Stavoklima Li-Combi User manual

C O M F O R T A I R C U R T A I N S T A V O K L I M A
Installation and operation manual
Li-Combi model
www.stavoklima.cz version 0
EN

Installation and operation manual
2 Technical changes reserved
1. Table of Contents
1. Table of Contents ............................................................................................................................ 2
2. Unpacking, check after transport or warehousing.......................................................................... 3
2.1. Unpacking and check............................................................................................................... 3
2.2. Storing of the unit, additional transport recommendations................................................... 3
2.3. Safety measures ...................................................................................................................... 4
3. Basic information about the unit and its use.................................................................................. 5
4. Dimensions of the unit .................................................................................................................... 6
5. Mounting of the unit –additionally arrested ZSA suspension sleeves ........................................... 7
6. Connection of the unit to heating system....................................................................................... 8
6.1. Heat exchanger control with a valve with electrothermic head............................................. 9
6.2. Setting of independent valve flow pressure (ETVQ) ............................................................... 9
7. Ditronic Touch wall-mounted controller....................................................................................... 10
8. Electric connection of the unit ...................................................................................................... 10
8.1. Unlocking of emergency thermostat..................................................................................... 11
8.2. Configuration of exhaust thermostat.................................................................................... 12
9. Commissioning, starting of the unit.............................................................................................. 12
10. Optional accessories - depending on equipment level ................................................................. 12
11. Basic service and maintenance information ................................................................................. 13
11.1. Troubleshooting .................................................................................................................... 14
12. Decommissioning –disposal ......................................................................................................... 15
13. Important notes ............................................................................................................................ 15
Explanation of symbols used
Instructions for mechanical repairs and
maintenance.
Important safety information, technical
information, data and device output.
Important electric information - read carefully -
unit damage hazard in case of wrong
installation.
Important information - please read carefully.

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2. Unpacking, check after transport or warehousing
2.1. Unpacking and check
Carefully check the delivery note attached to the delivery. For components identified as extra accessories in the delivery note (not
included in the unit or installed therein), please check completeness to the parcel and perfect condition (usually delivered in a
separate box). Report any serious damage to packaging or boxes, and make a basic record to the parcel transport documents.
Inform the transport company or manufacturer (if the manufacturer arranges transport) immediately.
All packaging material used is environmentally friendly and may be reused or recycled. Dispose of or reprocess the non-
environmentally friendly components correctly.
When unpacking, follow the procedure diagrammatically shown below:
2.2. Storing of the unit, additional transport recommendations
Observe packaging decals on the unit. The device in its packaging must not be turned
or placed in transport positions other than those supplied and recommended by the
manufacturer. Packaging also contains production number and unit type for easy unit
type identification.
Use genuine packaging for further transport of the unit. The packaging is tested for
re-use, and a different packaging may cause damage to the unit.
Use means with certified sufficient loading capacity for transport and handling;
properly qualified persons only may operate the transport means.
Permissible warehousing conditions: -10°C ÷ 50°C, 50-85% humidity without
condensation.
Do not remove genuine packaging until installation is complete (to avoid device
damage). At least 2 persons are recommended for safe handling.
Remove the protective frame by unscrewing the screws
from the pallet side (refer to figure).

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2.3. Safety measures
The unit has been manufactured in line with the government decrees and Czech standards harmonized with the EU regulations
mentioned in the manufacturer’s declaration of conformity.
The above mentioned product complies with the following standards:
ČSN EN 60335-1 ed.3 ČSN EN 60335-2-30 ed. 3
ČSN EN IEC 61000-6-2 ed. 4 ČSN EN 61000-6-3 ed. 2
The above mentioned product complies with the following directives:
Directive 2009/125/EC of the European Parliament and of the Council establishing a framework for the setting of eco-design
requirements for energy-related products.
Government Decree No. 118/2016 Coll. Directive 2014/35/EU of the European Parliament and of the Council on the
harmonisation of the laws of the Member States relating to the making available on the market of electrical equipment
designed for use within certain voltage limits.
Government Decree No. 117/2016 Coll. Directive 2014/30/EU of the European Parliament and of the Council on the
harmonisation of the laws of the Member States relating to electromagnetic compatibility.
Government Decree No. 481/2012 Coll. (Regulation of the European Parliament and of the Council No. 2014/35/EU,
Regulation of the European Parliament and of the Council No. 2011/65/EU).
Government Decree on restriction the use of some hazardous materials found in electrical and electronic products.
Observe generally applicable national provisions and other related regulations. Unplug the unit from mains before any service
intervention. Connection and earthing of the electric device or components thereof must be in line with laws applicable in the
country of use. Only qualified staff may carry out any electric service works.
Observe applicable laws, in particular:
on safety of electric and thermal appliances,
on central heat distribution systems,
on fire safety,
do never exceed working pressure and temperature specified in the production label.
Follow standards and rules applicable in the country of use, in particular the fire safety of appliances and heat sources, and the
fire technical properties of materials - flammability levels. Place the unit 150mm from B, C1, C2 level flammable materials, and
400mm and 1000mm for C3 level easily flammable materials in the radiation direction (air flow from the unit).

