Trane RTHC - Freeze Protection; For unit operation in a low temperature environment, adequate protection measures must be taken against freezing.

9 - 6 RTHC-IOM-1C
Freeze Protection
For unit operation in a low temperature environment,
adequate protection measures must be taken against
freezing. Adjusted settings and recommended
ethylene glycol solution strengths are contained in
Table 31 following.
Notes: * Refer to unit Model No. digits 6, 12, 16
N/A means chiller is not to be applied at leaving evaporator water temperatures, which result in the LRTC setting below those shown in the
table.
When setting up an ice-making system, the ice
termination setpoint is the entering water.
Subtract 6
° F from the setpoint to use Table 31
(Chilled Water Setpoint (ice-making only) = Ice
Termination Setpoint - 6
° F).
Table 31
Low Refrigerant Temperature, Ethylene Glycol, and Freeze Protection Settings
DDE, EDE, CBC* DFF, EFF, CDE, BCD, BBB* DGG, EGG, CGG, CEF*
Chilled
Water
Setpt
(
° F)
Leaving
Wtr Temp
Cutout
(
° F)
Low Rfgt
Temp
Cutout (
° F)
Rec %
Ethylene
Glycol
Solution
Freeze
Point
(
° F)
Low Rfgt
Temp
Cutout (
° F)
Rec %
Ethylene
Glycol
Solution
Freeze
Point
(
° F)
Low Rfgt
Temp
Cutout (
° F)
Rec %
Ethylene
Glycol
Solution
Freeze
Point
(
° F)
40 34 28.6 0 32.0 28.6 0 32.0 28.6 0 32.0
39 33 27.2 2 30.6 27.6 1 31.3 27.9 0 32.0
38 32 25.7 4 29.1 26.5 3 30.1 27.2 2 31.1
37 31 24.2 6 27.6 25.4 5 28.9 26.5 3 30.2
36 30 22.7 8 26.1 24.2 6 27.7 25.7 4 29.3
35 29 21.1 11 24.5 23.0 8 26.4 24.9 6 28.3
34 28 20.2 12 23.6 22.1 10 25.5 24.0 7 27.4
33 27 19.2 13 22.6 21.1 11 24.5 23.0 8 26.4
32 26 18.1 15 21.5 20.1 12 23.5 22.0 10 25.4
31 25 17.0 16 20.4 18.8 14 22.2 20.6 12 24.0
30 24 15.9 17 19.3 17.6 15 21.0 19.3 13 22.7
29 23 14.8 18 18.2 16.6 16 20.0 18.4 14 21.8
28 22 13.6 20 17.0 15.5 17 18.9 17.4 15 20.8
27 21 12.4 21 15.8 14.4 18 17.8 16.4 16 19.8
26 20 11.2 22 14.6 13.3 20 16.7 15.4 17 18.8
25 19 9.9 23 13.3 12.1 21 15.5 14.3 19 17.7
24 18 8.6 24 12.0 10.9 22 14.3 13.2 20 16.6
23 17 7.3 25 10.7 9.7 23 13.1 12.1 21 15.5
22 16 5.9 26 9.3 8.4 24 11.8 10.9 22 14.3
21 15 4.5 27 7.9 7.1 25 10.5 9.7 23 13.1
20 14 3.1 28 6.5 5.8 26 9.2 8.5 24 11.9
19 13 1.6 30 5.0 4.4 27 7.8 7.3 25 10.7
18 12 0.1 31 3.5 3.1 29 6.5 6.0 27 9.4
17 11 -1.4 32 2.0 1.6 30 5.0 4.7 28 8.1
16 10 -2.9 33 0.5 0.2 31 3.6 3.3 29 6.7
15 9 -4.5 33 -1.1 -1.3 32 2.1 2.0 30 5.4
14 8 N/A 34 -2.8 -2.8 33 0.6 0.6 31 4.0
13 7 N/A 35 -4.4 -4.3 34 -0.9 -0.8 32 2.6
12 6 N/A 36 -6.1 N/A 34 -2.5 -2.3 33 1.1
11 5 N/A 37 -7.8 N/A 35 -4.1 -3.8 34 -0.4
10 4 N/A 38 -9.6 N/A 36 -5.7 -5.3 34 -1.9