60
AC-SVX003A-EN
Table 21. Low evaporator refrigerant temperature cutout (LERTC) and low water temperature cutout (LWTC) — 150 to
330 ton units (continued)
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)
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
Table 22. Low evaporator refrigerant temperature cutout (LERTC) and low water temperature cutout (LWTC) — units
larger than 330 tons
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 32.0 32.0 37.0 0 32.0 32.0 37.0
2 31.0 29.5 36.0 2 31.0 29.5 36.0
4 29.7 28.2 34.7 4 29.9 28.4 34.9
5 29.0 27.5 34.0 5 29.3 27.8 34.3
6 28.3 26.8 33.3 6 28.7 27.2 33.7
8 26.9 25.4 31.9 8 27.6 26.1 32.6
10 25.5 24.0 30.5 10 26.4 24.9 31.4
12 23.9 22.4 28.9 12 25.1 23.6 30.1
14 22.3 20.8 27.3 14 23.8 22.3 28.8
15 21.5 20.0 26.5 15 23.1 21.6 28.1
16 20.6 19.1 25.6 16 22.4 20.9 27.4
18 18.7 17.2 23.7 18 20.9 19.4 25.9
20 16.8 15.3 21.8 20 19.3 17.8 24.3
22 14.7 13.2 19.7 22 17.6 16.1 22.6
24 12.5 11.0 17.5 24 15.7 14.2 20.7
25 11.4 9.9 16.4 25 14.8 13.3 19.8
26 10.2 8.7 15.2 26 13.8 12.3 18.8
28 7.7 6.2 12.7 28 11.6 10.1 16.6
30 5.1 3.6 10.1 30 9.3 7.8 14.3
32 2.3 0.8 7.3 32 6.8 5.3 11.8
34 -0.7 -2.2 5.0 34 4.1 2.6 9.1
35 -2.3 -3.8 5.0 35 2.7 1.2 7.7
36 -3.9 -5.0 5.0 36 1.3 -0.2 6.3
38 -7.3 -5.0 5.0 38 -1.8 -3.3 5.0
40 -10.8 -5.0 5.0 40 -5.2 -5.0 5.0
42 -14.6 -5.0 5.0 42 -8.8 -5.0 5.0
44 -18.6 -5.0 5.0 44 -12.6 -5.0 5.0
45 -20.7 -5.0 5.0 45 -14.6 -5.0 5.0
46 -22.9 -5.0 5.0 46 -16.7 -5.0 5.0
Installation Mechanical
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