MITSUBISHI ELECTRIC PKA-A.LA Series Split System Heat Pump User Manual

SPLIT-SYSTEM HEAT PUMP
PKA-A·LA Series
INSTALLATION MANUAL

PKA-A.LA Series Split System Heat Pump

For safe and correct use, read this manual and the outdoor unit installation manual thoroughly before installing the air-conditioner unit.
Note:
In this installation manual, the term “Wired remote controller” refers only to the PAR-41MAA and the term “Wireless remote controller” refers only to the PAR-SL101A-E. If you need any information for other remote controllers, refer to the installation manual that is included with the grilled, which includes a remote controller, or the initial setting manual that is included with the optional remote controller.

Safety precautions

► 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.
► Please report to your supply authority or obtain their consent before connecting this equipment to the power supply system.
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
: Indicates a part which must be grounded.
: Be sure not to do.
After installation work has been completed, explain the “Safety Precautions,” use, and maintenance of the unit to the customer according to the information in the Operation Manual and perform the test run to ensure normal operation. Both the Installation Manual and Operation Manual must be given to the user for keeping. These manuals must be passed on to subsequent users.
Warning:

• Carefully read the labels affixed to the main unit.
• Ask a dealer or an authorized technician to install, relocate and repair the unit.
• The user should never attempt to repair the unit or transfer it to another location.
• For installation and relocation work, follow the instructions in the Installation Manual and use tools and pipe components specifically made for use with refrigerant specified in the outdoor unit installation manual.
• The unit must be installed according to the instructions in order to minimize the risk of damage from earthquakes, typhoons, or strong winds. An incorrectly installed unit may fall down and cause damage or injuries.
• Do not alter the unit. It may cause fire, electric shock, injury or water leakage.
• The unit must be securely installed on a structure that can sustain its weight.
• The appliance shall be stored in a well-ventilated area where the room size corresponds to the room area as specified for operation.
• If the air conditioner is installed in a small room or closed room, measures must be taken to prevent the refrigerant concentration in the room from exceeding the safety limit in the event of refrigerant leakage. Should the refrigerant leak and cause the concentration limit to be exceeded, hazards due to lack of oxygen in the room may result.
• Keep gas-burning appliances, electric heaters, and other fire sources (ignition sources) away from the location where installation, repair, and other air conditioner work will be performed. If refrigerant comes into contact with a flame, poisonous gases will be released.
• Ventilate the room if refrigerant leaks during operation. If refrigerant comes into contact with a flame, poisonous gases will be released.
• All electric work must be performed by a qualified technician according to local regulations and the instructions given in this manual.
• Do not use intermediate connection of the electric wires.
• Use only specified cables for wiring. The wiring connections must be made securely with no tension applied on the terminal connections. Also, never splice the cables for wiring (unless otherwise indicated in this document). Failure to observe these instructions may result in overheating or a fire. en
• When installing or relocating, or servicing the air conditioner, use only the specified refrigerant written on outdoor unit to charge the refrigerant lines. Do not mix it with any other refrigerant and do not allow air to remain in the lines.

The use of any refrigerant other than that specified for the system will cause mechanical failure or system malfunction or unit breakdown. In the worst case, this could lead to a serious impediment to securing product safety.

• The appliance shall be installed in accordance with national wiring regulations.
• 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 use of the appliance by a person responsible for their safety.
• Children should be supervised to ensure that they do not play with the appliance.
• The terminal block cover panel of the unit must be firmly attached.
• If the supply cord is damaged, it must be replaced by the manufacturer, its service agent or similarly qualified persons in order to avoid a hazard.
• Use only authorized accessories by Mitsubishi Electric and ask a dealer or an authorized technician to install them. If accessories are incorrectly installed, water leakage, electric shock, or fire may result.
• After installation has been completed, check for refrigerant leaks. If refrigerant leaks into the room and comes into contact with the flame of a heater or portable cooking range, poisonous gases will be released.
• Do not use means to accelerate the defrosting process or to clean, other than those recommended by the manufacturer.
• The appliance shall be stored in a room without continuously operating ignition sources (for example: open flames, an operating gas appliance or an operating electric heater).
• Do not pierce or burn.
• Be aware that refrigerants may not contain an odour.
• Pipe-work shall be protected from physical damage.
• The installation of pipe-work shall be kept to a minimum.
• Compliance with national gas regulations shall be observed.
• Keep any required ventilation openings clear of obstruction.
• Do not use low temperature solder alloy in case of brazing the refrigerant pipes. air is mixed with the refrigerant, then it can be the cause of abnormal high pressure in the refrigerant line, and may result in an explosion and other hazards.
• When performing brazing work, be sure to ventilate the room sufficiently. Make sure that there are no hazardous or flammable materials nearby. When performing the work in a closed room, small room, or similar location, make sure that there are no refrigerant leaks before performing the work. If refrigerant leaks and accumulates, it may ignite or poisonous gases may be released.
• 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 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.
1.1. Before installation (Environment)
Caution:

