Mitsubishi Electric PAC-645BH-E User manual

Packaged Air-Conditioner Optional Parts
Base Heater
PAC-645BH-E
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.
square hole for
motor support
base heater 1
square hole for
motor support
base heater 1
AA
screws
5×12 3
screws
5×12 3
heater guard7heater guard2
screws 5×123
screws
5×123
base heateer support(2)8
base heater support (2)8
Hold the base heater ①with
the base heater support (2) ⑧
at the two points.
base heater
support(1)⑦
base heater
support(1)7
base heater 1base heater 1
• 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 classications for danger, and possible consequences following incorrect handling.
Incorrect handling could lead to death or serious injury.
Incorrect handling could lead to injury or damage to house and household articles.
• 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.
• If installed incorrectly by user, water leak, electric shock, re, etc.
could result.
Ask the dealer or specialist for installation.
• Incorrect installation could cause water leak, electric shock, re,
etc.
Carefully install the optional parts according to this
installation sheet.
• Improper parts could cause electric shock, re, water leak, and
injury caused by fall of the unit.
Use the provided parts and the specied parts for installation.
WARNING
WARNING
• Improper connections and fastening could cause re.
Use the specied electric wires. Connect and fasten the
electric wires securely to the terminals so external force on
the wires will not apply on the terminals.
• Incomplete installation may result in electric shock and re caused
by dust, water, etc.
Mount the service panel on the outdoor unit securely.
• Failure to install an earth leakage breaker may result in electric
shock.
Install an earth leakage breaker.
• If the ammable gas should leak and accumulate around the unit,
explosion may result from it.
Do not install the unit where ammable gas may exist or leak.
CAUTION
CAUTION
• 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 ns of
the heat exchanger. Wear protective equipment such as gloves
and the like in advance.
Ground the unit correctly.
1 Accessories
2 Preparation
3 Preparation for mounting the base heater
1
base heater 1
2
heater guard*
13
screws 5×12
84
cable ties
25
fasteners
2
6
spec label
17
base heater support(1) 18 base heater support(2) 19 clamp
1
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.
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 xing the service panel.
❷ Pull down the service panel and remove it.
❸ Remove the screws xing the top panel.
❹ Remove the top panel.
❺ Remove the screws xing 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.
BT79C423H01
SAFETY PRECAUTIONS
* Refer to
4 Mounting the base heater
❶ Temporarily place the base heater 1 along the groove of
the base as shown in the photo below.
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.
5 Mounting the heater guard
5 Mounting the heater guard
When you see the holes A as in the photo below,
install the heater guard 2.
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>
Position the base heater 1 as shown in the photo above.
This package includes the following parts besides this installation sheet.

8 Attaching the spec label
9 Reinstallation
Connect the lead wires according to the wiring diagram on the right.
Attach the spec label 6 by the spec name plate on the service panel.
Make sure that the installation of the base heater and connections of the lead wires have been completed according to this installation sheet.
Install the removed parts in the reverse order of removal.
• Tighten the propeller fan with a torque of 5.7±0.3N•m[4.2±0.2ft-lbs](57±3kgf•cm).
• Rotate the propeller fan and make sure that the base heater and the lead wires do not interfere with the movement of propeller fan.
7 Securing the lead wires
CN714
(BLU)
[Control board]1
2
1
2
1
2
1
2
BLK
YLW
RED
BASE HEATER
BLK
BLK
BLK BLK
BLK BLK
THERMAL
PROTECTOR
spec label 6
spec name plate
AA
(Continued from previous page) (Continued from left page)
1
2
1
1
cable tie4cable tie4
2
2
2
1
2
2
3
Bundle the lead
wires together
using the fastener 5.
Bundle the lead
wires together
using the fastener 5.
connector of the base heater [CN714(BLU)]
3
< In case of UNIT size H1048 o W950 o D330 > ∙∙∙ B
❶Fix the clamp 9 on the right side of the motor support with screw 5o123.
❷Bundle the lead wires of the base heater and the fan motor together with clamps.
• Secure the lead wires so they will not interfere with the propeller fan.
❸Pass the lead wires through the rubber parts hole on the metal parts of the electrical box toward the electrical box.
W
Arrange the lead wires so that they do not touch the service panel.
7 Securing the lead wires
< In case of UNIT size H796 o W950 o D330 > ∙∙∙ A
❶Bundle the lead wires of the base heater and the fan motor together with clamps.
• Secure the lead wires so they will not interfere with the propeller fan.
❷Pass the lead wires through the rubber parts hole on the metal parts of the electrical box toward the electrical box.
W
Fix the lead wires between the motor support and the rubber parts hole with the cable ties
4
.
❸After connecting the lead wires, bundle the extra lead wires together and secure them with the fastener 5.
W
Arrange the lead wires so that they do not touch the service panel.
Wiring diagram
Mount the outer panels securely. Incomplete installation may result in electric shock and re caused by dust, water, etc.
BT79C423H01
6 Mounting the motor support
Mount the motor support.
• Make sure that the lead wire is not caught between the bottom of the motor support and the base.
When the holes A are covered as in the right photo, do not install
the heater guard 2.
WARNING
W This is an example picture.
A
B
5 Mounting the heater guard
connector of the base heater [CN714(BLU)]