Daikin EWAH TZ D Series User manual

Original Instructions
REV
00
Date
05/2023
Supersedes
-
Telepítés, használati és karbantartási útmutató
Air cooled chiller with inverter
driven screw compressor
EWAH~TZ~D
EWAD~TZ~D
EWAS~TZ~D
EWFH~TZ~D
EWFD~TZ~D
EWFS~TZ~D
Installation, Operation and Maintenance Manual
D-EIMAC01905-23_00EN

D–EIMAC01905-23_00EN - 2/53
CONTENTS
1INTRODUCTION .................................................................................................................................................. 10
1.1 Precautions against residual risks........................................................................................................................ 10
1.2 Description............................................................................................................................................................ 11
1.3 Information about R1234ze(E) refrigerant............................................................................................................11
1.4 Information about installation................................................................................................................................12
2RECEIVING THE UNIT ........................................................................................................................................ 14
3OPERATING LIMITS............................................................................................................................................ 15
3.1 Storage .................................................................................................................................................................15
3.2 Operation ..............................................................................................................................................................15
3.3 Corrective factors.................................................................................................................................................. 22
4MECHANICAL INSTALLATION .......................................................................................................................... 24
4.1 Safety.................................................................................................................................................................... 24
Safety devices..................................................................................................................................................................... 24
4.2 Handling and lifting instructions............................................................................................................................25
4.3 Positioning and assembly..................................................................................................................................... 28
4.4 Minumum space requirements .............................................................................................................................28
4.5 Noise and sound protection.................................................................................................................................. 31
4.6 Water circuit for unit connection ........................................................................................................................... 31
Water piping ........................................................................................................................................................................ 31
4.6.2 Kit pump option .......................................................................................................................................................... 32
4.6.3 Flow switch option installation....................................................................................................................................33
4.6.4 Heat recovery option .................................................................................................................................................. 33
4.7 Water treatment .................................................................................................................................................... 33
4.8 Hydronic free cooling system................................................................................................................................ 33
Introduction and system description (P&ID)........................................................................................................................33
Coolant quality requirements............................................................................................................................................... 36
First operations at unit commissioning start........................................................................................................................36
Free cooling purge valve related......................................................................................................................................... 37
Operations in case of failure................................................................................................................................................37
4.9 Evaporator and heat recovery exchangers anti-freeze protection........................................................................37
5ELECTRICAL INSTALLATION............................................................................................................................ 38
5.1 General specifications .......................................................................................................................................... 38
5.2 Electrical supply.................................................................................................................................................... 38
5.3 Electric connections..............................................................................................................................................38
5.4 Cable requirements ..............................................................................................................................................39
5.5 Phase unbalance.................................................................................................................................................. 39
5.6 Electrical panel label description ..........................................................................................................................40
6OPERATOR’S RESPONSIBILITIES.................................................................................................................... 42
7MAINTENANCE ................................................................................................................................................... 43
7.1 Routine maintenance............................................................................................................................................ 43
7.2 Unit Maintenance and cleaning ............................................................................................................................45
Microchannel Coil maintenance .......................................................................................................................................... 46
7.3 Inverter Capacitors................................................................................................................................................ 46
8SERVICE AND LIMITED WARRANTY................................................................................................................ 48
9FIRST START-UP CHECKS................................................................................................................................ 49
10 PERIODIC CHECKS AND COMMISSIONING OF PRESSURE EQUIPMENT................................................... 50
11 IMPORTANT INFORMATION ABOUT THE REFRIGERANT USED.................................................................. 51
11.1 Factory and Field charged units instructions ...................................................................................................51
12 DISMISSION AND DISPOSAL ............................................................................................................................ 52

