Schako NBS Series Installation instructions manual

INSTALLATION, MOUNTING AND
MAINTENANCE
SCHAKO | Ferdinand Schad KG Phone [phone]
Steigstrasse 25-27 Fax [phone]
D-78600 Kolbingen www.SCHAKO.de | [email protected]
GENERAL INFORMATION
--- Prior to commissioning of this device, please read completely through
this manual. Please observe in particular the regulations and
operating instructions containing the hazard symbols and safety
signs. Non-observance can result in damage to the device and
personal injuries.
--- If, after reading through the manual, you have further questions,
please contact the manufacturer or the local sales office.
--- The inspection, installation, connection and commissioning of the
device must be carried out by qualified skilled personnel only in
compliance with the current regulations.
--- Do not spray the device with liquids.
--- Do not operate the device with wet or moist hands.
--- Do not change any control or safety elements without prior approval
by the manufacturer or the local sales office.
--- Electric and hydraulic connections and their correct functioning are
the responsibility of the installer.
WARRANTY
The device warranty will be for two years starting from the handover date
and shall apply to all production faults. Electric components are excluded
from the device warranty. However, they are covered by the
corresponding warranty of the relevant manufacturer
Also excluded from the warranty is damage to the device unit caused by
components that are not part of the device itself. The warranty only
covers the return and replacement of defective materials.
LIMITATION OF LIABILITY
SCHAKO shall not give any warranty for damage resulting from:
--- Improper use caused by ignoring the instructions given in this manual:
--- Non-observance of the operating conditions of the device.
--- Installation and maintenance by personnel without proper
qualification.
--- Improper use of the device or operation under conditions not
conforming to the manual.
--- Use of spare parts that are not original spare parts.
EXPLANATION OF SYMBOLS
Hazard warning
Important information
Caution, electric power
Safety information
Recycling
NBS
Fan coil unit

NBS – Fan coil unit
INSTALLATION, MOUNTING AND MAINTENANCE
Contents
Construction subject to change.
No return possible. Version: 03.03.21 | Page 2
CONTENTS
Identification of the delivered model ................................................................................................................................. 3
Installation and commissioning .......................................................................................................................................... 4
Installation .......................................................................................................................................................................... 6
Maintenance ..................................................................................................................................................................... 15
Spare parts list NBS-100 ................................................................................................................................................... 18
Spare parts list NBS-150 ................................................................................................................................................... 19
Troubleshooting ................................................................................................................................................................ 20

NBS – Fan coil unit
INSTALLATION, MOUNTING AND MAINTENANCE
Identification of the delivered model
Construction subject to change.
No return possible. Version: 03.03.21 | Page 3
IDENTIFICATION OF THE DELIVERED MODEL
The NBS series of air-conditioning units consists of two model
series: the modular NBS-100 and the compact NBS-150.
Register (a): Option of installing a single register (cooling or
heating) or two registers (cooling and heating). They consist
of copper pipes, aluminium ribs, a ventilation system and a
steel frame. The water connections are located on the right-
hand or left-hand side.
Motorised fan (b): Double-sided intake-operated dynamically
balanced centrifugal blower with forward bent blades. With 5
speed levels (NBS-100) and with 3 speed levels (NBS-150).
Filter (c): Has filter of efficiency ISO Coarse (ISO 16890) and
consists of a galvanised steel frame and a synthetic filter
medium.
Housing of the -100 series (d): Made of of galvanised sheet
steel profiles and plates and heat and sound insulation 12
mm in thickness. It is equipped with mounting brackets for
ceiling fastening.
Housing of the -150 series (e): Consists of aluminium profiles,
galvanised sheet steel, plastic corner pieces and a
circumferential seal to guarantee tightness. The covers in
sandwich design consist of a heat and sound insulation of 28
mm. The vibration dampers should be dimensioned on the
basis of the weight of the device, divided by the number of
fastening points.
NBS-100
NBS-150
DIMENSIONS
NBS-100
NBS-150
Model B (mm)
-100-1 680
-100-2 1150
-100-3 1660
-150-1 874
-150-2 1374
-150-3 1824

