Saunier Duval SDH 31-026 NW User manual

ENG FLA
WALL-MOUNTED UNITS
Installation Manual
WALL-MOUNTED UNITS
SDH 31-026 NW
SDH 31-036 NW
SDH 31-050 NW
SDH 31-065 NW
2008

2
ENG
1- CONTENTS
1- Contents
...................................................................................................................................
2
2- Warnings
..................................................................................................................................
3
3- Operating limitations
...............................................................................................................
4
4- Dimensions
..............................................................................................................................
5
4.1- Indoor unit dimensions
............................................................................................................
5
4.2- Outdoor unit dimensions
.........................................................................................................
5
4.3- Installation layout
...................................................................................................................
6
5- Installation of the indoor unit
....................................................................................................
7
5.1- Planning the mounting site for the indoor unit
..........................................................................
7
5.2- Fitting the mounting plate and positioning the holes for the refrigerant pipes
...........................
7
5.3- Making the holes for the refrigerant pipe
..................................................................................
7
5.4- Connecting the refrigerant and condensed water pipes
...........................................................
8
5.4.1- Laying the rear piping
...........................................................................................................
5.4.1- Laying the rear piping ...........................................................................................................5.4.1- Laying the rear piping
8
5.4.2-
Laying the piping on the left / at the rear lef
.........................................................................
Laying the piping on the left / at the rear lef .........................................................................Laying the piping on the left / at the rear lef
8
5.4.3-
Laying the piping on the right / to the rear right
....................................................................
8
5.4.4- Installation of the indoor unit body
.......................................................................................
9
5.5- Discharging the condensed water from the indoor unit
............................................................
9
6- Installation of the outdoor unit
................................................................................................
11
6.1- Selecting the mounting site for the outdoor unit
.....................................................................
11
6.2- Connecting the refrigerant pipes
............................................................................................
11
6.3- Planning the refrigerant return
................................................................................................
11
6.4- Connecting the condensed water in the outdoor unit
..............................................................
12
6.5- Condensed water drainpipe
...................................................................................................
12
7-
Connecting the refrigerant pipes
..............................................................................................
13
7.1- D
irections on handling refrigerant pipes
.................................................................................
13
7.2- Cooling connections
..............................................................................................................
13
8- Power connection between the indoor and outdoor units
.........................................................
14
8.1- Power connection of the indoor unit
.......................................................................................
14
8.1.1- Removing the wiring cover
...................................................................................................
8.1.1- Removing the wiring cover ...................................................................................................8.1.1- Removing the wiring cover
14
8.1.2- Power connection with the indoor unit
.................................................................................
14
8.1.3- Power connection before mounting the indoor unit
..............................................................
14
8.2- Power connection of the outdoor unit
.....................................................................................
14
8.3- Power connection
..................................................................................................................
15
8.3.1- Power supply
.......................................................................................................................
15
8.4- Connection warnings
.............................................................................................................
15
9- Start up: purging and checking for leaks
..................................................................................
17
10-
Technical specifi cations
.........................................................................................................
19
11
-
Error codes
............................................................................................................................
20
11
.1-
SDH 31-026
NW / SDH 31-036 NW
........................................................................................
2
0
11
.2-
SDH 31-0
50
NW
/ SDH 31-065 NW
.........................................................................................
21

