Schako DISA-W Installation instructions manual

Ferdinand Schad KG
Steigstraße 25-27
D-78600 Kolbingen
Telephone [phone] - 980 - 0
Fax [phone] - 980 - 200
[email protected]
www.schako.de
Installation, Mounting and
Maintenance
DISA-W

Contents
Construction subject to change. No return possible!
Installation, Mounting and Maintenance DISA-W
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Safety instructions ............................................................................................................................... 3
General information ................................................................................................................................................................... 3
Warranty ...........................................................................................................................................3
Recycling ..........................................................................................................................................3
General information ..............................................................................................................................4
Identification of the delivered model .......................................................................................................................................... 4
Function ..................................................................................................................................................................................... 4
Installation and commissioning ................................................................................................................5
Operating conditions .................................................................................................................................................................. 5
Material reception ...................................................................................................................................................................... 5
Transport, lifting and handling ................................................................................................................................................... 5
Storage ...................................................................................................................................................................................... 5
Installation ................................................................................................................................................................................. 6
Mounting ................................................................................................................................................................................... 6
Hydraulic connections ............................................................................................................................................................... 7
Connecting the air ducts ............................................................................................................................................................ 7
Mounting accessories ................................................................................................................................................................ 8
Adjustment of the air deflection blades ...................................................................................................................................... 8
Checks ....................................................................................................................................................................................... 8
Maintenance ......................................................................................................................................9
Disassembling the units ............................................................................................................................................................. 9
Air ducts and plenum box .......................................................................................................................................................... 9
Registers .................................................................................................................................................................................... 9
Grilles ........................................................................................................................................................................................ 9
Checking the primary volumetric flow ....................................................................................................... 10
Troubleshooting ................................................................................................................................ 11

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Safety instructions
Prior to installation and commissioning of this device, please
read completely through this manual. Please observe in partic-
ular the regulations and operating instructions containing the
hazard symbols and safety signs. Non-observance can result
both 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.
General information
SCHAKO shall not give any warranty for damage resulting from:
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 defec-
tive materials.
Recycling
- The inspection, installation, hydraulic connection and
commissioning of the device must be carried out by qual-
ified skilled personnel only in compliance with the current
regulations.
- Electric and hydraulic connections and their correct func-
tioning are the responsibility of the installer.
- Do not change any control or safety elements without pri-
or approval by the manufacturer or the local sales office.
- 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.
It is recommended recycling the components of
the device
at the end of the device service life as completely
as possible
or use them for a different purpose.
Components that cannot be recycled must be
properly disposed of by an authorized disposal
company in accordance with current legal regula-
tions.
It is recommended keeping this manual at a safe lo-
cation after installation and use it for future mainte-
nance activities.
Hazard warning
Important information
Safety information
Recycling

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General information
Identification of the delivered model
The wall induction diffuster type DISA-W is available in four dif-
ferent nozzle configurations: A, B, Cund D, and different device
lengths. To regulate the air flow direction, it is possible to use
air deflection blades (individually or globally).
Housing (1): Galvanised sheet steel, with 1 or 2 connection
pipes DN 98, 123 (standard) and ø148 mm, position of connec-
tion pipes horizontal.
Register (2): Vertical 2-pipe (-H, standard) or 4-pipe register (-
HT, optional) for cooling and heating. The registers consist of
copper pipes 12 mm in outer diameter, aluminium ribs, a diffus-
er system and a steel frame.
Grille (3): Possible designs: perforated sheet grille made of gal-
vanised sheet steel (perforated sheet grille models:-SR, -SQ, -
RE and -OB) made of extruded aluminium profile (-PA). Both
painted to RAL 9010 (white, standard).
End pieces (4): Sheet steel painted to RAL 9010.
Hydraulic connections (5): Upon customer request, the hy-
draulic connection to the registers can be established either on
the left-hand (-WS1) or right-hand side (-WS2) of the unit. Con-
nections seen in air flow direction.
Function
The primary air (1) supplied from the plenum box induces sec-
ondary air in the room (2), which is cooled or heated via the reg-
ister (4).
The primary air is mixed with the cooled secondary air. The
combined (3) primary and secondary air flows are supplied to
the room at low velocity via supply air slots.
Schematic diagram of the mode of operation
Schematic diagram of the jet path
54
1
2
3
DISA-...-SR DISA-...-SQ DISA-...-RE DISA-...-OB
1
2
3
4