D–EIMAC01905-23_00EN - 3/53
LIST OF FIGURES
Fig. 1- Refrigerant circuit diagram (P&ID) –MONO circuit units........................................................................................... 4
Fig. 2 - Refrigerant circuit diagram (P&ID) –DUAL circuit units........................................................................................... 6
Fig. 3 –Hydronic Free cooling P&ID..................................................................................................................................... 8
Fig. 4. - Description of the labels applied to the electrical panel........................................................................................... 9
Fig. 5 –EWAH-TZD Blue unit envelope.............................................................................................................................. 16
Fig. 6 –EWAH-TZD Silver unit envelope............................................................................................................................ 16
Fig. 7 –EWAH-TZD Gold and Platinum unit envelope ....................................................................................................... 17
Fig. 8 –EWAD-TZD Blue unit envelope.............................................................................................................................. 17
Fig. 9 –EWAD-TZD Silver unit envelope............................................................................................................................ 18
Fig. 10 –EWAD-TZD Gold and Platinum unit envelope ..................................................................................................... 18
Fig. 11 –EWAS-TZD Blue unit envelope............................................................................................................................ 19
Fig. 12 –EWAS-TZD Silver unit envelope..........................................................................................................................20
Fig. 13 –EWAS-TZD Gold and Platinum unit envelope .....................................................................................................20
Fig. 14 –EWFH-TZD Blue and Silver unit envelope...........................................................................................................21
Fig. 15 –EWFH-TZD Gold and Platinum unit envelope ..................................................................................................... 21
Fig. 16 –EWFD-TZD Blue and Silver unit envelope...........................................................................................................22
Fig. 17 –EWFD-TZD Gold and Platinum unit envelope ..................................................................................................... 22
Fig. 18 - Indirect vented closed system............................................................................................................................... 24
Fig. 19 –Lifting instructions.................................................................................................................................................27
Fig. 20 –Unit levelling......................................................................................................................................................... 28
Fig. 21 - Minimum clearance requirements........................................................................................................................ 29
Fig. 22. –Multiple Chiller Installation .................................................................................................................................. 31
Fig. 23 - Anti-vibration elements (supplied as optional)......................................................................................................31
Fig. 24–Hydraulic diagram (opt. 78-79-80-81/120e-120f-120g-120h) ...............................................................................32
Fig. 25–Hydronic Free cooling P&ID..................................................................................................................................35
Fig. 26–Description of labels applied on the electrical panel small ................................................................................... 40
Fig. 27–Description of labels applied on the electrical panel medium. .............................................................................. 41
Fig. 28–Description of labels applied on the electrical panel large.................................................................................... 41
Fig. 29 –Refrigerant charge label....................................................................................................................................... 51
LIST OF TABLES
Table 1 –Legend refrigerant circuit diagram (P&ID) –MONO circuit units..........................................................................5
Table 2 –Legend refrigerant circuit diagram (P&ID) –DUAL circuit units............................................................................ 7
Table 3 –Legend hydronic Free cooling P&ID ..................................................................................................................... 8
Table 4 –Units PS and TS.................................................................................................................................................... 9
Table 5 - Label Identification................................................................................................................................................. 9
Table 6 - Physical characteristics of refrigerant R1234ze(E).............................................................................................. 11
Table 7 –R1234ze(E) ignition and max temperatures ....................................................................................................... 12
Table 8 –R1234ze(E) LFL value ........................................................................................................................................13
Table 9 –Units environmental conditions ........................................................................................................................... 15
Table 10 –Altitude correction factor ................................................................................................................................... 23
Table 11 –Minimum percentage of glycol in case of low ambient temperature.................................................................23
Table 12 –Legend hydraulic diagram.................................................................................................................................32
Table 13 –Acceptable water quality limits.......................................................................................................................... 33
Table 14 - Legend hydronic Free cooling P&ID ..................................................................................................................35
Table 15 –Free cooling application coolant quality requirements for MCH coils ...............................................................36
Table 16- Table 1 of EN60204-1 Point 5.2.......................................................................................................................... 39
Table 18–General maintenance table................................................................................................................................ 43
Table 19 –Standard Routine Maintenance Plan ................................................................................................................ 44
Table 20 –Routine Maintenance Plan for Critical Application and/or Highly Aggressive Environment ............................. 45
Table 21 –Inverter sizes..................................................................................................................................................... 47
Table 22 –Checks to be performed before starting the unit............................................................................................... 49

D–EIMAC01905-23_00EN - 4/53
Fig. 1- Refrigerant circuit diagram (P&ID) –MONO circuit units

