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INSTALLATION INSTRUCTIONS
Air Conditioner
This air conditioner uses the refrigerant R410A.
External diameter of service port R410A: 5/16" (7.94mm)
NOTE
Model No.
Outdoor Units
Type Outdoor Unit Type
ME2
2WAY VRF System
• To be connecting Indoor Unit
Indoor Units
Type Indoor Unit Type
4-Way Cassette
U2
36" × 36"
4-Way Cassette
Y2
24" × 24"
D1
1-Way Cassette
Concealed Duct
F2
- Medium Static
Concealed Duct
M2
- Low Static
Concealed Duct
E1
- High Static
T2
Ceiling
K2
Wall Mounted
P1
Floor Standing
Concealed Floor
R1
Standing
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.
CV6231977845
85464369760022
00_302411_EN.indd 1
Nominal Capacity
72
96
U-72ME2U9
U-96ME2U9
U-72ME2U94
U-96ME2U94
7
9
12
S-07MU2U6 S-09MU2U6 S-12MU2U6
S-07MY2U6 S-09MY2U6 S-12MY2U6
S-07MD1U6 S-09MD1U6 S-12MD1U6
S-07MF2U6 S-09MF2U6 S-12MF2U6 S-15MF2U6 S-18MF2U6 S-24MF2U6 S-36MF2U6 S-48MF2U6 S-54MF2U6
S-07MM2U6 S-09MM2U6 S-12MM2U6 S-15MM2U6 S-18MM2U6
S-12MT2U6
S-07MK2U6 S-09MK2U6 S-12MK2U6
S-07MP1U6 S-09MP1U6 S-12MP1U6 S-15MP1U6 S-18MP1U6 S-24MP1U6
S-07MR1U6 S-09MR1U6 S-12MR1U6 S-15MR1U6 S-18MR1U6 S-24MR1U6
120
144
U-120ME2U9
U-144ME2U9
U-120ME2U94
U-144ME2U94
Nominal Capacity
15
18
24
S-24MU2U6 S-36MU2U6
S-18MY2U6
S-36ME1U6 S-48ME1U6
S-18MT2U6 S-24MT2U6
S-18MK2U6 S-24MK2U6
36
48
54
ACXF60-18511
2018/7/4 13:27:15
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Related Manuals for Panasonic U-72ME2U94
Summary of Contents for Panasonic U-72ME2U94
- Page 1 Model No. Outdoor Units Type Outdoor Unit Type Nominal Capacity 2WAY VRF System U-72ME2U9 U-96ME2U9 U-120ME2U9 U-144ME2U9 U-72ME2U94 U-96ME2U94 U-120ME2U94 U-144ME2U94 • To be connecting Indoor Unit Indoor Units Nominal Capacity Type Indoor Unit Type 4-Way Cassette S-07MU2U6 S-09MU2U6 S-12MU2U6 S-24MU2U6 S-36MU2U6 36"...
- Page 2 IMPORTANT! When Transporting Please Read Before Starting Be careful when picking up and moving the indoor and outdoor units. Get a partner to help, and bend your knees This air conditioning system meets strict safety and when lifting to reduce strain on your back. Sharp edges or operating standards.
- Page 3 • Do not leak refrigerant while piping work for an CAUTION WARNING installation or re-installation, and while repairing refrigeration parts. • Do not touch the air inlet or the sharp Handle liquid refrigerant carefully as it may cause aluminum fins of the outdoor unit. You frostbite.
- Page 4 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.
- Page 5 3-2. Use R410A exclusive cylinder only. Valve Single-outlet valve (with siphon tube) Liquid refrigerant should be recharged with the cylinder standing on end as shown. Liquid 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...
- Page 6 CONTENTS Page Page IMPORTANT! ......2 5. HOW TO PROCESS TUBING ... . . 34 Please Read Before Starting 5-1.
- Page 7 4. Refrigeration tubing lubricant 5. Clamps or saddles to secure refrigerant tubing 6. Scale for weighing Table 1 Outdoor Unit Q’ty U-72ME2U9 U-96ME2U9 U-120ME2U9 U-144ME2U9 Part name Figure U-72ME2U94 U-96ME2U94 U-120ME2U94 U-144ME2U94 (6 ton) (8 ton) (10 ton) (12 ton) Outer Inner Connection...
