Specifications:887/887518-rac25nxa1.pdf file (06 Apr 2024)
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Hitachi RAC-25NXA1 Air Conditioner PDF Installation Manual (Updated: Saturday 6th of April 2024 06:18:48 PM)
Rating: 4.5 (rated by 9 users)
Compatible devices: RAS-13EX9G, RAS-D10EX5, RAM-55QH5, RAS-25JX4, RAM-71QH5, RAS-D10CDK, RASM-3VNE, RAS-72CHA3.
Recommended Documentation:
< 3768 : A > — 3 — — 1 — — 2 — — 5 — — 6 — — 4 — — 8 — L(A) N(B) CD L(A) N(B) CD 20mm 100mm 10mm 160mm 20mm 100mm 10mm 160mm OUTDOOR UNIT 330 310 (10)10 500 35 50 12 125 • Carefully read through the procedures of proper installation before starting installation work. • The sales agent should inform customers regarding the correct operation of installation. Tools Needed For Installation Work (Mark is exclusive use tool for R410A) • ª · Screwdriver • Measuring Tape • Knife • Saw • ø65mm Power Drill • Hexagonal Wrench Key ( 4mm) • Wrench (14,17,19, 22mm) Gas leakage Detector • Pipe Cutter • Putty • Vinyl Tape • Pliers • Flare Tool Vacuum Pump Adapter Manifold Valve Charge Hose Vacuum Pump FOR SERVICE PERSONNEL ONLY — 7 — OUTDOOR UNIT RAC-25NXA1 RAC-35NXA1 RAC-50NXA1 HITACHI SPLIT UNIT AIR CONDITIONER INSTALLATION MANUAL SAFETY PRECAUTION • Read the safety precautions carefully before operating the unit. • The contents of this section are vital to ensure safety. Please pay special attention to the following sign. WARNING ............. Incorrect methods of installation may cause death or serious injury. CAUTION ..............Improper installation may result in serious consequence. Make sure to connect earth line. This sign in the fi gures indicates prohibition. Be sure that the unit operates in proper condition after installation. Explain to customer the proper operation and maintenance of the unit as described in the user’s guide. Ask customers to keep this installation manual together with the instruction manual. WARNING • Please request your sales agent or qualifi ed technician to install your unit. Water leakage, short circuit or fi re may occur if you do the installation work yourself. • Please observe the installation stated in the installation manual during the process of installation. Improper installation may cause water leakage, electric shock and fi re. • Make sure that the units are mounted at locations which are able to provide full support to the weight of the units. If not, the units may collapse and impose danger. • Observe the rules and regulations of the electrical installation and the methods described in the installation manual when dealing with the electrical work. Use cables which are approved offi cial in your country. Be sure to use the specifi ed circuit. A short circuit and fi re may occur due to the use of low quality wire or improper work. • Be sure to use the specifi ed cables for connecting the indoor and outdoor units. Please ensure that the connections are tight after the conductors of the wire are inserted into the terminals to prevent the external force is being applied to the connection section of the terminal base. Improper insertion and loose contact may cause over-heating and fi re. • Please use the specifi ed components for installation work. Otherwise, the unit may collapse or water leakage, electric shock, fi re or stronger vibration may occur. • Be sure to use the specifi ed piping set for R410A. Otherwise, this may result in broken copper pipes or faults. • When installing or transferring an air conditioner to another location, make sure that air other than the specifi ed refrigerant (R410A) does not enter the refrigeration cycle. If other air should enter, the pressure level of the refrigeration cycle may increase abnormally which could result in a rupture and injury. • Be sure to ventilate fully if a refrigerant gas leak while at work. If the refrigerant gas comes into contact with fi re, a poisonous gas may occur. • After completion of installation work, check to make sure that there is no refrigeration gas leakage. If the refrigerant gas leaks into the room, coming into contact with fi re in the fan-driven heater, space heater, etc., a poisonous gas may occur. • Unauthorized modifi cations to the air conditioner may be dangerous. If a breakdown occurs please call a qualifi ed air conditioner technician or electrician. Improper repairs may result in water leakage, electric shock and fi re, etc. • Be sure to connect the earth line from the power supply wire to the outdoor unit and between the