Table of Contents
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– FLOW LOGIC 3 pipe System Air Conditioner –
I R410A Models
Indoor Units
Indoor Unit Type
NKSFL 1-Way Air Discharge
Semi-Concealed Slim
NK2FL
2-Way Air Discharge ST-NK2FL7
Semi-Concealed
NKFL
4-Way Air Discharge ST-NKFL7
Semi-Concealed*
NWFL
Wall-Mounted
NPFL
Ceiling-Mounted
NDLP
Concealed-Duct
NDHP
Concealed-Duct
High Static Pressure**
NFFL
Floor-Standing
NFMFL
Concealed-Floor
Standing
** ST-NKFL60 is available.
** ST-NDHP76 and ST-NDHP96 are available.
Outdoor Units
EFL EFL 80-3R410, EFL 100-3R410, EFL 120-3R410, EFL 140-3R410, EFL 160-3R410
* Refrigerant R410A is used in the outdoor units.
Outdoor Units
Remote Controller
Wireless Remote Controller (For NKFL type)
Wireless Remote Controller (For NK2FL, NKSFL type)
Wireless Remote Controller (For NPFL type)
RC Wireless Remote Controller (For NDLP, NDHP, NFFL, NFMFL type)
Wireless Remote Controller (For NWFL type)
Simplified Remote Controller
RemoteSensor
System Controller
Schedule Timer
85464359748002 2005
INSTALLATION INSTRUCTIONS
for New Refrigerant R410A
7
9
12
ST-NKSFL9 ST-NKSFL12
ST-NK2FL9
ST-NK2FL12 ST-NK2FL16 ST-NK2FL18 ST-NK2FL24
ST-NKFL9
ST-NKFL12
ST-NWFL7
ST-NWFL9
ST-NWFL12
ST-NPFL12
ST-NDLP7
ST-NDLP9
ST-NDLP12
ST-NFFL7
ST-NFFL9
ST-NFFL12
ST-NFMFL7 ST-NFMFL9 ST-NFMFL12 ST-NFMFL16 ST-NFMFL18 ST-NFMFL24
16
18
ST-NKSFL18 ST-NKSFL24
ST-NKFL16
ST-NKFL18
ST-NKFL24
ST-NWFL16
ST-NWFL18
ST-NWFL24
ST-NPFL16
ST-NPFL18
ST-NPFL24
ST-NDLP16
ST-NDLP18
ST-NDLP24
ST-NDHP24
ST-NFFL16
ST-NFFL18
ST-NFFL24
NRCG-FL
RCIRK-FL
RCIRKS-FL
RCIRP-FL
RCIRK-FL
RCIRW
NRCB-FL
NSD
NRSC-FL
NWTM-FL
24
36
48
ST-NKFL36
ST-NKFL48
ST-NPFL36
ST-NPFL48
ST-NDLP36 ST-NDLP48
ST-NDHP36 ST-NDHP48
NKSFL
NK2FL
NKFL
NWFL
NPFL
NDLP
NDHP
NFFL
NFMFL
EFL
RC
W
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Related Manuals for Airwell ST-NKSFL9
Summary of Contents for Airwell ST-NKSFL9
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Page 1: Installation Instructions
– FLOW LOGIC 3 pipe System Air Conditioner – for New Refrigerant R410A I R410A Models NKSFL Indoor Units Indoor Unit Type NKSFL 1-Way Air Discharge ST-NKSFL9 ST-NKSFL12 ST-NKSFL18 ST-NKSFL24 Semi-Concealed Slim NK2FL NK2FL 2-Way Air Discharge ST-NK2FL7 ST-NK2FL9 ST-NK2FL12 ST-NK2FL16 ST-NK2FL18 ST-NK2FL24... -
Page 2: Important
IMPORTANT! When Installing… Please Read Before Starting …In a Room Properly insulate any tubing run inside a room to prevent This air conditioning system meets strict safety and operat- “sweating” that can cause dripping and water damage to ing standards. As the installer or service person, it is an walls and floors. -
Page 3: Check Of Density Limit
Check of Density Limit 2. The standards for minimum room volume are as follows. The room in which the air conditioner is to be (1) No partition (shaded portion) installed requires a design that in the event of refrigerant gas leaking out, its density will not exceed a set limit. -
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 Seam- less Pipes and Tubes.” For tubes of ø19.05 or larger, use C1220 T-1/2H material or H material, and do not bend the 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 I Wall-Mounted Type (NWFL Type) ..44 IMPORTANT ! ......2 Please Read Before Starting 3-14. - Page 7 Page Page 5. ELECTRICAL WIRING ....76 11. HOW TO INSTALL THE WIRELESS REMOTE 5-1. General Precautions on Wiring CONTROLLER RECEIVER ....115 5-2.
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Page 8: General
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 indoor and outdoor units and make sure all accessory parts listed are with the system before beginning. - Page 9 Table 1-2 (2-Way Air Discharge Semi-Concealed) Part name Figure Q’ty Remarks Flare insulator For gas and liquid tubes Insulating tape (White) For gas and liquid tube flare nuts Vinyl clamp For flare insulator and drain insulator Hose band For securing drain hose Packing For drain joint Drain insulator...
- Page 10 Table 1-5 (Ceiling-Mounted) Part name Figure Q’ty Remarks Special washer For temporarily suspending indoor unit from ceiling For drain hose joint Drain insulator Flare insulator 2 sets For gas and liquid tube joints White Insulating tape For gas and liquid flare joints (heat-resisting) For flare and drain insulator Vinyl clamp...