- Page 8 1-5. Tubing Length Select the installation location so that the length and size of refrigerant tubing are within the allowable range show in the figure below. Main tubing length (maximum tubing size) LM = LA + LB … Main distribution tubes LC – LH are selected according to the capacity after the distribution joint. 3.
- Page 9 1-6. Tubing Size Table 1-3 Main Tubing Size (LA) Between No.1 distribution joint for outdoor unit and No.1 distribution joint (for indoor unit) Unit: in. (mm) BTU/h 72,000 96,000 120,000 144,000 168,000 192,000 216,000 240,000 264,000 288,000 312,000 336,000 360,000 (kW) (21.1) (28.1)
- Page 10 1-7. Straight Equivalent Length of Joints Design the tubing system by referring to the following table for the straight equivalent length of joints. Table 1-8 Straight Equivalent Length of Joints Unit: ft. (m) 1/2" 5/8" 3/4" 7/8" 1-1/8" 1-3/8" 1-5/8" Gas tubing size (in.
- Page 11 1-9. System Limitations Table 1-11 System Limitations Maximum number of connectable indoor units when connected with minimum capacity Max. No. allowable connected outdoor units Total system Number of Total system Number of Max. capacity allowable connected outdoor 360,000 BTU/h tonnage indoor units tonnage indoor units...
- Page 12 1-11. Installing Distribution Joint Pay special attention to any location, such as a basement, etc., where leaking refrigerant can CAUTION CAUTION accumulate, since refrigerant gas is heavier than air. (1) Refer to “HOW TO ATTACH DISTRIBUTION JOINT” enclosed with the optional distribution joint kit (CZ-P680PJ1U, CZ-P1350PJ1U, CZ-P160BK1U, CZ-P680BK1U, CZ-P1350BK1U).
- Page 13 1-12. Optional Distribution Joint Kits See the installation instructions packaged with the distribution joint kit for the installation procedure. Table 1-12 * In case the total capacity of indoor Model name Cooling capacity after distribution Remarks units connected after distribution 1.
- Page 14 3. CZ-P160BK1U Use: For indoor unit (Capacity after distribution joint is 76,400 BTU/h (22.4 kW) or less.)* 4-21/64 4-21/64 Example: Gas tubing Liquid tubing (110) (110) 3-13/16 3-13/16 (97) (97) Distribution Distribution Insulation Insulation Joint Joint Unit: in. (mm) Table 1-15 Size of connection point on each part (Shown are inside diameters of tubing) Size Part A Part B...
- Page 15 1-13. Example of Tubing Size Selection and Refrigerant Charge Amount Additional refrigerant charging Based on the values in Tables 1-3, 4, 5, 7, 10-1 and 10-2, use the liquid tubing size and length, and calculate the amount of additional refrigerant charge using the formula below. Unit of account (oz) Necessary Amount of Additional Refrigerant Charge Per Outdoor Unit Required additional...
- Page 16 Example: ● Example of all outdoor units ● Example of each tubing length cooling capacity Outdoor unit Main tubing Distribution joint tubing Type 72: 72,000 BTU/h (21.1 kW) LA = 131 ft. (40m) Outdoor side Indoor side Type 96: 96,000 BTU/h (28.1 kW) Type 96 Type 72...
- Page 17 2. SELECTING THE INSTALLATION SITE ● Leave space open above the CAUTION CAUTION unit. 2-1. Outdoor Unit ● Construct louvers or other openings in the wall, if AVOID: necessary, to ensure adequate ● heat sources, exhaust fans, etc. ventilation. ● damp, humid or uneven locations NOTE ●...
- Page 18 2-2. Shield for Horizontal Exhaust Discharge 2-3. Installing the Outdoor Unit in Heavy Snow Areas It is necessary to install an air-discharge chamber (field supply) to direct exhaust from the fan horizontally if it is difficult In locations where wind-blown snow can be a problem, to provide a minimum space of 7 ft.
- Page 19 2-5. Dimensions of Wind Ducting Reference diagram for air-discharge chamber (field supply) For type 72/96 Note: Can be installed so that the air direction is to the front or rear direction. unit: in. (mm) Air direction: Front direction Air direction: Rear direction Top view Top view 30-35/64...
