EVI High efficiency HYBRID heat pumps with EVI

LWZ
High efficiency HYBRID heat pumps
with E.V.I compressor
A+
LWZ
-15°C
-20°C
+63°C
+43°C
+65°C
+43°C
E.V.I.
C.O.P.≥4,1
FLOATING
FRAME
FLOATING
FRAME
FLOATING FRAME
FLOATING
FRAME
FLOATING
FRAME
FLOATING FRAME
The LWZ series of high efficiency hybrid heat pumps has
been specifically designed for use with radiant floor heating
systems or those applications where it is necessary to have
maximum efficiency when heating.
They have been optimized on heating mode, are able to
produce water up to 65°C and can operate down to -20°C
ambient temperature. LWZ units are available in 2 or 4 pipe
(SW6) versions. Both versions can produce domestic hot water, in the standard LWZ through the activation of an external
3-way-valve and in the SW6 version by means of a separate heat exchanger and hydraulic circuit for the domestic hot
water. All models are supplied as standard with a reversing
valve for defrost and cold water production in summer.
The main feature of LWZ units is that they have TWO heat
exchangers on the source side (one air source, finned coil
and the other a water plate type heat exchanger).
The unit is primarily an air source heat pump but both source
exchangers will work in series at low ambient conditions to
maximise the operating efficiency of the unit. The COP will
be superior to a standard air source heat pump.
60
VERSIONS
HH
RV
XL
NN
P2U
P2S
P4U
P4S
Heating only.
Reversible heating/cooling.
Super low noise.
Ultra low noise.
2 pipe systems without domestic hot water production.
2 pipe systems with domestic hot water production by
external 3 way valve.
4 pipe systems heating/cooling.
2+2 pipe systems with domestic hot water production.
ACCESSORIES
A1NT
A1ZZ
A2NT
A2ZZ
DSSE
INSE
KAVG
KP
PCRL
RAEV
SGRS
SODP
VECC
VECE
VTEE
Hydraulic kit with one pump without tank.
Hydraulic kit with tank and one pump.
Hydraulic kit with two pump without tank.
Hydraulic kit with tank and two pump.
Electronic soft starter.
Serial interface card RS 485.
Rubber anti-vibration mountings.
Hydraulic circuit antifreeze kit.
Remote control panel.
User and recovery heat exchanger antifreeze kit.
Cascade control system via RS485.
Unit performance optimizer.
High static pressure E.C. fans.
E.C. fans.
Electronic thermostatic valve.
A+
252
302
452
Energy Class in low temperature - According to EU reg. 811/2013
A+
A+
A+
Energy Class in high temperature - According to EU reg. 811/2013
A+
A+
A+
Heating capacity (EN14511) (1)
kW
16,6
21,2
27,5
Total input power (EN14511)(1)
kW
6,1
7,7
9,9
COP (EN14511) (1)
W/W
2,71
2,75
2,78
Heating capacity (EN14511) (2)
kW
17,5
22,3
28,9
Total input power (EN14511)(2)
kW
5,6
7,1
9,1
COP (EN14511) (2)
W/W
3,12
3,14
3,17
Integration water supply
l/h
950
1200
1500
Power supply
V/Ph/Hz 400/3+N/50 400/3+N/50 400/3/50
Max input current standard unit
A
20,5
24,1
34,1
Peak current standard unit
A
62,9
83,2
119,1
Peak current standard unit with soft starter (optional)
A
37,2
48,2
68,6
Max air flow in heating mode
m3/h
10000
10000
16000
Fans
n°
2
2
1
Compressors / Circuits
n°/n°
2/1
2/1
2/1
Max sound power level in heating mode (5)
dB (A)
70
70
72
Max sound pressure level in heating mode (6)
