Dimplex KSS 2508 AIV User manual

1
Installation and Operating Instructions
Split Air Conditioner for Wall Mounting
KSS 2508 AIV
KSS 3508 AIV
KSS 4508 AIV
Technical data .............................................................................................................................2
Energy efficiency .........................................................................................................................3
Checklist......................................................................................................................................4
Refrigeration plan ........................................................................................................................4
Safety regulations........................................................................................................................5
Device construction .....................................................................................................................6
Installation instructions ................................................................................................................7
Scope of supply...........................................................................................................................7
Minimum clearances....................................................................................................................8
Assembling the indoor unit ..........................................................................................................9
Assembling the outdoor unit......................................................................................................10
Refrigerant pipes .......................................................................................................................11
Connecting the refrigerant pipes on the outdoor unit.................................................................12
Electrical Connection.................................................................................................................13
Start-up......................................................................................................................................13
Important notes on operation.....................................................................................................14
Circuit diagram...........................................................................................................................15
Operation...................................................................................................................................18
Cleaning and maintenance........................................................................................................21
Faults.........................................................................................................................................22
Warranty, after-sales service.....................................................................................................23

2
Technical data
Split room conditioners
Indoor unit
Outdoor unit KSS 2508 AIV
KSS 2508 AIV I
KSS 2508 AIV A
KSS 3508 AIV
KSS 3508 AIV I
KSS 3508 AIV A
KSS 4508 AIV
KSS 4508 AIV I
KSS 4508 AIV A
Cooling capacity / heat output 1) kW 2.50 / 2.70 3.50 / 3.85 4.50 / 6.00
Air volumes, indoor unit m³/h 450 550 800
Connection voltage 1/N/PE ∼230 V
Nominal power consumption for cooling / heating kW 0.73 / 0.85 1.16 / 1.27 1.58 / 2.05
Sound power level, outdoor / indoor unit (approx.) db(A) 53 / 40 55 / 42 56 / 45
Refrigerant R 410A
Net weight outdoor / indoor unit kg 40 / 8.5 45 / 11 52 / 20
Dimensions, outdoor unit (W x H x D) mm 830 x 540 x 320 830 x 540 x 320 914 x 685 x 384
Dimensions, indoor unit (W x H x D) mm 770 x 250 x 180 830 x 285 x 189 1020 x 319 x 234
Condensate hose extension, indoor unit Required
inner hose diameter mm 17
Height difference indoor unit - outdoor
unitmaximum m 10
Length of refrigerant pipe, maximum m 20
Temperature range, cooling
Indoor unit (adjustable range) Upper operating limit +33 °C / lower operating limit +18 °C
Outdoor unit (fixed-setpoint conditions) Upper operating limit +43 °C / lower operating limit -10 °C
Temperature range, heating
Indoor unit (adjustable range) Upper operating limit +30 °C / lower operating limit +16 °C
Outdoor unit (fixed-setpoint conditions) Upper operating limit +43 °C / lower operating limit -15 °C
Length of plug cable, indoor unit m 1,5
Energy efficiency class cooling A B C
Energy efficiency value (cooling/heating) 3.42 / 2.64 3.02 / 2.73 2.93 / 2.85
Special accessories refrigerant pipe
consisting of an insulated suction and pressure pipe pre-filled with refrigerant and with coupling and electrical connecting
cable.
Pre-filled refrigerant pipes, length 2 m KMSL 1412-2 AIV
Assembly accessories
consisting of 2 brackets with dampeners for wall mounting of outdoor unit
Wall bracket WKS 357
Condensate pump accessory
consisting of float-type switch and separate pump
Condensate pump KSI 3100
Refrigerant pipes may be joined to extend them.
For refrigerant pipes longer than 8 metres, an on-site extension by the refrigeration technician is recommended.

3
Energy efficiency
Energy Room air conditioner
Manufacturer: Dimplex Dimplex Dimplex
Outdoor unit KSS 2508 AIV A KSS 3508 AIV A KSS 4508 AIV A
Indoor unit KSS 2508 AIV I KSS 3508 AIV I KSS 4508 AIV I
Low energy consumption
High energy consumption
Annual energy consumption 365 579 780
kWh in cooling mode
(Actual consumption depends on
usage of the device and cooling
conditions)
Cooling capacity kW 2.50 3.50 4.50
Energy efficiency value 3.42 3.02 2.93
At full load (the higher the better)
Type Cooling function only -
Cooling function / heating function - Yes Yes Yes
Air cooling - Yes Yes Yes
Water cooling -
Heat output kW 2.70 3.85 6.00
Energy efficiency class E E D
of heating function
A: Low energy consumption
G: High energy consumption
Noise
dB(A) re 1 pW
The brochures include a data sheet
with further information on the devices
Standard EN 14511
Room air conditioner
Energy Labelling Directive 2002/31/EC
A
B
C
Data for KSS 3508 AIV Data for KSS 4508 AIV Data for KSS 2508 AIV