- Page 20 Reference diagram for air-discharge chamber (field supply) (continued) Combination of units For various types of combination, refer to Technical Data. unit: in. (mm) Top view (Before installing air-discharge chamber) Top view 39-31/64 (1003) 3/64 (1) 5/64 (2) Front view Right side view According to the installation site, you may choose the setting position in the depth direction of the anchor bolt from “A”, “B”...
- Page 21 2-6. Dimensions of Snow Ducting Reference diagram for snow-proof ducting (field supply) For type 72/96 Note: Can be installed so that the air direction is to the front or rear direction. unit: in. (mm) 26-7/64 26-7/64 (663) (663) Air direction: Front direction Air direction: Rear direction Top view Top view...
- Page 22 Reference diagram for snow-proof ducting (field supply) (continued) Combination of units For various types of combination, refer to Technical Data. unit: in. (mm) 8-17/64 (210) 8-17/64 (210) 7-3/32 (180) 7-3/32 (180) Top view (Before installing snow-proof ducting) Top view 39-31/64 (1003) 3/64 (1) 5/64 (2)
- Page 23 3. HOW TO INSTALL THE OUTDOOR UNIT 3-1. Transporting When transporting the unit, have it delivered as close to the installation site as possible without unpacking. Use a hook for suspending the unit. CAUTION CAUTION ● When hoisting the outdoor unit, pass ropes or straps under the bottom plate as shown in the figure at right.
- Page 24 Type 72/96 Type 120/144 Unit: in. (mm) Air intake Air intake 19/32 (15) 29-9/64 (740) 19/32 (15) 45-9/32 (1150) (Installation hole pitch) (Installation hole pitch) 30-5/16 (770) 46-29/64 (1180) A : 37-61/64 (964) [Installation hole pitch] * The tubing is routed out from the front. B : 28-47/64 (730) [Installation hole pitch] * The tubing is routed out from the bottom.
- Page 25 3-4. Prepare the 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 Use the tubing size indicated in the table below. ●...
- Page 26 Refrigerant tube port Tubing cover ● Use caulking, putty, or a similar material to fill any gaps at the refrigerant tube port ( ) in order to prevent rainwater, dust or foreign substances from entering the unit. * Perform this work even if the tubing is routed out in a downward Tubing routed out direction.
- Page 27 ● Precautions for brazing Be sure to replace the air inside the tube with nitrogen to prevent oxide film from forming during the brazing process. Be sure to use a damp cloth or other means to cool the valve unit during brazing. Work method Pressure-reducing valve (regulator)
- Page 28 U-96ME2U9 60 A D1, U2, Y2, F2, M2, T2, P1, R1 15 A U-120ME2U9 60 A 15 A U-144ME2U9 60 A U-72ME2U94 25 A U-96ME2U94 25 A U-120ME2U94 25 A U-144ME2U94 30 A Control wiring (A) Inter-unit (between outdoor and...
- Page 29 INV unit Power supply Ground 208 / 230V, 60Hz, 3-PH Remote Controller Ground Group control: U-72ME2U94 / U-96ME2U94 / U-120ME2U94 / U-144ME2U94 Indoor unit (No. 3) Outdoor unit INV unit Power supply 208 / 230V, 60Hz, 1-PH Power supply 460V, 60Hz, 3-PH...
- Page 30 CAUTION CAUTION (1) When linking outdoor units in a network, disconnect the terminal extended from the short plug (CN67) from all outdoor units except any one of the outdoor units. (When shipping: In shorted condition.) For a system without link (no connection wiring between outdoor units), do not remove the short plug. (2) Do not install the inter-unit control wiring in a way that forms a loop.
- Page 31 Loose wiring may cause the terminal to overheat or result in unit malfunction. CAUTION WARNING A fire hazard may also exist. Therefore, ensure that all wiring is tightly connected. When connecting each power wire to the terminal, follow the instructions on “How to connect wiring to the terminal” and fasten the wire securely with the fixing screw of the terminal board.
- Page 32 U-72ME2U94 / U-96ME2U94 / U-120ME2U94 / (CR-72ME2U94/ACXA73-03280) U-144ME2U94 In this case, replace the pins 1 and 2 of the 2P connector (BRN, EMG, CN69) with the pins 2 and 3. Cut out the jumper (JP11). Jumper JP11 EMG, CN69 2P connector,...
- Page 33 U-72ME2U94 / U-96ME2U94 / U-120ME2U94 / U-144ME2U94 Type 72/96 Type 120/144 Electronic component box Inter-unit control wiring (U1, U2) P.C. board P.C. board 4P terminal board * Inter-outdoor unit control wiring (1, 2) 4P terminal board * Terminal board for power supply...