NBS – Fan coil unit
INSTALLATION, MOUNTING AND MAINTENANCE
Identification of the delivered model
Construction subject to change.
No return possible. Version: 03.03.21 | Page 4
INSTALLATION AND COMMISSIONING
OPERATING CONDITIONS
Prior to installation or commissioning of the device, the
following operating conditions must be observed:
--- Coolant or heating fluid: water or glycols (ethylene or
propylene) at a concentration below 60%.
--- Water inlet temperature: from 6 to 45°C.
--- Max. air outlet temperature: 40 °C
--- Max. operating pressure: 8 bar
--- Maximum relative humidity in the environment: 60%
To prevent deposits and corrosion, the quality of
the water for filling the registers must comply with
regulations VDI 2035 and DIN 50930.
MATERIAL RECEPTION
Upon reception of the materials, the components must be
carefully checked, in order to guarantee that no transport
damage has taken place.
Moreover, the dimensions, composition and number of the
identification sticker must be checked as to whether they are
as ordered.
Identification label
Designation
Operating voltage power consumption
Should the device exhibit production-related
damage, please contact your local sales office prior
to installation.
To prevent possible damage during transport, the devices will
be delivered ex works on pallets (that correspond to the
particular weight and dimensions) wrapped with tapes and
transparent plastic film. It is recommended leaving this
protection in place until the device is commissioned.
TRANSPORT, LIFTING AND HANDLING
Transport and handling of the unit shall take place in the
position in which the unit is to be built in later on, unless
expressly stated otherwise on the unit.
Transport, unloading and lifting of the unit shall take place
with the necessary care and using tools that are appropriate
for the weight and dimensions.
Weights (kg)
Device
unit
Plenum box
(300 mm)
Mixing
unit
Cooling
register
Heating
register
-100-1 36 9 19 1.9 1.0
-100-2 56 13 24 3.4 1.7
-100-3 75 17 30 5.0 2.6
-150-1 57 11 20 3.5 1.7
-150-2 77 15 26 5.8 3.0
-150-3 98 19 33 7.8 4.0
The unit shall only be kept in position or moved by
holding on to the housing. The weight must not rest
on the condensate pan or the water connections.
SCHAKO cannot be held liable for damage to the
unit caused by improper handling or handling not
mentioned here, loading or unloading.
Please separate and recycle the packaging materials
in accordance with regulations.

NBS – Fan coil unit
INSTALLATION, MOUNTING AND MAINTENANCE
Identification of the delivered model
Construction subject to change.
No return possible. Version: 03.03.21 | Page 5
STORAGE
If the device is not installed immediately after its reception, it
must be stored according to the following instructions:
--- The device must be stored at a dry, clean, safe location
where no damage to the device can occur, i.e., outside
corrosive atmospheric influences.
--- Leave the protections attached ex works (film, tapes,
pallets, etc.) on the device, unless they have already been
removed beforehand.
--- Cover the device with tarpaulins, in order to protect it
from dust, moisture and extreme temperatures.
--- Rotate the fan rotor at regular intervals.
--- Protect the electric components adequately. In case of
storage over a prolonged period of time, remove the
electric unit and store it at a dry location.
--- Entries, openings and pipes must be hermetically sealed
with dust caps.
MOUNTING POSITION
The devices must not be installed in places with extreme
moisture (e.g. laundries or swimming pools), with high dust
formation, outdoors or in places subject to explosion hazards.
For correct installation, the following instructions must be
followed:
--- Make sure that places that are intended as openings for
air admission and air discharge are free of pipes, electric
cables, crossbeams, stands, etc.
--- Install the unit at a site that has good air quality.
--- Make sure that wall and ceiling correspond to the weight
of the device and also allow correct mounting of the
fastening elements.
--- Make sure that there is sufficient clearance distance to
the wall and no obstacles are present on the outside of
the wall that could impair optimum air circulation (plants,
furniture, curtains, etc.).
--- Install the device such that the air flow is not directed
directly at persons staying there.
--- The installation site must have sufficient space and the
necessary resources for carrying out mounting and
maintenance activities of all device components.
Recommended size for inspection opening (mm)
-100-1 880 x 915
-100-2 1350 x 915
-100-3 1860 x 915
-150-1 1074 x 1099
-150-2 1574 x 1099
-150-3 2024 x 1099

