WDA
WDA
Water to water chillers and heat pumps
WDA water chillers and heat pumps are efficient, low-noise
products designed for medium to large applications.
They are suitable for generating chilled water at temperatures in the region of 7°C, commonly used in applications with
fan coils and/or air handling units.
The use of tandem scroll compressors results in high efficiencies (especially at part loads) and low noise levels, making
them suitable for use in many applications.
Differing versions and a wide range of accessories, enable
the optimal solution to be selected.
VERSIONS
•
•
•
ACCESSORIES
•
•
•
•
•
•
•
•
•
•
•
132
WDA, cooling only version, available in 18 different
sizes.
WDA/HP, reversible heat pump version, available in 18
different sizes.
WDA/EV, condenserless units version, available in 18
different sizes.
A1NT: Hydraulic kit with: pump, expansion valve,
safety valve, flow switch
DSSE: Electronic soft starter
KAVG: Rubber anti-vibration mountings
KAVM: Spring anti-vibration mountings
LS01: Low noise version
MAML: Refrigerant circuit pressure gauges
PCRL: Remote control panel
RP00: Partial heat recovery
V2M0: Source 4÷20 mA modulating valve
VPSF: Pressostatic valve kit for cooling versions
VSLI: Liquid line solenoid valve
Versions WDA ÷ WDA/HP
Cooling capacity (EN14511)
Input power (EN14511)
(1)
(1)
039
045
050
060
070
080
090
110
120
130
kW
43,7
49,9
59,3
67,2
75,0
88,5
100,8
112,0
126,5
141,1
WDA
WDA
kW
10,5
12,1
15,1
16,7
17,7
20,9
23,9
26,9
30,5
34,0
EER (EN14511) (1)
w/w
4,2
4,1
3,9
4,0
4,2
4,2
4,2
4,2
4,1
4,2
Cooling capacity (EN14511) (2)
kW
58,9
67,4
79,6
90,6
101,1
118,3
135,7
151,6
171,2
189,8
Input power (EN14511) (2)
kW
11,1
12,3
15,7
17,5
18,7
21,3
24,7
28,2
31,8
35,3
w/w
5,3
5,5
5,1
5,2
5,4
5,6
5,5
5,4
5,4
5,4
kW
48,8
55,9
65,8
74,0
83,85
98,5
118,3
132,8
149,8
166,6
kW
10,6
11,9
13,7
15,6
17,1
20,4
24,1
27,1
30,7
34,1
w/w
4,6
4,7
4,8
4,7
4,9
4,8
4,9
4,9
4,9
4,9
kW
46,9
53,7
63,1
70,9
80,1
94,9
113,7
127,4
143,8
160,5
kW
13,0
14,7
17,2
19,4
21,2
24,8
29,3
32,9
37,3
41,5
w/w
3,6
3,7
3,7
3,7
3,8
3,8
3,9
3,9
3,9
3,9
EER (EN14511)
(2)
Heating capacity (EN14511)
Input power (EN14511)
COP (EN14511)
(3)
(3)
Heating capacity (EN14511)
Input power (EN14511)
COP (EN14511)
(3)
(4)
(4)
(4)
Power supply
V/Ph/Hz
Peak current
A
111
132
140
162
171
208
259
265
312
320,5
Maximum input current
A
32
42
44
53
62
68
74
80
88,5
97
Compressors / Circuits
n°
2/1
2/1
2/1
2/1
2/1
2/1
2/1
2/1
2/1
2/1
dB(A)
74
74
75
76
76
77
77
78
78
79
dB(A)
46
46
47
48
48
49
49
50
50
51
Sound power
(5)
Sound pressure
(6)
Versions WDA ÷ WDA/HP
400/3/50
152
162
190
210
240
260
300
320
Cooling capacity (EN14511) (1)
kW
162,4
182,5
201,6
223,9
257,6
285,7
323,5
365,2
Input power (EN14511) (1)
kW
38,7
43,4
47,8
53,8
60,9
68,0
77,4
86,7
w/w
4,2
4,2
4,2
4,2
4,2
4,2
4,2
4,2
kW
218,5
249,3
273,5
305,2
350,7
387,0
437,3
496,1
kW
40,4
45,6
49,5
56,5
64,0
71,1
81,2
91,5
w/w
5,4
5,5
5,5
5,4
5,5
5,4
5,4
5,4
kW
190,9
216,5
237,4
266,4
301,4
325,9
367,7
422,4
kW
38,9
43,6
48,2
54,2
61,0
67,9
77,0
86,6
w/w
4,9
5,0
4,9
4,9
4,9
4,8
4,8
4,9
Heating capacity (EN14511) (4)
kW
186,9
206,6
227,0
254,4
287,7
312,0
352,7
403,8
Input power (EN14511) (4)
kW
47,4
53,0
58,6
65,8
74,3
82,7
93,9
105,6
w/w
3,9
3,9
3,9
3,9
3,9
3,8
3,8
3,8
EER (EN14511)
(1)
Cooling capacity (EN14511)
Input power (EN14511)
EER (EN14511)
(2)
(2)
Heating capacity (EN14511)
Input power (EN14511)
COP (EN14511)
COP (EN14511)
(2)
(3)
(3)
(3)
(4)
400/3/50
Power supply
V/Ph/Hz
Peak current
A
358,5
375,4
333
345
400,5
417,5
472,4
506,2
Maximum input current
A
113,9
130,8
148
160
177
194
227,8
261,6
Compressors / Circuits
n°
2/1
2/1
4/2
4/2
4/2
4/2
4/2
4/2
dB(A)
79
79
80
82
82
82
84
84
dB(A)
51
51
52
54
54
54
56
56
Sound power
(5)
Sound pressure
(1)
(3)
(5)
(6)
Cooling: Evaporator water temperature in/out 12/7°C
condenser water temperature in/out 30/35°C. Without pressostatic valve.
