D-EIMAC01603-18_04EN- 11/53
33. The user is responsible for overall evaluation of the risk of fire in the place of installation (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/m
3
)
0 061
ATEL/ ODL (kg/m
3
)
0,28
LFL (kg/m
3
)@ 60°C
0 303
Vapour density @25°C, 101.3 kPa (kg/m
3
)
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