Pressure -Temperature Chart
Rotation direction of Scroll compressors
KEEP IN MIND
ZSI Low temperature Condensing units 'uses 3-Phase Scroll compressors which can only
compress in one rotational direction. Scroll Compressor can rotate in the wrong direction when start
depending upon phasing of the power. Since there is a 50-50 chance of connecting power in such a way
as to cause rotation in the reverse direction, So, a Single phase preventor must require. Always observe
the rotation of 3 phase Scroll Compressor by measuring Current drawn, Compressor pumping and
running sound.
Maximum Compressor Cycle & Minimum run time
KHZ or ZSI Scroll CDU units- Maximum permitted starts per hour is 10
.
There is no minimum off time because Scroll compressors start unloaded even if the system has
unbalanced pressures. It is recommended to set minimum 3 mins run time of compressor after it comes
in operation for adequate oil return and if possible, we can set 3 mins off time/Delay time of compressor
once the power supply is disconnected from circuit to avoid frequent on/off or chattering in Electrical
components.
Note:
The components listed in this catalogue are not released for use with caustic, poisonous or flammable
substances.
Emerson Climate Technologies cannot be held responsible for any damage caused by using these
substances.
Temperature
Refrigerant
°F
°C
R-22
R-410a
R-407c
R-134a
R-404a
3
-16.1
26.5
52.2
21.2
8.0
36.7
4
-15.6
27.4
53.6
22.0
8.6
37.7
5
-15.0
28.3
55.0
22.8
9.1
38.8
6
-14.4
29.1
56.4
23.7
9.7
39.8
7
-13.9
30.0
57.9
24.5
10.2
40.9
8
-13.3
31.0
59.3
25.4
10.2
40.9
9
-12.8
31.9
60.8
26.2
11.4
43.1
10
-12.2
32.8
62.3
27.1
12.0
44.3
11
-11.7
33.8
63.9
28.0
12.6
45.4
12
-11.1
34.8
65.4
29.0
13.2
46.6
13
-10.6
35.8
67.0
29.9
13.8
47.8
14
-10.0
36.8
68.6
30.9
14.4
49.0
15
-9.4
37.8
70.2
31.8
15.1
50.2
16
-8.9
38.8
71.9
32.8
15.7
51.5
17
-8.3
39.9
73.5
33.8
16.4
52.7
18
-7.8
40.9
75.2
34.8
17.1
54.0
19
-7.2
42.0
77.0
35.9
17.7
55.3
20
-6.7
43.1
78.7
36.9
18.4
56.6
21
-6.1
44.2
80.5
38.0
19.2
57.9
22
-5.6
45.3
82.3
39.1
19.9
59.3
23
-5.0
46.5
84.1
40.2
20.6
60.6
24
-4.4
47.6
85.9
41.3
21.4
62.0
25
-3.9
48.8
87.8
42.4
22.1
63.4
26
-3.9
48.8
87.8
43.6
22.9
64.8
27
-2.8
51.2
91.6
44.7
23.7
66.2
28
-2.2
52.4
93.5
45.9
24.5
67.7
Temperature
Refrigerant
°F
°C
R-22
R-410a
R-407c
R-134a
R-404a
29
1.7
53.7
95.5
47.1
25.3
69.2
30
-1.1
54.9
97.5
48.4
26.1
70.7
31
-0.6
56.2
99.5
49.6
26.9
72.1
32
0.0
57.5
101.6
50.9
27.8
73.8
33
0.6
58.8
103.6
52.1
28.6
75.3
34
1.1
60.2
105.7
53.4
29.5
76.9
35
1.7
61.5
107.9
54.8
30.4
78.5
36
2.2
62.9
110.0
56.1
31.3
80.2
37
2.8
64.3
112.2
57.5
32.2
81.7
38
3.3
65.7
114.4
58.9
33.1
83.5
39
3.9
67.1
116.7
60.3
34.1
85.2
40
4.4
68.6
118.9
61.7
35.0
86.9
41
5.0
70.0
121.2
63.1
36.0
88.6
42
5.6
71.5
123.6
64.6
37.0
90.4
43
6.1
73.0
125.9
66.1
38.0
92.2
44
6.7
74.5
128.3
67.6
39.0
94.0
45
7.2
76.1
130.7
69.1
40.0
95.8
46
7.8
77.6
133.2
70.6
41.1
97.6
47
8.3
79.2
135.6
72.2
42.2
99.5
48
8.9
80.8
138.2
73.8
43.2
101.4
49
9.4
82.4
140.7
75.4
44.3
103.3
50
10.0
84.1
143.3
77.1
45.4
105.3
55
12.8
92.6
156.6
106.0
51.2
115.3
60
15.6
101.6
170.7
116.2
57.4
126.0
65
18.3
111.3
185.7
127.0
64.0
137.4
20
Содержание KHZ506
Страница 1: ...ZSI Scroll Condensing Units User Manual ...
Страница 15: ...10 Wiring Diagram 2 Fans Unit 13 ...
Страница 16: ...Wiring Diagram Single Fan Unit 14 ...