• Do not use the unit in an unusual environment. If the air conditioner is installed in areas exposed to steam, volatile oil (including machine oil), or sulfuric gas, areas exposed to high salt content such as the seaside, the performance can be significantly reduced and the internal parts can be damaged.
• Do not install the unit where combustible gases may leak, be produced, flow, or accumulate. If combustible gas accumulates around the unit, fire or explosion may result.
• Do not keep food, plants, caged pets, artwork, or precision instruments in the direct airflow of the indoor unit or too close to the unit, as these items can be damaged by temperature changes or dripping water.
• When the room humidity exceeds 80% or when the drainpipe is clogged, water may drip from the indoor unit. Do not install the indoor unit where such dripping can cause damage.
• When installing the unit in a hospital or communications office, be prepared for noise and electronic interference. Inverters, home appliances, high-frequency medical equipment, and radio communications equipment can cause the air conditioner to malfunction or breakdown. The air conditioner may also affect medical equipment, disturbing medical care, and communications equipment, harming the screen display quality.

1.2. Before installation or relocation
Caution:

• Be extremely careful when transporting the units. Two or more persons are needed to handle the unit, as it weighs 20 kg, 44 lbs or more. Do not grasp the packaging bands. Wear protective gloves as you can injure your hands on the fins or other parts.
• Be sure to safely dispose of the packaging materials. Packaging materials, such as nails and other metal or wooden parts may cause stabs or other injuries.
• Thermal insulation of the refrigerant pipe is necessary to prevent condensation. If the refrigerant pipe is not properly insulated, condensation will be formed.
• Place thermal insulation on the pipes to prevent condensation. If the drainpipe is installed incorrectly, water leakage and damage to the ceiling, floor, furniture, or other possessions may result.
• Do not clean the air conditioner unit with water. Electric shock may result.
• Tighten all flare nuts to specification using a torque wrench. If tightened too much, the flare nut can break after an extended period.
• If the unit is run for long hours when the air above the ceiling is at high temperature/high humidity (dew point above 26 ºC, 79 ºF), dew condensation may be produced in the indoor unit or the ceiling materials. When operating the units in this condition, add insulation material (10-20 mm, 25/64-25/32 inch) to the entire surface of the unit and ceiling materials to avoid dew condensation.

1.3. Before electric work
Caution:

• Be sure to install circuit breakers. If not installed, electric shock may result.
• For the power lines, use standard cables of sufficient capacity. Otherwise, a short circuit, overheating, or fire may result.
• When installing the power lines, do not apply tension to the cables.
• Be sure to ground the unit. If the unit is not properly grounded, electric shock may result.
• Use circuit breakers (ground fault interrupter, isolating switch (+B fuse), and molded case circuit breaker) with the specified capacity. If the circuit breaker capacity is larger than the specified capacity, breakdown or fire may result.

1.4. Before starting the test run
Caution:

• Turn on the main power switch more than 12 hours before starting operation. Starting operation just after turning on the power switch can severely damage the internal parts.
• Before starting operation, check that all panels, guards and other protective parts are correctly installed. Rotating, hot, or high voltage parts can cause injuries.
• Do not operate the air conditioner without the air filter set in place. If the air filter is not installed, dust may accumulate and breakdown may result.
• Do not touch any switch with wet hands. Electric shock may result.
• Do not touch the refrigerant pipes with bare hands during operation.
• After stopping operation, be sure to wait at least five minutes before turning off the main power switch. Otherwise, water leakage or breakdown may result.

Installation location

2.1. Outline dimensions (Indoor unit) (Fig. 2-1, 2-2)
Select a proper position allowing the following clearances for installation and maintenance.
(mm, inch)

237
9-11/32| 898
35-23/64| 299
11-25/32| Min. 150
Min.
5-29/32| Min. 50
Min.
1-31/32| Min. 50
Min.
1-31/32| Min. 250
Min.
9-27/32| Min. 260
Min.
10-1/4

F Air outlet: Do not place an obstacle within 1500 mm, 59-1/16 inch of the air outlet.
G Floor surface
H Furnishings
I When the projection dimension of a curtain rail or the like from the wall exceeds 60 mm, 2-23/64 inch, extra distance should be taken because the fan air current may create a short cycle.
J 1800 mm, 70-55/64 inch or greater from the floor surface (for high location mounting)
K 75 mm, 2-61/64 inch, or greater with left, rear left, or lower left piping, and optional drain pump installation. (Use the hook positioned on the lower part of the mount board when the dimension is 55 mm, 2-11/64 inch or greater and less than 75 mm, 2-61/64 inch (Less than 55 mm, 2-11/64 inch: NG). Refer to 3.5. for details.)
L 350 mm, 13-25/32 inch or greater with optional drain pump installation
M Refer to Fig. 2-2
(mm, inch)

| I| With Optional DRAIN PUMP
---|---|---
60 or less
2-23/64 or less| 60 or less
2-23/64 or less
M| Min. 7
Min. 9/32| Min. 60
Min. 2-23/64| Min. 250
Min. 9-27/32

• Please keep space to make vane to act.