dB (A)
42
42
44
(XL/RV) Super low noise - Reversible version
252
302
452
Energy Class in low temperature - According to EU reg. 811/2013
A+
A+
A+
Energy Class in high temperature - According to EU reg. 811/2013
A+
A+
A+
Heating capacity (EN14511) (1)
kW
16,6
21,2
27,5
Total input power (EN14511)(1)
kW
6,1
7,7
9,9
(1)
COP (EN14511)
W/W
2,71
2,75
2,78
Heating capacity (EN14511) (2)
kW
17,5
22,3
28,9
Total input power (EN14511)(2)
kW
5,6
7,1
9,1
COP (EN14511) (2)
W/W
3,12
3,14
3,17
Integration water supply
l/h
950
1200
1500
(3)
kW
Cooling capacity (EN14511)
22,4
27,7
36,7
kW
Total input power (EN14511)(3)
7,3
9,1
11,9
W/W
EER (EN14511) (3)
3,06
3,05
3,07
Cooling capacity (EN14511) (4)
kW
23,5
29,1
38,5
Total input power (EN14511)(4)
kW
7,0
8,7
11,4
(4)
EER (EN14511)
W/W
3,37
3,36
3,38
Integration water supply
l/h
950
1200
1500
V/Ph/Hz 400/3+N/50 400/3+N/50 400/3/50
Power supply
A
Max input current standard unit
20,5
24,1
34,1
A
Peak current standard unit
62,9
83,2
119,1
A
Peak current standard unit with soft starter (optional)
37,2
48,2
68,6
3
m /h
10000
10000
16000
Max air flow in heating mode
m3/h
10000
10000
16000
Max air flow in cooling mode
n°
2
2
1
Fans
Compressors / Circuits
n°/n°
2/1
2/1
2/1
dB (A)
70
70
72
Max sound power level in heating mode (5)
(6)
dB (A)
42
42
44
Max sound pressure level in heating mode
dB (A)
70
70
72
Max sound power level in cooling mode (5)
dB (A)
42
42
44
Max sound pressure level in cooling mode (6)
502
602
752
852
A+
A+
34,2
12,1
2,82
35,9
11,2
3,21
1900
400/3/50
39,3
148,7
84,7
16000
1
2/1
72
44
A+
A+
41,9
15,2
2,76
44,0
13,9
3,17
2300
400/3/50
46,2
143,2
84,2
32000
2
2/1
74
46
A+
A+
48,3
17,2
2,80
50,7
15,7
3,22
2700
400/3/50
56,2
170,2
100,2
32000
2
2/1
74
46
A+
A+
53,5
19,9
2,68
56,1
18,2
3,08
2900
400/3/50
69,2
210,7
123,7
32000
2
2/1
74
46
502
602
752
852
A+
A+
34,2
12,1
2,82
35,9
11,2
3,21
1900
46,2
15,1
3,05
48,5
14,5
3,36
1900
400/3/50
39,3
148,7
84,7
16000
16000
1
2/1
72
44
72
44
A+
A+
41,9
15,2
2,76
44,0
13,9
3,17
2300
54,7
17,8
3,07
57,4
17,0
3,38
2300
400/3/50
46,2
143,2
84,2
32000
32000
2
2/1
74
46
74
46
A+
A+
48,3
17,2
2,80
50,7
15,7
3,22
2700
62,8
20,6
3,05
65,9
19,7
3,36
2700
400/3/50
56,2
170,2
100,2
32000
32000
2
2/1
74
46
74
46
A+
A+
53,5
19,9
2,68
56,1
18,2
3,08
2900
71,0
23,2
3,05
74,6
22,2
3,36
2900
400/3/50
69,2
210,7
123,7
32000
32000
2
2/1
74
46
74
46
LWZ
(XL/HH) Super low noise - Heating only version
Performance refer to the following conditions:
(1)Heating: Ambient temperature -7°C DB, -8°C WB, water outlet temperature 35°C. Integrative source heat exchenger not activated.
(2)Heating: Ambient temperature -7°C DB, -8°C WB, water outlet temperature 35°C. Integrative source heat exchenger activated.
(3)Cooling (RV versions Only): ambient temperature 35°C, water temperature 12/7°C. Integrative source heat exchenger not activated. (4)Cooling (RV versions Only): ambient temperature 35°C, water temperature 12/7°C. Integrative source heat exchenger activated.
(5)Sound power level in accordance with ISO 9614.
(6)Sound pressure level at 10 mt from the unit in free field conditions direction factor Q=2, calculated in accordance with ISO 9614.