NBS – Fan coil unit
INSTALLATION, MOUNTING AND MAINTENANCE
Installation
Construction subject to change.
No return possible. Version: 03.03.21 | Page 6
INSTALLATION
The NBS units have been designed for mounting on the
ceiling by means of anchoring elements (e.g. set screws). To
avoid damage to the unit and structure-borne noise
transmission, it is also recommended using vibration
dampers.
The device must be mounted at an inclination of
0.5 % - 1 % to ensure draining of the water of
condensation. Non-observance of the device
inclination may result in serious damage to the
device and cause water to enter the air ducts.
Check whether the condensate pan is completely
emptied by partly filling it.
The threaded rods, screws or vibration damping
fixing elements required for installation are not
included in the delivery. The vibration dampers
should be dimensioned on the basis of the weight
of the device, divided by the number of fastening
points. SCHAKO cannot be held liable for damage
resulting from faulty installation or the use of
unsuitable fastening devices.
Before making electric or hydraulic connections, the
power supply must be disconnected and secured
against being switched on again.
For the installation of the device, use adequate
tools, devices and materials and observe the safety
regulations and other current regulations.
Minimum distance to obstacles > 300 mm
Minimum distance to obstacles > 400 mm
Alternatives:
Condensate drain
Condensate drain

NBS – Fan coil unit
INSTALLATION, MOUNTING AND MAINTENANCE
Installation
Construction subject to change.
No return possible. Version: 03.03.21 | Page 7
CONNECTING THE SUB-ASSEMBLIES
Before assembling the individual sub-assemblies, their
condition must first be checked.
This is followed by arranging the modules in the same order
in which they are to be assembled. This is followed by moving
them next to each other, arranging them and finally joining
them using the screws and nuts enclosed with the unit by
passing them through the lateral or bottom openings of the
modules.
As standard, i.e., without express order, the assembly of the
sub-assemblies takes place ex works.
NBS-100
NBS-150
Flexible connections / flange
Flexible connections that prevent a transmission of vibrations
to the system can be additionally delivered as an option.
Flange
NBS-100
NBS-150
Flexible connections
NBS-100
NBS-150
Model B B1 Number
of bores
(mm) (mm)
-100-1 735 290 10 (+4 METU)
-100-2 1205 350 12 (+4 METU)
-100-3 1715 312 16 (+4 METU)
-150-1 857
- 4
-150-2 1357
-150-3 1807
Suction unit flange NBS-100 blow box
Connecting plate with spigot
Flexible connections
connection
Suction unit flange NBS-150 blow box
connection
Connecting plate with spigot
Flexible connections

NBS – Fan coil unit
INSTALLATION, MOUNTING AND MAINTENANCE
Installation
Construction subject to change.
No return possible. Version: 03.03.21 | Page 8
Supply air and return air boxes
In the NBS-100, the plenum boxes are connected as follows:
--- Place the plenum box in front of the main element (flange
or flexible connection) it is supposed to be connected to
and align them.
--- Screw down both, making sure to obtain a firm
connection.
In the NBS-150, the plenum boxes, after prior alignment, are
mounted by screwing them to the flange of the main unit.
NBS-100
NBS-150
B (mm) B1 (mm) bores
-100-1 762 290 10
-100-2 1232 350 12
-100-3 1742 312 16
150-1 880
- 4
150-2 1380
150-3 1830
Before connecting the plenum boxes, make sure
that the seal at the plenum box frame is in good
condition.
Upon customer request, the plenum box of the
NBS-100 and NBS-150 can be delivered pre-installed
ex works.
Mixing unit
NBS-100
NBS-150
L (mm) Front damper Lateral damper
-100-1
370
HK 401 x 201
HK 201 x 201
-100-2 HK 711 x 201
-100-3 HK 894 x 201
-150-1
1180
HK 503 x 201
HK 252 x 252
-150-2 HK 797 x 201
-150-3 HK 1003 x 201
Connecting the air ducts
The NBS (if specified in the
order) is equipped with a
mounting frame for attaching
the air duct. For plenum boxes
with connection spigot, the air
ducts are mounted by means
of clamps, fishplates or the like.
To give the system greater tightness, it is
recommended using seals on the air ducts.
Front damper NBS-100
Lateral
damper
Mixing unit
Front damper
Lateral damper
NBS-150

