REMKO RKS 435H User manual

Edition GB – S08
REMKO RKS
RKS 435H, RKS 448H
Combination indoor units
Operation · Technology · Spare parts

Content
Made by REMKO
This operating manual must be read carefully before initial
operation / using the equipment
This manual is part of the unit and must always be stored in the
immediate vicinity of the installation location or on the unit itself.
Subject to change; no liability accepted for mistakes and printing errors.
Safety instructions 4
Environmental protection and recycling 4
Guarantee 4
Transport and packaging 5
Unit description 5
Combinations 5
Operation 6
Shutting down 6
Care and maintenance 6
Troubleshooting 7
Assembly instructions for specialist personnel 8-10
Installation 10-11
Leak tests 11
Condensation connection 12
Electrical connection 12-14
Before initial operation 15
Initial operation 15-16
Unit dimensions 16
Technical data 17
Unit illustrations 18
Spare parts list 19
Notes 19
3

Safety instructions
Read the operating manual
thoroughly before initial opera-
tion of the unit. It contains usefulIt contains usefulIt contains useful
hints , instructions and warning
notices to avert risks to personnel
and equipment . Failure to followFailure to followFailure to follow
the instructions in the manual can
result in hazards to personnel, the
environment and the system and to
forfeiture of any guarantee claims.
 Store this operating manual close
to the units.
 The units and components may
only be set up and installed by
specialist personnel.
 The units must be set up, con-
nected and operated under the
operating conditions set out in
the manual and must comply
with applicable regional regula-
tions.
 The units for mobile use must be
set up on vertically on a suit-
able surface where it is safe to
operate. Units for stationaryUnits for stationaryUnits for stationary
operation must only be operated
when installed in a fixed loca-
tion.
 Alterations or modifications to
the units or components sup-
plied by REMKO are not permit-
ted and can cause malfunctions.
 The units and components may
not be operated in areas with an
increased risk of damage. TheTheThe
minimum clearances must be
observed.
 The electrical power supply must
be tailored to the requirements
of the units.
 Safe and reliable operation of the
units and components is only
guaranteed by proper use and
when completely assembled and
installed. Safety equipment maySafety equipment maySafety equipment may
not be modified or bypassed.
 Operation of units or compo-
nents with visible defects or
damage must be prevented.
 All housing sections and open-
ings in the unit, e.g. air inlets
and outlets, must be free of for-
eign objects, liquids and gases.
 The units and components must
be a sufficient safe distance
from flammable, explosive,
combustible, aggressive or con-
taminated areas or atmospheres.
 Touching certain parts of the
unit or components can result in
burns or other injury.
 Installation, repairs and mainte-
nance may only be carried out
by authorised specialist per-
sonnel; visual inspections and
cleaning can be performed by
the operator when disconnected
from the power supply.
 During installation, repair, main-
tenance or cleaning of the units,
appropriate precautions must be
taken to rule out any hazards to
personnel caused by the unit.
 The units and components must
not be exposed to mechani-
cal loads, extreme humidity or
direct sunlight.
Disposal of packaging
All products are carefully packaged
in environmentally friendly materi-
als for transportation. To make a
valuable contribution to reducing
waste and conserving raw ma-
terials, dispose of the packaging
material at appropriate collection
points only.
Disposal of used units
Production of the units is subject
to constant quality control. The
materials processed are exclusively
of high quality and most of them
can be recycled. You can contrib-
ute to protecting the environment
by ensuring that your used unit is
disposed of in an environmentally
friendly manner in line with appli-
cable regional regulations, e.g. by
authorised disposal and recycling
companies or at designated collec-
tion points.
Guarantee
It is a prerequisite for any claims
under guarantee that the order-
ing party or its end customer
completely fills in the “Guarantee
Certificate” enclosed with the unit
promptly after sale and installation
and returns it to REMKO GmbH &
Co. KG.
The terms of the guarantee are set
out in the “General terms and con-
ditions of business and delivery”. In
addition, any supplementary agree-
ments can only be made between
the contractual parties. As a conse-
quence of this, you should contact
your direct contractual party in the
first instance.
Environmental
protection
and recycling
REMKO RKS
4

