Trane CVHE

CVHE-SB-32A 115
The following graph illustrates the reset functions of the above examples:
The following graph shows the reset function for Return CWR:
Note: This graph assumes Maximum Reset is set to 20 degrees.
Degrees of Reset vs Outdoor Air Temp
5.25
7
0
2
4
6
8
10
12
14
16
18
20
35 45 55 65 75 85 95
105 115 125 135
Outdoor Air Temp
Degrees of Reset(F)
Positive Reset Ratio
Negitive Reset Ratio
MR = 10.5
MR = 17
SR = 80
SR = 90
RR = .35
RR = -.7
MR = Maximum Reset
SR = Start Reset (F)
RR = Reset Ratio
Return CWR
0
2
4
6
8
10
12
14
16
18
20
30 27 24 21 18 15 12 9 6 3 0
TWE-TWL
Degrees of Reset
30 deg Start Reset
20 deg Start Reset
10 deg Start Reset
_______________________
Reset Ratio
+70
+50
+30
14
12.6
11.2
9.8
8.4
7
4
2
1
0
6
5.4
4.8
4.2
3
3.6
2.4
1.8
1.2
.6
0
+100
5.6
4.2
2.8
1.4
0
10
9
8
7
6
5
3