D–EIMAC01905-23_00EN - 5/53
Optional
Safety valves can be provided with a changeover device as optional
Table 1 –Legend refrigerant circuit diagram (P&ID) –MONO circuit units
LEGEND
ID
DESCRIPTION
1
SCREW COMPRESSOR
2
HEAT EXCHANGER (BHPE) - HEAT RECOVERY OPTIONAL
3
PRESSURE RELIEF VALVE Pset = 25,5 bar
4
MICROCHANNEL CONDENSER COIL
5a
DISCHARGE SHUT OFF ANGLE VALVE
5b
DISCHARGE SHUT OFF BALL VALVE
5c
SUCTION SHUT OFF VALVE
6
DRIER FILTER
7
MOISTURE SIGHT GLASS
8
HEAT EXCHANGER (BPHE) ECONOMIZER
9
SOLENOID VALVE (inside compressor)
10
ECONOMIZER ELECTRONIC EXPANSION VALVE
12
ELECTRONIC EXPANSION VALVE
13
BPHE EVAPORATOR
14
PRESSURE RELIEF VALVE Pset = 15,5 bar
15
ACCESS FITTING
16
PRESSURE GAUGE (OPTIONAL)
17
ANGLE VALVE
18
ANTIVIBRATION JOINT * (only for XR/PR or Opt. 76b)
19
ACCESS FITTINGS
19b
TEE ACCESS FITTINGS
20
MUFFLER
21
LIQUID RECEIVER (only with opt.01 THR)
22
STRAINER
f
FLANGED JOINT
e
ELECTRIC HEATER
PT
PRESSURE TRANSDUCER
PZH
HIGH PRESSURE SWITCH 22.7 bar
TZAH
HIGH TEMPERATURE SWITCH (MOTOR THERMISTOR)
PSAL
LOW PRESSURE LIMITER (CONTROLLER FUNCTION)
TT
TEMPERATURE TRANSDUCER
PI
PRESSURE GAUGE
Water inlet and outlet are indicative. Please refer to the machine dimensional diagrams for exact water connections.
The series is composed by MONO (one circuit) and DUAL (two circuits) units.

D–EIMAC01905-23_00EN - 6/53
Fig. 2 - Refrigerant circuit diagram (P&ID) –DUAL circuit units

D–EIMAC01905-23_00EN - 7/53
Optional
Safety valves can be provided with a changeover device as optional
Table 2 –Legend refrigerant circuit diagram (P&ID) –DUAL circuit units
LEGEND
ID
DESCRIPTION
1
SCREW COMPRESSOR
2
HEAT EXCHANGER (BHPE) - HEAT RECOVERY OPTIONAL
3
PRESSURE RELIEF VALVE Pset = 25,5 bar
4
MICROCHANNEL CONDENSER COIL
5a
DISCHARGE SHUT OFF ANGLE VALVE
5b
DISCHARGE SHUT OFF BALL VALVE
5c
SUCTION SHUT OFF VALVE
6
DRIER FILTER
7
MOISTURE SIGHT GLASS
8
HEAT EXCHANGER (BPHE) ECONOMIZER
9
SOLENOID VALVE (inside compressor)
10
ECONOMIZER ELECTRONIC EXPANSION VALVE
12
ELECTRONIC EXPANSION VALVE
13
SHELL&TUBES EVAPORATOR
14
PRESSURE RELIEF VALVE Pset = 15,5 bar
15
ACCESS FITTING
16
PRESSURE GAUGE (OPTIONAL)
17
ANGLE VALVE
18
ANTIVIBRATION JOINT * (only for XR/PR or Opt. 76b)
19
ACCESS FITTINGS
20
MUFFLER
21
LIQUID RECEIVER (only with opt.01 THR)
22
STRAINER
f
FLANGED JOINT
e
ELECTRIC HEATER
PT
PRESSURE TRANSDUCER
PZH
HIGH PRESSURE SWITCH 22.7 bar
TZAH
HIGH TEMPERATURE SWITCH (MOTOR THERMISTOR)
PSAL
LOW PRESSURE LIMITER (CONTROLLER FUNCTION)
TT
TEMPERATURE TRANSDUCER
PI
PRESSURE GAUGE
Water inlet and outlet are indicative. Please refer to the machine dimensional diagrams for exact water connections.
The series is composed by MONO (one circuit) and DUAL (two circuits) units.

