INSTALLATION INSTRUCTIONS 2WAY VRF System Air Conditioner This air conditioner uses the refrigerant R410A. External diameter of service port R410A: 5/16" NOTE Model No. Outdoor Units Type Outdoor Unit Type U-72ME1U9 U-96ME1U9 2WAY VRF System U-72ME1U9E* U-96ME1U9E* * Salt-Air Damage Resistant Specifications.
IMPORTANT! Please Read Before Starting • T This air conditioning system meets strict safety and oper- When Installing… ating standards. As the installer or service person, it is an Select an installation location which is rigid and strong important part of your job to install or service the system so •...
• Do not touch the air inlet or the When Servicing CAUTION sharp aluminum fins of the • Turn the power OFF at the main power box (mains) outdoor unit. You may get injured. before opening the unit to check or repair electrical •...
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.” For tubes of ø7/8" (ø22.22 mm) or larger, use C1220 T-1/2H material or H material, and do not bend the tubes. ●...
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...
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.
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 LM = LA + LB … 262 ft Main distribution tubes LC – LH are selected according to the capacity after the distribution joint. The outdoor connection main tubing (LO portion) is determined by the total capacity of the outdoor units that are connected to the tube ends.
1-7. Straight Equivalent Length of Joints Design the tubing system by referring to the following table for the straight equivalent length of joints. Unit: ft. Table 1-8 Straight Equivalent Length of Joints 1/2" 5/8" 3/4" 7/8" 1" 1-1/8" 1-3/8" 1-5/8" Gas tubing size (in.
Always check the gas density WARNING limit for the room in which the unit is installed. 1-10. 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.
1-12. Optional Distribution Joint Kits See the installation instructions packaged with the distribution joint kit for the installation procedure. Table 1-12 Model name Cooling capacity after distribution Remarks 1. CZ-P680PJ1U 232,000 BTU/h (68.0 kW) or less For outdoor unit 2. CZ-P1350PJ1U 460,700 BTU/h (135.0 kW) or less For outdoor unit 3.
3. CZ-P160BK1U Use: For indoor unit (Capacity after distribution joint is 76,400 BTU/h (22.4 kW) or less.) Example: Gas tubing Liquid tubing 4-21/64 4-21/64 3-13/16 3-13/16 Distr ib utio n Distr ib utio n Insulation Insulation Joint Joint Unit: in. Table 1-15 Size of connection point on each part (Shown are inside diameters of tubing) Size Part A...
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 addi- tional refrigerant charge using the formula below. Required additional = Necessary Amount of Additional Refrigerant Charge Per Outdoor Unit refrigerant charge (oz)
● Obtain liquid tubing size from Tables 1-3, 4, 5, 7 and 10-1. Main tubing LA = ø5/8 (ft.) (Total capacity of indoor unit is 179,400 BTU/h) The longest tubing length in this example LB = ø1/2 (ft.) (Total capacity of indoor unit is 131,600 BTU/h) (LA = 131 ft.) LC = ø3/8 (ft.) (Total capacity of indoor unit is 83,800 BTU/h) Distribution joint tubing...
2. SELECTING THE INSTALLATION SITE Exhaust fan 2-1. Outdoor Unit Hot air AVOID: Heat source Out- ● heat sources, exhaust fans, etc. door ● damp, humid or uneven locations unit ● indoors (no-ventilation location) Fig. 2-1 ● choose a place as cool as possible. ●...
2-2. Removing Fin Guard for Heat Exchanger After installation of the outdoor unit, detach the fin guard for heat exchangers as following steps. 1. Cut out the fin guard entirely attached to the panel and remove it from the outdoor unit. Pay careful attention not to damage the fin when cutting out the fin guard.
2-6. Dimensions of Wind Ducting Reference diagram for air-discharge chamber (field supply) unit: in. Ceiling panel Ceiling panel Air direction: Front direction Air direction: Right direction 33-3/16 (Ceiling panel dimensions) (Ceiling panel dimensions) (Ceiling panel dimensions) 35-1/4 (Maximum bracket dimensions) Front view Right side view Front view...
