Mitsubishi Electric PAC-645BH-E Quick Start Manual

Before installation
• This product is designed for prevention of ice on the bottom of the outdoor unit heat exchanger and the clogged drain hole caused by
freezing in severe winter.
• To drain properly, a drain socket and a concentrated drain pan are not allowed to be used with this product.
SAFETY PRECAUTIONS
• Carefully read this section 'Safety Precautions', and securely install the optional parts.
• Be sure to observe the cautions described here: They include critical contents for safety.
• The following indications show the classifications for danger, and possible consequences following incorrect handling.
Incorrect handling could lead to death or serious injury.
WARNING
Incorrect handling could lead to injury or damage to house and household articles.
CAUTION
• After installation, perform a test run and make sure that there is no abnormality, and ask your customer to keep this installation sheet
with the installation manual at all times.
Also ask the customer to transfer these manuals to a new user if the user changes.
Ask the dealer or specialist for installation.
• If installed incorrectly by user, water leak, electric shock, fire, etc.
could result.
Use the provided parts and the specified parts for installation.
• Improper parts could cause electric shock, fire, water leak, and
injury caused by fall of the unit.
Mount the service panel on the outdoor unit securely.
• Incomplete installation may result in electric shock and fire caused
by dust, water, etc.
Do not install the unit where flammable gas may exist or leak.
• If the flammable gas should leak and accumulate around the unit,
explosion may result from it.
Install an earth leakage breaker.
• Failure to install an earth leakage breaker may result in electric
shock.
1 Accessories
This package includes the following parts besides this installation sheet.
1 base heater 1 2 heater guard* 1 3 screws 5×12
6 spec label 1 7 base heater support(1) 1 8 base heater support(2) 1 9 clamp
* Refer to
5 Mounting the heater guard
Packaged Air-Conditioner Optional Parts
Base Heater
PAC-645BH-E
WARNING
Carefully install the optional parts according to this
installation sheet.
• Incorrect installation could cause water leak, electric shock, fire,
etc.
Use the specified electric wires. Connect and fasten the
electric wires securely to the terminals so external force on
the wires will not apply on the terminals.
• Improper connections and fastening could cause fire.
CAUTION
Ground the unit correctly.
• Do not connect the ground wire to a gas pipe, a water pipe, a
lightning rod, or a telephone ground wire. Improper grounding
may cause electric shock.
The grounding is performed with your hands touching the fins of
the heat exchanger. Wear protective equipment such as gloves
and the like in advance.
2 5 fasteners
8 4 cable ties
1
2 Preparation
It is easier to mount the base heater before installing the outdoor unit.
• Make sure that the main power supply to the unit is OFF.
• Do not lose the removed screws. Many screws will be removed to install the base heater.
• Eliminate dust, dirt, etc.
3 Preparation for mounting the base heater
Before mounting the base heater, follow the procedures below to remove some parts from the outdoor unit.
NOTE: Turn OFF power supply before disassembly.
❶ Remove the screw fixing the service panel.
❷ Pull down the service panel and remove it.
❸ Remove the screws fixing the top panel.
❹ Remove the top panel.
❺ Remove the screws fixing the front panel.
❻ Remove the front panel.
❼ Removal of fan.
Remove the mounting screws for the fan. Pull the fan toward you to remove it.
❽ Removal of motor support.
Disconnect the connector of the fan motor, and remove mounting screw for the motor support. Slightly pull the motor support toward
you and lift it up to remove it.
4 Mounting the base heater
❶ Temporarily place the base heater 1 along the groove of
the base as shown in the photo below.
base heater 1 base heater 1
square hole for square hole for
motor support motor support
5 Mounting the heater guard
When you see the holes A as in the photo below,
install the heater guard 2.
A A
2
❷ Fix the base heater 1 with the base heater supports 7, 8
and the screws 5×12 3.
W Be careful not to damage the lead wire and surface of the
base heater with the edge of the sheet metal.
base heater 1 base heater 1
base heater base heater
support(1)7
support(1)⑦
screws
5×123
Hold the base heater ① with
the base heater support (2) ⑧
screws 5×123
at the two points.
base heater support (2)8 base heateer support(2)8
Position the base heater 1 as shown in the photo above.
Place the heater guard 2 as shown in the below photo.
Fix them with the screws 5×12 3.
<After installation of the heater guard 2>
heater guard2 heater guard7
screws
screws
5×12 3
5×12 3
BT79C423H01