MITSUBISHI ELECTRIC PEFY-P0 Air Conditioners Instruction Manual

MITSUBISHI ELECTRIC PEFY-P0 Air Conditioners

INSTALLATION MANUAL
For safe and correct use, please read this installation manual thoroughly before installing the air-conditioner unit.

OVERVIEW

Note: If you use other remote controllers, refer to either the Installation Manual or Initial Setting Manual that comes with the controller to be used.

Safety precautions

Before installation and electric work

• Before installing the unit, make sure you read all the “Safety precautions”.
• The “Safety precautions” provide very important points regarding safety. Make sure you follow them.

Symbols used in the text

Warning
Describes precautions that should be observed to prevent danger of injury or death to the user.

Caution
Describes precautions that should be observed to prevent damage to the unit.

Symbols used in the illustrations

Warning: Carefully read the labels affixed to the main unit.

• Ask the dealer or an authorized technician to install the air conditioner.

  • Improper installation by the user may result in water leakage, electric shock, or fire.

• This appliance is not intended for use by persons (including children) with reduced physical, sensory, or mental capabilities, or lack of experience and knowledge unless they have been given supervision or instruction concerning the use of the appliance by a person responsible for their safety.

• Install the air unit at a place that can withstand its weight.

  • Inadequate strength may cause the unit to fall, resulting in injuries.

• Use the specified cables for wiring. Make the connections securely so that the outside force of the cable is not applied to the terminals.

  • Inadequate connection and fastening may generate heat and cause a fire.

• Prepare for typhoons and other strong winds and earthquakes and install the unit at the specified place.

  • Improper installation may cause the unit to topple and result in injury.

• Always use an air cleaner, humidifier, electric heater, and other accessories specified by MITSUBISHI ELECTRIC CORPORATION.

  • Ask an authorized technician to install the accessories. Improper installation by the user may result in water leakage, electric shock, or fire.

• Never repair the unit. If the air conditioner must be repaired, consult the dealer.

• If the unit is repaired improperly, water leakage, electric shock, or fire may result.

• If the supply cord is damaged, it must be replaced by the manufacturer, its service agent, or similarly qualified persons to avoid a hazard.

• Do not touch the heat exchanger fins.

  • Improper handling may result in injury.

• When handling this product, always wear protective equipment.
  EG: Gloves, full arm protection namely boiler suit, and safety glasses.

  • Improper handling may result in injury.

• If refrigerant gas leaks during installation work, ventilate the room.

  • If the refrigerant gas comes into contact with a flame, poisonous gases will be released.

• Install the air conditioner according to this Installation Manual.

  • If the unit is installed improperly, water leakage, electric shock, or fire may result.

• Have all electric work done by a licensed electrician according to the “Electric Facility Engineering Standard” and “Interior Wire Regulations” and the instructions given in this manual and always use a special circuit.

  • If the power source capacity is inadequate or electric work is performed improperly, electric shock and fire may result.

• Keep the electric parts away from water (washing water etc.).

  • It might result in electric shock, catching fire, or smoke.

• Securely install the outdoor unit terminal cover (panel).

  • If the terminal cover (panel) is not installed properly, dust or water may enter the outdoor unit, and fire or electric shock may result.

• Do not use refrigerant other than the type indicated in the manuals provided with the unit and on the nameplate.

  • Doing so may cause the unit or pipes to burst, or result in an explosion or fire during use, during repair, or at the time of disposal of the unit.
  • It may also violate applicable laws.
  • MITSUBISHI ELECTRIC CORPORATION cannot be held responsible for malfunctions or accidents resulting from the use of the wrong type of refrigerant.

• If the air conditioner is installed in a small room, measures must be taken to prevent the refrigerant concentration from exceeding the safety limit even if the refrigerant should leak.

  • Consult the dealer regarding the appropriate measures to prevent the safety limit from being exceeded. Should the refrigerant leak and cause the safety limit to be exceeded, hazards due to lack of oxygen in the room could result.

• When moving and reinstalling the air conditioner, consult the dealer or an authorized technician.

