Thomas & Betts UDAP Manuale Utente
Form RZ-NA I-UDA, Mfg #195673 Rev 5, Page 15
High Altitude
Capacity Changes
Capacity Changes
The input and/or the capacity of the heater changes with the derate. The tables
below list inputs and capacities at altitudes from sea level to 10,000 ft (3045M).
below list inputs and capacities at altitudes from sea level to 10,000 ft (3045M).
Normal
Input
Thermal
Output
Capacity
Minimum
Input
Normal
Input
Thermal
Output
Capacity
Minimum
Input
Normal
Input
Thermal
Output
Capacity
Minimum
Input
Normal
Input
Thermal
Output
Capacity
Minimum
Input
Feet
Meters
0-2000
0-610
30000
24600
30000
45000
37350
45000
60000
49800
42000
75000
62250
52500
2001-3000
611-915
28200
23124
28200
42300
35109
42300
56400
46812
39480
70500
58515
49350
3001-4000
916-1220
27600
22632
27600
41400
34362
41400
55200
45816
38640
69000
57270
48300
4001-5000
1221-1525
27000
22140
27000
40500
33615
40500
54000
44820
37800
67500
56025
47250
5001-6000
1526-1830
26400
21648
26400
39600
32868
39600
52800
43824
36960
66000
54780
46200
6001-7000
1831-2135
25800
21156
25800
38700
32121
38700
51600
42828
36120
64500
53535
45150
7001-8000
2136-2440
25200
20664
25200
37800
31374
37800
50400
41832
35280
63000
52290
44100
8001-9000
2441-2745
24600
20172
24600
36900
30627
36900
49200
40836
34440
61500
51045
43050
9001-10000 2746-3045
24000
19680
24000
36000
29880
36000
48000
39840
33600
60000
49800
42000
Feet
Meters
0-2000
0-610
105000
88200
73500
120000 100800
84000
150000 124500
105000 175000 145250
122500
2001-3000
611-915
98700
82908
69090
112800
94752
78960
141000 117030
98700
164500 136535
115150
3001-4000
916-1220
96600
81144
67620
110400
92736
77280
138000 114540
96600
161000 133630
112700
4001-5000
1221-1525
94500
79380
66150
108000
90720
75600
135000 112050
94500
157500 130725
110250
5001-6000
1526-1830
92400
77616
64680
105600
88704
73920
132000 109560
92400
154000 127820
107800
6001-7000
1831-2135
90300
75852
63210
103200
86688
72240
129000 107070
90300
150500 124915
105350
7001-8000
2136-2440
88200
74088
61740
100800
84672
70560
126000 104580
88200
147000 122010
102900
8001-9000
2441-2745
86100
72324
60270
98400
82656
68880
123000 102090
86100
143500 119105
100450
9001-10000 2746-3045
84000
70560
58800
96000
80640
67200
120000
99600
84000
140000 116200
98000
Feet
Meters
0-2000
0-610
200000 166000
140000 225000 186750
157500 250000 207500
175000 300000 249000
210000
2001-3000
611-915
188000 156040
131600 211500 175545
148050 235000 195050
164500 282000 234060
197400
3001-4000
916-1220
184000 152720
128800 207000 171810
144900 230000 190900
161000 276000 229080
193200
4001-5000
1221-1525 180000 149400
126000 202500 168075
141750 225000 186750
157500 270000 224100
189000
5001-6000
1526-1830 176000 146080
123200 198000 164340
138600 220000 182600
154000 264000 219120
184800
6001-7000
1831-2135 172000 142760
120400 193500 160605
135450 215000 178450
150500 258000 214140
180600
7001-8000
2136-2440 168000 139440
117600 189000 156870
132300 210000 174300
147000 252000 209160
176400
8001-9000
2441-2745 164000 136120
114800 184500 153135
129150 205000 170150
143500 246000 204180
172200
9001-10000 2746-3045 160000 132800
112000 180000 149400
126000 200000 166000
140000 240000 199200
168000
Feet
Meters
0-2000
0-610
350000 290500
245000 400000 332000
280000
2001-3000
611-915
329000 273070
230300 376000 312080
263200
3001-4000
916-1220
322000 267260
225400 368000 305440
257600
4001-5000
1221-1525 315000 261450
220500 360000 298800
252000
5001-6000
1526-1830 308000 255640
215600 352000 292160
246400
6001-7000
1831-2135 301000 249830
210700 344000 285520
240800
7001-8000
2136-2440 294000 244020
205800 336000 278880
235200
8001-9000
2441-2745 287000 238210
200900 328000 272240
229600
9001-10000 2746-3045 280000 232400
196000 320000 265600
224000
Size 75
Size 150
Size 175
Size 225
Size 400
Size 350
BTUH Inputs and Capacities by Altitude in the UNITED STATES for Model UDAP and Model UDAS
Size 100
Size 125
Size 200
Size 250
Size 300
Size 30
Size 45
Size 60
ALTITUDE
Normal
Input
Thermal
Output
Capacity
Minimum
Input
Normal
Input
Thermal
Output
Capacity
Minimum
Input
Normal
Input
Thermal
Output
Capacity
Minimum
Input
Normal
Input
Thermal
Output
Capacity
Minimum
Input
Feet
Meters
0-2000
0-610
30000
24600
30000
45000
37350
45000
60000
49800
42000
75000
62250
52500
2001-4500
611-1373
27000
22140
27000
40500
33615
40500
54000
44820
37800
67500
56025
47250
Feet
Meters
0-2000
0-610
105000
88200
73500
120000 100800
84000
150000 124500
105000 175000 145250
122500
2001-4500
611-1373
94500
79380
66150
108000
90720
75600
135000 113400
94500
157500 132300
110250
Feet
Meters
0-2000
0-610
200000 166000
140000 225000 186750
157500 250000 207500
175000 300000 249000
210000
2001-4500
611-1373
180000 151200
126000 202500 170100
141750 225000 189000
157500 270000 226800
189000
Feet
Meters
0-2000
0-610
350000 290500
245000 400000 332000
280000
2001-4500
611-1373
315000 264600
220500 360000 302400
252000
Size 350
Size 400
Size 200
Size 225
Size 250
Size 300
Size 150
Size 175
Size 100
Size 125
BTUH Inputs and Capacities by Altitude in CANADA for Models UDAP and UDAS
Size 75
ALTITUDE
Size 30
Size 45
Size 60