3
ENG
2- WARNINGS
In order to handle the air conditioner correctly, read
the following information carefully. Below is set forth
a series of safety warnings and advice:
These appliances should be installed and used in
accordance with the Regulations and Standards for
refrigerator, electrical and mechanical equipment
prevailing in relation to the location of such
installations.
As part of its policy for ongoing improvements of its
products, Saunier Duval reserves the right to modify
these specifi cations without prior notice.
Saunier Duval cannot foresee all the possible
circumstances that could pose a potential risk.
These units have been designed and manufactured
for the purposes of acclimatisation by means of air
conditioning; the use thereof for other domestic
or industrial purposes shall be the exclusive
responsibility of the persons projecting, installing or
using them in that way.
Prior to handling, installing, start up, using or
performing maintenance on the unit, the persons
assigned to perform these tasks should be familiar
with all the instructions and recommendations set
forth in the unit's installation manual.
In the event that any irregularity is detected (such as
a smell of smoke), unplug the unit from the mains
immediately and get in touch with the distributor in
order to proceed properly.
If you continue to use the
air conditioner in these irregular conditions, the unit
may be damaged, causing short circuiting or fi re.
Do not insert fi ngers or other objects into the air inlets
and outlets or swing llouvers in the unit whilst it is
running since the high speed of the fan could cause
injury.
Call a specialised technician in order to take measures
to prevent the refrigerant gas from leaking. Leaking
refrigerant of a certain density can cause oxygen
displacement. If the air conditioner is installed in
a small room, please ensure that the necessary
measures are taken to prevent any symptoms of
oxygen
defi ciency in the event of a refrigerant gas
leak.
If the air conditioner is removed and later reinstalled,
its proper installation should be checked again.
Otherwise water leakage, refrigerant leakage, short
circuiting or even fi re could be caused.
Do not dismantle the outdoor unit outlet. Exposing
the fan can be very dangerous.
The base of the unit should be checked regularly for
damage. If a damaged base is not repaired, it could
fall down and cause an accident.
Do not place any object on the outdoor unit.
Do not operate the unit with wet or damp hands as
there would be a risk of electrocution.
Only use the right fuses for each model. Do not use
wire or any other material to replace the fuse as this
could cause faults or fi re.
Do not place a naked fl ame in the unit's airfl ow. Do
not use sprays or other infl ammable gases close to
the unit as this would be a fi re hazard.
It is forbidden to install the air conditioner close to a
heat source, fl ammable or corrosive materials or the
air vent of a neighbouring building.
Unplug the unit from the mains before cleaning in
order to avoid short circuiting and possible injury.
Do not clean the unit with water.
Connect the earth cable to the right line (not to the
gas pipe, water pipe, neutral line or telephone line).
Incorrect earthing may cause electrical risk.
Connect the condensed pipe correctly to ensure
effi cient discharge. Incorrect pipe connection may
cause water leakage.
Install differentials to avoid possible short circuiting.
Do not leave the air conditioner running whilst using
insecticides and pesticides. Poisonous chemicals
may settle in the unit and harm the health of persons
with allergies to chemical substances.
Avoid prolonged exposure to cooled air or extreme
temperatures in a room. This could be a health
hazard.
Do not expose animals or plants directly to the unit's
airfl ow as this could be harmful.
The personnel in charge of receiving the unit should
perform a visual check to verify if the unit has been
damaged during transport.

4
ENG
2- WARNINGS
This air conditioner has been designed for the following temperatures. Operate it within these parameters.
CALEFACCIÓN
32ºC D.B.
3- OPERATING LIMITATIONS
C
OOLING
46°C D.B.
HEATING
Outdoor
Indoor
10°C D.B.
32°C D.B.
16°C D.B.
24°C D.B.
-15°C D.B.
32°C D.B.
16°C D.B.
Refrigerant installation should be performed using
pipes specifi cally designed for cooling (WARNING!
Never use plumbing material).
In order to ensure that its products maintain the
optimum functioning parameters, Saunier Duval
recommends that periodical maintenance checks be
performed by qualifi ed professionals. This service can
be rendered by Saunier Duval's Customer Services
Department, which will offer you a contract tailored
to your needs.
This equipment contains R-410A refrigerant. Do not
vent R-410A into atmosphere: R-410A, is a fl uorinated
greenhouse gas, covered by Kyoto Protocol, with a
Global Warming Potential (GWP) = 1975
The refrigerant fl uid contained in this equipment
must be properly recovered for recycling, reclamation
or destruction before the fi nal disposal of the
equipment.
The relevant personnel performing the maintenance
operations related with the handling of the refrigerant
fl uid must have the necessary certifi cation issued by
local authorities.
Your product has been marked with this symbol
This means that at the end of its useful life it
should not be mixed with other unclassifi ed
domestic waste and it should be disposed of in
compliance with the corresponding local and national
regulations, in a correct and environmentally-friendly
manner. This means that it is compulsory for the user
to ensure that the product is taken by an authorised
waste agent by local authorities, at the end of its
service life, for transport to a suitable treatment
plant. In the event that the product is removed to
be replaced by a new product for the same use, the
removed product can be submitted to the distributor
of th
e new device in order for this administrative
process to be undertaken accordingly.
Contact your local authorities for further details.

