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PARTIAL HEAT RECOVERY
Compared with the basic confi guration, this option features an additional refrigerant/water
heat exchanger on the compressor discharge line, allowing recovery of 15% of the rejected
heat. This heat exchanger is large enough to recover heat for the production of free hot
water simultaneously with chilled water production. The heating capacity of the heat recovery
circuit is approximately equal to the power input of the compressor.
Typical heat recovery applications can be facilities with high domestic hot water usage,
such as health care, hotels, etc.
Notes:
This option is available on cooling only and heat-pump versions.
Heat recovery can only occur when the unit is running either in cooling or heating mode.
Partial heat recovery
Recovery
(kW)
NAC/NAH 200
NAC/NAH 230
NAC/NAH 270
NAC/NAH 300
NAC 340
NAC 380
NAC 420
NAC 480
NAC 540
NAC 600
NAC 640
Wf :
Water fl ow in m
3
per hour
Application Guide /NEOSYS-AGU-1801-E
Free hot water up to 70°C
Air cooled condenser
Water in/out: 50/55 °C
Wf
Dp
(m
3
/h)
(kPa)
41
7,18
6,00
52
9,11
9,00
56
9,81
7,00
65
11,39
9,17
79
13,84
9,80
101
17,69
14,28
91
15,94
9,17
106
18,57
12,00
143
25,05
15,00
150
26,28
13,00
154
27,07
13,33
Desuperheater
Electronic expansion valve
Water in/out: 55/60 °C
Recovery
Wf
Dp
(kW)
(m
3
/h)
(kPa)
32
5,62
43
7,55
44
7,73
52
9,13
64
11,24
83
14,58
10
73
12,82
86
15,11
118
20,73
11
122
21,43
125
22,07
Dp :
Water pressure drop in KPa
Partial heat recovery
Scroll compressor
Evaporator
Water in/out: 50/60 °C
Recovery
Wf
(kW)
(m
3
/h)
4
37
3,26
6
48
4,22
5
50
4,40
6
59
5,19
6
72
6,34
93
8,18
6
82
7,22
8
96
8,45
129
11,35
9
136
11,97
9
139
12,33
Dp
(kPa)
2
2
2
2
2
3
2
3
4
3
3
• 27 •
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