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Panasonic U-72MF2U9 Installation Instructions Manual

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See also: Service Manual , Technical Data Manual

INSTALLATION INSTRUCTIONS

Air Conditioner

This air conditioner uses the refrigerant R410A.
NOTE
External diameter of service port R410A: 5/16" (7.94mm)
Model No.
Outdoor Units
Type Outdoor Unit Type
MF2
3WAY VRF System
• To be connecting Indoor Unit
Type
Indoor Unit Type
D1
1-Way Cassette
U2
4-Way Cassette 36" × 36"
Y2
4-Way Cassette 24" × 24"
K2
Wall Mounted
T2
Ceiling
F2
Concealed Duct - Medium Static
M2
Concealed Duct - Low Static
E1
Concealed Duct - High Static
P1
Floor Standing
R1
Concealed Floor Standing
Type
Indoor Unit Type
D1
1-Way Cassette
U2
4-Way Cassette 36" × 36"
Y2
4-Way Cassette 24" × 24"
K2
Wall Mounted
T2
Ceiling
F2
Concealed Duct - Medium Static
M2
Concealed Duct - Low Static
E1
Concealed Duct - High Static
P1
Floor Standing
R1
Concealed Floor 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.
85464369843022
Nominal Capacity
72
96
U-72MF2U9
U-96MF2U9
7
S-07MD1U6
S-07MK2U6
S-07MF2U6
S-07MM2U6
S-07MP1U6
S-07MR1U6
24
S-24MU2U6
S-24MK2U6
S-24MT2U6
S-24MF2U6
S-24MP1U6
S-24MR1U6
120
U-120MF2U9
Nominal Capacity
9
12
S-09MD1U6
S-12MD1U6
S-12MY2U6
S-09MK2U6
S-12MK2U6
S-12MT2U6
S-09MF2U6
S-12MF2U6
S-09MM2U6
S-12MM2U6
S-09MP1U6
S-12MP1U6
S-09MR1U6
S-12MR1U6
Nominal Capacity
36
48
S-36MU2U6
S-36MF2U6
S-48MF2U6
S-36ME1U6
S-48ME1U6
144
U-144MF2U9
15
18
S-18MY2U6
S-18MK2U6
S-18MT2U6
S-15MF2U6
S-18MF2U6
S-15MM2U6
S-18MM2U6
S-15MP1U6
S-18MP1U6
S-15MR1U6
S-18MR1U6
54
S-54MF2U6
CV6233323510

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Summary of Contents for Panasonic U-72MF2U9

  • Page 1: Installation Instructions

    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 3WAY VRF System U-72MF2U9 U-96MF2U9 U-120MF2U9 U-144MF2U9 • To be connecting Indoor Unit Nominal Capacity Type Indoor Unit Type...

  • Page 2: Important

    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: Check Of Density Limit

    • Do not leak refrigerant while piping work for an installation or re-installation, and while repairing CAUTION refrigeration parts. Handle liquid refrigerant carefully as it may cause • Do not touch the air inlet or the sharp frostbite. aluminum fins of the outdoor unit. You When Servicing may get injured.

  • Page 4: Precautions For Installation Using New Refrigerant

    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. ●...

  • Page 5: New Refrigerant R410A Cannot Be Used For Earlier Models

    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: Table Of Contents

    CONTENTS Page Page 4. ELECTRICAL WIRING ....29 IMPORTANT! ......2 Please Read Before Starting 4-1.

  • Page 7: General

    (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 Q’ty Part name Figure U-72MF2U9 U-96MF2U9 U-120MF2U9 U-144MF2U9 (6 ton) (8 ton) (10 ton) (12 ton) Outer...

  • Page 8: 1-5. Tubing Length

    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. 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

    *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.

  • Page 10: 1-7. Straight Equivalent Length Of Joints

    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.

  • Page 11: 1-9. System Limitations

    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 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.

  • Page 12: 1-10. Installation Standards

    1-10. Installation Standards Relationship between A/C units and refrigerant tubing 4-tube layout 3-tube layout 2-tube layout Solenoid Outdoor unit Outdoor unit Outdoor unit valve kit Suction tube Suction tube Gas tube Discharge tube Discharge tube Liquid tube Liquid tube Liquid tube Balance tube ● Install the solenoid valve kit 164 ft.