D–EIMAC01905-23_00EN - 8/53
Fig. 3 –Hydronic Free cooling P&ID
Table 3 –Legend hydronic Free cooling P&ID
LEGEND
ID
DESCRIPTION
19
ACCESS FITTING 1/4” NPT
d
VALVE
f
SAFETY VALVE 10 BAR 1/2” MF
h
AIR VENT 3/8” NPT /TBC)
i
DRAIN 1/4” NPT
r
WATER FILTER
t
TWO WAY VALVE MOTORIZED
u
WATER FILTER
v
FREECOOLING COIL
La
WATER IN LINE
Lh
WATER IN MANIFOLD
Lc
WATER IN COIL
Ld
WATER OUT COIL (FLEXIBLE)
Le
WATR OUT MANIFOLD
Lf
FREECOOLING COIL BYPASS
Lg
EVAPORATOR WATER IN
Lb
EVAPORATOR WATER OUT
TT
TEMPERATURE SENSOR
Water inlet and outlet are indicative. Please refer to the machine dimensional diagrams for exact water connections.
The series is composed by MONO (one circuit) and DUAL (two circuits) units.

D–EIMAC01905-23_00EN - 9/53
Table 4 –Units PS and TS
REFRIGERANT
PED/PER
GROUP
LINE
PS [bar]
TS [°C]
R134a
R1234ze
R513a
2
HIGH PRESSURE GAS
25.5
+10/+120°C
HIGH PRESSURE LIQ
25.5
-10/+80°C
LOW PRESSURE
15.5
-20/+80°C
WATER CIRCUITS
WATER IN/OUT
10
-15/+55°C
Fig. 4. - Description of the labels applied to the electrical panel
Table 5 - Label Identification
1
–Manufacturer’s logo
5
–Cable tightening warning
2
–Gas type
6
–Transportation Label UN2857
3
–Hazardous Voltage warning
7
–Unit nameplate data
4
–Electrical hazard symbol
8
–Lifting instruction

D–EIMAC01905-23_00EN - 10/53
1 INTRODUCTION
This manual is an important supporting document for qualified personnel, but it is not intended to replace such
personnel.
READ THIS MANUAL CAREFULLY BEFORE INSTALLING AND STARTING UP THE UNIT.
IMPROPER INSTALLATION COULD RESULT IN ELECTRIC SHOCK, SHORT-CIRCUIT, LEAKS, FIRE
OR OTHER DAMAGE TO THE EQUIPMENT OR INJURE TO PEOPLE.
THE UNIT MUST BE INSTALLED BY A PROFESSIONAL OPERATOR/TECHNICIAN
UNIT STARTUP HAS TO BE PERFORMED BY AUTHORIZED AND TRAINED PROFESSIONAL
ALL ACTIVITIES HAVE TO BE PERFORMED ACCORDING TO LOCAL LAWS AND REGULATION.
UNIT INSTALLATION AND START UP IS ABOSOLUTELY FORBIDDEN IF ALL INSTRUCTION
CONTAINED IN THIS MANUAL ARE NOT CLEAR.
IF CASE OF DOUBT CONTACT THE MANUFACTURER REPRESENTATIVE FOR ADVICE AND
INFORMATION.
1.1 Precautions against residual risks
1. Install the unit according to the instructions set out in this manual
2. Regularly carry out all the maintenance operations foreseen in this manual
3. Wear protective equipment (gloves, eye protection, hard hat, etc.) suited to the work in hand; do not wear clothes
or accessories that can get caught orsucked in by flows of air; tie back long hair before entering the unit
4. Before opening the machine panelling make sure that it is firmly hinged to the machine
5. The fins on heat exchangers and the edges of metal components and panels can cause cuts
6. Do not remove the guards from mobile components while the unit is operating
7. Make sure that mobile component guards are fitted correctly before restarting the unit
8. Fans, motors and belts drives might be running: before entering, always wait for these to stop and take
appropriate measures to prevent them from starting up
9. The surfaces of the machine and pipes can get very hot or cold and cause the risk of scalding
10. Never exceed the maximum pressure limit (PS) of the water circuit of the unit.
11. Before removing parts on the pressurised water circuits, close the section of the piping concerned and drain the
fluid gradually to stabilise the pressure at the atmospheric level
12. Do not use your hands to check possible refrigerant leaks
13. Disable the unit from the mains using the main switch before opening the control panel
14. Check that the unit has been grounded correctly before starting it
15. Install the machine in a suitable area; in particular, do not install it outdoors if it is intended for use indoors
16. Do not use cables with inadequate sections nor extension cord connections, even for very short periods or
emergencies
17. For units with power correction capacitors, wait 5 minutes after removing the electric power supply before
accessing the inside of the switch board
18. If the unit is equipped with compressors with integrated inverter, disconnect it from the mains and wait a minimum
of 20 minutes before accessing it to carry out maintenance: residual energy in the components, which takes at
least this length of time to dissipate, poses the risk of electrocution
19. The unit contains pressurised refrigerant gas: the pressurised equipment must not be touched except during
maintenance, which must be entrusted to qualified and authorised personnel
20. Connect up the utilities to the unit following the indications set out in this manual and on the panelling of the unit
itself
21. In order to avoid an environmental risk, make sure that any leaking fluid is collected in suitable devices in
accordance with local regulations.
22. If a part needs to be dismantled, make sure it is correctly re-assembled before starting the unit
23. When the rules in force require the installation of fire-fighting systems near the machine, check that these are
suitable for extinguishing fires on electrical equipment and on the lubricating oil of the compressor and the
refrigerant, as specified on the safety data sheets of these fluids
24. When the unit is equipped with devices for venting overpressure (safety valves): when these valves are triggered,
the refrigerant gas is released at a high temperature and speed; prevent the release of gas from harming people
or objects and, if necessary, discharge the gas according to the provisions of EN 378-3 and the local regulations
in force.
25. Keep all the safety devices in good working order and check them periodically according to the regulations in force
26. Keep all lubricants in suitably marked containers
27. Do not store inflammable liquids near the unit
28. Solder or braze only empty pipes after removing all traces of lubricant oil;do not use flames or other heat sources
in the vicinity of pipes containing refrigerant fluid
29. Do not use naked flames near the unit
30. The machinery must be installed in structures protected against atmospheric discharge according to the
applicable laws and technical standards
31. Do not bend or hit pipes containing pressurised fluids
32. It is not permitted to walk or rest other objects on the machines

