Panasonic S-1821PU Inverter NX Series Way Cassette Instruction Manual

Panasonic S-1821PU Inverter NX Series Way Cassette

Product Information

• Specifications
  • Model No.: S-1821PU, S-2430PU, S-3448PU
  • Refrigerant: R32
• Installation Instructions
  Required tools for Installation Works

1. Phillips screwdriver
2. Flathead screwdriver
3. Level gauge
4. Electric drill, hole core
5. Hexagonal wrench (4 mm)
6. Spanner
7. Pipe cutter
8. Reamer
9. Knife
10. Gas leak detector
11. Measuring tape
12. Thermometer
13. Megohmmeter
14. Multimeter
15. Vacuum pump
16. Gauge manifold

• Symbols on the Unit
  • This Air Conditioner contains and operates with refrigerant R32.
  • This symbol shows that this equipment uses a flammable refrigerant. If the refrigerant is leaked, together with an external ignition source, there is a possibility of ignition.
  • This symbol shows that the Installation Manual should be read carefully.
  • This symbol shows that a service personnel should be handling this equipment with reference to the Installation Manual.
  • This symbol shows that there is information included in the Operation Manual and/or Installation Manual.

Product Usage Instructions

• Safety Precautions
  • Incorrect installation due to ignoring of the instruction will cause harm or damage, and the seriousness is classified by the following indications:
  • WARNING: This indication shows the possibility of causing death or serious injury.
  • CAUTION: This indication shows the possibility of causing injury or damage to properties only.
• Important Notes
  • Please remind the customer to keep the operating instructions for future reference.
• General Safety Precautions
  • Do not use means to accelerate the defrosting process or to clean, other than those recommended by the manufacturer. Any unfit method or use of incompatible material may cause product damage, burst, and serious injury.
  • Do not install an outdoor unit near the handrail of the veranda. When installing air-conditioner unit on the veranda of a high-rise building, a child may climb up to the outdoor unit and cross over the handrail causing an accident.
  • Do not use an unspecified cord, modified cord, joint cord, or extension cord for the power supply cord. Do not share the single outlet with other electrical appliances. Poor contact, poor insulation, or overcurrent will cause electrical shock or fire.
  • Do not tie up the power supply cord into a bundle by band. An abnormal temperature rise on the power supply cord may happen.
  • Do not insert your fingers or other objects into the unit, the high-speed rotating fan may cause injury.
  • Do not sit or step on the unit, you may fall down accidentally.
  • Keep plastic bags (packaging material) away from small children, they may cling to the nose and mouth and prevent breathing.
  • When installing or relocating an air conditioner, do not let any substance other than the specified refrigerant, e.g. air, etc., mix into the refrigeration cycle (piping).
  • Mixing of air, etc., will cause abnormally high pressure in the refrigeration cycle and result in explosion, injury, etc.
  • Do not pierce or burn as the appliance is pressurized. Do not expose the appliance to heat, flame, sparks, or other sources of ignition. Else, it may explode and cause injury or death.
• FAQ
  • Q: What refrigerant does this product use?
  • A: This product uses refrigerant R32.
  • Q: Can I use an extension cord for the power supply?
  • A: No, it is recommended not to use an extension cord for the power supply. Please refer to the installation instructions for more details.
  • Q: Can I clean the unit with any cleaning method?
  • A: No, it is important to only use the cleaning methods recommended by the manufacturer to avoid product damage and potential injury. Please refer to the user manual for the recommended cleaning procedures.

Installation Instruction

CAUTION: R32 REFRIGERANT

• This Air Conditioner contains and operates with refrigerant R32.
• THIS PRODUCT MUST ONLY BE INSTALLED OR SERVICED BY QUALIFIED PERSONNEL.
• Refer to National, State, Territory and local legislation, regulations, codes, installation & operation manuals, before the installation, maintenance and/or service of this product.

Required Tools for Installation Works

1. Phillips screwdriver
2. Flathead screwdriver
3. Level gauge
4. Electric drill, hole core drill (ø70 mm)
5. Hexagonal wrench (4 mm)
6. Spanner
7. Pipe cutter
8. Reamer
9. Knife
10. Gas leak detector
11. Measuring tape
12. Thermometer
13. Megohmmeter
14. Multimeter
15. Torque wrench
16. N•m (1.8 kgf•m)
17. N•m (4.3 kgf•m)
18. N•m (5.6 kgf•m)
19. N•m (6.6 kgf•m)
20. Vacuum pump
21. Gauge manifold

Explanation of symbols displayed on the indoor unit or outdoor unit.