- Page 11 Table 1-8 (Floor-Standing & Concealed Floor-Standing) Part name Figure Q’ty Remarks Connection pipe For connecting gas tubes Flare insulator For gas and liquid tubes For gas and liquid tube flare nuts Insulating tape (White) For gas and liquid tubes Insulating tape (Black) Vinyl clamp For ends of flare insulator...
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Page 12: 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 LM = LA + LB … ≤ 80 m Main distribution tubes LC – LH are selected according to the capacity after the distribution joint. -
Page 13: Tubing Size
1-6. Tubing Size Table 1-11 Main Tubing Size (LA) Unit: mm 22.4 33.5 40.0 45.0 50.4 56.0 61.5 68.0 73.0 78.5 85.0 90.0 96.0 28.0 Total system horsepower Combined outdoor units ø25.40 Suction tubing (mm) ø19.05 ø22.22 ø28.58 ø28.58 ø31.75 Discharge tubing (mm) ø15.88 ø19.05... -
Page 14: Additional Refrigerant Charge
Table 1-14 Indoor Unit Tubing Connection ( Unit: mm Indoor unit type Total system horsepower Distribution (mm) ø19.05 Suction tubing ø22.22 ø15.88 joint – Discharge tubing (mm) ø15.88 ø19.05 ø12.70 solenoid valve kit tubing Liquid tubing (mm) ø9.52 Solenoid valve ø22.22 Gas tubing (mm) ø15.88... -
Page 15: System Limitations
Table 1-18 Refrigerant Charge Amount at Shipment (for outdoor unit) EFL 80-3R410 EFL 100-3R410 EFL 120-3R410 EFL 140-3R410 EFL 160-3R410 (kg) 1-9. System Limitations Table 1-19 System Limitations Max. No. allowable connected outdoor units Max. capacity allowable connected outdoor units 135 kW (48 hp) Max. -
Page 16: Installation Requirements
When adding ball valve for outdoor unit 1. Location: Install the ball valve at the main tube of the distribution joint. Outdoor unit for extension Ball valve (for extension) Distribution joint (Planned expansion) Balance tube (Suction tube) Discharge tube Main tube Main tube of distribution joint Liquid tube Less than 40 cm... -
Page 17: Check Of Limit Density
Minimum indoor volume & floor area as against the Always check the gas den- amount of refrigerant is roughly as given in the fol- sity limit for the room in WARNING lowing table. which the unit is installed. 1-11. Check of Limit Density 270.0 256.5 When installing an air conditioner in a room, it is neces-... -
Page 18: Optional Distribution Joint Kits
1-13. Optional Distribution Joint Kits See the installation instructions packaged with the distribution joint kit for the installation procedure. Table 1-20 Model name Cooling capacity after distribution Remarks 1. NRFO-3DL 68 68.0 kW or less For outdoor unit 2. NRFO-3D68135 135.0 kW or less For outdoor unit 3. - Page 19 Table 1-23 Dimensions for connections of each part Unit: mm Position Dimension ø38.1 ø31.75 ø28.58 ø25.4 ø22.22 ø19.05 ø15.88 ø12.7 ø9.52 – 3. NRF-DL 22 Use: For indoor unit (Capacity after distribution joint is 22.4 kW or less.) Example: (F below indicates inner diameter. below indicates outer diameter.) Liquid tubing Discharge tubing...
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Page 20: Optional Solenoid Valve Kit
1-14. Optional Solenoid Valve Kit • Specifications NK3V 718 NK3V 718 Part Types and specifications 2.2 ≤ Total capacity of indoor units (kW) < 5.6 of tubing connections Compatibility Gas tube: ø12.7 Power source Single-phase 200V 50/60Hz (supplied by indoor unit) Liquid tube: ø6.35 Power input 20 W... - Page 21 Screw (4 pcs.) Suspension hook Gas tube Upper surface Discharge tube Liquid tube Air holes Liquid tube Front Suction tube NOTE Notes on Installation • Be sure to secure the valve body by using its structure with the suspension hook, etc. •...
- Page 22 • Specifications NK3V 2548 Part Types and specifications NK3V 2548 tubing connections 5.6 ≤ Total capacity of indoor units (kW) < 16.0 Compatibility Gas tube: 15.88 Power source Single-phase 200V 50/60Hz (supplied by indoor unit) Liquid tube: 9.52 Power input 25 W Suspension hook Net weight...
- Page 23 Screw (4 pcs.) Suspension hook Gas tube Upper surface Discharge tube Liquid tube Air holes Liquid tube Front Suction tube NOTE Notes on Installation • Be sure to secure the valve body by using its structure with the suspension hook, etc. •...