- Page 34 5. HOW TO PROCESS TUBING (3) Remove the flare nut from the unit and be sure to mount it on the copper tube. The liquid tubing side is connected by a flare nut, and the gas (4) Make a flare at the end of copper tube with a flare tool. tubing side is connected by brazing.
- Page 35 Caution Before Connecting Tubes Tightly (1) Apply a sealing cap or water-proof tape to prevent dust or water from entering the tubes before they are used. (2) Be sure to apply refrigerant lubricant to the matching surfaces of the flare and union before connecting them together.
- Page 36 5-3. Insulating the Refrigerant Tubing 5-4. Taping the Tubes (1) At this time, the refrigerant tubes (and electrical wiring Tubing Insulation if local codes permit) should be taped together with armoring tape in 1 bundle. ● Thermal insulation must be applied to all unit tubing, including To prevent the condensation from overflowing the drain the distribution joint (purchased separately).
- Page 37 6. AIR PURGING Manifold gauge Air and moisture in the refrigerant system may have undesirable effects as indicated below. ● pressure in the system rises ● operating current rises ● cooling (or heating) efficiency drops ● moisture in the refrigerant circuit may freeze and block capillary tubing ●...
- Page 38 (4) Do a leak test of all joints of the tubing (both indoor and outdoor) and Manifold valve all service valves. Vacuum Bubbles indicate a leak. gauge Wipe off the soap with a clean cloth after a leak test. (5) After the system is found to be free of leaks, relieve the nitrogen pressure by loosening the charge hose connector at the nitrogen cylinder.
- Page 39 Manifold valve Charging additional refrigerant Pressure gauge Use a cylinder designed for use with CAUTION CAUTION R410A respectively. Valve ● Charging additional refrigerant (calculated from the liquid tube length as shown in Section “1-8. Additional Refrigerant Charge”) using the liquid tube service valve. ●...
- Page 40 7. TEST RUN (7) Request that the customer be present for the trial run. Explain the contents of the instruction manual, then have 7-1. Preparing for Test Run the customer actually operate the system. ● Before attempting to start the air conditioner, check the (8) Be sure to give the instruction manual and warranty following.
- Page 41 7-2. Test Run Procedure Notes: Recheck before the test run. 1. Use caution when making the settings. If there are duplicated system addresses, or if the settings for the number of indoor units are not Have outdoor sub units been connected? consistent, an alarm will occur and the system will not start.
- Page 42 7-3. Main Outdoor Unit PCB Setting U-72ME2U9 / U-96ME2U9 CN23 CN34 CN33 Terminating resistance pin CN73 CN24 CN27 CN28 CN30 CN40 COOL HEAT MODE NO. OF I / U R. C. ADD O/U. ADD NO. OF O/U SHORT OPEN CN67 U-120ME2U9 / U-144ME2U9 CN28 CN24...
- Page 43 U-72ME2U94 / U-96ME2U94 / U-120ME2U94 / U-144ME2U94 Terminating resistance pin CN73 CN34 CN33 CN24 CN23 CN40 CN30 CN28 CN27 00_302411_EN.indd 43 2018/7/4 13:27:56...
- Page 44 ● <Sample> Outdoor unit number setting (SW5) Unit number setting (SW5) Unit number setting Notes: (3P Dip switch, blue) (1) Unit 1 (outdoor main unit) needs to prepare the settings Unit 1 (at shipment) 1: ON of “number of outdoor units”, “number of indoor units” and “system address”.
- Page 45 7-4. Function Switches on P.C. Board Function Switch Remarks Changes to cooling/heating mode. (outdoor main unit is only usable.) When in normal operation: When short circuited the COOL side, indoor unit operation in the same MODE pin (3P, BLK) refrigerant system changes to all cooling mode. (CN40) When short circuited the HEAT side, indoor unit operation in the same refrigerant system changes to all heating mode.
- Page 46 7-5. Auto Address Setting Example: Basic Wiring Diagram (1) • Case of no link wiring 3P terminating (Inter-unit control wiring is not connected to a multiple system.) resistance pin Indoor unit address setting is possible without starting the compressor. (SHORT side) Unit 1 setting (outdoor main unit) * It is not necessary to control the terminating No.