Installing the indoor unit

3.1. Check the indoor unit accessories (Fig. 3-1)
The indoor unit should be supplied with the following accessories.

3.2. Installing the wall mounting fixture
3.2.1. Setting the wall mounting fixture and piping positions
► Using the wall mounting fixture, determine the unit’s installation position and the locations of the piping holes to be drilled.
Warning:
Before drilling a hole in the wall, you must consult the building contractor.
[Fig. 3-2]
A Mount board 1
B Indoor unit
C Bottom left rear pipe hole (ø75 mm, 2-61/64 inch)
D Bottom right rear pipe hole (ø75 mm, 2-61/64 inch)
E Bottom right rear condit cable hole (ø75 mm, 2-61/64 inch)
F Knockout hole for left rear hole (105 × 300 mm, 3-15/16 × 11-13/16 inch)
G Bolt hole (4-ø9 mm, 23/64 inch hole)
H Tapping hole (6-ø4.3 mm, 11/64 inch hole)
I Hole centre
J Align the scale with the line.
K Insert scale.
3.2.2. Drilling the piping hole (Fig. 3-3)
► Use a core drill to make a hole of 75 – 80 mm, 2-61/64 – 3-5/32 inch diameter in the wall in the piping direction, at the position shown in the diagram to the left.
► The hole should incline so that the outside opening is lower than the inside opening.
► Insert a sleeve (with a 75 mm, 2-61/64 inch diameter and purchased locally) through the hole.
Note:
The purpose of the hole’s inclination is to promote drain flow. 3.2.3. Installing the wall mounting fixture
► Since the indoor unit weighs near 13 kg, 29 lbs, selection of the mounting location requires thorough consideration. If the wall does not seem to be strong enough, reinforce it with boards or beams before installation.
► The mounting fixture must be secured at both ends and at the centre, if possible. Never fix it at a single spot or in any nonsymetrical way.
(If possible, secure the fixture at all the positions marked with a bold arrow.)
Warning:
If possible, secure the fixture at all positions indicated with a bold arrow.
Caution:

• The unit body must be mounted horizontally.
• Fasten at the holes as shown by the arrows.

(Fig. 3-4)
A Min. 119 mm, 4-11/16 inch (669 mm, 26-11/32 inch or greater with optional drain pump installation)
B Min. 224 mm, 8-13/16 inch
C Min. 75 mm, 2-61/64 inch (Use the hook positioned on the lower part of the mount board when the dimension is less than 100 mm, 3-15/16 inch with left, rear left, or lower left piping, and optional drain pump installation. Refer to 3.5. for details.)
D Fixing screws (4 × 25) 2
E Level
F Mount board 1
3.3. When embedding pipes into the wall (Fig. 3-5)

• The pipes are on the bottom left.
• When the cooling pipe, drain pipes internal/external connection lines etc are to be embedded into the wall in advance, the extruding pipes etc, may have to be bent and have their length modified to suit the unit.
• Use marking on the mount board as a reference when adjusting the length of the embedded cooling pipe.
• During construction, give the length of the extruding pipes etc some leeway.
  A Mount board 1
  B Reference marking for flare connection
  C Through hole
  D On-site piping

3.4. Preparing the indoor unit

• Check beforehand because the preparatory work will differ depending on the exiting direction of the piping.

• When bending the piping, bend gradually while maintaining the base of the piping exiting portion. (Abrupt bending will cause misshaping of the piping.)

• Cut off outlet of the pipe depending on the exiting direction of the piping.
  Extraction and processing of the piping and wiring (Fig. 3-6)

  1. Connection of indoor/outdoor wiring → See page 9.

  2. Wrap the felt tape 3 in the range of the refrigerant piping and drain hose which will be housed within the piping space of the indoor unit.
     • Wrap the felt tape 3 securely from the base for each of the refrigerant piping and the drain hose.
     • Overlap the felt tape 3 at one-half of the tape width.
     • Fasten the end portion of the wrapping with vinyl tape.
     A Liquid pipe
     B Gas pipe
     C Indoor/outdoor connection cable
     D Drain hose
     E Felt tape 3

  3. Be careful that the drain hose is not raised, and that contact is not made with the indoor unit box body.
     Do not pull the drain hose forcefully because it might come out.

Rear, right and lower piping (Fig. 3-7)

1. Be careful that the drain hose is not raised, and that contact is not made with the indoor unit box body.
   Arrange the drain hose at the underside of the piping and wrap it with felt tape 3.

