EWWD-I-_EWLD-I-_IOM_D-EIMWC00404-14EN

EWWD-I-_EWLD-I-_IOM_D-EIMWC00404-14EN
Installation, Operation and Maintenance Manual
D–EIMWC00404-14EN
Water-cooled screw chillers
EWWD 340 ÷ C18 I-SS
EWWD 360 ÷ C12 I-XS
EWLD 320 ÷ C17 I-SS
50Hz – Refrigerant: R-134a
Original Instructions
Contents
Contents............................................................................................................................................................................. 2
General information .......................................................................................................................................................... 6
Warnings for the operator ................................................................................................................................................. 6
Assistance ........................................................................................................................................................................ 6
Spare parts ....................................................................................................................................................................... 6
Receiving the machine ..................................................................................................................................................... 6
Checks ............................................................................................................................................................................. 7
Purpose of this manual ..................................................................................................................................................... 7
Important information on the refrigerant used ................................................................................................................... 7
NOMENCLATURE ........................................................................................................................................................... 8
002 = Second order this model (1 or more units) ........................................................................................................... 8
… = … order this model ............................................................................................................................................... 8
Technical Specifications ................................................................................................................................................... 9
Sound pressure levels .................................................................................................................................................... 22
Sound pressure correction factors for different distances............................................................................................... 24
Operating limits ............................................................................................................................................................... 25
Storage ........................................................................................................................................................................... 25
Operation........................................................................................................................................................................ 25
Mechanical Installation ................................................................................................................................................... 28
Shipping ......................................................................................................................................................................... 28
Responsibility ................................................................................................................................................................. 28
Safety ............................................................................................................................................................................. 28
Handling and lifting ......................................................................................................................................................... 28
Positioning and assembly ............................................................................................................................................... 29
Minimum space requirements ........................................................................................................................................ 30
Ventilation....................................................................................................................................................................... 30
Sound protection ............................................................................................................................................................ 30
Water piping ................................................................................................................................................................... 30
Water treatment.............................................................................................................................................................. 32
Evaporator and exchangers anti-freeze protection ......................................................................................................... 32
Installing the flow switch ................................................................................................................................................. 32
Pressure drops ................................................................................................................................................................ 34
Total heat recovery (option on request) ........................................................................................................................ 39
Partial Heat recovery (option on request) ..................................................................................................................... 41
Electrical Installation ...................................................................................................................................................... 42
General specifications .................................................................................................................................................... 42
Electrical components .................................................................................................................................................... 45
Electrical wiring .............................................................................................................................................................. 45
Oil Heaters ..................................................................................................................................................................... 45
Water pump control ........................................................................................................................................................ 45
Unit On/Off remote control – Electrical wiring ................................................................................................................. 45
Double Setpoint – Electrical wiring ................................................................................................................................. 45
External water Setpoint reset – Electrical wiring (Optional) ............................................................................................ 45
Unit limitation – Electrical wiring (Optional) .................................................................................................................... 46
Guidelines for remote condenser application .............................................................................................................. 47
Refrigerant piping design................................................................................................................................................ 47
Determining Equivalent Line Length ............................................................................................................................... 48
Liquid Line Sizing ........................................................................................................................................................... 49
Discharge (Hot Gas) Line Sizing .................................................................................................................................... 49
Oil Charge ...................................................................................................................................................................... 50
Operation ......................................................................................................................................................................... 51
Operator’s responsibilities .............................................................................................................................................. 51
Description of the machine ............................................................................................................................................. 51
Description of the refrigeration cycle .............................................................................................................................. 51
Description of the refrigeration cycle with partial heat recovery...................................................................................... 51
Controlling the partial recovery circuit and installation recommendations ...................................................................... 52
Compression process ..................................................................................................................................................... 67
Pre-startup checks .......................................................................................................................................................... 70
General........................................................................................................................................................................... 70
Units with external water pump ...................................................................................................................................... 71
Electrical power supply ................................................................................................................................................... 71
Unbalance in power supply voltage ................................................................................................................................ 71
Oil Heaters power supply ............................................................................................................................................... 71
Emergency Stop ............................................................................................................................................................. 71
Startup procedure ........................................................................................................................................................... 72
Turning on the machine .................................................................................................................................................. 72
D–EIMWC00404-14EN - 2/86
Seasonal shutdown ........................................................................................................................................................ 73
Starting up after seasonal shutdown .............................................................................................................................. 73
System maintenance....................................................................................................................................................... 74
General........................................................................................................................................................................... 74
Compressor maintenance .............................................................................................................................................. 74
Lubrication ...................................................................................................................................................................... 74
Routine maintenance ..................................................................................................................................................... 76
Replacement of filter dryer ............................................................................................................................................. 76
Procedure to replace the filter dryer cartridge ................................................................................................................ 76
Replacement of the oil filter ............................................................................................................................................ 77
Fr4200 compressor ........................................................................................................................................................ 78
Oil filter replacement procedure ..................................................................................................................................... 78
Procedure to replace oil filter .......................................................................................................................................... 78
Refrigerant charge .......................................................................................................................................................... 79
Refrigerant filling procedure ........................................................................................................................................... 79
Standard Checks ............................................................................................................................................................. 80
Temperature and pressure sensors ............................................................................................................................... 80
Test sheet ........................................................................................................................................................................ 81
Water side measurements.............................................................................................................................................. 81
Refrigerant side measurements ..................................................................................................................................... 81
Electrical measurements ................................................................................................................................................ 81
Service and limited warranty.......................................................................................................................................... 83
Obligatory routine checks and starting up apparatuses under pressure .................................................................. 84
84
List of tables
Table 1 - Acceptable water quality limits ...................................................................................................................... 32
Table 2 - Equivalent Lengths (in meters) ...................................................................................................................... 49
Table 3 - Liquid line sizes ............................................................................................................................................... 49
Table 4 - Discharge line sizes ........................................................................................................................................ 50
Table 5 – Typical operating conditions with compressors at 100% ........................................................................... 72
Table 6 – Routine maintenance programme (Note 2) ................................................................................................... 76
List of Figures
Fig. 1 - Lifting the unit ........................................................................................................................................................ 29
Fig. 2 - Minimum clearance requirements for machine maintenance ................................................................................ 30
Fig. 3 - Water piping connection for evaporator ................................................................................................................ 31
Fig. 4 - Water piping connection for condenser and heat recovery ................................................................................... 31
Fig. 5 - Adjusting the safety flow switch............................................................................................................................. 33
Fig. 6 - User connection to the interface terminal board .................................................................................................... 46
Fig. 7 - Condenser Located with No Elevation Difference ................................................................................................. 47
Fig. 8 - Condenser Located above Chiller Unit .................................................................................................................. 48
Fig. 9 - Condenser Located below Chiller Unit .................................................................................................................. 48
Fig. 10 - Refrigeration cycle of the EWWD I-SS Single Circuit .......................................................................................... 53
Fig. 11 - Refrigeration cycle of the EWLD I-SS Single Circuit ........................................................................................... 54
Fig. 12 - Refrigeration cycle of the EWLD I-SS + Liquid Receiver Single Circuit .............................................................. 55
Fig. 13 - Refrigeration cycle of the EWWD Single Circuit – Total heat recovery ............................................................... 56
Fig. 14 - Refrigeration cycle of the EWWD I-XS Single Circuit .......................................................................................... 57
Fig. 15 - Refrigeration cycle of the EWWD I-SS Double Circuits....................................................................................... 58
Fig. 16 - Refrigeration cycle of the EWLD I-SS Double Circuits ........................................................................................ 59
Fig. 17 - Refrigeration cycle of the EWLD I-SS + Liquid Receiver Double Circuits ........................................................... 60
Fig. 18 - Refrigeration cycle of the EWWD Double Circuits – Total heat recovery ............................................................ 61
Fig. 19 - Refrigeration cycle of the EWWD I-XS Double Circuits....................................................................................... 62
Fig. 20 - Refrigeration cycle of the EWWD I-SS Trial Circuits ........................................................................................... 63
Fig. 21 - Refrigeration cycle of the EWLD I-SS Trial Circuits ............................................................................................ 64
Fig. 22 - Refrigeration cycle of the EWLD I-SS + Liquid Receiver Trial Circuits ................................................................ 65
Fig. 23 - Refrigeration cycle of the EWWD Trial Circuits – Total heat recovery ................................................................ 66
Fig. 24 - Picture of Fr4100 compressor ............................................................................................................................. 67
Fig. 25 - Compression process ......................................................................................................................................... 68
Fig. 26 - Refrigeration capacity control mechanism of compressor Fr4 ............................................................................ 69
Fig. 27 - Installation of control devices for Fr4 compressor ............................................................................................... 75
D–EIMWC00404-14EN - 3/86
IMPORTANT
The present Installation and Maintenance Manual is drawn up for information only and does not constitute an offer
binding upon Daikin
Specifications are subject to change without prior notice. Refer to the data communicated at the time of the order as
per the “Documents Certified” such as “Dimensional Drawings”, “Wiring diagrams” and “Nameplate”. Daikin explicitly
reject any liability for any direct or indirect damage, in the broadest sense, arising from or related to the use and/or
interpretation of this Installation and Maintenance Manual.
WARNING
Before starting the installation of the unit, please read this manual carefully. Starting up the unit is absolutely
forbidden if all instructions contained in this manual are not clear.
Key to symbols
Important note: failure to respect the instruction can damage the unit or compromise functioning
Note regarding safety in general or respect of laws and regulations
Note concerning electrical safety
Description of the labels applied to the electrical panel
Single compressor Unit
1 – Lifting instructions
2 – Unit nameplate data
3 – Non flammable gas symbol
4 – Manufacturer’s logo
5 – Emergency stop
D–EIMWC00404-14EN - 4/86
6 – Gas type
7 – Hazardous Voltage warning
8 – Cable tightening warning
9 – Water circuit filling warning
10 – Electrical hazard symbol
Two Compressors Unit
1 – Unit nameplate data
2 – Lifting instructions
3 – Hazardous Voltage warning
4 – Cable tightening warning
5 – Water circuit filling warning
6 – Non flammable gas symbol
7 – Manufacturer’s logo
8 – Gas type
9 – Electrical hazard symbol
10 – Emergency stop
Three Compressors Unit
1 – Unit nameplate data
2 – Lifting instructions
3 – Cable tightening warning
4 – Non flammable gas symbol
5 – Water circuit filling warning
6 – Hazardous Voltage warning
7 – Manufacturer’s logo
8 – Gas type
9 – Electrical hazard symbol
10 – Emergency stop
D–EIMWC00404-14EN - 5/86
General information
IMPORTANT
The units described in the present manual represent a valuable investment. Maximum care should be taken to
ensure correct installation and appropriate working conditions of the units.
A maintenance contract with a authorized service centre is highly recommended.
CAUTION
This manual provides information about the features and procedures for the complete series.
All units are delivered from factory as complete sets which include wiring diagrams and dimensional drawings with
size, weight and features of each model.
WIRING DIAGRAMS AND DIMENSIONAL DRAWINGS MUST BE CONSIDERED ESSENTIAL DOCUMENTS OF
THIS MANUAL
In case of any discrepancy between this manual and the two aforesaid documents, please refer to the wiring diagram
and dimensional drawings.
IMPORTANT
The present Installation and Maintenance Manual is drawn up for information only and does not constitute an offer
binding upon Daikin
Specifications are subject to change without prior notice. Refer to the data communicated at the time of the order as
per the “Documents Certified” such as “Dimensional Drawings”, “Wiring diagrams” and “Nameplate”. Daikin explicitly
reject any liability for any direct or indirect damage, in the broadest sense, arising from or related to the use and/or
interpretation of this Installation and Maintenance Manual.
Key to symbols
Important note: failure to respect the instruction can damage the unit or compromise functioning
Note regarding safety in general or respect of laws and regulations
Note concerning electrical safety
Safe use and maintenance of the unit, as explained in this manual, is fundamental to prevent accidents during operation
and maintenance and repair work.
Therefore, it is highly recommended that this document be read carefully, complied with and stored safely.
Warnings for the operator
The operator must read this manual before using the unit.
The operator must be trained and instructed on how to use the unit.
The operator must strictly follow local safety regulation and laws.
The operator must strictly follow all instruction and limitation given for the unit
Assistance
Should additional maintenance be required, it is advisable to consult authorised staff before carrying out any repair work.
Spare parts
Spare parts to be used for maintenance of the unit must be original. Therefore, always consult the manufacturer.
Receiving the machine
The machine must be inspected for any possible damage immediately upon reaching its final place of installation. All
components described in the delivery note must be carefully inspected and checked; any damage must be reported to
the carrier. Before connecting the machine to earth, check that the model and power supply voltage shown on the
nameplate are correct. Responsibility for any damage after acceptance of the machine cannot be attributed to the
manufacturer.
D–EIMWC00404-14EN - 6/86
Checks
To prevent the possibility of incomplete delivery (missing parts) or transportation damage, please perform the following
checks upon receipt of the machine:
a)
b)
c)
d)
Before accepting the machine, please verify every single component in the consignment. Check for any damage.
In the event that the machine has been damaged, do not remove the damaged material. A set of photographs
are helpful in ascertaining responsibility.
Immediately report the extent of the damage to the transportation company and request that they inspect the
machine.
Immediately report the extent of the damage to the manufacturer representative, so that arrangements can be
made for the required repairs. In no case must the damage be repaired before the machine has been inspected
by the representative of the transportation company.
Purpose of this manual
The purpose of this manual is to allow the installer and the qualified operator to carry out all required operations in order
to ensure proper installation and maintenance of the machine, without any risk to people, animals and/or objects.
This manual is an important supporting document for qualified personnel but it is not intended to replace such personnel.
All activities must be carried out in compliance with local laws and regulations.
Important information on the refrigerant used
This product contains fluorate gases which have a greenhouse effect and which are covered by the Kyoto protocol. Do
not release such gases into the atmosphere.
Type of refrigerant: R134A
(1)
GWP value = 1300
The quantity of refrigerant used is indicated on the identity plate with the name of the unit.
Routine inspections may be necessary pursuant to local and/or European laws, to check on possible refrigerant leakage.
For more detailed information, contact your local dealer.
(1) GWP=Global warming potential
D–EIMWC00404-14EN - 7/86
NOMENCLATURE
EWW
Machine type
EWA = Air-cooled chiller, cooling only
EWY = Air-cooled chiller, heat pump
EWL = Remote condenser water chiller
ERA = Air-cooled condensing unit
EWW = Water cooled packaged water chiller
EWC = Air-cooled chiller, cooling only with centrifugal fan
EWT = Air-cooled chiller, cooling only with heat recovery
Refrigerant
D: R-134a
P: R-407C
Q: R-410A
Capacity class in kW (cooling)
Always 3-digit code
Idem as previous
Model series
Letter A, B,…: major modification
Inverter
= Non inverter
Z
= Inverter
Efficiency Level
S
= Standard efficiency
X
= High efficiency
P
= Premium efficiency (N.A. for this range)
Sound Level
S
= Standard noise
L
= Low noise
R
= Reduced noise
X
= Extra low noise
C
= Cabinet
(N.A. for this range)
(N.A. for this range)
(N.A. for this range)
(N.A. for this range)
Warranty
0
= 1 year of warranty
B
= 2 years of warranty
C = 3 years of warranty
…
= … years of warranty
Sequential number
000 = Base model
001 = First order this model (1 or more units)
002 = Second order this model (1 or more units)
… = … order this model
B01 = First order for this model + 1 year warranty
B02 = Second order for this model + 1 or more units
… = … order for this model
D–EIMWC00404-14EN - 8/86
D
340
I
-
S
S
0
001
Technical Specifications
Technical data – EWWD I-SS
TECHNICAL SPECIFICATIONS
EWWD I-SS
Capacity
Cooling
kW
Type
Capacity control
Minimum capacity
%
Unit power input
Cooling
kW
EER
ESEER
Colour
Casing
Material
Height
mm
Dimensions
Unit
Width
mm
Depth
mm
Unit
kg
Weight
Operating Weight
kg
Type
Water volume
l
Water heat
Nominal
water
Cooling
l/s
exchanger
flow rate
Evaporator
Nominal
Water
Cooling
kPa
pressure drop
Insulation material
Type
Number of condensers
No.
Water volume
l
Water heat
exchanger
Condenser
Nominal
flow rate
water
Cooling
Nominal
Water
Cooling
pressure drop
Compressor
Sound level
Refrigerant circuit
Piping connections
Safety devices
Notes
Insulation Material
Type
Oil charge
Quantity
Sound Power
Cooling
Sound Pressure
Cooling
Refrigerant type
Refrigerant charge
340
333
25
71.5
4.66
5.06
1821
1430
3398
2150
2380
193
400
394
460
460
stepless
25
25
86.8
101
4.59
4.56
4.96
4.93
Ivory White (Munsell code 5Y7.5/1)
Galvanized and painyedsteel sheet
1821
1821
1430
1430
3398
3398
2160
2179
2396
2410
Shell and tube
193
183
550
538
25
120
4.47
4.86
1821
1430
3398
2224
2457
172
15.90
18.81
21.97
25.71
37
50
54
62
1
37
Closed cell foam elastomer
Shell and Tube
1
1
43
48
1
61
l/s
19.32
22.91
26.79
31.46
kPa
26
28
30
26
l
dBA
dBA
16
1
93.7
75.2
kg
54
Closed cell foam elastomer
Screw compressor
16
16
1
1
96.6
96.7
76.2
78.2
R134a
52
52
16
1
96.7
78.2
52
N. of circuits
1
1
1
1
Evaporator water inlet/outlet
mm
168.3
168.3
168.3
168.3
Condenser water inlet/outlet
in
5"
5"
5"
5"
High pressure (pressure switch)
Low pressure (pressure switch)
Emergency stop
High discharge temperature on the compressor
Phase monitor
Low pressure ratio
High oil pressure drop
Low oil pressure
Cooling capacity, unit power input in cooling and EER are based on the following conditions:
evaporator 12°/ 7°C; condenser 30°/ 35°C.
D–EIMWC00404-14EN - 9/86
TECHNICAL SPECIFICATIONS
EWWD I-SS
Capacity
Cooling
kW
Type
Capacity control
Minimum capacity
%
Unit power input
Cooling
kW
EER
ESEER
Colour
Casing
Material
Height
mm
Dimensions
Unit
Width
mm
Depth
mm
Unit
kg
Weight
Operating Weight
kg
Type
Water volume
l
Water heat
Nominal
water
Cooling
l/s
exchanger
flow rate
Evaporator
Nominal
Water
Cooling
kPa
pressure drop
Insulation material
Type
Number of condensers
No.
Water volume
l
Water heat
Nominal
water
exchanger
Cooling
l/s
flow rate
Condenser
Nominal
Water
Cooling
kPa
pressure drop
Insulation Material
Type
Compressor
Oil charge
l
Quantity
Sound Power
Cooling
dBA
Sound level
Sound Pressure
Cooling
dBA
Refrigerant type
Refrigerant circuit
Piping connections
Safety devices
Notes
Refrigerant charge
kg
650
640
12.5
141
4.53
5.54
2113
1350
4361
3909
4217
271
700
705
800
782
stepless
12.5
12.5
156
171
4.52
4.57
5.75
5.56
Ivory White (Munsell code 5Y7.5/1)
Galvanized and painyedsteel sheet
2113
2113
1350
1350
4361
4361
3927
3945
4228
4243
Shell and tube
263
256
850
844
12.5
186
4.55
5.70
2113
1350
4361
3971
4262
248
30.58
33.66
37.37
40.34
55
44
58
53
2
74
Closed cell foam elastomer
Shell and Tube
2
2
80
86
2
93
37.33
41.11
45.56
49.21
25
25
28
28
16 + 16
2
96.9
77.8
108
Closed cell foam elastomer
Screw compressor
16 + 16
16 + 16
2
2
97.3
97.8
78.2
78.7
R134a
106
104
16 + 16
2
98.9
79.8
104
N. of circuits
2
2
2
2
Evaporator water inlet/outlet
mm
168.3
168.3
168.3
168.3
Condenser water inlet/outlet
in
5"
5"
5"
5"
High pressure (pressure switch)
Low pressure (pressure switch)
Emergency stop
High discharge temperature on the compressor
Phase monitor
Low pressure ratio
High oil pressure drop
Low oil pressure
Cooling capacity, unit power input in cooling and EER are based on the following conditions:
evaporator 12°C/7°C; condenser 30/ 35°C.