NBS – Fan coil unit
INSTALLATION, MOUNTING AND MAINTENANCE
Installation
Construction subject to change.
No return possible. Version: 03.03.21 | Page 9
Silencer
B (mm) H (mm) D (mm) N L (mm)
-100-1 739
341.0
100 4
1000
1250
1500
1750
2000
2250
2500
3000
200 2
-100-2 1209 100 8
200 4
-100-3 1719 100 11
200 6
-150-1 857
463.5
100 5
200 3
-150-2 1357 100 9
200 5
-150-3 1807 100 12
200 6
N = maximum number of baffles | S = gap width
HYDRAULIC CONNECTIONS
Upon customer request, the water
connection to the registers can be
established in air flow direction on
the left or right-hand side of the
unit. The water inlet is at the
bottom and the water outlet at
the top.
The pipe connections of the device should be
insulated on-site to prevent the formation of
condensates.
The register threads correspond to standard EN
10226:
Heating: external pipe thread EN 10226 R1/2.
Cooling: external pipe thread EN 10226 R 3/4.
The registers are equipped ex works with a manual bleed
valve. Any further devices for ventilation must be provided
on-site.
If flexible connections are to be used, observe the bend
radius specified by the manufacturer.
When making the hydraulic connections, suitable
tools must be used, to avoid a rotation or other
movements of the register connection and
excessive tightening of the connections.
Avoid putting the register connections under stress
as a result of the weight of the connection pipes.
If the unit is to be installed at a
location having temperatures
below zero degrees, glycol must
be admixed to the coolant in a
suitable ratio, to prevent the
coolant from becoming frozen.
Please note that the use of an antifreeze results in a loss in
efficiency of the register.
Use the ventilation devices to ensure that no air
remains in the water circuit.
For operation with external air, appropriate
measures must be taken on-site to guarantee that
the registers cannot freeze.
NBS
Silencer

NBS – Fan coil unit
INSTALLATION, MOUNTING AND MAINTENANCE
Installation
Construction subject to change.
No return possible. Version: 03.03.21 | Page 10
ELECTRIC CONNECTIONS
Prior to the electrical installation, you have to make sure that
the rated mains voltage is 230 V AC, 50/60 Hz and is single-
phase.
SCHAKO recommends the exclusive use of copper cables,
since the device connections have not been designed for
accommodating other types of cables. If they are used
nevertheless, galvanic corrosion or generation of heat could
take place at the connection point, thus resulting in damage
to the unit.
The electric connections must be made by qualified
electricians only, observing the current standards and
regulations as well as the low-voltage regulations.
Connect the NBS via an earthing cable.
SCHAKO cannot be held liable for faulty electrical
connections or if the power supply cable is replaced
with a different cable having different
characteristics.
According to DIN EN 60335-1, an all-pole
disconnecting device must be provided by the
customer,
Product size -100-1 -100-2 -100-3 -150-1 -150-2 -150-3
Supply voltage 230 V AC, 50/60 Hz single-phase 230 V AC, 50 Hz single-phase
Type of insulation Type B Type B
Type of motor 5 speeds 3 speeds
Type of protection IP20 IP55
Max. allowed current intensity (A) 1.20 A 2.70 A 3.70 A 1x 3.40 A 2x 3.40 A 3x 3.40 A
Air temperature range (°C) -20 ˚C < T < +40 ˚C -20 ˚C < T < +40 ˚C

NBS – Fan coil unit
INSTALLATION, MOUNTING AND MAINTENANCE
Installation
Construction subject to change.
No return possible. Version: 03.03.21 | Page 11
NBS-100-1
NBS-100-2
NBS-100-3

NBS – Fan coil unit
INSTALLATION, MOUNTING AND MAINTENANCE
Installation
Construction subject to change.
No return possible. Version: 03.03.21 | Page 12
NBS-150-1
NBS-150-2

NBS – Fan coil unit
INSTALLATION, MOUNTING AND MAINTENANCE
Installation
Construction subject to change.
No return possible. Version: 03.03.21 | Page 13
NBS-150-3

