Stulz WDE Series User manual

Index 36B
Issue 08.2018
Wall-Air Displacement Evolution
Operating instructions
Air Conditioners
230/1/50 - 400/3+N/50

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2EN/36B/08.2018 © STULZ SpA – all rights reserved
STULZ SpA
Via Evangelista Torricelli n.3
37067 Valeggio sul Mincio VR
ABOUT STULZ
Since it was founded in 1947, the STULZ company has
evolved into one of the world’s leading system suppliers
of air-conditioning technology. Since 1974 the group has
seen continual international expansion of its air condition-
ing technology business, specialising in A/C for data cen-
tres and telecommunications installations. STULZ has sev-
en production plants (Germany, Italy, the USA, 2 in China,
Brazil and Indiaand) and seventeen subsidiaries (in France,
Italy, Great Britain, Belgium, Brazil, the Netherlands, New
Zealand, Mexico, Austria, Poland, Spain, Singapore, China,
India, South Africa, Australia and the USA). The company
also co-operates with sales and service partners in over
130 other countries, and therefore boasts an international
network of air-conditioning specialists.

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3© STULZ SpA . – all rights reserved EN/36B/08.2018
Wall-Air Displacement Evolution
Dear customer,
thank you for having chosen Wall-Air Displacement Evolution from STULZ.
It's the result of decades of research and design studies, with a fine search of materials and
technologies to obtain an high quality unit.
The CE mark guarantees that the STULZ products satisfy the requirements of the European
Machinery Directive for safety.
The level of quality is constantly checked at every stage, from design to production, making the
STULZ products synonymous of SAFETY, QUALITY and RELIABILITY.
For general inquiries concerning products by STULZ SpA, please contact our Aftersales at:
telephone [phone]
fax [phone]
e-mail [email protected]
For further information concerning our products and services visit our website :
www.stulz.it

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5© STULZ SpA . – all rights reserved EN/36B/08.2018
Table of contents
1.Safety directions ...................................................................................................7
1.1.Symbols used in this manual .................................................................................................................... 7
1.2.Labels on the unit ......................................................................................................................................... 7
1.3.General information..................................................................................................................................... 7
1.4.Handling refrigerants.................................................................................................................................. 8
1.5.Safety and environmental requirements.............................................................................................. 9
2.Unit identification................................................................................................10
2.1.Intended and non-intended use............................................................................................................13
3.Technical data and drawings ...............................................................................14
3.1.Application limits.........................................................................................................................................14
3.2.Technical data .............................................................................................................................................14
3.3.Drawings........................................................................................................................................................17
4.Components and operating principle ..................................................................24
4.1.Component layout......................................................................................................................................24
4.2.Operating method......................................................................................................................................24
4.3.Mechanical components..........................................................................................................................25
4.4.Cooling components .................................................................................................................................28
4.5.Motors ............................................................................................................................................................30
4.6.Control, monitoring and safety components.....................................................................................31
5.Unpacking and inspection ...................................................................................33
6.Installation...........................................................................................................36
6.1.Positioning the unit ....................................................................................................................................36
6.2.Mechanical installation .............................................................................................................................37
6.3.Electric connections..................................................................................................................................38
7.Start-up ...............................................................................................................40
8.Maintenance ........................................................................................................41
8.1.Safety instructions .....................................................................................................................................41
8.2.Preventive maintenance schedule .......................................................................................................42
8.3.Air circuit........................................................................................................................................................42
8.4.Refrigerant circuit ......................................................................................................................................43
8.5.General appliance cleaning procedures.............................................................................................44
9.Troubleshooting ..................................................................................................45
10.Uninstalling and disposal of the unit .................................................................46
11.Options..............................................................................................................48
11.1.Protective treatment on condenser and evaporator – TREATW...........................................48
11.2.Stainless steel casing – PAKIN..........................................................................................................48
11.3.Seaworthy case packaging - SEAPACK.........................................................................................48
11.4.Refrigerant R134a .................................................................................................................................48
11.5.Electric reheat – RSC............................................................................................................................51
11.6.Crankcase heater for compressor – CRA ......................................................................................51
11.7.Kit for low external temperatures – WINTER KIT........................................................................51
11.8.Main switch - SWT/SWM.....................................................................................................................51
11.9.WIB1000 / WIB1485...........................................................................................................................52
11.10.Voltage Monitoring – VCC.................................................................................................................52
11.11.Monitoring of phase sequence and phase loss (for 3-phase scroll compressors)
– PSCR..................................................................................................................................................................52
11.12.Soft start for three-phase compressor – SOFTT .....................................................................52
11.13.Soft start for single-phase compressor – SOFTM...................................................................55