5
ENG
4- DIMENSIONS
4.1- INDOOR UNIT DIMENSIONS
Air inlet
Air outlet
4.2- OUTDOOR UNIT DIMENSIONS
Dimensions in mm
L
D
H
MODEL H L D
kg
SDH 31-026 NHWI
270 790 180 12
SDH 31-036
NHWI
270 790 180 12
SDH 31-050
NHWI
32
5
1.070 230 14
SDH 31-065
NHWI
32
0
1.020 210 14
Dimensions in mm
MODEL H L D
A
B C I J
A B C I J A
kg
SDH 31-026 NHWO
540 795 255 50 55 159 292 510 33
SDH 31-036
NHWO
540 795 255 50 55 159 292 510
40
SDH 31-050
NHWO
605 850 295 45 55 165
305 500 45
SDH 31-065
NHWO
605 850 295 45 55 165
305 500 50

6
ENG
4- DIMENSIONS
4.3- INSTALLATION LAYOUT
Figure 4.3
Over 10 cm
Over 5 cm
Over 10 cm
* The indoor unit should not be more
than 2m from the fl oor.
Over 10 cm
Over 10 cm
Over 60 cm
Over 15 cm

7
ENG
5- INSTALLATION OF THE INDOOR UNIT
1
As a general rule the indoor unit should be
installed close to the ceiling.
2
Bear in mind the minimum distances with
respect to the ceiling and the walls as set
forth in fi gure 4.3.
3
If a hole already exists in the wall or a
refrigerant pipe or condensed water pipe
has already been installed, the base
plate can be mounted to adjust to these
conditions.
5.2- FITTING THE MOUNTING PLATE AND POSITIONING THE HOLES FOR REFRIGERANT PIPES
5.3-
MAKING THE HOLES FOR THE REFRIGERANT PIPE
5.1
-
PLANNING THE MOUNTING SITE FOR THE INDOOR UNIT
1
Place the mounting plate on the wall in the
expected installation point.
2
Level the plate horizontally on the wall;
hold the plate in place provisionally using
a steel nail or marking the necessary holes
on the wall. On the mounting plate there
are several clips that can be used to fi x the
mounting plate.
3
Make sure once again that the plate is level
and that the holes are marked on the wall.
4
If the indoor unit is to be connected using
the refrigerant pipe in the rear, it will be
necessary to make a hole of the diameter
indicated in fi gure 5.3.
5
Take the measurements from fi gure 5.3
and mark the hole.
6
Place the base plate on the wall in the
expected installation point. Move the base
plate until the pipe hole lines up with the
forecast point on the mounting plate.
7
Do not forget that the plate has to be
properly levelled.
8
Ensure that the holes line up with the plate
clips.
9
Check that there are no domestic electricity
lines behind the spots in which the holes
are to be drilled.
10
Drill the holes and then screw on the
mounting plate using the screws and
rawplugs supplied.
4
Choose a mounting site that will allow
air to reach all parts of the room evenly.
Airfl ow should not be blocked by beams,
installations or lamps.
5
Do not install the indoor unit too close to
chairs or workstations in order to avoid
unpleasant draughts.
6
Do not locate the indoor unit close to heat
sources.
1
Drill a hole of the diameter indicated in
fi gure 5.3, slightly descending to outside
the wall.
2
Place the lid supplied for the hole in the
piping and insert the refrigerant pipes with
the condensed water pipe through the
hole. Seal the hole properly after installing
the pipes.
3
Bear the discharge requirements in mind
when making the hole in the pipe.
Figure 5.3

8
ENG
5- INSTALLATION OF THE INDOOR UNIT
5.4.1- Laying the rear piping
1
Lay the pipes and condensed water hose
and then secure them with heat-resistant
insulator.
5.4.2- Laying the piping on the left / at the
rear left
1
In the case of left side piping, carefully
break away the lid with a nippers.
2
In the case of left rear piping:
Carefully bend the installation pipe to the
right. (Warning: Do not fl atten the pipe!).
Cut the pipes, leaving enough extra piping
to enable the indoor unit to be hooked up
at the joins.
3
Do not forget to insert the nut before
drilling.
4
Drill the refrigerant pipe when installed.
5
Carefully remove the insulation of the
fl ared connection in the indoor unit.
6
Hang the indoor unit on the top edge of
the mounting plate.
7
Tilt the lower part of the indoor unit
forwards and insert a lever (e.g. a piece
of wood) between the mounting plate and
the unit, as shown in fi gure 5.4.2.
8
Connect the refrigerant pipes and
the condensed water hose to the
corresponding pipe and installation drain.
9
Insulate the refrigerant piping correctly. To
do so, cover any possible cuts with masking
tape or insulate any bare refrigerant piping
with the corresponding insulation material
used for cooling.
10
Ensure that each of the installation pipes
is properly insulated on a separate basis.
11
Insert the electrical cable from the rear of
the indoor unit through the specifi c hole
and pull it out.
5.4- CONNECTING THE REFRIGERANT AND CONDENSED WATER PIPES
Figure 5.4.2
A
D
B
C
Ref.
Description fi gure 5.4.3
A
Lid for right piping
B
Lid for indoor piping
C
Secure with adhesive tape
D
Lid for left piping
5.4.3- Laying the piping on the right / to the
rear right
1
In the case of right side piping, carefully
break away the lid with a nippers.
2
Carefully bend the indoor unit pipes to
the right or downwards in the desired
connection direction (Warning: Do not
fl atten the pipe!).
3
Do not forget to insert the nut before
drilling.
Figure 5.4.3