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Page 24: Example Of Tubing Size Selection And Refrigerant Charge Amount
1-15. Example of Tubing Size Selection and Refrigerant Charge Amount Additional refrigerant charging Based on the values in Tables 1-12, 13, 14, 15 and 18, use the liquid tubing size and length, and calculate the amount of additional refrigerant charge using the formula below. Required additional = [366 ×... - Page 25 Obtain liquid tubing size from Tables 1-12, 13, 14, 15 and 18. Main tubing LO = ø15.88 m (Total capacity of outdoor unit is 56.0 kW) LA = ø19.05 m (Total capacity of indoor unit is 95.2 kW) The longest tubing length in this example LB = ø19.05 m (Total capacity of indoor unit is 79.2 kW) (LM = 40 + 5 = 45 m) LC = ø15.88 m (Total capacity of indoor unit is 68.0 kW)
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Page 26: Selecting The Installation Site
Ceiling-Mounted Type 2. SELECTING THE INSTALLATION SITE Ceiling 2-1. Indoor Unit Wall AVOID: areas where leakage of flammable gas may be min. 25 cm min. 25 cm expected. Front view places where large amounts of oil mist exist. NOTE direct sunlight. The rear of the indoor unit can be installed flush against the wall. -
Page 27: Outdoor Unit
2-2. Outdoor Unit Exhaust fan AVOID: Hot air heat sources, exhaust fans, etc. Heat damp, humid or uneven locations source Out- indoors (no-ventilation location) door unit choose a place as cool as possible. choose a place that is well ventilated. Fig. -
Page 28: Shield For Horizontal Exhaust Discharge
2-3. Shield for Horizontal Exhaust Discharge It is necessary to install an air-discharge chamber (field supply) to direct exhaust from the fan horizontal- ly if it is difficult to provide a minimum space of 2 m between the air-discharge outlet and a nearby obsta- cle. -
Page 29: Dimensions Of Wind Ducting
2-6. Dimensions of Wind Ducting Reference diagram for air-discharge chamber (field supply) Unit: mm Ceiling panel Ceiling panel Air direction: Front direction Air direction: Right direction 890 (Ceiling panel dimensions) 1106 1106 (Maximum bracket dimenions) (216) 890 (Ceiling panel dimensions) (216) (Ceiling panel dimensions) -
Page 30: Dimensions Of Snow Ducting
2-7. Dimensions of Snow Ducting Reference diagram for snow-proof vents (field supply) Air direction: Right direction example Air direction: Front direction example Ceiling panel Ceiling panel (Air intake duct) 1710 (Air outlet duct) (Ceiling panel Unit: mm (Ceiling panel dimensions) dimensions) (Ceiling panel dimensions) 1106... -
Page 31: How To Install The Indoor Unit
3. HOW TO INSTALL THE INDOOR UNIT Front face I 1-Way Air Discharge Semi-Concealed Slim Type (NKSFL Type) 3-1. Suspending the Indoor Unit Rear (1) Place the full-scale diagram (supplied) on the ceil- ing at the spot where you want to install the indoor Full-scale diagram unit. -
Page 32: Placing The Unit Inside The Ceiling
(5) If the system requires fresh air to be drawn into Unit: mm the unit, cut and remove the insulation (both exter- nally and internally) at the location shown as in Fig. 3-6. 3-2. Placing the Unit Inside the Ceiling Fresh air intake Power supply (1) When placing the unit inside the ceiling, determine... -
Page 33: Installing The Drain Piping
3-3. Installing the Drain Piping (1) Prepare standard hard PVC pipe (O.D. 32 mm) for Align the hose band with end of the the drain and use the supplied drain hose and hose hose, and tighten so that it does not band to prevent water leaks. -
Page 34: Checking The Drainage
Air bleeder prohibited CAUTION Do not install an air bleeder as this may cause water to spray from the drain pipe outlet. Fig. 3-11 (Fig. 3-11) If it is necessary to increase the height of the drain 30 cm or less NKSFL pipe, the pipe can be raised a maximum of 59 cm (as short as possible) - Page 35 (4) When the check of drainage is complete, open the check pin (CHK) and remount the insulator. Use 4 × × 8 tapping screws to CAUTION fasten cover drainage. If the screws used are longer than 8 mm, it may make a hole in the drain pan and cause leakage.
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Page 36: I 2-Way Air Discharge Semi-Concealed Type
I 2-Way Air Discharge Semi-Concealed Type (NK2FL Type) 3-5. Suspending the Indoor Unit (1) Follow the diagrams to make the holes in the ceil- Center of panel ing. and ceiling opening Table 3-2 Unit: mm 7, 9, 12, 16, 18 1,020 1,320 1,220... -
Page 37: Placing The Unit Inside The Ceiling
(5) If the system requires fresh air to be drawn into the unit, cut and remove the insulation (both exter- nally and internally) at the location shown as in Fig. 3-22. When making the cuts to the insulation, be careful not to CAUTION damage the drain pan. - Page 38 (2) After checking the drainage, wrap the supplied Drain insulator (supplied) packing and drain pipe insulator around the pipe, then secure it with the supplied clamps. (Fig. 3-26) NOTE Make sure the drain pipe has a downward gradient Vinyl clamps (1/100 or more) and that there are no water traps.