SAFETY PRECAUTIONS

• Read the following “SAFETY PRECAUTIONS” carefully before installation.
• Electrical work must be installed by a licensed electrician. Be sure to use the correct rating of the power plug and main circuit for the model to be installed.
• The caution items stated here must be followed because these important contents are related to safety. The meaning of each indication used is as below.
• Incorrect installation due to ignoring of the instruction will cause harm or damage, and the seriousness is classified by the following indications.

The items to be followed are classified by the symbols:

• Carry out test running to confirm that no abnormality occurs after the installation.
• Then, explain to the user the operation, care and maintenance as stated in the instructions.
• Please remind the customer to keep the operating instructions for future reference.

PRECAUTION FOR USING R32 REFRIGERANT

The basic installation work procedures are the same as conventional refrigerant (R410A, R22) models. However, pay careful attention to the following points:

Check of Density Limit

• The refrigerant (R32), which is used in the air conditioner, is a flammable refrigerant.
• So the requirements for installation space of the appliance are determined according to the refrigerant charge amount [mc] used in the appliance.
• Regarding the refrigerant charge amount [mc] used in the appliance, refer to the installation instructions for the outdoor unit.
• The minimum indoor floor space compared with the amount of refrigerant is roughly as follows:

ACCESSORIES PACKED

ACCESSORIES PACKED IN THE INDOOR UNIT CONTAINER

SELECTING THE LOCATION FOR THE INDOOR UNIT

Provide a check port on the piping side ceiling for repair and maintenance. Install the indoor unit once the following conditions are satisfied and after receiving the customer’s approval.

1. The indoor unit must be within a maintenance space.
2. The indoor unit must be free from any obstacles in the path of the air inlet and outlet and must allow the spread of air throughout the room.
3. If the height from the floor to the ceiling exceeds three meters, air flow distribution deteriorates and the effect is decreased.

WARNING

1. The installation position must be able to support a load four times the indoor unit weight.
2. The indoor unit must be away from heat and sources of steam, but avoid installation near an entrance.
3. The indoor unit must allow easy draining.
4. The indoor unit must allow easy connection to the outdoor unit.
5. Place the indoor unit according to the height from the ceiling shown in the illustration below.
6. The indoor unit must be at least 3 m away from any noise-generating equipment. The electrical wiring must be shielded with a steel conduit.
7. If the power supply is subject to noise generation, add a suppressor.
8. Do not install the indoor unit in a laundry. Electric shocks may result.
9. Installation height for indoor units shall be at least 2.2 m.

Note: Thoroughly study the following installation locations

1. In such places as restaurants and kitchens, a considerable amount of oil steam, and flour adhere to the turbofan, the fin of the heat exchanger, and the drain pump, resulting in heat exchange reduction, spraying, dispersing of water drops, drain pump malfunction, etc.
   In these cases, take the following actions:

   • Make sure that the ventilation fan for the smoke-collecting hood on a cooking table has sufficient capacity so that it draws oily steam which should not flow into the suction of the air conditioner.
   • Make sure there is enough distance from the cooking room to install the air conditioner in such a place that it may not suck in oily steam.

2. Avoid installing the air conditioner in such circumstances where cutting oil mist or iron powder exists, especially in factories, etc.

3. Avoid places where inflammable gas is generated, flows in, contaminated, or leaked.

4. Avoid places where sulfurous acid gas or corrosive gas can be generated.

5. Avoid places near high-frequency generators.

INSTALLATION OF INDOOR UNIT

This air conditioner uses a drain-up motor. Horizontally install the unit using a level gauge

CEILING OPENING DIMENSIONS AND HANGING BOLT LOCATION

• The paper model for installation expands or shrinks according to temperature and humidity.
• Check on the dimensions before using it.

CAUTION: During the installation, care must be taken not to damage electric wires.

• The dimensions of the paper model for installation are the same as those of the ceiling opening dimensions.
• Be sure to discuss the ceiling drilling work with the workers concerned.

HANGING POSITION OF THE AIR CONDITIONER BODY

• Air conditioner body gap setting between the ceiling surface should be 12mm ~ 17mm as below figure.
• (Adjustment of height direction should be done after fi xing decorative panel.)

POSITION OF AIR CONDITIONER BODY AND CEILING SURFACE

WARNING: Tighten the nut and bolt to prevent the unit from falling.