9
ENG
5- INSTALLATION OF THE INDOOR UNIT
4
Drill the refrigerant pipe when installed.
5
Carefully remove the insulation of the fl ared
connection in the indoor unit.
6
Hang the indoor unit on the top edge of
the mounting plate.
7
Tilt the lower part of the indoor unit
forwards and insert a lever (e.g. a piece
of wood) between the mounting plate and
the unit, as shown in fi gure 5.4.2.
8
Connect the refrigerant pipes and
the condensed water hose to the
corresponding pipe and installation drain.
9
Insulate the refrigerant piping correctly. To
do so, cover any possible cuts with masking
tape or insulate any bare refrigerant piping
with the corresponding insulation material
used for cooling.
10
Ensure that each of the installation pipes
is properly insulated and separated.
Insert the electrical cable from the rear of
the indoor unit through the specifi c hole
and pull it out. Connect the line in the
indoor unit terminal space according to
the corresponding connection layout.
11
Check that the cables are correctly secured
and connected. Then mount the wiring
cover.
12
After starting up the unit and performing
the trial, position the entire indoor unit as
described hereinafter. The connections in
the fl aring should be accessible so as to
test for water tightness.
13
Install the mounting plate, lining up the
holes with the help of the plate.
G
E
H
F
I
5.4.4- Installation of the indoor unit body
1
Before securing the indoor unit, ensure
that there are no leaks in the and the
installation has been done properly.
2
Securely hang the unit body onto the
upper notches of the mounting plate.
Briefl y move the body from side to side to
verify that it is secure.
3
Lift the body up slightly from underneath,
press it onto the mounting plate and then
lower it vertically. The body will fi t into the
lower supports on the mounting plate.
4
Then check that the indoor unit is properly
secured.
5
In the event that the body does not slot
into the supports properly, repeat this
process.
Ref.
Description fi gure 5.4.4
E
Heat-resistant material
F
Drain hose
G
Piping
H
Piping support plate
I
Indoor/outdoor electric cable
Figure 5.4.4
There are different ways of discharging the
condensed water generated by the indoor
unit.
1
Condensed water can be allowed to
discharge naturally, draining out together
with the refrigerant pipe. This can be made
to look visually attractive, e.g. using a
shared drain.
2
The condensed water pipe should slope
outwards from the indoor unit to ensure
no refl ux of water.
5.5-
DISCHARGING CONDENSED WATER FROM
THE INDOOR UNIT

10
ENG
1
Curved upward
and downward.
2
Hose end
submerged in
water.
3
Corrugated.
4
Distance to
ground too
short.
5
The end of the
hose close
to the water,
creating bad
smells that
can penetrate
into the room's
atmosphere.
5- INSTALLATION OF THE INDOOR UNIT
3
The unit can be tilted to allow the
condensed water to drain out naturally
from the indoor unit to a container (toilet,
sink, etc.). Different invisible installation
solutions also exist.
4
When the condensed water cannot be
drained out by fl owing naturally, it can be
pumped out using an external water pump
and channelled out through the house's
general drainage system.
5
The condensed water is channelled from
the indoor unit to a small collector deposit.
The condensed water pump receives a
signal from the water deposit when full.
The pump sucks up the condensed water
from the deposit and conveys it outside to
the drainage system.
6
This pump is available as an original
accessory, with the corresponding
installation instructions.
NOTES:
1
Always make sure that air circulates
through the condensed water pipe in
order to ensure that the water can be
freely released. Otherwise, the condensed
water could come out of the indoor unit
body.
2
Mount the pipe without bending it in order
to avoid obstructing the water.
3
If the water pipe is channelled outdoors,
ensure that it is insulated against
freezing.
4
In the event that the drainage hose is to be
located indoors, heat-resistant insulation
is required.
Figure 5.5.1
Figure 5.5.2
Figure 5.5.3
Figure 5.5.4
Figure 5.5.5
Less
Less
than 5 cm