D–EIMWC00404-14EN - 10/86
TECHNICAL SPECIFICATIONS
EWWD I-SS
Capacity
Cooling
kW
Type
Capacity control
Minimum capacity
%
Unit power input
Cooling
kW
EER
ESEER
Colour
Casing
Material
Height
mm
Dimensions
Unit
Width
mm
Depth
mm
Unit
kg
Weight
Operating Weight
kg
Type
Water volume
l
Water heat
Nominal
water
Cooling
l/s
exchanger
flow rate
Evaporator
Nominal
Water
Cooling
kPa
pressure drop
Insulation material
Type
Number of condensers
No.
Water volume
l
Water heat
Nominal
water
exchanger
Cooling
l/s
flow rate
Condenser
Nominal
Water
Cooling
kPa
pressure drop
Insulation Material
Type
Compressor
Oil charge
l
Quantity
Sound Power
Cooling
dBA
Sound level
Sound Pressure
Cooling
dBA
Refrigerant type
Refrigerant circuit
Piping connections
Safety devices
Notes
Refrigerant charge
kg
900
910
12.5
200
4.55
5.47
2113
1350
4361
3996
4288
241
950
986
C10
1027
stepless
12.5
12.5
218
237
4.51
4.33
5.61
5.36
Ivory White (Munsell code 5Y7.5/1)
Galvanized and painyedsteel sheet
2113
2113
1350
1350
4361
4361
4080
4092
4369
4386
Shell and tube
233
233
C12
1155
8.3
254
4.54
5.51
2323
2135
4426
6079
6628
504
43.49
47.12
49.06
55.20
53
66
51
52
2
100
Closed cell foam elastomer
Shell and Tube
2
2
117
122
3
135
53.04
57.56
60.38
67.35
26
23
24
24
16 + 16
2
99.8
80.7
104
Closed cell foam elastomer
Screw compressor
16 + 16
16 + 16
2
2
99.8
99.8
80.7
80.7
R134a
104
104
16+16+16
3
100.4
80.4
156
N. of circuits
2
2
2
3
Evaporator water inlet/outlet
mm
168.3
168.3
168.3
219.1
Condenser water inlet/outlet
in
5”
5”
5”
5”
High pressure (pressure switch)
Low pressure (pressure switch)
Emergency stop
High discharge temperature on the compressor
Phase monitor
Low pressure ratio
High oil pressure drop
Low oil pressure
Cooling capacity, unit power input in cooling and EER are based on the following conditions:
evaporator 12°/ 7°C; condenser 30°/ 35°C.
D–EIMWC00404-14EN - 11/86
TECHNICAL SPECIFICATIONS
EWWD I-SS
Capacity
Cooling
kW
Type
Capacity control
Minimum capacity
%
Unit power input
Cooling
kW
EER
ESEER
Colour
Casing
Material
Height
mm
Dimensions
Unit
Width
mm
Depth
mm
Unit
kg
Weight
Operating Weight
kg
Type
Water volume
l
Water heat
Nominal
water
Cooling
l/s
exchanger
flow rate
Evaporator
Nominal
Water
Cooling
kPa
pressure drop
Insulation material
Type
Number of condensers
No.
Water volume
l
Water heat
Nominal
water
exchanger
Cooling
l/s
flow rate
Condenser
Nominal
Water
Cooling
kPa
pressure drop
Insulation Material
Type
Compressor
Oil charge
l
Quantity
Sound Power
Cooling
dBA
Sound level
Sound Pressure
Cooling
dBA
Refrigerant type
Refrigerant circuit
Piping connections
Safety devices
Notes
Refrigerant charge
kg
C13
1204
C14
C15
1274
1346
Stepless
8.3
8.3
8.3
268
282
298
4.50
4.51
4.51
5.56
5.56
5.54
Ivory White (Munsell code 5Y7.5/1)
Galvanized and painyedsteel sheet
2323
2323
2323
2135
2135
2135
4426
4426
4426
6097
6136
6174
6646
6670
6699
Shell and tube
472
504
489
57.53
60.87
64.32
56
47
58
3
143
Closed cell foam elastomer
Shell and Tube
3
151
3
159
70.32
74.36
78.57
24
25
24
Closed cell foam elastomer
Screw compressor
16+16+16
16+16+16
16+16+16
3
3
3
100.8
101.2
103.0
80.8
81.2
83.0
R134a
156
156
156
N. of circuits
3
3
3
Evaporator water inlet/outlet
mm
219.1
219.1
219.1
Condenser water inlet/outlet
in
5”
5”
5”
High pressure (pressure switch)
Low pressure (pressure switch)
Emergency stop
High discharge temperature on the compressor
Phase monitor
Low pressure ratio
High oil pressure drop
Low oil pressure
Cooling capacity, unit power input in cooling and EER are based on the following conditions:
evaporator 12°/ 7°C; condenser 30°/ 35°C.
D–EIMWC00404-14EN - 12/86
TECHNICAL SPECIFICATIONS
EWWD I-SS
Capacity
Cooling
kW
Type
Capacity control
Minimum capacity
%
Unit power input
Cooling
kW
EER
ESEER
Colour
Casing
Material
Height
mm
Dimensions
Unit
Width
mm
Depth
mm
Unit
kg
Weight
Operating Weight
kg
Type
Water volume
l
Water heat
Nominal water
Cooling
l/s
exchanger
flow rate
Evaporator
Nominal Water
Cooling
kPa
pressure drop
Insulation material
Type
Number of condensers
No.
Water volume
l
Water heat
Nominal water
exchanger
Cooling
l/s
flow rate
Condenser
Nominal Water
Cooling
kPa
pressure drop
Insulation Material
Type
Compressor
Oil charge
l
Quantity
Sound Power
Cooling
dBA
Sound level
Sound Pressure Cooling
dBA
Refrigerant type
Refrigerant circuit
Piping connections
Safety devices
Notes
Refrigerant charge
kg
C16
1401
C18
1510
472
C17
1455
stepless
8.3
335
4.35
5.45
Ivory White (Munsell code 5Y7.5/1)
Galvanized and painyedsteel sheet
2323
2135
4426
6210
6735
Shell and tube
472
66.93
69.54
72.15
62
66
71
3
167
Closed cell foam elastomer
Shell and Tube
3
174
3
183
82.05
85.53
89.01
24
24
23
8.3
317
4.43
5.55
2323
2135
4426
6192
6717
16+16+16
3
103.0
83.0
156
Closed cell foam elastomer
Screw compressor
16+16+16
3
103.0
83.0
R134a
156
8.3
353
4.28
5.27
2323
2135
4426
6228
6761
472
16+16+16
3
103.0
83.0
156
N. of circuits
3
3
3
Evaporator water inlet/outlet mm
219.1
219.1
219.1
Condenser water inlet/outlet
in
5"
5"
5"
High pressure (pressure switch)
Low pressure (pressure switch)
Emergency stop
High discharge temperature on the compressor
Phase monitor
Low pressure ratio
High oil pressure drop
Low oil pressure
Cooling capacity, unit power input in cooling and EER are based on the following conditions:
evaporator 12°/ 7°C; condenser 30°/ 35°C.
D–EIMWC00404-14EN - 13/86
Technical data – EWWD I-XS
TECHNICAL SPECIFICATIONS
EWWD I-XS
Capacity
Cooling
kW
Type
Capacity control
Minimum capacity
%
Unit power input
Cooling
kW
EER
ESEER
Colour
Casing
Material
Height
mm
Dimensions
Unit
Width
mm
Depth
mm
Unit
kg
Weight
Operating Weight
kg
Type
Water volume
l
Water heat
Nominal water
Cooling
l/s
exchanger
flow rate
Evaporator
Nominal Water
Cooling kPa
pressure drop
Insulation material
Type
Number of condensers
No.
Water volume
Water heat
exchanger
Condenser
Nominal
flow rate
water
Cooling
Nominal Water
Cooling
pressure drop
Compressor
Sound level
Refrigerant circuit
Piping connections
Safety devices
Notes
Insulation Material
Type
Oil charge
Quantity
Sound Power
Cooling
Sound Pressure Cooling
Refrigerant type
Refrigerant charge
360
362
25
70.7
5.12
5.34
1883
1430
4081
2594
2998
326
440
433
500
506
stepless
25
25
85.3
100
5.08
5.06
5.27
5.22
Ivory White (Munsell code 5Y7.5/1)
Galvanized and painyedsteel sheet
1883
1883
1430
1430
4081
4081
2667
2704
3078
3116
Shell and tube
317
308
600
573
25
120
4.76
5.11
1883
1430
4081
2704
3116
308
17.28
20.69
24.19
27.38
64
48
54
68
1
Closed cell foam elastomer
Shell and Tube
1
1
1
l
79
94
105
105
l/s
20.65
24.77
28.97
33.13
kPa
48
47
51
66
l
dBA
dBA
16
1
93.7
75.2
kg
54
Closed cell foam elastomer
Screw compressor
16
16
1
1
96.6
96.7
76.2
78.2
R134a
52
52
16
1
96.7
78.2
52
N. of circuits
1
1
1
1
Evaporator water
mm
168.3
168.3
168.3
168.3
inlet/outlet
Condenser water
in
5"
5"
5"
5"
inlet/outlet
High pressure (pressure switch)
Low pressure (pressure switch)
Emergency stop
High discharge temperature on the compressor
Phase monitor
Low pressure ratio
High oil pressure drop
Low oil pressure
Cooling capacity, unit power input in cooling and EER are based on the following conditions:
evaporator 12°/ 7°C; condenser 30°/ 35°C.
D–EIMWC00404-14EN - 14/86
TECHNICAL SPECIFICATIONS
EWWD I-XS
Capacity
Cooling
kW
Type
Capacity control
Minimum capacity
%
Unit power input
Cooling
kW
EER
ESEER
Colour
Casing
Material
Height
mm
Dimensions
Unit
Width
mm
Depth
mm
Unit
kg
Weight
Operating Weight
kg
Type
Water volume
l
Water heat
Nominal
water
Cooling
l/s
exchanger
flow rate
Evaporator
Nominal
Water
Cooling kPa
pressure drop
Insulation material
Type
Number of condensers
No.
Water volume
l
Water heat
Nominal
water
Cooling
l/s
exchanger
flow rate
Condenser
Nominal
Water
Cooling kPa
pressure drop
Compressor
Sound level
Refrigerant circuit
Piping connections
Safety devices
Notes
Insulation Material
Type
Oil charge
Quantity
Sound Power
Cooling
Sound Pressure
Cooling
Refrigerant type
Refrigerant charge
l
750
720
12.5
142
5.08
6.13
2245
1350
4769
4964
5582
539
20.58
20.58
48
2
157
800
795
850
866
Stepless
12.5
12.5
156
171
5.10
5.08
6.31
6.01
Ivory White (Munsell code 5Y7.5/1)
Galvanized and painyedsteel sheet
2245
2245
1350
1350
4769
4769
4997
5049
5615
5671
Shell and tube
539
528
20.44
24.75
24.98
24.75
48
47
Closed cell foam elastomer
Shell and Tube
2
2
173
188
950
933
12.5
185
5.05
6.14
2245
1350
4769
5073
5695
528
23.31
28.48
50
2
199
20.58
20.58
20.44
24.98
24.75
24.75
23.31
28.48
48
48
47
50
dBA
dBA
16 + 16
2
96.9
77.8
kg
108
Closed cell foam elastomer
Screw compressor
16 + 16
16 + 16
2
2
97.3
97.8
78.2
78.7
R134a
106
104
16 + 16
2
98.9
79.8
104
N. of circuits
2
2
2
2
Evaporator water inlet/outlet mm
219.1
219.1
219.1
219.1
Condenser water inlet/outlet
in
5"
5"
5"
5"
High pressure (pressure switch)
Low pressure (pressure switch)
Emergency stop
High discharge temperature on the compressor
Phase monitor
Low pressure ratio
High oil pressure drop
Low oil pressure
Cooling capacity, unit power input in cooling and EER are based on the following conditions:
evaporator 12°C/7°C; condenser 30/ 35°C.
D–EIMWC00404-14EN - 15/86
TECHNICAL SPECIFICATIONS
Capacity
Cooling
Type
Capacity control
Minimum capacity
Unit power input
Cooling
EER
ESEER
Colour
Casing
Material
Dimensions
Weight
Water heat exchanger
Evaporator
Water heat exchanger
Condenser
Compressor
Sound level
Refrigerant circuit
Piping connections
Safety devices
Notes
Unit
EWWD I-XS
kW
%
kW
Height
Width
Depth
Unit
Operating Weight
Type
Water volume
Nominal water flow
Cooling
rate
Nominal
Water
Cooling
pressure drop
Insulation material
Type
Number of condensers
Water volume
mm
mm
mm
kg
kg
l
C10
976
C11
C12
1038
1134
stepless
12.5
12.5
12.5
220
199
240
4.90
4.72
4.73
5.90
6.05
5.67
Ivory White (Munsell code 5Y7.5/1)
Galvanized and painyedsteel sheet
2245
2245
2245
1350
1350
1350
4769
4769
4769
5097
5132
5132
5729
5741
5741
Shell and tube
528
504
504
l/s
46.63
49.59
54.16
kPa
72
46
52
No.
l
Closed cell foam elastomer
Shell and Tube
2
2
2
209
209
209
Nominal water flow
Cooling
rate
l/s
28.07
28.07
27.10
33.12
32.82
32.82
Nominal
Water
Cooling
pressure drop
kPa
50
65
65
Insulation Material
Type
Oil charge
Quantity
Sound Power
Sound Pressure
Refrigerant type
Refrigerant charge
l
Cooling
Cooling
dBA
dBA
kg
Closed cell foam elastomer
Screw compressor
16 + 16
16 + 16
16 + 16
2
2
2
99.8
99.8
99.8
80.7
80.7
80.7
R134a
104
104
104
N. of circuits
2
2
2
Evaporator water inlet/outlet
mm
219.1
219.1
219.1
Condenser water inlet/outlet
in
5”
5”
5”
High pressure (pressure switch)
Low pressure (pressure switch)
Emergency stop
High discharge temperature on the compressor
Phase monitor
Low pressure ratio
High oil pressure drop
Low oil pressure
Cooling capacity, unit power input in cooling and EER are based on the following conditions:
evaporator 12°/ 7°C; condenser 30°/ 35°C.
D–EIMWC00404-14EN - 16/86
Technical data – EWLD I-SS
TECHNICAL SPECIFICATIONS
EWLD I-SS
Capacity
Cooling
kW
Type
Capacity control
Minimum capacity
%
Unit power input
Cooling
kW
EER
Colour
Casing
Material
Height
mm
Dimensions
Unit
Width
mm
Depth
mm
Unit
kg
Weight
Operating Weight
kg
Type
Water volume
l
Water heat
Nominal water
Cooling
l/s
exchanger
flow rate
Evaporator
Nominal Water
Cooling
kPa
pressure drop
Insulation material
Type
Compressor
Oil charge
l
Quantity
Sound Power
Cooling
dBA
Sound level
Sound Pressure Cooling
dBA
Refrigerant type
Refrigerant circuit
Piping connections
Liquid connection
Gas discharge
connection
Liquid Receiver
(Optional)
Safety devices
Notes
Refrigerant charge
(1)
320
328
25
83.8
3.91
1899
1464
3114
1861
2054
193
400
391
420
428
stepless
25
25
100
116
3.90
3.70
Ivory White (Munsell code 5Y7.5/1)
Galvanized and painyedsteel sheet
1899
1899
1464
1464
3114
3114
1861
1869
2054
2052
Shell and tube
193
183
500
504
25
137
3.67
1899
1464
3114
1884
2056
172
15.65
18.66
20.46
24.09
34
47
47
54
16
1
93.7
75.2
Closed cell foam elastomer
Screw compressor
16
16
1
1
96.6
96.7
76.2
78.2
R134a
16
1
96.7
78.2
kg
-
-
-
-
N. of circuits
Evaporator water inlet/outlet
Inlet
mm
mm
1
168.3
42
1
168.3
42
1
168.3
42
1
168.3
42
Outlet
mm
88.9
88.9
88.9
88.9
Volume
l
170
High pressure (pressure switch)
Low pressure (pressure switch)
Emergency stop
High discharge temperature on the compressor
Phase monitor
Low pressure ratio
High oil pressure drop
Low oil pressure
Cooling capacity and power input are based on: 12°/ 7°C entering/leaving evaporator water
temperature; 45°C saturated discharge temperature at the compressor
(1) EWLD version units are pre-charged with Nitrogen at 2 bar. Refrigerant charge must be
defined by plant designer only
D–EIMWC00404-14EN - 17/86
TECHNICAL SPECIFICATIONS
EWLD I-SS
Capacity
Cooling
kW
Type
Capacity control
Minimum capacity
%
Unit power input
Cooling
kW
EER
Colour
Casing
Material
Height
mm
Dimensions
Unit
Width
mm
Depth
mm
Unit
kg
Weight
Operating Weight
kg
Type
Water volume
l
Water heat
Nominal water
Cooling
l/s
exchanger
flow rate
Evaporator
Nominal Water
Cooling
kPa
pressure drop
Insulation material
Type
Compressor
Oil charge
l
Quantity
Sound Power
Cooling
dBA
Sound level
Sound Pressure Cooling
dBA
Refrigerant type
Refrigerant circuit
Piping connections
Liquid connection
Gas discharge
connection
Liquid Receiver
(Optional)
Safety devices
Notes
Refrigerant charge
(1)
600
596
12.5
165
3.61
2325
1464
4391
3331
3602
271
650
657
750
730
stepless
12.5
12.5
181
198
3.63
3.69
Ivory White (Munsell code 5Y7.5/1)
Galvanized and painyedsteel sheet
2325
2325
1464
1464
4391
4391
3339
3347
3602
3603
Shell and tube
263
256
800
788
12.5
214
3.67
2325
1464
4391
3356
3604
248
28.49
31.40
34.88
37.64
49
39
52
47
16 + 16
2
96.9
77.8
Closed cell foam elastomer
Screw compressor
16 + 16
16 + 16
2
97.3
97.8
78.2
78.7
R134a
16 + 16
2
98.9
79.8
kg
-
-
-
-
N. of circuits
Evaporator water inlet/outlet
Inlet
mm
mm
2
168.3
42
2
168.3
42
2
168.3
42
2
168.3
42
Outlet
mm
88.9
88.9
88.9
88.9
Volume
l
170
High pressure (pressure switch)
Low pressure (pressure switch)
Emergency stop
High discharge temperature on the compressor
Phase monitor
Low pressure ratio
High oil pressure drop
Low oil pressure
Cooling capacity and power input are based on: 12°/ 7°C entering/leaving evaporator water
temperature; 45°C saturated discharge temperature at the compressor
(1) EWLD version units are pre-charged with Nitrogen at 2 bar. Refrigerant charge must be
defined by plant designer only
D–EIMWC00404-14EN - 18/86
TECHNICAL SPECIFICATIONS
EWLD I-SS
Capacity
Cooling
kW
Type
Capacity control
Minimum capacity
%
Unit power input
Cooling
kW
EER
Colour
Casing
Material
Height
mm
Dimensions
Unit
Width
mm
Depth
mm
Unit
kg
Weight
Operating Weight
kg
Type
Water volume
l
Water heat
Nominal water
Cooling
l/s
exchanger
flow rate
Evaporator
Nominal Water
Cooling
kPa
pressure drop
Insulation material
Type
Compressor
Oil charge
l
Quantity
Sound Power
Cooling
dBA
Sound level
Sound Pressure Cooling
dBA
Refrigerant type
Refrigerant circuit
Piping connections
Liquid connections
Gas discharge
connections
Liquid Receiver
(Optional)
Safety devices
Notes
Refrigerant charge
(1)
850
850
12.5
231
3.67
2325
1464
4391
3364
3605
241
900
919
950
966
stepless
12.5
12.5
252
271
3.65
3.56
Ivory White (Munsell code 5Y7.5/1)
Galvanized and painyedsteel sheet
2325
2325
1464
1464
4391
4391
3412
3412
3645
3645
Shell and tube
233
233
C10
1033
8.3
279
3.59
2415
2135
4426
5146
5667
521
40.61
46.14
46.14
47.91
47
45
45
52
16 + 16
2
99.8
80.7
Closed cell foam elastomer
Screw compressor
16 + 16
16 + 16
2
2
99.8
99.8
80.7
80.7
R134a
16+16+16
3
100.1
80.1
kg
-
-
-
-
N. of circuits
Evaporator water inlet/outlet
Inlet
mm
mm
2
168.3
42
2
168.3
42
2
168.3
42
3
219.1
42
Outlet
mm
88.9
88.9
88.9
88.9
Volume
l
170
High pressure (pressure switch)
Low pressure (pressure switch)
Emergency stop
High discharge temperature on the compressor
Phase monitor
Low pressure ratio
High oil pressure drop
Low oil pressure
Cooling capacity and power input are based on: 12°/ 7°C entering/leaving evaporator water
temperature; 45°C saturated discharge temperature at the compressor
(1) EWLD version units are pre-charged with Nitrogen at 2 bar. Refrigerant charge must be defined by
plant designer only
D–EIMWC00404-14EN - 19/86
TECHNICAL SPECIFICATIONS
EWLD I-SS
Capacity
Cooling
kW
Type
Capacity control
Minimum capacity
%
Unit power input
Cooling
kW
EER
Colour
Casing
Material
Height
mm
Dimensions
Unit
Width
mm
Depth
mm
Unit
kg
Weight
Operating Weight
kg
Type
Water volume
l
Water heat
Nominal water
Cooling
l/s
exchanger
flow rate
Evaporator
Nominal Water
Cooling
kPa
pressure drop
Insulation material
Type
Compressor
Oil charge
l
Quantity
Sound Power
Cooling
dBA
Sound level
Sound Pressure Cooling
dBA
Refrigerant type
Refrigerant circuit
Piping connections
Liquid connections
Gas discharge
connections
Liquid Receiver
(Optional)
Safety devices
Notes
Refrigerant charge
(1)
C11
1078
8.3
296
3.64
2415
2135
4426
5167
5671
504
C12
1125
C13
1188
stepless
8.3
8.3
312
329
3.60
3.61
Ivory White (Munsell code 5Y7.5/1)
Galvanized and painyedsteel sheet
2415
2415
2135
2135
4426
4426
5167
5188
5671
5677
Shell and tube
504
489
C14
1267
8.3
347
3.65
2415
2135
4426
5208
5680
472
51.51
53.73
56.78
60.53
46
49
41
51
16+16+16
3
100.4
80.4
Closed cell foam elastomer
Screw compressor
16+16+16
16+16+16
3
3
100.8
101.2
80.8
81.2
R134a
16+16+16
3
103.0
83.0
kg
-
-
-
-
N. of circuits
Evaporator water inlet/outlet
Inlet
mm
mm
3
219.1
42
3
219.1
42
3
219.1
42
3
219.1
42
Outlet
mm
88.9
88.9
88.9
88.9
Volume
l
170
High pressure (pressure switch)
Low pressure (pressure switch)
Emergency stop
High discharge temperature on the compressor
Phase monitor
Low pressure ratio
High oil pressure drop
Low oil pressure
Cooling capacity and power input are based on: 12°/ 7°C entering/leaving evaporator water
temperature; 45°C saturated discharge temperature at the compressor
(1) EWLD version units are pre-charged with Nitrogen at 2 bar. Refrigerant charge must be defined by
plant designer only
D–EIMWC00404-14EN - 20/86
TECHNICAL SPECIFICATIONS
Capacity
Cooling
Type
Capacity control
Minimum capacity
Unit power input
Cooling
EER
Colour
Casing
Material
Dimensions
Weight
Water heat exchanger
Evaporator
Compressor
Sound level
Refrigerant circuit
Piping connections
Liquid connections
Gas discharge conn.
