-
30
-
F
• Be sure to
confirm
no operation
problem
on the
equipmen
t after
comple
ting the installation. If unusual
• Be sure to explain the operating
methods
as well as the
maintenance
methods
of this
equipment
to the
• Be sure to keep the installation
manual
together with user’s
manual
at a place where it is easily accessi-
ble to the user any time. Moreove
r
, ask the user to hand the manuals to a new use
r
, whenever required.
• During pump down work, be sure to stop the compressor before closing ser-
If the connecting pipes are removed when the compressor is in operation and service valves are
open, air can be sucked into the refrigerant circuit which can cause anomalous high pressure result-
• In the event of refrigerant leakage during installation, be sure to ventilate the
• Electrical work must be carried out by the qualified electrician, strictly in ac-
• Make sure that earth leakage breaker and circuit breaker of appropriate ca-
Circuit breaker should be able to disconnect all poles under over current. Absence of appropriate
• Be sure to switch off the power source in the event of installation, mainte-
If the power source is not switched off, there is a risk of electric shock, unit failure or personal injury.
• Be sure to tighten the cables securely in terminal block and relieve the ca-
re.
• Do not process, splice or modify the power cable, or share the socket with
Improper power cable or power plug can cause fire or electric shock due to poor connection, insuf-
• Do not perform any change in protective device or its setup condition yourself.
• Be sure to clamp the cables properly so that they do not touch any internal
Improper installation can cause electric shock or fire due to intrusion of dust or water.
• Be sure to use the prescribed power and connecting cables for electrical work.
• This appliance must be connected to main power source by means of a cir-
cuit breaker or switch with a contact separation of at least 3mm.
When plugging this unit, a plug conforming to the standard IEC60884-1 must be
• Be sure to connect the power source cable with power source properly.
Improper connection can cause intrusion of dust or water resulting in electric shock or fire.
• There is any obstacle which can prevent smooth air circulation from inlet and outlet side of the unit.
• Chemical substances like ammonia (organic fertilizer), calcium chloride (snow melting agent) and
omponents, unit malfunction and fire.
Aluminium fin temperature is high during heating operation. Touching fin can cause burn.
Do not touch any refrigerant pipe with your hands when the system is in operation.
During operation the refrigerant pipes become extremely hot or extremely cold depending on the op-
disconnect switch on the power source wiring in accor-
2. OUTDOOR UNIT INSTALLATION
Note as a unit designed for R32
• Do not use any refrigerant other than R32. R32 will rise to pressure about 1.6
times
higher than that of
a conventional refrigerant.
A
cylinder containing R32 has a light blue indication mark on the top.
• Do not use a charge cyli
nde
r. The use of a charge cyl
ind
er will cause the refrigerant co
m
position to
change, which results in performance degradation.
•
In charging refrigerant, always take it out from a cylinder in the liquid phase.
•
All indoor units must be models designed exclusively for R32. Check connectable indoor unit models in
a catalog, etc. (A
wrong indoor unit, if connected into the system, will impair proper system operation)
1. Haulage
•
Always carry or move the unit with two or more persons.
• The right
hand
s
ide
of the unit as
viewed
from
the front (outlet
side) is heavie
r.
A person carrying the right
hand
side
must
take care of this fact.
A person carrying the left han
d
sid
e
m
ust hol
d
the han
d
le pro-
vided
on the front panel of the unit with his right
hand
and
the
corner column section of the unit with his left hand.
CAUTION
When a unit is hauled, take care of its gravity center position which is shifted towards right hand side.
If the unit is not hauled properl
y, it can go of
f balance and fall resulting in serious injur
y.
2. Selecting the installation location
Select the suitable installation location where:
.
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•
(sulfurous acid etc.), which can harm the unit, will not generate or accumulate.
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mosphere.
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ments.
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H
•
NOTE
If the unit is
installed
in the area where there is a possibility of strong
wind
or snow
accumulation,
the fol-
lowing measures are required.
(1) Location of strong wind
•
Place the unit with its outlet side facing the wall.
•
Place the unit such that the direction of air from
the outlet gets perpendicular to the wind direc-
tion.
Over
500mm
Wind
direction
Wind
directi
on
(2) Location of snow accumulation
• Install the unit on the base so that the
bottom
is
higher than snow cover surface.
• Insta
ll the unit unde
r ea
v
es or pro
vide the
roof on
site.
3. Installation space
• There
mus
t be 1
me
ter or larger space between the unit
and
the wall in at least 1 of the 4
sides
.
Walls
surrounding
the unit
from
4
sides
is not acceptable. The wall height on the outlet
side
should
be 1200 mm or less. Refer to the following fi
gure and table for details.
(mm)
NOTE
When
more
than one unit are
installed
side
by
side,
provide
a
250mm
or
wider
interval
between
them
as a service space.