  • If the air conditioner is installed improperly, water leakage, electric shock, or fire may result.

• After completing installation work, make sure that refrigerant gas is not leaking.

  • If the refrigerant gas leaks and is exposed to a fan heater, stove, oven, or other heat source, it may generate noxious gases.

• Do not reconstruct or change the settings of the protection devices.

  • If the pressure switch, thermal switch, or other protection device is shorted and operated forcibly, or parts other than those specified by MITSUBISHI ELECTRIC CORPORATION are used, fire or explosion may result.

• To dispose of this product, consult your dealer.

• Do not use a leak detection additive.

• Exercise caution when using any auxiliary heat source and follow all third-party manufacturer instructions and safety guidelines for installation and usage.

• Any auxiliary heat source connected to this unit via the CN24 connection must have an independent temperature control mechanism. Failure to install and maintain such a temperature control mechanism may void the warranty for this unit.

• Mitsubishi Electric shall not bear any warranty obligation or other liability for any damage or loss in connection with such third-party auxiliary heaters.

• The installer and system specialist shall secure safety against leakage according to local regulations or standards.

  • The instructions in this manual may be applicable if local regulations are not available.

• Pay special attention to the place, such as a basement, etc. where refrigeration gas can stay, since refrigeration is heavier than the air.

• Children should be supervised to ensure that they do not play with the appliance.

• This appliance is intended to be used by expert or trained users in shops, in light industry and on farms, or for commercial use by lay persons.

Precautions for devices that use R410A refrigerant

Caution

• Do not use the existing refrigerant piping.
  • The old refrigerant and refrigerator oil in the existing piping contains a large amount of chlorine which may cause the refrigerator oil of the new unit to deteriorate.
• Use refrigerant piping made of C1220 (Cu-DHP) phosphorus-deoxidized copper as specified in the JIS H3300 “Copper and copper alloy seamless pipes and tubes”. In addition, be sure that the inner and outer surfaces of the pipes are clean and free of hazardous sulfur, oxides, dust/dirt, shaving particles, oils, moisture, or any other contaminant.
  • Contaminants on the inside of the refrigerant piping may cause the refrigerant residual oil to deteriorate.
• Store the piping to be used during installation indoors and keep both ends of the piping sealed until just before brazing. (Store elbows and other joints in a plastic bag.)
  • If dust, dirt, or water enters the refrigerant cycle, deterioration of the oil and compressor trouble may result.
• Use liquid refrigerant to fill the system.
  • If gas refrigerant is used to seal the system, the composition of the refrigerant in the cylinder will change and performance may drop.
• Do not use a refrigerant other than R410A.
  • If another refrigerant (R22, etc.) is used, the chlorine in the refrigerant may cause the refrigerator oil to deteriorate.
• Use a vacuum pump with a reverse flow check valve.
  • The vacuum pump oil may flow back into the refrigerant cycle and cause the refrigerator oil to deteriorate.
• Do not use the following tools that are used with conventional refrigerants. (Gauge manifold, charge hose, gas leak detector, reverse flow check valve, refrigerant charge base, vacuum gauge, refrigerant recovery equipment)
  • If the conventional refrigerant and refrigerator oil are mixed in the R410A, the refrigerant may deteriorate.
  • If water is mixed in the R410A, the refrigerator oil may deteriorate.
  • Since R410A does not contain any chlorine, gas leak detectors for conventional refrigerants will not react to it.
• Do not use a charging cylinder.
  • Using a charging cylinder may cause the refrigerant to deteriorate.
• Be especially careful when managing the tools.
  • If dust, dirt, or water gets in the refrigerant cycle, the refrigerant may deteriorate.

