REMKO WLT
WLT 25, WLT 27, WLT 45, WLT 55, WLT 75, WLT 85
Chilled water wall units
Operation · Technology · Spare parts
Edition GB - W10
Contents
Safety notes
Environmental protection and recycling
Warranty
Transportation and packaging
System description
Unit description
Operation
Shut-down
Care and maintenance
Trouble-shooting and customer service
Installation instructions for qualified personnel
Installation
Condensate drainage connection
4
4
4
5
5
6
6-11
12
12-13
14-15
15-16
16-17
17
Electrical wiring
Electrical drawings
Leak testing
Before commissioning
Commissioning
Unit dimensions
Technical data
Exploded view
Spare parts list
Read these operating instructions carefully
before commissioning / or using the system.
18
18
19
19
19-20
20
21-22
23
23
Made by REMKO
These instructions are an integral part of the unit and must be
kept at all time near by or on the system.
This operating manual is a translation of the German original.
Subject to modifications; no liability accepted for errors or misprints!
3
REMKO WLT
Safety notes
Carefully read the operating instructions before commissioning the
system. It provides useful tips and
information as well as hazard
warnings to prevent injury or material damage .
Failure to follow the directions in
this manual can result in injury,
damage to the environment and
the system itself and will null in
void any claims for liability.
■
Keep this manual close to the
system.
■ The system or components
are not to be exposed to any
mechanical stresses, extreme
levels of humidity or extreme
sunlight.
■ The unit should be set up and
installed only by qualified personnel.
■ The installation, connection and
operation of the system and its
components must be carried out
in accordance with the operating instructions as stipulated in
this manual and comply with all
applicable local regulations.
■ Mobile systems must be set up
securely on suitable surfaces and
in an upright position. Stationary
systems must be permanently
installed for operation.
■ Modification of the system or
its components supplied by
REMKO is not permitted and
can cause malfunctions.
■ The system and components
may not be operated in areas
where there is an increased risk
of damage. Observe the minimum clearances.
■ The electrical supply should be
adapted to fulfil the requirements of the system.
4
■ The operational safety of system
and components is only assured
if they are fully assembled and
used as intended. Safety devices
may not be modified or disconnected.
■ Do not operate the system or
components with obvious defects or signs of damage.
■ All housing parts and openings
in the system, e.g. air inlets and
outlets, must be free of foreign
objects, fluids, or gases.
■ The system and components
must not be installed in hazardous areas or areas where the air
is contaminated with abrasive/
corrosive materials or dust.
■ Touching some parts of the sys-
tem can result in burns or other
injury. Wearing appropriate
protective clothing is necessary
to avoid risks.
■ Only authorised personnel and
personnel trained in the use of
the system and its components
are permitted access to and
allowed to operate the system
and its components.
■ Installation, repair and mainte-
nance work should only be carried out by authorised personnel. Inspection and cleaning can
be performed by the operator
providing the system is not under current/voltage.
■ To avoid any risks to persons,
appropriate precautions are to
be taken when installing, repairing, maintaining, cleaning or
working on the system.
■ The system or components
are not to be exposed to any
mechanical stresses, extreme
levels of humidity or direct
sunlight.
Environmental
protection
and recycling
Disposal of packaging
All products are packed for transport in environmentally friendly
materials. Make a valuable contribution to reducing waste and
preserving raw materials. Only
dispose of packaging at approved
collection points.
Disposal of equipment
and components
Only recyclable materials are used
in the manufacture of the system
and components.
Help protect the environment by
ensuring that the system or components (for example batteries) are
not disposed in household waste,
but only in accordance with local
regulations and in an environmentally safe manner, e.g. using certified firms and recycling specialists
or at collection points.
Warranty
It is important for any warranty
claims is that the customer or
his accepting representative fully
complete the warranty registration card and commissioning report
which is included with the system
at the time when it is purchased
and commissioned and that these
documents are returned to REMKO
GmbH & Co. KG. The warranty
conditions are detailed in the "General terms and conditions". Only
the parties to a contract can negotiate any special agreements beyond
these conditions. In this case, contact the contractual partner.
Transportation and
packaging
The system is shipped in sturdy
transport packaging. Immediately
check the system on delivery and
make note of any damage or missing parts on the delivery note and
inform the forwarding agent and
your contractual partner.
System configuration
System configuration
Indoor area 1 Indoor area 2 Indoor area 3
Warranty claims at a later date will
not be accepted.
System description
The unit is designed for a
2-conductor system. The system
has 2 medium pipes (conductors:
supply and return flow) for cooling
using a cold medium or heating
using a warm medium.
In cooling mode the combined
cooling register / heating register
in the indoor unit extracts the heat
from the room air by absorbing
it into the operating medium.
A circulation pump transports
the heated medium to a chiller
which extracts the heat from
the medium in an evaporator and
then passes it on to the outside air
via a cooling cycle in a condenser.
The cooled operating medium is
then fed in once again to the unit
medium circuit.
With 2-pipe systems, which
are used for cooling or heating,
the heating capacity can be
provided through a chiller with
heat pump function or through
a boiler and fed into the circuit.
In heating operation the indoor
unit can deliver the heat from
the operating medium
to the room air.