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Page 39: Checking The Drainage
3-8. Checking the Drainage After wiring and drain piping are completed, use the following procedure to check that the water will drain smoothly. For this, prepare a bucket and wiping cloth to catch and wipe up spilled water. (1) Connect power to the power terminal board (R, S terminals) inside the electrical component box. -
Page 40: I 4-Way Air Discharge Semi-Concealed Type
I 4-Way Air Discharge Semi-Concealed Type (NKFL Type) Note: For DC Fan Tap Change Procedure for 4-Way Cassette, see page 132. 3-9. Preparation for Suspending This unit uses a drain pump. Use a carpenter’s level to check that the unit is level. Hole-in-anchor Hole-in-plug Concrete... -
Page 41: Placing The Unit Inside The Ceiling
3-11. Placing the Unit Inside the Ceiling (1) When placing the unit inside the ceiling, determine the pitch of the suspension bolts using the sup- plied full-scale installation diagram. (Fig. 3-35) Tubing and wiring must be laid inside the ceiling when suspending the unit. -
Page 42: Installing The Drain Piping
3-12. Installing the Drain Piping (1) Prepare a standard hard PVC pipe (O.D. 32 mm) for the drain and use the supplied drain hose and hose band to prevent water leaks. Hard PVC The PVC pipe must be purchased separately. The socket Hard PVC pipe Hose band... -
Page 43: Checking The Drainage
If it is necessary to increase the height of CAUTION the drain pipe, the sec- tion directly after the 30 cm or less (as short as possible) connection port can be 64 cm or less raised a maximum of 64 cm. -
Page 44: I Wall-Mounted Type (Nwfl Type)
I Wall-Mounted Type (NWFL Type) 3-14. Removing the Rear Panel from the Unit (1) Remove the set screws used to fasten the rear panel to the indoor unit during transportation. (2) Press up on the frame at the 2 locations shown by Screws used during the arrows in the figure at right, and remove the transportation... -
Page 45: Installing The Rear Panel Onto The Wall
3-16. Installing the Rear Panel Onto the Wall Confirm that the wall is strong enough to support the unit. See either Item a) or b) below depending on the wall type. a) If the Wall is Wooden (1) Attach the rear panel to the wall with the 10 screws Fig. -
Page 46: Preparing The Tubing
3-18. Preparing the Tubing Frame (1) Arrangement of tubing by directions a) Right or left tubing Right tubing outlet The corner of the right or left frame should be cut with a hack saw or similar tool. (Fig. 3-56) b) Right-rear or left-rear tubing When left and right side tubing In this case, the corners of the frame do not Fig. -
Page 47: Installing The Drain Hose
Left or left-rear tubing (1) Pass the tubing and drain hose into the rear of the indoor unit. Provide sufficient length for the con- nections to be made. Insulation Next, bend the tubing with a pipe bender, and con- Fig. 3-61 nect them. -
Page 48: I Ceiling-Mounted Type (Npfl Type)
I Ceiling Mounted Type (NPFL Type) 3-21. Required Minimum Space for Installation and Service (1) Dimensions of suspension bolt pitch and unit Length Type Air intake 12, 16, 18 1125 1180 Ceiling side 36, 48 1540 1595 27.5 27.5 Unit: mm (Suspension bolt pitch) Fig. -
Page 49: Suspending The Indoor Unit
(4) Wall and ceiling side opening position Figure shows view from front Figure shows view from top Ceiling Wall ø100 ceiling opening ø100 wall side opening ø100 wall side opening ø100 ceiling opening (for left-side drain hose) Unit: mm * If the optional drain up kit is installed, create a ø100 hole along the dotted line (part marked with * in figure). Fig. - Page 50 (5) Before suspending the indoor unit, remove the 2 Pull out the or 3 screws on the latch of the air-intake grilles, air-intake grille pushing claws open the grilles, and remove them by pushing the Hinge of the hinges claws of the hinges as shown in Fig. 3-72a. Then Screw remove both side panels sliding them along the Latch...
- Page 51 b) Lift the indoor unit, and place it on the washers through the notches, in order to fix it in place. (Fig. 3-74) c) Tighten the 2 hexagonal nuts on each suspen- sion bolt to suspend the indoor unit as shown in Fig.
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Page 52: Duct For Fresh Air
3-23. Duct for Fresh Air Rear outlet port There is a duct connection port (knock-out hole) at Outside air intake duct Remote controller connection port the right-rear of the top panel of the indoor unit for wiring inlet port (ø100, knock-out) drawing in fresh air. - Page 53 If other commercially available hose bands are used, the drain hose may become pinched or wrin- kled and there is danger of water leakage. There- Min. 1/100 fore be sure to use the supplied hose bands. When sliding the hose bands, be careful to avoid scratch- ing the drain hose.
- Page 54 How to carry out power supply wiring (1) Wiring connection ports The power inlet ports are located at the rear and top. The remote controller wiring inlet ports are located at the rear and top (for use with the wired remote con- troller).
