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5.  HOW TO PROCESS TUBING

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 that run between indoor and outdoor units. In this method, the copper tubes 
are flared at each end and connected with flare nuts.

Flaring Procedure with a Flare Tool

(1)  Cut the copper tube to the required length with a tube cutter. 

It is recommended to cut approx. 30 – 50 cm longer than the 
tubing length you estimate.

(2)  Remove burrs at each end of the copper tubing with a tube 

reamer or a similar tool. This process is important and should 
be done carefully to make a good flare. Be sure to keep any 
contaminants (moisture, dirt, metal filings, etc.) from entering 
the tubing.

N OT E

When reaming, hold the tube end downward and be sure that 
no copper scraps fall into the tube. 

(3)  Remove the flare nut from the unit and be sure to mount it 

on the copper tube.

(4)  Make a flare at the end of the copper tube with a flare tool.  

N OT E

A good flare should have the following characteristics:

  inside surface is glossy and smooth

  edge is smooth

  tapered sides are of uniform length

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)  Use a small amount of ether oil (PVE only) to apply 

refrigerant lubricant to the inside of the flare nut when 
making a flare connection. Pay careful attention to prevent 
the ether oil (PVE only) from directly attaching the screw 
and resin parts. This is effective for reducing gas leaks. 

(3)  For proper connection, align the union tube and flare tube 

straight with each other, then screw on the flare nut lightly 
at first to obtain a smooth match.

  Adjust the shape of the liquid tube using a tube bender at the 

installation site and connect it to the liquid tubing side valve using a 
flare.

Flare nut

Copper 
tubing

Flare tool

Apply a small amount of 
ether oil (PVE only) to the 
inside of the flare nut.

Flare nut

Union

Copper 
tubing

Reamer

After

Before

Deburring

01_350221_Eng.indb   35

2023/3/17   10:01:14

Summary of Contents for S-15MF3E5AN

Page 1: ...140 160 F3 Middle Static Pressure Duct S 73MF3E5AN S 90MF3E5AN S 106MF3E5AN S 112MF3E5AN S 140MF3E5AN S 160MF3E5AN ENGLISH Read through the Installation Instructions before you proceed with the insta...

Page 2: ...and Outdoor Units 5 3 Insulating the Refrigerant Tubing 5 4 Taping the Tubes 5 5 Finishing the Installation 6 HOW TO INSTALL THE TIMER REMOTE CONTROLLER OR HIGH SPEC WIRED REMOTE CONTROLLER OPTIONAL...

Page 3: ...e outlet or your certified dealer for additional instructions In Case of Improper Installation The manufacturer shall in no way be responsible for improper installation or maintenance service includin...

Page 4: ...CAUTION Keep the fire alarm and the air outlet at least 1 5 m away from the unit In Moist or Uneven Locations Use a raised concrete pad or concrete blocks to provide a solid level foundation for the o...

Page 5: ...liquid refrigerant carefully as it may cause frostbite When Servicing Be sure to turn off the power before servicing Turn the power OFF at the main power box mains wait at least 5 minutes until it is...

Page 6: ...t or the sharp aluminum fins of the outdoor unit You may get injured Do not stick any object into the FAN CASE You may be injured and the unit may be damaged NOTICE The English text is the original in...

Page 7: ...or unit from ceiling Flare insulator 2 For gas and liquid tubes Insulating tape 2 For gas and liquid tubes flare nuts Drain insulator 1 For drain hose joint Hose band 1 For securing drain hose Packing...

Page 8: ...ted copper wire for field wiring Wire size varies with the total length of wiring See Section 4 ELECTRICAL WIRING for details CAUTION Check local electrical codes and regulations before obtaining wire...

Page 9: ...pe have the shortest run to the outdoor unit allow room for operation and maintenance as well as unrestricted airflow around the unit the limitation of the tubing length between the indoor and the out...

Page 10: ...cleaning and maintenance of the drain pan the heat exchanger and filter fixed inlet Do not put any obstacle not to cause obstructing maintenance or cleaning works If the place where the ceiling mater...

Page 11: ...duct 200 mm Front side air intake 150 mm Make it possible to open close for maintenance services H Lower side air intake with duct 300 mm Lower side air intake without duct 200 mm Front side air inta...

Page 12: ...olt pitch 96 400 26 190 55 55 140 23 340 30 730 250 228 6 140 23 F 3 0 holes Inspection access 450 450 Field supply Inspection access Field supply See Section 3 1 a Refrigerant tubing joint liquid tub...

Page 13: ...ion on the sidewall front side air intake Front side air intake While in heating mode the temperatures may increase higher than the set temperature 3 2 2 Install the Filter When not connecting the air...

Page 14: ...tes 2 pcs Cover plate Cover plate 2 Attach the cover plates removed in Step 1 and filter accessory in the direction shown in the figure below B Cover plate Cover plate Screw Filter Accessory Type 60 7...

Page 15: ...bolts referring to the dimensional data as shown in the tables and diagrams under Section 3 1 Tubing must be laid and connected inside the ceiling when suspending the unit If the ceiling is already co...

