Stulz Tel-Air-2 Series User manual

STULZ the natural choice
Operating instructions
Tel-Air-2
Air conditioner
230/1/50 - 400/3+N/50
Index 35A
Edition 06.18
EN
English

E/0618/35A/3
Table of Contents
1. Safety directions.................................................................................................................6
1.1 Attachments..............................................................................................................6
1.2 General information...................................................................................................7
1.3 Handling refrigerants.................................................................................................8
1.4 Safety and environmental requirements....................................................................8
2. Unit identification..............................................................................................................10
2.1 Intended and non-intended use...............................................................................13
3. Components and operating principle..............................................................................14
3.1 Layout of components.............................................................................................14
3.2 Operating method....................................................................................................19
3.3 Mechanical parts.....................................................................................................20
3.4 Cooling components................................................................................................20
3.5 Motors.....................................................................................................................22
3.6 Control, Monitoring and Safety Components...........................................................23
4. Technical data and drawings...........................................................................................26
4.1 Application limits......................................................................................................26
4.2 Technical data.........................................................................................................26
5. Unpacking and Inspection................................................................................................44
6. Precautions and safety considerations..........................................................................44
6.1 Precautions when handling the unit.........................................................................45
6.2 Precautions when installing and servicing the unit...................................................45
7. Installation.........................................................................................................................45
7.1 Positioning the unit..................................................................................................46
7.2 Hydraulic connections .............................................................................................47
7.3 Electrical Connections.............................................................................................47
8. Start-up..............................................................................................................................52
9. Maintenance......................................................................................................................53
9.1 Preventive maintenance schedule...........................................................................53

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10. Residual Hazards and Emergency Information..............................................................55
10.1 General safety provisions........................................................................................55
10.2 Hazards arising from the product coming into contact with things or persons..........55
10.3 Hazards arising from electrical faults.......................................................................55
10.4 Safety standards to comply with when working on refrigeration circuits...................57
10.5 Hazards arising in case of fire.................................................................................58
10.6 Toxic substances ....................................................................................................58
10.7 Hazardous fluids .....................................................................................................58
11. Uninstalling and disposal of the unit ..............................................................................58
12. Options..............................................................................................................................60
12.1 Protective treatment on coils –TREATT .................................................................60
12.2 Electrical reheat –RSC...........................................................................................60
12.3 Monitoring of phase sequence and phase loss (for 3-phase scroll compressors) –
PSCR......................................................................................................................60
12.4 Refrigerant R134a...................................................................................................60
12.5 Kit for low external temperatures –WINTER KIT.....................................................65
12.6 Main switch - SWT/SWM.........................................................................................65
12.7 Socket connection field –SCF ................................................................................65
12.8 Crankcase heater for compressor –CRA................................................................65
12.9 Soft start for three-phase compressor –SOFTT......................................................66
12.10 Soft start for single-phase compressor –SOFTM....................................................69
12.11 Voltage control device –VCC..................................................................................70
12.12 WIB1000 / WIB1485................................................................................................71
12.13 Seaworthy case packaging - SEAPACK..................................................................71

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Important
Read these operating instructions carefully and observe them before installing and using
this A/C unit.
Keep this manual throughout the lifetime of the product.
This manual reflects the state of the art existing at the time the product is marketed and
shall not be deemed to be inadequate for the sole reason that it has not been updated
following new developments in design and construction methods.
STULZ reserves the right to update the product and relevant manual without being
required to update previous products and manuals other than in exceptional
circumstances. To require or receive any updates of the instructions manual or
amendments thereto, which shall be deemed to be an integral part of the manual, please
contact your local STULZ partner.
Observe the instructions contained in the section entitled
Safety instructions.
For three-phase scroll compressors: take care of correct phase sequence after the
connection of the main power supply.
The sequence is important for the correct sense of rotation of the 3-phase Scroll compressor.
A loud noise coming from the compressor means it is turning in the wrong direction. If this
continues for a few hours, it will overheat and irreparably damage the compressor. Correct
compressor operation can be easily checked by measuring the temperature at the condenser
outlet. If this temperature is noticeably higher than the external temperature, the compressors is
working correctly. Otherwise, the compressor is turning in the wrong direction and the phase
sequence must be changed.