11
ENG
6- INSTALLATION OF THE OUTDOOR UNIT
1
Outdoor units can only be mounted
outdoors, never inside a building.
2
If possible, select a mounting site that is
out of direct sunlight.
3
The ground of the mounting site must be
able to bear the weight of the outdoor unit
and allow it to fi t in horizontal position.
It should also be solid enough to avoid
vibrations.
4
The designated installation site should
comply with all the minimum distances
to neighbouring buildings in order to
guarantee the optimum performance of
the unit.
5
Make sure that air draughts or running
noises do not disturb neighbours.
6.1- SELECTING THE MOUNTING SITE FOR THE OUTDOOR UNIT
6
If the premises or dwelling is rented,
obtain the consent of the owner.
7
The mounting site should be free of gases
or infl ammable or easily combustible
substances and free from thick dust
formation.
8
Respect the minimum distances.
9
Bear in mind any local regulations when
selecting the site.
NOTE!
Las unidades exteriores deben ubicarse en
lugares accesibles para su mantenimiento y
reparación. Saunier Duval no se hará cargo
de cualquier coste derivado de un incorrecto
emplazamiento que impida el acceso sin
problemas.
6.2- CONNECTING THE REFRIGERANT PIPES
1
Mount the outdoor unit in the designated
site.
2
Remove the hoods from the refrigerant
joints in the outdoor unit.
3
Carefully bend the installed pipe towards
the outdoor unit. (Warning: Do not fl atten
the pipe!). Cut back the pipes, leaving
enough extra piping to enable the outdoor
unit to be hooked up at the joins.
4
Drill the refrigerant pipe when installed.
5
Join the refrigerant pipes to the
corresponding outdoor unit connection.
6
Insulate the refrigerant piping correctly. To
do so, cover any possible cuts with masking
tape or insulate any bare refrigerant piping
with the corresponding insulation material
used for cooling.
NOTE!
Installation is easier if the gas pipe is
connected up fi rst.
6.3- PLANNING THE REFRIGERANT RETURN
The refrigerant circuit contains a special
oil whose main purpose is to lubricate the
outdoor unit compressor. The ideal way to
have the oil return to the compressor is for the
indoor unit to be placed in a higher location
than the outdoor unit and the gas pipe to be
mounted at a tilt towards the compressor.
If the outdoor unit is mounted higher than the
indoor unit, the gas pipe (the thicker pipe)
should be mounted vertically. At heights of
over 7,5 m, an additional oil deposit or u-bend
should be installed at each 7,5 m interval to
collect the oil and vacuum it, returning it to
the outdoor unit. Moreover, a u-bend can be
installed in front of the outdoor unit to further
assist the oil return.

12
ENG
6- INSTALLATION OF THE OUTDOOR UNIT
NOTE!
Only in those units that have built-in heat
pumps.
1
Whilst the air conditioner is running,
condensation is formed and has to be
discharged.
2
The condensed water can be released from
the outdoor unit for example through the
drain elbow (1/2“) supplied - to a drainage
system or a waste pipe. The drain elbow
juts out from under the unit. Therefore it
is essential to ensure that suffi cient space
is left below the unit for the elbow to be
installed.
6.4- CONNECTING THE CONDENSED WATER IN THE OUTDOOR UNIT
3
Insert the splice elbow supplied into the
corresponding hole. This hole is located
on the bottom of the outdoor unit.
Turn the elbow 90° to secure it in place.
Conector de desagüe
1
Ensure that the condensed water drainpipe
juts out of the unit at a slant.
2
After connecting up the drainpipe, check
that it works by pouring in water from the
condensed water collection tray at the
bottom of the outdoor unit.
6.5- CONDENSED WATER DRAINPIPE
3
Since it is for use outdoors, the condensed
water drainpipe should be insulated
against freezing.
Figure 6.4
Hook it up to the drains