D-EIMAC01603-18_04EN- 11/53
33. The user is responsible for overall evaluation of the risk of fire in the place ofinstallation (for example, calculation
of the fire load)
34. During transport, always secure the unit to the bed of the vehicle to prevent it from moving about and overturning
35. The machine must be transported according to the regulations in force taking into account the characteristics
of the fluids in the machine and the description of these on the safety data sheet
36. Inappropriate transport can cause damage to the machine and even leaking of the refrigerant fluid. Before
startup, the machine must be checked for leaks and repaired accordingly.
37. The accidental discharge of refrigerant in a closed area can cause a lack of oxygen and, therefore, the risk of
asphyxiation: install the machinery in a well ventilated environment according to EN 378-3 and the local
regulations in force.
38. The installation must comply with the requirements of EN 378-3 and the local regulations in force; in the case
of installations indoors, good ventilation must be guaranteed and refrigerant detectors must be fitted when
necessary.
1.2 Description
The unit you bought is an “air cooled chiller”, a machine aimed to cool water (or water-glycol mixture) within the limits
described in the following manual. The unit operation is based on vapour compression, condensation and evaporation
according to the inverse Carnot cycle. The main components are:
- Screw compressor to rise the refrigerant vapour pressure from evaporating pressure to condensing pressure
- Condenser, where high pressure vapour condensates rejecting heat removed from the chilled water in the
atmosphere thanks to an air-cooled heat exchanger.
- Expansion valve allowing to reduced the pressure of condensed liquid from condensing pressure to evaporating
pressure.
- Evaporator, where the low pressure liquid refrigerant evaporates to cool the water
EWFD-TZD, EWFH-TZD and EWFS-TZD ranges are equipped with hydronic free cooling systems. When free cooling
mode is active (below a specific OAT), water-glycol mixture flows through dedicated MCH coils before entering the
evaporator. The water-glycol mixture is cooled down thanks to outside air.
All units are delivered with wiring diagrams,certified drawings, nameplate; and DOC (Declaration Of Conformity);
these documents show all technical data for the unit you have bought and they MUST BE CONSIDERED ESSENTIAL
DOCUMENTS OF THIS MANUAL.
In case of any discrepancy between this manual and the equipment’s documents please refer to on board documents . In
case of any doubt contact the manufacturer representative.
The purpose of this manual is to allow the installer and the qualified operator to ensure proper installation, commissioning
and maintenance of the unit, without any risk to people, animals and/or objects.
1.3 Information about R1234ze(E) refrigerant
This product can be equipped with refrigerant R1234ze(E) which has minimal impact to the environment, thanks to its low
value of Global Warming Potential (GWP).
R1234ze(E) refrigerant is classified by European Directive 2014/68/EU as a Group 2 (non-dangerous) substance, as it is
nonflammable at standard ambient temperature and non-toxic. Due to this, no special precautions are required for
storage, transport and handling.
Daikin Applied Europe S.p.A. products comply with applicable European Directives and refer for unit design to product
Standard EN378:2016 and industrial Standard ISO5149. Local authorities approval should be verified referring to
European Standard EN378 and/or ISO 5149 (where R1234ze(E) is classified A2L –Mildly flammable gas).
Table 6 - Physical characteristics of refrigerant R1234ze(E)
Safety Class
A2L
PED Fluid Group
2
Pratical limit (kg/m3)
0 061
ATEL/ ODL (kg/m3)
0,28
LFL (kg/m3)@ 60°C
0 303
Vapour density @25°C, 101.3 kPa (kg/m3)
4,66
Molecular Mass
114,0
Normal Boling Point (°C)
-19
GWP (100 yr ITH)
7
GWP (ARS 100 yr ITH)
<1
Auto Ignition Temperature (°C)
368