outdoor and indoor unit. Do not connect the earth line to the gas tube, water pipe, lighting rod or the earth line of the telephone unit. Improper earthing may cause electric shocks. • When fi nishing the refrigerant collection (pumping down), stop the compressor and then remove the coolant pipe. If you remove the refrigerant pipe while the compressor is operating and the service valve is released, air is sucked and a pressure in the freezing cycle system will build up steeply, causing an explosion or injury. • When installing the unit, be sure to install the refrigerant pipe before starting the compressor. If the refrigerant pipe is not installed and the compressor is operated with the service valve released, air is sucked and the pressure level of the refrigeration cycle may increase abnormally which could result in a rupture and injury. CAUTION • A circuit breaker must be installed in the house distribution box for the direct connected power supply cables to the outdoor unit. In case of other installations a main switch with a contact gap or more than 3mm has to be installed. Without a circuit breaker, the danger of electric shock exists. • Do not install the unit near a location where there is fl ammable gas. The outdoor unit may catch fi re if fl ammable gas leaks around it. • Please ensure smooth fl ow of water when installing the drain hose. Improper installing may wet your furniture. • An IEC approved power cord should be used. Power cord type: NYM. Names of Components THE CHOICE OF MOUNTING SITE (Please note the following matters and obtain permission from customer before installation.) No. Item Qty 1 Bush 1 (RAC-50NXA1) 2 Drain Pipe 2 1 OUTDOOR UNIT WARNING • The outdoor unit must be mounted at a location which can support heavy weight. Otherwise, noise and vibration will increase. CAUTION • Do not expose the unit under direct sunshine or rain. Besides, ventilation must be good and clear of obstruction. • The air blown out of the unit should not point directly to animals or plants. • The clearances of the unit from top, left, right and front are specifi ed in fi gure below. At least two of the above sides must be open air . • Be sure that the hot air blown out of the unit and noise do not disturb the neighbourhood. • Do not install at a location where there is fl ammable gas, steam, oil and smoke. • The location must be convenient for water drainage. • Place the outdoor unit and its connecting cord at least 1m away from the antenna or signal line of television, radio or telephone. This is to avoid noise interference. Condensed water disposal of outdoor unit • There is holes on the base of outdoor unit for condensed water to exhaust. • In order to fl ow condensed water to the drain, the unit is installed on a stand or a block so that the unit is 100mm above the ground as shown fi gure. Join the drain pipe to one hole. • Cover the drain hole with a bush. To install the bush, put it on the drain hole as shown in the fi gure and press the both sides of the bush to fi t into the hole. After installation, check whether the drain pipe and bush cling to the base fi rmly. • Please mount the outdoor unit on stable ground to prevent vibration and increase of noise level. • Decide the location for piping after sorting out the different types of pipe available. • When removing side cover, please pull the handle after undoing the hook by pulling it downward. Reinstall the side cover in reverse order of the removal. Pull downward Please face this side (suction side) of the unit to the wall. Please remove side cover when connecting the piping and connecting cord. • Install the outdoor unit horizontally and make sure that condensate drains away. • In case of using in cold weather area Especially when there are heavy snows in cold weather area, condensed water freezes on the base and may not drain. In this case, please remove the bush and the drain pipe at the bottom of the unit (left and centre near discharge portion of air, each 1 place) to restore smooth drainage. Ensure that the distance from the drain hole to the ground is 250mm or more. RAC-25NXA1 / RAC-35NXA1 RAC-50NXA1 RAC-50NXA1 • Do not touch the suction port, bottom surface, or aluminium fi n of the outdoor unit. • Failure to do so may cause an injury. CAUTION Above 100mm Base Outer diameter: 16mm Drain hole Drain pipe Bush Above 100mm Base Outer diameter: 16mm Drain hole Drain pipe Bush Cover AIR REMOVAL INSTALLATION OF REFRIGERATING PIPES AND AIR REMOVAL Procedures