61
www.hidros.eu
LWZ
(XL/HH) Super low noise - Heating only version
Energy Class in low temperature - According to EU reg. 811/2013
Energy Class in high temperature - According to EU reg. 811/2013
Heating capacity (EN14511) (1)
kW
Total input power (EN14511)(1)
kW
COP (EN14511) (1)
W/W
Heating capacity (EN14511) (2)
kW
Total input power (EN14511)(2)
kW
COP (EN14511) (2)
W/W
Integration water supply
l/h
Power supply
V/Ph/Hz
Max input current standard unit
A
Peak current standard unit
A
Peak current standard unit with soft starter (optional)
A
Max air flow in heating mode
m3/h
Fans
n°
Compressors / Circuits
n°/n°
Max sound power level in heating mode (5)
dB (A)
Max sound pressure level in heating mode (6)
dB (A)
(XL/RV) Super low noise - Reversible version
Energy Class in low temperature - According to EU reg. 811/2013
Energy Class in high temperature - According to EU reg. 811/2013
Heating capacity (EN14511) (1)
kW
(1)
Total input power (EN14511)
kW
COP (EN14511) (1)
W/W
Heating capacity (EN14511) (2)
kW
Total input power (EN14511)(2)
kW
COP (EN14511) (2)
W/W
Integration water supply
l/h
(3)
kW
Cooling capacity (EN14511)
kW
Total input power (EN14511)(3)
W/W
EER (EN14511) (3)
Cooling capacity (EN14511) (4)
kW
Total input power (EN14511)(4)
kW
EER (EN14511) (4)
W/W
Integration water supply
l/h
V/Ph/Hz
Power supply
A
Max input current standard unit
A
Peak current standard unit
A
Peak current standard unit with soft starter (optional)
m 3/h
Max air flow in heating mode
m3/h
Max air flow in cooling mode
n°
Fans
Compressors / Circuits
n°/n°
dB (A)
Max sound power level in heating mode (5)
(6)
dB (A)
Max sound pressure level in heating mode
dB (A)
Max sound power level in cooling mode (5)
dB (A)
Max sound pressure level in cooling mode (6)
1002
1202
1504
1704
2004
2404
A+
A+
61,0
23,0
2,65
64,0
21,0
3,05
3300
400/3/50
74,0
215,0
128,0
38000
2
2/1
79
51
A+
A+
72,3
26,5
2,73
75,9
24,2
3,14
4000
400/3/50
79,0
225,0
138,0
38000
2
2/1
79
51
A++
A+
99,2
34,9
2,84
104,1
31,9
3,27
5400
400/3/50
112,4
228,0
132,0
48000
4
4/2
77
49
A++
A+
106,3
38,1
2,79
111,6
34,8
3,21
5800
400/3/50
138,4
282,0
170,0
56000
4
4/2
79
51
A+
A+
120,9
42,6
2,84
127,0
38,9
3,27
6600
400/3/50
148,0
287,0
175,0
70000
6
4/2
80
52
A+
A+
138,5
50,2
2,76
145,4
45,8
3,17
7600
400/3/50
158,0
318,0
190,0
70000
6
4/2
80
52
1002
1202
1504
1704
2004
2404
A+
A+
61,0
23,0
2,65
64,0
21,0
3,05
3300
79,4
26,9
2,95
83,4
25,7
3,25
3300
400/3/50
74,0
215,0
128,0
38000
38000
2
2/1
79
51
79
51
A+
A+
72,3
26,5
2,73
75,9
24,2
3,14
4000
90,0
30,7
2,93
94,5
29,3
3,22
4000
400/3/50
79,0
225,0
138,0
38000
38000
2
2/1
79
51
79
51
A++
A+
99,2
34,9
2,84
104,1
31,9
3,27
5400
126,0
41,8
3,01
132,3
40,0
3,31
5400
400/3/50
112,4
228,0
132,0
48000
48000
4
4/2
77
49
77
49
A++
A+
106,3
38,1
2,79
111,6
34,8
3,21
5800
140,0
49,1
2,85
147,0
46,9
3,14
5800
400/3/50
138,4
282,0
170,0
56000
56000
4
4/2
79
51
79
51
A+
A+
120,9
42,6
2,84
127,0
38,9
3,27
6600
165,0
52,5
3,14
173,3
50,2
3,45
6600
400/3/50
148,0
287,0
175,0
70000
70000
6
4/2
80
52
80
52
A+
A+
138,5
50,2
2,76
145,4
45,8
3,17
7600
186,0
64,1
2,90
195,3
61,2
3,19
7600
400/3/50
158,0
318,0
190,0
70000
70000
6
4/2
80
52
80
52
Performance refer to the following conditions:
(1)Heating: Ambient temperature -7°C DB, -8°C WB, water outlet temperature 35°C. Integrative source heat exchenger not activated.
(2)Heating: Ambient temperature -7°C DB, -8°C WB, water outlet temperature 35°C. Integrative source heat exchenger activated.
(3)Cooling (RV versions Only): ambient temperature 35°C, water temperature 12/7°C. Integrative source heat exchenger not activated. (4)Cooling (RV versions Only): ambient temperature 35°C, water temperature 12/7°C. Integrative source heat exchenger activated.
(5)Sound power level in accordance with ISO 9614.
(6)Sound pressure level at 10 mt from the unit in free field conditions direction factor Q=2, calculated in accordance with ISO 9614.