Liquid Receiver
(Optional)
Safety devices
Notes
EWLD I-SS
kW
%
kW
Height
Width
Depth
Unit
Unit
Operating Weight
Type
Water volume
Nominal water flow
rate
Nominal
Water
pressure drop
Insulation material
Type
Oil charge
Quantity
Sound Power
Sound Pressure
Refrigerant type
Refrigerant charge
mm
mm
mm
kg
kg
l
Cooling
l/s
Cooling
kPa
l
Cooling
Cooling
(1)
N. of circuits
Evaporator water inlet/outlet
Inlet
Outlet
Volume
dBA
dBA
C15
1319
C16
C17
1370
1422
stepless
8.3
8.3
8.3
366
386
405
3.60
3.55
3.51
Ivory White (Munsell code 5Y7.5/1)
Galvanized and painyedsteel sheet
2415
2415
2415
2135
2135
2135
4426
4426
4426
5208
5208
5208
5680
5680
5680
Shell and tube
472
472
472
63.00
65.48
67.96
55
59
63
Closed cell foam elastomer
Screw compressor
16+16+16
16+16+16
16+16+16
3
3
3
103.0
103.0
103.0
83.0
83.0
83.0
R134a
kg
-
-
-
mm
mm
mm
3
219.1
42
88.9
3
219.1
42
88.9
3
219.1
42
88.9
l
170
High pressure (pressure switch)
Low pressure (pressure switch)
Emergency stop
High discharge temperature on the compressor
Phase monitor
Low pressure ratio
High oil pressure drop
Low oil pressure
Cooling capacity and power input are based on: 12°/ 7°C entering/leaving evaporator water
temperature; 45°C saturated discharge temperature at the compressor
(1) EWLD version units are pre-charged with Nitrogen at 2 bar. Refrigerant charge must be defined
by plant designer only
D–EIMWC00404-14EN - 21/86
Sound pressure levels
EWWD I-SS - EWWD I-XS - EWLD I-SS
EWWD
I-SS
340
400
460
550
650
700
800
850
900
950
C10
C12
C13
C14
C15
C16
C17
C18
-5
Power
dB(A)
93.7
96.6
96.7
96.7
96.9
97.3
97.8
98.9
99.8
99.8
99.8
100.4
100.8
101.2
103.0
103.0
103.0
103.0
-5
Power
dB(A)
93.7
96.6
96.7
96.7
96.9
97.3
97.8
98.9
99.8
99.8
99.8
-5
Power
dB(A)
93.7
96.6
96.7
96.7
96.9
97.3
97.8
98.9
99.8
99.8
99.8
100.1
100.4
100.8
101.2
103.0
103.0
103.0
103.0
Sound pressure level at 1 m from the unit in semispheric free field (rif. 2 x 10 Pa)
63 Hz
125 Hz
250 Hz
500 Hz 1000 Hz 2000 Hz 4000 Hz 8000 Hz
dB(A)
75.2
53.6
56.2
71.1
74.5
69.7
65.6
63.9
59.5
76.2
54.6
57.2
72.1
75.5
70.7
66.6
64.9
60.5
78.2
56.6
59.2
74.1
77.5
72.7
68.6
66.9
62.5
78.2
56.6
59.2
74.1
77.5
72.7
68.6
66.9
62.5
77.8
56.2
58.8
73.7
77.1
72.3
68.2
66.5
62.1
78.2
56.6
59.2
74.1
77.5
72.7
68.6
66.9
62.5
78.7
57.1
59.7
74.6
78.0
73.2
69.1
67.4
63.0
79.8
58.2
60.8
75.7
79.1
74.3
70.2
68.5
64.1
80.7
59.1
61.7
76.6
80.0
75.2
71.1
69.4
65.0
80.7
59.1
61.7
76.6
80.0
75.2
71.1
69.4
65.0
80.7
59.1
61.7
76.6
80.0
75.2
71.1
69.4
65.0
80.4
58.8
61.4
76.3
79.7
74.9
70.8
69.1
64.7
80.8
59.2
61.8
76.7
80.1
75.3
71.2
69.5
65.1
81.2
59.6
62.2
77.1
80.5
75.7
71.6
69.9
65.5
83.0
61.4
64.0
78.9
82.3
77.5
73.4
71.7
67.3
83.0
61.4
64.0
78.9
82.3
77.5
73.4
71.7
67.3
83.0
61.4
64.0
78.9
82.3
77.5
73.4
71.7
67.3
83.0
61.4
64.0
78.9
82.3
77.5
73.4
71.7
67.3
Note: The values are according to ISO 3744 and are referred to: evaporator 12/7°C, condenser 30/35° C, full load operation
EWWD
I-XS
360
440
500
600
750
800
850
950
C10
C11
C12
Sound pressure level at 1 m from the unit in semispheric free field (rif. 2 x 10 Pa)
63 Hz
125 Hz
250 Hz
500 Hz 1000 Hz 2000 Hz 4000 Hz 8000 Hz
dB(A)
75.2
53.6
56.2
71.1
74.5
69.7
65.6
63.9
59.5
76.2
54.6
57.2
72.1
75.5
70.7
66.6
64.9
60.5
78.2
56.6
59.2
74.1
77.5
72.7
68.6
66.9
62.5
78.2
56.6
59.2
74.1
77.5
72.7
68.6
66.9
62.5
77.8
56.2
58.8
73.7
77.1
72.3
68.2
66.5
62.1
78.2
56.6
59.2
74.1
77.5
72.7
68.6
66.9
62.5
78.7
57.1
59.7
74.6
78.0
73.2
69.1
67.4
63.0
79.8
58.2
60.8
75.7
79.1
74.3
70.2
68.5
64.1
80.7
59.1
61.7
76.6
80.0
75.2
71.1
69.4
65.0
80.7
59.1
61.7
76.6
80.0
75.2
71.1
69.4
65.0
80.7
59.1
61.7
76.6
80.0
75.2
71.1
69.4
65.0
Note: The values are according to ISO 3744 and are referred to: evaporator 12/7°C, condenser 30/35° C, full load operation
EWLD
I-SS
320
400
420
500
600
650
750
800
850
900
950
C10
C11
C12
C13
C14
C15
C16
C17
Sound pressure level at 1 m from the unit in semispheric free field (rif. 2 x 10 Pa)
63 Hz
125 Hz
250 Hz
500 Hz 1000 Hz 2000 Hz 4000 Hz 8000 Hz
dB(A)
75.2
53.6
56.2
71.1
74.5
69.7
65.6
63.9
59.5
76.2
54.6
57.2
72.1
75.5
70.7
66.6
64.9
60.5
78.2
56.6
59.2
74.1
77.5
72.7
68.6
66.9
62.5
78.2
56.6
59.2
74.1
77.5
72.7
68.6
66.9
62.5
77.8
56.2
58.8
73.7
77.1
72.3
68.2
66.5
62.1
78.2
56.6
59.2
74.1
77.5
72.7
68.6
66.9
62.5
78.7
57.1
59.7
74.6
78.0
73.2
69.1
67.4
63.0
79.8
58.2
60.8
75.7
79.1
74.3
70.2
68.5
64.1
80.7
59.1
61.7
76.6
80.0
75.2
71.1
69.4
65.0
80.7
59.1
61.7
76.6
80.0
75.2
71.1
69.4
65.0
80.7
59.1
61.7
76.6
80.0
75.2
71.1
69.4
65.0
80.1
58.5
61.1
76.0
79.4
74.6
70.5
68.8
64.4
80.4
58.8
61.4
76.3
79.7
74.9
70.8
69.1
64.7
80.8
59.2
61.8
76.7
80.1
75.3
71.2
69.5
65.1
81.2
59.6
62.2
77.1
80.5
75.7
71.6
69.9
65.5
83.0
61.4
64.0
78.9
82.3
77.5
73.4
71.7
67.3
83.0
61.4
64.0
78.9
82.3
77.5
73.4
71.7
67.3
83.0
61.4
64.0
78.9
82.3
77.5
73.4
71.7
67.3
83.0
61.4
64.0
78.9
82.3
77.5
73.4
71.7
67.3
Note: The values are according to ISO 3744 and are referred to: evaporator 12/7°C, 40°C saturated discharge temperature at the compressor
(condenserless)
D–EIMWC00404-14EN - 22/86
EWWD I-SS - EWWD I-XS - EWLD I-SS
with sound proof cabinet
EWWD
I-SS
340
400
460
550
650
700
800
850
900
950
C10
C12
C13
C14
C15
C16
C17
C18
-5
Power
dB(A)
83.7
86.6
86.7
86.7
86.9
87.3
87.8
88.9
89.8
89.8
89.8
90.4
90.8
91.2
93.0
93.0
93.0
93.0
-5
Power
dB(A)
83.7
86.6
86.7
86.7
86.9
87.3
87.8
88.9
89.8
89.8
89.8
-5
Power
dB(A)
83.7
86.6
86.7
86.7
86.9
87.3
87.8
88.9
89.8
89.8
89.8
90.1
90.4
90.8
91.2
93.0
93.0
93.0
93.0
Sound pressure level at 1 m from the unit in semispheric free field (rif. 2 x 10 Pa)
63 Hz
125 Hz
250 Hz
500 Hz 1000 Hz 2000 Hz 4000 Hz 8000 Hz
dB(A)
65.2
43.6
46.2
61.1
64.5
59.7
55.6
53.9
49.5
66.2
44.6
47.2
62.1
65.5
60.7
56.6
54.9
50.5
68.2
46.6
49.2
64.1
67.5
62.7
58.6
56.9
52.5
68.2
46.6
49.2
64.1
67.5
62.7
58.6
56.9
52.5
67.8
46.2
48.8
63.7
67.1
62.3
58.2
56.5
52.1
68.2
46.6
49.2
64.1
67.5
62.7
58.6
56.9
52.5
68.7
47.1
49.7
64.6
68.0
63.2
59.1
57.4
53.0
69.8
48.2
50.8
65.7
69.1
64.3
60.2
58.5
54.1
70.7
49.1
51.7
66.6
70.0
65.2
61.1
59.4
55.0
70.7
49.1
51.7
66.6
70.0
65.2
61.1
59.4
55.0
70.7
49.1
51.7
66.6
70.0
65.2
61.1
59.4
55.0
70.4
48.8
51.4
66.3
69.7
64.9
60.8
59.1
54.7
70.8
49.2
51.8
66.7
70.1
65.3
61.2
59.5
55.1
71.2
49.6
52.2
67.1
70.5
65.7
61.6
59.9
55.5
73.0
51.4
54.0
68.9
72.3
67.5
63.4
61.7
57.3
73.0
51.4
54.0
68.9
72.3
67.5
63.4
61.7
57.3
73.0
51.4
54.0
68.9
72.3
67.5
63.4
61.7
57.3
73.0
51.4
54
68.9
72.3
67.5
63.4
61.7
57.3
Note: The values are according to ISO 3744 and are referred to: evaporator 12/7°C, condenser 30/35° C, full load operation;
EWWD
I-XS
360
440
500
600
750
800
850
950
C10
C11
C12
Sound pressure level at 1 m from the unit in semispheric free field (rif. 2 x 10 Pa)
63 Hz
125 Hz
250 Hz
500 Hz 1000 Hz 2000 Hz 4000 Hz 8000 Hz
dB(A)
65.2
43.6
46.2
61.1
64.5
59.7
55.6
53.9
49.5
66.2
44.6
47.2
62.1
65.5
60.7
56.6
54.9
50.5
68.2
46.6
49.2
64.1
67.5
62.7
58.6
56.9
52.5
68.2
46.6
49.2
64.1
67.5
62.7
58.6
56.9
52.5
67.8
46.2
48.8
63.7
67.1
62.3
58.2
56.5
52.1
68.2
46.6
49.2
64.1
67.5
62.7
58.6
56.9
52.5
68.7
47.1
49.7
64.6
68.0
63.2
59.1
57.4
53.0
69.8
48.2
50.8
65.7
69.1
64.3
60.2
58.5
54.1
70.7
49.1
51.7
66.6
70.0
65.2
61.1
59.4
55.0
70.7
49.1
51.7
66.6
70.0
65.2
61.1
59.4
55.0
70.7
49.1
51.7
66.6
70.0
65.2
61.1
59.4
55.0
Note: The values are according to ISO 3744 and are referred to: evaporator 12/7°C, condenser 30/35° C, full load operation;
EWLD
SS
320
400
420
500
600
650
750
800
850
900
950
C10
C11
C12
C13
C14
C15
C16
C17
Sound pressure level at 1 m from the unit in semispheric free field (rif. 2 x 10 Pa)
63 Hz
125 Hz
250 Hz
500 Hz 1000 Hz 2000 Hz 4000 Hz 8000 Hz
dB(A)
65.2
43.6
46.2
61.1
64.5
59.7
55.6
53.9
49.5
66.2
44.6
47.2
62.1
65.5
60.7
56.6
54.9
50.5
68.2
46.6
49.2
64.1
67.5
62.7
58.6
56.9
52.5
68.2
46.6
49.2
64.1
67.5
62.7
58.6
56.9
52.5
67.8
46.2
48.8
63.7
67.1
62.3
58.2
56.5
52.1
68.2
46.6
49.2
64.1
67.5
62.7
58.6
56.9
52.5
68.7
47.1
49.7
64.6
68.0
63.2
59.1
57.4
53.0
69.8
48.2
50.8
65.7
69.1
64.3
60.2
58.5
54.1
70.7
49.1
51.7
66.6
70.0
65.2
61.1
59.4
55.0
70.7
49.1
51.7
66.6
70.0
65.2
61.1
59.4
55.0
70.7
49.1
51.7
66.6
70.0
65.2
61.1
59.4
55.0
70.1
48.5
51.1
66.0
69.4
64.6
60.5
58.8
54.4
70.4
48.8
51.4
66.3
69.7
64.9
60.8
59.1
54.7
70.8
49.2
51.8
66.7
70.1
65.3
61.2
59.5
55.1
71.2
49.6
52.2
67.1
70.5
65.7
61.6
59.9
55.5
73.0
51.4
54.0
68.9
72.3
67.5
63.4
61.7
57.3
73.0
51.4
54.0
68.9
72.3
67.5
63.4
61.7
57.3
73.0
51.4
54.0
68.9
72.3
67.5
63.4
61.7
57.3
73.0
51.4
54
68.9
72.3
67.5
63.4
61.7
57.3
Note: The values are according to ISO 3744 and are referred to: evaporator 12/7°C, 40°C saturated discharge temperature at the compressor
(condenserless).
D–EIMWC00404-14EN - 23/86
Sound pressure correction factors for different distances
EWWD I-SS
EWWD I-SS
340
400
460
550
650
700
800
850
900
950
C10
C12
C13
C14
C15
C16
C17
C18
1
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
5
-7.9
-7.9
-7.9
-7.9
-7.9
-7.5
-7.9
-7.5
-7.5
-7.9
-7.5
-7.5
-7.5
-7.5
-7.5
-7.5
-7.5
-7.5
Distance (m)
10
15
-12.7
-15.8
-12.7
-15.8
-12.7
-15.8
-12.7
-15.8
-12.7
-15.8
-12.2
-15.3
-12.7
-15.8
-12.2
-15.3
-12.2
-15.3
-12.7
-15.8
-12.2
-15.3
-12.2
-15.3
-12.2
-15.3
-12.2
-15.3
-12.2
-15.3
-12.2
-15.3
-12.2
-15.3
-12.2
-15.3
20
-18.1
-18.1
-18.1
-18.1
-18.1
-17.5
-18.1
-17.5
-17.5
-18.1
-17.5
-17.5
-17.5
-17.5
-17.5
-17.5
-17.5
-17.5
25
-19.8
-19.8
-19.8
-19.8
-19.8
-19.3
-19.8
-19.3
-19.3
-19.8
-19.3
-19.3
-19.3
-19.3
-19.3
-19.3
-19.3
-19.3
Note: The values are dB(A) (pressure level), in open field conditions on reflecting surface (directivity factor Q=2)
EWWD I-XS
EWWD I–XS
360
440
500
600
750
800
850
950
C10
C11
C12
1
0
0
0
0
0
0
0
0
0
0
0
5
-7.9
-7.9
-7.9
-7.9
-7.9
-7.5
-7.9
-7.5
-7.5
-7.9
-7.5
Distance (m)
10
15
-12.7
-15.8
-12.7
-15.8
-12.7
-15.8
-12.7
-15.8
-12.7
-15.8
-12.2
-15.3
-12.7
-15.8
-12.2
-15.3
-12.2
-15.3
-12.7
-15.8
-12.2
-15.3
20
-18.1
-18.1
-18.1
-18.1
-18.1
-17.5
-18.1
-17.5
-17.5
-18.1
-17.5
Note: The values are dB(A) (pressure level), in open field conditions on reflecting surface (directivity factor Q=2)
D–EIMWC00404-14EN - 24/86
25
-19.8
-19.8
-19.8
-19.8
-19.8
-19.3
-19.8
-19.3
-19.3
-19.8
-19.3
Operating limits
Storage
The units can be stored under the following environmental conditions:
Minimum ambient temperature
:
-20°C
Maximum ambient temperature
:
53°C
Maximum relative humidity
:
95% non-condensing
ATTENTION
Storage at a lower temperature than the minimum indicated can cause damage to certain parts including the
electronic control unit and its LCD display.
ATTENTION
Storage at a higher temperature than that indicated will cause the safety valves on the suction valves of the
compressors to open.
ATTENTION
Storage in a condensed atmosphere can damage the electronic components.