NBS – Fan coil unit
INSTALLATION, MOUNTING AND MAINTENANCE
Installation
Construction subject to change.
No return possible. Version: 03.03.21 | Page 14
ACCESSORIES
Temperature controls
The temperature controls are mounted in accordance with
the selected model. This is why the instructions enclosed with
each model must be followed. However, in order to achieve
optimum measurement by the sensors, the following basic
information should be observed:
--- Do not mount the temperature control close to or above a
heat source (direct sunlight, lamps, television sets,
radiators, etc.), in places with draught air or directly
opposite to an air diffuser grille.
--- Temperature controls must be mounted at least 1.5
metres above the floor.
--- Mounting temperature controls on walls toward the
outdoors should be avoided.
Before drilling, make sure that no power, water or
gas lines are present where the temperature
controls are to be mounted.
Valves
Valves ordered as accessories are supplied loose. Please
observe the attached mounting instructions of the
manufacturer. On-site insulation of valves and connections.
Actuators
The installation of the actuators depends on the selected
model. Please follow the instructions enclosed with each
model.
Condensate pump
The installation of the condensate pump depends on the
selected model. Please follow the instructions enclosed with
each model.
Upon customer request, the condensate pump can be
installed ex works.
Faulty mounting of the sub-assemblies and of the
accessories of the unit can result in a substantial
power loss of the unit.
If the main water drain is above the level
of the NBS drain, a condensate pump has to be
mounted.
CHECKS
Prior to commissioning, the following items must be checked
or guaranteed:
--- The air flow through the filters is not impaired by foreign
material (paper, packaging residues, etc.).
--- The current consumption of the device is not higher than
the power of the electric circuit it is connected to.
--- The electrical properties of the device correspond to those
of the electrical connection circuit.
--- Electrical connections were made correctly.
--- Hydraulic connections were tightened properly and
exhibit no leaks.
--- The drain pipe of the condensate pan is not clogged.
--- Connecting and fastening elements have been sufficiently
tightened.
--- There is a sufficient gradient for the condensate pan to be
emptied correctly. (Check whether it is completely
emptied by partly filling it).
After carrying out the items described above, the
correct installation of the unit must be checked.
During commissioning itself, the following items must be
guaranteed:
--- The connecting and fastening elements have been
sufficiently tightened.
--- The motorised fan does not exhibit any vibrations or
excessive noise.
--- The condensate pan is emptied correctly.
--- In heating mode, the temperature of the discharged
supply air is not above 40°C.

NBS – Fan coil unit
INSTALLATION, MOUNTING AND MAINTENANCE
Maintenance
Construction subject to change.
No return possible. Version: 03.03.21 | Page 15
MAINTENANCE
When performing maintenance activities, it is
recommended wearing personal protective
equipment, in order to avoid cuts and other injuries
produced by sharp and pointed parts.
For reasons of safety, the power supply and
hydraulic circuit must be disconnected and secured
against being switched on again prior to any
maintenance activity. If the unit was operated in
heating mode, you have to wait until the register
has cooled down.
DISASSEMBLING THE UNITS
If the maintenance area as described in Mounting position is
provided, the maintenance and replacement work should
take place according to the following instructions, without
having to hang the device:
NBS-100 (modular)
1. Remove the connection screws of the top and bottom
covers.
2. Take out the module due for maintenance.
3. Mounting takes place in reverse order after completing
maintenance.
NBS-150 (compact)
1. Remove the attachment strip of the sandwich panel using
the screwdriver.
2. The module due for maintenance is accessible, from which
the sandwich panel can be taken out from the device
(inner sheet metal, insulation and outer sheet metal).
After removing the lower panel, free access to the unit is
made.
3. Mounting takes place in reverse order after completing
maintenance.
For maintenance, service, retrofitting, etc.,
inspection openings in sufficient number and size
must be provided on site. As given in Mounting
p
osition .
If the distance between the ceiling and the topside
of the unit is so small that the top cover cannot be
taken off, the entire NBS must be taken down. In
this case, follow the above instructions.
It is recommended recycling the device components
at the end of service life of the device as much as
possible or reuse them.
Components that cannot be recycled must be
properly disposed of by an authorized disposal
company in accordance with current legal
regulations.

