Mitsubishi Electronics SEZ-A18, SEZ-A24AR, SEZ-A12 User Manual

Air-Conditioners

SEZ-A12, A18, A24AR

INSTALLATION MANUAL

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

FOR INSTALLER

English

Contents

1. Safety precautions ................................................................................... 2

2. Selecting the installation location ............................................................. 2

3. Installation diagram & Accessories .......................................................... 3

4. Indoor unit installation .............................................................................. 4

5. Refrigerant piping work ............................................................................ 5

6. Drainage piping work ............................................................................... 7

7. Electrical work .......................................................................................... 8

8. Duct work ............................................................................................... 10

1. Safety precautions

• Please report to or take consent by the supply authority before connection to the system.

• Be sure to read “The following should always be observed for safety” before installing the air conditioner.

• Be sure to observe the cautions specified here as they include important items related to safety.

• The indications and meanings are as follows. Warning:

Could lead to death, serious injury, etc.

Caution:

Could lead to serious injury in particular environments when operated incorrectly.

• After reading this manual, be sure to keep it together with the instruction manual in a handy place on the customer’s site.

Warning:

• Do not install it by yourself (customer).

Incomplete installation could cause injury due to fire, electric shock, the unit falling or leakage of water. Consult the dealer from whom you purchased the unit or special installer.

• Install the unit securely in a place which can bear the weight of the unit.

When installed in an insufficient strong place, the unit could fall causing injured.

• Use the specified wires to connect the indoor and outdoor units securely and

attach the wires firmly to the terminal board connecting sections so the stress of the wires is not applied to the sections. Incomplete connecting and fixing could cause fire.

• Do not use intermediate connection of the power cord or the extension cord

and do not connect many devices to one AC outlet. It could cause a fire or an electric shock due to defective contact, defective insulation, exceeding the permissible current, etc.

• Check that the refrigerant gas does not leak after installation has completed.

9. Air filter installation ................................................................................. 11

10. Test run .................................................................................................. 13

11. Maintenance .......................................................................................... 14

12. System control (Fig. 12-1) ...................................................................... 15

This Installation Manual describes only for the indoor unit and the connected outdoor unit of SUZ series. If the connected outdoor unit is MXZ series, refer to the Installation Manual for MXZ series.

: Indicates an action that must be avoided.

: Indicates that important instructions must be followed.

: Indicates a part which must be grounded.

: Indicates that caution should be taken with rotating parts.

: Indicates that the main switch must be turned off before servicing.

: Beware of electric shock.

: Beware of hot surface.

Warning:

Carefully read the labels affixed to the main unit.

• Perform the installation securely referring to the installation manual. Incomplete installation could cause a personal injury due to fire, electric shock, the unit falling or leakage of water.

• Perform electrical work according to the installation manual and be sure to use an exclusive circuit. If the capacity of the power circuit is insufficient or there is incomplete electrical work, it could result in a fire or an electric shock.

• Attach the electrical part cover to the indoor unit and the service panel to the outdoor unit securely. If the electrical part cover in the indoor unit and/or the service panel in the outdoor unit are not attached securely, it could result in a fire or an electric shock due to dust, water, etc.

• Be sure to use the part provided or specified parts for the installation work. The use of defective parts could cause an injury or leakage of water due to a fire, an electric shock, the unit falling, etc.

• Ventilate the room if refrigerant leaks during operation. If the refrigerant comes in contact with a flame, poisonous gases will be released.

Caution:

• Perform grounding. Do not connect the ground wire to a gas pipe, water pipe arrester or telephone ground wire. Defective grounding could cause an electric shock.

• Do not install the unit in a place where an inflammable gas leaks. If gas leaks and accumulates in the area surrounding the unit, it could cause an explosion.

• Install a ground leakage breaker depending on the installation place (where it is humid). If a ground leakage breaker is not installed, it could cause an electric shock.

2. Selecting the installation location

2.1. Indoor unit

• Where airflow is not blocked.

• Where cool air spreads over the entire room.

• Where it is not exposed to direct sunshine.

• At a distance 1 m or more away from your TV and radio (to prevent picture from being distorted or noise from being generated).

• In a place as far away as possible from fluorescent and incandescent lights (so the infrared remote control can operate the air conditioner normally).

2.2. Outdoor unit

• Where it is not exposed to strong wind.

• Where airflow is good and dustless.