- Page 47 Example: Basic Wiring Diagram (2) Setting of terminal pin (CN67) Refrigerant circuit No. 1 • Case of link wiring Unit No. 1 (Main) : short-circuit (at shipment) * See the section “ATTENTION!”. Unit No. 2 (Sub) : short-circuit (at shipment) No.
- Page 48 ● F Between conductors inal check before operation Wire Final check must be done under the conditions of inter-outdoor unit control wiring connected to the centralized control system and the resistor between conductors must be measured by a Megger. Check if it is showing between 30Ω and 120Ω. Wire If the resistance value is out of range, check adjustment of the termination resistor again.
- Page 49 Case 3.a (Auto address setting in heating mode) ● In case of impossibility of turning ON power to indoor/outdoor units in each refrigerant system: Indoor unit auto address setting cannot be made unless the compressor is started. How to control automatic address from outdoor unit 1.
- Page 50 Case 3.b (Automatic address setting in cooling mode) ● In case of impossibility of turning ON power to indoor/outdoor units in each refrigerant system: The indoor unit auto address setting cannot be made unless the compressor is started. How to control automatic address from outdoor unit 1.
- Page 51 Auto Address Setting from the High-spec Wired Remote Controller (CZ-RTC5A) 1 Keep pressing the buttons simultaneously for 4 or more seconds. The “Maintenance func” screen appears on the LCD display. 20:30 (THU) 2 Press the button to see each menu. If you wish to see the next screen instantly, press the button.
- Page 52 Display During Auto Address Setting ● On the surface of outdoor unit control P.C. board * Do not short circuit the A.ADD pin (CN30) again during auto address setting. LEDs 1 and 2 go out and address setting is interrupted. * When auto address setting is normally completed, both LEDs 1 and 2 go out.
- Page 53 Checking the indoor unit addresses Use the remote controller to check the indoor unit address. CZ-RTC5A (High-spec wired remote controller) 3 The “Simple settings” screen appears on the LCD 1 Keep pressing the buttons display. simultaneously for 4 or more seconds. The “Maintenance func”...
- Page 54 7-6. Setting Test Run Remote Controller CZ-RTC5A (High-spec wired remote controller) 20:30 (THU) 1 Keep pressing the buttons simultaneously for 4 or more seconds. The “Maintenance func” screen appears on the LCD display. START Maintenance func 20:30 (THU) 1. Outdoor unit error data 2.
- Page 55 7-7. Caution for Pump Down Pump down means refrigerant gas in the system is returned to the outdoor unit. Pump down is used when the unit is to be moved, or before servicing the refrigerant circuit. Refer to Service Manual. ●...
- Page 56 • If the alarm display “E15”, “E16” and “E20” appear after auto address setting began, check the following items. Alarm display Alarm contents Recognized number of indoor units at the time of auto address setting are fewer than that of indoor units set by SW3 and SW4 on outdoor main unit P.C.
- Page 57 Remote control display Alarm contents Two or more remote controllers are set as main on R1-R2 link. Auto Address failed to start. Two or more indoor units are set as main, in the group controlled indoor units. Fewer indoor units are found in Auto Addressing than the setting on outdoor PCB. More indoor units are found in Auto Addressing than the setting on outdoor PCB.
- Page 58 Remote control display Alarm contents Protection device activated. High pressure switch (63PH, 63PH1 or 63PH2) or compressor thermal protector (49C1 / 49C2). Missing phase in power input is detected at HIC for 1st compressor. Connection to the panel of indoor unit is not good. Float switch of drain pan safety is activated.
- Page 59 Wired remote Detected contents control display Indoor thermistor is either open or damaged. <<F01>> E1 thermistor on liquid side of indoor heat exchanger has failure. (E1) <<F02>> Indoor unit set as single split. (E2) E3 thermistor on gas side of indoor heat exchanger has failure. (E3) <<F03>>...
- Page 60 Wired remote Detected contents control display Abnormal device function HIC for 2nd compressor has failure. Overcurrent or overheat of HIC. HIC for 1st compressor has failure. Overcurrent or overheat of HIC. • The parentheses of << >> used in the table of alarm display does not affect anything the operation of other indoor units. •...
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- Page 64 ACXF60-18511 Printed in China 85464369760022 DC0314-30718 00_302411_EN.indd 64 2018/7/4 13:28:04...