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1. Safety directions
This manual contains the basic instructions which must be respected during installation, use and
maintenance of the unit. Therefore, installer and specialized personnel / user must read and
respect these indications before mounting and commissioning the unit.
Read carefully the whole information on this manual, with particular attention to the
norms marked with the symbol on the left. Failure of conformity to these norms
might cause damages to things, people, ambient and the unit itself.
The manufacturer is not responsible for any misuse of air conditioner, as well as for non-
authorized modifications and for the inobservance of instructions on this manual.
This manual must be kept by the customer and made available to the installation,
commissioning, use and maintenance personnel.
SYMBOLS ON THIS MANUAL
LABELS ON THE UNIT
DANGER
RISK OF INJURY FOR
OPERATOR AND
POSSIBILITY OF
DAMAGING THE UNIT
DANGER:
MOVING
COMPONENTS
ATTENTION
INFORMATION OR
WARNING OF CAUTION
IN CARRYING OUT A
PROCEDURE
DANGER:
HOT
COMPONENTS
INFORMATION
IMPORTANT
INFORMATION
DANGER:
HIGH VOLTAGE
1.1 Attachments
The following documents are attached to this manual, as its integral part:
Use and maintenance manual part 2, which contains the electrical drawing and the
conformity declaration CE of the unit.
User manual of the electronic controller.

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1.2 General information
This air conditioning unit has been designed and built for a professional use according to
applicable regulations. Please check the complete list of applicable regulations to the attached
CE conformity declaration. It has been manufactured with high quality components, tested to
certify its reliability and safety (see attached test report), and provided with warranty.
These operating instructions include the basic directions that must be complied with during
system installation, operation and maintenance. Consequently both the installer and assigned
specialized personnel/operators must read and comply with these directions before proceeding
with installation and start-up. The instruction manual must always be available at the site where
the system is used.
Works have to be carried out by competent staff only.
Observance of regulations for accident prevention.
Stay out of danger when lifting and setting off the unit.
Secure the unit to avoid the risk of overturning.
Do not climb on or enter the air conditioner.
Do not remove protection panels. Safety devices may not be bypassed.
Respect the corresponding EN and IEC standards for the electric connection
of the unit and observe the conditions of power supply companies.
Switch off the voltage from the unit when working on it.
Observe the national regulations of the country where the unit will be
installed.
The refrigerant circuit contains refrigerant and refrigerating plant oil: observe
professional disposal for maintenance and when setting the unit out of
service.
For transport, installation, either ordinary or extraordinary maintenance,
operators and maintenance people must wear individual protection devices
(i.e. gloves, glasses, helmet, shoes), according to the indications of safety
manager and applicable regulations.
The unit may only be used to cool according to the Stulz specification.
Before any maintenance operation, read and follow instructions in the
corresponding chapter.
The manufacturer is not liable for damages caused by either a misuse or
unauthorized modifications of the air conditioner.
Any special opening tools have to be placed in a visible location nearby the
unit.