CAUTION
When more than one unit are installed in parallel directions, provide suffi
cient inlet space so that short-
circuiting may not occu
r.
4. Drain piping work (If necessary)
Carry
out
drain
piping work by using a
drain
elbow
and
a
drain
grommet
supplied
separately as acces-
sories if condensed water needs to be drained out.
(1) Install drain elbow and drain grommet.
.l
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o
r
a
l
a
e
S
)
2
(
<SRC20/25/35/40/50/60ZSX-W>
Do not put a grommet on this hole.
This is a supplementary drain hole to discharge
drain
water,
when a large amoun
t of it
is gathered
.
CAUTION
Do not use drain elbow and drain grommet if there
is a possibility to have several consecutive days
of sub zero temperature. (There is a risk of drain
water freezing inside and blocking the drain.)
<SRC20/25/35ZSX-
W
A>
Do not block the drain holes when installing the
outdoor unit.
5. Installation
.
e
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e
li
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W
•
below.
The protrusion of an anchor bolt from the foundation surface must be kept within 15mm.
313mm
15mm
Anchor bolt (M10-12) ×4 pcs.
200mm over
If drain piping work was carried
out, keep the clearance more
than 100mm.
510mm
CAUTION
•
Install the unit properly so that it does not fall over during earthquake, strong wind, etc.
•
Make sure that unit is installed on a fl
at level base. Installing unit on uneven base may result in unit
malfunction.
3. PREPARATION FOR WORK
1. Removing service cover
Remove the scre
w
. Slide service cover downwards and remove it.
2. Removing terminal cover
Remove the screw and take out terminal cove
r.
Heavy
RWC012A063B
Model SRC20,25,35,40,50,60ZSX-W
SRC20,25,35ZSX-WA
R32 REFRIGERANT USED
V
acuum pump adapter*
(Anti-reverse flow type)
Designed
specifically
for R32 or R410A
Screw
Service cove
r
Screw
Terminal cove
r
Example installation
I
II
III
IV
Size
L1
Open
280
280
180
L2
100
75
Open Open
L3
100
80
80
80
L4
250
Open
250
Open
Inlet
(
Service
space
)
Inlet
Outlet
L3
L4
L1
L2
’20
・
SRF-DB-310D
-
29
-
F
• This installation manual deals with an outdoor unit installation only. For an indoor unit installation, refer to page 30.
SAFETY PRECAUTIONS
-
a
ll
a
t
s
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ll
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T
U
A
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P
Y
T
E
F
A
S
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e
h
t
d
a
e
r
,
n
o
it
a
ll
a
t
s
n
i
e
r
o
f
e
B
•
tion work in order to protect yourself.
,
s
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e
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o
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o
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s
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a
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it
u
a
c
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r
p
e
h
T
•
WARNING
and
CAUTION
.
WARNING
-
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s
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tl
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s
e
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a
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,
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v
a
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o
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f
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,
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w
n
o
it
a
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ti
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s
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o
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a
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y
ll
a
it
n
e
t
o
p
a
s
e
t
a
c
i
d
n
I
sequences such as death or severe injury.
CAUTION
-
n
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l
a
n
o
s
r
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p
n
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tl
u
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e
r
n
a
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a
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y
ll
a
it
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t
o
p
a
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e
t
a
c
i
d
n
I
jury or property damage.
.
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m
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b
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a
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p
o
o
n
m
r
fi
n
o
c
o
t
e
r
u
s
e
B
•
noise can be heard during the test run, consult the dealer.
e
h
t
o
t
t
n
e
m
p
i
u
q
e
s
i
h
t
f
o
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it
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p
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h
t
n
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a
l
p
x
e
o
t
e
r
u
s
e
B
•
user according to the user’s manual.
-i
s
s
e
c
c
a
y
li
s
a
e
s
i
ti
e
r
e
h
w
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k
o
t
e
r
u
s
e
B
•
ble to the user any time. Moreover, ask the user to hand the manuals to a new user, whenever required.
WARNING
• Be sure to use only for residential purpose.
If this unit is installed in inferior environment such as machine shop, vehicle (like ship), warehouse,
etc., it can malfunction.
-
r
o
c
c
a
n
i
y
l
e
t
e
l
p
m
o
c
r
e
ll
a
t
s
n
i
d
e
fi
il
a
u
q
e
h
t
y
b
t
u
o
d
e
ir
r
a
c
e
b
t
s
u
m
n
o
it
a
ll
a
t
s
n
I
•
dance with the installation manual.
Installation by non qualified person or incorrect installation can cause serious troubles such as water
leak, electric shock, fire and personal injury.
•
.
k
r
o
w
n
o
it
a
ll
a
t
s
n
i
g
n
i
m
r
o
fr
e
p
e
li
h
w
s
e
v
o
l
g
d
n
a
s
e
l
g
g
o
g
e
v
it
c
e
t
o
r
p
r
a
e
w
o
t
e
r
u
s
e
B
Improper safety measures can result in personal injury.