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3. Basic information about the unit and its use
An air unit is a device, which produces a natural air barrier against penetration of cold air into heat environment (in summer, it
operates as a protection againstpenetration of hot summer air to the spaces being either cooled or air conditioned). These devices
are suitable for industrial environments. The permitted temperature range in the space is 5–40 °C.
The unit with combined heating is recommended for installations where it may occur that medium temperature is too low when
compared with the required heating power. The Li-Combi door air unit actuates automatically the secondary electric source of
heating when theheating water temperature drops below optimum level. This provides constant output temperature and keeping
of comfort interior conditions by the manner being most energetically effective.
The air unit is fitted with EC radial reversible suction fans, which are both statically and dynamically balanced, and the motors
have built-in thermal protection –thermal contact. The effective distribution of exhausted air is provided owing to double-row
controllable splines that can be configured separately for each air flow. The Cu-Al hot water heat exchanger for 1.6MPa/90°C with
a power reserve is provided with electric continuous bars that heats up air flow automatically to the required output temperature.
Technical conditions for unit operation:
max. media working temperature 90°C/pressure 1.6MPa – unless specified otherwise,
hot water working voltage –230V/50Hz, electric heater unit working voltage - 400V/50Hz
max. surrounding temperature 40 °C,
IP 20 rating of the unit,
the unit is intended for basic and non-aggressive environment,
minimum pressure difference 23kPa must be provided for use of a 2W valve (applies only to a
pressure-independent valve).
the secondary suction grid
operates also as inspection door
Cu-Al hot water heat exchanger for
1.6MPa/90°C
electric continuous bars for constant
output temperature and keeping of
comfort conditions
powerful reversible
EC technology suction fans,
statically and
dynamically balanced
stylish suction grid made from
expanded metal of fine structure
operates as a
filter and also as an inspection
door
double-row controllable
splines for effective air
distribution
Advanced combined method of heating

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4. Dimensions of the unit

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5. Mounting of the unit –additionally arrested ZSA suspension
sleeves
The door unit is suspended in four (or five for the unit of the length of 2,500mm)
suspension points on the unit casing. The suspension points are accessible from outside
and rivet nuts (M10 threads) are installed on the unit from production plant.
Upon special purchase order, the following is supplied as accessories to the ZSA under-
ceiling suspensions:
4 pcs of M10x1000 threaded bar, 4 pcs of M10/40 anchors, 4 pcs M10 left-right suspension
sleeve, 4 pcs of M10 left-right bolt, 8 pcs M10 nuts (for assembly refer to figure on the
right)
Measure the position of the unit and its distance from the ceiling, and cut the threaded
bars to required length. Mark the anchoring points according to drilling scheme (refer to
figure) and drill the ceiling holes for installation of anchors. First, attach left-right bolt into
the unit, fasten with nuts, and rotate left-right suspension sleeves on the bolt. Fit the
threaded rods into the prepared ceiling anchors and rotate the nuts. Set the unit into the
required position and tighten up the suspension sleeve to the threaded bars until the
required connection is made, then secure the sleeve with nuts.
Pay attention to correct fitting of all nuts to all assembly components. Pay attention to the
end position of the threads to avoid loosening and falling the unit by rotation. For this
system it is not possible to use a connection lock to join two or more air curtains. Use the
sleeve to lock the final position of the unit.
Use quality anchors and wall plugs only. Consider installation situation and suitability of
anchoring and installation material, including loading capacity of the structure properly.
The manufacturer accepts no liability for improperly used wall plugs or other installation
and hanging material.
Following the assembly, check for horizontal position in both directions. Make sure that tightening up of individual hangers and
sleeves do not cause crossing and twisting of the unit. Always properly consider loading capacity of the ceiling or of the wall. Install
the device to structurally solid beams.
M10 anchor
M10 nut
M10 nut
left-right M10
suspension sleeve
left-right M10 bolt
M8 threaded rod