Before getting installed

Caution

• Do not install the unit where combustible gas may leak.
  • If the gas leaks and accumulates around the unit, an explosion may result.
• Do not use the air conditioner where food, pets, plants, precision instruments, or artwork are kept.
  • The quality of the food, etc. may deteriorate.
• Do not use the air conditioner in special environments.
  • Oil, steam, sulfuric smoke, etc. can significantly reduce the performance of the air conditioner or damage its parts.
• When installing the unit in a hospital, communication station, or similar place, provide sufficient protection against noise.
  • The inverter equipment, private power generator, high-frequency medical equipment, or radio communication equipment may cause the air conditioner to operate erroneously, or fail to operate. On the other hand, the air conditioner may affect such equipment by creating noise that disturbs medical treatment or image broadcasting.
• Do not install the unit on a structure that may cause leakage.
  • When the room humidity exceeds 80% or when the drain pipe is clogged, condensation may drip from the indoor unit. Perform collective drainage work together with the outdoor unit, as required.
• The indoor units should be installed on the ceiling at least 2.5 m [9 ft] from the floor.

Before getting installed (moved) – electrical work

Caution:

Ground the unit.

• Do not connect the ground wire to gas or water pipes, lightning rods, or telephone ground lines. Improper grounding may result in electric shock.
• Install the power cable so that tension is not applied to the cable.
  • Tension may cause the cable to break generate heat and cause a fire.
• Install a leak circuit breaker, as required.
  • If a leak circuit breaker is not installed, electric shock may result.
• Use power line cables of sufficient current carrying capacity and rating.
  • Cables that are too small may leak, generate heat, and cause a fire.
• Use only a circuit breaker and fuse of the specified capacity.
  • A fuse or circuit breaker of a larger capacity or a steel or copper wire may result in a general unit failure or fire.
• Do not wash the air conditioner units.
  • Washing them may cause an electric shock.
• Be careful that the installation base is not damaged by long use.
  • If the damage is left uncorrected, the unit may fall and cause personal injury or property damage.
• Install the drain piping according to this Installation Manual to ensure proper drainage. Wrap thermal insulation around the pipes to prevent condensation.
  • Improper drain piping may cause water leakage and damage to furniture and other possessions.

Be very careful about product transportation.

• Only one person should not carry the product if it weighs more than 20 kg [45 LBS].
• Some products use PP bands for packaging. Do not use any PP bands as a means of transportation. It is dangerous.
• Do not touch the heat exchanger fins. Doing so may cut your fingers.
• When transporting the outdoor unit, suspend it at the specified positions on the unit base. Also, support the outdoor unit at four points so that it cannot slip sideways.

Safely dispose of the packing materials.

• Packing materials, such as nails and other metal or wooden parts, may cause stabs or other injuries.
• Tear apart and throw away plastic packaging bags so that children will not play with them. If children play with a plastic bag that was not torn apart, they face the risk of suffocation.

Before starting the test run

Caution

• Turn on the power at least 12 hours before starting the operation.
  • Starting operation immediately after turning on the main power switch can result in severe damage to internal parts. Keep the power switch turned on during the operational season.
• Do not touch the switches with wet fingers.
  • Touching a switch with wet fingers can cause an electric shock.
• Do not touch the refrigerant pipes during and immediately after operation.
  • During and immediately after operation, the refrigerant pipes may be hot and may be cold, depending on the condition of the refrigerant flowing through the refrigerant piping, compressor, and other refrigerant cycle parts. Your hands may suffer burns or frostbite if you touch the refrigerant pipes.
• Do not operate the air conditioner with the panels and guards removed.
  • Rotating, hot, or high-voltage parts can cause injuries.
• Do not turn off the power immediately after stopping the operation.
  • Always wait at least five minutes before turning off the power. Otherwise, water leakage and trouble may occur.

Indoor unit accessories

The unit is provided with the following accessories:

Selecting an installation site

• Select a site with a sturdy fixed surface sufficiently durable against the weight of the unit.

• Before installing the unit, the routing to carry in unit to the installation site should be determined.

• Select a site where the unit is not affected by entering air.

• Select a site where the flow of supply and return air is not blocked.

• Select a site where refrigerant piping can easily be led to the outside.

• Select a site that allows the supply air to be distributed fully in the room.

• Do not install a unit at a site with oil splashing or steam in much quantity.