Storage at ambient temperature near or below 0°C, with water loops filled with water require to protect against water
freezing. See anti-freeze protection in Mechanical installation paragraph.
Operation
The unit must operate within the limits indicated in the following diagram.
ATTENTION
Operating outside the limits indicated may trigger the protection devices and interrupt functioning of the unit and, in
extreme cases, may damage the unit.
For any doubts, consult the manufacturer.
The operating limits refer to a fully load operating unit. For partial load operation limits please contact the factory
D–EIMWC00404-14EN - 25/86
Envelope
EWWD I-SS – EWWD I-XS
D–EIMWC00404-14EN - 26/86
Envelope
ELWD I-SS
D–EIMWC00404-14EN - 27/86
Mechanical Installation
Shipping
The stability of the machine during shipping must be ensured. If the machine is shipped with a wooden cross-plank on its
base, the cross-plank must be removed only after the final destination has been reached.
Responsibility
The manufacturer declines all responsibility, present and future, for any damage to persons, animals or property caused
by negligence of operators failing to follow the installation and maintenance instructions in this manual.
All safety equipment must be regularly and periodically checked in accordance with this manual and with local laws and
regulations regarding safety and environment protection.
Safety
The machine must be firmly secured to the ground.
It is essential to observe the following instructions:
- The machine can only be lifted using the lifting points on the base of the machine itself. These are the only points that
can support the entire weight of the unit.
- Do not allow unauthorised and/or unqualified personnel to access the machine.
- It is forbidden to access the electrical components without having opened the machine's general disconnecting switch
and switched off the power supply.
- It is forbidden to access the electrical components without using an insulating platform. Do not access the electrical
components if water and/or moisture are present.
- All operations on the refrigerant circuit and on components under pressure must be carried out by qualified personnel
only.
- Replacement of a compressor or addition of lubricating oil must be carried out by qualified personnel only.
- Sharp edges can cause wounds. Avoid direct contact.
- Avoid introducing solid bodies into the water pipes while the machine is connected to the system.
- A mechanical filter must be installed on the water pipe connected to the heat exchanger inlet.
- The machine is supplied with safety valves, that are installed on both the high and the low pressure sides of the
refrigerant circuit.
In case of sudden stop of the unit, follow the instructions on the Control Panel Operating Manual which is part of the
on-board documentation delivered to the end user with this manual.
It is recommended to perform installation and maintenance with other people. In case of accidental injury or unease, it is
necessary to:
- keep calm
- press the alarm button if present in the installation site
- move the injured person in a warm place far from the unit and in rest position
- contact immediately emergency rescue personnel of the building or if the Health Emergency Service
- wait without leaving the injured person alone until the rescue operators come
- give all necessary information to the the rescue operators
WARNING
Before carrying out any operation on the machine, please read this instruction and operating manual carefully.
Installation and maintenance must be carried out only by qualified personnel that is familiar with the provisions of law
and local regulations and has been trained properly or has experience with this type of equipment.
C
WARNING
Avoid installing the machine in a place that could be dangerous during maintenance operations, such as (but not
only) platforms without parapets or railings or areas not complying with the clearance requirements.
Handling and lifting
Avoid bumping and/or jolting during unloading from the lorry and moving the machine. Do not push or pull the machine
from any part other than the base frame. Secure the machine inside the lorry to prevent it from moving and causing
damage to the panels and to the base frame. Do not allow any part of the machine to fall during transportation and/or
unloading, as this could cause serious damage.
All units of the series are supplied with four lifting points. Only these points may be used for lifting the unit, as shown in
figure 2.
D–EIMWC00404-14EN - 28/86
Fig. 1 - Lifting the unit
WARNING
Both the lifting ropes and the spacing bar and/or scales must be strong enough to support the machine safely.
Please check the unit’s weight on the machine’s nameplate.
The weights shown in the "Technical data" tables in the "General Information" chapter refer to standard units.
Some specific machines might have accessories that increase their overall weight (heat recovery, etc.)
WARNING
The machine must be lifted with the utmost attention and care. Avoid jolting when lifting and lift the machine very
slowly, keeping it perfectly level.
Positioning and assembly
All units are designed for installation indoors. The machine must be installed on a robust and perfectly level foundation;
should the machine be installed on balconies or roofs, it might be necessary to use weight distribution beams.
For installation on the ground, prepare a strong cement base that is at least 250 mm wider and longer than the machine.
Also, this base must be strong enough to support the weight of the machine as stated in the technical specifications.
If the machine is installed in places that are easily accessible to people and animals, it is advisable to install protection
gratings for the compressor section.
To ensure the best possible performance on the installation site, the following precautions and instructions must be
followed:
D–EIMWC00404-14EN - 29/86

Make sure to provide a strong and solid foundation to reduce noise and vibration as much as possible.The water in
the system must be particularly clean and all traces of oil or rust must be removed. A mechanical water filter must be
installed on the machine’s inlet piping.
Minimum space requirements
Every side of the machine must be accessible for all post-installation maintenance activities. Figure 2 shows the
minimum space necessary.
Fig. 2 – Lifting the unit
Ventilation
The temperature of the room where the unit is placed should be always maintained between 0°C and 40°C.
Sound protection
When sound levels require special control, great care must be exercised to isolate the machine from its base by
appropriately applying anti-vibration elements (supplied as an option). Flexible joints must be installed on the water
connections, as well.
Water piping
Piping must be designed with the lowest number of elbows and the lowest number of vertical changes of direction. In this
way, installation costs are reduced considerably and system performance is improved.
The water system must have:
1. Anti-vibration mountings in order to reduce transmission of vibrations to the underlying structure.
2. Isolating valves to isolate the machine from the water system during service.
3. Manual or automatic air venting device at the system’s highest point; drain device at the system’s lowest point.
Neither the evaporator nor the heat recovery device must be positioned at the system’s highest point.
4. A suitable device that can maintain the water system under pressure (expansion tank, etc.)
5. Water temperature and pressure indicators on the machine to assist the operator during service and
maintenance.
6. A filter or device which can remove debris from the water before it enters the pump (in order to prevent
cavitation, please consult the pump manufacturer for the recommended type of filter ). The use of a filter
prolongs the life of the pump and helps keep the water system in a better condition.
7. Another filter must be installed on the machine inlet water pipe, near the evaporator and heat recovery (if
installed). The filter prevents solid particles from entering the heat exchanger, as they could damage it or
reduce its heat exchanging capacity.
8. If the machine is intended to replace of another, the entire water system must be emptied and cleaned before
the new unit is installed. Regular tests and proper chemical treatment of water are recommended before
starting up the new machine.
9. In the event that glycol is added to the water system as anti-freeze protection, pay attention to the fact that
suction pressure will be lower, the machine’s performance will be lower and water pressure drops will be greater.
All machine-protection systems, such as anti-freeze, and low-pressure protection will need to be readjusted.
10. No system is installed on the unit to prevent water freezing in case the ambient temperature goes down below
0°C (thermal insulation is not enough to assure freezing prevent). Machine and water pipes must be protected
against freezing
Before insulating water piping, check that there are no leaks.
D–EIMWC00404-14EN - 30/86
Fig. 3 - Minimum clearance requirements for machine maintenance
Fig. 4 - Water piping connection for condenser and heat recovery
D–EIMWC00404-14EN - 31/86
ATTENTION
Install a mechanical filter on the inlet to each heat exchanger. Failure to install a mechanical filter allows solid
particles and/or welding slag to enter the exchanger. Installation of a filter with a mesh size not exceeding 0.5 – 1
mm in diameter is advised.
The manufacturer cannot be held responsible for any damage to exchangers ensuing from the lack of a mechanical
filter.
Water treatment
Before putting the machine into operation, clean the water circuit. Dirt, scaling, corrosion residue and other foreign
material can accumulate inside the heat exchanger and reduce its heat exchanging capacity. Pressure drops can
increase as well, thus reducing water flow. Proper water treatment therefore reduces the risk of corrosion, erosion,
scaling, etc. The most appropriate water treatment must be determined locally, according to the type of system and local
characteristics of the process water.
The manufacturer is not responsible for damage to or malfunctioning of equipment caused by failure to treat water or by
improperly treated water.
Table 1 - Acceptable water quality limits
PH (25°C)
Electricity conductivity S/cm (25°C)
Chloride ion (mg Cl / l)
2 Sulphate ion (mg SO 4 / l)
Alkalinity (mg CaCO3 / l)
6.88.0
800
200
200
100
Total hardness (mg CaCO3 / l)
Iron (mg Fe / l)
2Sulphide ion (mg S / l)
+
Ammonium ion (mg NH4 / l)
Silica (mg SiO2 / l)
 200
 1.0
None
 1.0
 50
Evaporator and exchangers anti-freeze protection
Two or more of below protection methods should be considered when designing the system as a whole:
1. Continuous water flow circulation inside piping and exchangers.
2. Addition of an appropriate amount of glycol inside the water circuit.
3. Additional heat insulation and heating of exposed piping.
4. Emptying and cleaning of the heat exchanger during the winter season.
It is the responsibility of the installer and/or local maintenance personnel to ensure that two or more of the described antifreeze methods are used. Make sure that appropriate anti-freeze protection is maintained at all times. Failure to follow
the instructions above could result in damage to some of the machine’s components. Damage caused by freezing is not
covered by the warranty.
Installing the flow switch
To ensure sufficient water flow through the evaporator, it is essential that a flow switch be installed on the water circuit.
The flow switch can be installed either on the inlet or outlet water piping. The purpose of the flow switch is to stop the
machine in the event of interrupted water flow, thus protecting the evaporator from freezing.
A flow switch specifically gauged for this purpose, with identification code 131035072, is available as an option.
This paddle-type flow switch is suitable for heavy-duty outdoor applications (IP67) for pipe diameters in the range of 1" to
6".
The flow switch is provided with a clean contact which must be electrically connected to the terminals of the terminal
board (check the machine’s wiring diagram for further information).
For further information regarding device installation and settings, please read the instruction leaflet in the device box.
D–EIMWC00404-14EN - 32/86
3”
4”
5”
6”
83 mm
107 mm
134 mm
162 mm
5 mm
For 3” - 6” piping
Use paddle b = 29 mm
Adjusting the flow
trigger sensitivity
switch’s
Fig. 5 - Adjusting the safety flow switch
Refrigerating circuit safety valves
Each system comes with safety valves that are installed on each circuit, both on the evaporator and on the condenser.
The purpose of the valves is to release the refrigerant inside the refrigerant circuit in the event of certain malfunctions.
WARNING
The unit is designed for indoor installation.
Damage may be caused by inhaling the refrigerant gas. Avoid the release of the refrigerant into the atmosphere.
The safety valves must be connected to the outdoor environment. The installer is responsible for connecting the
safety valves to the drainage pipes and for their correct dimensioning.
Check for adequate air circulation around the machine.
D–EIMWC00404-14EN - 33/86
Pressure drops
Evaporator
Pressure drop (kPa)
EWWD340~C18 I-SS
EWLD320~C17 I-SS
Water flow (l/s)
A
EWWD340 I-SS
EWLD320 I-SS
M
B
EWWD400 I-SS
EWLD400 I-SS
N
EWWDC10 I-SS
--
EWLDC10 I-SS
C
EWWD460 I-SS
EWLD420 I-SS
O
EWWDC12 I-SS
EWLDC11 I-SS
D
EWWD550 I-SS
EWLD500 I-SS
P
EWWDC13 I-SS
EWLDC12 I-SS
E
EWWD650 I-SS
EWLD600 I-SS
Q
EWWDC14 I-SS
EWLDC13 I-SS
F
EWWD700 I-SS
EWLD650 I-SS
R
EWWDC15 I-SS
EWLDC14 I-SS
G
EWWD800 I-SS
EWLD750 I-SS
S
EWWDC16 I-SS
EWLDC15 I-SS
H
EWWD850 I-SS
EWLD800 I-SS
T
EWWDC17 I-SS
EWLDC16 I-SS
I
EWWD900 I-SS
EWLD850 I-SS
U
EWWDC18 I-SS
EWLDC17 I-SS
L
EWWD950 I-SS
EWLD900 I-SS
D–EIMWC00404-14EN - 34/86
EWLD950 I-SS
Condenser (1 pass 4-8°C)
Pressure drop (kPa)
EWWD340~C18 I-SS
Water flow (l/s)
A
EWWD340 I-SS
L
EWWD950 I-SS
B
EWWD400 I-SS
M
EWWDC10 I-SS
C
EWWD460 I-SS
O
EWWDC12 I-SS
D
EWWD550 I-SS
P
EWWDC13 I-SS
E
EWWD650 I-SS
Q
EWWDC14 I-SS
F
EWWD700 I-SS
R
EWWDC15 I-SS
G
EWWD800 I-SS
S
EWWDC16 I-SS
H
EWWD850 I-SS
T
EWWDC17 I-SS
I
EWWD900 I-SS
U
EWWDC18 I-SS
D–EIMWC00404-14EN - 35/86
Condenser (2 passes 9-15°C)
Pressure drop (kPa)
EWWD340~C18 I-SS
Water flow (l/s)
A
EWWD340 I-SS
L
EWWD950 I-SS
B
EWWD400 I-SS
M
EWWDC10 I-SS
C
EWWD460 I-SS
O
EWWDC12 I-SS
D
EWWD550 I-SS
P
EWWDC13 I-SS
E
EWWD650 I-SS
Q
EWWDC14 I-SS
F
EWWD700 I-SS
R
EWWDC15 I-SS
G
EWWD800 I-SS
S
EWWDC16 I-SS
H
EWWD850 I-SS
T
EWWDC17 I-SS
I
EWWD900 I-SS
U
EWWDC18 I-SS
D–EIMWC00404-14EN - 36/86
Evaporator
Pressure drop (kPa)
EWWD360~C12 I-XS
Water flow (l/s)
A
EWWD360 I-XS
B
EWWD440 I-XS
C
EWWD500 I-XS
D
EWWD600 I-XS
E
EWWD750 I-XS
F
EWWD800 I-XS
G
EWWD850 I-XS
H
EWWD950 I-XS
I
EWWDC10 I-XS
L
EWWDC11 I-XS
M
EWWDC12 I-XS
D–EIMWC00404-14EN - 37/86
Condenser (2 passes 4-8°C)
Pressure drop (kPa)
EWWD360~C12 I-XS
Water flow (l/s)
A
EWWD360 I-XS
B
EWWD440 I-XS
C
EWWD500 I-XS
D
EWWD600 I-XS
E
EWWD750 I-XS
F
EWWD800 I-XS
G
EWWD850 I-XS
H
EWWD950 I-XS
I
EWWDC10 I-XS
L
EWWDC11 I-XS
M
EWWDC12 I-XS
D–EIMWC00404-14EN - 38/86
Total heat recovery (option on request)
Pressure drops
Condenser (1 pass 4-8°C)
Pressure drop (kPa)
EWWD340~C18 I-SS
Water flow (l/s)
A
EWWD340 I-SS
L
EWWD950 I-SS
B
EWWD400 I-SS
M
EWWDC10 I-SS
C
EWWD460 I-SS
O
EWWDC12 I-SS
D
EWWD550 I-SS
P
EWWDC13 I-SS
E
EWWD650 I-SS
Q
EWWDC14 I-SS
F
EWWD700 I-SS
R
EWWDC15 I-SS
G
EWWD800 I-SS
S
EWWDC16 I-SS
H
EWWD850 I-SS
T
EWWDC17 I-SS
I
EWWD900 I-SS
U
EWWDC18 I-SS
D–EIMWC00404-14EN - 39/86
Condenser (2 passes 9-15°C)
Pressure drop (kPa)
EWWD340~C18 I-SS
Water flow (l/s)
A
EWWD340 I-SS
L
EWWD950 I-SS
B
EWWD400 I-SS
M
EWWDC10 I-SS
C
EWWD460 I-SS
O
EWWDC12 I-SS
D
EWWD550 I-SS
P
EWWDC13 I-SS
E
EWWD650 I-SS
Q
EWWDC14 I-SS
F
EWWD700 I-SS
R
EWWDC15 I-SS
G
EWWD800 I-SS
S
EWWDC16 I-SS
H
EWWD850 I-SS
T
EWWDC17 I-SS
I
EWWD900 I-SS
U
EWWDC18 I-SS
D–EIMWC00404-14EN - 40/86
Partial Heat recovery (option on request)
Pressure drops
Pressure drop (kPa)
EWWD340~C18 I-SS
Water flow (l/s)
A
EWWD340 I-SS
L
EWWD950 I-SS
B
EWWD400 I-SS
M
EWWDC10 I-SS
C
EWWD460 I-SS
O
EWWDC12 I-SS
D
EWWD550 I-SS
P
EWWDC13 I-SS
E
EWWD650 I-SS
Q
EWWDC14 I-SS
F
EWWD700 I-SS
R
EWWDC15 I-SS
G
EWWD800 I-SS
S
EWWDC16 I-SS
H
EWWD850 I-SS
T
EWWDC17 I-SS
I
EWWD900 I-SS
U
EWWDC18 I-SS
D–EIMWC00404-14EN - 41/86
Electrical Installation
General specifications
CAUTION
All electrical connections to the machine must be carried out in compliance with applicable laws and regulations.
All installation, operating and maintenance activities must be carried out by qualified personnel.
Please refer to the specific wiring diagram for the machine that you have purchased and which was sent with the unit.
Should the wiring diagram not appear on the machine or should it have been lost, please contact your dealer who will
provide for a copy to be forwarded.
CAUTION
Use copper conductors only. Use of conductors in any material other than copper could cause overheating or
corrosion at the connection points and damage the unit.
To avoid interference, all control wires must be installed separately from the power cables. Use separate electrical
conduits for this purpose.
CAUTION
Before servicing the machine in any way, open the main disconnecting switch on the machine’s main power supply.
When the machine is off but the disconnector switch is in the closed position, unused circuits are live, as well.
CAUTION
Concurrence of single-phase and three-phase charges and unbalance between phases can cause leakages towards
ground of up to 150 mA during the normal operation of the units of the series.
If the unit includes devices that cause superior harmonics (such as VFD and phase cut), the leakage towards ground
could increase to very high values (about 2 Ampere).
The protections for the power supply system must be designed in accordance with the above mentioned values.
The area where unit is installed has to be restricted accessible by authorized personnel only.