Chilled water
user
Condensate drain Condensate drain Condensate drain
Condensate
collecting
drain
Infrared remote control
Outdoor area
Chilled water system
Condensate line (only
units with HP-function)
Cabled remote control
Chilled water
user
Infrared remote control
Medium inlet
Intended use
Depending on the model and
the equipment, the units are only
intended to be used as a fan coil
in a 2-pipe-system to cool or heat
up rooms by the medium water
or a water-glycol mixture within a
closed cycle.
Any other use or use in a way that
dose not conform with the definition above is considered an incor-
The manufacturer/supplier assumes no liability for damages arising from the incorrect use of the
system or any part of it. The user
dose so at their own risk. Using the
system correctly means working
in accordance with the operating
manual, installation instructions
and complying with the maintenance requirements.
rect use.
Chilled water
user
Medium outlet
5
REMKO WLT
Unit description
In cooling mode the unit (chilled
water user) extracts the heat from
the interior room by the finned
heat exchanger and transform it to
the cold operating medium water,
or a mixture of water and glycol,
within a closed medium cycle.
As a result of the heat exchange
the medium heats up and the
emergent air cools the room down.
In heating mode a warm operating
medium is able to warm up the
room. The medium cools down as
a result of the heat exchange.
A 3-way-valve, which routes
the operating medium through
the register (energy is given up)
or past the resister (energy is
not given up), is used to control
the cooling or heating capacity.
The unit is designed to be
mounted high up on indoor
walls. It is operated by an infrared
remote control.
The unit consists of a finned
heat exchenger, circulation fan,
controller and condensate pan.
Cabled remote controls and
condensate pumps are available as
accessories.
Medium cycle schematic
Operation
The unit is easily operated using
the standard infrared remote
control. The unit beeps to
acknowledge the correct
transmission of data. If it is not
possible to program the indoor unit
with the remote control, then it can
also be manually operated.
Manual operation
The unit can also be started
manually. After the air inlet screen
has been opened, the inner
recessed key can be pressed and
automatic mode can be activated.
Press a key on the infrared remote
control to interrupt the manual
operation.
Display
The lit display LEDs indicate the
mode set.
Operation LED
Red Electrical
power available
Operating mode LED
Red Heating mode
Green Cooling mode
Red/yellow
Heating
Red/green
Cooling
Automatic mode
Automatic mode
Receiver
Infrared receiver
Operation LED
Operating mode LED
CAUTION
If the LEDs flash then there is
an indoor unit alarm present
(see chapter Troubleshooting
and customer service).
Infrared remote control
The infrared remote control
sends the programmed settings
a distance of up to 6 m to the
receiver of the unit (fig. 1, page 7).
Data will only be received correctly
if the remote control is pointed
at the receiver and no objects are
obstructing the transmission path.
First insert the supplied batteries (2
each, type AAA) into the remote
control. To do so, pull off the flap
of the battery compartment and
insert the batteries correctly by
polarization (see marks).
Fan
heat exchanger
6
3-way-valve
Medium outlet connection
Medium inlet connection
NOTE
Immediately replace flat
batteries with a new set,
otherwise there is a risk of
leakage. It is recommended
that the batteries are removed
if the equipment is shut down
for longer periods.
1 Max. distance 6 m
max. 6 m
Keys on the remote control
TIP
Help save on energy consumption in stand-by mode! If the
device, system or component
is not in use, we recommend
disconnecting the power supply. Components with a safety
function is excluded from our
recommendation!
Keys on the remote control
"ON / OFF" key
Actuate the key to switch
the unit on.
The POWER indicator
for the unit illuminates
"FAN" key
(Fan speed)
Set the desired fan speed with
the help of this key.
The following 4 speeds are
available:
HIGH, MED, LOW, AUTO
(automatic speed).
"TM" key p and "TM q" key
(timer operation)
You can program the switching
on and off within the next 18
hours with the timer function.
"SLEEP" key
(night temperature increase)
If the sleep function is activated
then the set room temperature
is increased by 1 °C. Renewed
actuation of the SLEEP key
resets the function.
"MODE" key
(Modes 1 to 5 )
The room air conditioner
provides 5 modes:
1. AUTO mode:
This mode maintains the
temperature at the preset value.
The mode LED changes colour
periodically between yellow to
green for a request for cooling,
or from yellow to red for a
request for heating.
It is essential that the necessary
carrier medium can flow quickly
through the pipe network. If
the unit is in AUTO mode and
the medium is only available
after a delay then this will result
in a fault shut-down.
The system will not switch back
on again automatically.
2. FAN mode:
Air circulation without cooling
or heating mode can be
implemented in this mode.
3. COOL mode:
In this mode, the warm air
in the room is cooled down
to the preset temperature.
The mode LED for the cooling
mode starts to illuminate green.
4. DRY mode:
In this mode, the room is
mainly dehumidified, the set
temperature is maintained.
5. HEAT mode:
In this mode, the unit heats
the colder air in the room to
the preset temperature.
The mode LED for the heating
mode starts to illuminate red.
Only with cooling / heating
systems with warm operating
medium (water).
"TMP" pkey and "TMP" qkey
The desired temperature can
be adjusted in 1 °C steps within
a range from 16 °C to 30 °C
with the temperature key.
"CANCEL" key
The timer operation can be
stopped with the Cancel key.
"SWING" key
The oscillating fins improve
the air distribution in the room
when switched on.
7
REMKO WLT
Key functions
MODE key
AUTO mode
MODE
Use the "MODE" key to select between the individual operating modes.