2. Securely wrap the felt tape 3 starting from the base. (Overlap the felt tape at one-half of the tape width.)
   A Cut off for right piping.
   B Cut off for lower piping.

Left and left rear piping (Fig. 3-8)
4. Drain hose replacement → See 5. Drainage piping work.
Be sure to replace the drain hose and the drain cap for the left and rear left piping. Dripping may occur if you forget to install or fail to replace these parts.
C Drain cap

1. Be careful that the drain hose is not raised, and that contact is not made with the indoor unit box body.
2. Securely wrap the felt tape 3 starting from the base. (Overlap the felt tape at one-half of the tape width.)
3. Fasten the end portion of the felt tape 3 with vinyl tape.
   D Cut off for left piping.
   3.5. Mounting the indoor unit

1. Affix the mount board 1 to the wall.
2. Hang the indoor unit on the hook positioned on the upper part of the mount board.

Rear, right and lower piping (Fig. 3-9)
3. While inserting the refrigerant piping and drain hose into the wall penetration hole (penetration sleeve), hang the top of the indoor unit to the mount board 1.
4. Move the indoor unit to the left and right, and verify that the indoor unit is hung securely.
5. Fasten by pushing the bottom part of the indoor unit onto the mount board

1. (Fig. 3-10)

• Check that the knobs on the bottom of the indoor unit are securely hooked into the mount board 1.
  6. After installation, be sure to check that the indoor unit is installed level.
  A Mount board 1
  B Indoor unit
  C Hook
  D Square hole
  Left and left rear piping (Fig. 3-11)
  3. While inserting the drain hose into the wall penetration hole (penetration sleeve), hang the top of the indoor unit to the mount board 1.
  Cut part of the shipping box and wrap into a cylindrical form as illustrated in the diagram. Hook this to the rear surface rib as a spacer, and raise the indoor unit.
  4. Connect the refrigerant piping with the site-side refrigerant piping.
  5. Fasten by pushing the bottom part of the indoor unit onto the mount board

• Check that the knobs on the bottom of the indoor unit are securely hooked into the mount board 1.
  6. After installation, be sure to check that the indoor unit is installed level.
  A Indoor unit
  B Shipping box
  C Spacer (Cut out a piece of card board from shipping box.)
  Note:
  • When the indoor unit cannot be hanged and lifted up with the regular hook (the dimension of 2.1. K (the clearance between the ceiling and the unit) is 75 mm, 2-61/64 inch or less), hang the unit on the lower hook for left piping. (Fig. 3-12)
  • The lower hook is a temporary hook only for installation. When the installation is done, be sure to hang the indoor unit on the regular hook.
  The indoor unit cannot be operated while it is hanged on the lower hook.
  (Fig. 3-12)
  A Regular hook
  B Lower hook for left piping
  C Spacer
  D Fixing screw 2
• When using the lower hook, be sure to screw on the base of the lower hook with a fixing screw 2, otherwise the indoor unit will fall.

Installing the refrigerant piping

4.1. Precautions
For devices that use R410A refrigerant

• Use alkylbenzene oil (small amount) as the refrigeration oil applied to the flared sections.
• Use C1220 copper phosphorus for copper and copper alloy seamless pipes, to connect the refrigerant pipes. Use refrigerant pipes with the thicknesses specified in the table below. Make sure the insides of the pipes are clean and do not contain any harmful contaminants such as sulfuric compounds, oxidants, debris, or dust.

Warning:
When installing or relocating, or servicing the air conditioner, use only the specified refrigerant written on outdoor unit to charge the refrigerant lines. Do not mix it with any other refrigerant and do not allow air to remain in the lines. If air is mixed with the refrigerant, then it can be the cause of abnormal high pressure in the refrigerant line, and may result in an explosion and other hazards. The use of any refrigerant other than that specified for the system will cause mechanical failure or system malfunction or unit breakdown. In the worst case, this could lead to a serious impediment to securing product safety.

ø6.35 mm, 1/4 inch thickness 0.8 mm, 1/32 inch| ø9.52 mm, 3/8 inch thickness 0.8 mm, 1/32 inch
---|---
ø12.7 mm, 1/2 inch thickness 0.8 mm, 1/32 inch| ø15.88 mm, 5/8 inch thickness 1.0 mm, 3/64 inch

• Do not use pipes thinner than those specified above.