2-7. Dimensions of Snow Ducting Reference diagram for snow-proof ducting (field supply) 31-1/2 Air direction: Air direction: Front direction Right direction Ceiling panel Ceiling panel 31-1/2 31-1/2 (Air intake duct) unit: in. 33-3/16 (Air outlet duct) 9-1/2 9-1/2 9-1/2 9-1/2 9-1/2 9-1/2 (Ceiling panel dimensions)
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. (Fig. 3-1) CAUTION ● When hoisting the outdoor unit, pass ropes or straps under the bottom plate as shown in the figure at right.
3-3. Routing the Tubing ● The tubing can be routed out either from the front or from the bottom. (Fig. 3-6) ● The connecting valve is contained inside the unit. Therefore, remove the front panel. (Fig. 3-6) (1) If the tubing is routed out from the front, use cutting pliers or a similar tool to cut out the tubing outlet slit (part indicated ) from the tubing cover.
3-4. Prepare the Tubing ● Material: Use C1220 phosphorous deoxidized copper as described in JIS H3300, “Copper and Copper Alloy Seamless Pipes and Tubes.” (For tubes that are ø7/8" ø22.22 mm) or larger, use 1/2H material or H material. For all others use O material.) ●...
Refrigerant tube port ● Use caulking, putty, or a similar material to fill any gaps at the Bottom plate refrigerant tube port ( ) in order to prevent rainwater, dust or Tubing cover foreign substances from entering the unit. * Perform this work even if the tubing is routed out in a downward direction.
4. ELECTRICAL WIRING 4-1. General Precautions on Wiring (7) Regulations on wire diameters differ from locality to (1) Before wiring, confirm the rated voltage of the unit as locality. For field wiring rules, please refer to your shown on its nameplate, then carry out the wiring LOCAL ELECTRICAL CODES before beginning.
4-3. Wiring System Diagram Indoor unit (No. 1) Outdoor unit Power supply INV unit 208 / 230V, 60Hz, 1-PH 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...
CAUTION (1) When linking outdoor units in a network, disconnect the terminal extended from the short plug (CN003, 2P Black, location: right bottom on the outdoor main control PCB) 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.
Loose wiring may cause the terminal to overheat or result WARNING in unit malfunction. 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 plate.
5. HOW TO PROCESS TUBING Deburring The liquid tubing side is connected by a flare nut, and the After Before gas tubing side is connected by brazing. 5-1. Connecting the Refrigerant Tubing Use of the Flaring Method Many of conventional split system air conditioners employ the flaring method to connect refrigerant tubes which run between indoor and outdoor units.
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. Apply refrigerant (2) Be sure to apply refrigerant lubricant to the matching lubricant surfaces of the flare and union before connecting them together.
Two tubes arranged together 5-3. Insulating the Refrigerant Tubing Tubing Insulation Liquid tubing Gas tubing ● Thermal insulation must be applied to all unit tubing, including the distribution joint (purchased separately). (Fig. 5-7) Insulation * For gas tubing, the insulation material must be heat resistant to 248°F or above.
5-4. Taping the Tubes (1) At this time, the refrigerant tubes (and electrical wiring if local codes permit) should be taped together with armoring tape in 1 bundle. To prevent the condensation from overflowing the drain pan, keep the drain hose separate from the refrigerant tubing.
Manifold gauge 6. AIR PURGING 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 Fig.
(4) Do a leak test of all joints of the tubing (both indoor and Manifold valve outdoor) and both gas and liquid service valves. Bub- bles indicate a leak. Wipe off the soap with a clean cloth after a leak test. Pressure gauge (5) After the system is found to be free of leaks, relieve the...
Manifold valve (2) When the desired vacuum is reached, close the “Lo” knob of the manifold valve and turn off the vacuum pump. Please Pressure gauge confirm that the gauge pressure is under –14.7 psig (–755 mmHg, 5 Torr) after 4 to 5 minutes of vacuum pump Valve operation.