Page 16: ...prevent overturning fasten the unit to the wall securely Check to make sure the wall and the bolts can endure 5 times of weight of the unit Ensure to fix the unit In order to suppress vibrations prov...

Page 17: ...sert the drain hose supplied to the hose band supplied and then install the drain hose to the unit drain port Insert until the drain hose bumps to the end Hose band screw torque is 30 35 N cm Connect...

Page 18: ...not raise it any higher than 500 mm as this could result in water leaks 300 mm or less 500 mm or less Good Do not install the pipe with an upward gradient from the connection port This will cause the...

Page 19: ...Drain cap Drain port Replace the connectors When installing the unit vertically disconnect the connectors of the drain pump 3 pin and the float switch 2 pin from the PCB Float switch connector 2 pin D...

Page 20: ...Change the Setting Data 0001 by pressing the or button Then press the button 6 Select the Code no by pressing the or button Change the Code no to 06 by pressing the or button or keeping it pressed 7 S...

Page 21: ...re setting buttons and confirm the values or set at shipment 4 Press the buttons for the time to amend the values for the set data Select 5 Press the button The display will stop blinking and remain i...

Page 22: ...utton to 000006 After selecting Code no press the button and proceed to Step 7 7 Select the Set data by pressing the or button 0004 set at shipment Change the Setting Data 0000 by pressing the or butt...

Page 23: ...is located facing upward Then tighten the insulator with a vinyl tape not to cause the detachment If the tubing parts remain exposed condensation may occur Be sure to use the supplied drain hose If ot...

Page 24: ...0 cc of water through the opening into the drain pan to check drainage 3 Short the check pin CHK 6P 1 4 on the indoor unit control PCB and operate the drain pump Check the water flow through the trans...

Page 25: ...self tapping screw Type 106 112 140 160 53 80 6 150 223 5 32 5 41 320 300 280 300 300 320 280 300 53 14 3 2 hole For M4 self tapping screw NOTE To get clean air and to extend the service life of the a...

Page 26: ...st be grounded 4 Each wiring connection must be done in accordance with the wiring system diagram Wrong wiring may cause the unit to misoperate or become damaged 5 Do not allow wiring to touch the ref...

Page 27: ...between outdoor and indoor units control wiring D Remote control wiring E Remote control wiring for group control Min 0 75 mm2 Use shielded wiring 3 Min 0 75 mm2 Min 0 75 mm2 Max 1 000 m Max 500 m Max...

Page 28: ...R1 L N U2 U1 R2 R1 L N U2 U1 R2 R1 L N U2 U1 R2 R1 U2 U1 2 1 C C C C L1 L2 L3 N L1 L2 L3 N 2 1 4 3 Wiring System Diagrams Functional earthing Power supply 220 230 240V 50 60Hz Power supply 220 230 240...

Page 29: ...nit Indoor unit Indoor unit Indoor unit Indoor unit NO Branch point 4 If branching the inter unit control wiring the number of branch points should be 16 or fewer Outdoor unit Outdoor unit Outdoor uni...

Page 30: ...nbraided shield wires tightly together Insulate the shield wires by covering them with an insulation tube or wrapping insulating tape around them 3 Remove coat of signal wire 4 Attach ring pressure te...

Page 31: ...wer supply L N Power supply cable Earth wiring Make the earth wiring 25 30 mm longer than connecting wires to L N To indoor unit No 3 U1 U2 To indoor unit No 3 R1 R2 To remote controller 1 2 Use this...

Page 32: ...ve Control PCB and the protective ground screw 3 Make the wire binding as shown below 1 Bindings of the Power cable 2 cores and the ground wire of the Solenoid Valve Kit Use 2 clamps supplied with the...

Page 33: ...R3 CZ P656HR3 CZ P856HR3 CZ P4160HR3 Read the Installation Instructions of Solenoid Valve Kit before installation Air intake side Solenoid Valve Relay Kit 3 Way connect wire Air intake side 3WAY 5P Bl...

Page 34: ...chedule timer power wiring through the wire saddle and connect it to T10 connector Connecting to other optional parts Connect to each connector of the indoor unit control PCB as shown below NOTE Be su...

Page 35: ...a flare at the end of the copper tube with a flare tool NOTE A good flare should have the following characteristics inside surface is glossy and smooth edge is smooth tapered sides are of uniform leng...

Page 36: ...erant leakage and cause injury or asphyxiation to room occupants For the flare nuts at tubing connections be sure to use the flare nuts that were supplied with the unit or else flare nuts for R410A ty...

Page 37: ...lare nuts at the gas liquid tube connections Then cover up the tubing connections with the flare insulator supplied Wrap with the flare insulator facing its seam upward Flare insulator supplied Insula...

Page 38: ...ing overlap half of each previous tape turn 3 Clamp the tubing bundle to the wall using 1 clamp approx each meter NOTE Do not wind the armoring tape too tightly since this will decrease the heat insul...

Page 39: ...ation manual and have the customer perform the actual steps Check that the 220 240 VAC power is not connected to the inter unit control wiring connector terminal If 220 240 VAC is accidentally applied...