D–EIMWC00404-14EN - 42/86
Electrical data
EWWD
I-SS
Maximum
Current for
wires
sizing
Maximum
Starting
Current
(a)
Power
factor at
nominal
conditions
Main
Switch
Short
Circuit
Current
Maximum
Compressor
Current
Circuit 1
Maximum
Compressor
Current
Circuit 2
Maximum
Compressor
Current
Circuit 3
Compressor
Inrush
Current
Circuit 1
Compressor
Inrush
Current
Circuit 2
Compressor
Inrush
Current
Circuit 3
Compressor
Fuse Circuit
1
Compressor
Fuse Circuit
2
Compressor
Fuse Circuit
3
Control
Transformer
Control
Circuit
Breaker
340
400
460
550
650
700
800
850
900
950
C10
C12
C13
C14
C15
C16
C17
C18
224
256
298
328
448
480
512
554
597
627
657
768
810
853
895
925
955
985
330
464
464
464
493
627
650
681
681
703
703
836
867
898
898
920
942
942
0.88
0.86
0.88
0.90
0.87
0.86
0.86
0.87
0.88
0.89
0.89
0.86
0.86
0.87
0.88
0.88
0.89
0.89
400 A
400 A
400 A
400 A
630 A
630 A
630 A
630 A
800 A
800 A
800 A
1000 A
1000 A
1000 A
1250 A
1250 A
1250 A
1250 A
25 kA
25 kA
25 kA
25 kA
25 kA
25 kA
25 kA
25 kA
25 kA
25 kA
25 kA
25 kA
25 kA
25 kA
25 kA
25 kA
25 kA
25 kA
204
233
271
299
204
204
233
233
271
271
299
233
233
233
271
271
271
299
204
233
233
271
271
299
299
233
233
271
271
271
299
299
233
271
271
271
299
299
299
330
464
464
464
330
330
464
464
464
464
464
464
464
464
464
464
464
464
330
464
464
464
464
464
464
464
464
464
464
464
464
464
464
464
464
464
464
464
464
250A gG
315A gG
315A gG
355A gG
250A gG
250A gG
315A gG
315A gG
315A gG
315A gG
355A gG
315A gG
315A gG
315A gG
315A gG
315A gG
315A gG
355A gG
250A gG
315A gG
315A gG
315A gG
315A gG
355A gG
355A gG
315A gG
315A gG
315A gG
315A gG
315A gG
355A gG
355A gG
315A gG
315A gG
315A gG
315A gG
355A gG
355A gG
355A gG
500 VA
500 VA
500 VA
500 VA
500 VA
500 VA
500 VA
500 VA
500 VA
500 VA
500 VA
1000 VA
1000 VA
1000 VA
1000 VA
1000 VA
1000 VA
1000 VA
4A
4A
4A
4A
4A
4A
4A
4A
4A
4A
4A
8A
8A
8A
8A
8A
8A
8A
EWWD
I-XS
Maximum
Current for
wires
sizing
Maximum
Starting
Current
(a)
Power
factor at
nominal
conditions
Main
Switch
Short
Circuit
Current
Maximum
Compressor
Current
Circuit 1
Maximum
Compressor
Current
Circuit 2
Maximum
Compressor
Current
Circuit 3
Compressor
Inrush
Current
Circuit 1
Compressor
Inrush
Current
Circuit 2
Compressor
Inrush
Current
Circuit 3
Compressor
Fuse Circuit
1
Compressor
Fuse Circuit
2
Compressor
Fuse Circuit
3
Control
Transformer
Control
Circuit
Breaker
360
440
500
600
750
800
850
950
C10
C11
C12
224
256
298
328
448
480
512
554
597
627
657
330
464
464
464
493
627
650
681
681
703
703
0.88
0.86
0.88
0.90
0.87
0.86
0.86
0.87
0.88
0.89
0.89
400 A
400 A
400 A
400 A
630 A
630 A
630 A
630 A
800 A
800 A
800 A
25 kA
25 kA
25 kA
25 kA
25 kA
25 kA
25 kA
25 kA
25 kA
25 kA
25 kA
204
233
271
299
204
204
233
233
271
271
299
204
204
233
271
271
299
299
-
330
464
464
464
330
330
464
464
464
464
464
330
464
464
464
464
464
464
464
250A gG
315A gG
315A gG
355A gG
250A gG
250A gG
315A gG
315A gG
315A gG
315A gG
355A gG
250A gG
315A gG
315A gG
315A gG
315A gG
355A gG
355A gG
-
500 VA
500 VA
500 VA
500 VA
500 VA
500 VA
500 VA
500 VA
500 VA
500 VA
500 VA
4A
4A
4A
4A
4A
4A
4A
4A
4A
4A
4A
EWLD
I-SS
Maximum
Current for
wires
sizing
320
400
420
500
600
650
750
800
850
900
950
C10
C11
C12
C13
C14
C15
C16
C17
224
256
298
328
448
480
512
554
597
627
657
737
768
810
853
895
925
955
985
Maximum
Starting
Current
(a)
330
464
464
464
493
627
650
681
681
703
703
836
836
867
898
898
920
942
942
D–EIMWC00404-14EN - 44/86
Power
factor at
nominal
conditions
Main
Switch
Short
Circuit
Current
0.88
0.86
0.88
0.90
0.87
0.86
0.86
0.87
0.88
0.89
0.89
0.86
0.86
0.86
0.87
0.88
0.88
0.89
0.89
400 A
400 A
400 A
400 A
630 A
630 A
630 A
630 A
800 A
800 A
800 A
1000 A
1000 A
1000 A
1000 A
1250 A
1250 A
1250 A
1250 A
25 kA
25 kA
25 kA
25 kA
25 kA
25 kA
25 kA
25 kA
25 kA
25 kA
25 kA
25 kA
25 kA
25 kA
25 kA
25 kA
25 kA
25 kA
25 kA
Maximum
Compressor
Current
Circuit 1
204
233
271
299
204
204
233
233
271
271
299
204
233
233
233
271
271
299
299
Maximum
Compressor
Current
Circuit 2
Maximum
Compressor
Current
Circuit 3
Compressor
Inrush
Current
Circuit 1
Compressor
Inrush
Current
Circuit 2
Compressor
Inrush
Current
Circuit 3
Compressor
Fuse Circuit
1
Compressor
Fuse Circuit
2
Compressor
Fuse Circuit
3
Control
Transformer
Control
Circuit
Breaker
204
233
233
271
271
299
299
233
233
233
271
271
271
299
299
233
233
271
271
271
299
299
299
330
464
464
464
330
330
464
464
464
464
464
303
464
464
464
464
464
464
464
330
464
464
464
464
464
464
464
464
464
464
464
464
464
464
464
464
464
464
464
464
464
464
250A gG
315A gG
315A gG
355A gG
250A gG
250A gG
315A gG
315A gG
315A gG
315A gG
355A gG
250A gG
315A gG
315A gG
315A gG
315A gG
315A gG
315A gG
355A gG
250A gG
315A gG
315A gG
315A gG
315A gG
355A gG
355A gG
315A gG
315A gG
315A gG
315A gG
315A gG
315A gG
355A gG
355A gG
315A gG
315A gG
315A gG
315A gG
315A gG
355A gG
355A gG
355A gG
500 VA
500 VA
500 VA
500 VA
500 VA
500 VA
500 VA
500 VA
500 VA
500 VA
500 VA
1000 VA
1000 VA
1000 VA
1000 VA
1000 VA
1000 VA
1000 VA
1000 VA
4A
4A
4A
4A
4A
4A
4A
4A
4A
4A
4A
8A
8A
8A
8A
8A
8A
8A
8A
Electrical components
All power and interface electrical connections are specified in the wiring diagram that is shipped with the machine.
The installer must supply the following components:
Power supply wires (dedicated conduit)
Interconnection and interface wires (dedicated conduit)
Thermal-magnetic circuit breaker of suitable size (please see electrical data).
Electrical wiring
Power circuit:
Connect the electrical power supply cables to the terminals of the general circuit breaker on the machine’s
terminal board. The access panel must have a hole of appropriate diameter for the cable used and its cable
gland. A flexible conduit can also be used, containing the three power phases plus earth.
In any case, absolute protection against any water penetrating through the connection point must be ensured.
Control circuit:
Every machine of the series is supplied with an auxiliary 400/115V control circuit transformer. No additional
cable for the control system power supply is thus required.
Only if the optional separate accumulation tank is requested, the electrical anti-freeze resistance must have a
separate power supply.
Oil Heaters
Each circuit has an electrical resistance installed in the compressor, whose purpose is to keep the oil warm thus
preventing the presence of liquid refrigerant mixed with the oil in the compressor. Obviously, the operation of the
electrical resistance is guaranteed only if there is a constant power supply. If it is not possible to keep the machine
powered when inactive during winter, apply at least two of the procedures described in the “Mechanical Installation”
section under the “Anti-freeze protection of evaporator and exchangers”.
If the plant uses pumps outside the machine (not supplied with the unit), the power line of each pump must be provided
with a magnetothermic switch and a control switch.
Water pump control
Connect the control contactor coil power supply to terminals 27 and 28 (pump #1) and 401 and 402 (pump 2) located on
terminal board M3, and install the contactor on a power supply having the same voltage as the pump contactor coil. The
terminals are connected to a clean microprocessor contact.
The microprocessor contact has the following commutation capacity:
Maximum voltage:
Maximum current:
Reference standard:
250 Vac
2 A Resistive - 2 A Inductive
EN 60730-1
The wiring described above allows the microprocessor to manage the water pump automatically. It is good practice to
install a clean status contact pump’s thermal-magnetic circuit breaker and to connect it in series with the flow switch.
Alarm relays – Electrical wiring
The machine has a clean-contact digital output that changes state whenever an alarm occurs in one of the refrigerant
circuits. Connect this signal to an external visual, sound alarm or to the BMS in order to monitor its operation. See the
machine’s wiring diagram for wiring.
Unit On/Off remote control – Electrical wiring
The machine has a digital input that allows remote control. A startup timer, a circuit breaker or a BMS can be connected
to this input. Once the contact has been closed, the microprocessor launches the startup sequence by first turning on the
water pump and then the compressors. When the contact is opened the microprocessor launches the machine shutdown
sequence. The contact must be clean.
Double Setpoint – Electrical wiring
The Double Setpoint function allows to change over the unit setpoint between two predefined values in the unit controller.
An example of an application is ice production during the night and standard operation during the day. Connect a circuit
breaker or timer between terminals 5 and 21 of terminal board M3. The contact must be clean.
External water Setpoint reset – Electrical wiring (Optional)
The machine’s local setpoint can be modified by means of an external analogue 4-20 mA signal. Once this function has
been enabled, the microprocessor allows to modify the setpoint from the set local value up to a differential of 3°C. 4 mA
corresponds to a 0°C differential, 20 mA corresponds to the setpoint plus the maximum differential.
The signal cable must be directly connected to terminals 35 and 36 of the M3 terminal board.
The signal cable must be of the shielded type and must not be laid in the vicinity of the power cables, so as not to induce
interference with the electronic controller.
Unit limitation – Electrical wiring (Optional)
The machine’s microprocessor allows to limit the capacity by means of two separate criteria:
>Load limitation: The load can be varied by means of a 4-20 mA external signal from a BMS.
The signal cable must be directly connected to terminals 36 and 37 of the M3 terminal board.
The signal cable must be of the shielded type and must not be laid in the vicinity of the power cables, so as not
to induce interference with the electronic controller.
Current limitation: The machine’s load can be varied by means of a 4-20 mA external signal from an external
device. In this case, current control limits must be set on the microprocessor so that the microprocessor
transmits the value of the measured current and limits it.
The signal cable must be directly connected to terminals 36 and 37 of the M3 terminal board.
The signal cable must be of the shielded type and must not be laid in the vicinity of the power cables, so as not
to induce interference with the electronic controller.
A digital input allows to enable the current limitation at the desired time. Connect the enabling switch or the
timer (clean contact) to terminals 5 and 9.
Attention: the two options cannot be enabled simultaneously. Setting one function excludes the other.
Fig. 6 - User connection to the interface terminal board
LEGEND
1S
2S
Al
AO
C-3W
C.L.
CFS
CLE
CP-VFD
D.L.
DI
Compressor Status 1
Compressor Status 2
Analog Inputs
Analog Output
Condenser 3-Way Valve
Current Limit
Condensator Flow Switch
Current Limit Enable
Condenser Pump VFD
Demand Limit
Digital Inputs
DO
DPS
EF
EFS
EFS-1
EFS-2
GA
KPC
KPE-1
KPE-2
Digital Outputs
Double Set Point
Esternal Fault
Evaporator Flow Switch
Evaporator Flow Switch 1
Evaporator Flow Switch 2
General Alarm
Condensator Water Pump
Evaporator Water Pump 1
Evaporator Water Pump 2
D–EIMWC00404-14EN - 46/86
PS
Q10
S.O.
TW1
TW2
TW3
TW4
Power Supply
Main Switch
Setpoint Override
Tower 1 Fan Step
Tower 2 Fan Step
Tower 3 Fan Step
Tower 4 Fan Step
Guidelines for remote condenser application
Design of remote condenser application, and, in particular, sizing of piping and piping path, is a responsibility of plant
designer. This paragraph is only focused to give suggestion to plant designer, this suggestions have to be weighted with
references to application peculiarities.
For remote condenser application, such as air-cooled or evaporative condensers, the chillers are shipped with holding
R134a charge. It is important that the unit be kept tightly closed until the remote condenser is installed and piped to the
unit.
Chillers are supplied with filter drier, moisture indicator and expansion valve factory mounted as standard.
It is the contractor’s responsibility to install the interconnection piping, leak test it and the entire system, evacuate the
system and supply the refrigerant charge.
All piping must be conform to the applicable local and state codes.
Use refrigerant grade copper tubing only and isolate the refrigeration lines from building structures to prevent transfer of
vibration.
It is important that the discharge lines be looped at the condenser and trapped at the compressor to prevent refrigerant
and oil from draining into the compressors; looping the discharge line also provide greater flexibility.
Do not use a saw to remove end caps. This might allow copper chips to contaminate the system. Use a tube cutter or
heat to remove caps. When sweating copper joints it is important to flow dry nitrogen through the system prior to
charging with refrigerant. This prevents scale formation and the possible formation of an explosive mixture of HFC-134a
and air. This will also prevent the formation of toxic phosgene gas, which occurs when HFC-134a is exposed to open
flame.
Soft solders are not to be used. For copper-to-copper joints use a phos-copper solder with 6% to 8% silver content. A
high silver content brazing rod must be used for copper-to-brass or copper-to-steel joints. Only use oxy-acetylene
brazing.
After the equipment is correctly installed, leak tested and evacuated , it can be charged with R134a refrigerant and
started under the supervision of Daikin authorized technician.
Charge will be added until the liquid line sight glass is clear, with no bubbles flowing into the expansion valve. Total
refrigerant charge will depend on the used remote condenser and volume of refrigerant piping
Refrigerant piping design
The system can be configured in any of the main arrangements as shown in Figures 7, 8 and 9. The configuration and its
associated elevation, along with the total distance between the chiller and the air-cooled condenser are important factors
in determining the liquid line and discharge line sizes. This will also affect the field refrigerant charges. Consequently,
there are physical limits that must not be violated if the system is to operate as designed.
1.
2.
3.
The total distance between the chiller and the air-cooled condenser should not exceed 60 equivalent meters
Liquid line risers must not exceed 5 meters in height from the condenser liquid line connection.
Discharge line risers cannot exceed an elevation difference greater than 30 actual meters.
Fig. 7 - Condenser Located with No Elevation Difference
D–EIMWC00404-14EN - 47/86
Fig. 8 - Condenser Located above Chiller Unit
Fig. 9 - Condenser Located below Chiller Unit
Determining Equivalent Line Length
To determine the appropriate size for field installed liquid and discharge lines, it is first necessary to establish the
equivalent length of pipe for each line. The equivalent length is the actual friction loss from the linear run of pipe plus the
added friction loss of elbows, valves, etc. Table 2 shows the equivalent length of pipe for various nonferrous valves and
fittings. Follow these steps when calculating line size:
1.
2.
3.
Start with an initial approximation of equivalent length by assuming that the equivalent length of pipe is 1.5
times the actual pipe length.
Refer to Tables 2 and 3 for a first approximation of line size.
Check the line size by calculating the actual equivalent length.
D–EIMWC00404-14EN - 48/86
Note: When calculating the equivalent length, do not include piping of the chiller unit. Only field piping must be
considered.
Table 2 - Equivalent Lengths (in meters)
Line Size
OD (inches)
Angle
Valve
Short
Radius
EL
Long
Radius EL
1/4
3/8
1/2
5/8
3/4
7/8
1-1/8
1-3/8
1-5/8
2-1/8
2-5/8
3-1/8
5.8
7.3
7.3
7.6
7.6
8.5
8.8
10.1
10.4
11.9
13.4
14.3
0.8
1.2
1.4
1.7
2.0
2.4
0.8
1.0
1.2
1.6
2.0
2.4
0.6
0.9
1.0
1.2
1.4
1.6
0.6
0.7
0.8
1.0
1.3
1.6
Liquid Line Sizing
In designing liquid lines it is important that the liquid reaches the expansion valve without flash gas, since this gas will
reduce the valve capacity. Because flashing gas can be caused by pressure drop in the line, the pressure losses due to
friction and changes in static head should be kept at minimum.
A check valve must be installed in the liquid line where the ambient temperature can drop below the equipment room
temperature to prevent liquid migration to the condenser and to maintain liquid refrigerant in the line for unit startup (if
thermostatic expansion valve is used, the check valve also help to keep liquid pressure high enough to keep the valve
closed with compressor off).
A relief valve should be installed between the check valve and the expansion avlve.
The liquid line diameter should be as small as possible while maintaining acceptable pressure drop. This is necessary to
minimize refrigerant charge. The total length between the chiller unit and the air-cooled condenser must not exceed 60
equivalent meters.
Liquid line risers in the system will require an additional 11.5 kPa pressure drop per meter of vertical rise. When it is
necessary to have a liquid line riser, make the vertical run immediately after the condenser before any additional
restrictions. The liquid line risers must not exceed 3 meters in height from the condenser liquid line connection (see
Figure 22). The liquid line does not have to be pitched.
Liquid lines are not typically insulated. However, if the lines are exposed to solar heat gain or temperatures exceeding
43°C, sub-cooling may be effected. In these situations, insulate the liquid lines.
Reference for liquid line sizing is shown in Table 3. It has to be used for reference only, for circuit working with
condensing temperature equal to 55°C and 5°C subcooling at the condenser outlet. Line dimensioning is responsibility of
plant designer, use ASHRAE Refrigeration Handbook or other suitable design guide.
Table 3 - Liquid line sizes
Circuit
Capacity
kW
300
350
400
450
Total Equivalent Length (meters)
5
1-1/8
1-1/8
1-1/8
1-1/8
10
1-1/8
1-3/8
1-3/8
1-3/8
15
1-3/8
1-3/8
1-3/8
1-3/8
20
1-3/8
1-3/8
1-3/8
1-3/8
25
1-3/8
1-3/8
1-3/8
1-5/8
30
1-3/8
1-3/8
1-5/8
1-5/8
40
1-3/8
1-5/8
1-5/8
1-5/8
50
1-5/8
1-5/8
1-5/8
2-1/8
60
1-5/8
1-5/8
1-5/8
2-1/8
Discharge (Hot Gas) Line Sizing
Discharge line size is based on the velocity needed for proper chiller operation handling oil properly and protecting
compressor from damage that can result from condensing liquid refrigerant during shutdown.
D–EIMWC00404-14EN - 49/86
Total friction loss for discharge line from 20 to 40 kPa is considered good design. Carefully consideration must be given
for sizing each section of piping so that gas velocities are sufficient at all operating conditions to carry oil.
If the velocity in a vertical discharge riser is to low, considerable oil can collect in the riser and horizontal header, causing
compressor to lose oil and it can result in compressor damage due to lack of oil. When the compressor load (and the gas
velocity in the discharge line) increase the oil collected during reduced load can be carried out in a slug back to the
compressor causing damage.
Any discharge lines coming into and horizontal header should rise above the centerline of the header.
The discharge lines should pitch downward, in the direction of the hot gas flow, at the rate of 6 mm per meter of
horizontal run. This is necessary to move by gravity any oil lying in the header. Oil pockets should be avoided because
oil would collect at such points an the compressor can become starved.
If the chiller unit is below condenser, loop the discharge line to at least 2.5 cm above the top of the condenser. A
pressure tap valve should be installed at the condenser to facilitate measuring pressure for service.
A relief valve should be installed on the discharge line.
Reference for discharge line sizing is shown in Table 9. It has to be used for reference only, for circuit working with
evaporator leaving temperature equal to 7°C and condensing temperature equal to 55°C. Line dimensioning is
responsibility of plant designer, use ASHRAE Refrigeration Handbook or other suitable design guide.
Table 4 - Discharge line sizes
Circuit
Capacity
Total Equivalent Length (meters)
kW
5
10
15
20
25
30
40
50
60
300
2-1/8
2-1/8
2-1/8
2-5/8
2-5/8
2-5/8
3-1/8
3-1/8
3-1/8
350
2-1/8
2-1/8
2-5/8
2-5/8
3-1/8
3-1/8
3-1/8
3-1/8
3-1/8
400
2-1/8
2-5/8
2-5/8
3-1/8
3-1/8
3-1/8
3-1/8
2 x 2-5/8
2 x 2-5/8
450
2-5/8
2-5/8
2-5/8
3-1/8
3-1/8
3-1/8
2 x 2-5/8
2 x 2-5/8
2 x 3-1/8
Oil Charge
In remote condenser application the oil charge into the compressor has to take into account that a percentage of oil
around 1% is usually mixed into the refrigerant, so some oil has to be added to the standard charge if the refrigerant
charge exceed the standard charge of the unit. What is important, during the unit operation, is that the oil level in the oil
separator is not lower than the ¼ of the upper sideglass.
The compressor of the EWLD and Liquid Receiver version units are shipped with their proper charge of oil. The
refrigerant circuits mustn’t remain open to the air for more than 15 minutes. If this happens you need to replace the
oilcharge and the oil filter as described in the “Procedure to replace oil filter” of this manual.
D–EIMWC00404-14EN - 50/86
Operation
Operator’s responsibilities
It is important that the operator is appropriately trained and becomes familiar with the system before operating the
machine. In addition to reading this manual, the operator must study the microprocessor operating manual and the wiring
diagram in order to understand start-up sequence, operation, shutdown sequence and operation of all the safety devices.
During the machine’s initial start-up phase, a technician authorized by the manufacturer is available to answer any
questions and to give instructions as to the correct operating procedures.
The operator is advised to keep a record of operating data for every installed machine. Another record should also be
kept of all the periodical maintenance and servicing activities.
If the operator notes abnormal or unusual operating conditions, he is advised to consult the technical service authorized
by the manufacturer.
