9
8.
INSTALLING THE DUCT
Connect the duct supplied in the field.
Air inlet side
• Attach the duct and intake-side flange (field supply).
• Connect the flange to the main unit with accessory screws (in
20 or 24 positions).
• Wrap the intake-side flange and duct connection area with
aluminum tape or something similar to prevent air escaping.
CAUTION
When attaching a duct to the intake side, be sure to attach an
air filter inside the air passage on the intake side. (Use an air
filter whose dust collecting efficiency is at least 50% in a gravi-
metric technique.)
The included filter is not used when the intake duct is attached.
Air outlet side
• Connect the duct according to the air inside of the outlet-side
flange.
• Wrap the outlet-side flange and the duct connection area
with aluminum tape or something similar to prevent air
escaping.
CAUTION
• Be sure to insulate the duct to prevent condensation from form-
ing. (Material: glass wool or polyethylene foam, 1 in. thick)
• Use electric insulation between the duct and the wall when
using metal ducts to pass metal laths of the net or fence
shape or metal plating into wooden buildings.
• Be sure to explain about the way of maintaining and cleaning
local procurements (air filter, grille (both air outlet and suction
grille), etc.) to your customer.
9.
ELECTRIC WIRING WORK
9-1 GENERAL INSTRUCTIONS
• Shut off the power before doing any work.
• All field supplied parts and materials, electric works must
conform to local codes.
• Use copper wire only.
• See also the “Wiring Diagram label” attached to the control
box lid when laying electrical wiring.
• For details on hooking up the remote controller, refer to the
“REMOTE CONTROLLER INSTALLATION MANUAL”
• All wiring must be performed by an authorized electrician.
• This system consists of multiple indoor units. Mark each
indoor unit as unit A, unit B . . . , and be sure the terminal board
wiring to the outdoor unit and BS unit are properly matched. If
wiring and piping between the outdoor unit and an indoor unit
are mismatched, the system may cause a malfunction.
• Install a wiring interrupter or ground-fault circuit interrupter
for the power wiring.
• Make sure the ground resistance is no greater than 100
Ω
.
• To avoid short circuiting the power supply wire, be sure to use
insulated terminals.
• Do not turn on the power supply (wiring interrupter or ground-
fault circuit interrupter) until all other work is done.
DANGER
• Do not ground units to water pipes, telephone wires or light-
ning rods because incomplete grounding could cause a
severe shock hazard resulting in severe injury or death, and
to gas pipes because a gas leak could result in an explosion
which could lead to severe injury or death.
9-2 LIST OF STANDARD WIRING EQUIPMENT
NOTES
1. If the wiring is in a place where people it can be easily
touched by people, install a ground-fault circuit interrupter to
prevent electric shock.
2. When using a ground-fault circuit interrupter, make sure to
select one useful also to protection against overcurrent and
short-circuit.
When using a ground-fault circuit interrupter only for
grounding device, make sure to use a wiring interrupter
together.
• The length of the transmission wiring and remote controller
wiring are as follows.
Length of the transmission wiring and remote controller wiring
9-3 ELECTRICAL CHARACTERISTICS
MCA: Minimum Circuit Amps (A) MFA: Max. Fuse Amps (A)
KW: Fan motor output (kW)
FLA: Full Load Amps (A)
Connection screw (7)
(accessory)
(Field supply)
(Field supply)
(Field supply)
(Field supply)
Flange
Flange
Aluminum tape
Aluminum tape
Main unit
Insulation
material
Air inlet side
Air outlet side
Power supply wiring
(including ground wire)
Transmission wiring
Remote controller wiring
Field fuses
Size
Wire
Size
15A
Must comply with local
codes.
Sheathed wire
(2 wires)
AWG18 – 16
Outdoor unit – Indoor unit
Max. 3280 ft.
(Total wiring length: 6560 ft.)
Indoor unit – Remote controller
Max. 1640 ft.
Units
Power sup-
ply
Fan motor
Model
Hz Volts
Voltage
range
MCA
MFA
KW
FLA
07 · 09 · 12 type
60
208-
230
Min. 187
Max. 253
0.9
15
0.062
0.7
18 type
1.3
0.13
1.0
24 type
1.4
0.13
1.1