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6. Connection of the unit to heating system
Please check all hot water connections for readiness and perfect condition before
connecting media to the unit. Furthermore, please check the hot distribution for
components or other measures to ensure zero transmission of static, dynamic, and
dilatation forces at the input and output neck connections. No excessive force may be
applied when connecting the hot water circuit of the building to the unit’s heat exchanger.
By the neck of the air conditioner there is a mark that notes use of two keys so that no
stressing of the necks occurs in the course of tightening or loosening. When bolting and
tightening up the screw union of the heat exchanger must be secured by a clamp against
undesired rotation that may subsequently result in deformations or damage to pipe necks
on the heat exchanger.
Considering the above the manufacturer clearly recommends that flexible connection hoses are used for connection of the heat
exchanger necks (available as PPH accessories, length 300mm, DN25, 32), or a bellows compensator.
Any non-compliance with the instructions above results in rejection of any complaint.
By default, neck for the hot water heater is located on the right hand side on the upper part of the unit (may be placed elsewhere
upon request). The inputs are identified by round marks –medium input red with arrow pointing inside, and medium output blue
with arrow pointing outside.
Do not swap the return and supply neck positions - this may cardinally change performance and parameters of the heater with
consequent impact on the hydraulic system. Do not exceed max temperature and pressure for which the unit is rated.
If required, the valve may be embedded in the unit. Some types of the valves may not be placed in the unit for room reasons
(located outside the equipment). The value of thermostatic head is pre-set, and the function of the electrothermic valve drive is
given by a control type. The connection is then made directly on the neck for media input (third neck is blind). For configuration
of the electrothermic drive functions, refer to clause 6.1.
Pay attention to quality of media fed to the unit; check for installation of cleaning valve downstream the unit (not included in the
supply). Observe max temperature and media pressure to avoid heat exchanger damage. To make sure the heat exchanger
operates correctly, drain the exchanger (sludge valve) and purge the cleaning valve because construction or assembly impurities
may be present in the system. Deaerate the heat exchanger for perfect operation of the heat exchanger. Install the closing valves
on both pipes downstream the unit (ball valves) . Connection thread right above the unit must be removable and not fixed.
As required by the customer, an embedded 2-way valve with control head can be delivered for the hot water heat exchanger. The
valve drive may be electrothermic.
Instructions for electric connection of the valve is included in the wiring scheme for connection of the unit. Specific wiring scheme
or valve instructions are available upon request only.
Media input
Media output
Connection of 2-way ETVQ
valve

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6.1. Heat exchanger control with a valve with electrothermic head
The electrothermic valve drive canbe supplied to the hot water heat exchanger as embedded as 2-way (ETVQ).
“Normally open” version (NO)
When the thermal drive is under voltage, the electrically heated sensor heats up Upon “dead time” expiration
for continuous opening of thermic drive due to cooling down of the sensor.
Note:
The time delay (dead time) needs to be considered during the functional test; the opening and closing time depends on
surrounding temperature. Electric data: 230V/50Hz-3V, IP 54.
6.2. Setting of independent valve flow pressure (ETVQ)
qmax values
Setup
1
2
3
4
5
6
7
8
9
10
DN 25
370
610
830
1050
1270
1490
1720
1870
2050
2150
DN 32
800
1220
1620
2060
2450
2790
3080
3350
3550
3700
qmax = l/h for each setting with the control cone fully open
Turn the setting wheel to required value, e.g., 5.0.
Turn the setting wheel counterclockwise to
position X.
Setup
Closing

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7. Ditronic Touch wall-mounted controller
The Ditronic Touch controller is highly comfortable controller for fan and heater control (hot water heater and electric one) with
optional connection of external elements (door contact, BMS, etc.). Controller function is defined by type of the electric
documentation. The controller is designed for wall-mounted installation and a separate instructions manual is available. Included
to the controller is the Ni-1000 room sensor to be connected to the control board according to the electric wiring documentation.
The connection between the air curtain and the controller is made using a UTP cable with RJ 45 connector (available as optional
accessories in various lengths).
8. Electric connection of the unit
The unit must be protected by a suitable circuit breaker
according to its electric parameters –refer to attached
electric wiring. Connect the ready-to-install cables to the
terminals following the attached electric wiring schemes,
make connection check, equipotential bonding, and finally
turn the power supply on. Use the cable wires with cross
section suitably rated according to the current load –refer
to electric wiring documentation.
The electric grommets for cable are located always on the
opposite side of the standard units than connection of hot
water medium. When connecting the electric installation,
it is necessary to open the upper review board and
unscrew the box lid with a Phillips screwdriver. To connect
the connection cables to the Ditronic control unit, the front
grid must be removed and box lid have to be removed by
a Phillips screwdriver.
Make sure the cable is neither twisted nor deformed in any way. Keep free ends of the cable wires sufficiently long for easy
handling and cut the wire only after you are sure the wire is long enough.
Observe generally applicable national provisions, particularly ČSN 12 2002 and other related regulations. Unplug the unit from
mains before any service intervention. Provisions of ČSN 332190, 332000-5-51 ed. 3, and 33 2000-5-54 ed. 3 must be observed
for connecting and earthing of the electric devices. Qualified electrician only may perform any electric service works (qualification
according to Section 6 of Decree of ČBU No. 50/78 Coll.).
Position of bushing for
power cables
Position of bushings
for connection of
cables
to the control unit