Refrigerating circuit RKS…H diagram
The units are supplied in robust
transport packaging. ImmediatelyImmediatelyImmediately
after delivery, check the units care-
fully, note any damage or missing
parts on the delivery note and no-
tify the carrier and your contractual
partner.
No liability will be accepted for
claims submitted later.
In cooling mode, the outdoor unit
of the split design combined room
environment system is used to dis-
charge the heat removed from the
room to be cooled by the indoor
unit into the open air.
On cooling and heating units, the
heat absorbed by the outdoor unit
can be discharged by the indoor
unit in the room to be heated in
heating mode. The unit can beThe unit can beThe unit can be
installed outdoors or, if certain
requirements are met, indoors.
The outdoor unit is made up of
a refrigeration circuit with com-
pressor, a blade condenser, a
condenser fan, a reversing valve
and a regulating element. TheTheThe
outdoor unit can be combined
with REMKO indoor units with a
corresponding refrigerating capac-
ity (see “Combinations” table).
The outdoor unit is actuated by
the controller for the indoor unit.
Winter controllers, base brackets,
wall brackets and refrigerant pipes
are available as accessories.
Unit description
Transport and
packaging
Combinations
Cooling and heating
RKS 435 H RKS 448 H
RXW 350 •
RXW 480 •
RXD 350 •
RXD 480 •
The indoor and outdoor units are connected by refrigerant pipes.
Outdoor unit
System setup
Indoors
Outdoors
Blocking valve
Condenser fan
M
M
Condenser fan
Reversing valve
Condenser Filter dryer Regulating element
Capillary pipe
Connecting
valve
Injection pipe
Connecting
valve
Suction pipe
Compressor
Injection pipe
Suction pipe
Condensation pipe
Indoor unit
Condensation pipe
5

Operation
The outdoor unit is operated by
the controller for the connected
indoor unit.
For this reason, the instructions
in the “Operation” section of the
indoor unit manual must be fol-
lowed.
Short-term shutdown
1. Shut down the system using
the remote control.
2. Disconnect the power supply to
the unit.
3. Inspect the unit for visible dam-
age and clean it as described in
the “Care and maintenance”
section.
4. If possible, cover the unit
with a plastic sheet to protect
it against the effects of the
weather.
Permanent shutdown
The units and components must
be disposed of in line with appli-
cable regional regulations, e.g. by
authorised disposal and recycling
companies or at designated collec-
tion points.
REMKO GmbH & Co. KG or your
contractual partner will be able to
provide you with the name of an
appropriate specialist company in
your area.
Shutting down
Regular care and compliance with
certain basic requirements ensure
fault-free operation of the unit and
long service life.
Care and maintenance
The power supply must be
disconnected and secured
against reconnection before
carrying out any work on the
equipment.
CAUTION
Care
 Keep the unit free of soiling,
fouling and other deposits.
 Clean the units with a moist
cloth.
Do not use a water jet.
 Do not use any cleaners that
are sharp, abrasive or contain
solvents.
 Only use appropriate clean-
ing agents, even for extremely
severe soiling.
 If necessary, check the level of
soiling of the exchanger fins.
 Cover the unit with a plastic
sheet to prevent dirt from get-
ting into the unit.
Maintenance
 We recommend that you ar-
range a maintenance contract
with annual maintenance inter-
vals with an appropriate special-
ist firm.
This will ensure reliable opera-
tion of the system at all times!
Type of work
Checks / maintenance / inspection
Initial operation Monthly Half yearly Yearly
General •
Checking voltage and current • •
Checking compressor function • •
Checking fan function • •
Fin exchanger soiling • •
Checking refrigerant level • •
Checking condensation drain • •
Checking insulation • •
This will ensure reliable
operation of the system at
all times!
HINT
REMKO RKS
6