A Flare cutting dimensions

Flare tool for R410A
Clutch type
ø6.35, 1/4”| 0 – 0.5, 0 – 1/64
ø12.7, 1/2”| 0 – 0.5, 0 – 1/64

4.2. Connecting pipes (Fig. 4-1)

• When commercially available copper pipes are used, wrap liquid and gas pipes with commercially available insulation materials (heat-resistant to 100 °C, 212 °F or more, thickness of 12 mm, 1/2 inch or more).
• The indoor parts of the drain pipe should be wrapped with polyethylene foam insulation materials (specific gravity of 0.03, thickness of 9 mm, 23/64 inch or more).
• Flare the ends of the refrigerant pipes. A
• Apply refrigerating machine oil over the entire flare seat surface. B
• Use the flare nuts as follows. C
• For connection, first align the center, then tighten the first 3 to 4 turns of flare nut by hand.
• Use 2 wrenches to tighten piping connections. D
• Use refrigerant piping insulation provided to insulate indoor unit connections. Insulate carefully.
• After connecting the refrigerant piping to the indoor unit, be sure to test the pipe connections for gas leakage with nitrogen gas. (Check that there is no refrigerant leakage from the refrigerant piping to the indoor unit.)
• Use flared nut installed to this indoor unit.
• In case of reconnecting the refrigerant pipes after detaching, make the flared part of pipe re-fabricated.
  D Flare nut tightening torque

Copper pipe O.D. (mm, inch)| Flare nut O.D. (mm, inch)| Tightening torque (N·m, ft·lbs)
---|---|---
ø6.35, 1/4| 17, 43/64| 14 – 18, 10 – 13
ø12.7, 1/2| 28, 1-7/64| 49 – 61, 35 – 44

Warning:

• Be careful of flying flare nut! (Internally pressurized)
  Remove the flare nut as follows:
  1. Loosen the nut until you hear a hissing noise.
  2. Do not remove the nut until the gas has been completely released (i.e., hissing noise stops).
  3. Check that the gas has been completely released, and then remove the nut.

• When installing the unit, securely connect the refrigerant pipes before starting the compressor.

4.3. Positioning refrigerant and drain piping (Fig. 4-3)

• Indicates the condition with accessories mounted.
  A Gas pipe
  B Liquid pipe
  C Drain hose (Effective length: 500 mm, 19-11/16 inch)
  D Left-side piping knockout hole
  E Right-side piping knockout hole
  F Lower piping knockout hole
  G Mount board 1
  Installing the refrigerant piping

4.4. Refrigerant piping (Fig. 4-4)
Indoor unit

1. Remove the flare nut and cap of the indoor unit.
2.  Make a flare for the liquid pipe and gas pipe and apply refrigerating machine oil (available from your local supplier) to the flare sheet surface.
3. Quickly connect the on site cooling pipes to the unit.
4. Wrap the pipe cover that is attached to the gas pipe and make sure that the connection join is not visible.
5.  Wrap the pipe cover of the unit’s liquid pipe and make sure that it covers the insulation material of the on site liquid pipe.
6. The portion where the insulation material is joined is sealed by taping.
   A Site-side refrigerant piping
   B Unit side refrigerant piping

4.4.1. Storing in the piping space of the unit (Fig. 4-5)

1. Wrap the supplied felt tape in the range of the refrigerant piping which will be housed within the piping space of the unit to prevent dripping.
2. Overlap the felt tape at one-half of the tape width.
3.  Fasten the end portion of the wrapping with vinyl tape, etc.
   A Gas pipe
   B Liquid pipe
   C Indoor/outdoor connection cable
   D Felt tape 3

Drainage piping work

5.1. Drainage piping work (Fig. 5-1)

• Drain pipes should have an inclination of 1/100 or more.
• For extension of the drain pipe, use a soft hose (inner dia. 15 mm, 19/32 inch) available on the market or hard vinyl chloride pipe (VP-16/O.D. ø22 mm, 55/64 inch PVC TUBE). Make sure that there is no water leakage from the connections.
• Do not put the drain piping directly in a drainage ditch where sulphuric gas may be generated.
• When piping has been completed, check that water flows from the end of the drain pipe.

Caution:
The drain pipe should be installed according to this Installation Manual to ensure correct drainage. Thermal insulation of the drain pipes is necessary to prevent condensation. If the drain pipes are not properly installed and insulated, condensation may drip on the ceiling, floor or other possessions.
A Inclined downwards
B Must be lower than outlet point
C Water leakage
D Trapped drainage
E Air
F Wavy
G The end of drain pipe is under water.
H Drainage ditch
I 5 cm, 1-31/32 inch or less between the end of drain pipe and the ground.
J Drain hose
K Soft PVC hose (Inside diameter 15 mm, 19/32 inch) or
Hard PVC pipe (VP-16)

• Bond with PVC type adhesive
  Preparing left and left rear piping (Fig. 5-2)

  1. Remove the drain cap.
     • Remove the drain cap by holding the bit that sticks out at the end of the pipe and pulling.
     A Drain cap

  2. Remove the drain hose.
     • Remove the drain hose by holding on to the base of the hose a (shown by arrow) and pulling towards yourself b.