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Page 55: I Concealed-Duct Type (Ndlp Type)
I Concealed-Duct Type (NDLP Type) 3-26. Required Minimum Space for Installation and A (Suspension bolt pitch) Electrical Service component box This air conditioner is usually installed above the ceiling so that the indoor unit and ducts are not visible. Only Inspection access Indoor unit... -
Page 56: Suspending The Indoor Unit
3-27. Suspending the Indoor Unit Depending on the ceiling type: • Insert suspension bolts as shown in Fig. 3-84 Hole-in-anchor Hole-in-plug Concrete Insert • Use existing ceiling supports or construct a suit- able support as shown in Fig. 3-85. It is important that you use WARNING extreme care in supporting the indoor unit inside the... -
Page 57: Installing The Drain Piping
Fig. 3-88 shows an example of installation. Bolt anchor Air outlet duct Suspension bolt Air-intake duct Air-outlet grille Ceiling material Indoor unit Air-intake grille Fig. 3-88 3-28. Installing the Drain Piping (1) Prepare standard hard PVC pipe (O.D. 32 mm) for the drain and use the supplied hose band to pre- Align the hose band with end of the vent water leaks. -
Page 58: Checking The Drainage
Do not install an air bleed- Air bleeder er as this may cause water CAUTION to spray from the drain pipe outlet. (Fig. 3-90) Prohibited If it is necessary to increase the height of the Fig. 3-90 drain pipe, the section directly after the con- nection port can be raised a maximum of 50 cm. -
Page 59: Increasing The Fan Speed
3-30. Increasing the Fan Speed Electrical component box If external static pressure is too great (due to long Booster cable extension of ducts, for example), the air flow volume Booster cable motor may drop too low at each air outlet. This problem may be solved by increasing the fan speed using the fol- Fan motor socket lowing procedure:... -
Page 60: I Concealed-Duct High Static Pressure Type
(mm) I Concealed-Duct High Static Pressure Type (NDHP Type) Min. 600 (Space for service) 3-31. Required Minimum Space for Installation and Service (24, 36, 48 Type) This air conditioner is usually installed above the Suspension bolt pitch ceiling so that the indoor unit and ducts are not vis- ible. -
Page 61: Required Minimum Space For Installation And Service (76, 96 Type)
3-32. Required Minimum Space for Installation (mm) and Service (76, 96 Type) 1170 Min. 600 (Suspension bolt pitch) (Space for 1100 This air conditioner is usually installed above the service) ceiling so that the indoor unit and ducts are not vis- ible. -
Page 62: Suspending The Indoor Unit
3-33. Suspending the Indoor Unit Hole-in-anchor Hole-in-plug Concrete Inser t Depending on the ceiling type: Insert suspension bolts as shown in Fig. 3-99 Use existing ceiling supports or construct a suitable support as shown in Fig. 3-100. Suspension bolt (M10 or 3/8") (field supply) It is important that you use Fig. -
Page 63: Installing The Refrigerant Tubing
3-34. Installing the Refrigerant Tubing The size of the refrigerant tubing is as shown in the table below. Table 3-8 76 Type 96 Type Gas tube (mm) ø19.05 (Brazing connection) ø22.22 (Brazing connection) Liquid tube (mm) ø9.52 (Flare connection) ø9.52 (Flare connection) When brazing the gas tubing, cool the tubing with Thermistor (inside unit) dampened shopcloths as you work, as shown in... -
Page 64: Installing The Drain Piping
3-35. Installing the Drain Piping (1) Prepare standard hard PVC pipe (O.D. 32 mm) for Sealing tape the drain and use the supplied drain socket to pre- vent water leaks. The PVC pipe must be pur- chased separately. When doing this, apply adhesive for the PVC pipe at the connection point. -
Page 65: Caution For Ducting Work
3-36. Caution for Ducting Work This unit has high static pressure (applicable external static pressure Max. 167 to 216 pa (17–22 mm Aq.) In the case of small pressure resistance (for instance, a short duct), install a damper for adjust- ing air flow volume as air flow volume / air flow noise increases. -
Page 66: Increasing The Fan Speed (96 Type Only)
3-37. Increasing the Fan Speed (96 Type only) If external static pressure is too great (due to long extension of ducts, for example), the air flow volume may drop too low at each air outlet. This problem may be solved by increasing the fan speed using the fol- Electrical component box lowing procedure: Booster cable... -
Page 67: I Floor-Standing Type (Nffl Type)
I Floor-Standing Type (NFFL Type) Concealed Floor -Standing Type (NFMFL Type) 3-38. Required Minimum Space for Installation and Horizontal view Vertical view Service min. min. 10 cm 10 cm Install the unit where cooled or heated air from the unit min. - Page 68 Concealed Floor-Standing Type (NFMFL Type) 4-ø12 holes (for fastening the indoor unit to the floor with screws) Air filter Refrigerant connection outlet (liquid tube) Refrigerant connection outlet (gas tube) Level adjusting bolt Drain outlet (20A) Flange for air-outlet duct Table 3-10 Unit: mm Length Liquid...
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Page 69: Removing And Attaching The Front Panel
3-40. Removing and Attaching the Front Panel (Floor-Standing Type) NOTE A dew-prevention heater is secured behind the front panel. When removing or attaching the panel, take care not to damage the lead wire to the heater. How to remove the front panel (1) Remove the 2 screws at the lower part of the front panel. - Page 70 Insulate both gas and CAUTION liquid tubes. To insulate tubes (1) Wrap the flare nuts with the supplied white insulat- ing tape. (2) Wrap the flare nuts with the supplied flare insula- tor. (3) Fill the clearance between the union insulator and flare insulator with black insulating tape.
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Page 71: Installing The Drain Piping
3-42. Installing the Drain Piping Water leaks may occur CAUTION if the drain pipes are connected inadequately. (1) When rear-side drain piping is required bend the drain hose attached to the indoor unit by 90°. Connect a drain pipe (field supply) to the drain hose through the rear tubing outlet in the rear panel. -
Page 72: How To Install The Outdoor Unit
4. HOW TO INSTALL THE OUTDOOR UNIT 4-1. 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. 4-1) CAUTION When hoisting the outdoor unit, pass ropes or straps under the bottom plate as shown in the figure at right. -
Page 73: Remove The Brackets That Were Used For Transport
4-3. Remove the Brackets that Were Used for Transport After installing the unit, remove the 2 transport brackets from the front and rear (4 brackets total). Remove the 2 screws (8 screws total) Remove the 2 transport brackets from the front and rear (4 brackets total) Fig. -
Page 74: Prepare The Tubing
4-5. 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 ø25.4 or larger, use 1/2H material or H material. For all others use O material.) Tubing size Use the tubing size indicated in the table below. - Page 75 140 Type (14 horsepower) Refrigerant Use supplied Connection method tubing connector tube? Yes (ø19.05 → ø25.4) Brazed connection Suction tube Yes (ø15.88 → ø19.05) Brazed connection Discharge tube Yes (ø9.52 → ø12.7) Liquid tube Brazed connection Flared connection Balance tube 160 Type (16 horsepower) Refrigerant Use supplied...