Heating: condenser water temperature in/out 30/35°C; evaporator water temperature in/out 10/7°C.
Sound power level in accordance with ISO 9614.
(2)
(4)
(6)
Cooling: Evaporator water temperature in/out 23/18°C
condenser water temperature in/out 30/35°C. Without pressostatic valve.
Heating: condenser water temperature in/out 40/45°C; evaporator water temperature in/out 10/7°C.
Sound pressure level at 10 mt from the unit in free field conditions direction factor Q = 2 in accordance with ISO 9614.
133
www.hidros.it
WDA
WDA
Versions WDA/EV
039
045
050
060
070
080
090
110
120
130
kW
38,8
44,3
52,4
59,3
66,0
78,9
90,4
99,7
112,8
125,8
kW
13,2
15,3
19,4
21,1
22,4
25,9
29,6
33,4
37,7
42,2
3
m /h
6,7
7,6
9,0
10,2
11,3
13,5
15,5
17,1
19,4
21,6
Peak current
A
111
132
140
162
171
208
259
265
312
320,5
Max input current
A
32
42
44
53
62
68
74
80
88,5
97
Cooling capacity
(5)
Compressor input power
Water flow
(5)
(5)
Power supply
Compressors / Circuits
Sound power level
(3)
Sound pressure level (4)
n°
2/1
2/1
2/1
2/1
2/1
2/1
2/1
2/1
2/1
2/1
dB(A)
74
74
75
76
76
77
77
78
78
79
dB(A)
46
46
47
48
48
49
49
50
50
51
152
162
190
210
240
260
300
320
kW
145,0
162,6
178,3
197,8
221,4
245,8
277,5
314,0
kW
48,0
53,9
59,2
66,5
76,3
85,1
96,9
108,6
Versions WDA/EV
Cooling capacity
400/3/50
V/Ph/Hz
(5)
Compressor input power
3
m /h
24,9
27,9
30,6
33,9
38,0
42,2
47,6
53,9
Peak current
A
358,5
375,4
333
345
400,5
417,5
472,4
506,2
Max input current
A
113,9
130,8
148,
160
177
194
227,8
261,6
Water flow
(5)
(5)
Power supply
Compressors / Circuits
Sound power level
(3)
Sound pressure level
(5)
(3)
(4)
400/3/50
V/Ph/Hz
(4)
n°
2/1
2/1
4/2
4/2
4/2
4/2
4/2
4/2
dB(A)
79
79
80
82
82
82
84
84
dB(A)
51
51
52
54
54
54
56
56
For EV version: condensing temperature 50 °C, water temperature in/out 12/7 °C.
Sound power level in accordance with ISO 9614. (LS verions).
Sound pressure level at 10 mt from the unit in free field conditions direction factor Q = 2 in accordance with ISO 9614 (LS versions)
FRAME
All WDA units are made from hot-galvanised sheet steel, painted with polyurethane
powder enamel and stoved at 180°C to
provide maximum protection against corrosion. The frame is self-supporting with
removable panels. All screws and rivets
used are made from stainless steel. The
standard colour of the units is RAL 9018.