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Installation and commissioning
Operating conditions
Prior to installation or commissioning of the device, the follow-
ing operating conditions must be observed:
Material reception
Upon reception of the materials, the components must be care-
fully 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 sticker:
To prevent possible damage during transport, the devices will
be delivered ex works on pallets (that correspond to the partic-
ular weight and dimensions) wrapped with tapes and transpar-
ent plastic film. It is recommended leaving this protection in
place until the device is commissioned. The openings of the
pipes should be closed with dust caps to avoid dust and entry of
dirt.
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 other-
wise 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.
(1) Standard unit: housing + slot + grille and heat exchanger (empty)
Storage
If the device is not installed immediately after its reception, it
must be stored according to the following instructions:
- Coolant or heating fluid: water or glycols (ethylene or pro-
pylene) at a concentration below 60%.
- Water inlet temperature: above the dew point up to 80°C
(Please note that some connectors do not work at water
temperatures above 65°C)
- Air inlet temperature: from 2 to 45°C
- Max. operating pressure: 8 bar / 95°C
-H: 2-pipe system
-OL: without air deflection blades
-SR: Perforated sheet grille, - perforation Ø 6 mm -
-A: Nozzle configuration - A -
-900: Nominal length 900 mm -
-1200: Total length -1200 mm-
-M: Housing position - centre -
-WS1: Hydraulic connection - left -
-AS1: Number of connection pipes - 1 connection pipe arranged
-123: Diameter of the connection pipes - 123 mm -
-2E: End piece - Model with two end pieces-
To prevent deposits and corrosion,
the quality of the water for filling the registers must
comply with regulations VDI 2035 and DIN 50930.
NL 900 1200 1500 1800 2100 2400 2700 3000
Weights (1)
(kg) 11 14 17 20 23 27 30 33
- 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, pal-
lets, etc.) on the device, unless they have already been re-
moved beforehand.
- Cover the device with tarpaulins, in order to protect it from
dust, moisture and extreme temperatures.
- Entries, openings and pipes must be hermetically sealed
with dust caps.
Should manufacture-related damage be detected
on the device,
please contact your local sales office prior to in-
The unit shall only be held in position or moved
by holding on to the housing. The weight must not
rest on 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.

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Installation
The wall induction diffuser type DISA-W is suitable for vertical
installation in a wall or ceiling panelling. The devices must not
be installed in places with extreme moisture (e.g. laundries or
swimming pools), aggressive media, with high dust formation,
outdoors or in places subject to explosion hazards.
For correct installation, the following instructions must be fol-
lowed:
Mounting
The DISA-W series was developed for vertical installation in a
wall. The device is suspended from a load-bearing ceiling using
fastening material approved by the building supervisory author-
ities, for example M6 threaded bars. Fastening takes place on
the fixing lugs provided ex works.
During mounting the end of the register pipes must be sealed to
protect them from dust and dirt.
Band design
When ordering -BV (band connection), the band connection
parts are delivered as accessories. The connection elements are
fastened to the device on one side using the delivered screws
and can be fastened to the load-bearing ceiling using threaded
bars provided on site or other fastening material approved by
the building supervisory authorities.
- Make sure that places that are intended as openings for air
admission and air discharge are free of pipes, electric ca-
bles, 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 in the ceiling.
- The installation site must have sufficient space and the nec-
essary resources for carrying out mounting and mainte-
nance activities of all device components. Make sure that
the valves are easily accessible.
-The hydraulic pipes should be attached above the device.
-If the hydraulic pipework is lower than the input of the de-
vice, a ventilation opening must be provided on site.
NL (mm) 1 connecting piece 2 connecting pieces
900
a,c a,b
1200
1500
1800
2100
2400
2700
3000
ac
b
ca
NL-155
1/41/4
115
1/41/4
For the installation of the device, use adequate
tools, devices and materials and observe the safety
regulations and other current regulations.
SCHAKO cannot be held liable for damage result-
ing from faulty installation or the use of unsuitable
fastening devices.
A
A
B
B