• Where it is not exposed to rain and direct sunshine.

• Where neighbours are not annoyed by operation sound or hot air.

• Where rigid wall or support is available to prevent the increase of operation sound or vibration.

• Where there is no risk of combustible gas leakage.

• When installing the unit at a high level, be sure to fix the unit legs.

• Where it is at least 3 m away from the antenna of TV set or radio. (Otherwise, images would be disturbed or noise would be generated.)

• Perform the drainage/piping work securely according to the installation manual. If there is a defect in the drainage/piping work, water could drop from the unit and household goods could be wet and damaged.

• Fasten a flare nut with a torque wrench as specified in this manual. When fastened too tight, a flare nut may broken after a long period and cause a leakage of refrigerant.

• Where the air filter can be removed and replaced easily.

Warning: Mount the indoor unit into a ceiling strong enough to withstand the weight of the unit.

• Install the unit horizontally.

Caution: Avoid the following places for installation where air conditioner trouble is liable to occur.

• Where there is too much machine oil.

• Salty environment as seaside areas.

• Hot-spring areas.

• Where sulfide gas exists.

• Other special atmospheric areas.

3. Installation diagram & Accessories

42 930

7×100=700100

12.5 120

240

77.5 955

21525

1016

7×100=700

880

10040

(10)

350

680

1000

1070

150

450

150

600

700

(1070)

270

1100

2575

32.5

(10) 50

94 60

350

100

108

170

24012.5 120

25 215

77.5

100 7×100=700

955

93051

■ SEZ-A12/A18/A24AR

Air inlet (rear side) dimensions

9×2-ø2.9 holes

24-ø2.9 holes

20 or more

Air inlet (bottom side) dimensions

(mm)

PLATE (A)

24-ø2.9 holes

2×2-ø2.9 holes

Fig. 3-1

3.1. Indoor unit (Fig. 3-1)

1 Air inlet (rear side) *Select the either back side or bottom side 2 Electrical parts box 3 Suspension bolt pitch 5 Access door 6 Service space (It is necessary to maintain a working service area from the ceiling.) 7 Air inlet (bottom side) *Select the either back side or bottom side 8 Suspension bolt M10 or 3/8 (procure locally) 9 Air outlet duct flange 0 Air outlet A Refrigerant pipe (gas)

■ SUZ-A09/A12AR

■ SUZ-A18/A24AR

Fig. 3-2

B Refrigerant pipe (liquid) C Wiring entry D Terminal block E Drain plug R1 male F Air outlet duct flange G In case of bottom side suction, mount the PLATE (A) on the rear side. H After installation, remove the transportation suppor t PLATE (B). I PLATE (B) × 2 J Inlet size

3.2. Outdoor unit (Fig. 3-2)

Ventilation and service space

■ SUZ-A09/A12AR

A 100 mm or more B 350 mm or more C Basically open 100 mm or more without only obstruction in front and on both sides of the

unit.

D 200 mm or more (Open two sides of left, right, or rear side.)

■ SUZ-A18/A24AR

A 100 mm or more B 350 mm or more C 500 mm or more

When the piping is to be attached to a wall containing metals (tin plated) or metal netting, use a chemically treated wooden piece 20 mm or thicker between the wall and the piping or wrap 7 to 8 turns of insulation vinyl tape around the piping.

Units should be installed by licensed contractor accordingly to local code requirement.

3. Installation diagram & Accessories

350

1070

Fig. 3-3

4. Indoor unit installation

3.3. Checking the indoor unit accessories (Fig. 3-3)

Check that the indoor unit is equipped with the following parts and accessories:

A Refrigerant pipe parts

1 Pipe cover (for refrigerant piping joint)

Small diameter × 1 Large diameter × 1

2 Bands for temporary tightening of pipe cover × 4

B Remote controller parts

3 Parts contained in the cardboard box × 1

Check the contents and read the explanations provided.

C Air filter parts

4 Parts contained in the bag × 1

Check the contents and read the explanations provided.

Refrigerant and drainage pipe sizes

Model SEZ-A12AR SEZ-A18AR SEZ-A24AR

Refrigerant Liquid OD ø6.35 (1/4") OD ø6.35 (1/4") OD ø6.35 (1/4")

pipe Gas OD ø9.52(3/8") OD ø12.7 (1/2") OD ø15.88 (5/8")

Drainage pipe Hard PVC pipe : OD ø26 (1")

4.1. Suspension Structure (Give site of suspension strong structure.)

4.1.1. Wooden structure (Fig. 4-1)

• Select tie beam (one-story houses) or second-floor girder (two-story houses) as

reinforcement member.