REFRIGERANT CIRCUIT
The refrigerant utilised is R410A. The refrigerant circuit is assembled using internationally recognised brand name components
with all brazing and welding being performed in accordance with ISO 97/23. Each
refrigerant circuit is totally independent
from the other. Failure of one circuit does
not influence the other circuit. The refrigerant circuit includes: sight glass, filter drier,
reversing valve (for heat pump version
only), one way valve (for heat pump version
only), liquid receiver (for heat pump version
only), Schraeder valves for maintenance
and control and pressure safety device (for
compliance with PED regulations).
Also available is an electronic expansion
valve with electronic control which optimises the efficiency in part load conditions
(option),
COMPRESSORS
The compressors utilised are scroll type.
All compressors are fitted with a crankcase
heater and each compressor has a klixon
embedded in the motor winding for thermal
overload protection. The crankcase heater
is always energised when the compressor
is in stand-by. Access to the compressors
is through the front and side panels. The
compressors used are all in tandem configuration. This results in much higher efficiencies at part loads compared to units
with independent refrigerant circuits.
CONDENSERS
The condensers are braze welded, plate
type heat exchangers, manufactured from
134
AISI 316 stainless steel. Utilisation of this
type of exchanger results in a massive reduction of the refrigerant charge of the unit
compared to the traditional shell-in-tube
type. A further advantage is a reduction in
the overall dimensions of the unit and an increase in efficiency of the refrigerant cycle
in partial loads.. From size 039 to size 162
they have a single water side circuit, from
size 144 upwards they are double circuit
“cross flow” type.
EVAPORATORS
The evaporators are braze welded, plate
type heat exchangers, manufactured from
AISI 316 stainless steel. From size 039 to
size 162 they have a single water side circuit, from size 190 upwards they are double
circuit “cross flow” type.
All units are supplied with a sub-cooler to
enhance the performance of the refrigerant
cycle. The evaporators are factory insulated with flexible close cell material and are
supplied with a temperature sensor as antifreeze protection.
WDA
ELECTRICS ENCLOSURE
The enclosure is manufactured in order to
comply with the requirements of the electromagnetic compatibility standards CEE
73/23 and 89/336. Access to the enclosure
is achieved by removing the front panel of
the unit. The following components are supplied as standard on all units: main switch,
thermal overloads (protection of pumps and
CONTROL AND PROTECTION DEVICES
All units are supplied with the following
control and protection devices: Return
water temperature sensor installed on the
return water line from the building (12°C),
antifreeze protection sensor installed on
the outlet water temperature (7°C), high
pressure switch with manual reset, low
pressure switch with automatic reset, high
pressure safety valve, compressor thermal
overload protection, fans thermal overload
protection and flow switch.
mings and alarms. It is designed to operate
with refrigerant R410a but is supplied with
a holding charge of nitrogen.
WDA
MICROPROCESSORS
All WDA units are supplied as standard
with microprocessor controls. The microprocessor controls the following functions:
control of the water temperature, antifreeze
protection, compressor timing, compressor
automatic starting sequence, alarm reset,
volt free contact for remote general alarm,
alarms and operation LED’s. If required
(available as an option), the microprocessor
can be configured in order for it to connect
to a site BMS system thus enabling remote
control and management. The Hidros technical department can discuss and evaluate,
in conjunction with the customer, solutions
using MODBUS protocols.
fans), compressor fuses, control circuit automatic breakers, compressor contactors,
fan contactors and pump contactors. The
terminal board has volt free contacts for
remote ON-OFF, Summer/Winter change
over (heat pumps only) and general alarm.
For all three phase units, a sequence relay
that disables the power supply in the event
that the phase sequence is incorrect (scroll
compressors can be damaged if they rotate
in the wrong direction), is fitted as standard.
HEAT PUMP VERSIONS HP
The heat pump versions are provided with
a 4 way reversing valve and are designed
to produce hot water up to a temperature
of 50°C. They are always supplied with a
liquid receiver and a second thermostatic
valve in order to optimize the efficiency
of the refrigerant cycle in heating and in
cooling. The microprocessor controls defrost automatically (when operating in low
ambient conditions) and also the summer/
winter change over.
PARTIAL HEAT RECOVERY RP
This version is supplied with an auxiliary
heat exchanger fitted in series with the unit
condenser thereby enabling it to produce
hot water when the unit is operating in cooling mode.
CONDENSERLESS VERSIONS EV
This version includes a microprocessor
control to manage both the compressor ti-
CONDENSERLESS UNITS REFRIGERANT CONNECTIONS
Condensing unit (WDR/EV) versions must
be connected to the indoor unit by refrigerant lines. The condensing units are supplied without refrigerant charge but with a
holding charge of nitrogen.
Piping layout and max distance between
the sections.