NBS – Fan coil unit
INSTALLATION, MOUNTING AND MAINTENANCE
Maintenance
Construction subject to change.
No return possible. Version: 03.03.21 | Page 16
REGISTERS
To guarantee the technical characteristics of the device, the
registers and heat exchangers must be kept in good clean
condition. To ensure this, the following maintenance
activities must be carried out:
--- Check the condition of the register at least each time the
filter is changed.
--- Should the register be dirty, clean it by spraying it with
water or with compressed air or by suction.
--- If there are larger differences in distance between the
ribs, they must be "combed".
--- Ventilate the hydraulic circuits of the register. In doing so,
watch out for possible leaks of the hydraulic system.
It is not the manufacturer's strategy to give special
recommendations for the water treatment (contact
a company specialised in water treatment).
The use of untreated or unsuitable water may result
in excessive soiling of the register pipes (earth and
mud deposits, corrosion, etc.), which may have a
considerable effect on the heating capacity of the
unit and cause material damage that cannot be
undone.
When using untreated water or water that has been
treated improperly, the manufacturer or his
representative cannot be held liable.
MOTORISED FAN
The motorised fan does not require any special maintenance,
as it is equipped with self-lubricating bearings. However, the
blades and the rotor of the motor must be checked at regular
intervals as to whether they are free of dirt. If required, they
are cleaned with compressed air.
If the operating conditions of the fan change
(speed, pressure, temperature, etc.), consult
SCHAKO's local sales office as to whether the unit
can still be safely operated under these conditions.
CONDENSATE PAN
Twice a year, the condensate pan must be checked for
formation of algae, to prevent possible clogging of the drain
pipe. Check whether the pan is completely emptied by partly
filling it.
NBS-100 (modular)
To clean the condensate pan, remove the plate attached to
the bottom side of the motorised fan unit.
NBS-150 (compact)
To clean the condensate pan, remove the lateral plate
attached to the opposite side of the register hydraulic
connections.
When decommissioning the unit or shutting it down
for a longer period in winter, the water must be
drained from the unit, in order to avoid damage to
the register due to the formation of ice. If you want
to use antifreezes, you must first determine the
freezing point.
Any maintenance work and intervals depend on the
valid standards and guidelines, e.g.: VDI 6022.

NBS – Fan coil unit
INSTALLATION, MOUNTING AND MAINTENANCE
Maintenance
Construction subject to change.
No return possible. Version: 03.03.21 | Page 17
FILTER
To prevent a pressure drop in the device, the filters must be
replaced at regular intervals. This is why you always should
have replacement filters ready, in order to avoid longer
downtimes or operation without filters.
The service life of the filter depends on its efficiency and the
dirt particles deposited there.
Removal of the filters from the bottom side of the device:
First turn the supporting elements (1) and then pull out the
filters using the handles (2) provided for this purpose in the
filters.
Removal of the filters from the lateral or top side of the
device: Pull out the filters using the handles provided for this
purpose in the filters.
Filter components
Filter removal
upwards and
downwards
Filter removal
sideways
St. Dimensions St. Dimensions
-100-1 2 678x148x10 2 339x295x10
-100-2 2 1146x148x10 2 573x295x10
-100-3 2 1656x148x10 3 552x295x10
-150-1 2 796x198x10 2 398x395x10
-150-2 2 1294x198x10 3 431x395x10
-150-3 2 1744x198x10 3 581x395x10
The filters are sectioned, which facilitate maintenance
activities.
If the space for removing filters is limited, the filters can be
removed in parts.
SCHAKO recommends a bimonthly check at high-
medium air quality and a monthly check at low air
qualities.