• Do not install a unit at a site where combustible gas may generate, flow in, stagnate, or leak.

• Do not install a unit at a site where equipment generating high-frequency waves (a
  high-frequency wave welder for example) is provided.

• Do not install a unit at a site where the fire detector is located at the supply air side. (Fire detector may operate erroneously due to the heated air supplied during heating operation.)

• When special chemical products may scatter around such as site chemical plants and hospitals, a full investigation is required before installing the unit. (The plastic components may be damaged depending on the chemical product applied.)

• If the unit is run for long hours when the air above the ceiling is at high temperature/high humidity (dew point above 26°C [79°F]), dew condensation may be produced in the indoor unit. When operating the units in this condition, add insulation material (10-20 mm [13/32 to 13/16 in]) to the entire surface of the indoor unit to avoid dew condensation.

Install the indoor unit on a ceiling strong enough to sustain its weight

Warning:
The unit must be securely installed on a structure that can sustain its weight. If the unit is mounted on an unstable structure, it may fall causing injuries.

Securing installation and service space
Secure enough access space to allow for the maintenance, inspection, and replacement of the motor, fan, drain pump, heat exchanger, and electric box in one of the following ways. Select an installation site for the indoor unit so that its maintenance access space will not be obstructed by beams or other objects.

1. When a space of 300 mm [11-13/16 in] or more is available below the unit between the unit and the ceiling (Fig. 3.2.1)

   • Create access door 1 and 2 (450 x 450 mm [17-3/4 x 17-3/4 in] each) as shown in Fig. 3.2.2. (Access door 2 is not required if enough space is available below the unit for a maintenance worker to work in.)

2. When a space of less than 300 mm [11-13/16 in] is available below the unit between the unit and the ceiling (At least 20 mm [13/16 in] of space should be left below the unit as shown in Fig. 3.2.3.)

3. Create access door 1 diagonally below the electric box and access door 3 below the unit as shown in Fig. 3.2.4.
   or

4. Create access door 4 below the electric box and the unit as shown in Fig. 3.2.5.

• [Fig. 3.2.1] (P.2)
• [Fig. 3.2.2] (Viewed from the direction of the arrow A) (P.2)
• [Fig. 3.2.3] (P.2)
• [Fig. 3.2.4] (Viewed from the direction of the arrow B) (P.2)
• [Fig. 3.2.5] (Viewed from the direction of the arrow B) (P.2)
  • An Electric box
  • B Ceiling
  • C Ceiling beam
  • D Access door 2 (450 mm x 450 mm [17-3/4 in x 17-3/4 in])
  • E-Access door 1 (450 mm x 450 mm [17-3/4 in x 17-3/4 in])
  • F Maintenance access space
  • H Intake air
  • J Access door 3
  • G Supply air
  • I Bottom of the indoor unit
  • K Access door 4

Combining indoor units with outdoor units

For combining indoor units with outdoor units, refer to the outdoor unit installation manual.

Fixing hanging bolts

• A Center of gravity (Give site of suspension strong structure.)