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Hydraulic connections
Upon customer request, the hydraulic connection to the regis-
ters can be established either on the left-hand (-WS1) or right-
hand side (-WS2) of the unit.
As standard the cooling circuit pipes are attached on the outside
and the heating circuits at the centre of the register.
Hydraulic connections DISA-W-H (2-pipe)
Hydraulic connections DISA-W-HT (4-pipe)
Amount of water of the registers:
The connection of the hydraulic connections can be done by sol-
dering, pressing (in connection with supporting sleeves) or by
means of flexible hoses resistant to oxygen diffusion and push-
fit systems. The use of flexible hoses is subject to the manufac-
turer's specification.
When making the hydraulic con-
nections, you have to use suitable
tools
to avoid excessive tightening or
twisting of the register connec-
tions.
When charging the register, make sure by means of on-site ven-
tilation devices that no air remains in the hydraulic circuit.
If the unit is to be installed at a location having temperatures be-
low zero degrees, glycol must be admixed to the coolant in a
suitable ratio, to ensure that the freezing point of this liquid al-
ways stays below the minimum temperature of the operating
site. Please note that the use of an antifreeze necessarily results
in a loss in performance of the register.
Connecting the air ducts
The air ducts are attached by using pipe clamps, fixing lugs or
the like.
Optionally, a rubber lip seal can
be installed on the connection
pipe, to ensure tightness be-
tween the device and the pipes.
Water capacity (litres)
NL DISA-W-HT DISA-W-H
Heating Cooling
900 0,2 0,6 0,8
1200 0,3 0,8 1
1500 0,3 1 1,3
1800 0,4 1,2 1,6
2100 0,5 1,4 1,8
2400 0,5 1,6 2,1
2700 0,6 1,8 2,4
3000 0,7 2 2,7
Heating Cooling
In order to achieve a uniform cooling capacity, the
wall induction diffusers type DISA-W should be
connected to the cold water distribution system in
parallel.
The wall induction diffusers type DISA-W are induc-
tion devices for "dry cooling".
To avoid condensation, the cold water supply tem-
perature must be selected such that it does not fall
below the dew point, which may make it necessary
to install protective devices (condensate monitors).

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Mounting accessories
Valves and actuators
Valves and actuators shall not be installed ex works. During in-
stallation the manufacturer's specifications must be observed.
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:
Condensate monitor
The installation of a condensate monitor depends on the select-
ed model. Please follow the instructions enclosed with each
model.
Adjustment of the air deflection blades
To regulate the air flow, rotate the air deflection blades manual-
ly.
With blockwise adjustable blades, 5 blades can be adjusted si-
multaneously.
Checks
Prior to commissioning, the following items must be checked or
guaranteed:
During commissioning itself, the following items must be guar-
anteed:
- Do not mount the temperature control close to or above a
heat source (direct sunlight, lamps, television sets, radia-
tors, etc.), in places with draught air or directly opposite
to an air diffuser grille.
- Temperature controls must be mounted at least 1.5 me-
tres above the floor.
-
Mounting temperature controls on walls toward the out-
doors should be avoided.
Prior to drilling, make sure that
at the location in the wall where the temperature
control
is attached no electric cables are present.
Faulty mounting of the sub-assemblies and of the
accessories of the unit can result in a substantial
power loss of the unit.
- Hydraulic connections were tightened properly and exhib-
it no leaks.
- Connecting and fastening elements have been sufficiently
tightened.
- Adequate access for carrying out the maintenance activi-
ties has been provided.
-
Use the on-site ventilation devices to ensure that no air re-
mains in the register and the water circuit.
- The connecting and fastening elements have been suffi-
ciently tightened.
- In heating mode, the temperature of the discharged sup-
ply air is not above 40°C.
The adjusting angle of the air deflection blades
must not be more than ± 45°, in order to guarantee
its function.
At an adjusting angle of the air deflection blades
outside the straight air throw of up to 45°,
the cooling capacity of the heat exchanger
is reduced by up to 5%, and the horizontal throw is
reduced.
After these items have been taken care of, the cor-
rect fastening of the device must be checked.