62
252
302
452
Energy Class in low temperature - According to EU reg. 811/2013
A+
A+
A+
Energy Class in high temperature - According to EU reg. 811/2013
A+
A+
A+
(1)
Heating capacity (EN14511)
kW
15,7
20,0
25,6
Total input power (EN14511)(1)
kW
5,8
7,3
9,3
COP (EN14511) (1)
W/W
2,71
2,72
2,76
Heating capacity (EN14511) (2)
kW
16,5
21,0
26,8
Total input power (EN14511)(2)
kW
5,3
6,8
8,5
(2)
COP (EN14511)
W/W
3,12
3,10
3,15
Integration water supply
l/h
950
1200
1500
Power supply
V/Ph/Hz 400/3+N/50 400/3+N/50 400/3/50
Max input current standard unit
A
20,5
24,1
34,1
Peak current standard unit
A
62,9
83,2
119,1
Peak current standard unit with soft starter (optional)
A
37,2
48,2
68,6
Max air flow in heating mode
m3/h
10000
10000
16000
Fans
n°
2
2
1
Compressors / Circuits
n°/n°
2/1
2/1
2/1
Max sound power level in heating mode (5)
dB (A)
66
66
66
Max sound pressure level in heating mode (6)
dB (A)
38
38
38
(NN/RV) Ultra low noise - Reversible version
252
302
452
502
602
752
852
A+
A+
34,3
11,8
2,90
36,0
10,9
3,31
1900
400/3/50
39,3
148,7
84,7
16000
1
2/1
68
40
A+
A+
38,9
14,0
2,77
40,8
12,8
3,19
2300
400/3/50
46,2
143,2
84,2
32000
2
2/1
68
40
A+
A+
44,6
16,0
2,78
46,8
14,7
3,20
2700
400/3/50
56,2
170,2
100,2
32000
2
2/1
68
40
A+
A+
51,7
18,9
2,74
54,3
17,2
3,15
2900
400/3/50
69,2
210,7
123,7
32000
2
2/1
69
41
502
602
752
852
LWZ
(NN/HH) Ultra low noise - Heating only version
Energy Class in low temperature - According to EU reg. 811/2013
A+
A+
A+
A+
A+
A++
A+
Energy Class in high temperature - According to EU reg. 811/2013
A+
A+
A+
A+
A+
A+
A+
Heating capacity (EN14511) (1)
kW
15,7
20,0
25,6
34,3
38,9
44,6
51,7
Total input power (EN14511)(1)
kW
5,8
7,3
9,3
11,8
14,0
16,0
18,9
COP (EN14511) (1)
W/W
2,71
2,72
2,76
2,90
2,77
2,78
2,74
Heating capacity (EN14511) (2)
kW
16,5
21,0
26,8
36,0
40,8
46,8
54,3
Total input power (EN14511)(2)
kW
5,3
6,8
8,5
10,9
12,8
14,7
17,2
COP (EN14511) (2)
W/W
3,12
3,10
3,15
3,31
3,19
3,20
3,15
Integration water supply
l/h
950
1200
1500
1900
2300
2700
2900
kW
Cooling capacity (EN14511) (3)
21,4
26,5
35,6
45,7
53,5
61,1
69,0
kW
Total input power (EN14511)(3)
8,1
10,5
14,1
16,2
18,6
22,5
22,9
W/W
EER (EN14511) (3)
2,64
2,51
2,52
2,82
2,87
2,71
3,01
Cooling capacity (EN14511) (4)
kW
22,5
27,8
37,4
48,0
56,2
64,2
72,5
Total input power (EN14511)(4)
kW
7,7
10,1
13,5
15,5
17,8
21,5
21,9
(4)
EER (EN14511)
W/W
2,90
2,76
2,77
3,10
3,16
2,98
3,31
Integration water supply
l/h
950
1200
1500
1900
2300
2700
2900
V/Ph/Hz 400/3+N/50 400/3+N/50 400/3+N/50 400/3+N/50 400/3+N/50 400/3+N/50 400/3+N/50
Power supply
A
Max input current standard unit
18,7
22,3
32,5
38,3
43,1
53,2
66,2
A
Peak current standard unit
61,1
81,4
117,5
147,7
140,2
167,2
207,7
A
Peak current standard unit with soft starter (optional)
35,4
46,4
67,1
83,8
81,2
97,2
120,7
m3/h
Max air flow in heating mode
9000
9000
9000
18000
18000
18000
27000
m3/h
Max air flow in cooling mode
9000
9000
9000
18000
18000
18000
27000
n°
Fans
1
1
1
2
2
2
3
Compressors / Circuits
n°/n°
2/1
2/1
2/1
2/1
2/1
2/1
2/1
dB (A)
Max sound power level in heating mode (5)
66
66
66
68
68
68
69
(6)
dB (A)
Max sound pressure level in heating mode
38
38
38
40
40
40
41
dB (A)
Max sound power level in cooling mode (5)
66
66
66
68
68
68
69
dB (A)
Max sound pressure level in cooling mode (6)
38
38
38
40
40
40
41
Performance refer to the following conditions:
(1)Heating: Ambient temperature -7°C DB, -8°C WB, water outlet temperature 35°C. Integrative source heat exchenger not activated.
(2)Heating: Ambient temperature -7°C DB, -8°C WB, water outlet temperature 35°C. Integrative source heat exchenger activated.
(3)Cooling (RV versions Only): ambient temperature 35°C, water temperature 12/7°C. Integrative source heat exchenger not activated. (4)Cooling (RV versions Only): ambient temperature 35°C, water temperature 12/7°C. Integrative source heat exchenger activated.