Description of the machine
This machine, of the water condensation type, is made up of the following main components:
- Compressor:
- Evaporator:
- Condenser:
- Expansion valve:
The single-screw compressor of the Fr 3200 or Fr4100 series is of the semi-hermetic
type and utilises gas from the evaporator to cool the motor and allow optimal operation
under any expected load conditions. The oil-injection lubrication system does not require
an oil pump as oil flow is ensured by the pressure difference between delivery and
suction. In addition to ensuring lubrication of ball bearings, oil injection dynamically seals
the screw, thus enabling the compression process.
The direct-expansion shell and tube type evaporator is of ample size in order to ensure
optimum efficiency under all load conditions.
The shell and tube type condenser has external high efficiency micro fins.
The liquid subcooled by the lower part of the tubes not only improves overall efficiency of
the machine but also compensates variations in heat load by adapting the refrigerant
load to all foreseen operating conditions.
The machine has a an electronic expansion valve, which is controlled by an electronic
device called a Driver that optimises its operation.
Description of the refrigeration cycle
The low-temperature refrigerant gas from the evaporator is drawn by the compressor through the electric motor, which is
cooled by the refrigerant. It is subsequently compressed and during this process the refrigerant mixes with the oil from
the oil separator.
The high-pressure oil-refrigerant mixture is introduced into the centrifuge-type high-efficiency oil separator, where the oil
is separated from the refrigerant. The oil accumulated on the bottom of the separator is forced by the pressure difference
back into the compressor while the oil-free refrigerant is sent to the condenser.
The refrigerant fluid is evenly distributed inside the condenser throughout the volume of the exchanger, and the gas in
contact with the tubes is cooled and successively starts to condense.
The condensed fluid at saturation temperature passes through the subcooling section where it looses even more heat,
increasing the efficiency of the cycle. The heat taken from the fluid during cooling, condensation and subcooling is
exchanged with that of the water passing inside the condenser tubes.
The subcooled fluid flows through the high-efficiency filter dryer and then reaches the expansion element (expansion
valve) through which a fall in pressure starts off the expansion process resulting in the vaporisation of part of the
refrigerant liquid.
The result at this point is a low-pressure and low-temperature liquid-gas mixture entering the evaporator, where it takes
the heat required for vaporisation.
When the refrigerant liquid-vapour is uniformly distributed in the direct expansion evaporator tubes, heat is exchanged
with the cooling water, thus reducing the temperature until complete evaporation, followed by superheating.
Once it has reached the superheated-vapour state, the refrigerant leaves the evaporator and is once again taken into the
compressor to repeat the cycle.
Description of the refrigeration cycle with partial heat recovery
The low-temperature refrigerant gas from the evaporator is drawn by the compressor through the electric motor, which is
cooled by the refrigerant. It is subsequently compressed and during this process the refrigerant mixes with the oil from
the oil separator.
The high-pressure oil-refrigerant mixture is introduced into the centrifuge-type high-efficiency oil separator, where the oil
is separated from the refrigerant. The oil accumulated on the bottom of the separator is forced by the pressure difference
back into the compressor while the oil-free refrigerant is sent to the condenser.
The upper portion of the condenser has cooling tubes through which about 10% of the heat rejection (mainly discharge
gas superheat) of the unit is recovered.
D–EIMWC00404-14EN - 51/86
These condensers, with partial heat recovery tubes, have crowns with special couplings by which they can be connected
to the hot water pipes. When partial recovery is activated, condenser performance is improved since the condenser
temperature is lowered further in as much as the surface dedicated to heat discharge is greater.
After passing through the cooling tubes, the gas starts to condense in the central part of the condenser.
The condensed fluid at saturation temperature passes through the subcooling section where it looses even more heat,
increasing the efficiency of the cycle. The subcooled fluid flows through the high-efficiency filter dryer and then reaches
the expansion element (expansion valve) through which a fall in pressure starts off the expansion process resulting in the
vaporisation of part of the refrigerant liquid.
The result at this point is a low-pressure and low-temperature liquid-gas mixture entering the evaporator, where it takes
the heat required for vaporisation.
When the refrigerant liquid-vapour is uniformly distributed in the direct expansion evaporator tubes, heat is exchanged
with the cooling water, thus reducing the temperature until complete evaporation, followed by superheating.
Once it has reached the superheated-vapour state, the refrigerant leaves the evaporator and is once again taken into the
compressor to repeat the cycle.
Controlling the partial recovery circuit and installation recommendations
The partial heat recovery system is not managed and/or controlled by the machine. The installer should follow the
suggestions below for best system performance and reliability:
1)
Install a mechanical filter on the heat exchanger inlet pipe.
2)
Install shut-off valves to isolate the heat exchanger from the water system during periods of inactivity or
system maintenance.
3)
Install a drain valve that allows the heat exchanger to be emptied in the even that air temperature is
expected to fall below 0°C during periods of inactivity of the machine.
4)
Install flexible anti-vibration joints on the heat recovery water inlet and outlet piping, so that
transmission of vibrations, and therefore of noise, to the water system is kept as low as possible.
5)
Do not load exchanger joints with the weight of the heat recovery piping. The water joints of the
exchangers are not designed to support the weight of the piping.
6)
Should heat recovery water temperature be lower than ambient temperature, it is advised to switch off
the heat recovery water pump 3 minutes after having switched off the last compressor.
D–EIMWC00404-14EN - 52/86
Fig. 10 - Refrigeration cycle of the EWWD I-SS Single Circuit
LEGEND
COMPRESSOR
EVAPORATOR
CONDENSER
OIL SEPARATOR
EXPANSION VALVE
CHECK VALVE
SIGHT GLASS
SAFETY VALVE
SHUT-OFF VALVE
2 WAY ANGLE VALVE
WITH
GAS CHARGE PORT
PARTIAL HEAT RECOVERY
(OPTIONAL)
15,5 bar
SOLENOID VALVE
23,5 bar
23,5 bar
23,5 bar
FLARE VALVE
IN/OUT
WATER
PARTIAL
RECOVERY
R1
WO1
Y5
COMPRESSOR CRANKCASE HEATER
OIL PRESSURE TRANDUCER
LIQUID INJECTION SOL. VALVE
F12 LP
LOW PRESSURE SWITCH
F13 HP
HIGH PRESSURE SWITCH
WH1
HIGH PRESSURE TRANSDUCER (0 ÷ 30 bar)
WL1
LOW PRESSURE TRANSDUCER (-0.5 ÷ 7 bar)
WD1
OIL TEMPERATURE
WOE
LEAVING WATER TEMPERATURE
WIE
ENTERING WATER TEMPERATURE
ST1
SUCTION TEMPERATURE
Fig. 11 - Refrigeration cycle of the EWLD I-SS Single Circuit
LEGEND
COMPRESSOR
EVAPORATOR
CONDENSER
OIL SEPARATOR
EXPANSION VALVE
DISHARGE
LINE
CONNECTION
CHECK VALVE
SIGHT GLASS
23,5 bar
24.5 BAR
SAFETY VALVE
SHUT-OFF VALVE
2 WAY ANGLE VALVE
WITH
GAS CHARGE PORT
15,5 bar
23,5 bar
SOLENOID VALVE
FLARE VALVE
R1
WO1
Y5
COMPRESSOR CRANKCASE HEATER
OIL PRESSURE TRANDUCER
LIQUID INJECTION SOL. VALVE
F12 LP
LOW PRESSURE SWITCH
F13 HP
HIGH PRESSURE SWITCH
WH1
HIGH PRESSURE TRANSDUCER (0 ÷ 30 bar)
WL1
LOW PRESSURE TRANSDUCER (-0.5 ÷ 7 bar)
WD1
OIL TEMPERATURE
WOE
LEAVING WATER TEMPERATURE
WIE
ENTERING WATER TEMPERATURE
ST1
SUCTION TEMPERATURE
D–EIMWC00404-14EN - 54/86
LIQUID
LINE
CONNECTION
Fig. 12 - Refrigeration cycle of the EWLD I-SS Single Circuit
LEGEND
COMPRESSOR
EVAPORATOR
CONDENSER
OIL SEPARATOR
EXPANSION VALVE
CHECK VALVE
DISHARGE
LINE
CONNECTION
SIGHT GLASS
23,5 bar
24.5 BAR
SAFETY VALVE
SHUT-OFF VALVE
2 WAY ANGLE VALVE
WITH
GAS CHARGE PORT
15,5 bar
SOLENOID VALVE
23,5 bar
FLARE VALVE
R1
WO1
Y5
COMPRESSOR CRANKCASE HEATER
OIL PRESSURE TRANDUCER
LIQUID INJECTION SOL. VALVE
F12 LP
LOW PRESSURE SWITCH
F13 HP
HIGH PRESSURE SWITCH
WH1
HIGH PRESSURE TRANSDUCER (0 ÷ 30 bar)
WL1
LOW PRESSURE TRANSDUCER (-0.5 ÷ 7 bar)
WD1
OIL TEMPERATURE
WOE
LEAVING WATER TEMPERATURE
WIE
ENTERING WATER TEMPERATURE
ST1
SUCTION TEMPERATURE
D–EIMWC00404-14EN - 55/86
Fig. 13 - Refrigeration cycle of the EWWD Single Circuit – Total heat recovery
LEGEND
COMPRESSOR
EVAPORATOR
CONDENSER
OIL SEPARATOR
EXPANSION VALVE
15,5 bar
CHECK VALVE
SIGHT GLASS
SAFETY VALVE
SHUT-OFF VALVE
2 WAY ANGLE VALVE
WITH
GAS CHARGE PORT
SOLENOID VALVE
FLARE VALVE
R1
WO1
Y5
COMPRESSOR CRANKCASE HEATER
OIL PRESSURE TRANDUCER
LIQUID INJECTION SOL. VALVE
F12 LP
LOW PRESSURE SWITCH
F13 HP
HIGH PRESSURE SWITCH
WH1
HIGH PRESSURE TRANSDUCER (0 ÷ 30 bar)
WL1
LOW PRESSURE TRANSDUCER (-0.5 ÷ 7 bar)
WD1
OIL TEMPERATURE
WOE
LEAVING WATER TEMPERATURE
WIE
ENTERING WATER TEMPERATURE
ST1
SUCTION TEMPERATURE
D–EIMWC00404-14EN - 56/86
23,5 bar
23,5 bar
23,5 bar
Fig. 14 - Refrigeration cycle of the EWWD I-XS Single Circuit
LEGEND
COMPRESSOR
EVAPORATOR
CONDENSER
OIL SEPARATOR
EXPANSION VALVE
CHECK VALVE
SIGHT GLASS
SAFETY VALVE
SHUT-OFF VALVE
2 WAY ANGLE VALVE
WITH
GAS CHARGE PORT
PARTIAL HEAT RECOVERY
(OPTIONAL)
15,5 bar
SOLENOID VALVE
FLARE VALVE
23,5 bar
23,5 bar
23,5 bar
IN/OUT
WATER
PARTIAL
RECOVERY
R1
WO1
Y5
COMPRESSOR CRANKCASE HEATER
OIL PRESSURE TRANDUCER
LIQUID INJECTION SOL. VALVE
F12 LP
LOW PRESSURE SWITCH
F13 HP
HIGH PRESSURE SWITCH
WH1
HIGH PRESSURE TRANSDUCER (0 ÷ 30 bar)
WL1
LOW PRESSURE TRANSDUCER (-0.5 ÷ 7 bar)
WD1
OIL TEMPERATURE
WOE
LEAVING WATER TEMPERATURE
WIE
ENTERING WATER TEMPERATURE
ST1
SUCTION TEMPERATURE
D–EIMWC00404-14EN - 57/86
Fig.15 - Refrigeration cycle of the EWWD I-SS Double Circuits
PARTIAL HEAT RECOVERY
(OPTIONAL)
23,5 bar
15,5 bar
23,5 bar
23,5 bar
LEGEND
COMPRESSOR
IN/OUT
WATER
PARTIAL
RECOVERY
EVAPORATOR
CONDENSER
OIL SEPARATOR
EXPANSION VALVE
CHECK VALVE
SIGHT GLASS
SAFETY VALVE
SHUT-OFF VALVE
2 WAY ANGLE VALVE
WITH
GAS CHARGE PORT
SOLENOID VALVE
23,5 bar
23,5 bar
FLARE VALVE
IN/OUT
WATER
PARTIAL
RECOVERY
PARTIAL HEAT RECOVERY
(OPTIONAL)
R1
WO1
Y5
COMPRESSOR CRANKCASE HEATER
OIL PRESSURE TRANDUCER
LIQUID INJECTION SOL. VALVE
F12 LP
LOW PRESSURE SWITCH
F13 HP
HIGH PRESSURE SWITCH
WH1
HIGH PRESSURE TRANSDUCER (0 ÷ 30 bar)
WL1
LOW PRESSURE TRANSDUCER (-0.5 ÷ 7 bar)
WD1
OIL TEMPERATURE
WOE
LEAVING WATER TEMPERATURE
WIE
ENTERING WATER TEMPERATURE
ST1
SUCTION TEMPERATURE
D–EIMWC00404-14EN - 58/86
15,5 bar
23,5 bar
Fig. 16 - Refrigeration cycle of the EWLD I-SS Double Circuits
DISHARGE
LINE
CONNECTION
23,5 bar
15,5 bar
23,5 bar
LEGEND
COMPRESSOR
EVAPORATOR
CONDENSER
OIL SEPARATOR
EXPANSION VALVE
CHECK VALVE
LIQUID
LINE
CONNECTION
SIGHT GLASS
SAFETY VALVE
SHUT-OFF VALVE
2 WAY ANGLE VALVE
WITH
GAS CHARGE PORT
LIQUID
LINE
CONNECTION
SOLENOID VALVE
FLARE VALVE
DISHARGE
LINE
CONNECTION
23,5 bar
15,5 bar
R1
COMPRESSOR CRANKCASE HEATER
23,5 bar
WO1
Y5
OIL PRESSURE TRANDUCER
LIQUID INJECTION SOL. VALVE
F12 LP
LOW PRESSURE SWITCH
F13 HP
HIGH PRESSURE SWITCH
WH1
HIGH PRESSURE TRANSDUCER (0 ÷ 30 bar)
WL1
LOW PRESSURE TRANSDUCER (-0.5 ÷ 7 bar)
WD1
OIL TEMPERATURE
WOE
LEAVING WATER TEMPERATURE
WIE
ENTERING WATER TEMPERATURE
ST1
SUCTION TEMPERATURE
D–EIMWC00404-14EN - 59/86
Fig. 17 - Refrigeration cycle of the EWLD I-SS Double Circuits
23,5 bar
DISHARGE
LINE
CONNECTION
15,5 bar
23,5 bar
LEGEND
COMPRESSOR
23,5 bar
EVAPORATOR
CONDENSER
OIL SEPARATOR
EXPANSION VALVE
CHECK VALVE
23,5 bar
LIQUID
LINE
CONNECTION
SIGHT GLASS
SAFETY VALVE
SHUT-OFF VALVE
2 WAY ANGLE VALVE
WITH
GAS CHARGE PORT
SOLENOID VALVE
FLARE VALVE
DISHARGE
LINE
CONNECTION
23,5 bar
15,5 bar
R1
COMPRESSOR CRANKCASE HEATER
23,5 bar
WO1
Y5
OIL PRESSURE TRANDUCER
LIQUID INJECTION SOL. VALVE
F12 LP
LOW PRESSURE SWITCH
F13 HP
HIGH PRESSURE SWITCH
WH1
HIGH PRESSURE TRANSDUCER (0 ÷ 30 bar)
WL1
LOW PRESSURE TRANSDUCER (-0.5 ÷ 7 bar)
WD1
OIL TEMPERATURE
WOE
LEAVING WATER TEMPERATURE
WIE
ENTERING WATER TEMPERATURE
ST1
SUCTION TEMPERATURE
D–EIMWC00404-14EN - 60/86
Fig. 18 - Refrigeration cycle of the EWWD Double Circuits – Total heat recovery
23,5 bar
DISHARGE
LINE
CONNECTION
23,5 bar
LEGEND
COMPRESSOR
15,5 bar
23,5 bar
EVAPORATOR
CONDENSER
OIL SEPARATOR
EXPANSION VALVE
CHECK VALVE
23,5 bar
LIQUID
LINE
CONNECTION
SIGHT GLASS
SAFETY VALVE
SHUT-OFF VALVE
2 WAY ANGLE VALVE
WITH
GAS CHARGE PORT
SOLENOID VALVE
FLARE VALVE
DISHARGE
LINE
CONNECTION
23,5 bar
15,5 bar
R1
COMPRESSOR CRANKCASE HEATER
23,5 bar
WO1
Y5
OIL PRESSURE TRANDUCER
LIQUID INJECTION SOL. VALVE
F12 LP
LOW PRESSURE SWITCH
F13 HP
HIGH PRESSURE SWITCH
WH1
HIGH PRESSURE TRANSDUCER (0 ÷ 30 bar)
WL1
LOW PRESSURE TRANSDUCER (-0.5 ÷ 7 bar)
WD1
OIL TEMPERATURE
WOE
LEAVING WATER TEMPERATURE
WIE
ENTERING WATER TEMPERATURE
ST1
SUCTION TEMPERATURE
D–EIMWC00404-14EN - 61/86
Fig. 19 - Refrigeration cycle of the EWWD I-XS Double Circuits
PARTIAL HEAT RECOVERY
(OPTIONAL)
15,5 bar
23,5 bar
23,5 bar
23,5 bar
LEGEND
COMPRESSOR
IN/OUT
WATER
PARTIAL
RECOVERY
EVAPORATOR
CONDENSER
OIL SEPARATOR
EXPANSION VALVE
CHECK VALVE
SIGHT GLASS
SAFETY VALVE
SHUT-OFF VALVE
2 WAY ANGLE VALVE
WITH
GAS CHARGE PORT
SOLENOID VALVE
23,5 bar
23,5 bar
PARTIAL HEAT RECOVERY
(OPTIONAL)
FLARE VALVE
IN/OUT
WATER
PARTIAL
RECOVERY
15,5 bar
23,5 bar
R1
WO1
Y5
COMPRESSOR CRANKCASE HEATER
OIL PRESSURE TRANDUCER
LIQUID INJECTION SOL. VALVE
F12 LP
LOW PRESSURE SWITCH
F13 HP
HIGH PRESSURE SWITCH
WH1
HIGH PRESSURE TRANSDUCER (0 ÷ 30 bar)
WL1
LOW PRESSURE TRANSDUCER (-0.5 ÷ 7 bar)
WD1
OIL TEMPERATURE
WOE
LEAVING WATER TEMPERATURE
WIE
ENTERING WATER TEMPERATURE
ST1
SUCTION TEMPERATURE
D–EIMWC00404-14EN - 62/86
Fig.20 - Refrigeration cycle of the EWWD I-SS Trial Circuits
15,5 bar
23,5 bar
23,5 bar
23,5 bar
LEGEND
IN/OUT
WATER
PARTIAL
RECOVERY
COMPRESSOR
EVAPORATOR
CONDENSER
OIL SEPARATOR
EXPANSION VALVE
CHECK VALVE
SIGHT GLASS
SAFETY VALVE
23,5 bar
23,5 bar
SHUT-OFF VALVE
2 WAY ANGLE VALVE
WITH
GAS CHARGE PORT
SOLENOID VALVE
IN/OUT
WATER
PARTIAL
RECOVERY
FLARE VALVE
PARTIAL HEAT RECOVERY
(OPTIONAL)
R1
WO1
Y5
15,5 bar
23,5 bar
COMPRESSOR CRANKCASE HEATER
OIL PRESSURE TRANDUCER
LIQUID INJECTION SOL. VALVE
F12 LP
LOW PRESSURE SWITCH
F13 HP
HIGH PRESSURE SWITCH
23,5 bar
23,5 bar
WO1
WH1
HIGH PRESSURE TRANSDUCER (0 ÷ 30 bar)
WL1
LOW PRESSURE TRANSDUCER (-0.5 ÷ 7 bar)
WD1
OIL TEMPERATURE
WOE
LEAVING WATER TEMPERATURE
WIE
ENTERING WATER TEMPERATURE
ST1
SUCTION TEMPERATURE
15,5
15.5bar
BAR
ST1
IN/OUT
WATER
PARTIAL
RECOVERY
WL1
23,5 bar
PARTIAL HEAT RECOVERY
(OPTIONAL)
D–EIMWC00404-14EN - 63/86
Fig. 21 - Refrigeration cycle of the EWLD I-SS Trial Circuits
15,5 bar
23,5 bar
23,5 bar
23,5 bar
LEGEND
IN/OUT
WATER
PARTIAL
RECOVERY
COMPRESSOR
EVAPORATOR
CONDENSER
OIL SEPARATOR
EXPANSION VALVE
CHECK VALVE
SIGHT GLASS
SAFETY VALVE
23,5 bar
23,5 bar
SHUT-OFF VALVE
2 WAY ANGLE VALVE
WITH
GAS CHARGE PORT
SOLENOID VALVE
IN/OUT
WATER
PARTIAL
RECOVERY
FLARE VALVE
PARTIAL HEAT RECOVERY
(OPTIONAL)
R1
WO1
Y5
15,5 bar
23,5 bar
COMPRESSOR CRANKCASE HEATER
OIL PRESSURE TRANDUCER
LIQUID INJECTION SOL. VALVE
F12 LP
LOW PRESSURE SWITCH
F13 HP
HIGH PRESSURE SWITCH
23,5 bar
23,5 bar
15,5
bar
15.5 BAR
WO1
WH1
HIGH PRESSURE TRANSDUCER (0 ÷ 30 bar)
23,5 bar
WL1
LOW PRESSURE TRANSDUCER (-0.5 ÷ 7 bar)
WD1
OIL TEMPERATURE
WOE
LEAVING WATER TEMPERATURE
WIE
ENTERING WATER TEMPERATURE
ST1
SUCTION TEMPERATURE
IN/OUT
WATER
PARTIAL
RECOVERY
PARTIAL HEAT RECOVERY
(OPTIONAL)
D–EIMWC00404-14EN - 64/86
ST1
WL1
Fig. 22 - Refrigeration cycle of the EWLD I-SS Trial Circuits
23,5 bar
DISHARGE
LINE
CONNECTION
15,5 bar
23,5 bar
23,5 bar
LEGEND
COMPRESSOR
EVAPORATOR
CONDENSER
OIL SEPARATOR
23,5 bar
EXPANSION VALVE
CHECK VALVE
SIGHT GLASS
SAFETY VALVE
SHUT-OFF VALVE
2 WAY ANGLE VALVE
WITH
GAS CHARGE PORT
23,5 bar
DISHARGE
LINE
CONNECTION
SOLENOID VALVE
15,5 bar
FLARE VALVE
23,5 bar
23,5 bar
R1
WO1
Y5
COMPRESSOR CRANKCASE HEATER
OIL PRESSURE TRANDUCER
LIQUID INJECTION SOL. VALVE
F12 LP
LOW PRESSURE SWITCH
F13 HP
HIGH PRESSURE SWITCH
23,5 bar
15,5
15.5bar
BAR
WH1
HIGH PRESSURE TRANSDUCER (0 ÷ 30 bar)
WL1
LOW PRESSURE TRANSDUCER (-0.5 ÷ 7 bar)
WD1
OIL TEMPERATURE
WOE
LEAVING WATER TEMPERATURE
WIE
ENTERING WATER TEMPERATURE
ST1
SUCTION TEMPERATURE
ST1
WL1
23,5 bar
D–EIMWC00404-14EN - 65/86
Fig. 23 - Refrigeration cycle of the EWWD Trial Circuits– Total heat recovery
15,5 bar
23,5 bar
23,5 bar
23,5 bar
LEGEND
COMPRESSOR
EVAPORATOR
CONDENSER
OIL SEPARATOR
EXPANSION VALVE
CHECK VALVE
SIGHT GLASS
SAFETY VALVE
23,5 bar
23,5 bar
SHUT-OFF VALVE
2 WAY ANGLE VALVE
WITH
GAS CHARGE PORT
SOLENOID VALVE
15,5 bar
FLARE VALVE
23,5 bar
R1
WO1
Y5
COMPRESSOR CRANKCASE HEATER
OIL PRESSURE TRANDUCER
LIQUID INJECTION SOL. VALVE
F12 LP
LOW PRESSURE SWITCH
F13 HP
HIGH PRESSURE SWITCH
23,5 bar
23,5 bar
15,5 bar
WO1
WH1
HIGH PRESSURE TRANSDUCER (0 ÷ 30 bar)
WL1
LOW PRESSURE TRANSDUCER (-0.5 ÷ 7 bar)
WD1
OIL TEMPERATURE
WOE
LEAVING WATER TEMPERATURE
WIE
ENTERING WATER TEMPERATURE
ST1
SUCTION TEMPERATURE
D–EIMWC00404-14EN - 66/86
15.5 BAR
ST1
23,5 bar
WL1
Compressor
The single-screw compressor is of the semi-hermetic type with an asyncronous three-phase, two-pole motor which is
directly splined on the main shaft. The suction gas from the evaporator cools the electric motor before entering the
suction ports. There are temperature sensors inside the electric motor which are completely covered by the coil winding
and constantly monitor motor temperature. Should the coil winding temperature become very high (120°C), a special
external device connected to the sensors and to the electronic controller will deactivate the corresponding compressor.