Center of Gravity and Product Weight

Model name| W (mm [in])| L (mm [in])| X (mm [in])| Y (mm [in])| Z (mm [in])| Product Weight (kg [lb])
---|---|---|---|---|---|---
PEFY-P06NMAU-E4| 643 [25-5/16]| 754 [29-11/16]| 330 [13]| 300 [11-13/16]| 130 [5-1/8]| 21 [47]
PEFY-P08NMAU-E4| 643 [25-5/16]| 754 [29-11/16]| 330 [13]| 300 [11-13/16]| 130 [5-1/8]| 21 [47]
PEFY-P12NMAU-E4| 643 [25-5/16]| 754 [29-11/16]| 330 [13]| 300 [11-13/16]| 130 [5-1/8]| 21 [47]
PEFY-P15NMAU-E4| 643 [25-5/16]| 954 [37-9/16]| 340 [13-3/8]| 375 [14-3/4]| 130 [5-1/8]| 26 [58]
PEFY-P24NMAU-E4| 643 [25-5/16]| 1154 [45-7/16]| 325 [12-13/16]| 525 [20-11/16]| 130 [5-1/8]| 30 [67]
PEFY-P27NMAU-E4| 643 [25-5/16]| 1154 [45-7/16]| 325 [12-13/16]| 525 [20-11/16]| 130 [5-1/8]| 30 [67]
PEFY-P36NMAU-E4| 643 [25-5/16]| 1454 [57-1/4]| 330 [13]| 675 [26-9/16]| 130 [5-1/8]| 38 [84]
PEFY-P48NMAU-E4| 643 [25-5/16]| 1454 [57-1/4]| 330 [13]| 675 [26-9/16]| 130 [5-1/8]| 39 [86]
PEFY-P54NMAU-E4| 643 [25-5/16]| 1654 [65-1/8]| 332 [13-1/16]| 725 [28-9/16]| 130 [5-1/8]| 41 [91]
PEFY-P18NMAU-E5| 643 [25-5/16]| 1154 [45-7/16]| 325 [12-13/16]| 525 [20-11/16]| 130 [5-1/8]| 30 [67]
PEFY-P30NMAU-E5| 643 [25-5/16]| 1454 [57-1/4]| 330 [13]| 675 [26-9/16]| 130 [5-1/8]| 38 [84]

Hanging structure

• Ceiling: The ceiling structure varies from building to one another. For detailed information, consult your construction company.
• If necessary, reinforce the hanging bolts with anti-quake supporting members as countermeasures against earthquakes.
  • Use M10 for hanging bolts and anti-quake supporting members (field supply).

Installing the unit

Hanging the unit body

• Bring the indoor unit to an installation site as it is packed.
• To hang the indoor unit, use a lifting machine to lift and pass through the hanging bolts.

[Fig. 5.1.1] (P.3)

• A Unit body

• B Lifting machine
  [Fig. 5.1.2] (P.3)

• C Nuts (field supply)

• D Washers (square) (accessory)

• E M10 hanging bolt (field supply)

Confirming the unit’s position and fixing hanging bolts

• Ensure that the hanging bolt nuts are tightened to fix the hanging bolts.
• To ensure that the drain is discharged, be sure to hang the unit at a level using a level.

Caution
Install the unit in a horizontal position. If the side with the drain port is installed higher, water leakage may be caused.

Refrigerant pipe and drain pipe specifications

To avoid dew drops, provide sufficient anti-sweating and insulating work to the refrigerant and drain pipes. When using commercially available refrigerant pipes, be sure to wind commercially available insulating material (with a heat-resisting temperature of more than 100°C [212°F] and thickness given below) onto both liquid and gas pipes. Insulate all indoor pipes with form polyethylene insulation with a minimum density of 0.03 and a thickness as specified in the table below.

1. Select the thickness of the insulating material by pipe size.
   • Pipe size Insulating material’s thickness
   • 6.4 mm to 25.4 mm [1/4 to 1 in] More than 10 mm [7/16 in]
   • 28.6 mm to 38.1 mm [1-1/8 to 1-1/2 in] More than 15 mm [5/8 in]
2. If the unit is used on the highest story of a building and under conditions of high temperature and humidity, it is necessary to use pipe size and insulating material’s thickness more than those given in the table above.
3. If there are customer’s specifications, simply follow them.

Refrigerant pipe and drain pipe specifications

Model

Item

| PEFY-P·NMAU-E4| PEFY-P·NMAU-E5
---|---|---
06·08·12·15| 24·27·36·48·54| 18| 30
Refrigerant pipe (Brazing connection)| Liquid pipe| ø 6.35 [1/4]| ø 9.52 [3/8]| ø 6.35 [1/4]| ø 9.52 [3/8]
Gas pipe| ø 12.7 [1/2]| ø 15.88 [5/8]| ø 12.7 [1/2]| ø 15.88 [5/8]
Drain pipe| O.D. ø 32 [1-1/4]| O.D. ø 32 [1-1/4]

Refrigerant pipe, drain pipe

[Fig. 6.2.1] (P.3)

• A Refrigerant pipe (liquid pipe)
• B Refrigerant pipe (gas pipe)
• C Drain pipe (O.D. ø32 mm [1-1/4 in])
• D Drain pipe (O.D. ø32 mm [1-1/4 in], spontaneous draining)

Connecting refrigerant pipes and drain pipes

Refrigerant piping work
This piping work must be done by the installation manuals for both the outdoor unit and BC controller (simultaneous cooling and heating series R2).