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Page 76: Electrical Wiring
5. ELECTRICAL WIRING 5-1. General Precautions on Wiring (1) Before wiring, confirm the rated voltage of the unit (7) Regulations on wire diameters differ from locality as shown on its nameplate, then carry out the to locality. For field wiring rules, please refer to wiring closely following the wiring diagram. -
Page 77: Wiring System Diagram
5-3. Wiring System Diagram Indoor unit (No. 1) Power supply Outdoor unit 220-240V 50Hz INV unit Ground Power supply 380-415V-3N 50Hz Remote controller Ground Ground Ground Ground Indoor Ground unit (No. 2) Inter-outdoor-unit control wiring Power supply Ground 220-240V 50Hz Outdoor unit Ground INV unit... - Page 78 CAUTION (1) When linking outdoor units in a network (S-net link system), 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.) Otherwise the communication of S-net link system is not performed.
- Page 79 (5) Use shielded wires for inter-unit control wiring (c) and ground the shield on both sides, other- wise misoperation from noise may occur. (Fig. 5-4) Connect wiring as shown in Section “5-3. Shielded wire Wiring System Diagram.” Ground Ground Loose wiring may cause the terminal to overheat or WARNING result in unit malfunction.
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Page 80: How To Install The Remote Controller (Optional Part)
6. HOW TO INSTALL THE REMOTE Do not supply power to the CONTROLLER (OPTIONAL PART) unit or try to operate it until CAUTION the tubing and wiring to the Remote controller wiring can be extended to a maxi- outdoor unit is completed. mum of 1,000 m. -
Page 81: Basic Wiring Diagram
6-2. Basic Wiring Diagram Install wiring correctly Remote CAUTION (incorrect wiring will dam- control wiring age the equipment). Group Standard Multiple remote control remote control control Connection wiring for group control Use shielded wires for remote control wiring and ground the shield on the indoor unit side. (Fig. 6-3) Terminal Otherwise misoperation due to electrical noise may Indoor unit... - Page 82 Setting the main and sub remote controllers 1. Set 1 of the 2 connected remote controllers as the main remote controller. 2. On the other remote controller (sub-remote controller), switch the remote controller address connector on the rear of the remote controller PCB from Main to Sub. When the connector has been switched, the remote con- troller will function as the sub-remote controller.
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Page 83: Switching The Room Temperature Sensors
6-4. Switching the Room Temperature Sensors Room temperature sensors are contained in the indoor unit and in the remote controller. One or the other of the temperature sensors is used for operation. Normally, the indoor unit sensor is set; however, the procedure below can be used to switch to the remote controller sensor. -
Page 84: Wiring The Remote Controller
6-6. Wiring the Remote Controller <Flush Mounting> G Connection diagram Approx. 200 mm Remote Terminal board for controller indoor unit remote unit controller wiring Connector Power wire from remote Remote controller wiring controller unit (field supply) G Use 0.5 mm –... -
Page 85: Meanings Of Alarm Messages
6-7. 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. Viewing the LED 1 and 2 (D72 and D75) alarm displays LED 2 LED 1... - Page 86 Alarm Possible cause of malfunction message Activation of Compressor thermal protector is activated. Protective device in outdoor unit Power supply voltage is unusual. (The voltage is more than 260 V protective is activated. or less than 160 V between L and N phase.) device Incorrect discharge temperature.
- Page 87 Alarm messages displayed on system controller Indoor or main outdoor unit is not operating correctly. Serial Error in transmitting serial Mis-wiring of control wiring between indoor unit, main outdoor unit communication communication signal and system controller. errors Mis-setting Error in receiving serial Indoor or main outdoor unit is not operating correctly.
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Page 88: How To Process Tubing
7. HOW TO PROCESS TUBING Deburring The liquld tubing side is connected by a flare nut, and Before After the gas tubing side is connected by brazing. 7-1. 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. -
Page 89: Connecting Tubing 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 lubricant here and here (2) Be sure to apply refrigerant lubricant to the match- ing surfaces of the flare and union before connect- Fig. -
Page 90: Insulating The Refrigerant Tubing
Two tubes arranged together 7-3. Insulating the Refrigerant Tubing Tubing Insulation Liquid tubing Gas tubing Thermal insulation must be applied to all unit tubing, including distribution joint (purchased separately). * For gas tubing, the insulation material must be heat resistant to 120°C or above. For other tubing, it Insulation must be heat resistant to 80°C or above. -
Page 91: Taping The Tubes
7-4. 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 pre- vent the condensation from overflowing the drain pan, keep the drain hose separate from the refrigerant tubing. -
Page 92: Air Purging
8. AIR PURGING Manifold gauge Vacuum pump Outlet Air and moisture in the refrigerant system may have Inlet 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. - Page 93 (4) Do a leak test of all joints of the tubing (both Manifold valve indoor and outdoor) and all service valves. Bub- bles indicate a leak. Wipe off the soap with a clean Pressure cloth after a leak test. gauge (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 94 Manifold valve NOTE Pressure The required time in the above table is calculated gauge based on the assumption that the ideal (or target) vacuum condition is less than 667 Pa (–755 mm Hg, Valve 5 Torr). (2) When the desired vacuum is reached, close the “Lo”...