NBS – Fan coil unit
INSTALLATION, MOUNTING AND MAINTENANCE
Spare parts list NBS -100
Construction subject to change.
No return possible. Version: 03.03.21 | Page 18
SPARE PARTS LIST NBS-100
Article Model Reference
1
1.1 Motorised fan
-100-1
-100-2
-100-3
107595
107596
107597
1.2 Capacitor
-100-1
-100-2
-100-3
102114
105708
105708
2 El. plenum box (all) 102714
3 Cooling register
-100-1
-100-2
-100-3
104331
104332
104333
4 Heating register
-100-1
-100-2
-100-3
104328
104329
104330
5 Filter
-100-1
-100-2
-100-3
(enquire)
(enquire)
(enquire)
6 Valve (all) (enquire)
7 Actuator (all) (enquire)
8
9
Flexible connection spigot
Supply air/return air
-100-1
-100-2
-100-3
(enquire)
(enquire)
(enquire)
10 Flange
-100-1
-100-2
-100-3
(enquire)
(enquire)
(enquire)
11 Supply air box (all) (enquire)
12 Return air box (all) (enquire)
13 Silencer (all) (enquire)
14 Mixing unit (all) (enquire)
15 Multi-leaf damper
-100-1 Front.
-100-2 Front.
-100-3 Front.
(all) lateral
0620_0114
0620_0432
0620_0814
0620_0000

NBS – Fan coil unit
INSTALLATION, MOUNTING AND MAINTENANCE
Spare parts list NBS -150
Construction subject to change.
No return possible. Version: 03.03.21 | Page 19
SPARE PARTS LIST NBS-150
Article Model Reference
1 1.1 Motorised fan -150 107594
1.2 Capacitor -150 109841
2 El. plenum box (all) 102714
3 Cooling register
-150-1
-150-2
-150-3
104033
104035
104037
4 Heating register
-150-1
-150-2
-150-3
104034
104036
104038
5 Filter
-150-1
-150-2
-150-3
(enquire)
(enquire)
(enquire)
6 Valve (all) (enquire)
7 Actuator (all) (enquire)
8
9
Flexible connection spigot
supply air / return air
-150-1
-150-2
-150-3
(enquire)
(enquire)
(enquire)
10 Flange
-150-1
-150-2
-150-3
(enquire)
(enquire)
(enquire)
11 Supply air box (all) (enquire)
12 Return air box (all) (enquire)
13 Silencer (all) (enquire)
14 Mixing unit (all) (enquire)
15 Multi-leaf damper
-150-1 Front.
-150-2 Front.
-150-3 Front.
(all) lateral
0620_0623
0620_0619
0620_0944
0620_0570

NBS – Fan coil unit
INSTALLATION, MOUNTING AND MAINTENANCE
Troubleshooting
Construction subject to change.
No return possible. Version: 03.03.21 | Page 20
TROUBLESHOOTING
Problem Possible cause Solution
Unit is not working. Power supply missing. Establish power supply.
Residual current device switch was
tripped.
Please inform the customer service.
The unit does not cool or heat
sufficiently.
Air filter dirty or clogged. Please clean the air filter.
Air or volumetric flow insufficient. Select a higher speed.
Motorised fan is not working. Please inform the installer.
Air inlet and outlet of the inner unit
clogged.
Remove foreign material and clean the unit.
Air in the interior of the register. Ventilate the register Please inform the
installer.
Nominal value of the temperature
control unit has not been set correctly.
Change the nominal value.
Unfavourable installation of the
temperature controller.
Install the temperature controller in a
different place
The unit is losing water The unit has not been installed with the
correct inclination.
Please inform the installer.
Water is draining from the condensate
pan.
Please inform the installer.
Condensate pan flows over. Check whether the drain is maybe clogged.
The water circuit of the register is
leaking.
Please inform the installer.
Register damaged. Please inform the installer.
Control unit effects continuous starts
and stops
Unfavourable installation of the
temperature controller.
Install the temperature controller in a
different place
Temperature deviations of the coolant
or heating fluid.
Please inform the installer.
There are different units with local
control elements that use coolant or
heating fluid of the same circuit.
Please inform the installer.
The control is connected incorrectly. Interrupt the power supply of the unit and
inform the installer.
The unit is working with too much noise The air intake or air blow openings or
the lines are clogged.
Remove foreign material and clean the unit.
Fan impeller imbalanced. Please inform the installer.
Filter dirty or clogged. Clean or replace the filter.
Insufficient air throughput Filter dirty or clogged. Clean or replace the filter.
Housing interior or air inlet clogged. Remove foreign material and clean the unit.
Excessive air leakage Filter badly installed. Mount filter again (tighten fastening clamp)
Check for tight fit.
Inspection covers are improperly
assembled
Inspect the mounting and ensure a tight fit
of the covers.