Fault Possible cause Check Remedy
The unit is not running
or shuts itself down.
Power failure. Is all electrical equipment
working?
Check voltage and
wait for unit to restart.
Mains fuse defective.
Master switch off.
Are all lighting current circuits
functioning?
Replace mains fuse.
Turn on master switch.
Mains feed damaged. Is all electrical equipment
working?
Repair by
specialist company.
Waiting time after starting up
too short.
Did the unit restart after
approx. 5 minutes? Schedule longer waiting time.
Operation above or below
specified temperature range.
Are the fans on the
unit still working?
Observe temperature
range.
Intermittent over
or undervoltage.
Checking by a
specialist company.
Shut down and restart the
system.
Disconnecting contact on exter-
nal condensation pump open.
Is the external condensation
pump for the indoor unit indica-
ting a fault?
Clean the condensation pump
drain.
Have the pump replaced.
The unit is operating
with reduced or no
refrigerating capacity.
Air inlet and/or outlet
opening blocked by
foreign objects.
Foreign objects around air inlet
and outlet?
Clean blades.
Reduce air resistance.
Heating or wind load
increased.
Has there been a change to
the construction or application?
Take appropriate measures
to stop the heating and wind
loads.
No heat discharge possible. Is the fan on the outdoor unit
working?
Check fan / winter
controller.
Leak in refrigeration circuit. Is significant frost formation vi-
sible on the large blocking valve?
Repair by
specialist company.
The unit has been manufactured using state of the art production methods and its function has been tested
several times. However, if any malfunctions should occur, check the unit using the list below. In systems withHowever, if any malfunctions should occur, check the unit using the list below. In systems withHowever, if any malfunctions should occur, check the unit using the list below. In systems withIn systems withIn systems with
indoor and outdoor units, you should refer to the “Troubleshooting” and customer service sections in both op-
erating manuals. If all the function checks have been performed and the unit is still not working properly, notifyIf all the function checks have been performed and the unit is still not working properly, notifyIf all the function checks have been performed and the unit is still not working properly, notify
your local specialist dealer.
Troubleshooting and customer service
Functional fault
7

Assembly instructions for specialist personnel
Important information before
installation
 For installation of the entire
system, the instructions in the
operating manuals for the in-
door and outdoor units must be
followed.
 Bring the unit as close as pos-
sible to its installation location
in its original packaging. This
prevents any transport damage.
 Check that the content of the
packaging is complete and
inspect the unit for visible trans-
port damage.
Report any defects immediately
to your contractual partner and
the carrier.
 Lift the unit at the corners and
not at the refrigerant or con-
densation connections.
 The refrigerant pipes (injec-
tion and suction pipe), valves
and the connections must be
insulated to seal them against
vapour diffusion. If necessary,
the condensation pipe should
also be insulated.
 Choose an installation location
that ensures a free air inlet and
outlet. (See “Minimum clear-
ances” section.)
 Do not install the unit in the im-
mediate vicinity of equipment
that radiates a large amount of
heat.
Installation close to heat radia-
tion reduces the performance of
the unit.
 Do not open the blocking
valves for the refrigerant pipes
until the entire installation proc-
ess is complete.
 Seal open refrigerant pipes
against the ingress of moisture
using appropriate caps or ad-
hesive tapes and never kink or
crimp the refrigerant pipes.
 Avoid unnecessary bends. This
minimises the pressure loss
in the refrigerant pipes and
ensures a free return flow of
compressor oil.
 In particular, you should take
precautions to ensure the oil
return if the outdoor unit is po-
sitioned above the indoor unit.
(See “Oil return measures”
section.)
 If the basic length of the refrig-
erant pipe exceeds 5 metres,
refrigerant should be added.
For the quantity of additional
refrigerant, refer to the “Add-
ing refrigerant” section.
 Use exclusively the refriger-
ant pipe screw caps supplied
and do not remove them until
shortly before connection to the
refrigerant pipes.
 Set up all electrical connections
in line with the applicable DIN
and VDE regulations.
 Always secure electrical lines
properly in the electrical termi-
nals.
Otherwise, fire could be
caused.
Wall feed throughs
 A wall feed through of at least
70 mm in diameter and with
a 10 mm gradient from inside
to outside must be created for
each indoor unit.
 We recommend that the hole is
padded out inside or lined, e.g.
with a PVC tube, to prevent
damage to the pipes.
 When installation is complete,
the wall feed through must be
sealed with an appropriate seal-
ing compound.
Do not use materials containing
cement or lime.
Installation materials
The outdoor unit is either secured
to the wall using 4 screws and a
wall bracket or attached to the
floor using a base bracket.
Pipes in wall lead through
Control line
Condensation pipe
Injection pipe
Suction pipe
PVC pipe
REMKO RKS
8