(5)Sound power level in accordance with ISO 9614.
(6)Sound pressure level at 10 mt from the unit in free field conditions direction factor Q=2, calculated in accordance with ISO 9614.
63
www.hidros.eu
LWZ
(NN/HH) Ultra low noise - Heating only version
Energy Class in low temperature - According to EU reg. 811/2013
Energy Class in high temperature - According to EU reg. 811/2013
Heating capacity (EN14511) (1)
kW
Total input power (EN14511)(1)
kW
COP (EN14511) (1)
W/W
Heating capacity (EN14511) (2)
kW
Total input power (EN14511)(2)
kW
COP (EN14511) (2)
W/W
Integration water supply
l/h
Power supply
V/Ph/Hz
Max input current standard unit
A
Peak current standard unit
A
Peak current standard unit with soft starter (optional)
A
Max air flow in heating mode
m3/h
Fans
n°
Compressors / Circuits
n°/n°
Max sound power level in heating mode (5)
dB (A)
Max sound pressure level in heating mode (6)
dB (A)
(NN/RV) Ultra low noise - Reversible version
Energy Class in low temperature - According to EU reg. 811/2013
Energy Class in high temperature - According to EU reg. 811/2013
kW
Heating capacity (EN14511) (1)
(1)
kW
Total input power (EN14511)
W/W
COP (EN14511) (1)
Heating capacity (EN14511) (2)
kW
Total input power (EN14511)(2)
kW
COP (EN14511) (2)
W/W
Integration water supply
l/h
(3)
kW
Cooling capacity (EN14511)
kW
Total input power (EN14511)(3)
W/W
EER (EN14511) (3)
Cooling capacity (EN14511) (4)
kW
Total input power (EN14511)(4)
kW
EER (EN14511) (4)
W/W
Integration water supply
l/h
V/Ph/Hz
Power supply
A
Max input current standard unit
A
Peak current standard unit
A
Peak current standard unit with soft starter (optional)
m3/h
Max air flow in heating mode
m3/h
Max air flow in cooling mode
n°
Fans
Compressors / Circuits
n°/n°
dB (A)
Max sound power level in heating mode (5)
(6)
dB (A)
Max sound pressure level in heating mode
dB (A)
Max sound power level in cooling mode (5)
dB (A)
Max sound pressure level in cooling mode (6)
1002
1202
1504
1704
2004
2404
A+
A+
60,6
21,1
2,87
63,7
19,3
3,30
3300
400/3/50
74,0
215,0
128,0
38000
2
2/1
69
41
A+
A+
67,6
24,2
2,79
71,0
22,1
3,21
4000
400/3/50
79,0
225,0
138,0
38000
2
2/1
70
42
A++
A+
93,6
34,0
2,75
98,2
31,1
3,16
5400
400/3/50
112,4
228,0
132,0
48000
4
4/2
71
43
A++
A+
108,6
39,8
2,73
114,0
36,3
3,14
5800
400/3/50
138,4
282,0
170,0
56000
4
4/2
72
44
A+
A+
119,7
44,0
2,72
125,6
40,2
3,13
6600
400/3/50
148,0
287,0
175,0
70000
6
4/2
72
44
-------------------
1002
1202
1504
1704
2004
2404
A++
A+
60,6
21,1
2,87
63,7
19,3
3,30
3300
79,3
26,0
3,05
83,3
24,8
3,36
3300
400/3+N/50
68,0
209,0
123,7
27000
27000
3
2/1
69
41
69
41
A++
A+
67,6
24,2
2,79
71,0
22,1
3,21
4000
88,0
32,2
2,73
92,4
30,8
3,00
4000
400/3+N/50
70,0
225,0
138,0
29000
29000
3
2/1
70
42
70
42
A+
A+
93,6
34,0
2,75
98,2
31,1
3,16
5400
120,0
42,1
2,85
126,0
40,2
3,14
5400
400/3+N/50
113,0
228,0
132,0
44000
44000
4
4/2
71
43
71
43
A+
A+
108,6
39,8
2,73
114,0
36,3
3,14
5800
132,0
46,3
2,85
138,6
44,2
3,14
5800
400/3+N/50
136,0
282,0
170,0
48000
48000
6
4/2
72
44
72
44
A+
A+
119,7
44,0
2,72
125,6
40,2
3,13
6600
155,0
58,5
2,65
162,8
55,8
2,92
6600
400/3+N/50
146,0
287,0
175,0
60000
60000
6
4/2
72
44
72
44
-----------------
Performance refer to the following conditions:
(1)Heating: Ambient temperature -7°C DB, -8°C WB, water outlet temperature 35°C. Integrative source heat exchenger not activated.
(2)Heating: Ambient temperature -7°C DB, -8°C WB, water outlet temperature 35°C. Integrative source heat exchenger activated.