D–EIMAC01905-23_00EN - 12/53
1.4 Information about installation
The chiller has to be installed in open air or machinery room (location classification III).
To ensure location classification III a mechanical vent on the secondary circuit(s) has to be installed.
Local building codes and safety standards shall be followed; in absence of local codes and standards refer to EN 378-
3:2016 as a guide.
In paragraph “Additional guidelines for safe use of R1234ze(E)” there are provided additional informations that should be
added to the requirements of safety standards and building codes.
Additional guidelines for safe use of R1234ze(E) for equipment located in the open air
Refrigerating systems sited in the open air shall be positioned to avoid leaked refrigerant flowing into a building or otherwise
endangering people and property.
The refrigerant shall not be able to flow into any ventilation fresh air opening, doorway, trap door or similar opening in the
event of a leak. Where a shelter is provided for refrigerating equipment sited in the open air it shall have natural or forced
ventilation.
For refrigeration systems installed outside in a location where a release of refrigerant can stagnate e.g. below ground, then
the installation shall comply with the requirements for gas detection and ventilation of machinery rooms.
Additional guidelines for safe use of R1234ze(E) for equipment located in a machinery room
When a machinery room is chosen for the location of the refrigerating equipment it shall be located in accordance with
local and national regulations. The following requirements (according to EN 378-3:2016) can be used for the assessment.
•A risk analysis based on the safety concept for the refrigerating system (as determined by the manufacturer and
including the charge and safety classification of the refrigerant used) shall be conducted to determine whether it
is necessary to place the refrigerating system in a separate refrigeration machinery room.
•Machinery rooms should not be used as occupied spaces. The building owner or user shall ensure that access
is permitted only by qualified and trained personnel doing the necessary maintenance to the machinery room or
general plant.
•Machinery rooms shall not be used for storage with the exception of tools, spare parts and compressor oil for
the installed equipment. Any refrigerants, or flammable or toxic materials shall be stored as required by national
regulations.
•Open (naked) flames shall not be permitted in machinery rooms, except for welding, brazing or similar activity
and then only provided the refrigerant concentration is monitored and adequate ventilation is ensured. Such
open flames shall not be left unattended.
•A remote switching (emergency type) for stopping the refrigerating system shall be provided outside the room
(near the door). A similar acting switch shall be located at a suitable location inside the room.
•All piping and ducting passing throught floors, ceiling and walls of machinery room shall be sealed.
•Hot surfaces shall not exceed a temperature of 80 % of the auto-ignition temperature (in °C) or 100 K less than
the auto-ignition temperature of the refrigerant, whichever is higher.
Table 7 –R1234ze(E) ignition and max temperatures
Refrigerant
Auto ignition temperature
Maximum surface temperature
R1234ze(E)
368 °C
268 °C
•Machinery rooms shall have doors opening outward and sufficient in number to ensure freedom for persons to
escape in an emergency; the doors shall be tight fitting, self-closing and so designed that they can be opened
from inside (antipanic system).
•Special machinery rooms where the refrigerant charge is above the practical limit for the volume of the room
shall have a door that either opens directly to the outside air or through a dedicated vestibule equipped with
self-closing, tight-fitting doors.
•The ventilation of machinery rooms shall be sufficient both for normal operating conditions and emergencies.
•Ventilation for normal operating conditions shall be in accordance with national regulations.
•The emergency mechanical ventilation system shall be activated by a detector(s), located in the machinery
room.
oThis ventilation system shall be:
▪independent of any other ventilation system on the site.
▪provided with two independent emergency controls one located outside the machinery room,
and the other inside.
oThe emergency exhaust ventilation fan shall:
▪Be either in the air flow with the motor outside the airflow, or rated for hazardous areas
(according to the assessment).
▪Be located to avoid pressurization of the exhaust ductwork in the machinery room.
▪not cause sparks to occur if it contacts the duct material.
oAirflow of the emergency mechanical ventilation shall be at least
    