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1.3 Handling refrigerants
According to EN 378, refrigerants are divided in groups, concerning health and safety.
Refrigerants used in Telecom Line units belongs to group L1 (non-flammable, non-toxic).
Adherence to the regulations by law and guide-lines.
Execution only by competent staff.
Responsibility for correct disposal of refrigerant and system parts is incumbent on the
operator (see chapter 'Uninstalling and disposal of the unit').
Refrigerants have a narcotic effect when inhaled in high concentrations.
The room is to be evacuated immediately if high concentrations of refrigerant suddenly
occur. The room may only be entered again after adequate ventilation.
If unavoidable work is required in presence of a high concentration of refrigerant, breathing
apparatus must be worn. This does not mean simple filter masks. Comply with breathing
protection data sheet.
Safety glasses and safety gloves are to be worn.
Do not eat, drink or smoke at work.
Liquid refrigerant must not get onto the skin.
Only use in well ventilated areas.
Do not inhale refrigerant vapours.
Warn against intentional misuse.
Remove refrigerant from the system before performing any welding or brazing works.
Weld and braze air conditioning systems without refrigerants only in suitably ventilated
rooms.
If the system emits a pungent smell this means that the refrigerant has decomposed due to
overheating. Immediately leave the room and return only after it has been suitably ventilated
or when wearing a gas mask for acid gases.
It is absolutely essential to comply with the first aid measures if accidents occur.
Refrigerants containing FCs contribute to the global warming and with this to climate
changes. The FCs must therefore be disposed of in accordance with the regulations, i.e. only
by companies specially qualified and licensed as recognised disposal companies for
refrigerants (see chapter 'Uninstalling and disposal of the unit').
1.4 Safety and environmental requirements
The following requirements relate to the operation of refrigerating plants within the European
Community.
The used components must correspond to the pressure equipment guide-line 2014/68/EU
and EN 378 part 1-4.
Independent of the design, the equipment and inspection before the delivery, also the
operator of such plants has duties according to EN 378 and national regulations.

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This concerns the installation, the operation and the repeated inspection:
Installation:
according to EN 378
Operation:
Determination of emergency measures (accidents, malfunctions)
Creation of an abbreviated instruction and notification (template page)
a. A unit protocol must be kept
b. To be stored in the proximity of the unit
c. Access for competent staff in case of repairs and repeated
inspection must be ensured.
Repeated inspection:
according to EN 378. The operator is responsible for the execution.
The operator must ensure that all maintenance, inspection and assembly work is carried out by
authorised and qualified specialist staff who have made an in-depth study of the operating
instructions.
It is absolutely essential to comply with the procedure for shutting down the system described in
the operating instructions. Before maintenance work, the unit must be switched off at the main
switch and a warning sign displayed to prevent unintentional switching-on.
Efficiency of safety devices must be kept during the whole life cycle of the unit. In order to
perform this task, please follow the prescription given in Chapter 9.
First aid measures
If health problems occur during or after handling fluorinated hydrocarbons, a doctor is to be
consulted immediately. The doctor is to be informed that the work involved the use of
fluorinated hydrocarbons.
In the case of acute effects, the casualty is to be brought into the fresh air as quickly as
possible.
The casualty must never be left unsupervised.
If the casualty is not breathing, initiate mouth-to-mouth resuscitation immediately.
If the casualty is unconscious or very dazed he or she must not be given any liquid.
Splashes of fluorinated hydrocarbons in the eyes can be removed by an assistant by blowing
air or using a fan. Then rinse with water.
Independent conversion and manufacture of replacement parts.
The system may only be converted or modified after consultation with STULZ. Original
replacement parts and replacement parts/accessories authorized by STULZ are an aid to
safety.
Independent conversion and manufacture of replacement parts
The system may only be converted or modified after consultation with STULZ. Original
replacement parts and replacement parts/accessories authorized by STULZ are an aid to safety.
Unacceptable operating methods
The operating safety of the system is only guaranteed when it is used as intended. The limit
values stipulated in the technical data must not be exceeded under any circumstances.

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2. Unit identification
Technical name-plate
This unit can be correctly identified by
the technical name-plate containing all
the information for its correct use.
The name-plate is attached both to the
external casing of the unit (generally on
one of the sides) and to the door of the
electrical panel.
In addition to the manufacturer's
identification data and the product trade-
marks, the name-plate contains the
following information:
Example of name-plate. Data are purely
an example.
The technical name-plate is embossed
on a plastic support which ensures high
endurance of the text even in particularly
difficult environments.
For any assistance or
information concerning the unit
described in this manual,
knowledge of its serial number
is essential.
*Nominal conditions:
30°C (RH 30%) inside shelter temperature and 35°C ambient temperature