.
n
o
it
a
ll
a
t
s
n
i
e
h
t
r
o
f
s
t
n
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n
o
p
m
o
c
d
e
fi
i
c
e
p
s
e
h
t
d
n
a
s
e
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o
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U
•
Using parts other than those prescribed may cause water leak, electric shock, fire and personal injury.
• Do not install the unit near the location where leakage of fl ammable gases can occur.
If leaked gases accumulate around the unit, it can cause fire resulting in property damage and per-
sonal injury.
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W
•
does not exceed the limit (Reference: ISO5149) in the event of leakage.
If refrigerant density exceeds the limit, consult the dealer and install the ventilation system.
Otherwise lack of oxygen can occur resulting in serious accident.
• Install the unit in a location where unit will remain stable, horizontal and free
of any vibration transmission.
Unsuitable installation location can cause the unit to fall resulting in material damage and personal injury.
.
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•
Touching rotating equipments, hot surfaces or high voltage parts can cause personal injury due to
entrapment, burn or electric shock.
.
2
3
R
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h
T
•
Using any other refrigerant can cause unit failure and personal injury.
.
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a
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i
2
3
R
t
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•
R32 is a fluorinated greenhouse gas with a Global Warming Potential(GWP)=675.
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k
a
M
•
and removed.
If air enters the refrigerant circuit, the pressure in the refrigerant circuit will become too high, which
can cause burst and personal injury.
.
A
0
1
4
R
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2
3
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u
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t
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u
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e
B
•
Using existing parts (for R22 or R407C) can cause refrigerant circuit burst resulting in unit failure and
personal injury.
-
p
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r
u
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e
B
•
erating the compressor.
Do not open the liquid and gas service valves before completing piping
work, and evacuation.
If the compressor is operated when connecting pipes are not connected and service valves are
open, air can be sucked into the refrigerant circuit which can cause anomalous high pressure result-
ing in burst or personal injury.
.
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it
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B
•
Tightening flare nuts with excess torque can cause burst and refrigerant leakage after a long period.
-
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k
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p
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ir
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D
•
vice valves and removing connecting pipes.
If the connecting pipes are removed when the compressor is in operation and service valves are
open, air can be sucked into the refrigerant circuit which can cause anomalous high pressure result-
ing in burst or personal injury.
e
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I
•
working area properly.
If the refrigerant comes into contact with naked fl ames, poisonous gases will be produced.
-
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k
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l
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E
•
cordance with national or regional electricity regulations.
Incorrect installation can cause electric shock, fire or personal injury.
-
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k
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M
•
pacities are installed.
Circuit breaker should be able to disconnect all poles under over current. Absence of appropriate
breakers can cause electric shock, personal injury or property damage.
-
e
t
n
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a
m
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t
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r
u
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e
B
•
nance or service.
If the power source is not switched off, there is a risk of electric shock, unit failure or personal injury.
-
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g
it
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r
u
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e
B
•
bles properly to prevent overloading the terminal blocks.
Loose connections or cable mountings can cause anomalous heat production or fi re.
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D
•
other power plugs.
Improper power cable or power plug can cause fi re or electric shock due to poor connection, insuf-
ficient insulation or over-current.
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r
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D
•
Changing protective device specifications can cause electric shock, fire or burst.
l
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B
•
component of the unit.
If cables touch any internal component, it can cause overheating and fi re.
.
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B
•
Improper installation can cause electric shock or fire due to intrusion of dust or water.
.
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B
•
Using improper cables can cause electric leak or fire.
-
ri
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c
n
a
il
p
p
a
s
i
h
T
•
cuit breaker or switch with a contact separation of at least 3mm.
Improper electrical work can cause unit failure or personal injury.
•
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1
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8
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C
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used.
Using improper plug can cause electric shock or fi re.
.
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B
•
Improper connection can cause intrusion of dust or water resulting in electric shock or fire.
CAUTION
.
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T
•
If the unit weight is more than 20kg, it must be carried by two or more persons.
.
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n
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D
•
can inhabit.
Insects and small animals can enter the electrical parts and cause damage resulting in fi re or per-
sonal injury. Instruct the user to keep the surroundings clean.
e
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•
for installation, maintenance and service.
Insufficient space can result in personal injury due to falling from the height.
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D
•
noise or air generating from the unit.
It can affect surrounding environment and cause a claim.
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t
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D
•
gases (like sulphide gas, chloride gas), sea breeze or salty atmosphere.
It can cause corrosion of heat exchanger and damage to plastic parts.
c
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D
•
waves and/or high-harmonic waves.
Equipment such as inverters, standby generators, medical high frequency equipments and telecom-
munication equipments can affect the system, and cause malfunctions and breakdowns.
st
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function or cause jamming.