Choosing the installation
location
The outdoor unit is designed for
horizontal upright installation
outdoors.
The installation location for the
unit must be horizontal, flat and
stable. The unit must also be se-
cured against tipping.
The outdoor unit can be set up
either outside or inside a building.
For outdoor installation, follow
the instructions below to protect
the unit against the effects of the
weather.
Rain
For floor or roof installation, the
unit must be installed with at least
10 cm of ground clearance.
On cooling and heating units,
raised installation increases the
heating capacity produced.
A base bracket is available as an
accessory.
Sun
The fin exchanger (condenser) for
the outdoor unit is a component
that emits heat.
Sunlight increases the temperature
of the fins and thus reduces the
heat discharged by the fin ex-
changer.
Where possible, the outdoor unit
should be installed on the North-
ern side of the relevant building.
Shading should be set up if re-
quired. This can take the form of a
small roof.
However, the measures taken may
not affect the emerging flow of
hot air.
Wind
If the unit is to be installed in
windy locations, it must be en-
sured that the emerging flow
of hot air is carried away in the
prevailing wind direction. If this is
not possible, the customer should
provide wind protection. Make
sure that the wind protection does
not block the air supply to the unit.
Installation inside buildings
 Ensure adequate heat dissipation if the outdoor unit is to be installed
in a cellar, loft, adjoining room or corridor.
 Install an additional fan, which should have the same volumetric air
flow as the outdoor unit to be installed in the room and be capable of
compensating for any additional pressure losses caused by air ducts.
Snow
In regions with heavy snowfall,
you should install the unit on the
wall.
It should be installed at least 20 cm20 cm20 cm
above the highest expected snow
level to prevent snow from pen-
etrating into the outdoor unit.
A wall bracket is available as an
accessory.
Minimum clearance to snow
Installation inside buildings
Wind 20 cm
Hot air Cold fresh
air
Light well
Outdoor unit
Hot air
Light well
Additional
fan
Snow
Wind protection
9

 Ensure a continuous, unim-
peded air supply from outside,
if possible through opposite air
openings of sufficient size.
 Comply with any static and
other structural regulations
and conditions for the building
and provide sound insulation if
necessary.
Minimum clearances
The diagram below specifies the
minimum clearances for fault-free
operation of the units.
These protection zones allow
unimpeded air inlet and outlet,
ensure sufficient space for mainte-
nance and repairs and protect the
unit against damage.
RKS 435H RKS 448H
A 100 mm
B 700 mm
C 400 mm
D 100 mm
E 200 mm
Oil return measures
If the outdoor unit is positioned at
a higher level than the indoor unit,
appropriate oil return measures
must be put in place. This normallyThis normallyThis normally
involves creating an oil lifting bend
for each 2.5 metre rise.
Oil return measures
Installation
The instructions below describe
the installation of the refrigerat-
ing circuit and of the indoor and
outdoor units.
1. For the required pipe cross-sec-For the required pipe cross-sec-
tions, refer to the “Technical
data” table for the outdoor
unit.
2. Install the indoor unit and con-Install the indoor unit and con-
nect the refrigerant pipe as de-
scribed in the operating manual
for the indoor unit.
3. During installation, observe theDuring installation, observe the
bending radii of the refrigerant
pipes and never bend a section
of the pipe twice.
This can result in brittleness and
a risk of cracking.
4. Lay the refrigerant pipes fromLay the refrigerant pipes from
the indoor unit to the out-
door unit. Ensure that they areEnsure that they areEnsure that they are
adequately secured and make
suitable provision for oil return!
5. Install the outdoor unit withInstall the outdoor unit with
wall or base bracket on sections
of a building that are statically
approved for this purpose.
Follow the installation instruc-
tions for the brackets.
6. Ensure that no structure-borneEnsure that no structure-borne
noise is transmitted to sections
of the building. Transmission of
structure-borne noise is reduced
by vibration absorbers!
7. Remove the factory-fittedRemove the factory-fitted
protective caps and the screw
caps on the blocking valve con-
nections and use them in the
subsequent installation.
8. Make sure that the screw capMake sure that the screw cap
is fitted onto the pipe before
bordering the refrigerant pipes.
9. Process the laid refrigerantProcess the laid refrigerant
pipes (Figure 1+2).
Installation may only be per-
formed by authorised special-
ist personnel.
NOTE
Minimum clearances
Air inlet E
C
B
A
D
Air
outlet
Outdoor unit
Oil lifting bend
in suction pipe to
outdoor unit,
1x per 2.5 metre
rise
Radius:
50 mm
max. 8/10 m
Outdoor unit
Refrigerant pipe
Deburrer
1 Deburring the refrigerant pipe
Bordering tool
2 Bordering the refrigerant pipe
REMKO RKS
10