where
V is the air flow rate in m3/s;
m is the mass of refrigerant charge, in kg, in the refrigerating system with the largest charge, any
part of which is located in the machinery room;
0.014 is a conversion factor.

D–EIMAC01905-23_00EN - 13/53
oMechanical ventilation shall be operated continuously or shall be switched on by the detector.
•Detector shall automatically activate an alarm, start mechanical ventilation and stop the system when it triggers.
•The location of detectors shall be chosen in relation to the refrigerant and they shall be located where the
refrigerant from the leak will concentrate.
•The positioning of the detector shall be done with due consideration of local airflow patterns, accounting for
location sources of ventilation and louvers. Consideration shall also be given to the possibility of mechanical
damage or contamination.
•At least one detector shall be installed in each machinery room or the occupied space being considered and/or
at the lowest underground room for refrigerants heavier than air and at the highest point for refrigerants lighter
than air.
•Detectors shall be continuously monitored for functioning. In the case of a detector failure, the emergency
sequence should be activated as if refrigerant had been detected.
•The pre-set value for the refrigerant detector at 30 °C or 0 °C, whichever is more critical, shall be set to 25
% of the LFL. The detector shall continue to activate at higher concentrations.
Table 8 –R1234ze(E) LFL value
Refrigerant
LFL
Pre-set alarm
R1234ze(E)
0,303 kg/m3
0,07575 kg/m316500 ppm
•All electrical equipment (not only the refrigerating system) shall be selected to be suitable for use in the zones
identified in the risk assessment. Electrical equipment shall be deemed to comply with the requirements if the
electrical supply is isolated when the refrigerant concentration reaches 25 % of the lower flammable limit or
less.
•Machinery rooms or special machinery rooms shall be clearly marked as such on the entrances to the room,
together with warning notices indicating that unauthorized persons shall not enter and that smoking, naked light
or flames are prohibited. The notices shall also state that, in the event of an emergency, only authorized persons
conversant with emergency procedures shall decide whether to enter the machinery room. Additionally, warning
notices shall be displayed prohibiting unauthorized operation of the system
•The owner / operator shall keep an updated logbook of the refrigerating system.
The optional leak detector supplied by DAE with the chiller should be used exclusively to check
refrigerant leakage from the chiller itself

D–EIMAC01905-23_00EN - 14/53
2 RECEIVING THE UNIT
Inspect the unit immediately after delivery. Make sure that the machine is intact in all its parts and that there are no
deformations due to impacts. All components described in the delivery note must be inspected and checked.
Should any damage occur upon receipt of the machine, do not remove the damaged material and immediately make a
written complaint to the transport company, requesting the inspection of the unit; do not repair until inspection by the
transport company representative is carried out. Immediately report the damage to the manufacturer representative, a set
of photographs is helpful in recognizing responsibility.
Unit restitution is intended as ex-factory Daikin Applied Europe S.p.A.
Daikin Applied Europe S.p.A. declines all responsibility for any damage that the machine may suffer during transport to the
destination.
Use extreme caution when handling the unit to prevent damage to components.
Before installing the unit, check that the model and power supply voltage shown on the nameplate are correct.
Responsibility for any damage after acceptance of the unit cannot be attributed to the manufacturer.