On split-system applications, the piping layout is determined by the location of the indoor and outdoor units and by the building
structure. Pipe runs should be minimised
in order to reduce the pressure drops in
the refrigerant circuit and the refrigerant
charge required. The maximum allowable pipe length is 30 meters. Should your
requirements exceed the limits described
above, please contact our application engineers who will be delighted to assist.
Condensing unit installed at a higher
level than the evaporation section
On the rising vertical pipes, oil traps should
be fitted every 6 metres to ensure that the
oil does not run back to the compressor
by gravity and that it continues to circulate in the correct direction. On horizontal
suction pipelines a minimum of 1% slope
in the direction of flow should be provided
in order to ensure the oil flow back to the
compressor. Required pipeline diameters
for various unit sizes and pipe run lengths
can be found in the following table.
be provided in order to ensure the oil flow
back to the compressor.
The refrigerant line diameters are determined from the selected unit size and the distance between the indoor and the outdoor
unit. The table below provides the recommended sizes for various combinations.
Condensing unit installed at a lower
level than the evaporation section
Install a liquid trap on the suction line at
the evaporator outlet and at the same
height in order that liquid refrigerant,
when the system is off, will not fall back
to the compressor. Locate this trap downstream from the bulb of the thermostatic
valve to ensure that when the compressor
is restarted, the rapid evaporation of the
refrigerant liquid fluid in the trap will not
affect the bulb of the thermostatic valve.
On horizontal suction pipelines a minimum
of 1% slope in the direction of flow should
135
www.hidros.it
WDA
WDA/EV higher than the remote condenser
WDA
WDA/EV lower than the remote condenser
Refrigerant line diameters for WDA/EV versions
10
Distance (m)
20
30
Mod.
Gas (mm)
Liquid (mm)
Gas (mm)
Liquid (mm)
Gas (mm)
Liquid (mm)
039
28
18
22
18
22
18
045
28
22
28
18
22
18
050
28
22
28
22
22
22
060
28
22
28
22
28
22
070
28
28
28
22
28
22
080
35
28
28
28
28
28
090
35
28
35
28
28
28
110
35
28
35
28
35
28
120
35
28
35
28
35
28
130
35
35
35
35
35
35
152
42
35
35
35
35
35
162
42
35
42
35
35
35
190
2x35
2x28
2x35
2x28
2x28
2x28
210
2x35
2x28
2x35
2x28
2x35
2x28
240
2x35
2x28
2x35
2x28
2x35
2x28
260
2x35
2x35
2x35
2x35
2x35
2x35
300
2x42
2x35
2x35
2x35
2x35
2x35
320
2x42
2x35
2x42
2x35
2x35
2x35
Refrigerant charge for liquid line
Liquid line diameter
Refrigerant charge g/m
Liquid line diameter
Refrigerant charge g/m
18
200
22
290
28
500
35
810
Cooling capacity correction factors
Mod.
WDA/EV
Refr. Line 0 mt.
1
Refr. Line = 10 mt.
0,98
136
Refr. Line 20 mt.
0,96
Refr. Line 30 mt.
0,95
WDA
Code
Main switch
–
Flow switch
–
LS low noise versions
LS01
Hydraulic kit A1NT with one pump without tank
A1NT
Partial heat recovery
RP00
Rubber anti-vibration mountings
KAVG
Spring anti-vibration mountings
KAVM
Electronic soft starter
DSSE
Refrigerant circuit pressure gauges
MAML
Liquid line solenoid valve
VSLI
Pressostatic valve kit for cooling versions
VPSF
Remote control panel
PCRL
Serial interface card RS485
INSE
Source 4÷20 mA modulating valve
V2M0
039-080
090-152
162-210
240-320
WDA
Model WDA ÷ WDA/HP ÷ WDR/EV
Standard,
Optional, – Not available.
C
C
B
A
A
B
WDA 039 ÷ 162
WDA 190 ÷ 320
Mod.
A (mm)
B (mm)
C (mm)
Kg
Mod.
A (mm)
B (mm)
C (mm)
Kg
039
045
050
060
070
080
090
110
120
130
1566
1566
1566
1566
1566
1566
1986
1986
1986
1986
1101
1101
1101
1101
1101
1101
1101
1101
1101
1101
1005
1005
1005
1005
1005
1005
1255
1255
1255
1255
430
440
460
470
480
490
580
600
630
650
152
162
190
210
240
260
300
320
1986
1986
1885
1885
1885
1885
1855
1855
1101
1101
2480
2480
2480
2480
2480
2480
1255
1255
800
800
800
800
800
800
730
760
1170
1210
1270
1320
1390
1430
137
www.hidros.it