4
Checklist
• Has a calculation of the cooling load been made?
• Is the cooling capacity of the device sufficient for the room to be cooled?
• Are the operating limits sufficient for the purpose for which the air conditioner is intended?
• Are the walls or the foundation for the installation of the outdoor unit strong enough?
• The indoor unit should be installed in a position where it ensures uniform cooling.
• Minimum clearances must be observed.
• Planning the installation of the outdoor unit:
consider noise emission and free air circulation,
avoid direct sunlight,
ensure unimpeded access to the component,
installation at locations without access by general public.
• Is a wall bracket required for the outdoor unit?
• Plan the power cable and connection; ensure adequate fuse protection.
• Check the maximum length and feasibility of the refrigerant pipes.
• Refrigerant pipes should be as straight and short as possible.
• When routing the refrigerant pipes, it is essential to maintain a bend radius of 3.5 x pipe diameter.
• Excess piping should be wound up at a downward angle to the outdoor unit
in order to avoid displacement of refrigerant oil.
• Take the height difference between indoor and outdoor unit into account.
• If the outdoor unit is installed higher than the indoor unit: provide an oil siphon every 3 vertical meters.
• Plan condensate drainage. If the condensate hose on the indoor unit cannot be routed with a downward slope,
a condensate pump must be provided. The condensate is always formed at the “ cold ” side of the air conditioner;
this means for cooling in the inner component and for heating in the outdoor unit.
• Is an approval by the local utility company required?
Refrigeration plan
Capillary
Collector
Damper
Compressor
4-way valve
Evaporator
Coupling
Condenser
Filter dryer
Filter dryer
Coupling

5
Safety regulations
General
• Please read these installation and operating instructions carefully and fully before commencing installation! They contain
important information about the assembly, use and maintenance as well as safety instructions to be observed!
• After unpacking the device, inspect it for any transport damage. In case of doubt, do not put the device into use but have it
examined by a qualified technician.
• Before connecting the device, please ensure that the mains supply network corresponds to that required by the device
according to the type plate data. Observe the utility company's local connection conditions.
• The room air conditioner must not be operated in rooms where highly inflammable substances are used (e.g. solvents, etc.).
• The device must be unplugged from the mains before any cleaning or maintenance work is carried out.
• This device may be used only for the purpose for which it was manufactured, i.e. for heating, cooling, dehumidification and
air recirculation of rooms. All other purposes are not those for which it was intended and must therefore be regarded as
hazardous.
• In the case of a fault and/or functional defect, please switch the device off (disconnect from the mains). Do not try to repair
the device yourself. Necessary repairs must be carried out by the after-sales service.
• The power supply cable may only be replaced by a qualified electrician.
• The manufacturer is not liable for damage caused by improper or incorrect use or the incorrect installation of the device.
Device-specific
• The device must be installed according to the manufacturer’s specifications. Incorrect setup can cause injury to persons or
animals and damage to property.
• Where possible, the outdoor unit is to be installed in such a way that it is not exposed to direct sunlight.
• The inlet and outlet vents of the air conditioner must not be covered or blocked.
• Do not insert any objects into the device openings.
• Disconnect the air conditioner from the power supply if the device is not operated for a longer period of time.
• The air conditioner should be inspected at regular intervals (e.g. before the cooling season).
• The condensate which collects in or runs out of the air conditioner should not be drunk.
• Do not operate the room air conditioner without an air filter.
• The air filters should be cleaned at regular intervals (depending on user and room).
• Do not place any objects on top of the air conditioner.
• The indoor unit of the air conditioner may be operated in dry rooms only.
• Do not pour or spray any liquids onto or into the air conditioner.
• Do not use hairsprays, solvents or similar materials (aerosols) in the vicinity of the air conditioner.
• The air conditioner should be switched off immediately in the case of a fault (e.g. if smoke is created or an unusual smell is
noticed). Disconnect the device from the power supply (switch off the fuse or pull out the plug) and contact an authorised
after-sales service.
• Keep persons with impaired health, small children and pets away from the direct air current since this may have a
detrimental effect on their health.
• The device may be assembled and disassembled only by a qualified technician.

6
Device construction
1 Indoor unit
2 Air inlet
3 Airflow fins (for adjustable air outlet direction)
4 Air outlet
5 Signal receiver (of the remote control) with indicator lamps
6 Mains connection cable on indoor unit
7 Outdoor unit
8 Air inlet
9 Air outlet
10 Connection lines indoor unit - outdoor unit
11 Condensate outflow hose