13
ENG
7- CONNECTING THE REFRIGERANT PIPES
1
Installation should be performed using
pipes specifi cally designed for cooling
(WARNING! Never use plumbing material).
2
Pipes should be clean, dry and polished
on the inside.
3
The insulation of the pipes should be
done using specifi c insulation for cooling
pipes.
4
Pipe lengths must respect the maximums
and minimums established at all times.
5
Avoid where possible curves in pipe
installations.
6
If soldering is required, it should be done
with strong soldering material made of a
copper-silver alloy. During the soldering
process a stream of dry nitrogen should
be run through the inside of the pipes in
order to avoid rusting.
7
Bear in mind that if the pipe is bent, losses
in load may occur. Try to keep the radius as
wide as possible.
7.1- DIRECTIONS ON HANDLING REFRIGERANT PIPES
8
Do not cut refrigerant pipes with a hack
saw but rather with a pipe saw and always
cover the pipe ends.
9
Any fl aring work should be performed
meticulously in order to avoid subsequently
losses of gas through the pipes.
10
When reaming, keep the pipe opening
directed downwards in order to prevent
shavings from getting into the pipes.
11
Mount the joining tubes carefully, ensuring
they cannot become displaced. Ensure
that traction will not occur between the
joins.
12
Equip the refrigerant pipes (gas and
liquid) separately and with high density
heat insulation.
13
The drill join should be tightened carefully.
Pressing too strongly without correctly
centering the fl ared cone and the plug
nut can damage the thread and cause
a reduction in the water tightness of the
unit.
7.2- COOLING CONNECTIONS
SDH 31-026 NW SDH 31-036 NW SDH 31-050 NW SDH 31-065 NW
Refrigerant R
410A (5m)
gr
1.100
1.100
1.450
1.550
Pipe diameters liq./gas
Ø
inches
1/4” - 3/8”
1/4” - 3/8”
1/4” - 1/2”
1/4” - 1/2”
Maximum pipe length
m
20
25
25
25
Maximum height IU below OU
m
10
15
15
15
Maximum height OU below IU
m
10
15
15
15
Standard load up to
m
5
5
5
5
Additional load per m
gr
30
30
50
50

14
ENG
8- POWER CONNECTION BETWEEN THE INDOOR AND OUTDOOR UNITS
8.1.1- Removing the wiring cover
1
Open the front lid on the indoor unit by
pulling upwards on it.
2
Remove the wiring cover on the right of the
body by unscrewing it.
8.1- POWER CONNECTION OF THE INDOOR UNIT
8.1.2- Power connection with the indoor unit
mounted
1
Insert the cable from outside through
the hole in the indoor unit where the
refrigerant pipe is already connected.
2
Throw the electrical cable from the rear of
the indoor unit through the specifi c hole in
the front. Connect the cables in the indoor
unit terminal space according to the
corresponding connection layout. Figure
8.3
3
Check that the cables are correctly secured
and connected. Then mount the wiring
cover.
8.1.3- Power connection before mounting the
indoor unit
1
In order to establish the power connection
of the indoor unit, the girth of the
refrigerant pipe body can also be used.
2
In the event that the electricity supply
comes from another part of the indoor unit
body, carefully break the lid with the aid of
a nippers.
3
Throw the electrical cable from the rear
of the indoor unit through the specifi c
hole in the front. Connect the line in the
indoor unit terminal space according to
the corresponding connection layout.
4
Check that the cables are correctly secured
and connected. Then mount the wiring
cover.
8.2- POWER CONNECTION OF THE OUTDOOR
UNIT
1
For the power connection of the outdoor
unit, proceed in the same way as for the
indoor unit.
2
Remove the protective covering in front of
the electrical connections in the outdoor
unit.
3
Remove the screws in the bushing block
and insert the power supply cable ends all
the way into it. Then tighten the screws.
4
Secure the cable installed in the outdoor
unit's contracting device.
5
Check that the cables are correctly secured
and connected. Then mount the wiring
cover.
NOTE!
Mount the power cable below the bushings
using a cable loop in order to avoid water
penetration.
Insulate the unused cable wires using
masking tape and ensure that they cannot
come into contact with low voltage parts.

15
ENG
8- POWER CONNECTION BETWEEN THE INDOOR AND OUTDOOR UNITS
8.3- POWER CONNECTION
8.3.1- Power supply
OUTDOOR UNIT
INDOOR UNIT
SDH 31-026 NW
SDH 31-036 NW
SDH
31
-0
26 NW
SDH
31
-0
3
6
NW
SDH
31
-0
50
NW
SDH
31
-0
65
NW
Voltage (V/Ph/Hz)
230/1/50
230/1/50
230/1/50
230/1/50
Supply
Supply section up to 25
meter (in mm
2
)
1,5
1,5
2,5
2,5
Indoor/Outdoor
Indoor
Indoor
Indoor
Indoor
Thermal-magnetic circuit
breaker, type D (A)
10
10
20
1
6
Interconnection section up to 25
meter (mm2)
1,5
1,5
2,5
2,5
Inteconnect Shield or not (YES/NO)
NO
NO
NO
NO
Immediatte residual current protector (A)
0,03
0,03
0,03
0,03
INDOOR UNIT
OUTDOOR UNIT
SDH 31-065 NW
SDH 31-050 NW
OUTDOOR UNIT
INDOOR UNIT