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Page 95: How To Install The Ceiling Panel
9. HOW TO INSTALL THE CEILING PANEL I 1-Way Air Discharge Semi-Concealed Slim Type (NKSFL Type) 9-1. Installing the Ceiling Panel (1) Hook the 2 panel catches of the ceiling panel to the tubing side (stationary side) of the indoor unit. Then, press up on the opposite side to engage the NKSFL level catch to install by opening the level catch... - Page 96 (4) Check to see that the ceiling panel is properly aligned with the seamline of the ceiling. If not, readjust the indoor unit by adjusting the nuts to the proper suspension point. (Fig. 9-3) Suspension bolt (5) For attaching and removing the side panels, see Nut, washer Fig.
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Page 97: I 2-Way Air Discharge Semi-Concealed Type
I 2-Way Air Discharge Semi-Concealed Type Indoor unit (NK2FL Type) 9-2. Before Installing the Ceiling Panel (1) Adjust the distance between the unit and the sur- face of the ceiling (60 mm) using the 2 hexagonal nuts as shown in Fig. 9-5 while following the Ceiling installation gauge. -
Page 98: Installing The Ceiling Panel
9-3. Installing the Ceiling Panel (1) Lift the ceiling panel and position it to align the Panel catch (level catch side) Panel catch (stationary side) panel catches with the catch recesses of the indoor unit. (2) Hook the stationary catch first and then press up on the opposite side to engage the level catch to install as shown in Fig. -
Page 99: I 4-Way Air Discharge Semi-Concealed Type
I 4-Way Air Discharge Semi-Concealed Type must be within the range of 12 – 17 mm. If not within this range, malfunction or other trouble may result. (NKFL Type) Checking the unit position Main unit (1) Check that the ceiling hole is within this range: 860 ×... -
Page 100: Installing The Ceiling Panel
9-6. Installing the Ceiling Panel Square hole in unit The power must be turned ON in order to change the flap angle. (Do not attempt to move the flap by hand. Doing so may damage the flap.) Push when Temporary you remove fastener (1) Insert the temporary fasteners (stainless steel) on... -
Page 101: Wiring The Ceiling Panel
9-7. Wiring the Ceiling Panel (Direction that the unit faces has been changed to facilitate explanation.) (1) Open the cover of the electrical component box. Electrical component (2) Connect the 7P wiring connector (red) from the box cover ceiling panel to the connector in the unit electrical component box. -
Page 102: Checking After Installation
9-9. Checking After Installation Check that there are no gaps between the unit and the ceiling panel, or between the ceiling panel and the ceiling surface. Gaps may cause water leakage and condensation. Check that the wiring is securely connected. If it is not securely connected, the auto flap will not operate. -
Page 103: Test Run
10. TEST RUN 10-1. Preparing for Test Run Before attempting to start the air conditioner, check the following. (1) The control wiring is correctly connected and all electrical connections are tight. (Power must be turned ON at least 5 hours before (2) The transportation pads for the indoor fan have attempting test run) been removed. -
Page 104: Test Run Procedure
10-2. Test Run Procedure Items to Check Before the Test Run Recheck the items to check before the test run. 1. Turn the remote power switch on at least 5 hours before the test, in order to energize the crank case heater. Have the outdoor sub units been connected? 2. -
Page 105: Main Outdoor Unit Pcb Setting
10-3. Main Outdoor Unit PCB Setting S002 S005 S004 S006 S007 S003 CN100 CN101 CN003 Fig. 10-4... - Page 106 G 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...
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Page 107: Auto Address Setting
10-4. 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. 1 (main unit) settings No. - Page 108 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 main unit PCBs except for 1. No. 1 (main unit) settings Alternatively, move the sockets to the “OPEN”...
- Page 109 Case 1 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 1. On the outdoor main unit control PCB, check that the system address rotary switch (S002) is set to “1” and that the DIP switch (S003) is set to “0”...
- Page 110 Case 2 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. Automatic Address Setting from Outdoor Unit Case 1 1.
- Page 111 Case 3 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. Automatic address setting can be performed during Cooling operation.
- Page 112 Display during automatic address setting On outdoor main unit PCB * Do not short-circuit the automatic address setting pin (CN100) again while automatic address setting is in progress. Doing so will cancel the setting operation and will cause LEDs 1 and 2 to turn OFF. Blink alternately * When automatic address setting has been successfully completed, both LEDs 1 and 2 turn OFF.
- Page 113 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 removed easily.