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Maintenance
For reasons of safety, the power supply and hydraulic circuit
must be disconnected 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
The screws attached to the device allow easy dismounting of the
grille, in order to carry out the maintenance activities.
Air ducts and plenum box
Clean them by blowing compressed air through them or using
non-aggressive cleaners.
Registers
To guarantee the technical characteristics of the device, the reg-
isters and heat exchangers must be kept in good clean condi-
tion. To ensure this, the following maintenance activities must
be carried out:
If condensates are detected, interrupt the hydraulic circuit and
find the possible cause of the problem.
Grilles
Clean them by blowing compressed air through them or using
non-aggressive cleaners.
When performing maintenance activities, it is rec-
ommended wearing personal protective equip-
ment, in order to avoid cuts and other injuries
produced by sharp and pointed parts.
To avoid accidental rotation or folding down of the
grille, please check that the locks are properly
closed.
For reasons of safety, the power supply and hy-
draulic circuit must be disconnected prior to any
maintenance activity.
- If the register is dirty, clean it
by spraying it with water or compressed air or by evacua-
tion.
- Please do not use any scouring agents for cleaning since
these materials may impair or damage the DISA-W (gal-
vanised steel, aluminium and copper) and the surface
coatings (paints and anodised surfaces).
- If there are larger differences in distance between the ribs,
they must be "aligned".
-
Ventilate the hydraulic circuits of the register. In doing so,
watch out for possible leaks of the hydraulic system.
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.
After recharging the register, the installer has to
make sure by means of on-site ventilation devices
that no air remains in the hydraulic circuit.

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Checking the primary volumetric flow
The supplied primary volumetric flow can be simply checked by
checking the static pressure with a Pa meter and the measuring
tube available from us as accessory.
To this end, one end of the measuring tube fitted with a rubber
cap is pressed against the air outlet of one of the nozzles at the
primary air plenum box (see drawing) and the other end is con-
nected to the hose connection of a Pa meter.
The values read on the meter and the following formula can be
used to to determine the volumetric flow:
V [l/s] = Primary air flow
Ps [Pa] = Static pressure
The K value is taken from the following table:
Air density: ρ= 1.2 kg/m3
Nozzle configuration A Nozzle configuration B
NL (mm)
Nozzle config-
uration 900 1200 1500 1800 2100 2400 2700 3000
?A 0,42 0,62 0,79 0,99 1,16 1,32 1,51 1,69
B0,71 1,06 1,35 1,69 1,98 2,27 2,59 2,90
C1,32 1,96 2,50 3,14 3,68 4,21 4,80 5,39
D1,97 2,92 3,72 4,67 5,48 6,28 7,15 8,03
VKPs=
The Pa meter is not included in the delivery.
Vzu (m
3
/h)0 20 40 60 80 100 200 300
0 20 40 60 80 100 200 300
'P (Pa.)
900-A
1200-A
1500-A 1800-A
2100-A 2400-A
2700-A
3000-A
900-B 1200-B 1500-B 1800-B 2100-B 2400-B
2700-B 3000-B
Vzu (m
3
/h)0 20 40 60 80 100 200 300
0 20 40 60 80 100 200 300
'P (Pa.)

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Nozzle configuration C Nozzle configuration D
Troubleshooting
Vzu (m
3
/h)0 20 40 60 80 100 200 300
0 20 40 60 80 100 200 300
'P (Pa.)
900-C
1200-C
1500-C
1800-C
2100-C
2400-C
2700-C
3000-C
Vzu (m
3
/h)0 20 40 60 80 100 200 300
0 20 40 60 80 100 200 300
'P (Pa.)
900-D
1200-D
1500-D
1800-D
2100-D
2400-D
2700-D
3000-D
Problem Possible cause Solution
The unit does not cool or heat suffi-
ciently
Primary air volume not present or too low Check primary air volume
Air inlet and outlet of the inner unit clogged Remove foreign material and clean the unit
Air in the hydraulic system Ventilation of the hydraulic system
Please inform the installer
Installed unfavourable or malfunctions at the temperature
control or sensor Install thermostat in a different place
Clogging of the cooling/heating register Clean the register in accradance with the
maintenance instructions
The unit is losing water
Condensates in the register Modify the water inlet temperature
The water circuit of the register is leaking
Please inform the installerRegister damaged
Incorrect valve or hydraulic connection
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
Loose screws and fastening elements Tighten screws
Foreign material or dirt on register surface Remove foreign material by careful
brushing
Primary air volume too large for selected configuration. Check primary air volume

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