7. TEST RUN 7-1. Preparing for Test Run ● Before attempting to start the air conditioner, check the following. (1) All loose matter is removed from the cabinet especially steel filings, bits of wire, and clips. (Power must be turned ON at least 5 hours before (2) The control wiring is correctly connected and all attempting test run)
Items to Check Before the Test Run 7-2. Test Run Procedure 1. Turn the remote power switch on at least 5 hours before Recheck the items to check before the test run. the test, in order to energize the crankcase heater. 2.
7-3. Main Outdoor Unit PCB Setting CN003 CN101 CN100 S007 S006 S005 S004 S003 S002 Fig. 7-4...
Examples of the No. of indoor units settings (S005, S004) Indoor unit setting (S005) Indoor unit setting (S004) No. of indoor units (3P DIP switch, blue) (Rotary switch, red) 10 20 30 1 unit (factory setting) All OFF Set to 1 11 units 1 ON Set to 1...
7-4. Auto Address Setting 1. Auto Address Setting Basic wiring diagram: Example (1) • If link wiring is not used (The inter-unit control wires are not connected to multiple refrigerant systems.) Indoor unit addresses can be set without operating the compressors. No.
Basic wiring diagram: Example (2) Basic wiring diagram: Example (2) • If link wiring is used * When multiple outdoor main units exist, remove the socket that is used to short-circuit the terminal plug (CN003) from all outdoor No. 1 (main outdoor unit) settings main unit PCBs except for one unit.
Case 2 Automatic Address Setting (no compressor operation) Indoor and outdoor unit power can be turned ON for each system separately. Indoor unit addresses can be set without operating the compressors. Automatic Address Setting from Outdoor Unit On the No. 1 (main) unit control PCB, set the unit No. switch (S007) to (unit No.
Case 3A Automatic Address Setting in Heating Mode ● Indoor and outdoor unit power cannot be turned ON for each system separately. In the following, automatic setting of indoor unit addresses is not possible if the compressors are not operating. Therefore perform this process only after completing all refrigerant tubing work.
Case 3B Automatic Address Setting in Cooling Mode ● Indoor and outdoor unit power cannot be turned ON for each system separately. In the following, automatic setting of indoor unit addresses is not possible if the compressors are not operating. Therefore perform this process only after completing all refrigerant tubing work.
Display during automatic address setting ● On outdoor main unit PCB * Do not short-circuit the automatic address setting pin (CN100) again while automatic address set- ting is in progress. Doing so will cancel the setting operation and will cause LEDs 1 and 2 to turn OFF.
Request concerning recording the indoor/outdoor unit combination Nos. After automatic address setting has been completed, be sure to record them for future reference. List the outdoor main unit system address and the addresses of the indoor units in that system in an easily visible location (next to the nameplate), using a permanent marking pen or similar means that cannot be abraded easily.
7-6. 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 the Service Manual) ●...
7-7. Meaning of Alarm Messages Table of Self-Diagnostics Functions and Description of Alarm Displays Alarm messages are indicated by the blinking of LED 1 and 2 (D72, D75) on the outdoor unit PCB. They are also displayed on the wired remote controller. ●...
Alarm Possible cause of malfunction message Protective device in indoor unit Activation of Thermal protector in indoor unit fan motor is activated. <<P01>> is activated. protective Improper wiring connections of ceiling panel. <<P09>> device Float switch is activated. <<P10>> Operation of protective function of fan inverter. sensor (detects low oxygen level) activated Incorrect discharge temperature.
Alarm messages displayed on system controller Serial Error in transmitting serial Indoor or main outdoor unit is not operating correctly. communication communication signal Mis-wiring of control wiring between indoor unit, main outdoor unit errors and system controller. Mis-setting Indoor or main outdoor unit is not operating correctly. Error in receiving serial Mis-wiring of control wiring between indoor unit, main outdoor unit communication signal...