  3. Insert the drain cap.
     • Insert a screwdriver etc into the hole at the end of the pipe and be sure to push to the base of the drain cap.

  4. Insert the drain hose.
     • Push the drain hose until it is at the base of the drain box connection outlet.
     • Please make sure the drain hose hook is fastened properly over the extruding drain box connection outlet.
     B Hooks

Preparing left and left rear piping (Fig. 5-2)

1. Remove the drain cap.
   • Remove the drain cap by holding the bit that sticks out at the end of the pipe and pulling.
   A Drain cap

2. Remove the drain hose.
   • Remove the drain hose by holding on to the base of the hose a (shown by arrow) and pulling towards yourself b.

3.  Insert the drain cap.
   • Insert a screwdriver etc into the hole at the end of the pipe and be sure to push to the base of the drain cap.

4. Insert the drain hose.
   • Push the drain hose until it is at the base of the drain box connection outlet.
   • Please make sure the drain hose hook is fastened properly over the extruding drain box connection outlet.
   B Hooks Storing in the piping space of the indoor unit (Fig. 5-3)

♦ Storing in the piping space of the indoor unit (Fig. 5-3)

• When the drain hose will be routed indoors, be sure to wrap it with commercially available insulation.
• Gather the drain hose and the refrigerant piping together and wrap them with the supplied felt tape 3.
• Overlap the felt tape 3 at one-half of the tape width.
•  Fasten the end portion of the wrapping with vinyl tape, etc.

A Gas pipe
B Liquid pipe
C Drain hose
D Indoor/outdoor connection wiring
E Felt tape 3
♦ Check of drainage (Fig. 5-4)

1. Open the front grille and remove the filter.
2.  Facing the fins of the heat exchanger, slowly fill with water.
3.  After the drainage check, attach the filter and close the grille.

Electrical work <When wiring two indoor-outdoor connection cables>

• If the cables have the same diameter, insert them into the cut outs on both sides.
• If the cables have different diameters, insert them on one side into separate spaces with one cable positioned above the other.

6.1. Electric wiring
[Fig. 6-1]
Connection can be made without removing the front panel.

1. Open the front grille, remove the screw (2 pieces), and remove the electrical box cover.

• Electrical work can be conducted more effectively with the panel removed.
  When attaching the panel, check that the hooks K at three locations on the air outlet side are connected securely.

  2. Securely connect each wire to the terminal block.

• In consideration of servicing, provide extra length for each of the wires.

• Take care when using strand wires, because beards may cause the wiring to short out. 3.  Install the parts that were removed back to their original condition. 4.  When going through the right side of the indoor unit, cut out the removable section of the Corner box E.

A Front grille
B Fixing screw
C Electrical box cover
D Fixing screw
E Corner box
F Conduit plate
G Conduit cover
H Fixing screw
I Fixing screw
J Remote control cable
K Indoor-outdoor connection cable
L Ground wire
M Lock nut
N Conduit joint
O Conduit pipe
P Ground wire connection portion
Q MA remote control terminal block: (1, 2) do not have polarity
R Terminal block for indoor and outdoor units connection: S1, S2 and S3, have polarity
S Hook
Caution:
Wiring fo 5r remote controller cable shall be apart (5 cm, 1-31/32 inch or more) from power source wiring so that it is not influenced by electric noise from power source wiring. WARNING

• Connecting two wires on one side is prohibited.
• Connecting three wires or more to the same terminal is prohibited.
• Connecting wires with different diameters is prohibited.

When using a single cable, a round crimped terminal or other terminal work is prohibited.
6.1.1. Indoor unit power supplied from outdoor unit
The following connection patterns are available. The outdoor unit power supply patterns vary on models.1
1:1 System
A Outdoor unit power supply
B Wiring circuit breaker or isolating switch
C Outdoor unit
D Indoor unit/outdoor unit connecting cords
E Wired remote controller
F Indoor unit
G Indoor unit earth
H Indoor controller board
I Radio frequency interface for RF thermostat Only for 1:1 SystemA Outdoor unit power supply
B Earth leakage breaker
C Wiring circuit breaker or isolating switch
D Outdoor unit
E Indoor unit/outdoor unit connecting cables
F Remote controller
G Indoor unit

• Affix a label A that is included with the manuals near each wiring diagram for the indoor and outdoor units.
  Applied earth type depends on outdoor unit.
  Please refer to connected outdoor unit Installation Manual.
  Simultaneous twin system Only for wired remote controller.
  A Outdoor unit power supply
  B Wiring circuit breaker or isolating switch
  C Outdoor unit
  D Indoor unit/outdoor unit connecting cords
  E Wired remote controller
  F Indoor unit
  G Indoor unit earth
• Affix a label A that is included with the manuals near each wiring diagram for the indoor and outdoor units.

unshielded)
Circuit rating| Indoor unit-Outdoor unit S1-S2| 3| 208/230 VAC
Indoor unit-Outdoor unit S2-S3| 3 4| 24 V DC 128 V DC
Wired remote controller-Indoor unit| 3| 12 V DC

1. <For 12-36 outdoor unit application>
   Max. 45 m, 148 ft
   If AWG13 (2.5 mm²) used, Max. 50 m, 165 ft
   If AWG13 (2.5 mm²) used and S3 separated, Max. 80 m, 263 ft

2. Max. 500 m, 1640 ft
   (When using 2 remote controllers, the maximum wiring length for the remote controller cables is 200 m, 656 ft.)

