Yellow/Green (Y/G) in colour and longer than other AC wires for safety reasons.
10.8 Heat Insulation
Use a material with good heat-resistant properties as the heat insulation for the pipes. Be sure to insulate both the gas-side and liquid-side pipes. If the pipes are not adequately insulated, condensation or water leakages may occur.
Liquid-side pipes