Trane RTAF-SVX001K-EN - Page 44

Installation Mechanical
44 RTAF-SVX001K-EN
Table 19. Propylene glycol — low evaporator refrigerant temperature cutout (LERTC) and low water temperature
cutout (LWTC)
Unit Sizes 115 to 270 tons Unit Sizes 280 to 520 tons
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 32.0 28.6 35.0 0 32.0 32.0 37.0
2 31.0 27.6 34.0 2 31.0 29.5 36.0
4 29.9 26.5 32.9 4 29.9 28.4 34.9
5 29.3 25.9 32.3 5 29.3 27.8 34.3
6 28.7 25.3 31.7 6 28.7 27.2 33.7
8 27.6 24.2 30.6 8 27.6 26.1 32.6
10 26.4 23.0 29.4 10 26.4 24.9 31.4
12 25.1 21.7 28.1 12 25.1 23.6 30.1
14 23.8 20.4 26.8 14 23.8 22.3 28.8
15 23.1 19.7 26.1 15 23.1 21.6 28.1
16 22.4 19.0 25.4 16 22.4 20.9 27.4
18 20.9 17.5 23.9 18 20.9 19.4 25.9
20 19.3 15.9 22.3 20 19.3 17.8 24.3
22 17.6 14.2 20.6 22 17.6 16.1 22.6
24 15.7 12.3 18.7 24 15.7 14.2 20.7
25 14.8 11.4 17.8 25 14.8 13.3 19.8
26 13.8 10.4 16.8 26 13.8 12.3 18.8
28 11.6 8.2 14.6 28 11.6 10.1 16.6
30 9.3 5.9 12.3 30 9.3 7.8 14.3
32 6.8 3.4 9.8 32 6.8 5.3 11.8
34 4.1 0.7 7.1 34 4.1 2.6 9.1
35 2.7 -0.7 5.7 35 2.7 1.2 7.7
36 1.3 -2.1 5.0 36 1.3 -0.2 6.3
38 -1.8 -5.0 5.0 38 -1.8 -3.3 5.0
40 -5.2 -5.0 5.0 40 -5.2 -5.0 5.0
42 -8.8 -5.0 5.0 42 -8.8 -5.0 5.0
44 -12.6 -5.0 5.0 44 -12.6 -5.0 5.0
45 -14.6 -5.0 5.0 45 -14.6 -5.0 5.0
46 -16.7 -5.0 5.0 46 -16.7 -5.0 5.0
48 -21.1 -5.0 5.0 48 -21.1 -5.0 5.0
50 -25.8 -5.0 5.0 50 -25.8 -5.0 5.0