3. The figures are NOT always against the ground.
   S3 terminal has 24 V DC / 28 V DC against S2 terminal. However, between S3 and S1, these terminals are not electrically insulated by the transformer or other device.

4. It depends on the outdoor unit.

Notes:

1. Wiring size must comply with the applicable local and national code.
2. Power supply cords and indoor unit/outdoor unit connecting cords shall not be lighter than polychloroprene sheathed flexible cord. (Design 60245 IEC 57)
3.  Use copper supply wires.
4.  Use UL wires rated 300 V or more for the power supply cords and the indoor unit/outdoor unit connecting cords.
5. Install an earth longer than other cords.
6. Indoor and outdoor connecting wires have polarities. Make sure to match the terminal number (S1, S2, S3) for correct wirings.
7. Wiring for remote controller cable shall be apart (5 cm, 2 inch or more) from power source wiring so that it is not influenced by electric noise from power source wiring.
8. This appliance incorporates an earth connection for functional purpose only.

Warning:
Never splice the power cable or the indoor-outdoor connection cable, otherwise it may result in a smoke, a fire or communication failure. 6.2. Function settings
6.2.1. By wired remote controller

1. (Fig. 6-4)
   • Select “Service” from the Main menu, and press the [SELECT/HOLD] button.
   • Select “Settings” from the Service menu, and press the [SELECT/HOLD] button.

2. (Fig. 6-5)
   • Select “Function settings” with the [SELECT/HOLD] button.

3. (Fig. 6-6)
   • Set the indoor unit refrigerant addresses and unit numbers with the [F1] through [F4] buttons, and then press the [SELECT/HOLD] button to confirm the current setting.
   < Checking the Indoor unit No.>
   When the [SELECT/HOLD] button is pressed, the target indoor unit will start fan operation. If the unit is common or when running all units, all indoor units for the selected refrigerant address will start fan operation.

4.  (Fig. 6-7)
   • When data collection from the indoor units is completed, the current settings appears highlighted. Non-highlighted items indicate that no function settings are made. Screen appearance varies depending on the “Unit No.” setting.

5. (Fig. 6-8)
   • Use the [F1] or [F2] button to move the cursor to select the mode number, and change the setting number with the [F3] or [F4] button.

6. (Fig. 6-9)
   • When the settings are completed, press the [SELECT/HOLD] button to send the setting data from the remote controller to the indoor units.
   • When the transmission is successfully completed, the screen will return to the Function setting screen.

Function table
Select unit number “Grp.”

Mode| Settings| Mode no.| Setting no.| Initial setting| Setting
---|---|---|---|---|---
Power failure automatic recovery| Not available| 1| 1| |
Available| 2| 0 *2|
Indoor temperature detecting| Indoor unit operating average| 2| 1| 0|
Set by indoor unit’s remote controller| 2| |
Remote controller’s internal sensor| 3| |
LOSSNAY connectivity| Not Supported| 3| 1| 0|
Supported (indoor unit is not equipped with outdoor-air intake)| 2| |
Supported (indoor unit is equipped with outdoor-air intake)| 3| |
Power voltage| 230 V| 4| 1| 0|
208 V| 2| |

Select unit numbers 1 to 4 or “All”

Mode| Settings| Mode no.| Setting no.| Initial setting| Setting
---|---|---|---|---|---
Filter sign| 100 Hr| 7| 1| 0|
2500 Hr| 2| |
No filter sign indicator| 3| |
Fan speed| Silent| 8| 1| |
Standard| 2| 0|
High ceiling| 3| |
Fan speed during the cooling thermostat is OFF| Setting fan speed| 27| 1| |
Stop| 2| |
Extra low| 3| 0|

1 When the power supply returns, the air conditioner will start 3 minutes later.
2 Power failure automatic recovery initial setting depends on the connecting outdoor unit. 6.3. CN24 settings (Mass save settings)
• Heat Pump auto ON/OFF setting depend on Outdoor temperature
• Heater via CN24 auto ON/OFF setting depend on Outdoor temperature or
difference between setting temp. and indoor ambient temperature.

1. (Fig.6-10)
   • Select “Service” from the Main menu, and press the [SELECT/HOLD] button.
   • Select “Settings” with the [F1] or [F2] button, and press the [SELECT/HOLD] button.