:
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.ti
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d
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•
acid (sulfurous acid etc.), which can harm the unit, will generate or accumulate.
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•
It can cause performance degradation, corrosion and damage of components, unit malfunction and fi re.
.
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•
Packing materials contain nails and wood which can cause personal injury.
.
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•
Object may fall causing property damage or personal injury.
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•
Aluminium fin temperature is high during heating operation. Touching fi n can cause burn.
•
.
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D
During operation the refrigerant pipes become extremely hot or extremely cold depending on the op-
erating condition. Touching pipes can cause personal injury like burn (hot/cold).
r
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t
a
l
o
s
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ll
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•
or disconnect switch on the power source wiring in accor-
dance with the local codes and regulations.
The isolator should be locked in OFF state in accordance with EN60204-1.
2. OUTDOOR UNIT INSTALLATION
Note as a unit designed for R32
• Do not use any refrigerant other than R32. R32 will rise to pressure about 1.6 times higher than that of
a conventional refrigerant. A cylinder containing R32 has a light blue indication mark on the top.
• Do not use a charge cylinder. The use of a charge cylinder will cause the refrigerant composition to
change, which results in performance degradation.
• In charging refrigerant, always take it out from a cylinder in the liquid phase.
• All indoor units must be models designed exclusively for R32. Check connectable indoor unit models in
a catalog, etc. (A wrong indoor unit, if connected into the system, will impair proper system operation)
1. Haulage
• Always carry or move the unit with two or more persons.
• The right hand side of the unit as viewed from the front (outlet
side) is heavier.
A person carrying the right hand side must take care of this fact.
A person carrying the left hand side must hold the handle pro-
vided on the front panel of the unit with his right hand and the
corner column section of the unit with his left hand.
CAUTION
When a unit is hauled, take care of its gravity center position which is shifted towards right hand side.
If the unit is not hauled properly, it can go off balance and fall resulting in serious injury.
2. Selecting the installation location
Select the suitable installation location where:
• Unit will be stable, horizontal and free of any vibration transmission.
• There is no obstacle which can prevent smooth air circulation from inlet and outlet side of the unit.
• There is enough space for service and maintenance of unit.
• Neighbours are not bothered by noise or air generating from the unit.
• Outlet air of the unit does not blow directly to animals or plants.
• Drain water can be discharged properly.
•
There is no risk of flammable gas leakage.
• There are no other heat sources nearby.
• Unit is not directly exposed to rain or sunlight.
• Unit is not directly exposed to oil mist and steam.
• Chemical substances like ammonia (organic fertilizer), calcium chloride (snow melting agent) and acid
(sulfurous acid etc.), which can harm the unit, will not generate or accumulate.
• Unit is not directly exposed to corrosive gases (like sulphide gas, chloride gas), sea breeze or salty at-
mosphere.
• No TV set or radio receiver is placed within 1m.
• Unit is not affected by electromagnetic waves and/or high-harmonic waves generated by other equip-
ments.
• Strong wind does not blow against the unit outlet.
• Heavy snowfalls do not occur (If installed, provide proper protection to avoid snow accumulation).
NOTE
If the unit is installed in the area where there is a possibility of strong wind or snow accumulation, the fol-
lowing measures are required.
(1) Location of strong wind
• Place the unit with its outlet side facing the wall.
Over 500mm
(2) Location of snow accumulation
• Install the unit on the base so that the bottom is
higher than snow cover surface.
• Install the unit under eaves or provide the roof on
site.
3. PREPARATION FOR WORK
1. Removing service cover
Remove the screw. Slide service cover downwards and remove it.
RWC012A063B
Model SRC20,25,35,40,50,60ZSX-W
SRC20,25,35ZSX-WA
R32 REFRIGERANT USED
1. ACCESSORIES AND TOOLS
Locally procured parts
Tools for installation work
(a) Anchor bolt(M10-M12)×4 pcs.
Plus headed driver
Spanner wrench
Vacuum pump*
(b) Putty
Knife
Torque wrench [14.0-62.0N•m(1.4-6.2kgf•m)]
Gauge manifold *
(c) Electrical tape
Saw
Wrench key (Hexagon) [4mm]
Charge hose *
*Not included for SRC20, 25, or 35ZSX-WA. (d) Connecting pipe
Tape measure
Flaring tool set *
Vacuum pump adapter*
(Anti-reverse
fl
ow type)
(e) Connecting cable
(f) Power cable
Pipe cutter
Flare adjustment gauge
Gas leak detector *
(g) Clamp and screw (for
fi
nishing work)
*Designed speci
fi
cally for R32 or R410A
Standard accessories
(Supplied with outdoor unit)
Q’ty
(1) Drain grommet
4
(2) Drain elbow
1
’20
・
SRF-DB-310D
'20 • SRF-DB-310
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