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6 EPU‐D Installation and Operation Manual
Outdoor Cutoff Minus Outdoor Temperature (All Temperatures in °F)
*
95
90
85
A
45
41
37
B
57
51
46
C
C
59
54
D
C
C
C
E
C
C
C
F
C
C
C
G
C
C
C
H
C
C
C
I
C
C
C
J
C
C
C
K
C
C
C
L
C
C
C
M
C
C
C
N
C
C
C
O
C
C
C
P
C
C
C
* Heat Adjustment Setting – See "Day Adjustment" on page 30 and "Night Adjustment" on page 30.
Example
To determine the cycle length, use the example values below:
• Outdoor temperature = 30°F
• Outdoor Cutoff = 55°F
• Heat Adjustment = G
1. Subtract the outdoor temperature from the Outdoor Cutoff (55–30 = 25°F)
2. Refer to Table 1 where the Heat Adjustment row "G" intersects with the 25°F column. The Cycle‐ON time is
14 minutes (for a 60 minute cycle).
NOTE: For different cycle lengths, refer to the table below:
059840‐00 Rev. A
Table 1: Cycle Length Table
80
75
70
65
60
33
29
25
22
18
41
37
33
28
25
48
43
38
33
29
55
49
43
38
34
C
55
49
43
38
C
C
55
49
43
C
C
C
54
48
C
C
C
C
53
C
C
C
C
59
C
C
C
C
C
C
C
C
C
C
C
C
C
C
C
C
C
C
C
C
C
C
C
C
C
C
C
C
C
C
C
C
C
C
C
Minutes ON (Based on 60 Minute Cycle Length)
C = Continuous Operation
Cycle Length
20
30
90
55
50
45
40
35
15
13
10
8
5
21
18
15
12
9
25
21
18
15
12
29
25
21
17
14
33
28
24
20
17
37
32
27
23
19
42
36
31
26
22
47
40
35
29
25
52
45
39
33
27
58
50
43
37
31
C
56
48
41
34
C
C
53
45
38
C
C
59
51
43
C
C
C
56
47
C
C
C
C
53
C
C
C
C
59
Divide by
Cycle‐ON
3
2
2/3
30
25
20
15
3
2
0
0
7
5
3
1
9
7
5
3
11
9
6
4
13
10
8
6
15
12
9
7
18
14
11
8
20
16
13
10
23
18
15
11
25
21
16
13
28
23
19
15
32
26
21
16
35
29
23
18
39
32
26
20
44
36
29
23
49
40
32
25
5
7
21
Heat‐Timer Corp.
10
5
1
0
0
0
0
0
0
1
0
0
2
1
0
4
2
1
5
3
2
6
4
3
7
5
4
9
6
5
10
7
6
11
8
7
13
9
7
14
11
8
16
12
9
17
13
10
19
15
12
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