A total of 5 modes are available:
1. AUTO Automatic mode, automatic selection of cooling
or heating mode
2. FAN Circulation mode, no cooling or heating capacity
3. COOL Cooling mode, mainly used in summer
4. DRY Dehumidification mode, summer or winter mode
5. HEAT Heating mode, mainly used in winter
MODEMODEMODEMODE
To enter the automatic mode, actuate the "MODE" key once or several
times until the AUTO indication is shown in the display.
In this mode, the controller automatically selects COOL or HEAT mode
depending on the temperature. The temperature is then maintained at
the set value.
It is also advisable to set the FAN setting to FAN AUTO.
FAN mode
COOL mode
MODE
Set temperature is
below the room temperature
Set temperature is
above the room temperature
FAN
qTMP
or
pTMP
COOLING
or
HEATING
To enter the circulation mode, actuate the "MODE" key once or several
times until the FAN indication is shown in the display. In this mode,
the unit is used as an air circulation unit. The room is neither heated nor
cooled.
MODE
FAN
CIRCULATION MODE
Use the "COOL" mode if you wish to cool the room down to the desired
temperature.
Reduce the temperature in 1 °C steps by actuating the "qTMP" key.
After the beep the COMP display starts to flash for approx. 3 minutes.
This waiting time is required to allow the valve assembly to open
completely. If the indicator is shown constantly then the air conditioning
unit has started its work. If the temperature falls to approx. 2 °C below
the set room temperature, the controller will switch off cooling mode.
MODE
8
qTMP
or
pTMP
COOLING MODE
DRY mode
The heat exchanger cools the air below its dew-point due to the low inlet
temperature - this results in the airborne humidity being condensed out.
The "DRY" mode thus dehumidifies the room. After pressing the "DRY"
key the desired temperature and fin position can be selected. The fan is
switched off at certain intervals to lower the fin temperature.
HEAT mode
ON / OFF key
MODE
qTMP
or
pTMP
DEHUMIDIFICATION
MODE
In the "HEAT" mode you can heat the room (only with cooling / heating
systems with warm operating medium). Actuate the "HEAT" key. Note
that the desired temperature must be higher than the room temperature!
If the set temperature is exceeded by 1 °C, then the controller turns the
heater function off. The COMP. indicator goes out. If the room temperature
drops below the set temperature then the heating function switches back
on again after 3 min. waiting time (COMP indicator flashes).
MODE
qTMP
or
pTMP
HEATING MODE
Activate and deactivate your air conditioning unit with the "ON/OFF"
key. The programmed settings and adjustment values from before
the unit was turned off will appear on the display.
FAN key
ON / OFF
ON / OFF
After actuating the "FAN" key, "AUTO" can be seen in the fan speed
display. Each further actuation of the key results in a reduction in speed.
FAN
FAN
FAN
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REMKO WLT
SWING key
SLEEP key
The "SWING" key enables the swinging or locking of the oscillating
fins. This improves the distribution of the cooled air inside the room
when switched on ( ). The unit enables an automatic vertical air
distribution and, in addition, horizontal air distribution through manual
setting of the vertical fins.
SWING SWING SWING SWING
SWING
The room temperature is increased by 1 °C one hour after the start
of this function by actuating the "SLEEP" key. To cancel this function
the "SLEEP" key must be pressed anew. The ( ) symbol disappears
and the normal display appears.
SLEEP
SLEEP
°C - °F conversion
CANCEL key
AUTO
The setting of the unit allows the display to show both °C and °F.
The standard setting is programmed as °C at the factory.
°C
Short-term
qTMP
and
pTMP
°F
Short-term
qTMP
and
pTMP
The programmed switch-on or switch-off time can be reset by actuating
the "CANCEL" key.
AUTO
CANCEL
AUTO
10
TIMER KEY
Switch-on delay
The "Timer" keys are used for programming a switch-on or switch-off
delay. If the air conditioning unit should be switched on with a time
delay then press one of the keys whilst the remote control is switched
off. If the air conditioning unit should be switched off with a time delay
then press one of the keys whilst the remote control is switched on.
With both operational conditions a time period appears in the lower
display. The desired time period can be reduced in one hour steps
with the "q TM" key or increased with the "TM p" key. The mode,
the desired temperature and the fan speed from the last setting are
adopted with the programming of the switch-on time delay.
Switch-off delay
Manual air distribution
AUTO
The time span is reduced from this point in time. Once the time
has elapsed the unit switches on or off automatically.
The timer can be cancelled with the "CANCEL" key, through pressing
the "ON/OFF" key twice or by resetting the remaining time to "0".
Switch-on delay
Switch-off delay
AUTO
qTM
or
pTM
qTM
or
pTM
pTM
pTM
pTM
.........
pTM
.........
pTM
pTM
AUTO
There are individually adjustable fins for adjusting the horizontal air distribution on the air outlet side.
Manual air distribution
CAUTION
Moving interior parts such as
the fan may to cause injury
during operation!
Only make adjustments after
Shift lever left
Shift lever right
swing operation has been
turned off.
11
REMKO WLT
Shutdown
Temporary shutdown
1. Let the unit run for 2 to 3
hours in circulation mode, or
in cooling mode at maximum
temperature, to extract any
residual humidity from the unit.
2. Shut down the system using
the remote control.
3. Switch off the electrical power
supply to the unit.