10. Check that the border has the
correct shape (Figure 3).
11. First connect the refrigerant
pipes to the blocking valves by
hand to ensure a correct fit.
12. Then permanently secure the
screw attachments using 2
spanners of appropriate size.
While tightening, always hold
with a spanner (Figure 4).
13. Fit the two installed refrigerant
pipes, including the connectors,
with appropriate heat insula-
tion.
14. Only use insulation hoses that
are suitable for use and suf-
ficiently resistant to diffusion in
the relevant temperature range.
Additional installation in-
structions
 When the outdoor unit is used
in combination with certain in-
door units, the refrigerant pipes
may need to be connected in
a different way. If so, fit theIf so, fit theIf so, fit the
reducing or expanding screw
attachments supplied to the
indoor unit.
 If the basic length of the con-
nection line is greater than 5m,
refrigerant must be added to
the system during initial opera-
tion.
See “Adding refrigerant” sec-
tion
Leak test
Once all connections have been
made, the manometer station is
attached to the corresponding
Schrader valve connections, if fit-
ted:
red = small valve= small valve= small valve
= injection pressure= injection pressure
blue = large valve= large valve= large valve
= suction pressure= suction pressure
After connection, the leak test is
performed with dry nitrogen.
The leak test involves spraying
the connections fitted with leak
detection spray. If bubbles can beIf bubbles can beIf bubbles can be
seen, the connection is not fitted
correctly.
In this case, tighten the screw at-
tachment or create a new border.
After a successful leak test, the
excess pressure is removed from
the refrigerant pipes and a vacuum
pump with an absolute final partial
pressure of at least 0.01 mbar is
started up to create a vacuum in
the pipes. This also removes anyThis also removes anyThis also removes any
residual moisture from the pipes.
A vacuum of at least
0.05 mbar abs. must be
created!
CAUTION�CAUTION�
The time taken to create the
vacuum depends on the pipe
volume in the indoor unit and the
length of the refrigerant pipes, but
the process definitely takes at least
60 minutes.
Once foreign gases and moisture
have been completely removed
from the system, the valves on the
manometer station are closed and
the valves on the outdoor unit are
opened as described in the “Initial
operation” section.
Only tools that are approved
for use on refrigeration equip-
ment may be used.
Pipe cutters, deburrers and
bordering tools.
NOTE
3 Correct border shape
Tightening with 1st spanner
Holding with
2nd spanner
4 Tightening screw attachments
Tightening
torque:
14“
12-16 Nm
38“
28-32 Nm
12“
40-44 Nm
58“
64-68 Nm
11