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During assembly, carefully check everything and carry out
the initial review of the device. Check operation of the
FU1-FU3 electric fuses (Ditronic) for interior circuits (for
fuse values, refer to the box of electronics), and make sure
that the external components (accessories), which may
have an essential impact on correct function of the device,
operate.
ATTENTION: The delivery note serves as a warranty
sheet!
8.1. Unlocking of emergency thermostat
The units fitted with the electric heater are provided with
operation thermostat with automatic reset feature (located on
each heater) and emergency thermostat with manual reset.
When permitted limit temperature inside the unit is exceeded,
heating circuit is turned off by the emergency thermostat =
pushbutton sprung up. The button is used to unlock the safety
thermostat in case of the device failure. After cooling down the
thermostat button needs to be pressed back to default position.
(refer to figure).
ATTENTION –unblocking of the emergency thermostat does
not resolve failure of the unit! Always remedy the cause of the
thermostat overheating!
Covering of the air curtain with any strange objects is prohibited ►risk of fire!!!

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8.2. Configuration of exhaust thermostat
The air curtains are fitted with the operation
thermostat with a sensor located in the unit’s
exhaust portion. The thermostat controls
switching of the electric heater.
The electric heater is active until pre-configured
temperature is set. The factory setting of
temperature is 25°C with 1hysteresis. When
change to temperature is required, it is possible
to reconfigure temperature by rotary
potentiometer (refer to figure).
9. Commissioning, starting of the unit
Before commissioning make and check:
covers and shell of the unit are in perfect condition,
•mechanic fixing and anchoring of the unit,
•function of circulating pump (not included in the device),
•correct connection of media and tight connections,
•tightness and function of the valves,
•availability of power voltage,
•correct connection of all unit cables,
•fitting and setting of a pre-circuit breaker (not included in the device),
•free from mechanical impurities or objects.
Initial review of the electric appliance according to ČSN 331500 and ČSN 33 2000-6-61 ed. 2 must be made upon commissioning.
10. Optional accessories - depending on equipment level
The most frequent accessories include electrothermic valves for the temperature control (chapter 6.1). The valves are usually
embedded by the manufacturer, for all available valve types refer to the catalogue.
Another accessory used is the door contact (either magnetic or mechanic). The contacts are placed on the door wings or door
parts in order to signal the position of the door.
An optional accessories may be e.g., room thermostat, hanging of the unit, 0–10V signal control of the unit over the superior BMS,
and more. Selection of an appropriate type of accessories must be supported by the controller type.
For all accessories offered for the Li-Combi unit, refer to the catalogue documentation.

