5 Installation
Installation and operation manual
7
250AXVEB
Split system air conditioners
3P580564-1 – 2019.04
5
Insulate the duct to prevent condensation from forming. Use
glass wool or polyethylene foam 25 mm thick.
a
b
c
b
a
f
f
e
e
d
d
a
Screws for duct flanges (accessory)
b
Flange (located on the unit)
c
Main unit
d
Insulation (field supply)
e
Canvas duct (field supply)
f
Aluminium tape (field supply)
▪
Filter.
Be sure to attach an air filter inside the air passage on the
intake side. Use an air filter with dust collecting efficiency ≥50%
(gravimetric method). The included filter is not used when the
intake duct is attached.
5.2
Connecting the refrigerant piping
DANGER: RISK OF BURNING
INFORMATION
▪ For
liquid piping
, use a flare connection.
▪ For
gas piping
, use the attached piping (accessory)
and fix it with the hexagon head bolts and spring
washers (accessory)
5.2.1
To connect the refrigerant piping to the
indoor unit
CAUTION
Install the refrigerant piping or components in a position
where they are unlikely to be exposed to any substance
which may corrode components containing refrigerant,
unless the components are constructed of materials that
are inherently resistant to corrosion or are suitably
protected against corrosion.
WARNING: FLAMMABLE MATERIAL
The R32 refrigerant (if applicable) in this unit is mildly
flammable. Refer to the outdoor unit specifications for the
type of refrigerant to be used.
▪
Pipe length
. Keep refrigerant piping as short as possible.
1
Connect the
liquid piping
to the unit using the flare
connections.
b
c
a
d
a
Field piping
b
Flare nut (attached to the unit)
c
Refrigerant pipe connection (attached to the unit)
d
Indoor unit
2
Connect the
gas piping
using the attached piping (accessory).
Fix it to the unit using hexagon head bolts (M10×40)
(accessory) and spring washers (accessory). Place sealing (on
the attached piping) between the connection.
b
d
a
f
c
e
a
Field piping
b
Hexagon head bolt (M10×40)
d
Attached piping
e
Sealing (on the attached piping)
f
Indoor unit
NOTICE
▪ Join the attached piping (accessory) and the field
refrigerant piping (field supply) by brazing before fixing
the attached piping to the unit.
▪ Do NOT braze the refrigerant piping directly to the
indoor unit.
CAUTION
Do NOT reuse sealing (on the attached piping). Always
use new sealing to prevent refrigerant gas leaks.
3
Insulate the refrigerant piping on the indoor unit as follows:
A
B
B
b
a
f
e
a a d
c
A
b
b a
a
a e f
A
Liquid piping
B
Gas piping
a
Insulation material (field supply)
b
Cable tie (field supply)
c
Attached piping (accessory)
d
Hexagon head bolt and spring washer (accessory)
e
Refrigerant pipe connection (attached to the unit)
f
Unit
NOTICE
Make sure to insulate all refrigerant piping. Any exposed
piping might cause condensation.
5.3
Connecting the electrical wiring
DANGER: RISK OF ELECTROCUTION
WARNING
ALWAYS use multicore cable for power supply cables.
WARNING
Use an all-pole disconnection type breaker with at least
3 mm between the contact point gaps that provide full
disconnection under overvoltage category III.
WARNING
If the supply cord is damaged, it MUST be replaced by the
manufacturer, its service agent or similarly qualified
persons in order to avoid a hazard.
WARNING
Prevent hazards due to inadvertent resetting of the thermal
cut-out: power to this appliance MUST NOT be supplied
through an external switching device, such as a timer, or
connected to a circuit that is regularly turned ON and OFF
by the utility.