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IMPORTANT
These operating instructions must be read with care and fully complied with
prior to installing and using the air conditioning system.
Preserve this manual for the entire working life of the model.
This manual reflects the state of the art at the time the product is marketed.
It must not be considered unsuitable merely because it has not been
updated following developments in design and manufacturing methods.
STULZ reserves the right to update the product and the relevant manual
without having to update products and manuals sold previously except
under exceptional circumstances. Contact your local STULZ partner when
requesting or receiving any updates of instruction manuals or corrections
which are considered to be integral parts of the manual.
Comply with the measures specified in the chapter on Safety directions.
For three-phase scroll compressors with on-off control: take care of
correct phase sequence after the connection of the main power supply
(refer to paragraph 6.3)

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7© STULZ SpA . – all rights reserved EN/36B/08.2018
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.
DANGER
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.
INFORMATION
This manual must be kept by the customer and made available to the installation, commissioning,
use and maintenance personnel.
1.1. Symbols used in this manual
DANGER RISK OF INJURY FOR OPERATOR AND POSSIBILITY OF DAM-
AGING THE UNIT
ATTENTION INFORMATION OR WARNING OF CAUTION IN CARRYING OUT A
PROCEDURE
INFORMATION IMPORTANT INFORMATION
1.2. Labels on the unit
DANGER: MOVING COMPONENTS DANGER: HIGH VOLTAGE
DANGER: HOT COMPONENTS
1.3. 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.

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DANGER
• 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.
ATTENTION
• 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; read and follow instructions
in chapter "10. Uninstalling and disposal of the unit".
• 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 main-
tenance 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.
INFORMATION
• The manufacturer is not liable for damages caused by either a misuse or unauthorized modifi-
cations of the air conditioner.
• Any special opening tools have to be placed in a visible location nearby the unit.
1.4. Handling refrigerants
According to EN 378, refrigerants are divided in groups, concerning health and safety. Refrigerant
R407C, used in all Wall-Air Displacement 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.
• 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.

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9© STULZ SpA . – all rights reserved EN/36B/08.2018
• 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.
1.5. 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 EC/97/23 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.
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 8.
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.

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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 (see this manual,
paragraph "3.1. Application limits"). The limit values stipulated in the technical data must not be
exceeded under any circumstances.
2. Unit identification
Technical name-plate
This unit can be identified by the name-plate that includes all information regarding its correct use.
The name-plate is located in two copies on the external casing of the unit (generally on the right
side) and on the cover of the electric box. An example follows (data are purely by way of example):
The name-plate is printed on a
plastic surface to ensure long
durability of the text even in the
toughest ambient conditions.
INFORMATION
For any assistance or information concerning the unit described in this manual, knowledge of its
serial number is essential.

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11© STULZ SpA . – all rights reserved EN/36B/08.2018
IP protection degree
INFORMATION
IP protection degree is the protection, from the outdoor environment, of the unit when installed
in its normal use.
The IP protection degree of STULZ Wall-Air Displacement unit is IPX4 (according to EN 60529,
considering the prescriptions of EN 60335), therefore the unit is protected from harmful effects of
splashing of water against the enclosure from any direction (see picture below).
Outdoor
Indoor
Unit
Shelter wall

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WDE 60 H R 2 42 0C 00 -1Z
EN/36B/08.2018 © STULZ SpA – all rights reserved
Coding
The table summarises the available options for the Wall-Air Displacement family. Some of the
options or combinations are not available on all the products in the family.
Product family
Nominal cooling capacity
Operating method
Type of control system
Application
Main power supply
Compressor - refrigerant
Heating
Combination of options
Colour
0 = no heating
2 = 1.5 kW
3 = 3.0 kW
4 = 4.5 kW
Z = special model(2)
2 = reciprocating compressor + R407C
B = scroll compressor + R134a
C = scroll / rotary(1) compressor + R407C
00 = 230V / 1Ph / 50Hz
42 = 400V / 3Ph + N / 50Hz
2 = standard unit
L = winter kit
T = protective treatment of heat exchangers (TREATW)
A = winter kit + protective treatment of heat exchangers
R = electronic board C2020
P = customer’s external PLC (requires a special code)
U = C2020 + WIB1000
W = C2020 + WIB1485
0 = cooling only
F = cooling + free cooling
H = cooling + free cooling + emergency ventilation 48VDC
According to the technical data sheet
WDE = mono-block unit, external installation, displacement supply
INFORMATION
(1) rotary compressor is used on single-phase model of WDE40 with R407C.
(2) special models are identified with a Z in the third to last digit of the code. The digits following
the Z lose their original meaning and act as the progressive number for special versions.