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11. Basic service and maintenance information
All units are thoroughly checked and tested by the manufacturer before dispatch. The most frequent errors root from
misunderstanding of the unit function or incorrect cabling and connection. For this, observe instructions from the manufacturer
to avoid complex troubleshooting. In no case try to operate the unit when connected in a different way - the unit may operate for
a while as you wish or expect but this irreversible step may result in damage beyond repair and loss. No warranty claims can be
accepted with respect to this damage.
The Li-Combi air units are made of quality materials that require no special maintenance. However, we recommend that
maintenance in required or shorter (depending on your observations due to operation in a specific application) intervals is carried
out for long lifecycle of the unit.
!!! Before any work with the unit, disconnect the electric power supply, mains supply for the unit. Electric shock hazard !!!
Observe generally applicable national provisions, particularly ČSN 12 2002 and other related regulations. Unplug the unit from
mains before any service intervention. Provisions of ČSN 332190, 332000-5-51 ed. 3, and 33 2000-5-54 ed. 3 must be observed
for connecting and earthing of the electric devices. Qualified electrician only may perform any electric service works (qualification
according to Decree of ČBU No. 50/78 Coll., § 6 is required).
Please contact your vendor or distributor for a service agreement. You will get regular service and excellent care of your unit.
Quarterly checks:
Unit hanging and tightening of all bolt connections. Check tightening of bolts of exhaust splines - accessible from
internal side wall of the unit, tighten the central splines by turning the splines (by tightening of the internal thread pin),
Heat exchanger space check and remove dirt or foreign objects (use vacuum cleaner for dedusting, or steam for stuck
dirt). When using steam for removal of dirt, always proceed downstream the air flow. Set as lowest temperature as
possible and as lowest steam pressure as possible for not to damage the heat exchanger,
Check cleanliness of the motor body and inner or outer parts of the unit. Do not wash the motor body with water!
Wipe with lukewarm towel only –motor winding damage hazard; after the motor is cleaned, do not turn the unit on
for at least 60 minutes - let the unit dry. Proceed carefully when wiping of the exhaust splines - fragile splines - danger
of damage!
before winter, check in particular the anti-frost protection function, superior circulating pump (not included in the
supply of the device), setting of electrothermic valve,*
re-test tightness of the unit or of installed fittings on the water side. If a sludge filter is installed before the unit –clean
the filter and check deaeration of the heat exchanger,
check unit safety with respect to electric shock hazard according to applicable ČSN or national standards, including
earthing inspection,
cleaning of the upper suction grid (use vacuum cleaner to remove dust or clean with a damp wipe). Clogged suction
grid may result in insufficient air flow through the heating bars located right under the grid, and consequently to
reduced air output or overheating of the device,
cleaning of the suction grid made from the expanded metal of fine structure (use vacuum cleaner to remove dust or
clean with a damp wipe). Clogged suction grid may result in insufficient air flow through the heat exchanger located
behind under the grid, and consequently to reduced air output of the device.

Installation and operation manual
14 Technical changes reserved
11.1. Troubleshooting
Problem
Possible cause
Remedy
The unit can not be turned on
Unit circuit-breaker is off
Turn on
Mains failure
Inspection
Fuse in the unit
Inspection
Door contact
Check connection or interconnection
Anti-frost protection
Inspection
Controller position “0”
Check, > position than “0”
External contact
Check connection or interconnection
Noisy motor
Defective motor mount
Check - replacement
Motor overheats (motor thermal
contact turns off)
Defective motor mount or winding
Replace fan unit
Heavily soiled motor –insufficient cooling
Check, clean
Excessive temperature of intake air
Inspection
Excessive temperature of intake medium
Check setup, remove
The fan delivers little air only
Soiled heat exchanger
Check - replacement
Unit is not heating
Broken or clogged medium supply
Check - replacement
Little air flows through the heat exchanger
Check - remove
Soiled heat exchanger splines
Remove
Insufficient media temperature
Remove
Medium does not circulate
Check, deaerate
Temperature achieved in line with
controller setup
Controller setup
Defective drive of electrothermic valve
Check setup, or replace if defective
Emergency thermostat off
Unlock by pressing button (refer to
clause 8.1)
Automatic operation disconnection
Overheated motor
Find out and clear the cause
Door contact
Check correct function (refer to
controller description)
External clock
Check correct function (refer to
controller description)

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12. Decommissioning –disposal
After the expiration of the service life, the unit must be disassembled and disposed of. Only qualified company may disassemble
the device. The product or components thereof must be disposed in environmentally-friendly manner at the end of its service life.
The components of the unit must be separated and sorted out by type of material for disposal. Dispose of the metal and plastic
components at your local collection yard. The transport packaging of the product is made of common recyclable material (paper,
polyethylene, wood) and is labelled as such according to ČSN 77 0052-2.
As far as disposal is concerned, it is operator’s responsibility to comply with applicable national provisions in the country of use.
In addition, follow regulations and laws of your country applicable to waste disposal. Separated collection and recycling of the
products may help to protect environment and human health.
13. Important notes
The door units are intended to avoid heat or cold loss, filtration, and heating, or for ventilation in combination with mixing
accessories. Other uses are not intended. The manufacturer accepts no liability for damage resulting from use other than
intended. Observe this manual in operation of the units.
Installation, electric connection, and repairs must be carried out by qualified persons according to § 6 of Decree No. 50/78 Coll.
or according to applicable national standards and regulations. An expert company is needed to connect the heating medium.
Before the start of the heating season, it is necessary to provide the required amount of heating medium with the design values
for units with the hot water heater.
The manufacturer reserves right to changes for marketing or production reasons without prior notice!

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STAVOKLIMA s.r.o.
Budějovická 450, 370 01 Homole
Phone: [phone]
e-mail: [email protected]
www.stavoklima.cz