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VRF SYSTEM
INDOOR UNIT
Cassette Type
INSTALLATION MANUAL
For authorized service personnel only.
Contents
1. SAFETY PRECAUTIONS ............................................. 2
2.1. Precautions for using the R410A refrigerant .......... 2
2.2. Special tool for R410A ............................................ 2
2.3. Accessories ............................................................ 2
2.4. Optional parts ......................................................... 3
3.1. Selecting an installation location ............................ 3
3.2. Installation dimensions ........................................... 4
3.3. Installing the unit .................................................... 5
4.1. Selecting the pipe material ..................................... 7
4.2. Pipe requirement .................................................... 7
4.3. Flare connection (pipe connection) ........................ 7
4.4. Installing heat insulation ......................................... 8
5. INSTALLING DRAIN PIPES .......................................... 9
6.1. Electrical requirement .......................................... 11
6.2. Wiring method ...................................................... 11
6.3. Unit wiring ............................................................ 11
6.4. Connection of wiring ............................................. 13
(Optional parts) .................................................. 14
7.1. Setting the address .............................................. 16
7.2. Custom code setting ............................................ 17
7.3. Function setting .................................................... 18
8. DECORATION PANEL INSTALLATION ...................... 19
9.1. Test operation using PCB (Outdoor unit) ............. 19
9.2. Test operation using Remote Controller ............... 19
10. CHECK LIST ............................................................... 19
11. ERROR CODES ......................................................... 20
PART NO. 9371022208-02
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Summary of Contents for Nordic VRF SYSTEM
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Page 1: Table Of Contents
VRF SYSTEM INDOOR UNIT Cassette Type INSTALLATION MANUAL For authorized service personnel only. Contents 1. SAFETY PRECAUTIONS ..........2 6. ELECTRICAL WIRING 6.1. Electrical requirement .......... 11 2. ABOUT THE UNIT 6.2. Wiring method ............11 2.1. Precautions for using the R410A refrigerant ..2 6.3. -
Page 2: Safety Precautions
1. SAFETY PRECAUTIONS 2.2. Special tool for R410A • Be sure to read this Manual thoroughly before installation. WARNING • The warnings and precautions indicated in this Manual • To install a unit that uses the R410A refrigerant, use contain important information pertaining to your safety. Be dedicated tools and piping materials that have been sure to observe them. -
Page 3: Optional Parts
2.4. Optional parts Name and Shape Q’ty Application Operation Manual The following options are available. • External output wire (P/N 9379529006) • External input (voltage) wire (P/N 9368779016) • External input (no voltage) wire (P/N 9368779009) Installation Manual (This book) 3. -
Page 4: Installation Dimensions
• Decide the mounting position with the customer as • Discharge Direction Setting follows: • The discharge direction can be selected as shown below. (1) Install the indoor unit on a place having a suffi cient strength so that it withstands against the weight of the indoor unit. (2) The inlet and outlet ports should not be obstructed;... -
Page 5: Installing The Unit
• Refrigerant piping and drain piping positions. 3.3. Installing the unit WARNING • Install the air conditioner in a location which can withstand a load do at least 5 times the weight of the main unit and which will not amplify sound or vibration. If the installation location is not strong enough, the indoor unit may fall and cause injuries. - Page 6 Note: 3.3.3. Body installation Conduct proper insulation when connecting the distribution (1) Install the attached washer and nut (prepared on site) onto ducts and fresh air inlet. the hanging bolt. Insulation (2) Hook the body onto the hanging bolt. (3) Adjust the dimensions of the ceiling surface from the body. After installing the decorative panel, you can make fi...