16
ENG
8- POWER CONNECTION BETWEEN THE INDOOR AND OUTDOOR UNITS
8.4- CONNECTION WARNINGS
1
If the mains cable is damaged, it must
be replaced by the manufacturer or an
approved dealer or a similarly qualifi ed
person.
2
If the fuse on the PC board is blown please
change it with type T. 3.15A/250V.
3
The wiring method should be in
accordance with the
respective national
and international wiring standards
corresponding to electrical installations.
NOTE!
When connecting the cable, check the
terminal number of indoor and outdoor units
off against the connection layout carefully.
If wiring is not correct, start-up failure may
occur and the air conditioner may not run
properly.
Mount the power cable below the bushings
using a cable loop in order to avoid water
penetration.
Insulate the unused cable wires using
masking tape and ensure that they cannot
come into contact with low voltage parts.
4
To ensure that this appliance complies
with EN 61000-3-11 standard, verify that
the service current supply capacity is
>100A at the interface point.
5
The electrical wiring must be properly
dimensioned. Installation sites are legally
required to be protected against short
circuiting to prevent electrical shock.
6
Power voltage should be in the range of
90%~110% of the rated voltage.
Remark on
89/336/EEC Directive
In order to prevent electromagnetic
interference during the start of the compressor,
the following installation conditions must be
adhered to.
1
The power connection for the air
conditioner has to be done at the main
power distribution. The distribution has
to be of a low impedance. Normally the
required impedance is reached at a 32 A
fusing point.
2
No other equipment has to be connected
with this power line.
3
For detailed information on
the electric
installation, please
consult the technical
connection
Conditions applied by your
electricity supply board.
4
For power details of the air conditioner,
refer to the rating plate of the product.

17
ENG
9- START UP: PURGING AND CHECKING FOR LEAKS
CHECKING FOR LEAKS
Connect a manometer bridge (faucets) to the gas pipe
service valve. Connect a nitrogen pump to the low-pressure
end of the manometer bridge. Carefully open the valves
corresponding to the service keys and set the system to the
pressure setting recommended on the table on the right,
depending on the cooling agent in use. Check that all the
connections and joints are watertight. If necessary, fi x any
connections or joints. After performing the pressure test,
close all the valves in the manometer bridge and remove
the nitrogen pump. Release the pressure from the system by
slowly opening the faucets.
Tu
bo
(
(
para refri
para refri
))
Ni
t
ó
ó
R-410A
40 bar(g) - 10/min
Nitrógeno
(for refrigerant)
Anti-refl ux join
Pipe (for refrigerant)
Pipe (for refrigerant)
Pipe (for refrigerant)
Tu
Pipe (for refrigerant)
Tu
bo
Pipe (for refrigerant)
bo
(
Pipe (for refrigerant)
(
para refri
Pipe (for refrigerant)
para refri
Pipe (for refrigerant)
Nitrogen
Gas
PURGING THE INSTALLATION
Connect the vacuum pump to the manometer bridge.
All faucets must remain shut!
Turn the vacuum pump on and open the vacuum valve and
the Low valve on the combined manometer. Then, the pump
will create a vacuum in the installation. Connect the vacuum
pump and open the vacuum valve and the “Low” valve and
the gas tap. Ensure that the “HIGH” valve is closed.
Tu
bo
(
para refr
i
erant
Leave the pump running for at least 15 minutes, depending
on the size of the unit. Check the needle in the low-pressure
manometer. It should read -0.1MPa (-76 cm Hg). After
fi nishing the process, close the Low valve on the manometer
bridge.
Disconnect the vacuum pump. Check the needle in the
manometer bridge for approximately 10 - 15 minutes. If the
pressure rises it means that the refrigerant circuit is not
watertight (this should have been detected during the leakage
check) In this case, all the joints, joins, indoor and outdoor
parts and technical service valves must be checked over.
Do not forget to then shut the faucets.
bierto
Pipe (for refrigerant)
Tu
Pipe (for refrigerant)
Tu
bo
Pipe (for refrigerant)
bo
(
Pipe (for refrigerant)
(
para refr
Pipe (for refrigerant)
para refr
i
Pipe (for refrigerant)
i
erant
Pipe (for refrigerant)
erant
Pipe (for refrigerant)
Anti-refl ux join
(for refrigerant)
Vacuum pump
(for refrigerant)
Gas
Open
Closed
According to Regulation 842/2006/EC, the complete refrigerant circuit must be periodically checked for
leakage. Take the necessary actions to ensure these tests are performed and the results correctly logged
into the maintenance record of the machine. The leakage test must be done with the following frequency:
Systems with less than 3 kg of refrigerant => periodic leakage test not needed
Systems with 3 kg or more of refrigerant => at least once every 12 months
Systems with 30 kg or more of refrigerant => at least once every 6 months
Systems with 300 kg or more of refrigerant => at least once every 3 months

