AIR CONDITIONER INSTALLATION MANUAL INDOOR UNIT (Duct type) PART No. 9381386215-02 [Original instructions] For authorized service personnel only. Indicates a potentially or imminently hazardous situation WARNING which, if not avoided, could result in death or serious injury. Indicates a potentially hazardous situation that may result in CAUTION minor or moderate injury or damage to property.
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CAUTION CAUTION 2-Servicing • Read carefully all safety information written in this manual before you install or use the 2-1 Service personnel air conditioner. • Install the product by following local codes and regulations in force at the place of •...
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CAUTION CAUTION 2-8 Checks to electrical devices 8-Removal and evacuation • Repair and maintenance to electrical components shall include initial safety checks • When breaking into the refrigerant circuit to make repairs – or for any other and component inspection procedures. purpose –conventional procedures shall be used.
WARNING CAUTION 12-Recovery • Do not use the existing (for R22) piping and flare nuts. If the existing materials are used, the pressure inside the refrigerant cycle will rise and • When removing refrigerant from a system, either for servicing or decommissioning, it cause failure, injury, etc.
2. 3. Pipe requirement External input and output For installing the External input UTZ-GXNA PCB bracket and output PCB External connect kit UTY-XWZXZG For control output port CAUTION LFNA : 36/45/54 model Air filter kit UTD-LFNA/B/C LFNB : 18/22/24/30 model Refer to the installation manual of the outdoor unit for description of the length of con- LFNC : 12/14 model necting pipe or for difference of its elevation.
3. 2. Installation dimension CAUTION Confirm the directions of the air intake and outlet before installing the unit. Unit: mm 3. 3. 1. Position the ceiling hole 20 or more Hanging bolt installation diagram. Unit: mm (Top side) 150 or 300 or more more 20 or more...
CAUTION CAUTION Fasten the unit securely with special nuts A and B so that the unit does not fall. • Make sure the drain water is properly drained. • To prevent people from touching the parts inside the unit, be sure to install grilles on the inlet and outlet ports.
Hose band (Accessory) Drain hose insulation GOOD • When the pipe is long, install supporters. (Accessory) Outlet Drain hose insulation airflow (Accessory) Supporter Drain pipe Indoor unit Arrange the drain pipe lower than this portion 1.5 to 2 m Drain hose 100 mm Overlap the heat insulation.
3. 6. 1. Pipe connection CAUTION ■ Flaring • Hold the torque wrench at its grip, keeping it in the right angle with the pipe, in order Use special pipe cutter and flare tool designed for R410A or R32 pipework. to tighten the flare nut correctly.
3. 8. 2. Connection cable preparation 3. 8. Electrical wiring ■ Connection cable WARNING Keep the earth (ground) wire longer than the other wires. • Electrical work must be performed in accordance with this Manual by a person certified under the national or regional regulations. Be sure to use a dedicated circuit for the unit.
■ Connection cable 4. OPTIONAL INSTALLATION WORK 4. 1. Optional kit installation WARNING Regulation of cable differs from each locality, refer in accordance with local rules. CN8 (Remote sensor) Control line Power line Outdoor Connection unit cable Earth (ground) ■ Remote controller cable CN48 CN65 CN47...
When function setting is “Forced stop” mode. 4. 3. Remote sensor Input signal Command Remote sensor OFF → ON Forced stop • Remove the existing connector and replace it with the remote sensor connector (ensure that the correct connector is used). ON →...
If 4 indoor units are connected. Example 6. FUNCTION SETTING Indoor unit 1 Indoor unit 2 Indoor unit 3 Indoor unit 4 To change the function settings, refer to the procedures described in the installation RC AD SW RC AD SW RC AD SW RC AD SW manual of the remote controller (wired type).
■ Auto restart ■ Switching functions for external output terminal Enable or disable automatic restart after a power interruption. Functions of the external output terminal can be switched. (♦... Factory setting) (♦... Factory setting) Function Setting Setting Setting Description Function Number Setting Description Number Value...
b. Automatic airflow adjustment 8. 2. Operation method Depending on your installation, choose from the following: CAUTION ■ By the wireless remote controller (with [TEST RUN] button) • This function cannot be used when there is a booster fan between the ducts. •...
11. ERROR CODES Error display Wired remote TIMER ECONOMY Description If you use a wired type remote controller, error codes will appear on the remote control- OPERATION controller lamp lamp ler display. If you use a wireless remote controller, the lamps on the IR receiver unit will lamp (green) Error code (orange)