REFRIGERANT PIPING

CONNECTING THE PIPING TO INDOOR

1. Brazing for piping.
   • a. Execute brazing before tightening the flare nut.
   • b. Brazing must be executed while blowing nitrogen gas. (This prevents the generation of oxidized scale in copper pipe.)
2. When there are a lot of brazings for long piping, install a strainer midway through the piping. (The strainer is fully supplied.)
3. Use a clean copper pipe with an inner wall surface free from mist and dust. Blow nitrogen gas or air to blow off dust in the pipe before connection.
4. Form the piping according to its routing. Avoid bending and bending back to the same piping point more than three times. (This will result in hardening of the pipe).
5. After deforming the pipe, align the centres of the union fitting of the indoor unit and the piping, and tighten them firmly with wrenches.
6. Connect the pipe to the service valve or ball valve which is located below the outdoor unit.
7. After completing the piping connection, be sure to check if there is gas leakage in the indoor and outdoor connections.
8. The refrigerant is charged to the outdoor unit. For details, see the manual for the installation work of the outdoor unit. (Additional charging, etc.)
9. Confi rm the union (thin side) is always in the lower direction after connecting piping.
   • CAUTION: Use two wrenches and tighten with regular torque.

VACUUM DRYING

• After completing the piping connection, execute vacuum drying for the connecting piping and the indoor unit.
• The vacuum drying must be carried out by using the service ports of both the liquid and gas side valves.

Flare nut fastening torque N•m (kgf•cm)

ø6.35 mm| 18 (180)| ø12.7 mm| 55 (560)
ø9.52 mm| 42 (430)| ø15.88 mm| 65 (660)

INDOOR UNIT DRAIN PIPING

• During Drain Set Piping, install as shown in the figure below.
• Drain piping must have a down-slope (1/50 to 1/100); be sure not to provide an up-and-down slope to prevent reversal flow.
• During the drain piping connection, be careful not to exert extra force on the drain port at the indoor unit.
• The outside diameter of the drain connection at the indoor unit is 32 mm.
• Piping material: Polyvinyl chloride pipe VP-25 and pipe fitting.
• Be sure to perform heat insulation on the drain piping. (Refer to 5 HEAT INSULATION section heat insulators for drain piping & drain pipe installation).

BEFORE PERFORMING THE INSTALLATION OF DRAIN PIPING

1. Limitations of Raising the Drain Pipe Connection
   • The drain pipe can be raised to a maximum height of 850 mm from the bottom of the ceiling.
   • Do not attempt to raise it higher than 850 mm.
2. Limitations of Drain Pipe Connection
   • Do not install the drain pipe with an upward gradient from the drain port connection. This will cause the drain water to flow backward and leak when the unit is not operating.
   • Do not install an air bleeder as this may cause water to spray from the drain pipe outlet.
   • Do not provide a U-trap or bell-shaped trap in the middle of the drain pipe. Doing so will cause abnormal sounds.
   • Make sure the drain pipe has a downward gradient (1/100 or more; downward from the drain port connection)
   • Do not bend downwards on less than 0°
   • Trap prohibited. Doing so will cause abnormal sound

DRAIN TEST
The air conditioner uses a drain-up motor to drain water. Use the following procedure to test the drain-up motor operation.

• Connect the main drain pipe to the exterior and leave it provisionally until the test comes to an end.
• Feed water to the flexible drain hose and check the piping for leakage.
• Be sure to check the drain-up motor for normal operating and noise when the electric wiring is complete.
• When the test is complete, connect the flexible drain hose to the drain port.

HEAT INSULATION

CAUTION: Be sure to perform heat insulation on the drain, liquid, and gas piping. Imperfection in heat insulation work leads to water leakage

HEAT INSULATORS FOR REFRIGERANT TUBES

1. Selection of heat insulation materials for the refrigerant tube. When using the heat insulation materials (field supply), kindly Check for their sizes and performance.
   • Material for insulation material: Polyethylene foam.
   • Heat transfer rate: less than 0.051 W/m.K.
   • Material withstands temperature: up to 110˚C Max.
   • Must be easy to use, age-resistant, and not easily absorb moisture.
   • Be sure to match the below insulation material size with tube sizes.

