? Cooling capacity %
Versions
NRA 2000
NRA 2200
NRA 2500
NRA 2800
NRA 3000
NRA 3300
NRA 3600
? Input power %
Versions
NRA 2000
NRA 2200
NRA 2500
NRA 2800
NRA 3000
NRA 3300
NRA 3600
E Heating capacity %
Versions
NRA 2000 H
NRA 2200 H
NRA 2500 H
NRA 2800 H
NRA 3000 H
NRA 3300 H
NRA 3600 H
? Input power %
Versions
NRA 2000
NRA 2200
NRA 2500
NRA 2800
NRA 3000
NRA 3300
NRA 3600
KEY
The per formance r efer s t o the
following conditions:
? processed water temperature =
7°C; outside air temperature =
35°C.
E processed water temperature =
50°C; outside air temperature =
7°C B.S. - 6°C B.U.
26
CAPACITY CONTROL
13
Levels of power
1°
2°
3°
4°
15
30
45
60
15
30
45
60
15
30
45
60
11.5
23
34.5
46
9
18
27
36
9
18
27
36
9
18
27
36
Levels of power
1°
2°
3°
4°
11
22
32.5
43
11
22
32.5
43
11
22
32.5
43
7.5
15
22.5
30
5.5
11
19
27
5.5
11
19
27
5.5
11
19
27
Levels of power
1°
2°
3°
4°
14
28
41.5
55
14
28
41.5
55
14
28
41.5
55
11
22
32.5
43
8.5
17
25
33
8.5
17
25
33
8.5
17
25
33
Levels of power
1°
2°
3°
4°
11
22
32.5
43
11
22
32.5
43
11
22
32.5
43
7.5
15
22.5
30
5.5
11
19
27
5.5
11
19
27
5.5
11
19
27
WARNING
As can be seen from the table, in choke
mode the reduction of the input power is
greater than the reduction of the output
power, hence obtaining an E.E.R. greater
than that in full load operation.
This is because, in capacity control mode,
the machine has the heat exchangers
"oversized" in relation to the respective
5°
6°
7°
8°
70
80
90
100
70
80
90
100
70
80
90
100
54.5
63
72.5
82
44
52
61
70
44
52
61
70
44
52
61
70
5°
6°
7°
8°
57.5
72
86
100
57.5
72
86
100
57.5
72
86
100
42.5
55
66.5
78
35.5
44
53.5
63
35.5
44
53.5
63
35.5
44
53.5
63
5°
6°
7°
8°
66.5
78
89
100
66.5
78
89
100
66.5
78
89
100
52.5
62
71.5
81
41.5
50
59
68
41.5
50
59
68
41.5
50
59
68
5°
6°
7°
8°
57.5
72
86
100
57.5
72
86
100
57.5
72
86
100
42.5
55
66.5
78
35.5
44
53.5
63
35.5
44
53.5
63
35.5
44
53.5
63
refrigerant capacities, thus allowing a
greater energy efficiency.
For this reason, this series of devices is
especially suitable for reducing energy
consumption with variable load (typical of
the comfort applications).
9°
10°
11°
12°
91
100
77.5
85
92.5
100
77.5
85
92.5
100
77.5
85
92.5
100
9°
10°
11°
12°
89
100
72
81
90.5
100
72
81
90.5
100
72
81
90.5
100
9°
10°
11°
12°
90.5
100
76
84
92
100
76
84
92
100
76
84
92
100
9°
10°
11°
12°
89
100
72
81
90.5
100
72
81
90.5
100
72
81
90.5
100