• Series R2 is designed to operate in a system in which the refrigerant pipe from an outdoor unit is received by the BC controller and branches at the BC controller to connect between indoor units.
• For constraints on pipe length and allowable difference of elevation, refer to the outdoor unit manual.
• The method of pipe connection is a brazing connection.

Caution:

• Install the refrigerant piping for the indoor unit following the following.

  1. Cut the tip of the indoor unit piping, remove the gas, and then remove the brazed cap.
     [Fig. 7.1.1] (P.4)

• A Cut here

• B Remove the brazed cap

• Pull out the thermal insulation on the site refrigerant piping, braze the unit piping, and replace the insulation in its original position. Wrap the piping with insulating tape.

Note

• When blazing the refrigerant pipes, be sure to blaze, after covering a wet cloth to the pipes of the units to prevent them from burning and shrinking by heat. [Fig. 7.1.2] (P.4)
• Cool with a wet cloth

Pay strict attention when wrapping the copper piping since wrapping the piping may cause condensation instead of preventing it. [Fig. 7.1.3] (P.4)

• A Thermal insulation
• B Pull out insulation
• C Wrap with a damp cloth
• D Return to the original position
• E Ensure that there is no gap here
• F Wrap with insulating tape

Cautions On Refrigerant Piping

• Be sure to use non-oxidative brazing for brazing to ensure that no foreign matter or moisture enters the pipe.
• Be sure to apply refrigerating machine oil over the flare connection seating surface and tighten the connection using a double spanner.
• Provide a metal brace to support the refrigerant pipe so that no load is imparted to the indoor unit end pipe. This metal brace should be provided 50 cm away from the indoor unit’s flare connection.

Warning
Do not use refrigerant other than the type indicated in the manuals provided with the unit and on the nameplate.

• Doing so may cause the unit or pipes to burst, or result in an explosion or fire during use, during repair, or at the time of disposal of the unit.
• It may also violate applicable laws.
• MITSUBISHI ELECTRIC CORPORATION cannot be held responsible for malfunctions or accidents resulting from the use of the wrong type of refrigerant.

Caution

• Use refrigerant piping made of C1220 (Cu-DHP) phosphorus-deoxidized copper as specified in the JIS H3300 “Copper and copper alloy seamless pipes and tubes”. In addition, be sure that the inner and outer surfaces of the pipes are clean and free of hazardous sulfur, oxides, dust/dirt, shaving particles, oils, moisture, or any other contaminant.
• Never use existing refrigerant piping.
  • The large amount of chlorine in conventional refrigerant and refrigerator oil in the existing piping will cause the new refrigerant to deteriorate.
• Store the piping to be used during installation indoors and keep both ends of the piping sealed until just before brazing.
  • If dust, dirt, or water gets into the refrigerant cycle, the oil will deteriorate and the compressor may fail.
• Use ester oil, ether oil, or alkylbenzene (small amount) as the refrigerator oil to coat flares and flange connections. (For models using R410A or R407C)
  • The refrigerant used in the unit is highly hygroscopic and mixes with water and will degrade the refrigerator oil.

Drain piping work

• Ensure that the drain piping is downward (pitch of more than 1/100) to the outdoor (discharge) side. Do not provide any trap or irregularity on the way.

• Ensure that any cross-wise drain piping is less than 20 m [65 ft] (excluding the difference of elevation). If the drain piping is long, provide metal braces to prevent it from waving. Never provide any air vent pipe. Otherwise, drain may be ejected.