There are only two moving rotating parts and there are no other parts in the compressor with an eccentric and/or
alternating movement.
The basic components are therefore only the main rotor and the satellites that carry out the compression process,
meshing perfectly together.
Compression sealing is done thanks to a suitably shaped special composite material that is interposed between the main
screw and the satellite. The main shaft on which the main rotor is splined is supported by 2 ball bearings. The system
made up in this way is both statically and dynamically balanced before assembly.
Fig. 24 - Picture of Fr4100 compressor
Compression process
With the single-screw compressor the suction, compression and discharge process takes place in a continuous manner
thanks to the upper satellite. In this process the suction gas penetrates into the profile between the rotor, the teeth of the
upper satellite and the compressor body. The volume is gradually reduced by compression of the refrigerant. The
compressed gas under high pressure is thus discharged into the built-in oil separator. In the oil separator, the gas/oil
mixture and the oil are collected in a cavity in the lower part of the compressor, where they are injected into the
compression mechanisms in order to guarantee compression’s sealing and lubrication of the ball bearings.
Main rotor flutes ‘a’, ‘b’ and ‘c’ are in
communication at one end with the suction
chamber and are sealed at the other end by
the upper satellite teeth. As the main rotor
turns, the effective length of the flutes
increases, thus increasing the volume open to
the suction chamber. Figure 1 clearly
illustrates this process. As flute ‘a’ assumes
the position of flutes ‘b’ and ‘c’ its volume
increases, inducing suction vapour to enter the
flute.
Suction
Gas
1.
1. E 2. Suction
c
b
a
2.
Upon further rotation of the main rotor, the
flutes which have been open to the suction is
chamber engage with the satellite teeth. This
coincides with each flute being progressively
sealed by the main rotor.
c
b
a
Once the flute volume is closed off from the
suction chamber, the suction stage of the
compression cycle is complete.
3.
3. Compression
As the main rotor turns, the volume of gas
trapped within the flute is reduced as the
length of the flute shortens and compression
occurs.
c
b
a
c
b
a
4.
4. Discharge
As the satellite tooth approaches the end of a
flute, the pressure of the trapped vapour
reaches a maximum value occurring when the
leading edge of the flute begins to overlap the
triangular
shaped
discharge
port.
Compression immediately ceases as the gas
is delivered into the discharge manifold. The
satellite tooth continues to scavenge the flute
until the flute volume is reduced to zero. This
compression process is repeated for each
flute/satellite tooth in turn.
Discharge
gas
b
a
b
a
Oil separator not shown
Fig. 25 - Compression process
D–EIMWC00404-14EN - 68/86
Load
Unload
Fig. 26 - Refrigeration capacity control mechanism of compressor Fr4
D–EIMWC00404-14EN - 69/86
Pre-startup checks
General
Once the machine has been installed, use the following procedure to check that it has been done correctly:
CAUTION
Switch off the power supply of the machine before performing any checks.
Failure to open the power switches at this stage can result in serious injury to the operator or even death.
Inspect all the electrical connections to the power circuits and to the compressors, including the contactors, fuse holders
and electrical terminals and check that they are clean and well secured. Even though these checks are carried out at the
factory on every machine that is shipped, vibrations during transportation may loosen some electrical connections.
CAUTION
Check that the electrical terminals of cables are well tightened. A loose cable can overheat and give rise to problems
with the compressors.
Open discharge, liquid, liquid injection and suction (if installed) valves.
WARNING
Do not start up the compressors if the delivery, liquid, liquid injection or suction valves are closed. Failure to open
these valves can cause serious damage the compressor.
It is absolutely forbidden to close the valves on the delivery and suction piping when the unit is running.
These valves can be closed only when the compressor is off during maintenance of the unit. This operation must be
carried out by qualified technical personnel holding the qualifications requested by local and/or European laws and
with the adoption of the foreseen Personal and Collective Protection Devices.
Check the power supply voltage at the general door-block disconnector switch terminals. The power supply voltage must
be the same as that on the nameplate. Maximum allowed tolerance  10%.
Voltage unbalance between the three phases must not exceed  3%.
The unit comes with a factory-supplied phase monitor that prevents compressors from starting if the phase sequence is
incorrect. Properly connect the electrical terminals to the disconnector switch so as to ensure alarm-free operation. If the
phase monitor triggers an alarm once the machine has been powered, just invert two phases at the general
disconnecting switch supply (unit power supply). Never invert the electrical wiring on the monitor.
ATTENTION
Starting up with the wrong sequence of phases irreparably compromises operation of the compressor. Ensure that
phases L1, L2 and L3 correspond in sequence to R, S, and T.
Fill the water circuit and remove air from the system’s highest point and open the air valve above the evaporator shell.
Remember to close it again after filling. The design pressure on the water side of the evaporator is 10.0 bar. Never
exceed this pressure at any time during the life of the machine.
IMPORTANT
Before putting the machine into operation, clean the water circuit. Dirt, scaling, corrosion residue and other foreign
material can accumulate inside the heat exchanger and reduce its heat exchanging capacity. Pressure drops can
increase as well, thus reducing water flow. Proper water treatment therefore reduces the risk of corrosion, erosion,
scaling, etc. The most appropriate water treatment must be determined locally, according to the type of system and
local characteristics of the process water.
The manufacturer is not responsible for damage to or malfunctioning of equipment caused by failure to treat water or
by improperly treated water.
D–EIMWC00404-14EN - 70/86
Units with external water pump
Start the water pump and check the water system for any leaks; repair these if necessary. While the water pump is in
operation, adjust the water flow until the design pressure drop for the evaporator is reached. Adjust the flow switch
trigger point (not factory-supplied), to ensure operation of the machine within a  20% flow range.
ATTENTION
From this moment onwards, the machine will be under electrical power. Use extreme caution during
subsequent operation.
A lack of attention during subsequent operation may cause serious personal injury.
Electrical power supply
The machine’s power supply voltage must be the same as that specified on the nameplate  10% while the voltage
unbalance between phases must not be in excess of  3%. Measure the voltage between phases and if the value does
not fall within the established limits, correct it before starting the machine.
CAUTION
Provide suitable power supply voltage. Unsuitable power supply voltage could cause malfunction of the control
components and undesired triggering of the thermal protection devices, along with a considerable reduction in the life
of the contactors and electric motors.
Unbalance in power supply voltage
In a three-phase system, excessive unbalance between the phases causes overheating of the motor. The maximum
allowed voltage unbalance is 3%, calculated as follows:
Unbalance %:
V max  Vaverage
x100  _____ %
Vaverage
Example: the three phases measure 383, 386 and 392 Volts respectively, the average is:
383+386+392 = 387 Volts
3
thus the unbalance percentage is:
392  387
below the maximum allowed (3%)
x100  1,29%
387
Oil Heaters power supply
Each compressor comes with an electrical resistance located in the compressor’s lower area. Its purpose is to warm the
lubricating oil and thus avoid the mixing of refrigerant fluid within.
It is therefore necessary to ensure that the resistances are powered at least 24 hours before the planned start-up time.
To ensure that they are activated, it is sufficient to keep the machine on by closing the general disconnecting switch Q10.
The microprocessor, however, has a series of sensors that prevent the compressor from being started up when the oil
temperature is not at least 5°C above the saturation temperature corresponding to the current pressure.
Keep the Q0, Q1, Q2 and Q12 switches in the Off (or 0) position until the machine is to be started up.
Emergency Stop
The machine has an emergency stop system which cuts off power to the compressors, allowing the machine to stop
safely in case of danger. The emergency stop is triggered off by pressing the red mushroom button on the door of the
machine’s electrical panel.
After the machine has stopped, an alarm signal is generated in the unit control card, which reports the triggering of the
emergency stop and prevents the re-starting of the compressors. To restart the compressors:
 Reset the emergency button
 Cancel the alarm in the control card.
ATTENTION
The emergency button cuts off electrical power to the compressors, but not to the machine electrical panel. Take all
necessary precautions therefore, if action must be taken on the machine subsequent to an emergency stop.
D–EIMWC00404-14EN - 71/86
Startup procedure
Turning on the machine
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
13.
14.
With the general disconnecting switch Q10 closed, check that switches Q0, Q1, Q2 and Q12 are in the Off (or 0)
position.
Close the thermal-magnetic switch Q12 and wait for the microprocessor and the control to start. Check that the oil
temperature is warm enough. The oil temperature must be at least 5°C above the saturation temperature of the
refrigerant in the compressor.
If the oil is not warm enough, it will not be possible to start the compressors and the phrase “Oil Heating” will appear
on the microprocessor display.
Start the water pump.
Turn the Q0 switch to On and wait for “Unit-On/Compressor Stand-By” to appear on the display.
Check that the evaporator pressure drop is the same as the design pressure drop and correct if necessary. The
pressure drop must be measured at the factory-supplied charge connections placed on the evaporator piping. Do
not measure the pressure drops at points where any valves and/or filters are interposed.
When starting up for the first time, turn the Q0 switch to Off to check that the water pump stays on for three minutes
before it stops.
Turn the Q0 switch to On again.
Check that the local temperature setpoint is set to the required value by pressing the Set key.
Turn the Q1 switch to On (or 1) to start compressor #1.
Once the compressor has started, wait for at least 1 minute for the system to stabilise. During this time the
controller will perform a series of operations to empty the evaporator (pre-purge) to ensure a safe start up.
At the end of the pre-purge, the microprocessor will start loading the compressor, now running, in order to reduce
the outlet water temperature. Check the proper functioning of the capacity control by measuring the compressor’s
electrical current consumption.
Check refrigerant evaporation and condensation pressure.
Once the system has stabilized, check that the liquid sight glass located on the expansion valve inlet pipe is
completely fully (without bubbles) and that the humidity indicator shows “Dry”. Any bubbles inside the liquid sight
glass might indicate a low refrigerant level or an excessive pressure drop through the filter dryer or an expansion
valve that is blocked at the full open position.
In addition to checking the liquid sight glass, check circuit operating parameters by verifying:
a) Superheating of refrigerant at compressor suction
b) Superheating of refrigerant at compressor discharge
c) Subcooling of liquid coming out of the condenser banks
d) Evaporation pressure
e) Condensation pressure
Except for liquid temperature and suction temperature for machines with a thermostatic valve, which require the use
of an external thermometer, all other measurements can be carried out by reading the relevant values directly on
the on-board microprocessor display.
15. Turn the Q2 switch to On (or 1) to start compressor #2.
16. Repeat steps 10 through 15 for the second circuit.
Table 5 – Typical operating conditions with compressors at 100%
Economised cycle?
NO
YES
Suction superheating Delivery
superheating
4  6 °C
20  25 °C
4  6 °C
18  23 °C
Liquid subcooling
5  6 °C
10  15 °C
IMPORTANT
The symptoms of a low refrigerant charge are: low evaporation pressure, high suction and exhaust superheating
(beyond the above limits) and a low subcooling level. In this case, add R134A refrigerant to the relevant circuit. The
system has been provided with a charge connection between the expansion valve and the evaporator. Charge
refrigerant until working conditions return to normal.
Remember to reposition the valve cover when finished.
17. To turn off the machine temporarily (daily or weekend shutdown) turn the Q0 switch to Off (or 0) or open the
remote contact between terminals 58 and 59 on terminal board M3 (Installation of remote switch to be carried
out by the customer). The microprocessor will activate the shutdown procedure, which requires several seconds.
Three minutes after the compressors have been shut down, the microprocessor will shut down the pump. Do
not switch off the main power supply so as not to de-activate the electrical resistances of the compressors and
the evaporator.
D–EIMWC00404-14EN - 72/86
IMPORTANT
If the machine is not supplied with a built-in pump, do not shut down the external pump before 3 minutes have
elapsed after the last compressor has shut down. Early shutdown of the pump triggers a water-flow failure alarm.
Seasonal shutdown
1.
2.
3.
4.
5.
6.
Turn switches Q1 and Q2 to the Off (or 0) position to shut down the compressors, using the normal pump-down
procedure.
After the compressors have been shut down, turn switch Q0 to the Off (or 0) position and wait for the built-in water
pump to shut down. If the pump is managed externally, wait for 3 minutes after the compressors have shut down
before turning off the pump.
Open the Q12 thermal-magnetic switch (Off position) inside the control section of the electrical board and then open
the general disconnecting switch Q10 to cut off the machine’s power supply entirely.
Close the compressor intake valves (if any) and delivery valves and also the valves located on the liquid and liquid
injection line.
Place a warning sign on every switch that has been opened, advising to open all the valves before starting the
compressors.
If no water and glycol mixture has been introduced into the system, discharge all the water from the evaporator and
from the connected piping if the machine is to remain inactive during the winter season. One must remember that
once the machine’s power supply has been cut off, the anti-freeze electrical resistance cannot function. Do not
leave the evaporator and piping exposed to the atmosphere during the entire period of inactivity.
Starting up after seasonal shutdown
1.
2.
3.
4.
5.
6.
7.
With the general disconnecting switch open, make sure that all the electrical connections, cables, terminals and
screws are well tightened to ensure good electrical contact.
Verify that the power supply voltage applied to the machine is within 10% of the nominal nameplate voltage and
that the voltage unbalance between the phases is no within 3% range.
Verify that all control devices are in good condition and functioning and that there is a suitable thermal load for startup.
Verify that all the connection valves are well tightened and that there are no refrigerant leaks. Always reposition the
valve covers.
Verify that switches Q0, Q1, Q2 and Q12 are in the open position (Off). Turn the general disconnecting switch Q10
to the On position. Doing this will allow to turn on the electrical resistances of the compressors. Wait at least 12
hours for them to warm up the oil.
Open all suction, delivery, liquid and liquid injection valves. Always reposition valve covers.
Open the water valves to fill the system and vent the air from the evaporator through the vent valve installed on its
shell. Verify that there are no water leaks from the piping.
D–EIMWC00404-14EN - 73/86
System maintenance
WARNING
All routine and non-routine maintenance activities on the machine must be carried out solely by qualified personnel
who are familiar with the machine characteristics, operation and maintenance procedures, and who are aware of the
safety requirements and risks involved.
WARNING
It 's absolutely forbidden to remove all the protections of the moving parts of the unit
ATTENTION
The causes of repeated shutdowns deriving from triggering of safety devices must be investigated and corrected.
Re-starting the unit after simply resetting the alarm can seriously damage the equipment.
ATTENTION
A correct refrigerant and oil charge is essential for optimal operation of the machine and for environmental protection.
Any oil and refrigerant recovery must conform to legislation in force.
General
IMPORTANT
Besides the checks suggested in the routine maintenance program, it is recommended to schedule periodical
inspections, to be carried out by qualified personnel, as follows:
4 inspections per year (every three months) for units running about 365 days per year;
2 inspections per year (1 at seasonal start-up and the second one in the middle of the season) for units running about
180 days per year with seasonal operation.
1 inspection per year 1 (at seasonal start-up) for units running about 90 days per year with seasonal operation.
IMPORTANT
The manufacturer of the unit requires users to have a complete check on the unit and on the state of the pressurised
refrigeration circuits carried out after ten years of use, in compliance with Italian law (Lgs. Decree 93/2000), for all
groups belonging to categories I and IV, containing fluids of group 2.
The manufacturer also recommends that all users analyse compressor vibrations annually and make routine
inspections to check on possible refrigerant leaks. These checks ascertain that the refrigeration circuit is intact and
safe and must be carried out according to local and/or European laws by personnel holding the qualifications required
by such laws.
Compressor maintenance
The analysis of vibrations is a good method for verifying the mechanical conditions of the compressor.
Verification of vibration readings immediately after start-up and periodically on an annual basis is recommended. The
compressor load must be similar to the previous measurement’s load to ensure measurement reliability.
Lubrication
The units do not require a routine procedure for lubrication of components.
Compressor oil is of the synthetic type and is highly hygroscopic. It is therefore advised to limit its exposure to the
atmosphere during storage and filling. It is recommended that the oil be exposed to the atmosphere for no more than
10 minutes.