Page 40: ...te of the unit 10 Was the check of the airtight test flared tube fitting and gas leakage on the welded portion performed If the gas leakage occurs the unit quality not only becomes inferior but affect...

Page 41: ...n the dotted lines and then make the setting accordingly a No setting modification Use as is at shipment there are cases in which the setting may differ from the shipment setting when reset after once...

Page 42: ...unit Start external static pressure setting No No No Yes Yes Yes Line A set at shipment on the PQ diagram was designed and installed Set static pressure setting to manual setting mode Wired remote co...

Page 43: ...n operations display will disappear once the external static pressure setting check or auto airflow volume control operation check have been completed for the main unit However it is not possible to d...

Page 44: ...ol PCB according to the setting selected in Table 10 1 Table 10 1 External static pressure of the rated airflow volume DIP switch 10 Pa TP6 TP3 TP1 1 2 3 1 2 3 TP6 TP3 TP1 ON 40 Pa Type 90 106 50 Pa T...

Page 45: ...no by pressing the or button Change the Code no to B0 by pressing the or button or keeping it pressed 5 Select the Set data by pressing the or button Select one of the Set data among 0001 0010 accordi...

Page 46: ...d perform the test run for the external static pressure setting described in Auto External Static Pressure Setting Operation Auto External Static Pressure Setting Operation 7 Keep pressing the and but...

Page 47: ...change automatically while these operations are in progress When these operations completed TEST will be disappeared from the LCD display Confirm Test run Change 20 30 THU Test run ON Maintenance fun...

Page 48: ...ta See Table 10 3 and Fig 10 2 and select a value between and Select if the auto airflow volume setting is activated 5 Press the button The display will stop blinking and remain illuminated 6 Press th...

Page 49: ...external static pressure setting check operations will not be performed unless the above settings are made 4 The fan motor will be activated and auto airflow volume control operations or external sta...

Page 50: ...ed After selecting Code no press the button and proceed to Step 5 5 Select the Set data by pressing the or button Select one of the Set data among 0001 0010 according to the desired external static pr...

Page 51: ...ay Detailed setting end screen appears Then select YES by pressing the or button and press the button Auto External Static Pressure Setting Operation 7 Keep pressing the and buttons simultaneously for...

Page 52: ...l be activated the auto external static pressure setting operation and setting check operation will be performed for about 3 to 30 minutes The fan speed will change automatically while these operation...

Page 53: ...line Indoor Units Type 15 22 28 H M L H M L A H M H M L L H M L H M L 0 20 40 60 80 100 120 140 160 180 10 15 20 0 20 40 60 80 100 120 140 160 180 10 15 20 0 20 40 60 80 100 120 140 160 180 10 15 20...

Page 54: ...Volume m3 minute External static pressure 150Pa 90Pa External static pressure 140Pa 70Pa External static pressure Pa External static pressure Pa External static pressure Pa External static pressure Pa...

Page 55: ...lume m3 minute External static pressure 150Pa 90Pa External static pressure 140Pa 70Pa External static pressure Pa External static pressure Pa External static pressure Pa External static pressure Pa E...

Page 56: ...rflow Volume m3 minute Airflow Volume m3 minute External static pressure 150Pa 90Pa External static pressure 140Pa 70Pa External static pressure Pa External static pressure Pa External static pressure...

Page 57: ...flow Volume m3 minute Airflow Volume m3 minute External static pressure 150Pa 90Pa External static pressure 140Pa 70Pa External static pressure Pa External static pressure Pa External static pressure...

Page 58: ...m3 minute Airflow Volume m3 minute External static pressure 150Pa 90Pa External static pressure 140Pa 70Pa External static pressure Pa External static pressure Pa External static pressure Pa External...

Page 59: ...Airflow Volume m3 minute External static pressure 150Pa 90Pa External static pressure 140Pa 70Pa External static pressure Pa External static pressure Pa External static pressure Pa External static pre...

Page 60: ...m3 minute Airflow Volume m3 minute External static pressure 150Pa 90Pa External static pressure 140Pa 70Pa External static pressure Pa External static pressure Pa External static pressure Pa External...

Page 61: ...aler or service center Air filter The air filter collects dust and other particles from the air and should be cleaned at regular intervals If the air conditioner does not cool or warm the air filter m...

Page 62: ...lt your dealer or service center Care After a prolonged idle period Check the indoor and outdoor unit air intakes and outlets for blockage if there is a blockage remove it Care Before a prolonged idle...

Page 63: ...peration Fan is rotating for a while even though operation stops Fan rotating makes operation smoothly Fan may sometimes rotate because of drying heat exchanger due to settings Fan may sometimes rotat...

Page 64: ...mode Doors and or windows are open Air filter is clogged See Section Care and Cleaning Too much heat sources in room in cooling mode Use minimum heat sources and in a short time Too many people in ro...

Page 65: ...ction Care and Cleaning A clogged filter will impair the performance of the unit To prevent conditioned air from escaping keep windows doors and any other openings closed NOTE Should the power fail wh...

Page 66: ...WEB ACXF60 50860 00 EN DC0223 0 01_350221_Eng indb 66 2023 3 17 10 01 21...

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