• Use a hard vinyl chloride pipe O.D. ø32 mm [1-1/4 in] for drain piping.

• Ensure that collected pipes are 10 cm [3-15/16 in] lower than the unit body’s drain port.

• Do not provide any odor trap at the drain discharge port.

• Put the end of the drain piping in a position where no odor is generated.

• Do not put the end of the drain piping in any drain where ionic gases are generated. [Fig. 7.2.1] (P.4)

  • ○ Correct piping

  • × Wrong piping

  • An Insulation (9 mm [3/8 in] or more)

  • B Downward slope (1/100 or more)

  • C Support metal

  • K Air bleeder

  • L Raised

  • M Odor trap
    Grouped piping

  • D O.D. ø32 mm [1-1/4 in] PVC TUBE

  • E Make it as large as possible. About 10 cm [3-15/16 in].

  • F Indoor unit

  • G Make the piping size large for grouped piping.

  • H Downward slope (1/100 or more)

  • I O. D. ø38 mm [1-1/2 in] PVC TUBE for grouped piping. (9 mm [3/8 in] or more insulation)

  • J Up to 700 mm [27-9/16 in]

  • N Drain hose (accessory)

  • O Horizontal or slightly upgradient

1. Insert the drain hose (accessory) into the drain port (insertion margin: 32 mm [1-1/4 in]). (The drain hose must not be bent more than 45° to prevent the hose from breaking or clogging.) (Attach the hose with glue, and fix it with the band (accessory).)
2. Attach the drain pipe (O.D. ø32 mm [1-1/4 in] PVC TUBE PV-25, field supply). (Attach the pipe with glue, and fix it with the band (accessory).)
3. Perform insulation work on the drain pipe (O.D. ø32 mm [1-1/4 in] PVC TUBE PV-25) and the socket (including elbow).
4. Check the drainage. (Refer to [Fig. 7.3.1])
5. Attach the insulating material, and fix it with the band (accessory) to insulate the drain port.

[Fig. 7.2.2] (P.4)

• An Indoor unit
• B Tie band (accessory)
• C Visible part
• D Insertion margin
• E Drain hose (accessory)
• F Drain pipe (O.D. ø32 mm [1-1/4 in] PVC TUBE, field supply)
• G Insulating material (field supply)
• H Tie band (accessory)

Confirming drain discharge

• Make sure that the drain-up mechanism operates normally for discharge and that there is no water leakage from the connections.
• Be sure to confirm the above in a period of heating operation.
• Be sure to confirm the above before ceiling work is done in the case of a new construction.

1. Remove the water supply port cover on the same side as the indoor unit piping.
2. Fill water into the feed water pump using a feed water tank. In filling, be sure to put the end of the pump or tank in a drain pan. (If the insertion is incomplete, water may flow over the machine.)
3. Perform the test run in cooling mode, or connect the connector to the ON side of SWE on the Indoor controller board. (The drain pump and the fan are forced to operate without any remote controller operation.) Make sure using a transparent hose that the drain is discharged.
4. After confirmation, cancel the test run mode, and turn off the main power. If the connector is connected to the ON side of SWE, disconnect it connect it to the OFF side, and attach the water supply port cover into its original position.

[Fig. 7.3.1] (P.5)

• A Insert pump’s end is 2 to 4 cm [13/16 to 1-5/8 in].
• B Remove the water supply port.
• C About 2500 cc
• D Water
• E Filling port
• F Screw

[Fig. 7.3.2] (P.5)

Ductwork

• In connecting duct, insert canvas duct between unit and duct.
• Use incombustible material for duct parts.
• Provide full insulation to the inlet duct flange and outlet duct to prevent condensation.
• Be sure to change the position of the air filter to the position where it can be serviced.

[Fig. 8.0.1] (P.5)

• In case of rear inlet
• In case of bottom inlet
  • A Duct
  • B Air inlet
  • C Access door
  • D Canvas duct
  • E Ceiling surface
  • F Air outlet
  • G Leave distance enough to prevent the short cycle
• Procedure for changing the rear inlet to the bottom inlet.