of using vacuum pump for air removal A 1. Preparation of pipe • Use a pipe cutter to cut the copper pipe and remove burr. Die Copper pipe Die Trimming tool Copper pipe 2. Pipe connection Flare nut Wrench Torque wrench Remove the cap of valve core. Then, connect the charge hose. Remove the cap of valve head. Connect the vacuum pump adapter to the vacuum pump and connect the charge hose to the adapter. Fully tighter the “Hi” shuttle of the manifold valve and completely unscrew the “Lo” shuttle. Run the vacuum pump for about 10-15 minutes, then completely tighten the “Lo” shuttle and switch off the vacuum pump. • Loosen the spindle of the service valve with small diameter by 1/4 turn and tighten the spindle immediately after 5 to 6 seconds. • Remove the charging hose from the service valve. Completely unscrew the spindle of the service valve (at 2 places) in anticlockwise direction to allow the fl ow of refrigerant (using Hexagonal Wrench key). Tighten the cap of valve head. Check the cap’s periphery if there is any gas leakage. The task is then completed. 1 2 3 4 Please use gas leakage detector to check if leakage occurs at connection of Flare nut as shown on the right. If gas leakage occurs, further tighten the connection to stop leakage. Cap of valve core Cap of valve head Hexagonal wrench key 3. Remove of air from the pipe and gas leakage inspection Gas leakage inspection Outer diameter Torque N·m of pipe (ø) (kgf·cm) Small diameter side 6.35 (1/4”) 13.7 – 18.6 (140 – 190) Large diameter side 9.52 (3/8”) 34.3 – 44.1 (350 – 450) 12.7 (1/2”) 44.1 – 53.9 (450 – 550) Small diameter side 6.35 (1/4”) 19.6 – 24.5 (200 – 250) Valve head cap Large diameter side 9.52 (3/8”) 19.6 – 24.5 (200 – 250) 12.7 (1/2”) 29.4 – 34.3 (300 – 350) Valve core cap 12.3 – 15.7 (125 – 160) • Before fl aring, please put on the fl are nut. • Please use exclusive tool for refrigerant R410A. Outer diameter (ø) A (mm) Rigid Flaring Tool For R410A tool For R22 tool 6.35 (1/4”) 0 – 0.5 1.0 9.52 (3/8”) 0 – 0.5 1.0 12.7 (1/2”) 0 – 0.5 1.0 • Please be careful when bending the copper pipe. • Screw in manually while adjusting the center. After that, use a torque wrench to tighten the connection. CONNECTION OF POWER CORD Procedures of wiring Connecting cord Outdoor unitIndoor unit AC 220–240V 1ø 50Hz WARNING THIS APPLIANCE MUST BE EARTHED. WARNING • The naked part of the wire core should be 10mm fi x it to the terminal tightly. Then try to pull the individual wire to check if the contact is tight. Improper insertion may burn the terminal. • Be sure to use only wire specifi ed for the use of air-conditioner. • Please refer to the manual for wire connection and the wiring technique should meet the standard of the electrical installation. • Leave some space in the connecting cord for maintenance purpose and be sure to secure it with the cord band. • Secure the connecting cord along the coated part of the wire using the cord band. Do not exert pressure on the wire as this may cause overheating or fi re. Wiring of the outdoor unit Please remove the side cover for wire connection. WARNING • If you cannot attach the side plate due to the connection cord, please press the connecting cord in the direction to the front panel to fi x it. • Be sure that the hooks of the side cover fi xed in certainly. Otherwise water leakage may occur and this causes short circuit or faults. • The connecting cord should not touch to service valve and pipes. (It becomes high temperature in heating operation.) • Investigate the power supply capacity and other electrical conditions at the installing location. • Depending on the model of room air conditioner to be installed, request the customer to make arrangements for the necessary electrical work etc. • The electrical work includes the wiring work up the outdoor unit. In localities where electrical conditions are poor, use of a voltage regulation is recommended. • Install outdoor for the room air conditioner within the reaching range of the line cord. IMPORTANT Checking for the electric source and the voltage range • Before installation, the power source must be checked and necessary wiring work must be completed. To make the wiring capacity proper, use the wire gauge list below for the wiring from house distribution fuse box to the outdoor unit in consideration of the blocked rotor current. IMPORTANT When putting two connecting cords through the band. Screw Connecting cord Insulating plate Cord band Earth terminal RAC-25NXA1 / RAC-35NXA1 / RAC-50NXA1 When the meter reaches -101KPa (-76cmHg) during pumping fully tighten the shuttle. Meter showing pressure Closed R410A Manifold valve Vacuum pump Vacuum pump adapter Val ve Charge hose Val ve When pumping starts, slightly loosen the fl are nut to check of air sucked in. Then tighten the fl are nut. Cap of valve head The body of service valve Detail of cutting the connecting cord • Outdoor unit RAC-25NXA1/RAC-35NXA1 RAC-50NXA1 Cover Earth terminal Dimensions of Mounting Stand of the Outdoor Unit Mounting Stand • Remove burr and jagged edge will cause leakage. • Point the side to be trimmed downwards during trimming to prevent copper chips from entering the pipe. CAUTION • In case of removing fl are nut of a indoor unit, fi rst remove a nut of small diameter side, or a seal cap of big diameter side will fl y out. Free from water into the piping when working. • Be sure to tighten the fl are nut to the specfi ed torque with a torque wrench. If the fl are nut is overtightened, the nut may be split after a long period has passed, and may cause a refrigerant leak. CAUTION Fuse Capacity 16A time delay fuse (unit : mm) RAC-25NXA1/RAC-35NXA1 RAC-50NXA1 above 200mm * A above 100mm above 200mm ( ) above 50 mm when installed on the ceiling of balcony * B (This fi gure is RAC-50NXA1) • The refrigerating machine oil is easily affected by moisture. Use caution to prevent water from entering the cycle. • The difference in height between the indoor and outdoor unit should be kept below 10m. • The connecting pipe, no matter big or small, should all be insulated with insulation pipe and then wrapped with vinyl tape. (The insulator will deteriorate if it is not wrapped with tape.) Inner diameter ø16mm The connection of insulated drain hose. Please use insulated drain hose for the indoor piping (commer cial product). Maximum pipe length 20m C, D L, N Green + Yellow Green + Yellow Strip wires RAC-25NXA1 / RAC-35NXA1 / RAC-50NXA1 For outdoor unit installation, allow at least 2 sides of space around the unit to ensure ventilation fl ue. RAC-25NXA1 RAC-35NXA1 RAC-50NXA1 A B above 300mm above 50mm above 300mm above 50mm above 200mm above 50mm * give clearance as wide as possible FINAL STAGE OF INSTALLATION 1. Operation test • Please ensure that the air conditioner is in normal operating condition during the operation test. • Explain to your customer the proper operation procedures as described in the user’s manual. • If the indoor unit does not operate, check to see that the connections are correct. • Turn on the lamp in the room where the indoor unit is installed and check the remote controller for normal operation. Insulation and maintenance of pipe connection • The connected terminals should be completed sealed with heat insulator and then tied up with rubber strap. • Please tie the pipe and power line together with vinyl tape as shown in the fi gure showing the installation of Indoor and outdoor units. Then fi x their position with holders. • To enhance the heat insulation and to prevent water condensation, please cover the outdoor part of the drain hose and pipe with insulation pipe. • Completely seal any gap with putty. Force-cooling operation • When the service switch of the outdoor unit is pressed for 1 or more seconds, the force-cooling operation starts. Use this mode when performing the failure diagnosis or collecting refrigerant into the outdoor unit. Sleeve of protection pipe Putty Putty OUTSIDE INSIDE Screw Cover Service switch (If the switch is pressed for more than 1 second, the force- cooling operation starts. If the switch is pressed for additional more than 1 second, the operation stops.) RAC-25NXA1 / RAC-35NXA1 RAC-50NXA1 CAUTION Do not operate the unit for more than 5 minutes while the spindle of the service valve is closed. Wire length Wire gauge up to 6m 1.5mm 2 up to 15m 2.5mm 2 up to 20m 4.0mm 2 up to 6m 1.5mm 2 up to 20m 2.5mm 2 L, N C, D 1_RAC-25_35_50NX2_Inst_Out_EN.indd 11_RAC-25_35_50 _Inst_Out_EN.indd 1 5/13/10 4:43:41 PM5/13/10 4:43:41 PM Please face this side (suction side) of the unit to the wall. Please remove side cover when connecting the piping and connecting cord. Pull downward RAC-25NXA1/RAC-35NXA1 (RAC-25NXA1/RAC- 35NXA1) 12 320 299 500 792 340 Screw Cover Service switch (If the switch is pressed for more than 1 second, the force- cooling operation starts. If the switch is pressed for additional more than 1 second, the operation stops.) NXA1
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