D–EIMAC01905-23_00EN - 15/53
3 OPERATING LIMITS
3.1 Storage
If the unit needs to be stored before installation, it is necessary to follow some precautions:
- Do not remove the protective plastic.
- Protect the unit from dust, bad weather and any rodents.
- Do not expose the unit to direct sunlight.
- Do not use heat sources and / or open flames near the machine.
Although the unit is covered with a heat-shrink plastic sheet, it is not intended for long-term storage and must be removed
and replaced by tarpaulins or the like, more suitable for a longer period.
Environmental conditions must be within the following limits:
Table 9 –Units environmental conditions
Minimum ambient temperature
-20°C
Maximum ambient temperature
+56°C
Maximum R.H.
95% not condensing
Storing below the minimum temperature may cause damage to components. Storing above the maximum temperature
results in safety valves opening, with subsequent refrigerant loss. Storing in a humid atmosphere may damage electronic
components.
3.2 Operation
TZD range of chillers is available with three refrigerants:
- R1234ze (EWAH)
- R134a (EWAD)
- R513a (EWAS)
The following mentioned values represent a guideline, please refer to the Chiller Selection Software (CSS) for real
operating limits for the specific model. For free cooling units, the free cooling mode can be activated only when the
ambient air temperature is at least 0÷10 °C lower than the outlet water temperature.
As a general rule, the unit should be operated with an evaporator water flow rate between 50% and 120% of nominal flow
rate (at standard operating conditions), however check with the chiller selection software the correct minimum and
maximum allowed values for the specific model.
Operation out of the mentioned limits may damage the unit.
In case of any doubt, contact manufacturer representative.
EWAH-TZD
OAT
Outside ambient air temperature
ELWT
Evaporator leaving water temperature
Ref 1
Operation with ELWT < 4 °C requires Option 08 (brine) and glycol
Ref 2
Operation with ELWT > 18 °C requires Option 187 (high evaporator leaving water temperature)
Ref 3
Operation requires option 142 (High ambient temperature kit)
Ref 4
Operation at outside ambient air temperature < 5 °C requires option 229 (fan speed modulation) or option 42
(Speedroll)
The charts shown in these pages constitute a guideline on operating limits in the range.
Refer to the CSS selection software for the actual operating limits in the working conditions for each model.

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Fig. 5 –EWAH-TZD Blue unit envelope
Fig. 6 –EWAH-TZD Silver unit envelope

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Fig. 7 –EWAH-TZD Gold and Platinum unit envelope
EWAD-TZD
OAT
Outside ambient air temperature
ELWT
Evaporator leaving water temperature
Ref 1
Operation with ELWT < 4 °C requires Option 08 (brine) and glycol
Ref 2
Operation with ELWT > 18 °C requires Option 187 (high evaporator leaving water temperature)
Ref 3
Operation requires option 142 (High ambient temperature kit)
Ref 4
Operation at outside ambient air temperature < 5 °C requires option 229 (fan speed modulation) or option 42
(Speedroll)
The charts shown in these pages constitute a guideline on operating limits in the range.
Refer to the CSS selection software for the actual operating limits in the working conditions for each model.
Fig. 8 –EWAD-TZD Blue unit envelope

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Fig. 9 –EWAD-TZD Silver unit envelope
Fig. 10 –EWAD-TZD Gold and Platinum unit envelope

D–EIMAC01905-23_00EN - 19/53
EWAS-TZD
OAT
Outside ambient air temperature
ELWT
Evaporator leaving water temperature
Ref 1
Operation with ELWT < 4 °C requires Option 08 (brine) and glycol
Ref 2
Operation with ELWT > 18 °C requires Option 187 (high evaporator leaving water temperature)
Ref 3
Operation requires option 142 (High ambient temperature kit)
Ref 4
Operation at outside ambient air temperature < 5 °C requires option 229 (fan speed modulation) or option 42
(Speedroll)
The charts shown in these pages constitute a guideline on operating limits in the range.
Refer to the CSS selection software for the actual operating limits in the working conditions for each model.
Fig. 11 –EWAS-TZD Blue unit envelope

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Fig. 12 –EWAS-TZD Silver unit envelope
Fig. 13 –EWAS-TZD Gold and Platinum unit envelope