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2.1. Intended and non-intended use
Intended use
STULZ Wall-Air Displacement conditioners are designed to be installed on the external wall of
rooms / shelters for telecommunication equipment, suitably protected from weather, whose internal
side is not accessible to the general public (see EN 60335240, paragraph 3.119). Use these
conditioners to eliminate the problems caused by high temperatures, dirt and humidity in the room
subject to climate control. Main functions of air treatment are: filtration, cooling, free cooling with
external air, dehumidification (with a specific function available only with accessory ACTRHC1) and
heating (with optional heating resistances).
As well, STULZ Wall-Air Displacement conditioners cannot be used outside safety limits specified
on the name-plate. Conditioners must not be transported or used in positions that differ from those
for which they were designed.
STULZ is not responsible for any malfunctions caused by failure to comply with these instructions.
The operator bears the entire risk.
Non-intended use
Air conditioner cannot be installed on movable, vibrating, oscillating, tilted (non-levelled) parts.
Generally, air conditioner cannot be installed in the following areas:
• With strong heat radiation
• With strong magnetic fields
• With free flames
• With fire risk
• With inflammable products
• With explosive atmosphere
• With saline atmosphere
• With aggressive atmosphere
For any doubt, please consult the manufacturer.

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3. Technical data and drawings
3.1. Application limits
Operation limits
Return air temperature Min +20 °C
Max +40 °C
Return air humidity Min 5,5 °C dew point
Max 60% r.h. and 15 °C dew point
Outdoor temperature Min -20 °C
Max +50 °C
Nominal power supply 400 V / 3 ph +N / 50 Hz
Voltage tolerance ± 10%
Frequency tolerance ± 2%
Storage limits
Temperature Min -20 °C
Max +50 °C
Humidity Max 90%
INFORMATION
Other limits not specified in this table can be found in the rest of this manual.
3.2. Technical data
NOTES ON TECHNICAL DATA:
* Inclusive of power absorbed by evaporator fans. External temperature 35°C / Internal
temperature 30°C / Internal relative humidity 30%
** Sound pressure level at 2 m obtained from the measured sound power according to the EN ISO
96142 on normal condition of use and nominal operating condition.

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15© STULZ SpA . – all rights reserved EN/36B/08.2018
Model WDE40 WDE60 WDE80
Total cooling capacity* kW 4,6 4,6 6,1 8
Sensible cooling capacity kW 4,6 4,6 6,1 8
Refrigerant R407C R407C R407C
Refrigerant charge kg 1,85 2,1 1,9 1,9
EER index (with evap. fan in direct current)* W/W 2,6 3,9 3,3 3,1
EER index (with evap. fan in alternating current)* W/W 2,5 3,7 3,3 3,1
Outside operating limit temperatures min/max °C -20 / +50 -20 / +50 -20 / +50
Inside operating limit temperatures min/max °C +20 / +40 +20 / +40 +20 / +40
External sound pressure level** db(A) 50 51 52
Duty cicle % 100 100 100
Weight kg 170 200 210
Height (including condenser fan) mm 2085 2085 2085
Width mm 879 879 879
Depth mm 565 565 565
Condenser fan
Q.ty / Type 1/axial 1/axial 1/axial
Air flow m3/h 1600 2100 3000
Evaporator fan
Q.ty / Type 1/radial 1/radial 1/radial
Air flow in cooling mode m3/h 1100 1700 2700
Air flow in free cooling mode m3/h 900 1300 1800
Electric data
Nominal voltage V AC 400 230 400 230 400 230
Tolerance on voltage ±10% ±10% ±10% ±10% ±10% ±10%
Phases ph 3+N 1 3+N 1 3+N 1
Frequency Hz 50 50 50
Tolerance on frequency ±2% ±2% ±2%
Auxiliary voltage V AC 24 24 24
Compressor
Power consumption* kW 1,7 1,1 1,7 2,2
Operating current (OA)* A 3,9 5,4 3,1 8,7 4,0 10,5
Maximum operating current (FLA) A 5,4 6,7 4,2 11,4 5,1 14,8
Locked rotor current (LRA) A 22 33 24 47 32 61
Condenser fan
Nominal voltage V AC 230 230 230
Phases ph 1 1 1
Power consumption* kW 0,05 0,10 0,13
Operating current (OA)* A 0,23 0,47 0,63
Maximum operating current (FLA) A 1,2 1,2 1,2
Evaporator fan in direct current
Nominal voltage V DC 48 48 48
Tolerance on DC voltage V DC 36÷57 36÷57 36÷57
Power consumption* kW 0,04 0,07 0,21
Operating current at 48V (OA)* A 1,1 1,4 4,4
Maximum operating current (FLA) A 2,9 12,7 12,7
Evaporator fan in alternating current
Nominal voltage / phases V AC/ph 230/1 230/1 230/1
Power consumption* kW 0,11 0,06 0,24
Operating current (OA)* A 0,9 0,44 1,49
Maximum operating current (FLA) A 1,3 3,1 3,1