2. (Fig.6-11)
   • Select “CN24 settings” with the [F1] or [F2] button, and press the [SELECT/ HOLD] button.

3. (Fig.6-12)
   • Set the indoor unit refrigerant address with the [F1] or [F2] button, then press the [SELECT/HOLD] button.

4. (Fig.6-13, 6-14)
   • Select “Limit settings” or “CN24 ON condition” with the [F1] or [F2] button and press the [SELECT/HOLD] button.

5. (Fig.6-16, 6-18)
   • Set T(difference between ambient temp. and setting temp.) with [F3] or [F4] button and press the [SELECT/HOLD] button.

6. (Fig.6-15, 6-17)
   • Set UB, UA, LB, LA with [F3] or [F4] button and press the [SELECT/HOLD] button.

–
PUZ-HA**| 32°F — 70°F| 47°F| 23°F — 61°F| 38°F| -27°F — 52°F| –| -36°F — 43°F| –
SUZ-KA09/12/15/18/24/30/36NA2| 32°F — 70°F| 47°F| 23°F — 61°F| 38°F| 14°F — 52°F| –| 5°F — 43°F| –
SUZ-KA09/12/15/18/24/30/36NAHZ| 32°F — 70°F| 47°F| 23°F — 61°F| 38°F| 14°F — 52°F| –| 5°F — 43°F| –
MXZ| 32°F — 70°F| 47°F| 23°F — 61°F| 38°F| 14°F — 52°F| –| 5°F — 43°F| –

6.4. Rotation setting
You can set these functions by wired remote controller. (Maintenance monitor)

1. Select “Service” from the Main menu, and press the [SELECT/HOLD] button.

2. Select “Settings” with the [F1] or [F2] button, and press the [SELECT/HOLD] button.

3.  Select “Rotation setting” with the [F1] or [F2] button, and press the [SELECT/HOLD] button.

4. Set the rotation function.
   • Select “Rotation” with the [F1] button.
   • Select the switching period or “Backup only” with the [F2] or [F3] button. ■ “Rotation” setup options
   None, 1 day, 3 days, 5 days, 7 days, 14 days, 28 days, Backup only
   Notes:
   • When 1 to 28 days are selected from the setup options, the backup function is also enabled.
   • When “Backup only” is selected, the rotation function will be disabled. The systems with refrigerant addresses of 00 or 01 (00 system/ 01 system) will be operated as a main system while the 02 system is the standby mode as backup.

5. Set the support function.
   • Select “TempDifTrigger” with the [F1] button.
   • Select the difference between the suction temperature and the set temperature with the [F2] or [F3] button. ■ “TempDifTrigger” setup options
   None, +4ºC, +6ºC, +8ºC
   Notes:
   • The support function is available only in the COOL mode. (Not available in the HEAT, DRY and AUTO mode.)
   • The support function is enabled when any option other than “None” is selected from the “Rotation” setup options.

6. Press the [SELECT/HOLD] button to update the setting.

Reset method
• Press the [F4] button in step
4 or 5 to reset the operation time of the rotation function. Once it is reset, operation will start from the systems with refrigerant addresses of 00 or 01.
Note: When the system with refrigerant address of 02 is in the backup operation, the 00 or 01 systems will be operated again.

Test run

7.1. Before test run
► After completing installation and the wiring and piping of the indoor and outdoor units, check for refrigerant leakage, looseness in the power supply or control wiring, wrong polarity, and no disconnection of one phase in the supply.
► Use a 500-volt megohmmeter to check that the resistance between the power supply terminals and ground is at least 1.0 MΩ.
► Do not carry out this test on the control wiring (low voltage circuit) terminals.
Warning:
Do not use the air conditioner if the insulation resistance is less than 1.0 MΩ.
7.2. Test run
7.2.1. Using wired remote controller
■ Make sure to read operation manual before test run. (Especially items to secure safety)
Step 1 Turn on the power.

• Remote controller: The system will go into startup mode, and the remote controller power lamp (green) and “Please Wait” will blink. While the lamp and message are blinking, the remote controller cannot be operated. Wait until “Please Wait” is not displayed before operating the remote controller. After the power is turned on, “Please Wait” will be displayed for approximately 3 minutes.
• Indoor controller board: LED 1 will be lit up, LED 2 will be lit up (if the address is 0) or off (if the address is not 0), and LED 3 will blink.
• Outdoor controller board: LED 1 (green) and LED 2 (red) will be lit up. (After the startup mode of the system finishes, LED 2 will be turned off.) If the outdoor controller board uses a digital display, [- ] and [ -] will be displayed alternately every second.
  If the operations do not function correctly after the procedures in step 2 and thereafter are performed, the following causes should be considered and eliminated if they are found.
  (The symptoms below occur during the test run mode. “Startup” in the table means the LED display written above.)