  • Page 13: 1-12. Installing Distribution Joint

    1-12. Installing Distribution Joint Pay special attention to any location, such as a basement, etc., where leaking refrigerant can 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-P900PH1U, CZ-P224BH1U, CZ-P680BH1U, CZ-P1350BH1U).

  • Page 14: 1-13. Optional Distribution Joint Kits

    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 * In case the total capacity of indoor units 2.

  • Page 15: 1-14. Optional Solenoid Valve Kit

    Table 17 Dimensions for connections of each part Unit: in. (mm) Position ø1-1/2" ø1-1/4" ø1-1/8" ø1" ø7/8" ø3/4" ø5/8" ø1/2" ø3/8" – Dimension (ø38.1) (ø31.75) (ø28.58) (ø25.4) (ø22.22) (ø19.05) (ø15.88) (ø12.7) (ø9.52) – . CZ-P224BH1U Use: For indoor unit (Capacity after distribution joint is 76,400 BTU/h (22.4kW) or less.)* Example: (F below indicates inner diameter.

  • Page 16: 1-15. Example Of Tubing Size Selection And

    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) Necessary Amount of Additional Refrigerant Charge Per Outdoor Unit Required additional...

  • Page 17: Refrigerant Charge Amount

    Example: ● Example of each tubing length Main tubing Distribution joint tubing Outdoor unit LA = 131 ft. (40m) Outdoor side Indoor side LB = 16 ft. (4.9m) A = 7 ft. (2.1m) 1 = 98 ft. (30m) 1-1 = 82 ft. (25m) Type 96 Type 72 LC = 16 ft.

  • Page 18: Selecting The Installation Site

    2. SELECTING THE INSTALLATION SITE ● Leave space open above the 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 ● indoors (no-ventilation location) ● D o not do any wiring or tubing within 1 ft.

  • Page 19: 2-2. Shield For Horizontal Exhaust Discharge

    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 20: 2-5. Dimensions Of Wind Ducting

    2-5. Dimensions of Wind Ducting Reference diagram for air-discharge chamber (field supply) Note: Can be installed so that the air direction is to the front or rear direction. unit: in. (mm) Air direction: Front direction Top view 46-11/16 (1186) 45-19/32 39-31/64 (1158) (1003)
  • Page 21 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 22: 2-6. Dimensions Of Snow Ducting

    2-6. Dimensions of Snow Ducting Reference diagram for snow-proof ducting (field supply) Note: Can be installed so that the air direction is to the front or rear direction. unit: in. (mm) Air direction: Front direction 42-1/4 (1073) Top view 46-11/16 (1186) 45-19/32 39-31/64...
  • Page 23 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 24: How To Install The Outdoor Unit

    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 ● When hoisting the outdoor unit, pass ropes or straps under the bottom plate as shown in the figure at right.

  • Page 25: 3-3. Routing The Tubing

    Unit: in. (mm) Air intake 19/32 (15) 45-9/32 (1150) (Installation hole pitch) 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. C : 28-47/64 (730) [Installation hole pitch] 3-3.

  • Page 26: 3-4. Prepare The Tubing

    3-4. Prepare the Tubing ● Material: Use C1220 phosphorous deoxidized copper as described in JIS H3300, “Copper and copper alloy seamless pipes and tubes”. ● Tubing size: Use the tubing size indicated in the table below. ● When cutting the tubing, use a tube cutter, and be sure to remove any burrs. (The same applies to distribution tubing (optional).) ●...
  • Page 27 Tubing cover Refrigerant tube port ● 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 direction. ●...
  • Page 28 ● 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 29: Electrical Wiring

    4-2. Recommended Wire Length and Wire Diameter for Power Supply System Outdoor unit Indoor unit Time delay fuse or Time delay fuse or Type Type circuit capacity circuit capacity U-72MF2U9 45 A 15 A U-96MF2U9 60 A D1, U2, Y2, F2, M2, T2, P1, R1 15 A U-120MF2U9 60 A...

