AC-SVX001A-EN
37
Low Evaporator Refrigerant
Cutout, Glycol Requirements
The table below shows the low evaporator temperature
cutout for different glycol levels. Additional glycol
beyond the recommendations will adversely effect unit
performance. The unit efficiency will be reduced and
the saturated evaporator temperature will be reduced.
For some operating conditions this effect can be
significant.
additional glycol is used, then use the actual percent
glycol to establish the low refrigerant cutout setpoint.
N
No
otte
e:: Table below is not a substitute for full unit
simulation for proper prediction of unit
performance for specific operating conditions.
For information on specific conditions, contact
Trane product support.
Table 12.
Low evaporator refrigerant temperature cutout (LERTC) and low water temperature cutout (LWTC)
Ethylene Glycol
Propylene Glycol
Glycol
Percentage
(%)
Solution
Freeze Point
(°F)
Minimum
Recommended
LERTC (°F)
Minimum
Recommended
LWTC (°F)
Glycol
Percentage
(%)
Solution
Freeze Point
(°F)
Minimum
Recommended
LERTC (°F)
Minimum
Recommended
LWTC (°F)
0
32
28.6
35
0
32
28.6
35
2
31
27.6
34
2
31
27.6
34
4
29.7
26.3
32.7
4
29.9
26.5
32.9
5
29
25.6
32
5
29.3
25.9
32.3
6
28.3
24.9
31.3
6
28.7
25.3
31.7
8
26.9
23.5
29.9
8
27.6
24.2
30.6
10
25.5
22.1
28.5
10
26.4
23
29.4
12
23.9
20.5
26.9
12
25.1
21.7
28.1
14
22.3
18.9
25.3
14
23.8
20.4
26.8
15
21.5
18.1
24.5
15
23.1
19.7
26.1
16
20.6
17.2
23.6
16
22.4
19
25.4
18
18.7
15.3
21.7
18
20.9
17.5
23.9
20
16.8
13.4
19.8
20
19.3
15.9
22.3
22
14.7
11.3
17.7
22
17.6
14.2
20.6
24
12.5
9.1
15.5
24
15.7
12.3
18.7
25
11.4
8
14.4
25
14.8
11.4
17.8
26
10.2
6.8
13.2
26
13.8
10.4
16.8
28
7.7
4.3
10.7
28
11.6
8.2
14.6
30
5.1
1.7
8.1
30
9.3
5.9
12.3
32
2.3
-1.1
5.3
32
6.8
3.4
9.8
34
-0.7
-4.1
5
34
4.1
0.7
7.1
35
-2.3
-5
5
35
2.7
-0.7
5.7
36
-3.9
-5
5
36
1.3
-2.1
5
38
-7.3
-5
5
38
-1.8
-5
5
40
-10.8
-5
5
40
-5.2
-5
5
42
-14.6
-5
5
42
-8.8
-5
5
44
-18.6
-5
5
44
-12.6
-5
5
45
-20.7
-5
5
45
-14.6
-5
5
46
-22.9
-5
5
46
-16.7
-5
5
48
-27.3
-5
5
48
-21.1
-5
5
50
-32.1
-5
5
50
-25.8
-5
5
Summary of Contents for Ascend ACR Series
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