(3)Cooling (RV versions Only): ambient temperature 35°C, water temperature 12/7°C. Integrative source heat exchenger not activated. (4)Cooling (RV versions Only): ambient temperature 35°C, water temperature 12/7°C. Integrative source heat exchenger activated.
(5)Sound power level in accordance with ISO 9614.
(6)Sound pressure level at 10 mt from the unit in free field conditions direction factor Q=2, calculated in accordance with ISO 9614.
64
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PRINCIPLE OF OPERATION
The use of the water source heat exchanger only in harsh environmental
conditions, allows the unit to operate with the air source for most of the
time, integrating the power missing with the water but also ensuring an
extreme reduction of water consumption.
The applications of hybrid heat pumps are absolutely interesting in
those cases where supplementary sources of different nature are available at lower cost. The integrated power from the water heat exchanger
to water is about 30% of the power unit, in this way there are not needed
high cost of adduction.
Some water sources used:
- Integrative source through the use of well water
- Integrative source through the use of geothermal
- Integrative source through the use of wastewater
- Integrative source through the use of solar panels.
35 °C
E.V.I.
65 °C
+10 °C
LWZ
-20 °C
PERFORMANCE COMPARISON C.O.P. IN HYBRID WWZ UNITS AND IN LZT UNIT.
6
The graph shows the evolution of LWZ units C.O.P. (curves A, B, C)
at different external temperatures (with user water produced at 35 °C),
compared to a unit of equal power series LZT (curve D).
The curves A, B, C refer to different conditions of the water source and,
in particular:
Curve A: 10/7 °C, Curve B: 3/0 °C, Curve C: 0/-3 °C. As can be seen
the performance difference is always increased with decreasing outdoor
temperature to fit to the maximum value in correspondence of -20°C
outside.
C.O.P.
5
A
4
C
B
3
D
2
1
-20
-15
-10
-5
0
5
10
15
°C
20
OPERATION LIMITS
(RV versions Only)
Water temp. production (°C)
Water temp. production (°C)
(All versions)
70
60
50
40
30
20
30
20
10
0
-10
- 20
- 10
0
10
20
30
40
50
-20
Ambient temperature (°C)
- 20
- 10
0
10
20
30
40
50
Ambient temperature (°C)
Heating mode
Cooling with head pressure control and glycol
Cooling with head pressure control
Cooling with head pressure control and glycol
Cooling with head pressure control
65
www.hidros.eu
LWZ
FRAME
All 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 RAL9018.
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. The
refrigerant circuit includes: sight glass, filter
drier, two thermal expansion valves (one for
cooling mode, one for heating mode) with
external equalizer, 4 way reversing valve,
check valves, liquid receiver, Schrader
valves for maintenance and control, pressure safety device (for compliance with
PED regulations). The circuit also includes
an AISI316 stainless steel heat exchanger
that is used as an economizer plus an additional expansion valve for refrigerant vapour injection.
COMPRESSORS
Units use scroll compressors that are
equipped with E.V.I. technology, a versatile
method of improving system capacity and
efficiency. E.V.I. stands for “Enhanced Vapour Injection.” The technology involves injecting refrigerant vapour into the middle of
the compression process, a procedure that
significantly boosts capacity and efficiency.
Each scroll compressor used in these units
is similar to a two-stage compressor with
built-in inter-stage cooling. The process begins when a portion of the condenser liquid
is extracted and expanded through an expansion valve. The low temperature liquid/
gas mixture produced is injected into a heat
exchanger that operates as a sub cooler.
Any liquid is evaporated and the vapour
produced is superheated.
The superheated vapour is then injected
into an intermediate port in the scroll compressor. This cold vapour reduces the
temperature of the compressed gas thus
enabling the compressor to raise the pressure to levels (and temperatures) beyond
that possible with a single stage scroll. The
additional sub cooling of the main volume
of liquid refrigerant increases the evaporator capacity. This compressor technology
generates a larger pressure ratio between
condensing and evaporating pressures,
with significant performance improvement.
In all units the compressors are connected
in tandem. The compressors are all supplied with a crankcase heater and thermal
overload protection by a klixon embedded
in the motor winding. They are mounted in
a separate enclosure in order to be separated from the air stream thus enabling
them to be maintained even if the unit is
operating. Access to this enclosure is by
the front panel of the unit. The crankcase
heater is always powered when the compressor is in stand-by.
SOURCE HEAT EXCHANGER
The source heat exchanger is made from
3/8” copper pipes and 0,1mm thick aluminium fins with the tubes being mechanically
expanded into the aluminium fins in order
to maximise heat transfer. Furthermore, the
design guarantees a low air side pressure
drop thus enabling the use of low rotation
speed (and hence low noise) fans.