Piping size, mm (In)| Thermal insulation size (I.D.)| Thermal insulation Thickness
---|---|---
6.35 (1/4″)| 8 ~ 10 mm| Insulation thickness must be 10 mm or greater
9.52 (3/8″)| 12 ~ 15 mm
12.70 (1/2″)| 14 ~ 16 mm
15.88 (5/8″)| 16 ~ 20 mm

1. Taping the fl are nuts
   • Wind the white insulating tape around the flare nuts at the gas tube connections.
   • Cover up the tube connection with the tube insulator (field supply).
2. Taping the tubes
   • Refrigerant tubes (and electrical wiring if local permits) should be taped together with armouring tape in 1 bundle. Keep the drain hose separate from the refrigerant tube to prevent condensation.
   • Wrap the armouring tape from the bottom of the outdoor unit to the tubing where it enters the wall. Overlap half of each previous turn.
   • Clamp the tubing to the wall, using 1 clamp approx. per each meter apart

PRECAUTIONS IN HIGH HUMIDITY CIRCUMSTANCES

This air-conditioner has been tested according to the “JIS Standard Conditions with Mist” and has been confirmed that there are no faults. However, if it is operated for a long time in a highly humid atmosphere (dew point temperature: more than 23˚C), water drops are liable to fall. In this case, add heat insulation material according to the following procedures:

• Heat insulation material to be prepared. Adiabatic glass wool with a thickness 10 to 20 mm.
• Stick the wool on all air-conditioners that are located in the ceiling atmosphere.
• In addition to the normal heat insulation (thickness: more than 10 mm) refrigerant piping (gas piping: thick piping) and drain piping, add a further of 10 mm to 30 mm thickness material.

HEAT INSULATORS FOR DRAIN PIPING & DRAIN PIPE INSTALLATION

1. Selection of heat insulation materials for drain piping and drain pipe. When using the heat insulation materials (Field Supply). Kindly use the same size and performance as refrigerant tubes. Check for its sizes as below table:

thickness must be 10mm or greater

• After checking the drainage, fully wrap it with a drain insulator (Field Supply) around the drain hose

WALL SEAL

• When the outdoor unit is installed in a higher position than the indoor unit, install the trap so as not to instil rainwater into the wall by transmitting in piping.
• Stuff the space among piping, the electric wire, and the drain hose with “Putty” and seal the penetration wall hole. Make sure that rainwater does not instil into the wall.
• Put the incision at the trap part of the heat insulator (for water drainage)
• As to the main power source and cable size of the outdoor unit, read the installation manual attached to the outdoor unit.

1. Select a power source that is capable of supplying the current required by the air conditioner.
2. Feed the power source to the unit via a distribution switchboard designed for this purpose, the switch should disconnect all poles with a contact separation of at least 3 mm.
3. Always ground the air conditioner with a grounding wire and screw to meet the LOCAL REGULATIONS.
4. Be sure to connect the indoor/outdoor unit connection wires correctly to the terminal board.
5. Be sure to turn off the main power before installing and connecting the remote controller.

Note

• If momentarily turning on the power supply for both the indoor and outdoor units, do not turn the power off after at least 1 minute has passed. (For the system’s automatic setting.)
• Turning off the power supply on the way may cause an abnormal operation.

Note

• For Optional Parts connecting wiring size, refer to the Installation Manual of the Optional Parts.

CONNECTING THE WIRES TO THE CONTROL BOX

• Remove the 2 pcs of mounting screws, remove the control box cover and then connect the wires by following the procedure given in the illustration.

CAUTION: Make sure that screws of the terminal are securely tightened

Indoor Unit Wiring

CAUTION:

• When linking the outdoor units in a network, it is necessary to install the terminating resistance.
• The installation method of the terminating resistance is different according to the connecting procedure of the interunit control wiring in the link.
• Set the terminating resistance on the indoor unit control PCB.
• The setting of the terminating resistance at shipment is OPEN side (inoperative).
• If the shorting socket is replaced as shown below, the terminating resistance is SHORT side (operative).
• Change the setting of the terminating resistance at the nearest indoor unit and farthest indoor unit from the integrated control system to SHORT side (operative).
• The setting of 3 or more terminating resistances to SHORT side (operative) is prohibited.
• If branching in the inter-unit control wiring, the number of branch points should be 16 or fewer

WIRE STRIPPING AND CONNECTING REQUIREMENT

This equipment must be properly earthed.
Note:

• Isolating Devices (Disconnecting means) should have a minimum 3.0 mm contact gap.
• Earth wire shall be Yellow/Green (Y/G) in colour and longer than other AC wires for safety reasons.
• Earth lead wire shall be longer than other lead wires as shown in the figure for electrical safety in case of the cord slipping out of anchorage.

INSTALLATION OF DECORATIVE PANEL

• Before installing the decorative panel, always remove the paper template.

The decorative panel has its installation direction. Confirm the direction by displaying the piping side.

