before installation 1. preparing for installation 2. installing the heater

SPLIT-TYPE AIR CONDITIONERS

OUTDOOR UNIT DEFROST HEATER

INSTALLATION MANuAL

Part No.

E12 A49 527

Description

HEATER ASSEMBLY (A09)

SG79V075H01

Specifications

Rated Voltage Electric Power

208 / 230 V 106 / 130 W

BEFORE INSTALLATION

The defrost heater prevents freezing of outdoor unit base. The base may freeze when the heating operation is performed for a long time in very low temperature, high humidity condition.

• Wear protective equipment such as gloves for your safety.

• Be careful not to cut your hands with the aluminum tape.

• Be careful not to wet electrical parts with water or snow during installation. Wet electrical parts could cause malfunction.

• Do not install the outdoor unit directly on the ground. Install the outdoor unit on a raised platform, such as on racks, to suppress freezing.

Components

Defrost heater

Aluminum tape

Heater support

1

1

1

Power P.C. board

Cable tie

Insulation

1

1

1

Self drilling screw

Wiring diagram

Spec label

2

1

1

1. PREPARING FOR INSTALLATION

(1) Make sure to switch off the power supply or turn off the breaker.

(2) Remove the top panel, front panel, service panel, motor support, and elect assy.

Elect assy

Top panel

THE FOLLOWING SHOuLD ALWAYS BE OBSERVED FOR SAFETY

• Be sure to read these safety precautions and instructions.

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

• After reading this manual, be sure to store it for future reference.

WARNING (Could lead to death, serious injury, etc.) n Do not install the unit by yourself (user).

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

n Ground the unit correctly.

Do not connect the ground to a gas pipe, water pipe, lightning rod, or telephone

ground. Defective grounding could cause electric shock.

n Be sure to use the parts provided or specified parts for the installation work.

Incomplete installation could cause fire, electric shock, or injury.

CAUTION (Could lead to serious injury in particular environments when operated incorrectly.) n Depending on the installation area, install a Ground Fault Interrupt (GFI) circuit breaker.

If the Ground Fault Interrupt (GFI) circuit breaker is not installed, an electric shock could occur.

4. FIXING THE WIRES

(1) Place the lead wires of the defrost heater , fan motor, and ambient temp. thermistor as shown in the figure below. Secure them with the cable tie .

If the lead wires slacken, there is a possibility that they touch the propeller fan. Be sure to secure the wires with the cable tie 5 for safety. Cut off the surplus of the cable tie .

(2) Apply the insulation on the place indicated in the figure below. Secure all the wires tightly with the clamp.

(3) Install the elect assy on the fixed place. Connect the lead wires from the defrost heater to CN722 on the power P.C. board .

Motor support

Service panel

Cable tie

Insulation

Front panel

2. INSTALLING THE HEATER

(1) Hold the left lower side of the heat exchanger, and slightly lift up the heat exchanger.

(2) Insert the defrost heater under the heat exchanger, and align it with the groove on the base.

After positioning the defrost heater , secure it to the base with the aluminum tape .

In order to fix the defrost heater to the base, fix the heater support to the base with 2 self drilling screws .

(3) Put the heat exchanger back in place, and install the motor support and the propeller fan.

(Refer to the figure below for details.)

Heat exchanger

Defrost heater

Aluminum tape

Heater support

Aluminum tape

Motor support

Clamp

Separator

Defrost heater

Aluminum tape

3. REPLACING THE POWER P.C. BOARD

(1) Replace the original power P.C. board with the power P.C. board . Refer to the original wiring diagram. Be careful not to make mis-wiring.

Fix heater support self drilling screws .

Heater support

Separator

Defrost heater

Clamp

5. AFTER INSTALLATION

(1) Attach the wiring diagram provided with this installation manual to the inner side of the top panel.

(2) Reinstall the front panel, top panel, and service panel.

(3) Attach the spec label by the spec name plate.

(4) Turn on the breaker, and perform test run to confirm that it works properly.

Do not install either drain socket which is provided with the outdoor unit or purchased separately.

Inside of the drain hose and/or drain socket may freeze if the drain socket is installed.

Original wiring diagram

Spec name plate

Spec label

Top panel

Wiring diagram

MSZ-A09.indd 1

HEAD OFFICE: TOKYO BLDG., 2-7-3, MARUNOUCHI, CHIYODA-KU, TOKYO

100-8310, JAPAN

2009/04/15 15:24:10