4. Check the unit for visible
signs of damage and clean as
described in the chapter "Care
and maintenance"
Permanent shutdown
Ensure that units and components
are disposed of in accordance with
local regulations, e.g. through
authorised disposal and recycling
specialists or at collection points.
REMKO GmbH & Co. KG or your
contractual partner will be pleased
to provide a list of certified firms
in your area.
Care and maintenance
Regular care and maintenance
ensure the trouble-free operation
and long service life of the unit.
CAUTION
Prior to performing any work,
ensure that the unit is isolated
from the electrical power
supply and secured to prevent
accidental switch-on!
Care
■
Ensure the unit is protected
against dirt, mould and other
deposits.
■
Clean the unit using a damp
cloth. Do not use any caustic,
abrasive or solvent-based
cleaning products. Do not use
a jet of water.
■
Clean the fins on the unit prior
to long shutdown periods.
Maintenance
■
It is recommended that you
take out a maintenance
contract with an annual service
from an appropriate specialist
firm.
TIP
A maintenance contract will
guarantee that your system
always operates reliably!
12
Type of task
Checking / Servicing / Inspection
General
Medium cycle bleeding
Check medium filling
Contamination of fin heat exchenger
Filter contamination
Check voltage and current
Check function of fan
Check condensate drainage
Check insulation
Commissioning
Monthly
Half-yearly
•
• •
• •
• •
• •
• •
• •
• •
• •
Yearly
Cleaning the housing
1. Disconnect the power supply
to the unit.
2. Open and fold the intake grill
on the front side upwards.
3. Clean the grill and housing
using a soft, damp cloth.
4. Switch the power supply back on.
Air filter for indoor unit
Clean the air filter at intervals
of no more than 2 weeks. Reduce
this interval if the air is especially
dirty.
Cleaning the filter
1. Disconnect the power supply
to the unit.
4. Clean the filter using a normal
vacuum cleaner (Fig. 3).
Turn the dirty side until it faces
up.
5. Dirt can also be removed
by carefully cleaning with
lukewarm water and mild
cleaning agents.
Turn the dirty side downwards
for this (Fig. 4).
6. If water is used, let the filter
dry out properly in air before
replacing it in the unit.
7. Carefully insert the filter.
Ensure that it locates correctly.
8. Close the front side as described
above in reverse order.
9. Switch the power supply back on.
10. Switch the unit on again.
Cleaning of condensate pump
(accessory)
An optional integrated or separate
condensate pump may be in
the indoor unit, which pumps out
any accumulated condensate into
higher positioned drains.
Observe the care and maintenance
guidelines in the separate
operating manual.
2. Open the front side of the unit
by folding the guard upwards
and allowing it to engage.
3. Lift the filter up slightly and pull
it out from underneath.(Fig. 2).
2 Fold the guard upwards 3 Cleaning using a vacuum cleaner 4
Cleaning with lukewarm water
13
REMKO WLT
Troubleshooting and customer service
The unit and components are manufactured using state-of-the-art production methods and tested several times
to verify their correct function. However, if malfunctions should occur, please check the functions as detailed
in the list below. With systems for cooling or heating with indoor units, chillers or heating systems the chapter
"Troubleshooting and customer service" in all operating manuals must also be observed. Please inform your
dealer if the unit is still not working correctly after all function checks have been performed!
Malfunctions
Alarm Possible cause Checks Remedial measures
The unit does
not start or switches
itself off.
The unit does not respond to
the remote control.
The unit is running but
only provides reduced
or no cooling or heating.
Condensate discharge on unit.
Power failure, low voltage, main
fuse defective / main switch
turned off.
Power supply damaged. Does all other electrical equipment
Waiting time after turn on too
short.
Operating temperature fallen
below / exceeded.
Power surge due to thunderstorm. Have there been lightning strikes
External condensate pump alarm. Did the pump shut down due to
Transmission distance too large /
receiving problem.
Remote control is defective. Is the unit running in manual
Receiver and transmitter are
exposed to too much sun
exposure.
Electromagnetic fields disrupt the
transmission.
Key of remote control stuck /
double key actuation.
Batteries of remote control are flat. Have new batteries been inserted?
Valve assembly jammed,
not working, not yet fully
activated.
Filter is dirty / air inlet / outlet
opening is blocked by debris.
Windows and doors open.
Heating/cooling output has
increased.
Cooling mode is not set. Does the cooling symbol appear
Inlet temperature in cooling mode
too high.
Inlet temperature in heating mode
too low.
Drain pipe of collector reservoir
plugged / damaged.
External condensation pump or
floater defective.
Non-discharged condensate is in
the condensate drainage line.
Condensate cannot be discharged.
Does all other electrical equipment
function correctly?
function correctly?
Have approx. 5 minutes
elapsed since the restart?
Are the fans in the indoor unit and
outdoor unit working correctly?
in the area recently?
a fault?
Does the indoor unit beep when
pressing a key?
mode?
Does it function correctly in the
shade?
Does it function after removing
potential sources of interference?
Does the “Send” symbol appear
on the display?
Is the display incomplete?
Is the electrical power present at
the valve head or has the time
period of 3 minutes after the
activation passed?
Have the filters been cleaned? Clean filters.
Have structural /
usage modifications
been made?
on the display?
Is the inlet temperature ca.
+ 5 ...+ 10 °C and is the circulation
pump working?
Is the inlet temperature ca.
+ 25 ...+ 45 °C and is the
circulation pump working?
Can the condensation drain off
without any obstruction?