18
ENG
9- START UP: PURGING AND CHECKING FOR LEAKS
START UP
Open the 2-way valve (gas) by twisting the rod 90°
anticlockwise. The installation will be fi lled with refrigerant.
Close the two-way valve (gas) after approximately 6 seconds.
Check the unit once again for water tightness.
Is there a gas leak?
If the answer is yes, check the fl ared connections in the unit.
If it has not been possible to stop the
refrigerant from discharging, empty
the unit using the vacuum pump.
To do so, you will need a vacuum
pump and a recycling bottle.
Never dump refrigerant into the
environment!
Check or repair the leaky join marked
in the pipe system. Replace any leaky
indoor and outdoor parts.
After the repair, fi ll the unit with the
correct amount of refrigerant, using a
specifi c scales.
Then, proceed to check for leakage as
described above.
Remove the manometer bridge.
Open the gas and liquid valves by twisting the rod
anticlockwise as far as it will go.
s
s
s
s
Close the gas and liquid valves using the the corresponding
protective lids.
Open
Gas
Liquid
Gas
Service hole
90º for 60 seconds
Gas
Open
90º
Valve
Valve
plunger lid
Valve
Valve
plunger lid
Service hole lid

19
ENG
10-
TECHNICAL SPECIFICATIONS
SDH 31-026
NW
SDH 31-036
NW
SDH 31-050
NW
SDH 31-065
NW
Power supply
V / Ph / Hz
230/1/50
Cooling Capacity
kW
2,75
3,81
5,53
6,53
A
bsorbed power
kW
0,75
1,05
1,50
1,99
Absorbed intensity
A
3,40
4,79
7,10
8,30
Heating Capacity
kW
3,19
4,13
5,98
7,10
Absorbed power
kW
0,80
1,15
1,64
2,21
Absorbed intensity
A
3,50
5,43
7,47
9,00
Indoor Unit
Air Flow
Nominal
m3/h
250
/400/570
250
/400/570
600/850/1000
500/650/850
Sound Power
dB(A)
46/53/58
46/53/58
48/55/60
55/59/65
Sound Pressure
dB(A)
33
/40/45
33
/40/45
35/42/46
42/50/53
Dimensions HxLxD
mm
270x790x180
270x790x180
325
x1070x
230
320x1020x210
Net Weight
Kg
12
12
14
14
Outdoor Unit
Air Flow
m
3
/h
1900
2500
2800
2.500
Sound power
level
Sound power levelSound power
dB(A)
64
64
65
65
Sound pressure level
dB(A)
51
51
52
54
Compressor type
Rotary
Expansion system
Capillary
Refrigerant
R410A
Refrigerant charge gr
1100
1230
1450
1.550
Dimensions H x L x D
mm
540x795x255
540x795x255
605
x850x
295
605x850x295
Net Weight
Kg
33
40
45
50
¡Note!
In application of its continuous product improvement policy, Saunier Duval reserves the right to
change any specifications without prior notice.

20
ENG
11-
ERROR CODES
Fault condition display
Fault name
Digital tube
F1
The communication faults in the indoor and outdoor units
F2
Internal temperature sensor faults
F3
Internal coil sensor faults
F4
PG motor faults
F5
IPM protection
F6
outdoor temperature sensor faults
F7
outdoor coil sensor faults
F9
exhaust sensor faults
FA
No load of the outdoor unit
FC
compressor starts failure
FF
Other indoor faults
FH
Read
EEPROM failure (indoor unit)
11
.1-
SDH 31-026
NW / SDH 31-036 NW
Protection condition display
Protection name
Digital tube
P1
Overload protection during heating or
Overload protection during cooling
P3
Over-current protection
P4
Exhaust overheat protection
P5
Overheat protection of the compressor cover
P7
Over-voltage or low-voltage protection
PA
Indoor coil low temperature protection during cooling
PC
Outdoor over-temperature protection
PF
The fl uorine is short or the reversing valve faults
PE
Read EEPROM failure (outdoor unit)