1. Removing the air intake grille
2. Remove the 2 screws on the latch of the air intake grille. (Reattach the air intake grille after installation of the panel for the cassette.)
3. Slide the air intake grille in the direction shown by arrow 1 to open the grille.
4. Remove the corner cover in 4 corner places. Pull the hook of the corner cover in direction 1, then remove it by sliding out in direction 2.
5. Hang the temporary latches on the inside of the panel for the cassette to the receptacle on the unit to temporarily attach the panel for the cassette in place.
   • When removing the panel for the cassette, push the temporary latches outward while holding the panel for the cassette.
6. Adjust between decorative panel fi xing hole and indoor unit screw hole.
7. Fix decorative panel with 4 screws with already fixed at the paper model for installation.
   • CAUTION: Install the decorative panel securely. Cool air cause dew to happen. Water drops fall.
8. Adhere the cosmetic panel and ceiling wall together and confirm no gap in between. Readjust indoor unit height, if there is a gap between the ceiling wall and decorative panel although it has been fi xed by a screw. If there is no effect on the indoor unit level and drain piping etc., the adjustment of indoor unit height can be adjusted through the corner cover hole. Tighten the fixing nut of the indoor unit back firmly after the adjustment has been made.
9. Open the indoor control box cover by removing 2 pcs of mounting screws.
10. Insert the wiring panel connector firmly to indoor PCB CN011 LM. Be cautious not to clamp the cord in between the control board and the control board cover.
11. After completion, install the parts removed by following the reverse procedure.
    • WARNING: Be sure to hook the air inlet grill string, to prevent the grill from falling and causing injury to it

Refer to the Wireless Remote Controller Installation Manual for the details of wireless remote controller settings and Receptor Unit Installation.

HOW TO ATTACH THE CORNER COVER

1. Check that the safety cord from the corner cover is fastened to the panel for the cassette pin, as shown in the figure below.
2. Use the supplied screws to attach the corner cover to the panel for the cassette.

TEST RUN

Precautions

• Request that the customer be present when the test run is performed.
• At this time, explain the operation 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, the indoor unit control PCB fuse will blow in order to protect the PCB. In this case, make the wiring correctly.
• Then disconnect the 2P connectors (OC) that are connected to the indoor unit control PCB, and replace them with 2P connectors (EMG).
• If the operation is still not possible after changing the brown connectors, cut the jumper on the indoor unit control PCB. (Be sure to turn the power OFF before performing this work.)

Note

• For new products first time power on after installation, the system requires approximately 5 minutes for the “System Auto Configuration Process”.
• The system does not turn on or respond to the remote controller immediately after powering on.

Test Run Procedure

1. Items to Check Before the Test Run
   • Turn the wired remote power switch ON at least 5 hours in advance in order to energize.
   • Fully open the closed valves on the liquid tubing and gas tubing sides.
   • Check the wiring of indoor and outdoor units.
2. Check the Wiring of Indoor & Outdoor Units
   • Separate the power supply and connection cable between the outdoor and indoor unit
3. Address Setting
   • Note
   • The displays of the earth, outdoor unit power supply wiring and earth leakage circuit breaker are omitted.
   • System connection
   • When turning on all indoor and outdoor units, the auto address will start. It takes a maximum of 10 minutes.
   • When the auto address setting is completed, wait at least 1 minute and 30 seconds. Then start the operation.
4. Checking the Indoor Unit Addresses
   • Use the wired remote controller to check the indoor unit address.
   • CZ-RTC5B (High-spec wired remote controller)
   • Optional Parts
   • CZ-RTC4 (Timer remote controller) Optional Parts
   • CZ-RTC6 (Wired remote controller) Optional Parts
5. Test Run Using the Remote Controller
   • CZ-RTC5B (High-spec wired remote controller) Optional Parts
   • This mode places a heavy load on the machines. Therefore use it only when performing the test run.
   • Note
   • The outdoor units will not operate for approximately 3 minutes after the power is turned ON and after the operation is stopped.
   • CZ-RTC4 (Timer remote controller) Optional Parts
   • This mode places a heavy load on the machines. Therefore use it only when performing the test run.
   • Note
   • The outdoor units will not operate for approximately 3 minutes after the power is turned ON and after operation is stopped.
   • CZ-RTC6 series (Wired Remote Controller) Optional Parts
   • This mode places a heavy load on the machines. Therefore use it only when performing the test run.
   • Note
   • The outdoor units will not operate for approximately 3 minutes after the power is turned ON and after the operation is stopped.