• Use sturdy beams of at least 6 cm square for beam pitch of 90 cm or less or of at

least 9cm square for beam pitch of 90-180 cm.

A Ceiling B Rafter C Beam D Roof beam

Fig. 4-1

Fig. 4-2

Fig. 4-3

4.1.2. Ferro-concrete structures (Fig. 4-2)

Secure the suspension bolts using the method shown, or use steel or wooden hangers, etc. to install the suspension bolts.

E Use inserts rated at 100-150 kg each (procure locally) F Suspension bolts M10 (3/8") (procure locally) G Steel reinforcing rod

4.1.3. Installing the suspension bolts

• Check the pitch of the suspension bolts.

• Use the ø10 (3/8") suspension bolts (×4, procure locally).

• Adhere strictly to the length of the suspension bolts.

4.2. Suspending the unit (Fig. 4-3)

Direct suspension method:

Raise the unit and line it up with the suspension bolts, then secure it using both nuts.

a Air outlet b Air intake (selecting the either back side or bottom side.) c Washer (procure locally) d Nuts (procure locally) e Suspension bolts (procure locally)

4.3. Transportation support removal (Fig. 4-4)

After installation, completely remove the transportation support because this part should only be used during transportation.

A 3 screws B Transportation support

Fig. 4-4

5. Refrigerant piping work

Ø6.35

SEZ-A12:Ø9.52 SEZ-A18:Ø12.7 SEZ-A24:Ø15.88

(C)

(B)

(A)

5.1. Refrigerant pipe (Fig. 5-1)

Maximum difference between heights of indoor unit and outdoor unit, the length of refrigerant piping and the number of bends in piping are within limits shown below.

Fig. 5-1

Fig. 5-2

a Indoor unit b Outdoor unit

1 Indoor unit 2 Outdoor unit

Models (A) Pipe length (B) Height (C) Number of

SEZ-A12AR max. 20 m max. 12 m max. of 10 SEZ-A18AR max. 30 m max. 15 m max. of 10 SEZ-A24AR max. 30 m max. 15 m max. of 10

*1: Height difference limitations are binding regardless of which unit, indoor or out-

door, is positioned higher.

Avoid the following places for installation where air conditioner trouble is liable to occur.

• Where there is too much oil such as for machine or cooking.

• Salty environment as seaside areas.

• Hot-spring areas.

• Where sulfide gas exists.

• Other special atmospheric areas.

• This unit has flared connections on both indoor and outdoor sides. (Fig. 5-2)

• Refrigerant pipes are used to connect the indoor and outdoor units as shown in the

figure below.

• Insulate both refrigerant and drainage piping completely to prevent condensation.

• Refrigerant adjustment … If pipe length exceeds 7 m, additional refrigerant (R410A)

charge is required. (The outdoor unit is charged with refrigerant for 7 m pipe length.)

7 m

maximum

Exceeding

7 m

Pipe length

(one way) difference bends (one way)

No additional

charge required

Additional

charge required

Refrigerant

to be added

–

SEZ-A12AR:30g/m SEZ-A18AR:50g/m SEZ-A24AR:50g/m

Piping preparation

• Refrigerant pipes of 3, 5, 7, 10 and 15 m are available as optional items.

(1) Table below shows the specifications of pipes commercially available.

Outside diameter

Model

SEZ-A12AR

SEZ-A18AR

SEZ-A24AR

(2) Ensure that the 2 refrigerant pipes are well insulated to prevent condensation.

(3) Refrigerant pipe bending radius must be 10 cm or more.

Caution: Using careful insulation of specified thickness. Excessive thickness prevents storage behind the indoor unit and smaller thickness causes dew drippage.

Pipe

For liquid

For gas

For liquid

For gas

For liquid

For gas

mm inch

6.35 1/4

9.52 3/8

6.35 1/4

12.7 1/2

6.35 1/4

15.88 5/8

Min wall

thickness

0.8 mm

1.0 mm

Insulation thickness

8 mm 8 mm 8 mm 8 mm 8 mm 8 mm

Insulation

material

Heat resisting

foam plastic

0.045 specific gravity

+ 11 hidden pages