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Page 114: Caution For Pump Down
Remote Controller Test Run Settings 1. Press the remote controller button for 4 seconds or longer. Then press the button. “TEST RUN” appears on the LCD display while the test run is in progress. The temperature cannot be adjusted when in Test Run mode. (This mode places a heavy load on the machines. -
Page 115: How To Install The Wireless Remote Controller Receiver
11. HOW TO INSTALL THE WIRELESS REMOTE CONTROLLER RECEIVER I RCIRK-FL for 4-Way Cassette (NKFL Type) Indoor unit Indoor unit 11-1. Installing the Receiver Unit drain tube side refrigerant tube side The only corner where the receiver unit can be installed is the one shown in Fig. -
Page 116: Accessories
11-2. Accessories Q'ty Parts Q'ty Parts AAA alkaline battery Receiver Tapping screw unit 4 × 16 Clamp Remote Fastening screw control unit 4 × 12 Remote control holder 11-3. Wiring the Receiver Unit Connection diagram Receiver PCB Indoor unit NKFL CN001 Remote controller Terminal board... -
Page 117: How To Use The Test Run Setting
(1) To assign the wired remote controller as the sub unit, locate the address connector at the rear of the wired remote controller PCB and disconnect it. Reconnect it to the sub unit position. (2) To assign the wireless remote controller as the sub unit, locate the dip switch [S003] on the wire- less receiver unit PCB. -
Page 118: I Rcirp-Fl For Ceiling Mounted (Npfl Type)
I RCIRP-FL for Ceiling Mounted (NPFL Type) Side panel 11-6. Installing the Receiver Unit Panel (1) To take off the side panel, open the intake grille and remove the screw. Then remove the side panel by moving it toward the front (direction of arrow). -
Page 119: Accessories Supplied With Unit
11-7. Accessories Supplied with Unit Parts Parts Q'ty Q'ty AAA alkaline battery Receiver unit Tapping screw Remote control 4 × 16 unit Remote control holder 11-8. Wiring the Receiver Unit Connection diagram Receiver unit Indoor unit Remote CN001 controller terminal board 2PWHT Connect the provided wire (already connected to the... -
Page 120: How To Use The Test Run Setting
When 1 indoor unit is operated with 2 remote controllers: (The indoor unit runs according to which of the remote controllers is assigned as the main or sub unit.) * Use field wiring cables with a Wireless receiver unit Wired remote controller cross-sectional area of at least (main) (sub) -
Page 121: I Rcirks-Fl For 2-Way And High Ceiling
I RCIRKS-FL for 2-Way and High Ceiling Cover A Cover B 1-Way Type (NK2FL, NKSFL Type) Display For 2-way Cassette Type (NK2FL Type) 11-11. Installing the Display Spread Remove panel cover A and install the display. (1) Remove cover A from the rear side of the panel. (2) Cover B is fit inside cover A. -
Page 122: Installing The Display
For 1-Way Air Discharge High-Ceiling Cassette Type (NKSFL Type) 11-13. Installing the Display Remove the side panel and ceiling panel. Install Ceiling panel hole the display. Use tape to fasten (1) Remove the side panel. a) Press the tabs on both sides of the side panel to disengage the lock. -
Page 123: Accessories
(4) Attach the ceiling panel. Service cover Control unit (5) Open the air-intake grille. Connect the display and the control unit 6P relay connector (white). Vinyl clamp At this time, pass the lead wire from the display through the notch in the main unit, and use the supplied vinyl clamp to bind the lead wire. - Page 124 The wireless receiver unit components cannot be CAUTION used for more than 1 indoor unit at a time. (However, separate receiver units may be used simulta- neously.) When a wireless receiver NKSFL unit and a wired remote controller are used simulta- neously, assign either the wireless remote controller or the wired remote con-...
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Page 125: How To Use The Test Run Setting
11-18. How to Use the Test Run Setting 1. Set DIP switch [DS] No. 1 on the wireless receiver DS switch “1” unit PCB from OFF to the ON position. 2. All indicator lamps in the display section blink dur- Sub remote ing test run operation. -
Page 126: Nfmfl Type
I RCIRC-FL for NDLP, NDHP, NFFL, NFMFL Type 11-19. Accessories Supplied with Separate Receiver Unit Q'ty Parts Q'ty Parts Separate Spacer receiver unit (provided 200mm Wire joints power cable) Plate mounting Clamp Pattern template 95 × 51 Screws M4 × 25 unit: mm Screws M4 ×... - Page 127 For flush mounting into a wall, install the separate Face plate receiver unit in a metal switch box (field supply) that has been recessed into the wall in advance. 1. Insert a flathead screwdriver or similar tool into the notch, and remove the face plate. 2.
- Page 128 If the separate receiver unit is installed on the ceil- ing, use the provided ceiling mounting bracket for installation. 1. Insert a screwdriver or similar tool into the notch at the bottom to remove the receiver nameplate. 2. Cut a section out of the ceiling along the provided paper pattern (95 ×...
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Page 129: Wiring The Separate Receiver Unit
11-22. Wiring the Separate Receiver Unit * Use wires that are 0.5 mm – 2 mm in diameter. * The wiring length must not exceed 400 m. <Flush Mounting> Connection diagram Indoor unit Separate remote controller receiver unit terminal board Wire of Power wire from receiver unit... -
Page 130: Important Information For Installation Of
11-23. Important Information for Installation of 2 Separate Receiver Units When using 2 receiver units to operate 1 or more indoor units at the same time, follow the procedure below to install them. Installation method 1. If 2 remote controllers are installed, set one of them as the “main remote controller”... -
Page 131: Test Run Setting
11-24. Test Run Setting 1. Remove the receiver unit face plate, and set the DIP switch to “Test Run - ON” position. 2. Run the air conditioner using the wireless remote controller by pressing the “ON/OFF” button. All LEDs (“RUN,” “TIMER” and “STANDBY”) blink during test run operation. -
Page 132: Special Remarks
12. SPECIAL REMARKS I DC Fan Tap Change Procedure for 4-Way Cassette (NKFL Type) <Steps> Be sure to turn OFF the power (at mains) before beginning the work below. (1) In the table below, check the field-supply parts that will be used. (If this setting is not made, the airflow may decrease and condensation may occur.) Setting Air shield material (for use with 3-direction discharge)*... -
Page 133: Markings For Directive
13. MARKINGS FOR DIRECTIVE 97/23/EC (PED) Rating nameplate figure Airwell 0035 arious A: Model Name Various AIR CONDITIONER SOURCE: Various 50 Hz MAX ELECTRIC INPUT Various TIME DELAY FUSE MAX SIZE: A Various UNIT PROTECTION: IPX4 Operating Spec. Area (Not for the PED) Various MAX.
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