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1034868-UIM-A-0513
Table 8: Maximum Equivalent Pipe Length (Continued)
Elevation 2001 - 4000
Model Input (BTUH)
Pipe Size (in)
40,000
40,000
40,000
60,000
60,000
60,000
80,000
80,000
80,000
100,000
100,000
100,000
120,000
120,000
Elevation 4001 - 5000
Model Input (BTUH)
Pipe Size (in)
40,000
40,000
40,000
60,000
60,000
60,000
80,000
80,000
80,000
100,000
100,000
100,000
120,000
120,000
Elevation 5001 - 6000
Model Input (BTUH)
Pipe Size (in)
40,000
40,000
40,000
60,000
60,000
60,000
80,000
80,000
80,000
100,000
100,000
100,000
120,000
120,000
Table 9: High Altitude Pressure Switches
High Altitude Pressure Switches required for all installations above 5000 Feet
Part Number
S1-1PS3308
26
Max. equivalent Length (ft)
2
55
3
80
4
145
2
55
3
80
4
145
2
55
3
80
4
145
2
20
3
80
4
145
3
80
4
145
Max. equivalent Length (ft)
2
50
3
75
4
140
2
50
3
75
4
140
2
50
3
75
4
140
2
15
3
75
4
140
3
75
4
140
Max. equivalent Length (ft)
2
45
3
70
4
135
2
45
3
70
4
135
2
35
3
70
4
135
2
10
3
70
4
135
3
70
4
135
Models
All
Elevation 7001-8000
Model Input (BTUH)
Pipe Size (in)
40,000
40,000
40,000
60,000
60,000
60,000
80,000
80,000
80,000
100,000
100,000
100,000
120,000
120,000
Elevation 8001-9000
Model Input (BTUH)
Pipe Size (in)
40,000
40,000
40,000
60,000
60,000
60,000
80,000
80,000
80,000
100,000
100,000
100,000
120,000
120,000
Elevation 9001-10000
Model Input (BTUH)
Pipe Size (in)
40,000
40,000
40,000
60,000
60,000
60,000
80,000
80,000
80,000
100,000
100,000
100,000
120,000
120,000
Max. equivalent Length (ft)
2
35
3
60
4
125
2
35
3
60
4
125
2
25
3
60
4
125
2
NA
3
60
4
125
3
60
4
125
Max. equivalent Length (ft)
2
30
3
55
4
120
2
30
3
55
4
120
2
20
3
55
4
120
2
NA
3
55
4
120
3
55
4
120
Max. equivalent Length (ft)
2
25
3
50
4
115
2
25
3
50
4
115
2
15
3
50
4
115
2
NA
3
50
4
115
3
50
4
115
Johnson Controls Unitary Products
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