CARE AND CLEANING

WARNING:

• For safety, be sure to turn the air conditioner off and also to disconnect the power before cleaning.
• Do not pour water on the indoor unit to clean it. This will damage the internal components and cause an electric shock hazard.

Air intake and outlet side (Indoor unit)

• Clean the air intake and outlet side of the indoor unit with a vacuum cleaner brush, or wipe them with a clean, soft cloth.
• If these parts are stained, use a clean cloth moistened with water. When cleaning the air outlet side, be careful not to force the vanes out of place.

CAUTION:

• Never use solvents or harsh chemicals when cleaning the indoor unit. Do not wipe plastic parts using very hot water.
• Some metal edges and the fins are sharp and may cause injury if handled improperly; be especially careful when you clean these parts.
• The internal coil and other components of the outdoor unit must be cleaned regularly. Consult your dealer or service centre.

Air filter

• The air filter collects dust and other particles from the air and should be cleaned at regular intervals or when the filter indication ( ) on the display of the remote controller (wired type) shows that the filter needs cleaning.
• If the filter gets blocked, the efficiency of the air conditioner drops greatly
  • Period 6 months

After Cleaning

1. After the air filter is cleaned, reinstall it in its original position. Be sure to reinstall in reverse order.
2. [In the case of the Timer Remote Controller] Press the Filter reset button. The (Filter) indicator on the display goes out.

Note

• The frequency with which the filter should be cleaned depends on the environment in which the unit is used.
• Clean the filter frequently for best performance in the area of dusty or oil spots regardless of filter status.

How to clean the filter

1. Remove the air filter from the air intake grille.
2. Use a vacuum cleaner to remove light dust. If there is sticky dust on the filter, wash the filter in lukewarm, soapy water, rinse it in clean water, and dry it.

How to remove the filter

1. Use a screwdriver to remove the bolt screw on each side of the two latches. (Be sure to reattach the two bolt screws after cleaning.)
2. Slide the latches of the air intake grille in the direction of the inside to open the grille.
3. The air intake grille opens downward.

CAUTION:

• When cleaning the air filter, never remove the safety strap. If it is necessary to remove it for servicing and maintenance inside, be sure to reinstall the safety strap securely (hook on the grille side) after the work.
• When the filter has been removed, rotating parts (such as the fan), electrically charged areas, etc. will be exposed in the unit’s opening. Bear in mind the dangers that these parts and areas pose, and proceed with the work carefully

Push the side of the air filter marked with the indication arrow  and pull it toward you. The air filter will be disengaged.

CAUTION

• Certain metal edges and the condenser fins are sharp and may cause injury if handled improperly; special care should be taken when you clean these parts.
• Periodically check the outdoor unit to see if the air outlet or air intake is clogged with dirt or soot.
• The internal coil and other components must also be cleaned periodically. Consult your dealer or service centre.

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 period

• Operate the fan for half a day to dry out the inside.
• Disconnect the power supply and turn off the circuit breaker.
• Clean the air filter and replace it in its original position.
• Outdoor unit internal components must be checked and cleaned periodically. Contact your local dealer for this service.

CHECK THE FOLLOWING ITEMS WHEN INSTALLATION IS COMPLETE

• After completing work, be sure to measure and record trial run properties, and store measuring data, etc.
• Measuring items are room temperature, outside temperature, suction temperature, blow-out temperature, wind velocity wind volume, voltage, current, presence of abnormal vibration and noise, operating pressure, piping temperature, compressive pressure, and airtight pressure.
• As to the structure and appearance, check the following items.
  • Is the circulation of air adequate?
  • Is draining smoothly?
  • Is heat insulation complete?
  • (refrigerant and drain piping)?
  • Is there any leakage of refrigerant?
  • Is the remote controller switch operated?
  • Is there any faulty wiring?
  • Are the terminal screws loosened?
  • M3…69-98N•cm {7-10kgf•cm}
  • M4…157-196N•cm {16-20kgf•cm}
  • M5…196-245N•cm {20-25kgf•cm}
• HAND OVER
  • Teach the customer the operation and maintenance procedures, using the operation manual (air filter cleaning, temperature control, etc.)
• Optional Parts
  • Refer to the Installation manual for optional parts (sold separately).

As for work specifications of the outdoor unit, read the OUTDOOR UNIT INSTALLATION MANUAL attached to the outdoor unit. The English text is the original instructions. Other languages are translations of original instructions.

• Model No.:
  • S-1821PU
  • S-2430PU
  • S-3448PU

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