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Model WDEA0 WDEA2 WDEA4 WDEA6
Total cooling capacity* kW 10,0 11,8 13,6 15,5
Sensible cooling capacity kW 10,0 11,8 13,6 15,5
Refrigerant R407C R407C R407C R407C
Refrigerant charge kg 4,3 3,95 3,9 3,85
EER index (with evap. fan in direct current)* W/W 3,5 3,7 3,2 3,1
EER index (with evap. fan in alternating current)* W/W 3,5 3,6 3,2 3,0
Outside operating limittemperatures min/max °C -20 / +50 -20 / +50 -20 / +50 -20 / +50
Inside operating limit temperatures min/max °C +20 / +40 +20 / +40 +20 / +40 +20 / +40
External sound pressure level** db(A) 53 54 58 60
Duty cicle % 100 100 100 100
Weight kg 240 240 250 250
Height (including condenser fan) mm 2226 2226 2226 2226
Width mm 992 992 992 992
Depth mm 730 730 730 730
Condenser fan
Q.ty / Type 1/axial 1/axial 1/axial 1/axial
Air flow m3/h 4100 5300 6100 6500
Evaporator fan
Q.ty / Type 1/radial 1/radial 2/radial 2/radial
Air flow in cooling mode m3/h 2400 2800 3600 3600
Air flow in free cooling mode m3/h 2500 2500 3000 3000
Electric data
Nominal voltage V AC 400 230 400 230 400 230 400 230
Tolerance on voltage ±10% ±10% ±10% ±10% ±10% ±10% ±10% ±10%
Phases ph 3+N 1 3+N 1 3+N 1 3+N 1
Frequency Hz 50 50 50 50
Tolerance on frequency ±2% ±2% ±2% ±2%
Auxiliary voltage V AC 24 24 24 24
Compressor
Power consumption* kW 2,4 2,5 3,3 4,1
Operating current (OA)* A 4,2 10,8 5,0 12,6 6,3 17,0 8,0 20,3
Maximum operating current (FLA) A 6,3 17,3 7 23,1 10 23,5 11 30
Locked rotor current (LRA) A 40 76 46 100 50 114 59 150
Condenser fan
Nominal voltage V AC 230 230 230 230
Phases ph 1 1 1 1
Power consumption* kW 0,26 0,45 0,50 0,60
Operating current (OA)* A 1,1 2,0 2,4 2,8
Maximum operating current (FLA) A 1,2 3,0 3,0 3,0
Evaporator fan in direct current
Nominal voltage V DC 48 48 48 48
Tolerance on DC voltage V DC 36÷57 36÷57 36÷57 36÷57
Power consumption* kW 0,16 0,23 0,36 0,36
Operating current at 48V (OA)* A 3,3 4,9 2  3,8 2  3,8
Maximum operating current (FLA) A 12,7 12,7 2  7,3 2  7,3
Evaporator fan in alternating current
Nominal voltage / phases V AC/ph 230/1 230/1 230/1 230/1
Power consumption* kW 0,20 0,30 0,46 0,46
Operating current (OA)* A 1,2 1,8 2  1,3 2  1,3
Maximum operating current (FLA) A 3,1 3,1 2  3,1 2  3,1

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17© STULZ SpA . – all rights reserved EN/36B/08.2018
3.3. Drawings
Overall dimensions WDE 406080

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Overall dimensions WDE A0A2A4A6

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12  holes ø 8
Cut-out WDE 406080 (according to grilles dimension)

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Position of sealing gasket WDE 406080
12  holes ø 8
Sealing gasket
Sealing gasket