Is the collection tray full of water
and the pump not running?
Has the condensate drainage line
been laid on an incline and is it
unobstructed?
Are the condensate drainage lines
unblocked and is there a steady
incline? Are the condensate pump
and liquid level switch functioning
correctly?
Check the voltage and if
necessary, wait for it to come
back on.
Repair by certified service centre.
Plan for longer waiting period.
Observe temperature ranges
of indoor unit and outdoor unit.
Switch off the mains breaker and
switch it back on. Inspection by
certified service centre.
Check or clean the pump,
if necessary.
Reduce the distance to less
than 6 m and change location.
Replace remote control.
Shade the transmitter and receiver.
Signal is not transmitted
when interference sources are
operational.
Release the key / press only one
key.
Insert new batteries.
Have the valve head replaced
or wait for time period to pass.
Close windows and doors / install
additional systems.
Correct the settings for the unit.
Reduce inlet temperature.
Increase inlet temperature.
Clean the drainage pipe and
collection container.
Have pump replaced by certified
service centre.
Route the condensate drainage line
downward or clean it.
Route the condensate drainage line
downward or clean it. If the liquid
level switch or the condensate
pump is defective, have them
replaced.
14
Fault indication by flashing code
OPERATION
Red Mains voltage available Normal operating condition
Red Red Heating mode Normal operating condition
Red Green Cooling mode Normal operating condition
Red
Red
Flashing red Frost protection sensor faulty/tripped Contact specialist dealer
Flashing red Flashing red Circulation temperature sensor faulty/tripped Contact specialist dealer
On
OPERATING MODE
Alternating
Red/Yellow
Alternating
Red/Green
Flashing
yellow
Possible cause Remedial measures
Automatic heating mode Normal operating condition
Automatic cooling mode Normal operating condition
In heating mode the medium temperature is below 30 °C after 30 mins.
In cooling mode the medium temperature is above 20 °C after 30 mins.
Increase medium temperature
Decrease medium temperature
Installation instructions for qualified personnel
Important notes prior to
installation
■
Observe the operating manuals
for the indoor unit and
the chiller or heating system
when installing the entire
system.
■
The indoor units and
chillers work independently.
A connecting line between
the two is not necessary.
■
Transport the unit in its original
packaging as close as possible
to the installation location.
You avoid transport damages
by doing so.
■
Lift the unit at the corners
and not by the medium or
condensate connections.
■
The medium connection lines,
valves and connections must be
insulated against vapour density
insulation. If necessary, also
insulate the condensate line.
In dual systems with
cooling and heating modes,
the requirements of the current
Energy Savings Ordinance
(German EnEV rule ) are to be
complied with.
■
Seal off open lines against
dirt and never kink or crimp
the lines.
Installation materials
The indoor unit is attached to
the wall by a wall bracket and
4 screws (to be provided by
the customer).
Selection of installation location
The indoor unit is designed for
horizontal wall installation
above doors.
However, it can also be used in
the upper wall area (min. 1.75 m
above the floor).
Minimum clearances
■
Check the contents of
the packaging for completeness
and check the unit for visible
transport damage.
Report any damage
immediately to your contracting
party and the shipping
company.
■
Select an installation location
which allows air to flow freely
through the inlet and outlet.
(See section "Minimum
clearances").
■
Do not install the unit in the
immediate vicinity of devices
which generate intensive
thermal radiation.
Installation near thermal
radiation reduces the unit
output.
■
Avoid unnecessary bends.
This minimises the pressure loss
in the lines.
■
Make all electrical connections
in accordance with applicable
DIN and VDE standards.
■
Always attach electrical lines
properly in electrical clamps
(otherwise a fire could result).
Observe the minimum clearances
to allow access for maintenance
repair work and for
optimum air distribution.
Minimum clearances
120
120
120
Air inlet
1500
200
Air outlet
All measurements in mm
15
REMKO WLT
Installation
Connection variants
The following connection variants
for the medium,
condensate and control lines can
be utilised.
Connection variants
1
2
3
1 Connection on the wall, right
2 Connection through the wall, right
3 Connection through the wall, left
4 Connection on the wall, left
4
Bending of medium pipings
Medium pipings must only be bent
as shown below.
Bending of medium pipings
1
NOTE
Installation should only be
performed by authorised
specialists.
Unit installation
The indoor unit is attached by
means of a wall bracket, under
consideration of air discharge side
located in the lower part.
1. Mark the mounting points on
the structurally permissible
building sections according
to the dimensions of the wall
bracket.
2. If necessary, remove the break
out opening of the housing.
3. Connect the medium pipes,
electrical cables and condensate
pipe to the indoor unit as
described below.
4. Hang the indoor unit onto
the wall bracket by tilting it
back slightly and by pressing
the bottom part of the unit
against the bracket.
5. Check again to ensure that
the unit is level (Figure 5).
2
5 Connecting
Fitting the wall bracket
The wall bracket for the unit must
be attached with suitable screws
and anchors.
Connection of medium pipings
■
The connection of the lines by
the customer takes place on
the angled side of the unit.
■
For the purpose of servicing,
connections must be equipped
with shut-off valves and flow
volumes adjusted using pipe leg
regulating valves.
■
Additional automatic bleed
valves are to be provided
in the supply and return at
the installation's highest point.
■
The medium piping may not
exert any structural load on
the unit.
■
The line connections may
not generate any thermal or
mechanical stresses on the unit.
