5 Installation
Installation and operation manual
8
FFA25~60A2VEB
Split system air conditioners
4P456960-1 – 2017.03
g
g
b
d
f
a
h
i e
e b
f
d c
P1
P2
TRAN
SM.
WIRI
N
G
F1
F2
OFF
FORCED
T1
T2
RC
a
Control box cover
b
Inter-unit wiring
c
Earth cable
d
Terminal block for power supply
e
Clamp
f
Terminal board for transmission wiring
g
Opening for cables
h
Wiring diagram label (on the back of the control box lid)
i
Remote controller wiring
2
Turn ON the power.
3
Start cooling operation (see
"7.4 To perform a test run" on
page 12
).
4
Gradually pour approximately 1 l of water through the air
discharge outlet, and check for leaks.
≥100 mm
e
d
c
b
a
a
Plastic watering can
b
Service drain outlet (with rubber plug). Use this outlet to
drain water from the drain pan.
c
Drain pump location
d
Drain pipe connection
e
Drain pipe
5
Turn OFF the power.
6
Disconnect the electrical wiring.
▪ Remove the control box cover.
▪ Disconnect the power supply and earth.
▪ Reattach the control box cover.
When electrical wiring is finished already
1
Start cooling operation (see
"7.4 To perform a test run" on
page 12
).
2
Gradually pour approximately 1 l of water through the air
discharge outlet, and check for leaks (see When electrical
wiring is not finished yet).
5.2
Connecting the refrigerant piping
DANGER: RISK OF BURNING
5.2.1
About connecting the refrigerant piping
Before connecting the refrigerant piping
Make sure the outdoor and indoor unit are mounted.
Typical workflow
Connecting the refrigerant piping involves:
▪ Connecting the refrigerant piping to the outdoor unit
▪ Connecting the refrigerant piping to the indoor unit
▪ Insulating the refrigerant piping
▪ Keeping in mind the guidelines for:
▪ Pipe bending
▪ Flaring pipe ends
▪ Brazing
▪ Using the stop valves
5.2.2
Precautions when connecting the
refrigerant piping
INFORMATION
Also read the precautions and requirements in the
following chapters:
▪ General safety precautions
▪ Preparation
DANGER: RISK OF BURNING
5.2.3
Guidelines when connecting the
refrigerant piping
Take the following guidelines into account when connecting pipes:
▪ Coat the flare inner surface with ether oil or ester oil when
connecting a flare nut. Tighten 3 or 4 turns by hand, before
tightening firmly.
▪ Always use 2 wrenches together when loosening a flare nut.
▪ Always use a spanner and torque wrench together to tighten the
flare nut when connecting the piping. This to prevent nut cracking
and leaks.
a
b
c
d
a
Torque wrench
b
Spanner
c
Piping union
d
Flare nut