Condensation connection
Because the temperature on the
register is below the dew point,
condensation is formed during
heating.
The lower housing cover on the
outdoor unit takes the form of a
collector. The condensation con-The condensation con-The condensation con-
nection supplied is to be fitted
here.
 The on-site condensation pipe
must be laid with a gradient of
at least 2%.
If necessary, fit insulation that is
resistant to vapour diffusion.
 When operating the unit at an
external temperature of less
than 0°C, the condensation
pipe must be laid with frost
protection. The customer mustThe customer mustThe customer must
keep the lower housing cover
free of frost to guarantee con-
stant drainage of the condensa-
tion. If necessary, auxiliary pipe
heating should be fitted.
 After laying the pipes, free
drainage of the condensation
must be tested and permanent
impermeability ensured.
Electrical connection
The connections on the outdoor
unit are located inside the unit
above the connecting valves.
The conductor cross-section of
the power supply depends on the
structural conditions and the con-
nected load of the unit.
Connecting the outdoor unit
Before starting the connection,
observe the following instructions:
Connecting the RXW 350
wall unit
A power supply to the indoor unit
and a 5-wire control line from the
outdoor unit to the indoor unit
must be installed.
Connecting the RXW 480
wall unit
A power supply to the indoor unit
and a 6-wire control line from the
outdoor unit to the indoor unit
must be installed.
 The power supply comes from
the connecting terminals on the
RXW indoor unit.
We recommend using a master
switch and a repair switch.
 If the lines are installed in areas
with strong magnetic fields, the
control lines should be shielded.
 The outdoor unit is actuated
by the connecting line from the
indoor unit.
 The system is fused as set out
in the technical data.
Connecting the RXD
ceiling cassette
A power supply to the outdoor
unit and a 6-wire control line from
the outdoor unit to the indoor unit
must be installed.
 The customer must install the
connecting box close to the
outdoor unit.
We recommend using a master
switch and a repair switch.
If the lines are installed in areas
with strong magnetic fields, the
control lines should be shielded.
 The power supply to the indoor
unit comes from the connecting
line from the outdoor unit.
 The system is fused as set out in
the technical data.
The procedure for connecting the
line is as follows:
1. Remove the unit cover.Remove the unit cover.
2. Remove the side panels on theRemove the side panels on the
connection.
3. Select the cross-section of theSelect the cross-section of the
connecting line based on the
specifications.
4. Run the two lines through theRun the two lines through the
edge protection rings on the
fixed connecting plate.
5. Connect the lines as shown inConnect the lines as shown in
the connection diagram.
6. Secure the line in the strainSecure the line in the strain
relief and re-assemble the unit.
REMKO RKS
12

R(M,V) S(X)
3
2
N(1)
C(U)
M1
M2
BL
BL
BN
BN
YE
YE
YE
RD
RD
RD
BK
N
BL
Electrical connection diagram
With this unit combination, a
compressor contact is fitted in
the factory.
RKS 435H combined with RXW 350
Electrical circuit diagram
RXW 350 connection
Outdoor unit Indoor unit Mains feed line
Compressor actuation
Neutral
conductor
External
conductor
Protective
conductor
Fan actuation
Reversing valve actuation
Red Red
Yellow Yellow
230 V~,
50 Hz,
L1 / N / PE
RXW 480 connection
Outdoor unit Indoor unit Mains feed line
Compressor actuation
Neutral
conductor
External
conductor
Protective
conductor
Fan actuation
Reversing valve actuation
Red Red
Yellow Yellow
230 V~,
50 Hz,
L1 / N / PE
RXW 350 / RXD 480 connection
Outdoor unit Indoor unit Mains feed line
Neutral conductor
External conductor
Protective conductor
Fan motor
Reversing valve
230 V~,
50 Hz,
L1 / N / PE
Compressor contact
Control conductor
Control conductor
Control conductor
Colour coding
WH = White
BL = Blue
BN = Brown
BK = Black
RD = Red
YE = Yellow
Compressor
Condenser
fan
Reversing valve
2
Fit the sensor of the indoor unit
into the casing of the outdoor unit
condenser bow!
13