If necessary cool the piping or
support with the second tool.
1. Bend pipes downwards.
2. Then bend pipes into
the desired position.
3. CAUTION! Pipes must never
be twisted!
16
Necessary system components
Valve assembly (standard equipment)
With 2-pipe systems cold or warm
medium is fed through the register
3
in the unit and then cold or warm
air is released.
Condensate drainage connection
The control is implemented
through the 3-way valve assembly.
It comprises the electrically
actuated valve head and the valve
body. If the head is electrically
activated, it actuates the body,
which routes the medium into
the register. If the temperature is
reached then the head is switched
off and the medium is fed through
the bypass past the register.
The bypass serves to ensure
the minimum medium flow rate
for the chiller.
NOTE
The time between being fully
open and fully closed can be
approx. three minutes.
Valves for hydronic balancing
The calculated individual pressure
losses in the pipeline network
layout for each individual unit
are adjusted to the entire system
with pipe leg regulating valves to
be provided on-site. The nominal
flow rates for the medium adjust
to the necessary values as a
consequence of the pressure loss.
Anti-freeze protection
(accessories)
A water glycol mix is generally
used as medium for a cold water
system. Depending on the use to
which the glycol type and quantity
is put, the viscosity changes,
the loss in pressure increases and
the unit's cooling or heating
capacity reduces.
All system components must
be approved for use with glycol.
Diaphragm expansion vessel (MAG)
To avoid pressure fluctuations
during standstill because of
temperature changes, diaphragm
expansion vessels filled with
nitrogen (moisture neutral) must
be integrated in the system.
NOTE
No moisture can condense in
the nitrogen filler.
Safety valve
Safety valves limit excess operating
pressure due to excess warming
or overfilling of the operating
medium. The valve outlet requires
unobstructed draining into a drain
line. Applicable local disposal
ordinances must be observed if
glycol is used.
Automatic bleed valves
The unit has one or two manual
bleed valves on the collector pipe
of the register. The unit can be
bled separately after the system
has been filled. Automatic bleed
valves must also be installed
at the next highest point in
the collective lines.
CAUTION
Glycol tolerant air vent valves
are necessary when using
media that contain glycol.
Manual bleeding
Manual bleeding valve
Valve head
If the temperature falls below
the dew point, condensation will
form on the cooling fins during
cooling mode.
Below the register is a collection
tray, which must be connected
to a drain.
■
The condensate drainage line
provided by the customer is to
be installed with a minimum
incline of 2 %. (Fig. 6).
If necessary, fit vapour diffusion
tight insulation.
■
Route the condensate drainage
line of the unit freely into
the drain line. If the condensate
runs directly into a sewer
pipe, fit a trap to prevent any
unpleasant odours.
■
When operating the unit at
outside temperatures below
0 °C, ensure the condensate
line is laid to protect it against
frost. If necessary, install a pipe
heater.
■
Following installation, check
that the condensate run off is
unobstructed and ensure that
the line is durably leak tight.
6 Incline of the condensate line
2 % incline
CAUTION
During use and
disposal the product and safety
data sheets of the glycol type
which is used must be observed.
Valve body
Outlet
The condensate hose is designed
to be connected on the left-hand side
(as viewed from the front).
Inlet
17
REMKO WLT
Electrical wiring
CAUTION
All electrical installation work
is to be performed by specialist
companies. Disconnect the
power supply when connecting
the electrical terminals.
■
We recommend the customer
installing a main / repair switch
on the building close
to the indoor unit.
■
The power supply is made at
the indoor unit, a control line to
the chiller is not necessary.
■
If a condensate pump, which
is available as an accessory,
is used in conjunction with
the unit, the pump switch-off
contact switches off the power
supply or the valve if necessary.
Electrical drawings
WLT 25 / WLT 27
■
The terminal blocks for making
the connections are located
behind the cover on the right
side of the indoor unit.
Make the connection as
follows:
1. Open the air inlet guard.
2. Loosen the cover on the right
side.
3. Connect the unit with the
power supply.
See electrical drawings.
4. Re-assemble the unit.
CAUTION
WLT 45 / WLT 55 /
WLT 75 / WLT 85
Check all plugged and
clamped terminals to verify
they are seated correctly and
make a permanent contact.
Tighten as required.
18
Leak testing
Commissioning
Once the connection has been
made successfully, the leak test is
carried out.
1. Flush the system twice with tap
water.
2. Clean the sieve insert of the dirt
trap.
3. Fill the system with water
again and bleed the unit at
the manual bleed valves.
4. Adjust the test pressure to at
least 200 kPa (2.0 bar).
5. Check the connections after
a period of at least 24 hrs
for leaking water. If water is
visible, the connection has not
been properly made. Tighten
the connection or make a new
connection.
6. After a successful leak test,
remove the excess pressure
from the medium pipings if a
water-glycol mixture is used
or adjust the non-circulating
pressure to the required system
pressure.
Before commissioning
Anti-freeze protection for
the medium
If a water-glycol mixture is used,
it is to be pre-mixed before being
put in the system. The desired
concentration is then to be
checked.
Bleeding the system
■
Air may still be in the pipe
lines after the leak test. This
is carried during operation
of the circulation pump to
the next highest point or to
the cold water drain. Here it is
necessary to bleed again.
■
The non-circulating pressure
must then be adjusted to the
required system pressure.
