Page 1
Packaged Air-Conditioner Optional Parts
Base Heater
PAC-646BH-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.
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 classications for danger, and possible consequences following incorrect handling.
1 Accessories
This package includes the following parts besides this installation sheet.
Base heater 12 Heater support U 23 Heater support L 24 Heater plate 1
1
Cable tie 36 Fastener 27 Earth plate 18 Earth wire 2
5
Screw M4×8 80 Self-drilling screw 21 Spec label 12 Cable strap 2
9
WARNING
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.
Incorrect handling could lead to death or serious injury.
Incorrect handling could lead to injury or damage to house and household articles.
WARNING
Ask the dealer or specialist for installation.
• If installed incorrectly by user, water leak, electric shock, re, etc.
could result.
Use the provided parts and the specied parts for installation.
• Improper parts could cause electric shock, re, 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 re
caused by dust, water, etc.
Carefully install the optional parts according to this installation sheet.
• Incorrect installation could cause water leak, electric shock, re,
etc.
Use the specied 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 re.
CAUTION
Do not install the unit where ammable gas may exist or leak.
• If the ammable 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.
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 ns of
the heat exchanger. Wear protective equipment such as gloves
and the like in advance.
Preparation
2
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 Before installation
Before installation, follow the procedures below to remove some parts from the outdoor unit.
NOTE: Turn OFF power supply before disassembly.
1) Remove the screw xing the service panel.
2) Remove the service panel.
3) Remove the screws xing the top panel.
4) Remove the top panel.
5) Remove the screws xing the front panel.
6) Remove the front panel.
7) Remove the screws xing the back panel.
8) Remove the back panel.
9) Disconnect the connectors (CN791, CN792, CN712, CNTH2,
CNTH1, CN797, CN63H, CNF1, and relay connector), and
remove the electrical box.
10) Removal of propeller fan.
Remove the mounting screws for the propeller fan. Pull the
propeller fan toward you to remove it.
11) 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.
Top panel
Electrical box
Backpanel
12) Remove the rear guard.
Front panel
(Fig 1)
Propeller fan
Rear guard
Motor support
Service panel
BH79J668H01
Page 2
4 Preparation for mouting the base heater
1) Fix the heater support U 2 and L 3 to the base heater 1 with 2 screws M4×8 9 (2 places) as shown in the Fig 2.
(Place the heater supports as they t in the drain holes).
2) Fix an earth wire 8 to each heater support L 3 with screw M4×8 9.
Screw M4×8 9
Screw M4×8 9
Earth wire 8
Earth wire 8
6 Securing the lead wires
Wiring diagram
Connect the lead wires according to the wiring diagram
on the right.
[OUTDOOR
CONTROL P.C.
BOARD]
CN714
(BU)
BK
RD
YE
1
1
BK
BK
2
2
1
1
BASE HEATER
BK BK
BK BK
2
2
THERMAL
PROTECTOR
Heater
support U 2
Heater support L 3
Base heater 1
(Fig 2)
5 Installing the base heater
1) Hold the left lower side of the heat exchanger and slightly lift it up as
shown in the Fig 3.
2) Insert the base heater 1 under the heat exchanger, and align it with the
groove on the base. Conrm that the heater supports are placed as they
t in the drain holes.
3) Mount the motor support.
NOTES:
● Take out the earth wire to the left side of the motor support.
● Make sure that the lead wire is not caught between the bottom of the
motor support and the base.
4) Fix the front side of the base heater 1 with the heater plate 4.
Fix the heater plate 4 and motor support with the 2 screws that were
installed to x the motor support as shown in the Fig 4.
5) Screw the earth plate 7 on the motor support by self-drilling screw 0 as
shown in the Fig 5.
6) Fix the 2 earth wires 8 which are attached to the heater support to the
earth plate 7.
Drain hole
Base heater
Earth plate 7 location of installation
1) Bundle the lead wires of the base heater and
the fan motor together, and x 2 positions with
Hook in the notch
the cable ties 5.
● Secure the lead wires so they will not
interfere with the propeller fan.
● Hook the lead wire of the fan motor to the
hook on the motor support and the ditch.
2) Reinstall the rear guard.
3) Attach the 2 cable straps 2 on the separator as
shown in Fig 6.
● The holes to mount the cable straps 2 are
covered with aluminum tape.
Lead wire of
fan motor
Motor support
Hook in the notch
on the separator
Attaching positions
of the cable straps 2
Remove the tape before attaching the cable
straps 2.
4) Hook all the lead wires in the notch of the
Cable tie 5
Clamp
separator.
5) Secure the lead wire of the base heater with the
Hook
2 cable straps 2.
6) Secure other lead wires with 3 clamps on the
1
separator.
(Fig 6)
Cable straps 2
7) Reinstall the electrical box.
Reconnect the connectors.
8) Connect the lead wire of the base heater to the
connector CN714 on the controller circuit board
as show in the Fig 7.
(Fig 3)
9) Bundle all the connectors except CN791,
CN792, and relay connector with the fastener 6.
CN714
Align the center of
earth plate
the middle of guards.
7
with
7 After installation
Motor support
Screw ST
4×10
Heater plate
4
(Fig 4) (Fig 5)
Motor support
Screw M4×8 9
Self-drilling
screw
0
Earth
8
wire
Earth plate
1) Reinstall the propeller fan, back panel, front panel, top panel, and service
panel.
(Fig 7)
Fastener 6
2) Attach the spec label 1 below the spec name plate.
3) Turn on the breaker, and perform test run to conrm 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 the drain socket may freeze if the drain
Spec name plate
socket is installed.
Spec label 1
• Tighten the propeller fan with a torque of 3.4
0
N•m [2.5
-0.5
0
ft-lbs](34
-0.4
0
kgf•cm).
-5
• 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
WARNING
(Fig 8)
Mount the outer panels securely. Incomplete installation may result in electric shock and re caused by dust, water, etc.
BH79J668H01
Loading...