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Page 7: Pipe Installation
4.2. Pipe requirement 4. PIPE INSTALLATION CAUTION CAUTION • Refer to the Installation Manual of the outdoor unit for • Be more careful that foreign matter (oil, water, etc.) does description of the length of connecting pipe or for difference not enter the piping than with refrigerant R410A models. -
Page 8: Installing Heat Insulation
(3) When the fl are nut is tightened properly by your hand, hold Dimension A [mm] Pipe outside Dimension B the body side coupling with a separate spanner, then tighten diameter Flare tool for R410A, [mm] with a torque wrench. (See the table below for the fl are nut [mm (in.)] clutch type tightening torques.) -
Page 9: Installing Drain Pipes
WARNING 5. INSTALLING DRAIN PIPES • Do not insert the drain piping into the sewer where sulfurous gas occurs. (Heat exchange erosion may occur) • Install the drain pipe with downward gradient (1/100 to 1/50) and so there are no rises or traps in the pipe. Unsmooth •... -
Page 10: Electrical Wiring
(a)Top view (b)Side view • For wiring, use the prescribed type of cables, connect them VP25 securely, making sure that there are no external forces of the cables applied to the terminal connections. Applying area Improperly connected or secured cables can cause serious of adhesive accidents such as overheating the terminals, electric shock, 35 mm... -
Page 11: Electrical Requirement
6.1. Electrical requirement 6.2. Wiring method (EXAMPLE) Voltage rating 230 V Operating range 198 to 264 V POWER SUPPLY • Select the power cable type and size in accordance with BREAKER OUTDOOR UNIT relevant local and national regulations. TRANSMISSION • Specifi cations for local wiring power cord and branch wiring are POWER SUPPLY in compliance with local code. - Page 12 (6) Please do not fi x 2 power supply cables with 1 screw. WARNING • Use ring terminals and tighten the terminal screws to the specifi ed torques, otherwise, abnormal overheating may be produced and possibly cause heavy damage inside the unit. Tightening torque M4 screw 1.2 to 1.8 N·m...
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Page 13: Connection Of Wiring
6.4. Connection of wiring (1) Remove the control box cover and install each connection cable. Please fi rmly tighten Connection cable and Remote controller cable with the attached cable tie. Wiring connecting port Connection cable clamp 1Wiring cover 2Control box cover Remote controller connecting port Cure the wiring connecting port and remote controller connecting port with... -
Page 14: External Input And External Output (Optional Parts)
(2) Please fi x the Connection cable with cable Clamp. And then DC power supply install the Wire Cover with screws. P.C.B 12 - 24V Load resistance Load resistance Bind securely connected unit Detail (c) *1 Make the power supply DC12 to 24V. Select a power supply capacity with an ample surplus for the connected load. - Page 15 • When function setting is “Forced stop” mode. [In the case of “Edge” input] P.C.B Connector Input signal Command OFF → ON Forced stop Ch1 of CN17 CN6 or CN17 ON → OFF Normal [In the case of “Pulse” input] P.C.B Connector Input signal...
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Page 16: Field Setting
(3) Connection methods 7. FIELD SETTING • Wire modifi cation Use a tool to cut off the terminal on the end of the wire, and There are 3 methods for address setting by FIELD SETTING as then remove the insulation from the cut end of the wire. follows. -
Page 17: Custom Code Setting
Setting Setting Setting Type of switch Setting Type of switch range range Setting Remote Setting Indoor unit 0–63 example controller 0–15 example address address IU AD × 10 IU AD × 1 RC AD Example If 4 indoor units are connected. Refrigerant Setting circuit... -
Page 18: Function Setting
Table B 7.3.1. Button name and function Custom code A (Factory setting) DIP SW SET 3 SW1 DIP SW SET 3 SW2 7.3. Function setting • FUNCTION SETTING can be performed with the wired or wireless remote controller. (The remote controller is optional equipment) •... -
Page 19: Decoration Panel Installation
• Refrigerant address example 9. TEST OPERATION (Example) ADDRESS : 30 1 cycle 12 sec 9.1. Test operation using PCB (Outdoor unit) OPERATION indicator lamp 1.0s 1.0s 1.0s 1.0s 1.0s 1.0s 1.0s (Green) TIMER • Refer to the Installation Manual for the outdoor unit if indicator lamp 0.5s 0.5s 0.5s 0.5s 0.5s 0.5s 9 sec... -
Page 20: Error Codes
11. ERROR CODES If you use a wired type remote controller, error codes will appear on the remote controller display. If you use a wireless remote controller, the lamp on the photodetector unit will output error codes by way of blinking patterns. See the lamp blinking patterns and error codes in the table below.
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