7
Installation instructions
Before choosing an air conditioner, we recommend carrying out a cooling load calculation according to the standard, or on the
basis of a relevant standard. Forms for cooling load calculation complete with instructions can be obtained from the
manufacturer or wholesaler or on the Internet at www.dimplex.de
Indoor or outdoor units, which are not installed according to instructions, may cause a reduction or loss of warranty in case of
repair!
Choosing the installation location
It is very important to install split devices in suitable locations as it is difficult, and thus expensive, to move them after installation.
If possible, decide on the installation location in agreement with the final customer. The installation site must be suitable for
bearing the weight and the operational vibration of the indoor or outdoor unit on a permanent basis.
Notes on the installation of the indoor unit
The circulating air should flow through the whole of the room to be cooled.
The flow of cold air should not be directed at persons or their place of work.
The condensation formed during cooling must be drained off without impairing functioning. If the condensate can only be led off
upwards or without a downward slope, then the installation of a condensate pump is necessary.
The component may not be installed in rooms subject to high humidity in which the device is in contact with moisture or water.
The device may not be installed in rooms in which oil vapour is emitted or could be emitted.
Notes on the installation of the outdoor unit
The outdoor unit should be installed in a place where it will not become soiled.
When there is a danger of condensate freezing (heating operation when outside temperatures are low), the condensate drain
stubs should be removed and additional insulation be provided for the drainage area. Freezing condensate (e.g. the formation of
ice on the heat exchanger) can impede the fan function of the outdoor unit.
The outdoor unit must be installed in compliance with the regulations regarding the assessment of operational noise in the
neighbourhood. In particular, a suitable distance from bedrooms and similar rooms should be maintained.
The device may not be installed in areas of aggressive air!
Scope of supply
Please check that the delivery is complete and that the devices are undamaged.
The scope of supply includes:
• Split air conditioner consisting of indoor and outdoor unit (2 packaging units in case of complete order),
• Mounting plate for wall mounting of the indoor unit, slotted into it (incl. screws)
• Remote control (incl. 2 batteries),
• Condensate drain plug for draining condensate in the outdoor unit,
• Control line with connection plug routed in the refrigerant pipe,
• Mains connection cable,
• Installation and operating instructions

8
Minimum clearances
A
ll dimensions in mm

9
Assembling the indoor unit
Installation instructions
Bends in the refrigerant pipes may not be positioned
immediately before or after refrigerant couplings!
If it does not matter whether the pipes are visible in the
room, they can be led out of the side of the indoor unit to
the left and routed through the wall at some other suitable
location.
Perforated sections are provided accordingly in the housing
area of the indoor unit.
Drilling through the wall
One opening in the wall with a minimum diameter of 80
mm is necessary for the passage of the condensation hose
as well as the refrigerant and electrical lines from the indoor
unit to the outdoor unit.
The opening must slope downward at an angle of about 5°
toward the outside wall to allow the condensate to drain.
Insert a bushing into the wall opening to prevent damage to
the lines!
The end of the condensate hose may not be stand in the
water.
The diagram below shows the recommended position for the wall opening depending on the minimum distances.
Ø=80
150 150
150
2000
80
60
Front view
A
B
KSS 2508 KSS 3508 KSS 4508
Maß A
Maß B
770
250
830
285
1020
310
Installation
- The mounting plate for the indoor unit must be aligned horizontally and mounted while observing the minimum clearances.
- Route the lines through the wall opening.
- Engage the indoor unit in the upper profiles of the mounting plate and swivel it downward
until the indoor unit engages.
Indoor unit
W
all
Downward slope
W
all mounting
min. 5°

10
Assembling the outdoor unit
Mount the outside component on a suitable support or wall with adequate load capacity.
The wall bracket WKS 357 is available as an accessory.
• The inflow and outflow of air must be unimpeded.
• An air short circuit must be avoided.
• Minimum clearances must be observed.
• Distances to bedrooms and third-party rooms should be selected as large as possible to avoid annoying noise.
See “ Technical Data ” for sound power levels.
D
CE
Distances between the drilling holes for mounting the outdoor unit. All dimensions in mm.
Type Dim. A Dim. B Dim. C Dim. D Dim. E
KSS 2508 AIV 288 320 540 760 70
KSS 3508 AIV 288 320 540 760 70
KSS 4508 AIV 342 384 550 844 70
Condensate drainage in the outdoor unit
During heating operation there is a formation of condensate which must be drained.
There is a hole (diam. 25) for condensate drainage in the base plate of the outdoor unit into which the condensate drainage plug
supplied can be inserted.
If the installation situation permits this, the condensate formed can drip down from the bottom side of the outdoor unit; otherwise
drainage must be provided by connecting a hose.
Caution!
• If possible, the drain house should not be fixed.
• If a condensate hose is is installed, it must always slope downwards.
The condensate may possibly freeze when heating below temperatures of +4 °C.
This may block the fan.
If temperatures below +4°C are to be expected at the condensate outlet during heating operation, appropriate measures, e.g.
insulation (insulation of the base of the casing and the condensate drainage area) should be taken.
Sealing the wall opening
This is not done until the outdoor unit has been installed and all necessary connections between the indoor and the outdoor unit
have been made.
The wall openings must be closed in a correct manner.
In the case of fire protection walls, the relevant regulations must be complied with.
Top view of outdoor unit