Manual bleeding
NOTE
During manual aspiration,
escaping glycol mixtures must
be disposed of separately.
Do not feed them into
the condensate tray!
MAG
■ The preliminary pressure for
the diaphragm expansion vessel
must be adjusted individually
to the system layout,
the volume of the medium and
the installation site.
Valves for hydronic balancing
■
The calculated excess pressure
in the pipe network layout at
the individual cold water outlets
must be adjusted with the pipe
leg regulating valves.
Safety valve
■
The safety valves and their correct
function must be checked.
■
The drain line for the valves is
to be checked for function and
leak tightness.
■
Commissioning should only be
performed and documented by
specially trained personnel.
■
Observe the manuals
for the unit and all other
components when
commissioning the entire
system.
Function test of cooling mode
1. Switch the power supply on.
2. Open all shut-off valves if
necessary.
3. Switch on the chiller and
the corresponding circulation
pump. The outlet temperature
must lie between +4 and
+18 °C.
4. Use the remote control to
switch on the unit and select
the cooling mode, maximum
fan speed and lowest target
temperature.
5. Measure and record all
the required values in
the commissioning report and
check the safety functions.
6. Check the indoor unit control
system using the functions
described in the chapter
"Operation". Timer,
temperature setting, fan speeds
and changing to ventilation or
dehumidification mode.
7. Check the correct function
of the condensate line by
pouring distilled water into
the condensation tray.
A bottle with a spout is
recommended for pouring
the water into the condensation
tray.
19
REMKO WLT
Function test of heating operating
mode
1. Switch the power supply on.
2. Open all shut-off valves.
3. Switch on the heating system
and the corresponding
circulation pump. The outlet
temperature must lie between
+35 and +70 °C.
Unit dimensions
WLT 25
4. Use the remote control to
switch on the unit and select
the heating mode, maximum
fan speed and highest target
temperature.
5. Measure and record all
the required values in the
commissioning report and
check the safety functions.
298
6. Check the indoor unit control
system using the functions
described in the chapter
"Operation". Timer,
temperature setting, fan
speeds.
Final tasks
■
Reassemble all disassembled
parts.
■
Familiarise the operator with
the system.
WLT 27
WLT 45 / 55
WLT 75 / 85
880
990
1172
180
305
180
360
206
20
1450
365
215
All measurements in mm
Cooling capacity
Medium inlet
Medium nominal
Flow
volume
[m3/h]
Pressure
loss
[kPa]
5 °C 7 °C 9 °C 11 °C 13 °C
Cooling capacity
QK
[kW]QS[kW]
QK
[kW]QS[kW]QK[kW]QS[kW]QK[kW]
QS
[kW]QK[kW]QS[kW]
WLT 25 0.35 9.5 2.35 1.97 2.04 1.62 1.77 1.41 1.49 1.24 1.17 1.02
WLT 27 0.46 20.5 3.20 2.59 2.73 2.15 2.29 1.83 1.77 1.48 1.46 1.17
WLT 45 0.80 21.0 4.99 4.22 4.38 3.56 3.71 2.95 3.24 2.39 2.72 1.98
WLT 55 1.00 22.5 6.42 4.93 5.81 4.54 5.17 4.19 4.37 3.74 3.65 3.18
WLT 75 1.22 21.7 8.08 5.51 7.05 5.09 6.37 4.64 5.88 4.13 5.20 3.73
WLT 85 1.49 33.5 9.40 6.13 8.55 5.61 7.58 5.13 6.67 4.69 5.14 4.19
Air inlet temperature TK 27 °C / FK 19 °C, 0 % Glycol concentration, max. air flow
QK = Cooling capacity, total
QS = Cooling capacity, sensible
Heating capacity
Medium inlet
nominal medium
Flow
[m3/h]
rate
Pressure
drop
[kPa]
40 °C 45 °C 50 °C 55 °C 60 °C 65 °C 70 °C
Heating capacity
QH
[kW]
QH
[kW]
QH
[kW]
QH
[kW]
QH
[kW]
QH
[kW]
[kW]
WLT 25 0.35 7.0 1.59 2.28 2.60 2.95 3.33 3.67 4.07
WLT 27 0.46 18.5 2.18 2.64 3.26 3.71 4.23 4.80 5.38
WLT 45 0.80 19.0 3.54 4.35 5.17 5.98 6.86 7.72 8.61
WLT 55 1.00 21.0 4.71 5.94 7.20 8.39 9.58 10.74 11.95
WLT 75 1.22 17.8 6.17 7.36 8.75 9.99 11.40 12.58 13.92
WLT 85 1.49 27.1 7.64 9.11 10.78 12.29 14.05 15.53 17.13
Air inlet temperature TK 20 °C, 0 % Glycol concentration, max. air flow
QH = Heating capacity, total
QH
21
REMKO WLT
Technical data
Series
Operating mode
Nominal cooling capacity
Nominal heating capacity
1)
2)
kW 2.04 2.73 4.38 5.81 7.05 8.55
kW 4.07 5.38 8.61 11.95 13.92 17.13
WLT 25 WLT 27 WLT 45 WLT 55 WLT 75 WLT 85
Chilled water wall unit for 2-pipe system
Operating range (room volume), approx. m³ 60 90 140 190 230 280
Setting range, room temperature °C +16 to +30
Operating range - indoor unit °C +16 to +35
Air flow rate per speed setting m³/h
Sound pressure level
3)
dB (A) 26/30/33 28/31/36 33/36/38 35/37/40 38/40/42 39/42/43
295/330/360 320/365/415 605/680/735 705/795/865
880/1100/1270