User heat exchangers + integration
The user heat exchanger is a braze welded,
plate type heat exchanger, manufactured
from AISI 316 stainless steel. The use of
this type of exchanger results in a massive
reduction of the refrigerant charge of the
unit compared to a traditional shell-in-tube
type. A further advantage is a reduction in
the overall dimensions of the unit.
The exchangers are factory insulated with
flexible close cell material and can be fitted with an antifreeze heater (accessory).
Each exchanger is fitted with a temperature
sensor on the discharge water side for antifreeze protection.
Fans
The fans are direct drive axial type with aluminium aerofoil blades, are statically and
dynamically balanced and are supplied
complete with a safety fan guard complying
with the requirements of EN 60335. They
are fixed to the unit frame via rubber antivi- bration mountings. The electric motors
are 8 poles type rotating at approximately
900 rpm. In the NN versions the fans are 12
poles type (approx 450 rpm). As standard, all
66
units are fitted with a pressure operated fan
speed controller. The motors are fitted with
integrated thermal overload protection and
have a moisture protection rating of IP 54.
Microprocessors
All 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 (For multiple
compressors), alarm reset. The control
panel is supplied with display showing all
operational icons. The microprocessor is
set for automatic defrost (when operating
in severe ambient conditions) and for summer/ winter change over.
The control also manages the anti-legionella program, the integration with other heating sources (electric heaters, boilers, solar
panels etc), the operation of a three port
modulating valve (for diverting to DHW or
heating) and both the heating circuit pump
and the domestic hot water circuit pump. 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.
ELECTRIC 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, 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), thermal overloads (protection of
pumps and 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.
Control and protection devices
All units are supplied with the following
domestic hot water circuit (only versions
P4S and P4U) is already equipped with this
probe, but it must be installed in the user
circuit.
Noise Reduction
All units are supplied, as standard, with
the latest ‘Floating Frame’ technology
that completely isolates the compressors
from the main casing, thereby eliminating
vibration and noise from this source. The
‘Floating Frame’ is a special vibration and
acoustic damping system that consists of
a base plate and acoustic enclosure that
houses the compressors. The base plate is
separated from the supporting frame of the
unit by soft steel springs that have a high
damping power. Within the enclosure, the
compressors are mounted on rubber shock
absorbers on the floating base plate. The
enclosure is manufactured from galvanized
steel sandwich panels that have a microperforated inner skin and a core of 50 mm
thick, high density (40 kg/m3) mineral wool.
The entire arrangement provides a double
damping system and acoustic attenuation.
The compressor refrigerant pipes are connected to the ‘fridge circuit via “anaconda”
flexible connections. Flexible connections
are also used on the water pipework within
the unit. The combination of these systems
results in an overall noise reduction in the
region of 10-12 dB(A).
LWZ
controls and protections: user water return
temperature sensor, antifreeze protection
temperature sensor installed on users water output, domestic hot water supply and
return temperature sensors (only versions
SW6), high pressure manual reset, low
pressure automatic reset, compressor thermal protection, air fan, thermal protection,
pressure transducer (used to optimize the
defrost cycle and to adjust the fan speed
depending on ambient conditions), flow
switch. All units are also fitted with a temperature probe sensor with “Energy Saving”
function, supplied in a separate plastic box,
which can be used to stop the pump use
during periods of stand-by, when the water
temperature reaches the set point. Doing
this the power consumption of the unit is
strongly reduced. The probe sensor must
be positioned in the hydraulic compensator present at the screening technique. The
VERSIONS
HH heating only versions are available in the P2U, P2S and P4S configuration only.
VERSION P2U
This is a two pipe version that can produce hot water for heating (HH heating only) and hot
or cold water in the RV version. The RV is used with two pipe water based change-over systems. It is not able to produce domestic hot water.
VERSION P2S
This is a two pipe version that can, in addition to producing hot water for heating (HH version) and hot and cold water in the RV version can also generate domestic hot water. The
controller has dual heating set points (heating and DHW) and can also control a three port
diverting valve that directs the DHW to the cylinder. DHW production has priority irrespective
of the mode of operation of the unit. The unit is normally used with two pipe water based
change-over systems.
VERSION P4S
This is a four pipe version that can produce hot water for heating (HH version), hot and cold
water for cooling and domestic hot water (only RV versions) in all operational modes using
an independent water circuit. When cooling, DHW generation is by heat recovery. This unit
is normally used with two pipe water based change-over systems with the DHW circuit being
separate.
Version P4U
This is a four pipe version that provides a modern approach to four pipe water based systems. Instead of using a boiler and chiller, this unit can generate hot water in one circuit,
cold water in the other circuit either individually or simultaneously. When operating in simultaneous mode the heating capacity is equal to the cooling duty plus the power input to the
compressors. The operating efficiency in this mode is extremely high. Domestic hot water
production for this version is not available.