R(M,V) S(X)
2
N(1)
C(U)
M1
M2
BL
BL
BN
BN
YE
YE
YE
RD
RD
RD
BK
N
BL
F
C
N
L
V
BL
BL
BK
R(M,V) S(X)
3
2
N(1)
C(U)
M1
2
1
R(M,V) S(X)
C(U)
M2
BL
BL
BL
BN
BN
BN
YE
YE
YE
RD
RD
RD
BK
RKS 435H combined with RXW 350,
RKS 448H combined with RXD 480
RKS 448H combined with RXD 480
Colour coding
WH = White
BL = Blue
BN = Brown
BK = Black
RD = Red
YE = Yellow
Colour coding
WH = White
BL = Blue
BN = Brown
BK = Black
RD = Red
YE = Yellow
Compressor
Condenser
fan
Reversing valve
Condenser
fan
Compressor
Reversing valve
REMKO RKS
14

After successfully completing the
leak test, the vacuum pump should
be connected to the valve connec-
tions on the outdoor unit through
the manometer station (see “Leak
test” section) and a vacuum
should be generated.
Before initial operation of the unit
and after any work on the refriger-
ating circuit, the following checks
must be performed and document-
ed in the installation log:
 Check all refrigerant pipes and
valves for leaks and for unin-
tentional swapping of suction
and injection pipes using leak
detection spray or soapy water
when unit is stopped.
 Check refrigerant pipes and
insulation for damage.
 Check electrical connection be-
tween indoor unit and outdoor
unit for correct polarity.
 Check all attachments, mount-
ings etc. for proper retention
and correct level.
RKS 435H RKS 448H
Basic pipe length Additional quantity
Up to 5 m inclusive -
5 m to max. 15 m 22 g/m
Adding refrigerant
The unit has a basic filling level of
refrigerant.
For basic refrigerant pipe lengths
of more than 5 m, additional re-
frigerant must be added, as speci-
fied in the table below:
Before initial operation
Make sure that the refrigerant
used is always added in liquid
form!
CAUTION
Initial operation
Initial operation must be carried
out in line with the initial opera-
tion certificate and documented
accordingly.
Once all components have been
connected and tested, the system
can be started up.
To ensure proper functioning,
a functional test should be per-
formed before handover to the
operator to identify any irregulari-
ties during operation of the unit.
This check depends on the indoor
unit installed.
The procedures are documented
in the operating manual for the
indoor unit to be operated.
Functional test and test run
Test the following points:
 Impermeability of refrigerant
pipes.
 Smooth running of compressor
and fan.
 Discharge of cold air from
indoor unit and heated air from
outdoor unit in cooling mode.
 Functional test on indoor unit
and all program sequences.
 Check surface temperature of
suction pipe and identify any
evaporator overheating. ToToTo
measure the temperature, hold
the thermometer on the suction
pipe and subtract the boiling
point temperature read from
the manometer from the meas-
ured temperature.
 Document the measured tem-
peratures in the initial operation
log.
15

Test run
1. Remove the covers from theRemove the covers from the
valves.
2. Start initial operation by brieflyStart initial operation by briefly
opening the blocking valves
on the outdoor unit until the
manometer indicates a pressure
of approx. 4 bar.
3. Check all connections for leaksCheck all connections for leaks
using leak detection spray or
appropriate equipment.
4. If you have identified any leaks,If you have identified any leaks,
open the blocking valves by
turning them as far as possible
anticlockwise using a hexagonal
wrench.
If leaks are identified, the
defective connection should be
replaced. It is then essential toIt is then essential toIt is then essential to
repeat vacuum generation and
drying.
5. Turn on the on-site masterTurn on the on-site master
switch or fuse.
6. Set the target temperature onSet the target temperature on
the indoor unit to a lower tem-
perature than the current room
temperature using the remote
control.
7. Switch the indoor unit to cool-Switch the indoor unit to cool-
ing mode.
9. Check the control of the indoorCheck the control of the indoor
unit using the functions de-
scribed in the operating manu-
al:
timer, temperature settings and
all mode settings.
10. Measure overheating, the
external, internal, outlet and
evaporation temperatures and
enter the measured data in the
initial operation log.
11. Remove the manometer and
re-attach all parts previously
removed.
Make sure that the seals are
fitted in the covers.
Final measures
 Re-fit all parts removed.
 Instruct the operator in how to
use the system.
8. During the test run, check theDuring the test run, check the
function and correct setting
of all regulating, control and
safety devices.
Dimensions and design subject to modifications in the course of technical development.
Unit dimensions
Because of the start-delay, the
compressor starts running a
few minutes later.
NOTE
540120
850
285
540
RKS 435H / RKS 448H
All figures in mm
290
770
REMKO RKS
16