1090/1220/1400
Power supply V/Hz 230/1~/50
Protection class IP X0
Electr. nominal power consumption
Electr. nominal current consumption
1)
kW 0.03 0.03 0.06 0.06 0.08 0.09
1)
A 0.12 0.14 0.24 0.27 0.32 0.41
Operating medium Water; max 35 % ethylene-glycol, max. propylene-glycol max. 35 %
Operating limits, medium - cooling °C +4 to +18
Operating limits, medium - heating °C +35 to +70
Max. operating pressure, medium kPa 600
Minimum supply temperature, heating °C +40
Nominal flow rate, medium - cooling
1)
m³/h 0.35 0.46 0.80 1.00 1.22 1.49
Nominal flow rate, medium - heating 2)m³/h 0.35 0.46 0.80 1.00 1.22 1.49
Rated pressure drop, internal
Rated pressure drop, internal
1)
2)
kPa 9.5 20.5 21.0 22.5 21.7 33.5
kPa 7.0 18.5 19.0 21.0 17.8 27.1
Medium connection, inlet mm 12 15 18
Medium connection, outlet mm 12 15 18
Medium content l 0.81 0.96 1.07 1.96 2.41 2.93
Condensate drainage connection mm 16.5 24.0
Dimensions - height mm 298 305 360 360 365 365
width mm 880 990 1172 1172 1450 1450
depth mm 180 180 206 206 215 215
Weight kg 8.6 10.4 16.0 17.6 24.1 25.1
Operating weight, approx. kg 9.4 11.4 17.0 19.6 26.5 28.0
Serial number 467... 468... 469... 470... 472... 473...
EDP no. 1611725 1611727 1611745 1611755 1611775 1611785
1) Air inlet temperature TK 27 °C / FK 19 °C, medium inlet 12 °C, medium outlet 7 °C, 0 % glycol concentration, max. air flow rate
2) Air inlet temperature TK 20 °C, medium inlet 70 °C, medium outlet 60 °C, 0% glycol concentration, max. air flow rate
3) Distance 1m free field conditions
22
Exploded view WLT 25 to 85
7
9
12
5
2
Spare parts list
Description
No.
1 Air inlet guard
2 Circulating air filter, set
3 Receiver board
4 Front panel
5 Swing motor
6 Condensate tray / outlet fins
7 Back wall
8 Condensate hose
9 Fin register
10 Air circulation probe
11 Fin register probe
12 Fan wheel
13 Fan motor, recirculation
Control board 1105756 1105756 1105778 1105778 1105801 1105801
14
Valve head 1105787 1105787 1105787 1105787 1105787 1105787
15
Valve body 1105789 1105789 1105789 1105789 1105802 1105802
16
IR remote control 1105761 1105761 1105761 1105761 1105761 1105761
17
Spare parts not illustrated
Capacitor, culating fan 1105764 1105764 1105782 1105784 1105803 1105803
15
13
6
WLT 25 WLT 27 WLT 45 WLT 55 WLT 75 WLT 85
1105750 1105765 1105772 1105772 1105790 1105790
1105760 1105771 1105781 1105781 1105791 1105791
1105757 1105757 1105779 1105779 1105792 1105792
1105751 1105766 1105773 1105773 1105793 1105793
1105759 1105759 1105759 1105759 1105794 1105794
1105753 1105768 1105775 1105775 1105795 1105795
1105752 1105767 1105774 1105774 1105796 1105796
1105785 1105785 1105786 1105786 1105797 1105797
1105806 1105807 1105776 1105783 1105798 1105799
1105763 1105763 1105763 1105763 1105763 1105763
1105762 1105762 1105762 1105762 1105762 1105762
1105755 1105770 1105777 1105777 1105809 1105809
1105758 1105758 1105780 1105780 1105800 1105805
16
17
4
2
14
10
11
3
8
1
We reserve the right to modify
the dimensions and constructional
design as part of the ongoing
technical development process.
When ordering spare parts, please state the EDP no. and unit number (see name plate)!
23
REMKO INTERNATIONAL
... and also right in your neighbourhood!
Take advantage of our experience and advice
REMKO GmbH & Co. KG
Klima- und Wärmetechnik
Consultation
Thanks to intensive training,
our consultants are always
completely up-to-date when
it comes to technical expertise.
This has given us the reputation
of being more than just an
excellent, reliable supplier:
REMKO, a partner who
helps to solve problems.
Sales
REMKO offers not just a well-
established sales network both
nationally and internationally, but
also has exceptionally highly-
qualified sales specialists.
REMKO employees in the
field are more than mere
salespeople: above all, they must
be advisers to our customers
in air conditioning and heating
technology.
Customer service
Our units operate precisely
and reliably. However, in the event
of a fault REMKO customer
service is quickly on the scene.
Our comprehensive network
of experienced dealers guarantees
quick and reliable service.
Im Seelenkamp 12 D-32791 Lage
Postfach 1827 D-32777 Lage
Telephone +49 5232 606-0
Fax +49 5232 606-260
e-mail info@remko.de
Internet www.remko.de
Hotline
Air conditioning and
heating technology
+49 5232 606-0
Export
+49 5232 606-130
We reserve the right to make technical changes and provide no warranty as to the accuracy of this data!
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