67
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www.hidros.eu
LWZ Options
Code
252
302
–
–
–
–
–
–
452
502
602
752
852
1002
Flow switch
User water strainer
Evap/cond.press. control by transducer and fan speed control
DCCF
Fresh air temperature probe for set-point compensation
SOND
Specific software for operation priorities
Remote ON/OFF digital input
LWZ
Summer/Winter digital input
Floating frame technology
XL/NN
Condensate discharge drip tray with antifreeze heater
BRCA
E.C. fans (NN versions)
VECE
E.C. fans (XL versions)
VECE
High static pressure E.C. fans
VECC
Cascade control system via RS485
SGRS
Unit performance optimizer
SODP
Hydraulic kit with one pump with tank - user circuit
A1ZZU
Hydraulic kit with two pumps with tank - user circuit
A2ZZU
Hydraulic kit with one pump without tank - user circuit
A1NTU
Hydraulic kit with two pumps without tank - user circuit
A2NTU
Hydraulic kit with one pump without tank - recovery circuit
A1NTR
Hydraulic kit with two pumps without tank - recovery circuit
User and recovery heat exchanger antifreeze kit
A2NTR
RAEV2/4
Rubber anti-vibration mountings
KAVG
Hydraulic circuit antifreeze kit
KP
Electronic Soft starter
DSSE
Remote control panel
PCRL
Serial interface card RS485 with MODBUS protocol
INSE
Electronic thermostatic valve
VTEE
Standard,
F1
F2
C
B
F3
A
F4
C
C
B
A
A
Frame XL Version
Mod.
Frame
Fans
252/XL
302/XL
452/XL
502/XL
602/XL
752/XL
852/XL
1002/XL
1202/XL
F1
F1
F2
F2
F3
F3
F3
F3
F3
2
2
1
1
2
2
2
2
2
Frame NN Version
A (mm) B (mm) C (mm)
1470
1470
1820
1820
1820
1820
1820
1820
1820
1900
1900
2200
2200
2900
2900
2900
2900
2900
C
B
B
A
Optional, – Not available.
880
880
1150
1150
1150
1150
1150
1150
1150
Kg
Mod.
Frame
Fans
330
340
450
490
700
760
810
850
880
252/NN
302/NN
452/NN
502/NN
602/NN
752/NN
852/NN
1002/NN
1202/NN
F2
F2
F2
F3
F3
F3
F4
F4
F4
1
1
1
2
2
2
3
3
3
68
A (mm) B (mm) C (mm)
1820
1820
1820
1820
1820
1820
1820
1820
1820
2200
2200
2200
2900
2900
2900
3900
3900
3900
1150
1150
1150
1150
1150
1150
1150
1150
1150
Kg
430
450
470
700
760
790
1050
1140
1170
LWZ Options
Code
1202
1504
1704
2004
2404
Flow switch
User water strainer
Evap/cond.press. control by transducer and fan speed control
DCCF
Fresh air temperature probe for set-point compensation
SOND
Specific software for operation priorities
Remote ON/OFF digital input
Floating frame technology
XL/NN
Condensate discharge drip tray with antifreeze heater
BRCA
E.C. fans (NN versions)
VECE
LWZ
Summer/Winter digital input
E.C. fans (XL versions)
VECE
High static pressure E.C. fans
VECC
Cascade control system via RS485
SGRS
Unit performance optimizer
SODP
Hydraulic kit with one pump with tank - user circuit
A1ZZU
Hydraulic kit with two pumps with tank - user circuit
A2ZZU
Hydraulic kit with one pump without tank - user circuit
A1NTU
Hydraulic kit with two pumps without tank - user circuit
A2NTU
Hydraulic kit with one pump without tank - recovery circuit
A1NTR
Hydraulic kit with two pumps without tank - recovery circuit
A2NTR
User and recovery heat exchanger antifreeze kit
RAEV2/4
Rubber anti-vibration mountings
KAVG
Hydraulic circuit antifreeze kit
KP
Electronic Soft starter
DSSE
Remote control panel
PCRL
Serial interface card RS485 with MODBUS protocol
INSE
Electronic thermostatic valve
VTEE
Standard,
F5
Optional, – Not available.
F6
C
B
C
B
A
A
Frame XL Version
Mod.
Frame
Fans
1504/XL
1704/XL
2004/XL
2404/XL
F5
F5
F6
F6
4
4
6
6
Frame NN Version
A (mm) B (mm) C (mm)
1820
1820
1820
1820
2900
2900
3900
3900
2300
2300
2300
2300
Kg
Mod.
Frame
Fans
2480
2530
2720
2760
1504/NN
1704/NN
2004/NN
2404/NN
F5
F6
F6
--
4
6
6
--
69
A (mm) B (mm) C (mm)
1820
1820
1820
--
2900
3900
3900
--
2300
2300
2300
--
Kg
2480
2690
2720
--
www.hidros.eu
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