Technical data
17
REMKO RKS
Series RKS 435H RKS 448H
Functions Outdoor unit for cooling and heating
Rated refrigerating capacity 1)ing capacity 1) kW 3,49 4,78
Rated heating capacity 2) kW 3,78 5,17
Outdoor unit operating range - cooling °C +21 to +45 (with optional winter controller -10 to +45)
Outdoor unit operating range - heating °C -7 to +21
Refrigerant R 410A
Max. operating pressure, per refrigerating circuit kPa 3800 / 1200
Max. volumetric air flow m³/h 2000 2100
Max. noise level 3) dB(A) 49 51
Power supply V/Hz 230 / 1~/ 50
Degree of protection IP 24
Rated elec. power consumption – cooling 1) kW 1,07 1,48
Rated elec. current consumption – cooling 1) A4,91 6,91
Rated elec. power consumption – heating 2)ing 2) kW 1,09 1,51
Rated elec. current consumption – heating 2)heating 2) A4,99 7,01
Max. elec. starting current A 24 32
Basic refrigerant quantity kg 1,35 1,56
Additional refrigerant quantity > 5m g/m 22
Injection pipe refrigerant connection Inch (mm) 1/4 (6,35)
Suction pipe refrigerant connection Inch (mm) 1/2 (12,7)
Max. refrigerant pipe length m 15,0
Max. refrigerant pipe height m 8,0
Dimensions Height mm 540
Width 770
Depth 290
Weight kg 37,0 41,0
Serial number 657... 658...
IT no. 1619200 1619210
1) External temperature TK 35°C / FK 24°C, combined with RXW 350 / RXW 480
2) External temperature TK 7°C / FK 6°C, combined with RXW 350 / RXW 480
3) Clearance 1 m

Unit illustration
1
2
3
4
6
7
8 9
11
10
Dimensions and design subject to modifications in the course of technical development.
12
13
5
REMKO RKS
18

Spare parts list
For spare parts orders, always specify the IT no., the unit no. and the unit type (see rating plate)!
No. Designation RKS 435H RKS 448H
1 Front panel 1105811 1105811
2 Condenser fan blade 1105817 1105817
3 Condenser fan motor 1105816 1105826
4 Blade condenser 1105812 1105823
5 Cover plate 1105810 1105810
6 Side plate, right 1105815 1105815
7 Compressor, complete 1105813 1105824
8 Condenser, compressor 1105814 1105825
9 Condenser, condenser fan 1105820 1105827
10 Blocking valve, suction pipe 1105818 1105818
11 Blocking valve, injection pipe 1105819 1105819
12 Compressor contact - 1105828
13 Reversing valve 1105821 1105821
Spare parts not illustrated
Winter controller 1613162 1613162
19

Subject to technical modifications, no liability accepted for specifications in this document!
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problems.
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REMKO not only has an extensive do-
mestic and international sales network,
our sales staff are highly qualified
experts.
REMKO field staff are more than just
salesmen: They must be able to advice
our customers on air conditioning and
heating technology.
Customer service
Our units work accurately and reliably.
However, if a fault should ever occur,
you can count on REMKO customer serv-
ice. Our extensive network of experi-
enced dealers guarantees that you will
always receive quick and reliable service.
REMKO GmbH & Co. KG
Air Conditioning and Heating Technology
Im Seelenkamp 12 · D-32791 Lage
PO Box 1827· D-32777 LageD-32777 LageD-32777 Lage
Telephone [phone]+49 5232 606-0
Fax [phone]+49 5232 606-260
E-mail [email protected][email protected][email protected]
Internet www.remko.dewww.remko.dewww.remko.de