  • Page 30: 4-2. Recommended Wire Length And Wire

    4-3. Wiring System Diagram Indoor unit (No. 1) Power supply Outdoor unit 208 / 230V, 60Hz, 1-PH INV unit Power supply Ground 208 / 230V, 60Hz, 3-PH Remote Controller Ground Indoor unit (No. 2) Inter-outdoor unit control wiring Power supply 208 / 230V, 60Hz, 1-PH Outdoor unit Ground...
  • Page 31 CAUTION (1) When linking outdoor units in a network, see the section “ATTENTION!”. (2) Do not install the inter-unit control wiring in a way that forms a loop. Outdoor unit Outdoor unit Outdoor unit Prohibited Prohibited Indoor unit Indoor unit Indoor unit Indoor unit Indoor unit...
  • Page 32 Loose wiring may cause the terminal to overheat or result in unit malfunction. 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 33 n Wiring sample Electronic component box Inter-unit control wiring (U1, U2) 2P terminal board * Inter-outdoor unit control wiring (1, 2) 2P terminal board * Terminal board for power supply 3P terminal board * Earth terminal * Tightening torque lbs.inch N ·...

  • Page 34: How To Process Tubing

    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: 5-2. Connecting Tubing Between Indoor And

    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: Outdoor Units

    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: Air Purging

    6. AIR PURGING Manifold gau ge Vacuum pump Air and moisture in the refrigerant system may have Outlet undesirable effects as indicated below. Inlet pressure in the system rises ● operating current rises ● cooling (or heating) efficiency drops ● moisture in the refrigerant circuit may freeze and ●...
  • Page 38 (3) Do a leak test of all joints of the tubing (both indoor and outdoor) and all service valves. Bubbles indicate Manifold valve a leak. Wipe off the soap with a clean cloth after a leak test. Vacuum (4) After the system is found to be free of leaks, relieve gauge the nitrogen pressure by loosening the charge hose connector at the nitrogen cylinder.
  • Page 39 (2) When the desired vacuum is reached, close the “Lo” knob of the manifold valve and turn off the vacuum Manifold valve pump. Please confirm that the gauge pressure is WARNING under –14.7 psig (–0.1 MPa) {–755 mmHg, 5 Torr} Pressure after 4 to 5 minutes of vacuum pump operation.

  • Page 40: Test Run

    7. TEST RUN (4) If only 1 outdoor unit is installed, close the service valve on the balance tubes, and open the service 7-1. Preparing for Test Run valve on the other 3 tubes (suction, discharge, and liquid tubes). Before attempting to start the air conditioner, ●...

  • Page 41: Test Run Procedure

    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 Type 72/96 Terminating resistance pin CN30 CN40 COOL HEAT MODE NO. OF I / U R. C. ADD O/U. ADD NO. OF O/U SHORT OPEN CN67 Type 120/144 CN40 CN30 Terminating resistance pin MODE A.
  • Page 43 ● <Sample> Outdoor unit number setting (SW5) Unit number setting (SW5) Unit number setting Notes: (3P Dip switch, Black) (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 44 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 45: Auto Address Setting

    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 46 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 47 Between conductors ● F 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 48 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 Auto Address from Outdoor Unit 1.
  • Page 49 Case 3.b Auto 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 Auto Address from Outdoor Unit 1.
  • Page 50 Auto Address Setting from the High-spec Wired Remote Controller (CZ-RTC3 / CZ-RTC5) 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 51 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 52 Checking the indoor unit addresses Use the remote controller to check the indoor unit address. CZ-RTC3 / CZ-RTC5 (High-spec wired remote controller) 1 Keep pressing the buttons 3 The “Simple settings” screen appears on the LCD simultaneously for 4 or more seconds. display.
  • Page 53 7-6. Setting Test Run Remote Controller CZ-RTC3 / CZ-RTC5 (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.
  • Page 54 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 55 • 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 56 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 57 Remote control display Alarm contents Protection device activated. High pressure switch (63PH, 63PH1 or 63PH2) or compressor thermal protector (49C1 / 49C2). Open 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 58 Wired remote Detected contents control display Indoor thermistor is either open or damaged. E1 thermistor on liquid side of indoor heat exchanger has failure. (E1) <<F01>> <<F02>> Indoor unit set as single split. (E2) E3 thermistor on gas side of indoor heat exchanger has failure. (E3) <<F03>>...
  • Page 59 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. •...
  • Page 60 85464369843022 Printed in China DC0915-21215...

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