The compressor oil filter is located under the oil separator (delivery side). Its replacement is advised when its pressure
drop exceeds 2.0 bar. The pressure drop across the oil filter is the difference between the compressor discharge
pressure and the oil pressure. Both these pressures can be monitored through the microprocessor for both compressors.
D–EIMWC00404-14EN - 74/86
Fig. 27 - Installation of control devices for Fr4 compressor
D–EIMWC00404-14EN - 75/86
Routine maintenance
Table 6 – Routine maintenance programme (Note 2)
General
Reading of operating data (Note 3)
Visual inspection of machine for any damage and/or loosening
Verification of thermal insulation integrity
Clean and paint where necessary
Analysis of water (Note 5)
Weekly
Condenser section:
Clean the exchangers (Note 8)
Notes:
1)
2)
3)
4)
5)
6)
Yearly
(Note 2)
X
X
X
X
X
Electrical:
Verification of control sequence
Verify contactor wear – Replace if necessary
Verify that all electrical terminals are tight – Tighten if necessary
Clean inside the electrical control board
Visual inspection of components for any signs of overheating
Verify operation of compressor and electrical resistance
Measure compressor motor insulation using the Megger
Refrigeration circuit:
Check for any refrigerant leakage
Verify refrigerant flow using the liquid sight glass – Sight glass full
Verify filter dryer pressure drop
Verify oil filter pressure drop (Note 4)
Analyse compressor vibrations
Analyse compressor oil acidity (Note 6)
Check safety valves (Note 7)
Monthly
(Note 1)
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
Monthly activities include all the weekly ones
The annual (or early season) activities include all weekly and monthly activities
Machine operating values should be read on a daily basis thus keeping high observation standards
Replace the oil filter when the pressure drop across it reaches 2.0 bar
Check for any dissolved metals
TAN (Total Acid Number) :
0.10 : No action
Between 0.10 and 0.19 : Replace anti-acid filters and re-check after 1000
running hours. Continue to replace filters until the TAN is lower than 0.10.
0.19 : Change oil, replace oil filter and filter dryer. Verify at regular intervals.
7)
Safety valves
Check that the lid and seal have not been tampered with.
Check that the discharge socket of the safety valves is not obstructed by any objects, rust or ice.
Check the manufacturing date shown on the safety valve. Replace the valve every 5 years and make sure it is
compliant with the current regulations in terms of the installation of the unit.
8)
Clean the pipes of the exchanger mechanically and chemically if the following occur: drop in the condenser
water capacity, drop in the differential temperature between inlet and outlet water, high temperature
condensation.
Replacement of filter dryer
It is strongly advised that the filter dryer cartridges be replaced in the event of a considerable pressure drop across the
filter or if bubbles are observed through the liquid sight glass while the subcooling value is within the accepted limits.
Replacement of the cartridges is advised when the pressure drop across the filter reaches 50 kPa with the compressor
under full load.
The cartridges must also be replaced when the humidity indicator in the liquid sight glass changes colour and shows
excessive humidity, or when the periodic oil test reveals the presence of acidity (TAN is too high).
Procedure to replace the filter dryer cartridge
ATTENTION
Ensure proper water flow through the evaporator during the entire servicing period. Interrupting the water flow during
this procedure would cause the evaporator to freeze, with consequent breakage of internal piping.
D–EIMWC00404-14EN - 76/86
1.
2.
3.
4.
5.
Shut down the relevant compressor by turning the Q1 or Q2 switch to Off.
Wait until the compressor has stopped and close the valve located on the liquid line.
Once the compressor has stopped, place a label on the compressor start-up switch, to prevent undesired
start-ups.
Close the compressor suction valve (if any).
Using a recovery unit, remove surplus refrigerant from the liquid filter until atmospheric pressure is reached.
The refrigerant must be stored in a suitable and clean container.
WARNING
To protect the environment, do not release removed refrigerant into the atmosphere. Always use a recovery and
storage device.
6.
7.
8.
9.
Balance internal pressure with external pressure by pressing the vacuum pump valve installed on the filter
cover.
Remove the filter dryer cover.
Remove the filter elements.
Install the new filter elements in the filter.
ATTENTION
Do not start the machine before the cartridge has been correctly inserted in the filter dryer. The unit manufacturer will
accept no responsibility for any damage to persons or property caused during unit functioning if the filter dryer
cartridges have not been correctly inserted.
10.
11.
12.
13.
14.
15.
16.
17.
Replace the cover gasket. Do not allow any mineral oil onto the filter gasket so as not to contaminate the
circuit. Use only compatible oil for this purpose (POE).
Close the filter cover.
Connect the vacuum pump to the filter and pull vacuum to 230 Pa.
Close the vacuum pump valve.
Recharge the filter with the refrigerant recovered during emptying.
Open the liquid line valve.
Open the suction valve (if any).
Start the compressor by turning switch Q1 or Q2.
Replacement of the oil filter
ATTENTION
The lubrication system has been designed to keep most of the oil charge inside the compressor. During operation,
however, a small amount of oil circulates freely in the system, conveyed by the refrigerant. The amount of
replacement oil going into the compressor should therefore be equal to the quantity removed rather than the amount
stated on the nameplate; this will avoid excess of oil during the following start-up.
The quantity of oil removed from the compressor must be measured after having allowed the refrigerant present in the
oil to evaporate for a suitable amount of time. To reduce the refrigerant content in the oil to a minimum, it is advised
that the electrical resistances be kept on and that the oil be removed only when it has reached a temperature of
3545°C.
ATTENTION
The replacement of the oil filter requires careful attention with regard to oil recovering; the oil must not be exposed to
air for more than about 30 minutes.
In case of doubts, verify oil acidity or, if it is not possible to carry out the measurement, replace the charge of lubricant
with fresh oil stored in sealed tanks or in a way that meet supplier specifications.
D–EIMWC00404-14EN - 77/86
ATTENTION
The lubrication system has been designed to keep most of the oil charge inside the compressor. During operation,
however, a small amount of oil circulates freely in the system, conveyed by the refrigerant. The amount of
replacement oil going into the compressor should therefore be equal to the quantity removed rather than the amount
stated on the nameplate; this will avoid excess of oil during the following start-up.
The quantity of oil removed from the compressor must be measured after having allowed the refrigerant present in the
oil to evaporate for a suitable amount of time. To reduce the refrigerant content in the oil to a minimum, it is advised
that the electrical resistances be kept on and that the oil be removed only when it has reached a temperature of
3545°C.
ATTENTION
The replacement of the oil filter requires careful attention with regard to oil recovering; the oil must not be exposed to
air for more than about 30 minutes.
In case of doubts, verify oil acidity or, if it is not possible to carry out the measurement, replace the charge of lubricant
with fresh oil stored in sealed tanks or in a way that meet supplier specifications.
Fr4200 compressor
The compressor oil filter is located at the coupling of the oil inlet piping and the compressor body (suction side). It is
strongly advised that it be replaced when its pressure drop exceeds 2.0 bar. The pressure drop across the oil filter is the
difference between the compressor delivery pressure minus oil pressure. Both pressures can be controlled through the
microprocessor for both compressors.
Required materials:
Oil filter Code 95816-401
Gaskets kit Code 128810988
– Quantity 1
– Quantity 1
Compatible oils:
DAPHNE HERMET OIL FVC68D
The standard oil charge for a compressor is18 litres.
Oil filter replacement procedure
Procedure to replace oil filter
1)
2)
3)
4)
5)
6)
7)
8)
9)
10)
11)
12)
13)
14)
15)
16)
17)
18)
19)
20)
Shut down both compressors by turning the Q1 and Q2 switches to the Off position.
Turn the Q0 switch to Off, wait for the circulation pump to turn off and open the general disconnecting switch
Q10 to cut off the machine’s electrical power supply.
Place a label on the handle of the general disconnecting switch in order to prevent accidental start-up.
Close the suction, discharge and liquid injection valves.
Connect the recovery unit to the compressor and recover the refrigerant in a suitable and clean container.
Evacuate the refrigerant until the internal pressure has turned negative (compared to atmospheric pressure).
The amount of refrigerant dissolved in the oil is reduced to a minimum in this way.
Drain the oil in the compressor by opening the drain valve located under the oil separator.
Remove the oil filter cover and remove the internal filter element.
Replace the cover and internal sleeve gaskets. Do not lubricate the gaskets with mineral oil in order not to
contaminate the system.
Insert the new filter element.
Reposition the filter cover and tighten the screws. The screws must be tightened alternately and progressively
setting the torque wrench at 60 Nm.
Charge the oil from the upper valve located on the oil separator. Considering the high hygroscopy of ester oil, it
should be charged as quickly as possible. Do not expose ester oil to the atmosphere for more than 10 minutes.
Close the oil charging valve.
Connect the vacuum pump and evacuate the compressor up to a vacuum of 230 Pa.
On reaching the above vacuum level, close the vacuum pump valve.
Open the system’s delivery, suction and liquid injection valves.
Disconnect the vacuum pump from the compressor.
Remove the warning label from to the general disconnecting switch.
Close the general disconnecting switch Q10 to supply power to the machine.
Start the machine by following the start-up procedure described above.
D–EIMWC00404-14EN - 78/86
Refrigerant charge
ATTENTION
The units have been designed to operate with R134a refrigerant. DO NOT USE refrigerants other than R134a.
WARNING
The addition or removal of refrigerant gas must be carried out in compliance with the laws and regulations in force.
ATTENTION
When refrigerant gas is added to or removed from the system, ensure proper water flow through the evaporator for
the entire charge/discharge time. Interrupting the water flow during this procedure would cause the evaporator to
freeze with consequent breakage of its internal piping.
Damage caused by freezing makes the warranty void.
WARNING
Removal of the refrigerant and replenishing operations must be performed by technicians who are qualified to use the
appropriate materials for this unit. Unsuitable maintenance can result in uncontrolled losses in pressure and fluid. Do
not disperse the refrigerant and lubricating oil in the environment. Always be equipped with a suitable recovery
system.
The units ship with a full refrigerant charge, but in some cases it might be necessary to replenish the machine in the field.
ATTENTION
Always verify the causes of a loss of refrigerant. Repair the system if necessary then recharge it.
The machine can be replenished under any stable load condition (preferably between 70 and 100%) and under any
ambient temperature condition (preferably above 20°C). The machine should be kept running for at least 5 minutes to
allow the condensation pressure to stabilise.
The subcooling value is about 3-4°C.
Once the subcooling section has been completely filled, additional refrigerant will not increase system efficiency.
However, a small additional quantity of refrigerant (12 kg) makes the system slightly less sensitive.
N.B.: Subcooling varies and requires a few minutes to re-stabilise. However, subcooling should not come below 2°C
under any condition. Also, the subcooling value can change slightly as the water temperature and the suction
superheating vary. As the suction superheating value decreases, there is a corresponding decrease in subcooling.
One of the two following scenarios can arise in a machine without refrigerant:
1.
If the refrigerant level is slightly low, flow of bubbles can be seen through the liquid sight glass. Replenish
the circuit as described in the replenishment procedure.
2.
If the gas level in the machine is moderately low, the corresponding circuit could have some low-pressure
stops. Replenish the corresponding circuit as described in the replenishment procedure.
Refrigerant filling procedure
1)
2)
3)
4)
5)
6)
If the machine has lost refrigerant, it is necessary to first establish the causes before carrying out any
replenishment operation. The leak must be found and repaired. Oil stains are a good indicator, as they can
appear in the vicinity of a leak. However, this is not necessarily always a good search criterion. Searching
with soap and water can be a good method for medium to large leaks, while an electronic leak detector is
required to find small leaks.
Add refrigerant to the system through the service valve on the suction pipe or through the Schrader valve
located on the evaporator inlet pipe.
The refrigerant can be added under any load condition between 25 and 100% of the system capacity.
Suction superheating must be beteen 4 and 6°C.
Add enough refrigerant to fill the liquid sight glass entirely, so that no flow of bubbles can be seen anymore.
Add an extra 2  3 kg of refrigerant as a reserve, to fill the subcooler if the compressor is operating at 50 –
100% load.
Check the subcooling value by reading the liquid pressure and the liquid temperature near the expansion
valve. The subcooling value must be between 3 and 5°C. The subcooling value will be lower at 75  100%
load and higher at 50% load.
Overcharging the system will cause a rise in the compressor’s discharge pressure.
D–EIMWC00404-14EN - 79/86
Standard Checks
Temperature and pressure sensors
The unit comes factory-equipped with all the sensors listed below. Periodically check that their measurements are correct
by means of reference instruments (manometers, thermometers); correct the wrong readings as necessary using the
microprocessor keypad. Well-calibrated sensors ensure better efficiency for the machine and a longer lifetime.
Note: Refer to the microprocessor use and maintenance manual for a complete description of applications, settings and
adjustments.
All sensors are preassembled and connected to the microprocessor. The descriptions of each sensor are listed below:
Outlet water temperature sensor – This sensor is located on the evaporator outlet water connection and is used by the
microprocessor to control the machine load depending on the system’s thermal load. It also helps control the
evaporator’s antifreeze protection.
Inlet water temperature sensor – This sensor is located on the evaporator inlet water connection and is used for
monitoring the return water temperature.
Compressor discharge pressure transducer – This is installed on every compressor and allows to monitor the
discharge pressure and to control the fans. Should the condensation pressure increase, the microprocessor will control
the compressor load in order to allow it to function even if the compressor flow gas must be reduced. It also contributes
to the oil control logic.
Oil pressure transducer – This is installed on every compressor and allows to monitor the oil pressure. The
microprocessor uses this sensor to inform the operator on the conditions of the oil filter and on how the lubrication
system is functioning. By working together with the high- and low-pressure transducers, it protects the compressor from
problems deriving from poor lubrication.
Low-pressure transducer – This is installed on every compressor and allows to monitor the compressor suction
pressure along with low pressure alarms. It contributes to complementing the oil control logic.
Suction sensor – This is installed optionally (if the electronic expansion valve has been requested) on every
compressor, and allows to monitor the suction temperature. The microprocessor uses the signal from this sensor to
control the electronic expansion valve.
Compressor discharge temperature sensor – This is installed on every compressor and allows to monitor compressor
discharge pressure and oil temperature. The microprocessor uses the signal from this sensor to control the liquid
injection and to shut down the compressor in case that the discharge temperature reaches 110°C. It also protects the
compressor from pumping liquid refrigerant at start-up.
D–EIMWC00404-14EN - 80/86
Test sheet
It is recommended that the following operation data are recorded periodically in order to verify correct operation of the
machine over time. These data will also be extremely useful to the technicians who will be performing routine and/or nonroutine maintenance on the machine.
Water side measurements
Chilled water setpoint
Evaporator outlet water temperature
Evaporator inlet water temperature
Evaporator pressure drop
Evaporator water flow rate
°C
°C
°C
kPa
3
m /h
_________
_________
_________
_________
_________
Chilled water setpoint
Condenser outlet water temperature
Condenser inlet water temperature
Condenser pressure drop
Condenser water flow rate
°C
°C
°C
kPa
3
m /h
_________
_________
_________
_________
_________
Refrigerant side measurements
Circuit #1:
Refrigerant/Oil pressure
Refrigerant temperature
Compressor load
N. of expansion valve cycles (electronic only)
Evaporation pressure
Condensation pressure
Oil pressure
Evaporation saturated temperature
Suction gas temperature
Suction superheating
Condensation saturated temperature
Discharge superheating
Liquid temperature
Subcooling
_____
_____
_____
_____
_____
_____
_____
_____
_____
_____
_____
_____
_____
Compressor load
N. of expansion valve cycles (electronic only)
Evaporation pressure
Condensation pressure
Oil pressure
Evaporation saturated temperature
Suction gas temperature
Suction superheating
Condensation saturated temperature
Discharge superheating
Liquid temperature
Subcooling
_____
_____
_____
_____
_____
_____
_____
_____
_____
_____
_____
_____
_____
_____
Compressor load
N. of expansion valve cycles (electronic only)
Evaporation pressure
Condensation pressure
Oil pressure
Evaporation saturated temperature
Suction gas temperature
Suction superheating
Condensation saturated temperature
Discharge superheating
Liquid temperature
Subcooling
_____
_____
_____
_____
_____
_____
_____
_____
_____
_____
_____
_____
_____
_____
%
bar
bar
bar
°C
°C
°C
°C
°C
°C
°C
Circuit #2
Refrigerant/Oil pressure
Refrigerant temperature
External air temperature
%
bar
bar
bar
°C
°C
°C
°C
°C
°C
°C
°C
Circuit #2
Refrigerant/Oil pressure
Refrigerant temperature
External air temperature
%
bar
bar
bar
°C
°C
°C
°C
°C
°C
°C
°C
Electrical measurements
D–EIMWC00404-14EN - 81/86
Analysis of the unit’s voltage unbalance:
Phases:
Unbalance %:
Compressors current – Phases:
Compressor #1
Compressor #2
Compressor #3
D–EIMWC00404-14EN - 82/86
RS
ST
RT
_____ V
_____ V
_____ V
V max  Vaverage
x100  _____ %
Vaverage
R
_____ A
_____ A
_____ A
S
_____ A
_____ A
_____ A
T
_____ A
_____ A
_____ A
Service and limited warranty
All machines are factory-tested and guaranteed for 12 months as of the first start-up or 18 months as of delivery.
These machines have been developed and constructed according to high quality standards ensuring years of failure-free
operation. It is important, however, to ensure proper and periodical maintenance in accordance with all the procedures
listed in this manual.
We strongly advise stipulating a maintenance contract with a service authorized by the manufacturer in order to ensure
efficient and problem-free service, thanks to the expertise and experience of our personnel.
It must also be taken into consideration that the unit requires maintenance also during the warranty period.
It must be borne in mind that operating the machine in an inappropriate manner, beyond its operating limits or not
performing proper maintenance according to this manual can void the warranty.
Observe the following points in particular, in order to conform to warranty limits:
1. The machine cannot function beyond the specified limits
2. The electrical power supply must be within the voltage limits and without voltage harmonics or sudden changes.
3. The three-phase power supply must not have un unbalance between phases exceeding 3%. The machine must
stay turned off until the electrical problem has been solved.
4. No safety device, either mechanical, electrical or electronic must be disabled or overridden.
5. The water used for filling the water circuit must be clean and suitably treated. A mechanical filter must be installed at
the point closest to the evaporator inlet.
6. Unless there is a specific agreement at the time of ordering, the evaporator water flow rate must never be above
120% and below 80% of the nominal flow rate.
D–EIMWC00404-14EN - 83/86
Obligatory routine checks and starting up apparatuses under
pressure
The units are included in category IV of the classification according to European Directive PED 97/23/EC.
For chillers belonging to this category, some local regulations require a periodic inspection by an authorized agency.
Please check with your local requirements.
Important information regarding the refrigerant used
This product contains fluorinated greenhouse gases covered by the Kyoto Protocol. Do not vent gases into the
atmosphere.
Refrigerant type:
GWP(1) value:
R134a
1300
(1)GWP =
global warming potential
The refrigerant quantity is indicated on the unit name plate.
Periodical inspections for refrigerant leaks may be required depending on European or local legislation. Please contact
your local dealer for more information.
Disposal
The unit is made of metal and plastic parts. All these parts must be disposed of in accordance with the local regulations
in terms of disposal. Lead batteries must be collected and taken to specific refuse collection centres.
D–EIMWC00404-14EN - 84/86
D–EIMWC00404-14EN - 85/86
The present publication is drawn up by of information only and does not constitute an offer binding upon Daikin Applied Europe S.p.A..
Daikin Applied Europe S.p.A. has compiled the content of this publication to the best of its knowledge. No express or implied warranty is
given for the completeness, accuracy, reliability or fitness for particular purpose of its content, and the products and services presented
therein. Specification are subject to change without prior notice. Refer to the data communicated at the time of the order. Daikin Applied
Europe S.p.A. explicitly rejects any liability for any direct or indirect damage, in the broadest sense, arising from or related to the use
and/or interpretation of this publication. All content is copyrighted by Daikin Applied Europe S.p.A..
DAIKIN APPLIED EUROPE S.p.A.
Via Piani di Santa Maria, 72 - 00040 Ariccia (Roma) - Italia
Tel: (+39) 06 93 73 11 - Fax: (+39) 06 93 74 014
http://www.daikinapplied.eu
D–EIMWC00404-14EN - 86/86
Was this manual useful for you? yes no
Thank you for your participation!

* Your assessment is very important for improving the work of artificial intelligence, which forms the content of this project

Download PDF

advertising